CN105305758B - Driving motor for compressor and the compressor with the driving motor - Google Patents
Driving motor for compressor and the compressor with the driving motor Download PDFInfo
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- CN105305758B CN105305758B CN201410271489.6A CN201410271489A CN105305758B CN 105305758 B CN105305758 B CN 105305758B CN 201410271489 A CN201410271489 A CN 201410271489A CN 105305758 B CN105305758 B CN 105305758B
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Abstract
The invention discloses a kind of driving motor for compressor and the compressors with the driving motor.Driving motor for compressor includes: stator, rotor and permanent magnet fixed part part.Rotor is set in outside stator, rotor includes rotation section and multiple permanent magnets, rotation section is configured to tubular construction and including crankshaft connection wall and side wall, side wall is arranged on the upper surface or lower surface of crankshaft connection wall, side wall is formed with radially inwardly extending annular flange on the farther away one end of crankshaft connection wall, multiple permanent magnets are uniformly distributed circumferentially in the inside of side wall, and the upper and lower end face of each permanent magnet is respectively only to the side relative to each other of crankshaft connection wall and annular flange.Multiple permanent magnets are located in the inside of side wall and carry out circumferential and radial limit to each permanent magnet by permanent magnet fixed part part.Driving motor of the invention is, it can be achieved that circumferential, the radial and axial comprehensive limit to permanent magnet.
Description
Technical Field
The invention relates to the field of compressors, in particular to a driving motor for a compressor and a compressor with the driving motor.
Background
With the development of the refrigeration industry, the inverter compressor gradually becomes the mainstream of the compressor industry. The motor applied to the variable frequency compressor at present is mainly an embedded permanent magnet synchronous motor. The embedded motor is limited in space due to the fact that the rotor is located inside the stator, the using amount of the permanent magnet is limited, and the energy efficiency of the motor is not improved. The motor disclosed in the related art increases the output power of the motor by increasing the axial dimension, but the increase in the axial dimension affects the rigidity of the rotating shaft and the manufacturability of the compressor, resulting in an increase in noise and vibration of the compressor. In addition, the embedded motor is not beneficial to heat dissipation of the permanent magnet, and even irreversible demagnetization of the permanent magnet can be caused.
In recent years, the feasibility of applying an external rotor motor to a compressor has been receiving wide attention. The rotor of the outer rotor motor is positioned outside the stator, so that the using amount of the permanent magnet can be increased, high energy efficiency and flattening of the motor are easy to realize, and meanwhile, the outer rotor motor mostly adopts a permanent magnet surface-mounted structure, and heat dissipation of the permanent magnet is facilitated.
However, the fixing method of the permanent magnet of the outer rotor type motor is a difficulty of the motor having such a structure, and the permanent magnet is fixed in the rotor cylinder by the adhesive bonding method in the manner disclosed in the related art. However, when the rotor is operated at a high speed or subjected to an axial force, the permanent magnets may move axially, radially or circumferentially only by cementing, so that magnetic leakage at the end of the rotor is large, and the magnet utilization rate is reduced.
Disclosure of Invention
The present invention is directed to at least solving the problems of the prior art. Therefore, an object of the present invention is to provide a driving motor for a compressor, which has a strong fixation of permanent magnets, a small amount of magnetic flux leakage at the end of a rotor, and a high magnet utilization rate.
Another object of the present invention is to provide a compressor having the above-mentioned driving motor for a compressor.
The driving motor for a compressor according to an embodiment of the present invention includes: a stator; the rotor is sleeved outside the stator and is suitable for being connected with a crankshaft of the compressor to drive the crankshaft to rotate, the rotor comprises a rotating part and a plurality of permanent magnets, the rotating part is of an inverted cylindrical structure and comprises a crankshaft connecting wall and a side wall, the side wall is arranged on the upper surface or the lower surface of the crankshaft connecting wall, an annular flange extending inwards in the radial direction is formed at one end, far away from the crankshaft connecting wall, of the side wall, the permanent magnets are uniformly distributed on the inner side of the side wall in the circumferential direction, and the upper end face and the lower end face of each permanent magnet respectively abut against the side faces, opposite to each other, of the crankshaft connecting wall and the annular flange; and the permanent magnet fixing part is arranged on the inner wall surface of the side wall, positions the permanent magnets on the inner side of the side wall and limits each permanent magnet in the circumferential direction and the radial direction.
According to the driving motor for the compressor provided by the embodiment of the invention, the rotating part of the rotor is arranged into a cylinder shape with the crankshaft connecting wall and the annular flange, so that two ends of the permanent magnet are respectively abutted against the crankshaft connecting wall and the annular flange to limit the axial movement of the permanent magnet, and meanwhile, the permanent magnet fixing part is adopted to limit the circumferential movement and the radial movement of the permanent magnet, so that the stability and the reliability of the connection between the permanent magnet and the rotating part are improved, the reliability of the driving motor is further improved, and the service life of the driving motor is prolonged. Meanwhile, the magnetic leakage at the end part of the rotor is small, so that the utilization rate of the permanent magnet is improved, the structure of the rotating part is simple, the processing is easy, and the cost is low.
In addition, the driving motor for a compressor according to the present invention may further have the following additional technical features:
in some embodiments of the present invention, the rotating portion is configured as an inverted cylindrical structure and includes a top wall and a side wall, an upper end of the side wall being provided on a lower surface of the top wall, the annular flange being provided on a lower end of the side wall, the top wall constituting the crankshaft connecting wall.
In some embodiments of the invention, the top wall includes a top wall arc portion and a top wall straight portion, the top wall straight portion being located at an outer peripheral edge of the top wall arc portion, an upper end surface of the permanent magnet abutting against a lower surface of the top wall straight portion; and the sidewall is orthogonal to the top wall flat portion and the annular flange is orthogonal to the sidewall.
Specifically, the permanent magnet fixing parts are a plurality of permanent magnet fixing parts and are circumferentially staggered with the permanent magnets, and one permanent magnet is clamped between two adjacent permanent magnet fixing parts and circumferentially and radially limited. Therefore, the adjacent permanent magnets and the permanent magnet fixing parts are tightly connected, so that the permanent magnets and the permanent magnet fixing parts are not easy to move circumferentially, and the reliability of connection between the permanent magnets and the rotating parts is improved.
More specifically, the permanent magnet fixing part includes: a body portion extending in an axial direction of the crankshaft; the protruding parts are formed on two sides of the body parts respectively, the permanent magnets are clamped between the protruding parts and the side walls through the protruding parts so as to limit the permanent magnets in the radial direction, and the permanent magnets are clamped between the two body parts through the two adjacent body parts so as to limit the permanent magnets in the circumferential direction. Thus, the permanent magnet fixing member is simple in structure.
Optionally, a protrusion inclined surface is configured on the protrusion, and a permanent magnet inclined surface in close fit with the protrusion inclined surface is configured on the permanent magnet. Thereby, the contact area between the permanent magnet and the permanent magnet fixing part can be increased, so that the permanent magnet fixing part can firmly fix the permanent magnet on the rotating part.
In some embodiments of the present invention, the permanent magnet fixing part is plural and corresponds to the plural permanent magnets, respectively, and each of the permanent magnet fixing parts includes: the permanent magnet clamping device comprises two sub-fixing parts, wherein each sub-fixing part comprises a straight section and a bending section, the bending section is obliquely arranged relative to the straight section, the bending sections of the two sub-fixing parts clamp corresponding permanent magnets between the two bending sections and the side wall so as to radially limit the permanent magnets, and the straight sections of the two sub-fixing parts clamp corresponding permanent magnets between the two straight sections so as to circumferentially limit the permanent magnets. Thereby, it may be facilitated to fix each permanent magnet individually.
Optionally, the straight section and the bent section are of an integrally formed elastic sheet structure. Therefore, the sub-fixing part with the elastic sheet structure can be better matched with the permanent magnet in an elastic manner, so that the corresponding permanent magnet can be better fixed and limited.
Specifically, the upper end of the permanent magnet fixing part is fixed to the lower surface of the top wall; or the lower end of the permanent magnet fixing part is fixed to the upper surface of the annular flange; or an upper end of the permanent magnet fixing part is fixed to a lower surface of the top wall and a lower end of the permanent magnet fixing part is fixed to an upper surface of the annular flange.
More specifically, the permanent magnet fixing part includes an upper section spaced apart from the lower section up and down, the upper section being fixed to a lower surface of the top wall, and the lower section being fixed to an upper surface of the annular flange.
Optionally, the upper section is detachably connected to the top wall; or the upper section is integral with the top wall.
Optionally, the lower section is removably connected to the annular flange; or the lower section is integral with the annular flange.
Advantageously, the length of the permanent magnet fixing part is equal to the distance from the upper surface of the annular flange to the lower surface of the top wall flat portion. Therefore, the two ends of the permanent magnet fixing part can be respectively abutted against the upper surface of the annular flange and the lower surface of the flat part of the top wall, so that the permanent magnet fixing part is convenient to position and mount, and the movement of the permanent magnet fixing part in the axial direction can be limited.
In some embodiments of the invention, the top wall and the annular flange are non-magnetic. Therefore, the end magnetic flux leakage of the driving motor can be effectively reduced, and the energy efficiency of the driving motor is further improved.
Optionally, the top wall and the annular flange are aluminum alloy pieces or stainless steel pieces. Thereby being convenient for the processing of the top wall and the annular flange and ensuring the firm and reliable structure of the outer rotor.
In some embodiments of the invention, the permanent magnet fixing part is an elastic part. Therefore, the permanent magnet fixing part can elastically limit the permanent magnet to form elastic fit, so that the permanent magnet can be fixed better, the permanent magnet is prevented from moving in the circumferential direction and the radial direction, and the reliability of the structure is improved. In addition, the permanent magnet fixing part is elastically matched with the permanent magnet, so that the rotor is convenient to assemble and process, and the manufacturing efficiency of the rotor is improved.
Optionally, the permanent magnet fixing part is a rubber or plastic part.
The compressor according to the embodiment of the present invention includes the driving motor for the compressor according to the above-described embodiment of the present invention.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 and 2 are schematic structural views of a rotor and a permanent magnet fixing part according to two different embodiments of the present invention;
FIGS. 3 and 4 are schematic structural views of a driving motor and a crankshaft according to two different embodiments of the present invention;
FIGS. 5 to 7 are schematic structural views of a rotating part and a crankshaft according to three embodiments of the present invention;
figures 8 and 9 are schematic structural views of the top wall, the permanent magnet fixing part and the crankshaft according to two different embodiments of the invention;
fig. 10-11 are schematic structural views of an annular flange, a permanent magnet fixing part, and a crankshaft according to two different embodiments of the present invention.
Reference numerals:
a drive motor 100,
A stator 1,
A rotor 2, a rotating portion 21, a top wall 211, a top wall arc surface portion 2111, a top wall straight portion 2112, a first end surface 2113, a side wall 212, an annular flange 213, a second end surface 2134, a mounting hole 214, a mounting hole,
Permanent magnet 22, permanent magnet inclined plane 221,
A permanent magnet fixing part 3,
A main body 31, a boss 32, a boss slope 321,
A sub-fixing part 33, a straight section 331, a bent section 332,
An upper section 34, a lower section 35,
Crankshaft 200.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "center", "length", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A driving motor 100 for a compressor according to an embodiment of the present invention will be described with reference to fig. 1 to 11.
The driving motor 100 for a compressor according to an embodiment of the present invention, as shown in fig. 1 to 4, includes: stator 1, rotor 2 and permanent magnet fixing part 3. The rotor 2 is sleeved outside the stator 1, that is, the driving motor 100 according to the embodiment of the present invention is an external rotor motor. Rotor 2 is adapted to be coupled to crankshaft 200 of the compressor to drive crankshaft 200 in rotation.
After the driving motor 100 is powered on, a magnetic field is generated, and the magnetic field drives the rotor 2 to rotate relative to the stator 1, so as to drive the crankshaft 200 to rotate. It should be noted that the operation principle of the driving motor 100 and the structure of the stator 1 are prior art and will not be described in detail here.
Referring to fig. 1 to 4, the rotor 2 includes a rotating portion 21 and a plurality of permanent magnets 22, the rotating portion 21 may be configured in a cylindrical structure and include a crankshaft connecting wall (e.g., a top wall 211) adapted to be connected to the crankshaft 200 and a side wall 212, the side wall 212 may be disposed on an upper surface or a lower surface of the crankshaft connecting wall, a radially inwardly extending annular flange 213 is formed on an end of the side wall 212 farther from the crankshaft connecting wall, and an upper end surface and a lower end surface of each permanent magnet 22 respectively abut against mutually opposite side surfaces of the crankshaft connecting wall and the annular flange 213, thereby achieving axial limitation of the permanent magnet 22 by the crankshaft connecting wall and the annular flange 213.
In some embodiments, as shown in fig. 3 to 7, the rotating portion 21 may be configured as an inverted cylindrical structure, and include a top wall 211 and a side wall 212, an upper end of the side wall 212 is disposed at a lower surface of the top wall 211, an annular flange 213 may be formed at a lower end of the side wall 212, and the top wall 211 constitutes the above-described crankshaft connecting wall.
However, the present invention is not limited thereto, and in other embodiments of the present invention, the rotating portion 21 may be configured as a cylindrical structure with an open top, i.e., in an opposite direction to the above-described opening of the inverted cylindrical structure. That is, in this embodiment, the rotating portion 21 may include a bottom wall and a side wall 212, the side wall 212 may be provided on an upper surface of the bottom wall, and an annular flange 213 is formed at an upper end of the side wall 212, the bottom wall constituting the above-described crankshaft connecting arm.
Hereinafter, the rotating portion 21 will be schematically described by way of example as being configured as an inverted cylindrical structure and including the top wall 211 and the side wall 212, but this does not mean or imply that the rotating portion 21 according to the embodiment of the present invention must be configured as such an inverted cylindrical structure, and the following description by way of example as the rotating portion 21 is merely for illustrative purposes and is not to be construed as a limitation of the present invention.
Specifically, the rotating portion 21 is configured as an inverted cylindrical structure and includes a top wall 211 and a side wall 212, an upper end of the side wall 212 is provided on a lower surface of the top wall 211 and a lower end of the side wall 212 is formed with an annular flange 213 extending radially inward, the plurality of permanent magnets 22 are uniformly distributed circumferentially inside the side wall 212, an upper end surface of each permanent magnet 22 abuts against the lower surface of the top wall 211 and a lower end surface of each permanent magnet 22 abuts against an upper surface of the annular flange 213, whereby the top wall 211 and the annular flange 213 can achieve axial position limitation of the permanent magnets 22.
Specifically, the top wall 211 may be fixedly connected to the crankshaft 200 through a central hub, that is, a central portion of the top wall 211 is formed in a substantially circular disk shape, a mounting hole 214 is formed in the top wall 211, the mounting hole 214 is concentrically disposed with the top wall 211, and the mounting hole 214 is externally sleeved on the crankshaft 200, so that the crankshaft 200 is fixedly connected to the rotating portion 21, and thus the rotating portion 21 drives the crankshaft 200 to rotate when the rotating portion 21 rotates.
More specifically, as shown in fig. 3, each permanent magnet 22 is a tile-shaped structure extending in the up-down direction, and each permanent magnet 22 is formed in a tile shape recessed toward a direction away from the crankshaft 200, and the outer wall surface of the permanent magnet 22 is abutted against the inner wall surface of the side wall 212, and in the example shown in fig. 1 and 2, the inner wall surface of the permanent magnet 22 and the inner wall surface of the annular flange 213 may be flush. Here, the outer wall surface of the permanent magnet 22 refers to a wall surface of the permanent magnet 22 away from the crankshaft 200, and the inner wall surface of the permanent magnet 22 refers to a wall surface of the permanent magnet 22 facing the crankshaft 200.
The lower surface of the top wall 211 is a first end surface 2113, the upper surface of the annular flange 213 is a second end surface 2134, and the upper and lower end surfaces of each permanent magnet 22 respectively abut against the first end surface 2113 and the second end surface 2134, so as to limit the axial movement of the permanent magnet 22 relative to the rotating portion 21, where the direction of the axial movement is the direction indicated by the arrow a in fig. 3.
Referring to fig. 1 to 3, a permanent magnet fixing part 3 is provided on an inner wall surface of the side wall 212, and the permanent magnet fixing part 3 positions a plurality of permanent magnets 22 inside the side wall 212 and performs circumferential and radial position limitation on each permanent magnet 22. Here, the circumferential limitation means that the permanent magnet fixing part 3 can limit each permanent magnet 22 from rotating relative to the rotating part 21, and the circumferential direction is the direction indicated by the arrow C in fig. 1. The radial limitation means that the permanent magnet fixing part 3 can prevent the permanent magnet 22 from moving radially relative to the rotating part 21, and the radial direction is the direction indicated by the arrow B in fig. 3.
From this, roof 211, annular flange 213 can cooperate permanent magnet fixed part 3 to fix permanent magnet 22 on rotation portion 21 completely, realize axial, circumference and radial all-round spacing, and when rotor 2 rotated at a high speed or received the exogenic action, permanent magnet 22 also can't take place to remove or rotate relative rotation portion 21 to make rotor 2's tip magnetic leakage less, and then improve permanent magnet 22's utilization ratio.
Wherein, by designing the rotating part 21 to have the shape of the top wall 211 and the annular flange 213, the upper and lower ends of the permanent magnet 22 are respectively stopped on the top wall 211 and the annular flange 213 to limit the axial movement of the permanent magnet 22, so that the fixation of the permanent magnet 22 is simpler and easier. Moreover, after the permanent magnet 22 is limited in the axial direction, the axial force borne by the permanent magnet fixing part 3 can be reduced, so that the permanent magnet fixing part 3 is not easily damaged or separated from the rotating part 21, and the connection reliability of the permanent magnet fixing part 3 is improved. Therefore, the permanent magnet 22 and the rotating part 21 are connected more stably and reliably, so that the reliability of the driving motor 100 is improved, and the service life of the driving motor 100 is prolonged. Meanwhile, the rotating part 21 has a simple structure, is easy to process and has low cost.
According to the driving motor 100 for the compressor of the embodiment of the present invention, the rotating part 21 of the rotor 2 is configured in a cylindrical shape having the crankshaft connecting wall and the annular flange 213, so that both ends of the permanent magnet 22 are respectively abutted against the crankshaft connecting wall and the annular flange 213 to limit the axial movement of the permanent magnet 22, and the permanent magnet fixing member 3 is adopted to limit the circumferential movement and the radial movement of the permanent magnet 22, thereby improving the stability and the reliability of the connection between the permanent magnet 22 and the rotating part 21, further improving the reliability of the driving motor 100, and prolonging the service life of the driving motor 100. Meanwhile, the end magnetic flux leakage of the rotor 2 is small, so that the utilization rate of the permanent magnet 22 is improved, and the rotating part 21 is simple in structure, easy to machine and low in cost.
In some embodiments of the present invention, as shown in fig. 5, the top wall 211, the side wall 212 and the annular flange 213 of the rotating portion 21 are respectively formed as independent parts, the top wall 211 and the annular flange 213 may be fixedly connected to both ends of the side wall 211 by welding, riveting, gluing, etc., and the top wall 211 and the annular flange 213 may also be detachably connected to both ends of the side wall 212 by screwing, etc., which is not limited in this respect.
Of course, the present invention is not limited thereto, for example, in the example shown in fig. 6, the top wall 211 and the side wall 212 are formed as an integrally formed member, and the annular flange 213 may be fixed to the lower end of the side wall 212 by welding, riveting, gluing, or the like. Also for example, in the example shown in fig. 7, the annular flange 213 is formed as an integral part with the side wall 212, and the top wall 211 may be fixed to the upper end of the side wall 212 by welding, riveting, gluing, or the like.
Specifically, the sidewall 212 is a magnetically conductive metal member, for example, the sidewall 212 may be made of cast iron, but the sidewall 212 may also be a silicon steel sheet.
Specifically, the top wall 211 and the annular flange 213 may be non-magnetic conductive members, so that the end leakage of the driving motor 100 may be effectively reduced, thereby improving the energy efficiency of the driving motor 100. Of course, the invention is not limited thereto, for example, when the top wall 211 and the side wall 212 are integrally formed, the top wall 211 and the side wall 212 may be magnetic conductive metal members, and when the annular flange 213 and the side wall 212 are integrally formed, the annular flange 213 and the side wall 212 may be magnetic conductive metal members, which is not limited herein.
Alternatively, the top wall 211 and the annular flange 213 are made of aluminum alloy or stainless steel, so as to facilitate the processing of the top wall 211 and the annular flange 213, and ensure the structural robustness and reliability of the outer rotor 2.
In some embodiments of the invention, as shown in fig. 3 and 4, the top wall 211 includes a top wall arc portion 2111 and a top wall flat portion 2112, the top wall flat portion 2112 is located at an outer peripheral edge of the top wall arc portion 2111, an upper end surface of the permanent magnet 22 abuts against a lower surface of the top wall flat portion 2112, and the side wall 212 is orthogonal to the top wall flat portion 2112, and the annular flange 213 is orthogonal to the side wall 212.
That is, the top wall arc portion 2111 constitutes the above-mentioned center hub, the mounting hole 214 is provided at the center position of the top wall arc portion 2111,
the lower surface of the top wall straight portion 2112 constitutes a first end surface 2113, the side wall 212 extends vertically downward from the outer edge of the bottom wall of the top wall straight portion 2112, and the annular flange 213 extends vertically inward from the bottom end of the side wall 212.
Specifically, as shown in fig. 2 and 3, the top wall arc surface portion 2111 is formed as an arc plate that is concave toward a direction away from the stator 1, the top wall flat portion 2112 is formed as an annular flat plate, and the top wall flat portion 2112 is provided around the outer periphery of the top wall arc surface portion 2111.
In some embodiments of the present invention, as shown in fig. 1, the permanent magnet fixing parts 3 are multiple and are arranged in a circumferentially staggered manner with the multiple permanent magnets 22, wherein one permanent magnet 22 is sandwiched between two adjacent permanent magnet fixing parts 3 and the one permanent magnet 22 is circumferentially and radially limited. That is, the plurality of permanent magnets 22 are arranged at intervals, the plurality of permanent magnet fixing parts 3 are also arranged at intervals, one permanent magnet fixing part 3 is arranged between every two adjacent permanent magnets 22, and one permanent magnet 22 is also clamped between every two adjacent permanent magnet fixing parts 3. In the example shown in fig. 1, 6 permanent magnets 22 are provided, 6 permanent magnet fixing parts 3 are also provided, and 6 permanent magnets 22 are provided to be staggered with 6 permanent magnet fixing parts 3. Therefore, the adjacent permanent magnets 22 and the permanent magnet fixing parts 3 are tightly connected, so that the permanent magnets 22 and the permanent magnet fixing parts 3 are not easy to move circumferentially, and the reliability of connection between the permanent magnets 22 and the rotating part 21 is improved.
Specifically, the outer wall surface of the permanent magnet fixing member 3 may be fixedly connected to the inner wall surface of the side wall 212 by welding, riveting, gluing, or the like, and the outer wall surface of the permanent magnet fixing member 3 may be detachably connected to the inner wall surface of the side wall 212 by screwing, or the like.
More specifically, as shown in fig. 1, the permanent magnet fixing component 3 includes a body portion 31 and a protrusion portion 32, the body portion 31 extends along the axial direction of the crankshaft 200, the protrusion portions 32 are respectively formed on both sides of the body portion 31, the protrusion portion 32 sandwiches the permanent magnet 22 between the protrusion portion 32 and the side wall 212 to radially restrain the permanent magnet 22, and two adjacent body portions 31 sandwich the permanent magnet 22 between the two body portions 31 to circumferentially restrain the permanent magnet 22. Thereby, the permanent magnet fixing member 3 is simple in structure.
Alternatively, as shown in fig. 1, the protrusion 32 is configured with a protrusion slope 321, and the permanent magnet 22 is configured with a permanent magnet slope 221 that is in close fit with the protrusion slope 321. Thereby, the contact area between the permanent magnet 22 and the permanent magnet fixing part 3 can be increased, so that the permanent magnet fixing part 3 can firmly fix the permanent magnet 22 to the rotating part 21.
In the example shown in fig. 1, the side faces of the protrusions 32 facing the respective permanent magnets 22 in the outside-to-inside direction are formed as slopes extending from the respective body portions 31 in the direction facing the respective permanent magnets 22, and the respective portions of the permanent magnets 22 are formed as permanent magnet slopes 221 that cooperate therewith, so that the permanent magnet fixing part 3 can restrict the radial movement of the permanent magnets 22. Moreover, the inner surface of the permanent magnet fixing part 3 can be flush with the inner surface of the permanent magnet 22, that is, the thickness of the permanent magnet fixing part 3 does not exceed the thickness of the permanent magnet 22, so that friction caused by contact with the stator 1 due to the excessively thick permanent magnet fixing part 3 is avoided, and the normal operation of the driving motor 100 is ensured.
In other embodiments of the present invention, as shown in fig. 2, the permanent magnet fixing part 3 includes two sub fixing parts 33, each sub fixing part 33 includes a straight section 331 and a bent section 332, the bent section 332 is disposed obliquely with respect to the straight section 331, the bent sections 332 of the two sub fixing parts 33 sandwich the permanent magnet 22 between the two bent sections 332 and the side wall 212 to radially limit the permanent magnet 22, and the straight sections 331 of the two sub fixing parts 33 sandwich the permanent magnet 22 between the two straight sections 331 to circumferentially limit the permanent magnet 22.
In other words, as shown in fig. 2, the permanent magnet fixing parts 3 are the same in number and respectively correspond to the permanent magnets 22 one by one, and each permanent magnet fixing part 3 is used for fixing one permanent magnet 22. In the example shown in fig. 2, the permanent magnets 22 and the permanent magnet fixing parts 3 are each 6. Thereby, it may be facilitated to fix each permanent magnet 22 individually.
Alternatively, as shown in fig. 2, two sub-fixing parts 33 between two adjacent permanent magnets 22 are provided at intervals. Of course, the present invention is not limited thereto, for example, two sub fixing members 33 between the adjacent two permanent magnets 22 may be connected to each other, and further alternatively, upper and lower ends of the two sub fixing members 33 between the adjacent two permanent magnets 22 may be connected to each other, that is, an upper end of each sub fixing member 33 may be connected to an upper end of the adjacent sub fixing member 33, and a lower end of each sub fixing member 33 may be connected to a lower end of the adjacent sub fixing member 33, so that the adjacent two sub fixing members 33 are formed in a square frame shape.
Specifically, the outer wall surface of the flat section 331 of the sub-fixing member 33 may be fixedly connected to the inner wall surface of the side wall 212 by welding, riveting, gluing, or the like, and the outer wall surface of the flat section 331 may be detachably connected to the inner wall surface of the side wall 212 by screwing, or the like.
More specifically, as shown in fig. 2, the bent segment 332 of each sub-fixing part 33 extends from one end of the corresponding straight segment 331 adjacent to the crankshaft 200 toward the corresponding permanent magnet 22, and the corresponding portion of the permanent magnet 22 is also configured as a slope that snugly fits with the bent segment 332. Thereby, the contact area between the permanent magnet 22 and the sub-fixing part 33 can be increased, so that the permanent magnet fixing part 3 can firmly fix the permanent magnet 22 to the rotating part 21. As a preferred embodiment, the straight section 331 and the bent section 332 may be an integrally formed elastic sheet-like structure, so that the sub-fixing part 33 having the elastic sheet-like structure can better elastically cooperate with the permanent magnet 22 to better fix the permanent magnet 22 corresponding to the limit position.
In some embodiments of the present invention, as shown in fig. 8-11, the permanent magnet fixing part 3 may be connected to the top wall 211 or the annular flange 213 in various ways. For example, in the example shown in fig. 8, the permanent magnet fixing part 3 may be formed as a separate part, and the upper end of the permanent magnet fixing part 3 may be fixed to the lower surface of the top wall 211 by welding, gluing, or the like, and for example, in the example shown in fig. 9, the permanent magnet fixing part 3 may be formed as an integrally formed part with the top wall 211. For example, in the example shown in fig. 10, the permanent magnet fixing part 3 may be formed as a separate part, and the lower end of the permanent magnet fixing part 3 may be fixed to the annular flange 213 by welding, gluing, or the like, and also, for example, in the example shown in fig. 11, the permanent magnet fixing part 3 may be formed as an integrally formed piece with the annular flange 213.
In one embodiment of the present invention, as shown in fig. 4, the length of the permanent magnet fixing part 3 is equal to the distance from the upper surface of the annular flange 213 to the lower surface of the top wall straight portion 2112, where the length of the permanent magnet fixing part 3 refers to the length of the permanent magnet fixing part 3 in the axial direction of the crankshaft 200 (the direction indicated by the arrow a in fig. 4). Thus, both ends of the permanent magnet fixing part 3 may be stopped against the lower surface (i.e., the first end surface 2113) of the top wall straight portion 2112 and the upper surface (i.e., the second end surface 2134) of the annular flange 213, respectively, thereby facilitating positioning, mounting of the permanent magnet fixing part 3 while restricting movement of the permanent magnet fixing part 3 in the axial direction.
Further, the upper end of the permanent magnet fixing part 3 may be fixed to the lower surface of the top wall 211 by welding, gluing, etc., and the lower end of the permanent magnet fixing part 3 may also be fixed to the upper surface of the annular flange 213 by welding, gluing, etc., so that the axial movement of the permanent magnet fixing part 3 is completely restricted.
In another embodiment of the present invention, as shown in fig. 3, the permanent magnet fixing part 3 includes an upper section 34 and a lower section 35, the upper section 34 being spaced apart from the lower section 35 up and down, the upper section 34 being fixed to the lower surface of the top wall 211, and the lower section 35 being fixed to the upper surface of the annular flange 213. That is, the permanent magnet 22 may be sandwiched between the upper section 34 and the lower section 35 in the up-down direction.
Alternatively, the upper section 34 and the top wall 211 may be integrally formed, and the upper section 34 and the top wall 211 may be detachably connected, for example, the upper section 34 may be connected to the top wall 211 by screwing, and of course, the upper section 34 may also be connected to the lower surface of the top wall 211 by welding, gluing, and the like.
Alternatively, the lower segment 35 and the annular flange 213 may be integrally formed, and the lower segment 35 and the annular flange 213 may be detachably connected, for example, the lower segment 35 may be connected to the annular flange 213 by screwing, and of course, the lower segment 35 may also be connected to the upper surface of the annular flange 213 by welding, gluing, or the like.
In some specific examples of the present invention, the permanent magnet fixing part 3 may be a non-magnetic conductive member, and thus, the driving motor 100 is formed as a non-salient pole type motor, thereby making the driving motor 100 less noisy.
In some embodiments of the present invention, the outer wall surface of the permanent magnet 22 and the rotating portion 21 are fixed by gluing, so that the permanent magnet 22 and the rotating portion 21 are connected more firmly and reliably. Of course, no glue layer may be provided between the permanent magnet 22 and the rotating portion 21, thereby realizing non-glued mounting of the permanent magnet 22.
Alternatively, the permanent magnet 22 is a ferrite member, thereby ensuring good permanent magnetic properties of the permanent magnet 22, and of course, the permanent magnet 22 may be other permanent magnet material, for example, the permanent magnet 22 may be a rare earth permanent magnet material.
As some alternative embodiments, the permanent magnet fixing part 3 may be an elastic part, i.e. have a certain elasticity. For example, the permanent magnet fixing part 3 may be a rubber or plastic member. Therefore, the permanent magnet fixing part 3 can elastically limit the permanent magnet 22 to form elastic fit, so that the permanent magnet 22 can be fixed better, the permanent magnet 22 is prevented from moving in the circumferential direction and the radial direction, and the reliability of the structure is improved. In addition, the elastic fit between the permanent magnet fixing part 3 and the permanent magnet 22 facilitates the assembly and processing of the rotor 2, thereby improving the manufacturing efficiency of the rotor 2.
The compressor according to the embodiment of the present invention includes the driving motor 100 for the compressor according to the above-described embodiment of the present invention. Optionally, the compressor is a rotary compressor.
According to the compressor of the embodiment of the present invention, by providing the outer rotor type driving motor 100, the leakage flux of the end of the driving motor 100 is reduced and the energy efficiency of the compressor is improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (16)
1. A drive motor for a compressor, comprising:
a stator;
the rotor is sleeved outside the stator and is suitable for being connected with a crankshaft of the compressor to drive the crankshaft to rotate, the rotor comprises a rotating part and a plurality of permanent magnets, the rotating part is of a cylindrical structure and comprises a crankshaft connecting wall and a side wall, the side wall is arranged on the lower surface of the crankshaft connecting wall, an annular flange extending inwards in the radial direction is formed at one end, far away from the crankshaft connecting wall, of the side wall, the permanent magnets are uniformly distributed on the inner side of the side wall in the circumferential direction, and the upper end face and the lower end face of each permanent magnet respectively abut against the side faces, opposite to each other, of the crankshaft connecting wall and the annular flange; and
the permanent magnet fixing part is arranged on the inner wall surface of the side wall, positions the permanent magnets on the inner side of the side wall and limits each permanent magnet in the circumferential direction and the radial direction; wherein,
the rotating portion is configured as an inverted cylindrical structure and includes a top wall and a side wall, an upper end of the side wall is provided on a lower surface of the top wall, the annular flange is provided at a lower end of the side wall, and the top wall constitutes the crankshaft connecting wall; in addition, the first and second substrates are,
the top wall comprises a top wall arc-shaped part and a top wall flat part, the top wall flat part is positioned at the outer peripheral edge of the top wall arc-shaped part, and the upper end surface of the permanent magnet abuts against the lower surface of the top wall flat part; and
the sidewall is orthogonal to the top wall straight portion and the annular flange is orthogonal to the sidewall.
2. The driving motor for the compressor according to claim 1, wherein the permanent magnet fixing parts are plural and arranged to be circumferentially staggered with the plural permanent magnets, and one permanent magnet is interposed between two adjacent permanent magnet fixing parts and circumferentially and radially limited.
3. The driving motor for the compressor according to claim 2, wherein the permanent magnet fixing part comprises:
a body portion extending in an axial direction of the crankshaft;
the protruding parts are formed on two sides of the body parts respectively, the permanent magnets are clamped between the protruding parts and the side walls through the protruding parts so as to limit the permanent magnets in the radial direction, and the permanent magnets are clamped between the two body parts through the two adjacent body parts so as to limit the permanent magnets in the circumferential direction.
4. The driving motor for the compressor as claimed in claim 3, wherein the boss is formed with a boss slope, and the permanent magnet is formed with a permanent magnet slope fitted snugly to the boss slope.
5. The driving motor for the compressor according to claim 1, wherein the permanent magnet fixing part is plural and corresponds to the plural permanent magnets, respectively, each of the permanent magnet fixing parts comprising:
the permanent magnet clamping device comprises two sub-fixing parts, wherein each sub-fixing part comprises a straight section and a bending section, the bending section is obliquely arranged relative to the straight section, the bending sections of the two sub-fixing parts clamp corresponding permanent magnets between the two bending sections and the side wall so as to radially limit the permanent magnets, and the straight sections of the two sub-fixing parts clamp corresponding permanent magnets between the two straight sections so as to circumferentially limit the permanent magnets.
6. The driving motor for the compressor as claimed in claim 5, wherein the straight section and the bent section are an integrally formed elastic sheet structure.
7. The driving motor for the compressor as claimed in claim 1, wherein an upper end of the permanent magnet fixing part is fixed to a lower surface of the top wall; or
The lower end of the permanent magnet fixing part is fixed to the upper surface of the annular flange; or
An upper end of the permanent magnet fixing part is fixed to a lower surface of the top wall and a lower end of the permanent magnet fixing part is fixed to an upper surface of the annular flange.
8. The driving motor for the compressor as claimed in claim 1, wherein the permanent magnet fixing part includes an upper section and a lower section, the upper section being spaced apart from the lower section up and down, the upper section being fixed to a lower surface of the top wall, the lower section being fixed to an upper surface of the annular flange.
9. The drive motor for the compressor of claim 8, wherein the upper section is detachably connected to the top wall; or the upper section is integral with the top wall.
10. The drive motor for the compressor according to claim 8 or 9, wherein the lower section is detachably connected to the annular flange; or the lower section is integral with the annular flange.
11. The driving motor for the compressor as claimed in claim 1, wherein the permanent magnet fixing member has a length equal to a distance from an upper surface of the annular flange to a lower surface of the top wall straight portion.
12. The drive motor for the compressor of claim 1, wherein the top wall and the annular flange are non-magnetic members.
13. The drive motor for the compressor according to claim 12, wherein the top wall and the annular flange are aluminum alloy pieces or stainless steel pieces.
14. The driving motor for the compressor according to claim 1, wherein the permanent magnet fixing member is an elastic member.
15. The driving motor for the compressor as claimed in claim 14, wherein the permanent magnet fixing part is a rubber or plastic member.
16. A compressor, characterized by comprising a drive motor for a compressor according to any one of claims 1 to 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410271489.6A CN105305758B (en) | 2014-06-17 | 2014-06-17 | Driving motor for compressor and the compressor with the driving motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410271489.6A CN105305758B (en) | 2014-06-17 | 2014-06-17 | Driving motor for compressor and the compressor with the driving motor |
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| Publication Number | Publication Date |
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| CN105305758A CN105305758A (en) | 2016-02-03 |
| CN105305758B true CN105305758B (en) | 2019-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410271489.6A Active CN105305758B (en) | 2014-06-17 | 2014-06-17 | Driving motor for compressor and the compressor with the driving motor |
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| Country | Link |
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| CN (1) | CN105305758B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102308456A (en) * | 2009-02-09 | 2012-01-04 | 株式会社捷太格特 | Electric motor and rotor |
| CN202391740U (en) * | 2011-07-22 | 2012-08-22 | 安徽美芝精密制造有限公司 | Rotary compressor |
| CN203219160U (en) * | 2013-05-10 | 2013-09-25 | 宁波普尔机电制造有限公司 | Outer motor rotor BLDC (brushless direct current) motor used for roller washing machine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2734958B1 (en) * | 1995-06-02 | 1997-07-04 | Ugimag Sa | DEVICE FOR FASTENING MAGNETS ON STATOR OR ROTOR HEAD OF ELECTRIC MOTORS |
| JP3607511B2 (en) * | 1998-10-12 | 2005-01-05 | 株式会社三協精機製作所 | Rotor and rotor assembling method and motor using the rotor |
| JP5712882B2 (en) * | 2011-09-28 | 2015-05-07 | 株式会社豊田自動織機 | Electric motor for electric compressor |
| CN203967941U (en) * | 2014-06-17 | 2014-11-26 | 广东美芝制冷设备有限公司 | For the drive motors of compressor and there is the compressor of this drive motors |
-
2014
- 2014-06-17 CN CN201410271489.6A patent/CN105305758B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102308456A (en) * | 2009-02-09 | 2012-01-04 | 株式会社捷太格特 | Electric motor and rotor |
| CN202391740U (en) * | 2011-07-22 | 2012-08-22 | 安徽美芝精密制造有限公司 | Rotary compressor |
| CN203219160U (en) * | 2013-05-10 | 2013-09-25 | 宁波普尔机电制造有限公司 | Outer motor rotor BLDC (brushless direct current) motor used for roller washing machine |
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| CN105305758A (en) | 2016-02-03 |
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