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WO2018105526A1 - Moteur de ventilateur - Google Patents

Moteur de ventilateur Download PDF

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Publication number
WO2018105526A1
WO2018105526A1 PCT/JP2017/043320 JP2017043320W WO2018105526A1 WO 2018105526 A1 WO2018105526 A1 WO 2018105526A1 JP 2017043320 W JP2017043320 W JP 2017043320W WO 2018105526 A1 WO2018105526 A1 WO 2018105526A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
rib
fan motor
ribs
motor
Prior art date
Application number
PCT/JP2017/043320
Other languages
English (en)
Japanese (ja)
Inventor
有希雄 北邑
成勝 松田
Original Assignee
日本電産株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本電産株式会社 filed Critical 日本電産株式会社
Priority to US16/461,129 priority Critical patent/US20200072241A1/en
Priority to JP2018554972A priority patent/JPWO2018105526A1/ja
Priority to CN201780064802.0A priority patent/CN109863312B/zh
Publication of WO2018105526A1 publication Critical patent/WO2018105526A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps

Definitions

  • the present invention relates to a fan motor.
  • an axial-flow fan motor that rotates an impeller using a driving force of a motor to generate an airflow in an axial direction.
  • An axial-flow fan motor is mounted on, for example, home appliances, OA equipment, transportation equipment, and the like, and is used for the purpose of cooling electronic components or circulating gas in the equipment housing.
  • a fan motor may be used for gas circulation in a server room where a large number of electronic devices are installed.
  • FIG. 18 is a perspective view showing a result of analyzing a horizontal vibration mode in a housing 5X used in a conventional fan motor.
  • FIG. 19 is a perspective view showing the result of analyzing the axial vibration mode in the housing 5Y used in the conventional fan motor.
  • the housing 5X is formed as a single member by resin injection molding or the like, and the housing 5Y is formed from two upper and lower members.
  • An object of the present invention is to provide a fan motor capable of suppressing the occurrence of sink marks, increasing the rigidity of the housing, and suppressing unpleasant vibration and noise during driving.
  • the exemplary invention of the present application is a fan motor, which includes a motor, an impeller, and a housing.
  • the motor has a stationary part having a stator and a rotating part that rotates around a central axis extending vertically.
  • the impeller has a plurality of blades and rotates together with the rotating unit.
  • the housing accommodates at least a part of the motor and the impeller inside.
  • the housing has a tubular portion, a flange portion, and one or a plurality of ribs.
  • the tubular portion is tubular, extends in the axial direction, and accommodates at least a part of the motor and the impeller inside.
  • a flange part protrudes toward the radial direction outer side from the upper end part or lower end part of a cylindrical part.
  • the rib is columnar and extends from the flange portion on the outer peripheral surface of the cylindrical portion. The rib is inclined with respect to the axial direction.
  • the rigidity of the housing is increased by forming one or more columnar ribs extending from the flange portion and inclined with respect to the axial direction on the outer peripheral surface of the cylindrical portion. Unpleasant vibration and noise at the time can be suppressed. Moreover, since the thickness of the housing in parts other than the rib can be suppressed, the occurrence of sink marks can be suppressed.
  • FIG. 1 is a longitudinal sectional view of the fan motor according to the first embodiment.
  • FIG. 2 is a partial longitudinal sectional view of the fan motor according to the first embodiment.
  • FIG. 3 is a perspective view of the housing according to the first embodiment.
  • FIG. 4 is a side view of the housing according to the first embodiment.
  • FIG. 5 is a diagram illustrating a result of analyzing the relationship between the inclination of the rib according to the first embodiment and the natural frequency of the housing.
  • FIG. 6A is a side view of the housing according to the first embodiment.
  • FIG. 6B is a side view of the housing according to the first embodiment.
  • FIG. 6C is a side view of the housing according to the first embodiment.
  • FIG. 6D is a side view of the housing according to the first embodiment.
  • FIG. 6A is a side view of the housing according to the first embodiment.
  • FIG. 6B is a side view of the housing according to the first embodiment.
  • FIG. 6C is a side view of
  • FIG. 7 is a diagram illustrating a result of analyzing the relationship between the thickness of the rib according to the first embodiment and the natural frequency of the housing.
  • FIG. 8A is a side view of the housing according to the first embodiment.
  • FIG. 8C is a side view of the housing according to the first embodiment.
  • FIG. 8E is a side view of the housing according to the first embodiment.
  • FIG. 8F is a side view of the housing according to the first embodiment.
  • FIG. 9 is a diagram illustrating a result of analyzing the relationship between the position of the rib according to the first embodiment and the natural frequency of the housing.
  • FIG. 10A is a top view of the housing according to the first embodiment.
  • FIG. 10G is a top view of the housing according to the first embodiment.
  • FIG. 10H is a top view of the housing according to the first embodiment.
  • FIG. 10I is a top view of the housing according to the first embodiment.
  • FIG. 10C is a top view of the housing according to the first embodiment.
  • FIG. 11 is a diagram illustrating a result of analyzing the relationship between the position of the rib according to the first embodiment and the natural frequency of the housing.
  • FIG. 12A is a top view of the housing according to the first embodiment.
  • FIG. 12J is a top view of the housing according to the first embodiment.
  • FIG. 12K is a top view of the housing according to the first embodiment.
  • FIG. 12L is a top view of the housing according to the first embodiment.
  • FIG. 12C is a top view of the housing according to the first embodiment.
  • FIG. 12A is a top view of the housing according to the first embodiment.
  • FIG. 12J is a top view of the housing according to the first embodiment.
  • FIG. 12K is a top view of the housing according to the
  • FIG. 13 is a longitudinal sectional view of the fan motor according to the second embodiment.
  • FIG. 14 is a perspective view of a housing according to the second embodiment.
  • FIG. 15 is a side view of the housing according to the second embodiment.
  • FIG. 16 is a diagram illustrating a result of analyzing the relationship between the position of the rib according to the second embodiment and the natural frequency of the housing.
  • FIG. 17A is a top view of the housing according to the second embodiment.
  • FIG. 17B is a top view of the housing according to the second embodiment.
  • FIG. 17C is a top view of the housing according to the second embodiment.
  • FIG. 17D is a top view of the housing according to the second embodiment.
  • FIG. 17E is a top view of the housing according to the second embodiment.
  • FIG. 17A is a top view of the housing according to the second embodiment.
  • FIG. 17B is a top view of the housing according to the second embodiment.
  • FIG. 17C is a top view of the housing according to
  • FIG. 17F is a top view of the housing according to the second embodiment.
  • FIG. 18 is a perspective view showing a result of analyzing a vibration mode in a conventional fan motor housing.
  • FIG. 19 is a perspective view showing a result of analyzing a vibration mode in a conventional fan motor housing.
  • a direction parallel to the motor central axis which will be described later, is referred to as an “axial direction”, a direction orthogonal to the motor central axis is referred to as a “radial direction”, and a direction along an arc centered on the motor central axis is referred to as “circumference”.
  • the axial direction is the vertical direction, the side from which air is taken in is referred to as “intake side” or simply “upper side”, and the side from which air is discharged is referred to as “exhaust side” or simply “lower side”.
  • intake side or simply “upper side”
  • exhaust side exhaust side from which air is discharged
  • the “upper side” and “lower side” are expressions for convenience of explanation, and are not related to the direction of gravity.
  • the fan motor according to the present invention may be used in any direction.
  • the “parallel direction” includes a substantially parallel direction.
  • the “perpendicular direction” includes a substantially orthogonal direction.
  • FIG. 1 is a longitudinal sectional view of a fan motor 10 according to the first embodiment.
  • the fan motor 10 is used, for example, as a device for supplying a cooling airflow into a room such as a home appliance such as a refrigerator or a server room in which a plurality of electronic devices are arranged.
  • the fan motor 10 may be used alone, or a plurality of fan motors 10 may be used in combination.
  • a plurality of fan motors 10 may be installed in one server room and driven simultaneously.
  • the fan motor 10 includes a motor 1, an impeller 4, and a housing 5.
  • the fan motor 10 is an axial fan that generates an airflow downward along the central axis 9.
  • air is taken in from the upper side of the fan motor 10 that is the intake side, and is sent out through the wind tunnel 50 in the housing 5 to the lower side of the fan motor 10 that is the exhaust side. .
  • FIG. 2 is a partial longitudinal sectional view of the fan motor 10 according to the first embodiment.
  • FIG. 1 will be referred to as appropriate together with FIG.
  • the motor 1 has a stationary part 2 and a rotating part 3.
  • the stationary part 2 is relatively stationary with respect to the device where the fan motor 10 is disposed.
  • the rotating part 3 is supported so as to be rotatable with respect to the stationary part 2 around a central axis 9 extending vertically.
  • the stationary portion 2 includes a stator 22, a circuit board 23, and a bearing holder 24.
  • the stator 22 is fixed to the outer peripheral surface of the bearing holder 24.
  • the stator 22 has a stator core 221 and a plurality of coils 222.
  • Stator core 221 has a plurality of teeth. Each tooth extends in the radial direction.
  • Each of the plurality of coils 222 is formed by a conductive wire wound around the teeth. The end of the conducting wire is connected to the circuit board 23.
  • the bearing holder 24 is a cylindrical member extending along the central axis 9. A lower portion of the bearing holder 24 is fixed to an inner peripheral surface of the base portion 21 described later with an adhesive, for example.
  • a bearing portion 25 is disposed on the radially inner side of the bearing holder 24.
  • a ball bearing is used for the bearing portion 25.
  • the outer ring of the bearing portion 25 is fixed to the inner peripheral surface of the bearing holder 24.
  • the inner ring of the bearing portion 25 is fixed to a shaft 31 described later. Thereby, the shaft 31 is supported rotatably with respect to the stationary part 2.
  • the motor 1 may have other types of bearings such as a slide bearing and a fluid bearing instead of the ball bearing.
  • the rotating unit 3 includes a shaft 31, a rotor holder 32, an annular member 33, and a magnet 34.
  • the shaft 31 is a columnar member disposed along the central axis 9.
  • the shaft 31 is rotatably supported by the bearing portion 25.
  • the upper end portion of the shaft 31 projects upward from the bearing holder 24.
  • the rotor holder 32 is a covered cylindrical member having a rotor lid 321 and a rotor cylinder 322.
  • the rotor lid 321 extends in a disk shape substantially perpendicular to the central axis 9.
  • the rotor cylinder portion 322 extends in the axial direction from the rotor lid portion 321 to the exhaust side.
  • metal or resin is used as the material of the rotor holder 32.
  • a central portion of the rotor lid portion 321 is fixed to the upper end portion of the shaft 31 via an annular member 33. Thereby, the rotor holder 32 rotates together with the shaft 31.
  • the rotor lid 321 is disposed on the intake side of the stationary part 2.
  • the rotor cylinder portion 322 is disposed on the radially outer side of the stator 22.
  • the magnet 34 is fixed to the inner peripheral surface of the rotor cylinder portion 322.
  • the motor 1 further has a lead wire (not shown) electrically connected to the stator 22.
  • One end of the lead wire (not shown) is connected to the circuit board 23.
  • the other end is drawn radially outward from a cylindrical portion 51 to be described later, and is connected to a power source provided outside the fan motor 10, for example.
  • the impeller 4 has a cup portion 41 and a plurality of blades 42.
  • the cup portion 41 covers the rotor lid portion 321 and the rotor cylinder portion 322 of the rotor holder 32.
  • Each blade 42 extends radially outward from the outer peripheral surface of the cup portion 41.
  • the plurality of blades 42 are arranged at substantially equal intervals in the circumferential direction. The number of blades 42 is not particularly limited.
  • the impeller 4 rotates together with the rotating unit 3.
  • FIG. 3 is a perspective view of the housing 5 according to the first embodiment.
  • FIG. 4 is a side view of the housing 5 according to the first embodiment.
  • the housing 5 is a housing that houses at least a part of the motor 1 and the impeller 4 therein. As shown in FIGS. 3 and 4, the housing 5 includes a base portion 21, a cylindrical portion 51, a flange portion 52, one or more base connection portions 53, and one or more ribs 54. The housing 5 has a rectangular solid shape that opens up and down.
  • the base portion 21 is a disk-shaped portion that is disposed below the stator 22 of the motor 1 and extends from the periphery of the bearing holder 24 toward the radially outer side. As described above, the lower portion of the bearing holder 24 is fixed to the inner peripheral surface of the base portion 21 with, for example, an adhesive.
  • the motor 1 is disposed on the upper portion of the base portion 21. The motor 1 is supported by the base portion 21.
  • the cylindrical portion 51 is a cylindrical portion that extends in the axial direction from the intake side (upper side) to the exhaust side (lower side) along the central axis 9.
  • the cylindrical portion 51 extends in a substantially cylindrical shape on the radially outer side of the impeller 4.
  • the cylindrical part 51 accommodates at least a part of the motor 1 and the impeller 4 inside.
  • the flange portion 52 is a portion that protrudes outward in the radial direction at four locations in the circumferential direction of the tubular portion 51.
  • the flange portion 52 includes an upper flange portion 521 and a lower flange portion 522.
  • the upper flange portion 521 protrudes radially outward from the upper end portion of the tubular portion 51.
  • the lower flange portion 522 protrudes radially outward from the lower end portion of the tubular portion 51.
  • the housing 5 has a rectangular shape when viewed from above.
  • the housing 5 has a rectangular shape when viewed from below. That is, the housing 5 has a rectangular solid shape that opens up and down.
  • the axial thickness of the upper flange portion 521 and the axial thickness of the lower flange portion 522 are equal to each other.
  • the rigidity of each part of the housing 5 decreases as the distance from the central axis 9 increases in the radial direction, and resonance easily occurs when the fan motor 10 is driven.
  • the radially outer end of the upper flange portion 521 has the lowest rigidity in the housing 5.
  • the end portion on the radially outer side of the lower flange portion 522 is similarly low in rigidity.
  • the base connection portion 53 is provided at the lower portion of the housing 5 as described later, the radially outer side of the lower flange portion 522 is provided.
  • the end portion of the upper flange portion 521 has higher rigidity than the end portion on the radially outer side of the upper flange portion 521.
  • the upper flange portion 521 or the lower flange portion 522 is attached to a frame body such as a device in which the fan motor 10 is installed by, for example, screwing.
  • the flange part 52 may be comprised only from the upper side flange part 521 or the lower side flange part 522.
  • the base connection portion 53 is a columnar portion that extends radially outward from at least a portion of the outer peripheral surface of the base portion 21 and is connected to at least a portion of the inner peripheral surface of the tubular portion 51. Thereby, the position of the stationary part 2 of the motor 1 with respect to the housing 5 is fixed. Further, by providing the base connecting portion 53, the lower portion and the lower flange portion 522 of the tubular portion 51 are more rigid than the upper portion and the upper flange portion 521 of the tubular portion 51.
  • One or a plurality of base connection portions 53 are provided in the lower portion of the housing 5. However, the number of the base connection parts 53 is not limited.
  • the base portion 21, the cylindrical portion 51, the flange portion 52, the one or more base connecting portions 53, and the one or more ribs 54 are formed by a single injection molding of resin. It is formed as a member. However, these may be separate members.
  • one or more ribs 54 are located on the outer peripheral surface of the tubular portion 51 and connect the upper flange portion 521 and the lower flange portion 522. This increases the rigidity of the housing 5 and increases the natural frequency of the housing 5 with respect to horizontal vibration. As a result, when the fan motor 10 is driven, the resonance amplitude at the time of resonance with the magnetic excitation can be reduced, and noise can be reduced.
  • FIG. 5 is a diagram showing a result of analyzing the relationship between the inclination of the rib 54 and the natural frequency of the housing 5 with respect to the vibration in the horizontal direction.
  • the vertical axis represents the analysis result of the natural frequency of each housing 5 based on the analysis result of the natural frequency of the housing 5 of A.
  • A is a result of analyzing the natural frequency of the housing 5 with respect to the vibration in the horizontal direction when the ribs 54 are not provided on the housing 5.
  • B is the result of the same analysis when the housing 5 is provided with ribs 54 parallel to the axial direction.
  • FIGS. 6A, 6B, 6C, and 6D show side views of housings 5 for A, B, C, and D, respectively.
  • the BD housing 5 has two ribs 54 on each of the four side surfaces of the rectangular parallelepiped solid shape.
  • C has the highest natural frequency of the housing 5 with respect to the horizontal vibration.
  • the radially inner portion of the lower flange portion 522 has higher rigidity than the radially outer portion of the upper flange portion 521.
  • the radially outer portion of the upper flange portion 521 is connected to the radially inner portion of the lower flange portion 522.
  • the rigidity of the entire housing 5 is increased, and the natural frequency is increased.
  • the thickness of the rib 54 is preferably equal to or less than the thickness of the upper flange portion 521 or the lower flange portion 522 in the axial direction. Moreover, it is desirable that the thicknesses of the plurality of ribs 54 be approximately the same.
  • FIG. 7 is a diagram illustrating a result of analyzing the relationship between the thickness of the rib 54 and the natural frequency of the housing 5 with respect to the vibration in the horizontal direction. The vertical axis represents the analysis result of the natural frequency of each housing 5 based on the analysis result of the natural frequency of the housing 5 of A. In FIG. 7, A is the result of analyzing the natural frequency of the housing 5 with respect to the vibration in the horizontal direction when the rib 54 is not provided on the housing 5.
  • FIGS. 8A, 8C, 8E, and 8F show side views of housings 5 for A, C, E, and F, respectively.
  • C has the highest natural frequency of the housing 5 with respect to the horizontal vibration.
  • the thickness of the rib 54 of C is equal to the axial thickness of the upper flange portion 521 and the lower flange portion 522 and has a sufficient size, so that the rigidity of the housing 5 as a whole is increased and the natural vibration is increased. The number is high.
  • E and F when the thickness of the rib 54 is smaller than C, the overall rigidity of the housing 5 is lower than C, and the natural frequency is lower than C.
  • the thickness of the rib 54 is further larger than the thickness of the upper flange portion 521 and the lower flange portion 522 in the axial direction, so-called sinking occurs, in which the surface of the housing 5 including the rib 54 is depressed during resin molding. There is a risk of doing. Therefore, it is desirable not to make the thickness of the rib 54 too large, but to be about the same as the axial thickness of the upper flange portion 521 and the lower flange portion 522.
  • FIG. 9 is a diagram showing a result of analyzing the relationship between the position of the rib 54 and the natural frequency of the housing 5 with respect to the vibration in the horizontal direction.
  • the vertical axis represents the analysis result of the natural frequency of each housing 5 based on the analysis result of the natural frequency of the housing 5 of A.
  • A is the result of analyzing the natural frequency of the housing 5 with respect to the vibration in the horizontal direction when the rib 54 is not provided on the housing 5.
  • G is the result of the same analysis in the case where two ribs 54 are provided on one of the four side surfaces in the rectangular solid shape of the housing 5.
  • FIGS. 10A, 10G, 10H, 10I, and 10C show top views of the respective housings 5 of A, G, H, I, and C.
  • FIG. Ribs 54 are provided at the positions of the black circles in each top view.
  • C has the highest natural frequency of the housing 5 with respect to the horizontal vibration.
  • the rigidity of the entire housing 5 is increased and the natural frequency is increased.
  • FIG. 10A, FIG. 10G, FIG. 10H, FIG. 10I, and FIG. As shown in the top view of the housing 5, two of the four side surfaces of the rectangular solid shape of the housing 5 are parallel to the X axis, and the remaining two side surfaces are parallel to the Y axis. It will be described as being arranged in (1).
  • two ribs 54 are provided on two side surfaces parallel to the X-axis direction among the four side surfaces in the rectangular solid shape of the housing 5. Therefore, in H, the natural frequency of the housing 5 with respect to the vibration in the X-axis direction in the horizontal direction (XY direction) is high.
  • two ribs 54 are provided on one side surface parallel to the X-axis direction and one side surface parallel to the Y-axis direction among the four side surfaces in the rectangular solid shape of the housing 5. Is provided. Therefore, in I, the natural frequency of the housing 5 with respect to vibrations in the X-axis direction and the Y-axis direction in the horizontal direction (XY direction) is high. As a result, I has a higher natural frequency of the housing 5 with respect to the horizontal vibration than H as a whole. That is, when two or more ribs 54 are provided on each of the two side surfaces of the four side surfaces of the rectangular parallelepiped solid shape, the ribs 54 are provided on the two side surfaces adjacent to each other, thereby preventing horizontal vibration. The natural frequency of the housing 5 can be further increased.
  • FIG. 11 is a diagram showing the result of analyzing the relationship between the position of the rib 54 and the natural frequency of the housing 5 with respect to the vibration in the horizontal direction, as in FIG.
  • the vertical axis represents the analysis result of the natural frequency of each housing 5 based on the analysis result of the natural frequency of the housing 5 of A.
  • A is the result of analyzing the natural frequency of the housing 5 with respect to the vibration in the horizontal direction when the ribs 54 are not provided on the housing 5.
  • J is a result of the same analysis in the case where one rib 54 is provided on each of the four side surfaces in the three-dimensional shape of the rectangular parallelepiped of the housing 5 and the side surface adjacent to the one side surface. is there.
  • K is the result of the same analysis when one rib 54 is provided on each of all four side surfaces of the rectangular solid shape of the housing 5.
  • L is provided with two ribs 54 on one side surface parallel to the Y-axis among the four side surfaces in the rectangular solid shape of the housing 5, and on each of the two side surfaces adjacent to the one side surface, It is the result of analyzing similarly when one rib 54 is provided.
  • C is the result of the same analysis in the case where two ribs 54 are provided on all four side surfaces of the rectangular solid shape of the housing 5.
  • FIGS. 12A, 12J, 12K, 12L, and 12C show top views of the housings A, J, K, L, and C, respectively. Ribs 54 are provided at the positions of the black circles in each top view.
  • C has the highest natural frequency of the housing 5 with respect to the horizontal vibration.
  • the rigidity of the housing 5 as a whole is increased and the natural frequency is increased.
  • H, I, K, and L are provided with a total of four ribs 54 on the four side surfaces of the rectangular solid shape of the housing 5.
  • the horizontal plane orthogonal to the axial direction is the XY plane, and as shown in the top view of the housing 5, K and L are the X-axis directions of the four side surfaces in the three-dimensional shape of the rectangular parallelepiped of the housing 5.
  • two ribs 54 are provided on the side surface parallel to the Y axis and the side surface parallel to the Y-axis direction. Therefore, the natural frequency of the housing 5 with respect to the horizontal vibration as a whole increases.
  • FIG. 13 is a longitudinal sectional view of a fan motor 10B according to the second embodiment.
  • FIG. 14 is a perspective view of a housing 5B according to the second embodiment.
  • FIG. 15 is a side view of the housing 5B according to the second embodiment.
  • the fan motor 10B has a motor 1B, an impeller 4B, and a housing 5B.
  • the motor 1B includes a stationary portion 2B having a stator 22B and a rotating portion 3B that rotates about a central axis 9B that extends vertically.
  • the stationary part 2B is relatively stationary with respect to the device or the like where the fan motor 10B is disposed.
  • the rotating part 3B is supported so as to be rotatable with respect to the stationary part 2B around a central axis 9B extending vertically.
  • the impeller 4B has a plurality of blades 42B and rotates together with the rotating portion 3B of the motor 1B.
  • the housing 5B is a housing that houses at least a part of the motor 1B and the impeller 4B. Details of the housing 5B will be described later.
  • the housing 5B has a first housing 55B and a second housing 56B.
  • the second housing 56B is fixed directly or indirectly below the first housing 55B.
  • the first housing 55B has a rectangular parallelepiped solid shape that opens up and down.
  • the first housing 55B includes a first tubular portion 511B and an upper flange portion 521B.
  • the first cylindrical portion 511B is a cylindrical portion that extends in the axial direction from the intake side (upper side) to the exhaust side (lower side) along the central axis 9B.
  • the first cylindrical portion 511B accommodates at least a part of the motor 1B and the impeller 4B inside, and surrounds the radially outer side of the impeller 4B in an annular shape.
  • the upper flange portion 521B protrudes radially outward from the upper end portion of the first tubular portion 511B at four locations in the circumferential direction of the first tubular portion 511B.
  • the second housing 56B has a rectangular parallelepiped solid shape that opens up and down.
  • the second housing 56B includes a base portion 21B, a second cylindrical portion 512B, a lower flange portion 522B, and one or a plurality of base connection portions 53B.
  • the housing 5B may have only the upper flange portion 521B or the lower flange portion 522B of the first housing 55B.
  • the base portion 21B is a disk-shaped portion that is disposed below the stator 22B of the motor 1B and expands in the radial direction.
  • a motor 1B is disposed on the upper portion of the base portion 21B.
  • the motor 1B is supported by the base portion 21B.
  • the second cylindrical portion 512B is a cylindrical portion that is disposed below the first cylindrical portion 511B and extends in the axial direction from the intake side (upper side) to the exhaust side (lower side) along the central axis 9B. .
  • the second cylindrical portion 512B accommodates at least a part of the motor 1B and the impeller 4B inside, and surrounds the radially outer side of the impeller 4B in an annular shape.
  • the second tubular portion 512B is continuously arranged below the first tubular portion 511B via a contact surface 513B with the first tubular portion 511B.
  • the lower flange portion 522B protrudes radially outward from the lower end portion of the second tubular portion 512B at four locations in the circumferential direction of the second tubular portion 512B.
  • the upper surface and outer peripheral surface of the upper flange portion 521B of the first housing 55B and the lower surface and outer peripheral surface of the lower flange portion 522B form the outer shape of the housing 5 having a rectangular parallelepiped shape that opens up and down.
  • the axial thickness of the upper flange portion 521B and the axial thickness of the lower flange portion 522B are equal to each other.
  • the base connection portion 53B is a columnar portion that extends radially outward from at least a portion of the outer peripheral surface of the base portion 21B and is connected to at least a portion of the inner peripheral surface of the second cylindrical portion 512B. Thereby, the position of the stationary part 2B of the motor 1B with respect to the housing 5B is fixed. Further, by providing the base connection portion 53B, the lower portion of the second tubular portion 512B and the lower flange portion 522B are more rigid than the upper portion of the first tubular portion 511B and the upper flange portion 521B. One or a plurality of base connection portions 53B are provided in the lower portion of the housing 5B. However, the number of base connection parts 53B is not limited.
  • the housing 5B has a columnar first rib 541B and a columnar second rib 542B.
  • the first rib 541B extends downward from the upper flange portion 521B on the outer peripheral surface of the first tubular portion 511B.
  • the second rib 542B extends upward from the lower flange portion 522B on the outer peripheral surface of the second cylindrical portion 512B.
  • One or a plurality of first ribs 541B and second ribs 542B are provided. Details of the first rib 541B and the second rib 542B will be described later.
  • the housing 5B may have a structure having only at least one of the first rib 541B and the second rib 542B.
  • the first tubular portion 511B, the upper flange portion 521B, and the one or more first ribs 541B are formed as a single member by resin injection molding. However, these may be separate members.
  • the base portion 21B, the second cylindrical portion 512B, the lower flange portion 522B, the one or more base connection portions 53B, and the one or more second ribs 542B are made of resin. It is formed as a single member by injection molding. However, these may be separate members.
  • Each of the one or more columnar first ribs 541B is located on the outer peripheral surface of the first tubular portion 511B, and extends downward from the upper flange portion 521B in a direction inclined with respect to the axial direction.
  • the one or more columnar second ribs 542B are located on the outer peripheral surface of the second tubular portion 512B, respectively, and extend upward from the lower flange portion 522B in a direction inclined with respect to the axial direction.
  • the first rib 541B is inclined in a direction away from the central axis 9B as it goes to the upper surface of the housing 5B.
  • the second rib 542B is inclined in a direction away from the central axis 9B as it goes to the lower surface of the housing 5B.
  • the rigidity of each part of the housing 5B decreases as the distance from the central axis 9B increases outward in the radial direction.
  • the radially outer end of the upper flange portion 521B and the radially outer end of the lower flange portion 522B have particularly low rigidity in the housing 5B.
  • first rib 541B and the second rib 542B are connected to a portion having a high radial inner rigidity in the housing 5B.
  • the rigidity of the housing 5B as a whole increases, and the natural frequency increases.
  • the resonance amplitude at the time of resonance with the magnetic excitation can be reduced, and noise can be reduced.
  • the thicknesses of the first rib 541B and the second rib 542B are preferably equal to or less than the axial thickness of the upper flange portion 521B or the lower flange portion 522B. Further, it is desirable that the thicknesses of the plurality of first ribs 541B and the plurality of second ribs 542B are approximately the same.
  • the rigidity of the housing 5B is enhanced while suppressing the occurrence of sink marks, and the fan motor 10B is driven. Noise can be suppressed.
  • each lower end part of 1 or several 1st rib 541B and each upper end part of 1 or several 2nd rib 542B are contact surfaces of 1st cylindrical part 511B and 2nd cylindrical part 512B. In 513B, it is desirable to arrange them consecutively. Thereby, the rigidity of the 1st rib 541B and the 2nd rib 542B becomes high, and the rigidity as the whole of the housing 5B can further be improved.
  • first ribs 541B are provided on each of two side surfaces of the four side surfaces of the rectangular parallelepiped solid shape of the first housing 55B, they are adjacent to each other. It is desirable to provide the first rib 541B on one side surface. Thereby, the natural frequency of the 1st housing 55B with respect to the vibration of a horizontal direction can be raised more. Further, when two or more second ribs 542B are provided on each of the two side surfaces of the four side surfaces of the rectangular parallelepiped solid shape of the second housing 56B, the second ribs 542B are provided on the two adjacent side surfaces. It is desirable to provide it. Thereby, the natural frequency of the 2nd housing 56B with respect to the vibration of a horizontal direction can be raised more.
  • FIG. 16 is a diagram illustrating a result of analyzing the relationship between the positions of the first rib 541B and the second rib 542B and the natural frequency of the housing 5B with respect to the vibration in the horizontal direction.
  • the vertical axis represents the analysis result of the natural frequency of each housing 5B based on the analysis result of the natural frequency of the A housing 5B.
  • A analyzes the natural frequency of the housing 5B with respect to the horizontal vibration in the case where the first rib 541B is not provided in the first housing 55B and the second rib 542B is not provided in the second housing 56B. It is the result.
  • B is the result of the same analysis in the case where two first ribs 541B are provided on each of the four side surfaces of the rectangular parallelepiped solid shape of the first housing 55B.
  • the second ribs 542B are not provided in the second housing 56B.
  • C is the result of the same analysis in the case where two second ribs 542B are provided on each of the four side surfaces of the rectangular solid shape of the second housing 56B.
  • the first housing 55B is not provided with the first rib 541B.
  • D and E are each provided with one first rib 541B on each of the four side surfaces of the rectangular parallelepiped solid shape of the first housing 55B, and one on each of the four side surfaces of the solid rectangular solid shape of the second housing 56B.
  • 17A, 17B, 17C, 17D, 17E, and 17F show top views of housings 5B of A, B, C, D, E, and F, respectively.
  • a first rib 541B is provided at a black circle in the top view of each first housing 55B.
  • a second rib 542B is provided at a position indicated by a black circle in the top view of each second housing 56B.
  • the natural frequency of the housing 5 with respect to the vibration in the horizontal direction is the highest in F.
  • two first ribs 541B are provided on all four side surfaces in the rectangular solid shape of the first housing 55B, respectively, and on all four side surfaces in the rectangular solid shape of the second housing 56B, Since each of the two second ribs 542B is provided, the rigidity of the entire housing 5B is increased and the natural frequency is increased. As a result, when driving the fan motor 10B, the resonance amplitude at the time of resonance with the magnetic excitation can be reduced, and noise can be reduced.
  • first ribs 541B are provided on each of the four side surfaces of the rectangular solid shape of the first housing 55B
  • the second ribs 542B are four shapes of the rectangular solid shape of the second housing 56B. It is desirable that two or more are provided on each side surface.
  • B When comparing the analysis results of B and C in FIG. 16, B has a higher natural frequency of the housing 5B with respect to vibration in the horizontal direction than C.
  • B since the portion on the radially outer side of the upper flange portion 521B having particularly low rigidity in the housing 5B is connected to the portion on the radially inner side of the contact surface 513B having high rigidity by the first rib 541B, the entire housing 5B is formed. The rigidity is increased and the natural frequency is increased.
  • the resonance amplitude at the time of resonance with the magnetic excitation can be reduced, and noise can be reduced.
  • first rib 541B or second rib 542B is provided on one of the first housing 55B and the second housing 56B, on each of the four side surfaces of the rectangular solid shape of the first housing 55B, It is desirable to have only the first rib 541B.
  • each rib does not necessarily have to be constant.
  • the thickness of the rib may change depending on the position in the axial direction.
  • two or more ribs may be provided on each of the four side surfaces of the solid rectangular solid shape of the housing.
  • each rib does not necessarily need to be linear.
  • each part may be different from the shape shown in each drawing of the present application. Moreover, you may combine suitably each element which appeared in said embodiment and modification in the range which does not produce inconsistency.
  • the present invention can be used for a fan motor, for example.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

Moteur de ventilateur comprenant un moteur, une roue et un carter. Le moteur comporte : une section fixe possédant un stator ; et une section rotative tournant autour d'un axe central s'étendant verticalement. La roue possède une pluralité d'aubes et tourne avec la section rotative. Le carter renferme le moteur et au moins une partie de la roue. Le carter comporte une section cylindrique, une section bride et une ou plusieurs nervures. La section cylindrique s'étend axialement et renferme le moteur et au moins une partie de la roue. La section bride fait saillie radialement vers l'extérieur à partir de l'extrémité supérieure ou de l'extrémité inférieure de la section cylindrique. Les nervures sont en forme de colonne et s'étendent sur la surface périphérique extérieure de la section cylindrique à partir de la section bride. Les nervures sont inclinées par rapport à la direction axiale.
PCT/JP2017/043320 2016-12-09 2017-12-01 Moteur de ventilateur WO2018105526A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US16/461,129 US20200072241A1 (en) 2016-12-09 2017-12-01 Fan motor
JP2018554972A JPWO2018105526A1 (ja) 2016-12-09 2017-12-01 ファンモータ
CN201780064802.0A CN109863312B (zh) 2016-12-09 2017-12-01 风扇马达

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016-239868 2016-12-09
JP2016239868 2016-12-09

Publications (1)

Publication Number Publication Date
WO2018105526A1 true WO2018105526A1 (fr) 2018-06-14

Family

ID=62491555

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2017/043320 WO2018105526A1 (fr) 2016-12-09 2017-12-01 Moteur de ventilateur

Country Status (4)

Country Link
US (1) US20200072241A1 (fr)
JP (1) JPWO2018105526A1 (fr)
CN (1) CN109863312B (fr)
WO (1) WO2018105526A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5569191U (fr) * 1978-11-07 1980-05-13
JPS61200496U (fr) * 1985-06-05 1986-12-15
JPH06640Y2 (ja) * 1987-07-30 1994-01-05 三菱電機株式会社 軸流ファンの取付装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10339297A (ja) * 1997-06-05 1998-12-22 Japan Servo Co Ltd 軸流ファンのベンチュリー
CN2345755Y (zh) * 1998-08-17 1999-10-27 刘友文 鼓风扇马达改进组接装置
CN100380000C (zh) * 2004-06-24 2008-04-09 建准电机工业股份有限公司 轴流散热风扇的壳座
CN1779276A (zh) * 2004-11-19 2006-05-31 台达电子工业股份有限公司 风扇及其扇框

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5569191U (fr) * 1978-11-07 1980-05-13
JPS61200496U (fr) * 1985-06-05 1986-12-15
JPH06640Y2 (ja) * 1987-07-30 1994-01-05 三菱電機株式会社 軸流ファンの取付装置

Also Published As

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JPWO2018105526A1 (ja) 2019-10-24
US20200072241A1 (en) 2020-03-05
CN109863312B (zh) 2021-11-09
CN109863312A (zh) 2019-06-07

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