CN107218215A - Vane type volumetric pump - Google Patents

Abstract

The invention relates to a vane-type volumetric pump, which includes a stator, a drive shaft, vanes, ferrules, a flow distribution side plate and an end cover, with the stator as the center, and a flow distribution side plate and an end cover respectively installed on both axial sides of the stator. Enclosed with the distribution side plate to form a pump chamber, the vane, ferrule and drive shaft are arranged in the pump chamber, the ferrule is installed on both sides of the drive shaft axially, and forms an annular groove with the outer cylindrical surface of the drive shaft, and one end of the vane is hinged on the On the inner wall of the stator, the other end is slidably clamped in the annular groove. In the present invention, by changing the structure of the blades and setting rolling bearings on the surface of the rotor, the sliding of the blades along the rotor groove is transformed into the swinging of the blades around the cylindrical hinge, and the sliding friction is changed into rolling friction. Due to the limitation of the annular groove, one end of the blade is abutted against the outside of the rolling bearing. The surface improves the stress on the blades, avoids the large wear and stuck phenomenon caused by the sliding of the blades of the traditional vane pump along the radial groove, and improves the strength of the drive shaft, the mechanical efficiency and the service life of the pump.

Description

vane positive displacement pump

technical field

The invention relates to the technical field of displacement pumps, in particular to a vane type displacement pump.

Background technique

In the traditional single-acting vane pump, the vanes are installed in the rotor slot, and the eccentric configuration of the rotor and the stator is used. When the rotor rotates, the vanes slide along the rotor slot by centrifugal force and are thrown out and pressed against the inner wall of the stator, thus forming several variable pumps. Sealed chamber for aspiration and discharge. The structure of the traditional vane pump causes sliding friction between the vane and the rotor groove, and there is also a large friction force between the upper end of the vane and the inner surface of the stator due to the centrifugal force, which aggravates the wear of the vane and reduces the service life of the vane pump. When the resultant direction of inertial force, friction force between vane and stator, and vane centrifugal force is not consistent with the inclination direction of the vane groove, lateral force will be generated and the vane will be stuck, which will affect the reliability and working flexibility of the pump.

Contents of the invention

In order to solve the problem that the vane of the traditional single-acting vane pump wears a lot and is easy to get stuck, the present invention provides a vane-type volumetric pump, which converts the sliding of the vane along the rotor groove into the swing of one end of the vane and the hinge of the stator and the other end around the circular hinge. Changing the sliding friction into rolling friction effectively reduces the wear and sticking problems of the vane and improves the service life of the vane pump.

The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a vane type volumetric pump, comprising:

The stator has a cylindrical cavity and two mounting surfaces located on both sides of the cylindrical cavity, a channel is opened on the stator, and the channel communicates the two mounting surfaces with the inner wall of the stator;

The drive shaft is freely rotatably arranged in the cylindrical cavity of the stator; the drive shaft includes a rotor and a rotating shaft mounted on the rotor, the rotating shaft is coaxial with the cylindrical cavity of the stator, The axis of the rotor is parallel to the axis of the cylindrical cavity of the stator without coincidence, the distance between them is eccentricity one, and the rotor is driven to rotate by the rotating shaft;

The ferrule is cylindrical. One end surface of the ferrule is provided with a circular groove. The axis of the circular groove is parallel to the axis of the outer cylindrical surface of the ferrule without overlapping. The distance is the eccentricity two, the eccentricity two is equal to the eccentricity one, the ferrule is provided in two, and the circular groove notches of the two ferrules are relatively installed on the stator and the On both sides of the rotor along the axial direction, the bottom surfaces of the two circular grooves are respectively attached to the two end surfaces of the rotor. When the drive shaft rotates, it drives the ferrule to rotate accordingly, and the circular grooves An annular groove is formed between the inner side wall of the circular groove and the outer cylindrical surface of the rotor, and the circular groove is coaxial with the rotor; the two mounting surfaces of the stator are respectively connected with the two clamps Sliding fit of the end face of the sleeve;

The distribution side plate is cylindrical, one end surface of which is provided with a groove, and a plurality of flow distribution holes are opened between the outer cylindrical surface of the distribution side plate and the side surface of the groove, passing through the two ends of the distribution side plate, The distribution side plate includes a front distribution side plate and a rear distribution side plate, a liquid discharge valve is provided in the distribution hole of the front distribution side plate, and a liquid suction valve is provided in the distribution hole of the rear distribution side plate, The center of the front distributing side plate and/or the rear distributing side plate is also provided with a shaft hole 2 matched with the rotating shaft; the two recesses of the front distributing side plate and the rear distributing side plate The slot openings are installed oppositely on both sides of the stator in the axial direction, enclosing the stator to form a pump chamber, and the pump chamber communicates with the distribution hole through the passage;

A plurality of vanes, one end of which is hinged on the inner wall of the stator along the axial direction of the stator, and can rotate relative to the stator, and the other end of the vanes is provided with a cylindrical trunnion, and the diameter of the trunnion is the same as The radial widths of the annular grooves are equal, and the trunnions are inserted into the annular grooves and can swing with the rotation of the annular grooves;

A working chamber is formed between two adjacent blades, the inner wall of the stator, the outer cylindrical surface of the rotor and the two ferrules, and the working chamber communicates with the allocated flow hole through the passage;

The end cover, the fixing device is on the two outer sides of the axial direction of the pump chamber, including the front end cover and the rear end cover, and the front end cover and/or the rear end cover are also provided with a shaft hole three; the shaft is connected from the shaft hole three Passing out, a liquid discharge channel and a liquid suction channel are respectively arranged on the front end cover and the rear end cover, and the liquid discharge channel and the liquid suction channel respectively pass through the distribution hole and the channel and the working chamber connection;

When the rotating shaft drives the rotor to rotate, the radial distance between the outer cylindrical surface of the rotor and the inner wall of the stator changes periodically, and the rotor drives the blades to swing around the hinges with the inner wall of the stator.

Further, the inner wall of the stator is provided with a cylindrical groove in the axial direction, and one end of the blade is provided with a cylindrical hinge matched with the cylindrical groove, and the cylindrical hinge is inserted into the cylindrical groove so that the blade and the The stator forms a hinge.

Further, the inner wall of the stator is provided with a cylindrical hinge in the axial direction, and one end of the blade is provided with a cylindrical groove matching with the cylindrical hinge, and the cylindrical hinge is inserted into the cylindrical groove so that the blade and the The stator forms a hinge.

Further, at least one of the two ferrules is provided with a shaft hole on the end surface, and the rotating shaft is inserted into the shaft hole.

Further, the shaft and the first shaft hole are connected by a transition fit or an interference fit, or a key connection or a spline connection.

Further, the external device of the rotor has a rolling bearing, and the blade abuts on the outer ring of the rolling bearing.

Further, the liquid suction channel is arranged on the rear end cover, and it includes a connected liquid suction port and a low-pressure oil chamber, and the liquid suction port is a through hole opened in the radial direction of the rear end cover, so The low-pressure oil chamber is an annular groove opened on the end face of the rear end cover, and the liquid suction port communicates with the distribution hole through the low-pressure oil chamber; the liquid discharge channel is arranged on the front end cover, and it It includes a connected drain port and a high pressure oil chamber, the drain port is a through hole opened in the radial direction of the front end cover, the high pressure oil chamber is an annular groove opened on the end face of the front end cover, the The liquid discharge port communicates with the distribution hole through the high-pressure oil chamber.

Further, the rolling bearing is a needle bearing.

Further, the channel simultaneously communicates the two mounting surfaces of the stator with the inner wall of the stator.

Further, the channel includes channel one and channel two, the channel one connects the inner wall of the stator with one mounting surface of the stator, and the channel two connects the inner wall of the stator with the other mounting surface of the stator The mounting surface is connected.

The beneficial effect of the present invention is that in the present invention, by changing the blade structure, a rolling bearing is arranged on the surface of the rotor, the sliding of the blade along the rotor groove is converted into the swing of the blade around the cylindrical hinge, and the sliding friction is changed into rolling friction. At the same time, the ferrule and the rolling bearing The annular groove between the vanes abuts one end of the vane on the outer surface of the rolling bearing, which improves the stress on the vane, avoids the large wear and stuck phenomenon caused by the vane sliding along the radial groove in the traditional vane pump, and improves the strength of the drive shaft and the durability of the pump. Mechanical efficiency and service life, good sealing effect.

Description of drawings

Fig. 1 is the overall structural representation of the present invention;

Fig. 2 is a sectional view at A-A place in Fig. 1;

Fig. 3 is a schematic view of the stator structure of the present invention;

Fig. 4 is a schematic view of the blade structure of the present invention;

Fig. 5 is a schematic structural view of the drive shaft of the present invention;

Fig. 6 is a schematic diagram of the ferrule structure of the present invention;

Fig. 7 is a schematic structural diagram of the front panel of the front distribution side of the present invention;

Fig. 8 is a schematic structural view of the back panel of the front distribution side of the present invention;

Fig. 9 is a schematic diagram of the front structure of the rear distribution side plate of the present invention;

Fig. 10 is a schematic diagram of the back structure of the rear distribution side plate of the present invention;

Fig. 11 is a schematic structural view of the front end cover of the present invention;

Fig. 12 is a schematic diagram of the structure of the rear end cover of the present invention;

1. Rear end cover, 2. Rear distribution side plate, 3. Stator, 4. Blade, 5. Front distribution side plate, 6. Front end cover; 7. Ferrule; 8. Rotor; 9. Rotating shaft; 10. Rolling bearing, 11. Liquid suction port, 12 Low-pressure oil chamber, 21. Groove, 22. Distribution hole, 23. Liquid discharge valve, 24. Liquid suction valve, 31. Cylindrical groove, 32. Channel, 41. Cylindrical hinge, 42. Ear Shaft, 51. shaft hole two, 61. drain port, 62. high pressure oil chamber, 63. shaft hole three, 71. shaft hole one, 72. circular groove.

detailed description

The present invention will be described in detail below with reference to the accompanying drawings and examples. The principles and features of the present invention will be described below in conjunction with the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments can be combined without conflict. The examples given are only for explaining the present invention, not for limiting the scope of the present invention.

Please refer to Figure 1-2, Figure 1-2 schematically shows the structure of an embodiment of the single-acting vane 4-type volumetric pump in the present invention, including a stator 3, a drive shaft, vanes 4, ferrules 7, and a flow distribution side plate and end caps.

With the stator 3 as the center, a flow distribution side plate and an end cover are respectively installed on both axial sides of the stator 3. The stator 3 and the flow distribution side plate are enclosed to form a pump chamber. The blades 4, the ferrule 7 and the drive shaft are all arranged in the pump chamber. The sleeve 7 is installed on both sides of the drive shaft axially, connected with the drive shaft and can rotate with the drive shaft, an annular groove is formed between the ferrule 7 and the outer cylindrical surface of the drive shaft, one end of the blade 4 is hinged on the inner wall of the stator 3, and the other end is clamped installed in the ring groove.

Referring to Fig. 3, the stator 3 is cylindrical and has a coaxial cylindrical cavity, and two mounting surfaces located on both sides of the cylindrical cavity, and a plurality of cylindrical grooves 31 are evenly arranged on the inner wall along the axial direction. , used to hinge with the blade 4. A channel 32 is opened on the stator, and the channel 32 communicates with the two mounting surfaces of the stator 3 and the inner wall of the stator 3 .

Fig. 4 schematically shows the structure of the blade 4, one end of the blade 4 is provided with a cylindrical hinge 41 matched with the cylindrical groove 31, by inserting the cylindrical hinge 41 in the cylindrical groove 31 of the inner wall of the stator 3, the blade 4 Form a hinge with the stator 3; the other end of the blade 4 is provided with a cylindrical trunnion 42, the trunnion 42 is inserted into the annular groove and abuts against the outer cylindrical surface of the rotor 8, and can swing with the rotation of the annular groove , preferably the diameter of the trunnion 42 is equal to the radial width of the annular groove.

The hinge between the stator 3 and the blade 4 can also be provided with a cylindrical hinge axially on the inner wall of the stator 3, and at the same time, one end of the blade 4 is provided with a cylindrical groove 31 matched with the cylindrical hinge 41, and the cylindrical hinge 41 is inserted into the hinge. Installed in the cylindrical groove 31, so as to realize the hinge connection between the blade 4 and the stator 3 .

The drive shaft is freely rotatably arranged in the cylindrical cavity of the stator 3, see Fig. 5, the drive shaft includes a rotating shaft 9 and a rotor 8 fixedly mounted on the rotating shaft 9, the rotor 8 is driven by the rotating shaft 9 and rotates thereupon, as shown in Fig. 1, the rotating shaft 9 is arranged coaxially with the cylindrical space of the stator 3, the axis of the rotating shaft 9 is parallel to the axis of the rotor 8 without overlapping, the distance between the two is eccentricity one, and the rotor 8 rotates with the rotation of the rotating shaft 9 When rotating in the pump chamber, that is, the rotor 8 rotates around the stator 3 axis. During this process, the radial distance between the outer cylindrical surface of the rotor 8 and the inner wall of the stator 3 changes periodically as the rotating shaft 9 rotates.

As shown in Figure 6, the ferrule 7 is cylindrical, and one end surface of the ferrule 7 is provided with a circular groove 72. The diameter of the circular groove 72 is larger than the diameter of the rotor 8, and the axis of the circular groove 72 is in line with the clamp. The axes of the cover 7 are parallel and not coincident, the distance between the two is called eccentricity two, and eccentricity two is equal to eccentricity one. The notches of the circular grooves 72 of the two ferrules 7 are oppositely installed on both sides of the stator 3 and the rotor 8 in the axial direction, and the end faces of the two ferrules 7 are provided with a shaft hole 71 through which the rotating shaft 9 can pass. , the shaft hole 71 is coaxial with the outer cylindrical surface of the ferrule 7, and the two ends of the rotating shaft 9 are respectively inserted in the shaft hole 71. The bottom surfaces of the two circular grooves 72 are attached to the two end surfaces of the rotor 8 respectively. When the drive shaft rotates, the ferrule 7 is driven to rotate accordingly. An annular groove is formed, while the circular groove 72 is coaxial with the rotor 8 . The two mounting surfaces of the stator 3 are slidably matched with the end faces of the ferrule 7, so that the ferrule 7 and the stator 3 can rotate relative to each other, and at the same time have better sealing performance.

In this solution, the ferrule 7 can be installed on the rotor 8 (such as through the slot and bayonet fitting), and the ferrule 7 is driven by the rotor 8 to rotate. At this time, a transition fit is adopted between the rotating shaft 9 and the shaft hole 71; Or by installing ferrule 7 on the rotating shaft, for example, adopt interference fit connection between rotating shaft 9 and shaft hole one 71, or adopt key connection or spline connection, and ferrule 7 is driven by rotating shaft 9 to rotate; or above-mentioned two The two schemes are combined, and the ferrule 7 is driven to rotate by the rotor 8 and the rotating shaft 9 at the same time.

As shown in Figure 7-10, the distribution side plate is cylindrical, and one end surface is provided with a groove 21 that matches the ferrule 7, and there are multiple distribution channels between the outer cylindrical surface of the distribution side plate and the side of the groove 21. The hole 22, the flow distribution hole 22 is opened along the axial direction of the flow distribution side plate, and runs through the two end surfaces of the flow distribution side plate. The distribution side plate includes the front distribution side plate 5 (as shown in Figure 7-8) and the rear distribution side plate 2 (as shown in Figure 9-10). The center of the front distribution side plate 5 is also provided with a shaft hole 2 that matches the rotating shaft 9. 51. A discharge valve 23 is provided in the distribution hole 22 of the front distribution side plate 5, and a liquid suction valve 24 is provided in the distribution hole 22 of the rear distribution side plate 2; the liquid suction valve 24 or the liquid discharge valve 23 can be a one-way valve or a combination valve; the front distribution side plate 5 and the groove 21 of the rear distribution side plate 2 are installed on both sides of the stator 3 in the axial direction, and the rotating shaft 9 is inserted in the shaft hole 2 51 , the two distribution side plates are surrounded by the stator 3 to form a pump chamber, and the pump chamber communicates with the distribution hole (22) through the channel (32).

In the above solution, the second shaft hole may also be provided on the rear distribution side plate.

A sealed working cavity is formed between two adjacent blades 4, the inner wall of the stator 3, the outer cylindrical surface of the rotor 8 and the two ferrules 7, and the working cavity is connected to the front distribution side plate 5 and the rear distribution side plate through the passage (32) respectively. The distribution hole 22 on the 2 communicates.

Figure 11-12 schematically shows the structure of the end cover. The end cover fixing device is on the two axial outer sides of the pump chamber enclosed by the stator 3 and the distribution plate. The end cover includes the front end cover 6 (as shown in Figure 11) And rear end cover 1 (as Fig. 12), front end cover 6 centers also offer the shaft hole 3 63 that cooperates with rotating shaft 9, and rotating shaft 9 passes through after shaft hole 3 63 and is connected with power mechanism. Also can offer shaft hole three 63 on the front end cover and the rear end cover respectively.

The front end cover 6 is fixedly connected with the front distribution plate, and the rear end cover 1 is fixedly connected with the rear distribution plate. The front end cover 6 is provided with a liquid discharge channel, and the liquid discharge channel includes a liquid discharge port 61 and a high-pressure oil chamber 62 which are connected. The annular groove on the axial end surface of the front end cover 6, the liquid discharge port 61 communicates with the flow distribution hole 22 through the high-pressure oil chamber 62; The oil chamber, the liquid suction port 11 is a through hole opened in the radial direction of the rear end cover 1, and the low-pressure oil chamber is an annular groove opened on the axial end surface of the rear end cover 1. The liquid suction port 11 passes through the low-pressure oil chamber and the flow distribution The hole 22 communicates.

As shown in Figure 1, the channel 32 can be designed in a shape similar to a three-way pipe, one opening of which is opened on the inner wall of the stator 3, and the other two openings are respectively opened on the two mounting surfaces of the stator 3, thereby simultaneously connecting the stator 3 The two installation surfaces communicate with the inner wall of the stator 3, and a channel 32 is provided between each adjacent vane 4, so that the working chamber can communicate with the liquid suction channel and the liquid discharge channel respectively.

Passage 32 can also be designed to comprise passage one and passage two, and the opening of passage one end is offered on the inner wall of stator 3, and the opening of the other end is offered on a mounting surface of stator 3, and the inner wall of stator 3 is connected with this mounting surface. The opening at one end of channel two is opened on the inner wall of the stator 3, and the opening at the other end is opened on another mounting surface of the stator 3, so that the inner wall of the stator 3 is communicated with the mounting surface. Channel 1 and channel 2 are arranged between two adjacent blades 4, so that the working chamber can communicate with the liquid suction channel and the liquid discharge channel respectively.

Generally speaking, for the convenience of processing and manufacturing, both the liquid suction port 11 and the liquid discharge port 61 are designed as round holes with the same hole diameter, but in order to reduce the resistance at the liquid suction port and ensure smooth oil suction, the liquid suction port 11 can be The diameter of the aperture increases, making its flow cross-sectional area greater than that of the drain port 61.

When the rotating shaft 9 rotates, it drives the rotor 8 and the ferrule 7 to rotate at the same time. Since the rotor 8 and the stator 3 are eccentrically arranged, the radial distance between the outer cylindrical surface of the rotor 8 and the inner wall of the stator 3 changes periodically with the rotation of the rotating shaft 9, thereby driving The blades 4 swing around the cylindrical hinge 41 along the outer cylindrical surface of the rotor 8, which also causes the adjacent blades 4 to produce different instantaneous deflection angles around their respective cylindrical hinges 41, thereby causing the volume of each working chamber to change; when the volume of the working chamber increases When it is large, negative pressure is formed inside, so that the liquid suction valve 24 in the distribution hole 22 connected to the liquid suction channel in the working chamber is opened, and the working chamber is communicated with the liquid suction channel, and the liquid is sucked in; when the volume of the working chamber decreases hour, the pressure in the working chamber increases, so that the drain valve 23 in the distributing hole 22 connected to the drain passage in the working chamber is opened, the working chamber is communicated with the drain passage, and the liquid is discharged; the rotor 8 Every time the shaft rotates, the volume of each working chamber increases and decreases once, so as to realize one suction and one discharge.

The trunnion 42 of the blade 4 rolls along the annular groove, which can bear a part of the lateral force of the blade 4, improves the stress situation of the lower end of the blade 4, and reduces the wear of the lower end of the blade 4 and the outer ring of the bearing. At the same time, the annular groove restrains the blade 4. When the trunnion 42 of the blade 4 rolls along the annular groove, the annular groove exerts a counter force on the blade 4, so that when the rotor 8 rotates, the lower end of the blade 4 can touch the needle bearing. The outer ring avoids the large wear between the vane 4 and the stator 3 caused by the excessive centrifugal force of the traditional vane 4 pump, improves the working reliability and prolongs the service life of the pump.

Since the lower end of the vane 4 is constrained by the annular groove, it is always in contact with the rotor 8, and the centrifugal force is no longer needed to throw the vane 4 out, so it can work in a lower speed range, thereby widening the speed range of the vane 4 pump.

Preferably, a rolling bearing 10 can be installed on the outer cylindrical surface of the rotor 8, preferably the rolling bearing 10 is transitionally fitted with the outer cylindrical surface of the rotor 8, and the blade 4 abuts on the outer ring of the rolling bearing 10 through the trunnion 42, and can rotate with the annular groove And swing. At this time, a sealed working cavity is formed between two adjacent blades 4 , the inner wall of the stator 3 , the outer cylindrical surface of the rotor 8 and the two ferrules 7 . Due to the eccentric arrangement of the rotor 8 and the stator 3, when the rotor 8 rotates around the axis of the stator 3, the rolling bearing 10 in contact with the outer cylindrical surface of the rotor 8 rotates together, and the outer cylindrical surface of the rotor 8, the outer ring of the rolling bearing 10 and the annular groove of the stator 3 The radial distance of the inner wall changes periodically with the rotation of the rotating shaft 9, thereby driving the blade 4 to swing around the cylindrical hinge 41 along the outer cylindrical surface of the rolling bearing 10, thereby causing the volume of each working chamber to change; when the volume of the working chamber increases, its Negative pressure is formed inside, so that the liquid suction valve 24 in the distribution hole 22 connected to the liquid suction channel in the working chamber is opened, and the working chamber is communicated with the liquid suction channel, and the liquid is sucked in; when the volume of the working chamber decreases, the The pressure in the working chamber increases, so that the discharge valve 23 in the distribution hole 22 connected to the discharge channel in the working chamber is opened, the working chamber is connected with the discharge channel, and the liquid is discharged; With one turn, the volume of each working chamber increases and decreases once, so as to realize one suction and one discharge.

The above preferred solution converts the rolling friction between the blade 4 and the outer cylindrical surface of the rotor 8 into the rolling friction between the rolling body and the outer ring and/or inner ring of the bearing, further reducing the friction force on the blade 4 and improving the performance of the blade. 4 service life.

The above-mentioned rolling bearing 10 is preferably a needle roller bearing. The needle roller bearing has a compact radial structure. When its inner diameter size and load capacity are the same as other types of bearings, its outer diameter is the smallest and occupies the least space in the annular groove.

In the embodiment shown in Fig. 1, a rolling bearing 10 is installed on the drive shaft. In practical applications, according to different requirements, multiple rolling bearings 10 may also be arranged on the drive shaft.

In the present invention, by changing the structure of the blade and installing a rolling bearing on the surface of the rotor, the sliding of the blade along the rotor groove is transformed into the swing of the blade around the cylindrical hinge, and the sliding friction is changed into rolling friction. One end abuts against the outer surface of the rolling bearing, which improves the stress on the blades, avoids the large wear and stuck phenomenon caused by the sliding of the blades of the traditional vane pump along the radial groove, improves the strength of the drive shaft, the mechanical efficiency and service life of the pump, and seals The effect is good.

In describing the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom", "inner", "outer", and "circumferential" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying References to devices or elements must have a particular orientation, be constructed, and operate in a particular orientation and therefore should not be construed as limiting the invention.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature may be in direct contact with the second feature through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (10)

1. a kind of vane type volumetric pump, it is characterised in that including：

Stator（3）, two mounting surfaces with tubular cavity and positioned at the tubular cavity both sides are offered on the stator logical Road（32）, the passage（32）Two mounting surfaces of connection and the stator（3）Inwall；

Drive shaft, it is rotatable to be arranged on the stator（3）Tubular cavity in；The drive shaft includes rotor（8）With Installed in the rotor（8）On rotating shaft（9）, the rotating shaft（9）With the stator（3）Tubular cavity it is coaxial, the rotor （8）Axis and the stator（3）The diameter parallel of tubular cavity and it is misaligned, distance between the two is eccentric throw one, institute State rotor（8）By the rotating shaft（9）Drive and rotate；

Cutting ferrule（7）, it is cylindric, the cutting ferrule（7）An end face on offer circular groove（72）, the circular groove （72）Axis and the cutting ferrule（7）The diameter parallel of external cylindrical surface and it is misaligned, distance between the two is eccentric throw two, institute State eccentric throw two equal with the eccentric throw one, the cutting ferrule（7）It is set to two, two cutting ferrules（7）Circular groove （72）Notch relatively device in the stator（3）And the rotor（8）Both sides in axial direction, two circular grooves （72）Bottom surface respectively with the rotor（8）Two end faces laminating, the cutting ferrule is driven during the drive shaft turns（7）Therewith Rotate, the circular groove（72）Madial wall and the rotor（8）External cylindrical surface between form annular groove, the circle is recessed Groove（72）With the rotor（8）Coaxially；The stator（3）Two mounting surfaces respectively with two cutting ferrules（7）End Face is slidably matched；

Flow side plate, is cylindric, one end face opens up fluted（21）, the flow side plate external cylindrical surface and the groove （21）Side between offer multiple assignment holes for running through the flow side plate both ends of the surface（22）, flow side plate matches somebody with somebody before including Flow side plate（5）With rear flow side plate（2）, the preceding flow side plate（5）The assignment hole（22）It is interior to be provided with tapping valve（23）, institute State rear flow side plate（2）The assignment hole（22）It is interior to be provided with liquid sucting valve（24）, the preceding flow side plate（5）And/or it is described after Flow side plate（2）Center be further opened with and the rotating shaft（9）The axis hole two being engaged（51）；The preceding flow side plate（5）With The rear flow side plate（2）Two grooves（21）Notch is relatively arranged on the stator（3）The both sides of axial direction, with institute State stator（3）Enclose to form pump chamber, the pump chamber passes through the passage（32）With the assignment hole（22）Connection；

Multiple blades（4）, its one end is along the stator（3）Axial direction be hinged on the stator（3）Inwall on, and can be with respect to institute State stator（3）Rotate, the blade（4）The other end be provided with cylindrical gudgeon（42）, the gudgeon（42）Diameter and institute The width radially for stating annular groove is equal, the gudgeon（42）Insert in the annular groove and can be with turn of the annular groove Move and swing；

Two adjacent blades（4）, stator（3）Inwall, rotor（8）External cylindrical surface and two cutting ferrules（7）Between form working chamber, institute State working chamber and pass through the passage（32）With institute's assignment hole（22）Connection；

End cap, fixing device is in the pump chamber axially two outside, including drive end bearing bracket（6）And rear end cap（1）, the drive end bearing bracket（6） And/or rear end cap（1）On be further opened with axis hole three（63）；The rotating shaft（9）From the axis hole three（63）Pass, in the front end Lid（6）With the rear end cap（1）It is upper that apocenosis passage and imbibition passage, the apocenosis passage and the imbibition passage point are set respectively The assignment hole is not passed sequentially through（22）And the passage（32）Connected with the working chamber；

The rotating shaft（9）Drive the rotor（8）During rotation, the rotor（8）External cylindrical surface and the stator（3）Inwall Radial distance generating period is sexually revised, the rotor（8）Drive the blade（4）Around with stator（3）The articulated section of inwall is swung.

2. vane type volumetric pump according to claim 1, it is characterised in that the stator（3）Inwall on set vertically It is equipped with cylinder groove（31）, the blade（4）One end be provided with and cylinder groove（31）The cylinder hinge being engaged（41）, the cylinder Hinge（41）It is inserted into cylinder groove（31）It is interior, make the blade（4）With the stator（3）Formation is hinged.

3. vane type volumetric pump according to claim 1, it is characterised in that the stator（3）Inwall on set vertically It is equipped with cylinder hinge（41）, the blade（4）One end be provided with and cylinder cut with scissors（41）The cylinder groove being engaged（31）, the cylinder Hinge（41）It is inserted into cylinder groove（31）It is interior, make the blade（4）With the stator（3）Formation is hinged.

4. vane type volumetric pump according to claim 1, it is characterised in that two cutting ferrules（7）In at least one End face on offer axis hole（71）, the rotating shaft（9）It is inserted into the axis hole（71）It is interior.

5. vane type volumetric pump according to claim 4, it is characterised in that the rotating shaft（9）With axis hole one（71）Between Using interference fits or interference fit connection, or using key connection or spline connection.

6. vane type volumetric pump according to claim 1, it is characterised in that the rotor（8）External device (ED) has the axis of rolling Hold（10）, the blade（4）It is connected to the rolling bearing（10）Outer ring on.

7. vane type volumetric pump according to claim 1, it is characterised in that the imbibition passage is arranged on the rear end cap （1）On, it includes the liquid sucting port being connected（11）With low pressure oil pocket（12）, the liquid sucting port（11）To be opened in the rear end cap （1）Through hole radially, the low pressure oil pocket（12）To be opened in the rear end cap（1）Annular groove on end face, the imbibition Mouthful（11）Pass through the low pressure oil pocket（12）With the assignment hole（22）Connection；The apocenosis passage is arranged on the drive end bearing bracket （6）On, it includes the leakage fluid dram being connected（61）And high-voltage oil cavity（62）, the leakage fluid dram（61）To be opened in the drive end bearing bracket （6）Through hole radially, the high-voltage oil cavity（62）To be opened in the drive end bearing bracket（6）Annular groove on end face, the discharge opeing Mouthful（61）Pass through the high-voltage oil cavity（62）With the assignment hole（22）Connection.

8. vane type volumetric pump according to claim 6, it is characterised in that the rolling bearing（10）For needle bearing.

9. vane type volumetric pump according to claim 1, it is characterised in that the passage（32）Simultaneously by the stator （3）Two mounting surfaces and the stator（3）Inwall connection.

10. according to the vane type volumetric pump described in claim 1, it is characterised in that the passage（32）Including passage one and passage Two, the passage one is by the stator（3）Inwall and the stator（3）The connection of a mounting surface, the passage two is by institute State stator（3）Inwall and the stator（3）Another mounting surface connection.