Variable displacement vane-type rotor pump

Abstract

The application provides a variable displacement vane rotor pump, comprising a stator, a rotor body and a sliding piece, a plurality of vanes abutting against the inner wall of the stator to form a plurality of pump cavities, wherein the rotor body is arranged in the stator and has a plurality of vanes, the rotor body, two adjacent vanes and the stator enclose to form a pump cavity, the sliding piece is arranged on the outer circumferential surface of the rotor body and slides along the radial direction of the rotor body, the sliding piece has a guide structure extending along the axial direction of the rotor body, a control piece is coaxially arranged on the axial end surface of the rotor body, the control piece is provided with a guide hole matched with the extension end of the guide structure, the guide hole is an arc-shaped hole, and the long axis of the arc-shaped hole is arranged at an angle with any radial line of the rotor body. The variable displacement vane rotor pump can solve the problems of insufficient reliability of the existing variable displacement vane pump and large flow fluctuation in the displacement change process.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of rotor pumps, and more particularly to a variable displacement vane rotor pump. BACKGROUND

[0002] Pumps are mainly divided into gear pumps, rotor pumps, vane pumps, screw pumps, and plunger pumps. Among them, gear pumps and rotor pumps are mostly of fixed displacement due to the particularity of their structure, and it is not easy to achieve variable displacement. Therefore, variable displacement is mostly achieved by vane pumps due to the flexibility of their structure.

[0003] In the prior art, variable displacement vane pumps are mainly divided into two types: mechanical first-stage pressure feedback displacement adjustment pumps and second-stage solenoid valve controlled displacement adjustment pumps. There are also a few second-stage variable displacement pumps in the form of double springs. First-stage variable displacement pumps can achieve first-stage adjustable displacement. Second-stage solenoid valve controlled variable displacement pumps can achieve two-stage adjustable displacement, and have higher control precision and efficiency than first-stage variable displacement pumps.

[0004] The main structure of a first-stage adjustable or second-stage solenoid valve adjustable variable displacement vane pump mainly includes a pump body, a rotor, and a stator. The rotor and the stator are separated by vanes into several volume chambers. The volume of each volume chamber changes due to the rotation of the vanes driven by the rotor. At the same time, elastic elements such as springs are provided in the pump body to elastically push the stator. The elastic elements elastically push the stator to have the maximum eccentricity between the stator and the rotor in the natural state. When the internal pressure of the engine increases with the rotation of the rotor, the pressure is fed back to the stator, allowing the stator to gradually overcome the pushing of the elastic elements and move relative to the rotor based on the rotation, thereby gradually reducing the eccentricity between the stator and the rotor, and further changing the pumped oil volume.

[0005] Based on the above existing mechanism, the existing mechanical variable displacement pump has the problem of excessive rotor speed and power waste at high power. The solenoid valve controlled variable displacement pump can solve the above problem of power waste, but due to the increase in parts, the cost rises greatly, the system complexity increases, and the reliability decreases. The technical ideas of the above two variable displacement pumps are to change the relative position between the stator and the rotor by setting an elastic feedback mechanism. The elastic feedback mechanism will produce reverse displacement due to the rotation of the rotor and the flow of the liquid in the stator, thereby causing fluctuations in the liquid flow pumped by the variable displacement pump, affecting the smoothness of the variable displacement pump, and greatly affecting the service life of the rotor pump. SUMMARY

[0006] The present application aims to provide a variable displacement vane rotor pump to solve the problems of excessive complexity of the structure of the existing variable displacement vane pump and fluctuations during operation.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a variable displacement vane rotor pump, comprising:

[0008] stator;

[0009] The rotor body is located inside the stator, and the rotor body is provided with multiple blades along its circumference. The blades are slidably adapted to the rotor body, and two adjacent blades, the stator, and the rotor body enclose a pump cavity.

[0010] A sliding member is slidably inserted into the outer peripheral surface of the rotor body along the radial direction of the rotor body and located between two adjacent blades. The protruding end of the sliding member extends into the pump cavity. The sliding member has a guide structure extending axially along the rotor body. The shaft end face of the rotor body has a clearance hole that slides and adapts to the guide structure, and the extension direction of the clearance hole is parallel to the radial direction of the rotor body. The guide structure passes through and extends out of the clearance hole.

[0011] The control component is coaxially disposed on the shaft end face of the rotor body. The control component has a locking state that is fixed relative to the rotor body, and an adjustment state that rotates coaxially relative to the rotor body. The control component has a guide hole that matches the protruding end of the guide structure. The guide hole is an arc-shaped hole, and its major axis is set at an angle to any radial line of the rotor body.

[0012] In one possible implementation, the variable displacement vane rotor pump further includes a connecting shaft coaxially fixed to the rotor body;

[0013] The connecting shaft is used to assemble the rotor body into the stator, and the axes of the control component and the rotor body are both coincident with the axis of the connecting shaft;

[0014] The control component includes a control disk and a connecting sleeve. The connecting sleeve is coaxially fixed to the side of the control disk away from the rotor body. The connecting shaft passes through the control disk and is inserted into the connecting sleeve. The control disk has the guide hole.

[0015] A guide protrusion is formed on the inner wall of the connecting sleeve. Corresponding to the guide protrusion, a first guide groove and a second guide groove are formed on the outer peripheral surface of the connecting shaft to slide and adapt to the guide protrusion. The first guide groove and the second guide groove are sequentially connected in the direction toward the rotor body. The first guide groove is opened on the outer peripheral surface of the connecting shaft along the axial direction of the connecting shaft, and the second guide groove is opened on the outer peripheral surface of the connecting shaft around the axis of the connecting shaft.

[0016] In a possible implementation manner,

[0017] The first guide groove is a plurality of and is uniformly arranged on the outer circumferential surface of the connecting shaft; and the second guide groove comprises an annular groove and a spiral groove which are sequentially communicated in the direction towards the rotor body.

[0018] The annular groove is arranged in communication with the first guide groove, and the annular groove is continuously distributed on the outer circumferential surface of the connecting shaft in the axial direction of the connecting shaft; the number of the spiral grooves is a plurality, and the spiral grooves are distributed on the outer circumferential surface of the connecting shaft in the circumferential direction of the connecting shaft; and the midlines of the spiral grooves and the axis of the connecting shaft are mutually overlapped.

[0019] In a possible implementation manner, the number of the spiral grooves is two, the two spiral grooves are symmetrically arranged with the midline of the first guide groove as the symmetric axis, are mirror-symmetric in the shape of "V", and are in communication with each other.

[0020] In a possible implementation manner, a recess is formed on the rotor body corresponding to the sliding piece, and the recess is located between two adjacent blades.

[0021] In a possible implementation manner, the end surface of the extending end of the sliding piece is an arc surface, and the radius of the arc surface is equal to the maximum radius of the rotor body.

[0022] In a possible implementation manner, the control disc is a disc, and the radius of the arc of the midline of the guide hole is equal to the radius of the control disc.

[0023] In a possible implementation manner, a positioning pin is inserted into the connecting shaft, and the positioning pin is used to prevent the control disc from moving in the axial direction of the rotor body.

[0024] In a possible implementation manner, a first clamping tooth is arranged on the side of the control disc facing the rotor body, and a second clamping tooth corresponding to the first clamping tooth is arranged on the end surface of the rotor body facing the control disc.

[0025] In a possible implementation manner, a scale convex is formed on the end surface of the connecting sleeve and the connecting shaft in the circumferential direction of the connecting shaft.

[0026] The beneficial effects of the variable displacement vane rotor pump provided by this invention are as follows: Compared with the prior art, this invention controls the rotation of the control component, and the sliding component, which is slidably adapted to the control component, can slide radially along the rotor body as the control component rotates. Consequently, the volume of the pump chamber changes due to the movement of the sliding component, thus achieving the technical effect of adjusting the rotor pump's displacement without replacing the rotor. Furthermore, the variable displacement vane rotor pump of this invention achieves the sliding of the sliding component simply by rotating the control component, resulting in a simple and reliable structure. The adjustment process of the pump chamber volume is convenient and direct, which helps to improve the problems of complex structure and low reliability of existing variable displacement vane pumps. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A schematic diagram showing the positional relationship between the rotor and stator of a variable displacement vane rotary pump provided in an embodiment of the present invention.

[0029] Figure 2 This is a schematic diagram of the rotor assembly used in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the sliding component used in an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the rotor body of the variable displacement vane rotor pump used in the embodiments of the present invention.

[0032] Figure 5 This is a schematic diagram of the control component used in an embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the connecting shaft used in an embodiment of the present invention.

[0034] Figure 7 This is a schematic diagram of the spiral groove structure used in an embodiment of the present invention.

[0035] In the picture:

[0036] 1, pump cavity; 2, rotor body; 21, avoiding hole; 22, first installation slot; 23, second installation slot; 24, second clamping tooth; 25, recess; 3, sliding piece; 31, guide structure; 4, control piece; 41, control disc; 411, guide hole; 412, first clamping tooth; 42, connecting sleeve; 421, guide protrusion; 5, connecting shaft; 51, first guide slot; 52, second guide slot; 521, annular slot; 522, helical slot; 6, stator. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0038] Please refer to Figure 1 and Figure 2 , now the variable displacement vane rotor pump provided by the present application will be described.

[0039] The variable displacement vane rotor pump comprises a stator 6, a rotor body 2, a sliding piece 3 and a control piece 4, wherein the rotor body 2 is arranged in the stator 6, and the rotor body 2 is provided with a plurality of vanes along the circumferential direction of the rotor body 2, the vanes are slidingly fitted with the rotor body 2, and the adjacent two vanes, the stator 6 and the rotor body 2 form a pump cavity 1; the sliding piece 3 is slidingly arranged on the outer circumferential surface of the rotor body 2 along the radial direction of the rotor body 2 and is located between the adjacent two vanes, the protruding end of the sliding piece 3 extends into the pump cavity 1, the sliding piece 3 has a guide structure 31 extending along the axial direction of the rotor body 2, the axial end surface of the rotor body 2 is provided with an avoiding hole 21 slidingly fitted with the guide structure 31, and the extension direction of the avoiding hole 21 is parallel to the radial direction of the rotor body 2, the guide structure 31 penetrates through and extends out of the avoiding hole 21; corresponding to the sliding piece 3, the control piece 4 is coaxially arranged on the axial end surface of the rotor body 2, the control piece 4 has a locking state relative to the rotor body 2, and also has an adjusting state coaxially rotating relative to the rotor body 2; the control piece 4 is provided with a guide hole 411 fitted with the protruding end of the guide structure 31, the depth direction of the guide hole 411 is parallel to the axial direction of the rotor body 2, and the guide hole 411 is arranged at an angle with any radial line of the rotor body 2.

[0040] In the present embodiment, when it is necessary to change the displacement of the vane rotor pump, the control piece 4 is rotated relative to the rotor body 2, and in the process of rotation of the rotor body 2, the guide hole 411 moves the sliding piece 3 along the radial direction of the rotor body 2, thereby changing the volume of the corresponding pump cavity 1 by changing the protruding amount of the sliding piece 3.

[0041] The variable displacement vane rotor pump has the beneficial effects that, compared with the prior art, the control member 4 is controlled to rotate, the sliding member 3 matched with the control member 4 can slide along the radial direction of the rotor body 2 with the rotation of the control member 4, and the volume of the pump cavity 1 is changed due to the movement of the sliding member 3, so that the technical effect of adjusting the displacement of the rotor pump without replacing the rotor can be achieved.

[0042] Meanwhile, the variable displacement vane rotor pump can realize the sliding of the sliding member 3 through the rotation of the control member 4, has a simple and reliable structure, and is convenient and direct in the adjustment process of the volume of the pump cavity 1, which is beneficial to improve the problem of complex structure and low reliability of the existing variable displacement vane pump, and the technical idea of changing the volume of the pump cavity 1 by the extension and retraction of the sliding member 3 can also change the volume of the pump cavity 1 more smoothly, and can improve the problem of fluctuation in the operation process of the vane pump caused by the setting of the elastic feedback mechanism.

[0043] It should be noted that the control member 4 is arranged on the end face of the rotor body 2 through the connecting shaft 5, the control member 4 is sleeved on the connecting shaft 5, and the connection mode between the two can refer to the self-locking ball spline. The specific structure is not repeated here.

[0044] Preferably, the number of the sliding members 3 in the embodiment is even, and each sliding member 3 is uniformly arranged around the axis of the rotor body 2, which is arranged for the purpose of not affecting the dynamic balance performance of the rotor body 2. The number of vanes can also be even.

[0045] In some embodiments, please refer to Figures 1 to 6 In order to facilitate the assembly between the rotor body 2 and the control member 4, the variable displacement vane rotor pump further comprises a connecting shaft 5 coaxially fixed to the rotor body 2, the connecting shaft 5 is used for assembling the rotor body 2 in the stator 6, and the axes of the control member 4 and the rotor body 2 are coincided with the axis of the connecting shaft 5; and the control member 4 comprises a control disc 41 and a connecting sleeve 42, wherein the connecting sleeve 42 is coaxially fixed to the side of the control disc 41 away from the rotor body 2, the connecting shaft 5 penetrates the control disc 41 and is arranged in the connecting sleeve 42, and the control disc 41 is provided with a guide hole 411; the inner wall of the connecting sleeve 42 is formed with a guide protrusion 421, corresponding to the guide protrusion 421, the outer periphery of the connecting shaft 5 is formed with a first guide groove 51 and a second guide groove 52 matched with the guide protrusion 421 for sliding, the first guide groove 51 and the second guide groove 52 are sequentially and continuously arranged in the direction towards the rotor body 2, the first guide groove 51 is arranged on the outer periphery of the connecting shaft 5 in the axial direction of the connecting shaft 5, and the second guide groove 52 is arranged on the outer periphery of the connecting shaft 5 around the axis of the connecting shaft 5.

[0046] In the embodiment, the first guide groove 51 is used to limit the rotation of the control member 4 relative to the connecting shaft 5, when the guide protrusion 421 is located in the second guide groove 52, the control member 4 can be rotated relative to the rotor body 2 by changing the position of the guide protrusion 421 on the second guide groove 52, so as to make the sliding member 3 slide along the radial direction of the rotor body 2 to change the volume of the pump cavity 1.

[0047] In the embodiment, the guide protrusion 421 slides on the first guide groove 51 and the second guide groove 52, so that the switching of the control member 4 between the locking state and the adjusting state is more smooth.

[0048] In some embodiments, referring to Figure 6 , the first guide groove 51 is a plurality of and is uniformly arranged on the outer circumferential surface of the connecting shaft 5, and the second guide groove 52 includes an annular groove 521 and a spiral groove 522 which are sequentially communicated towards the rotor body 2; the annular groove 521 is arranged in communication with the first guide groove 51, and the annular groove 521 is continuously distributed on the outer circumferential surface of the connecting shaft 5 along the axial direction of the connecting shaft 5, and the number of the spiral grooves 522 is a plurality and is distributed on the outer circumferential surface of the connecting shaft 5 along the circumferential direction of the connecting shaft 5, and the center line of the spiral groove 522 and the axis of the connecting shaft 5 overlap each other.

[0049] In the embodiment, when the control disc 41 is in the locking state, the guide protrusion 421 is adapted to the spiral groove 522 or the first guide groove 51, and when the control disc 41 is in the adjusting state, the guide protrusion 421 is adapted to the spiral groove 522 or the annular groove 521. In detail, in order to facilitate the fixation of the guide protrusion 421 on a certain position of the spiral groove 522, a nut is rotatably connected to the end face of the connecting sleeve 42 away from the rotor body 2, and an external thread is formed on the end of the connecting shaft 5 away from the rotor body 2, which is screw-adapted to the nut. The connecting sleeve 42 and the internal thread are assembled together by thread cooperation. In this way, when it is needed to drive the control disc 41 to rotate, the nut is twisted to make the connecting sleeve 42 rotate along the radial direction of the connecting shaft 5, and the control disc 41 moves along the preset spiral groove 522 while rotating relative to the rotor body 2, and then the sliding member 3 is driven to move along the radial direction of the rotor body 2 by the sliding adaptation of the control disc 41 and the sliding member 3.

[0050] In some embodiments, referring to Figure 7 , in order to facilitate the rotation of the control disc 41, the number of the spiral grooves 522 is two, and the two spiral grooves 522 are symmetrically arranged with the center line of the first guide groove 51 as the axis of symmetry, and are mirror-symmetrically and communicatively connected.

[0051] In this embodiment, as the guide protrusion 421 moves along the spiral groove 522, the connecting sleeve 42 rotates relative to the connecting shaft 5 as the guide protrusion 421 moves. When the guide protrusion 421 moves to the end of the spiral groove 522, the control disk 41 fits against the end face of the rotor body 2, thereby driving the sliding member 3 to slide radially along the rotor body 2 through the sliding adaptation between the control disk 41 and the sliding member 3.

[0052] In this embodiment, by adapting the guide protrusion 421 to the spiral groove 522 that is arranged in a "V" shape with mirror symmetry and connection, the rotation angle of the control disk 41 can be more precisely limited, making the adjustment process of the pump chamber 1 volume more precise and controllable.

[0053] In some embodiments, please refer to Figure 4 In order to improve the problem of cavitation caused by contact between the rotor body 2 and the sliding member 3, a recess 25 is formed on the rotor body 2, and the recess 25 is located between two adjacent blades.

[0054] More specifically, in this embodiment, the rotor pump body has a first mounting groove 22 that slides and adapts to the sliding member 3, and a second mounting groove 23 that slides and adapts to the blades. The corners of the first mounting groove 22 are provided with transition rounded corners. Transition rounded corners can also be provided on the outer peripheral surface of the rotor pump body at the location corresponding to the first mounting groove 22. The shape of the sliding member 3 is set according to the shape inside the first mounting groove 22, so that the movement of the sliding member 3 inside the first mounting groove 22 is more stable, and the problem of cavitation caused during the flow of fluid in the pump chamber 1 can be improved.

[0055] In some embodiments, please refer to Figure 2 and Figure 3 The end face of the extended end of the sliding member 3 is an arc surface, and the radius of the rounded corner of the arc surface is equal to the maximum radius of the rotor body 2. With this configuration, as the sliding member 3 rotates with the rotor pump, the shape of the liquid flow trajectory generated by its end face due to contact with the fluid is similar to the flow trajectory of the fluid on the outer circumference of the rotor body 2, which can reduce the flow resistance experienced by the sliding member 3 as it rotates with the rotor body 2.

[0056] Of course, the specific shape of the sliding member 3 can also be flexibly set according to the type of pumped fluid or the structure of the rotary pump, such as being cylindrical or screw-shaped.

[0057] In some embodiments, to ensure smoother cooperation between the control panel 41 and the slider 3, please refer to... Figure 2 and Figure 3 The control panel 41 is disc-shaped, and the radius of the fillet of the center line of the guide hole 411 is equal to the radius of the control panel 41.

[0058] In the embodiment, the guide hole 411 rotates with its own corner radius as the control disc 41 rotates, so that the moving track of the guide hole 411 corresponds to its own shape, so as to enhance the smoothness of the sliding fit between the guide structure 31 and the guide hole 411 and reduce the damage to each other when the guide structure 31 and the guide hole 411 are in sliding fit.

[0059] In some embodiments, not shown in the drawings, in order to ensure the connection strength of the connecting shaft 5, the first guide groove 51 and the second guide groove 52 are formed on the inner wall of the connecting sleeve 42, and the guide protrusion 421 is arranged on the outer periphery of the connecting shaft 5. The cooperation between the guide protrusion 421 and the second guide groove 52 in the embodiment can be referred to the above, and will not be repeated here.

[0060] It should be noted that the arrangement of the guide grooves on the connecting sleeve 42 in the embodiment is an optimized arrangement based on the small diameter of the connecting shaft 5 of some small rotor pumps. In this case, arranging the guide grooves on the outer periphery of the connecting shaft 5 may result in insufficient structural strength of the connecting shaft 5, so the guide grooves are arranged on the inner wall of the connecting sleeve 42.

[0061] In some embodiments, not shown in the drawings, an alternative real-time method is provided to fix the connecting sleeve 42 on the connecting shaft 5. Corresponding to the connecting sleeve 42, a positioning pin is inserted on the connecting shaft 5, which is used to prevent the control disc 41 from moving along the axial direction of the rotor body 2.

[0062] In some embodiments, please refer to Figure 4 and Figure 5 , the first clamping tooth 412 is arranged on the side of the control disc 41 facing the rotor body 2, and the second clamping tooth 24 is arranged on the end face of the rotor body 2 facing the control disc 41.

[0063] The first clamping tooth 412 and the second clamping tooth 24 arranged in the embodiment make the connection between the control member 4 and the rotor body 2 more stable in the locked state.

[0064] In some embodiments, please refer to Figures 1 to 6 , while the first clamping tooth 412 and the second clamping tooth 24 are arranged, the helical groove 522 in the above embodiment is arranged on the connecting shaft 5, and the guide protrusion 421 is arranged on the inner wall of the connecting sleeve 42, and the inclination angle of the helical groove 522 is the same as the inclination angle of the meshing surface of the first clamping tooth 412 and the second clamping tooth 24, so that when the guide protrusion 421 moves to the end of the helical groove 522, the first clamping tooth 412 just engages with the second clamping tooth 24.

[0065] In some embodiments, a scale protrusion is formed on the end surface of the connecting sleeve 42 and the connecting shaft 5 in a direction away from the rotor body 2.

[0066] In this way, a reference for the rotation of the connecting sleeve 42 relative to the connecting shaft 5 is provided, and the adjustment of the displacement of the rotor pump in this embodiment is more accurate.

[0067] Optionally, a groove with a cross-sectional shape of a straight line or a cross is also provided on the end surface of the connecting shaft 5 in this embodiment, which can be used as a reference and also facilitates the rotation of the connecting sleeve 42 relative to the connecting shaft 5 by using a screwdriver or other tools.

[0068] Optionally, the scale displayed by the scale protrusion corresponds to the displacement of the rotor pump.

[0069] An alternative embodiment is provided in some embodiments not shown in the drawings. Specifically, a control motor is provided at the end of the connecting sleeve 42, the control motor is electrically connected to a sensor that collects the displacement and rotational speed of the pump body, and a controller is connected. When the displacement of the rotor pump does not need to be adjusted, the output shaft of the control motor is kept synchronous with the rotation of the connecting sleeve 42, and the connecting sleeve 42 is kept synchronous with the rotation of the connecting shaft 5. The controller receives the signal fed back by the sensor, and when it is determined that the displacement of the rotor pump needs to be changed, the rotational speed of the output shaft of the control motor is adjusted, and the connecting sleeve 42 is rotated relative to the connecting shaft 5. The control disc 41 also rotates with the rotation of the connecting sleeve 42, so that the sliding of the sliding member 3 is driven by the sliding adaptation of the control disc 41 and the sliding member 3 to move along the axial direction of the rotor body 2.

[0070] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A variable displacement vane-type rotor pump characterized by, Comprise: A stator; A rotor body arranged in the stator, and a plurality of blades are arranged on the rotor body along the circumferential direction of the rotor body, the blades are slidingly fitted with the rotor body, and the adjacent two blades, the stator and the rotor body form a pump cavity; A sliding member is slidingly arranged on the outer circumferential surface of the rotor body along the radial direction of the rotor body and located between the adjacent two blades, the extending end of the sliding member extends into the pump cavity, the sliding member has a guide structure extending along the axial direction of the rotor body, the axial end surface of the rotor body is provided with a relief hole slidingly fitted with the guide structure, and the extension direction of the relief hole is parallel to the radial direction of the rotor body, and the guide structure penetrates through and extends out of the relief hole; and A control member is coaxially arranged on the axial end surface of the rotor body, the control member has a locking state relatively fixed with the rotor body, and also has an adjusting state coaxially rotating relative to the rotor body, the control member is provided with a guide hole matched with the extending end of the guide structure, the guide hole is an arc-shaped hole, and the long axis of the guide hole is arranged at an angle with any radial line of the rotor body; The variable displacement vane rotor pump further comprises a connecting shaft coaxially fixed to the rotor body; The connecting shaft is used for assembling the rotor body in the stator, and the axis of the control member and the rotor body coincides with the axis of the connecting shaft; The control member comprises a control disc and a connecting sleeve, the connecting sleeve is coaxially fixed to the side of the control disc away from the rotor body, the connecting shaft penetrates through the control disc and is arranged in the connecting sleeve, and the control disc is provided with the guide hole; A guide protrusion is formed on the inner wall of the connecting sleeve, corresponding to the guide protrusion, a first guide groove and a second guide groove slidingly fitted with the guide protrusion are formed on the outer circumferential surface of the connecting shaft, and the first guide groove and the second guide groove are sequentially and continuously arranged in the direction towards the rotor body, wherein the first guide groove is arranged on the outer circumferential surface of the connecting shaft along the axial direction of the connecting shaft, and the second guide groove is arranged on the outer circumferential surface of the connecting shaft around the axis of the connecting shaft.

2. The variable displacement vane rotor pump of claim 1, wherein: The first guide groove is a plurality of grooves and is uniformly arranged on the outer circumferential surface of the connecting shaft around the connecting shaft, and the second guide groove comprises an annular groove and a spiral groove which are sequentially and continuously arranged in the direction towards the rotor body; The annular groove is continuously arranged on the outer circumferential surface of the connecting shaft around the axial direction of the connecting shaft and is in communication with the first guide groove, the number of the spiral grooves is a plurality of grooves and is arranged on the outer circumferential surface of the connecting shaft along the circumferential direction of the connecting shaft, and the midlines of the spiral grooves overlap with the axis of the connecting shaft.

3. The variable displacement vane-type rotor pump according to claim 2, characterized by The number of the spiral grooves is two, the two spiral grooves are symmetrically arranged around the midline of the first guide groove, are mirror symmetrically arranged and are in communication with each other.

4. The variable displacement vane-type rotor pump according to claim 1, wherein Corresponding to the sliding member, a recess is formed on the rotor body and located between the adjacent two blades.

5. The variable displacement vane-type rotor pump according to claim 1, wherein The end surface of the sliding member extension end is an arc surface, and the radius of the arc surface is equal to the maximum radius of the rotor body.

6. The variable displacement vane-type rotor pump according to claim 1, wherein The control disc is a circular disc, and the radius of the arc of the center line of the guide hole is equal to the radius of the control disc.

7. The variable displacement vane-type rotor pump according to claim 1, wherein A positioning pin is inserted into the connecting shaft, and the positioning pin is used to prevent the control disc from moving in the axial direction of the rotor body.

8. The variable displacement vane-type rotor pump according to claim 1, wherein A first clamping tooth is arranged on the side of the control disc facing the rotor body, and a second clamping tooth corresponding to the first clamping tooth is arranged on the end surface of the side of the rotor body facing the control disc.

9. The variable displacement vane-type rotor pump according to claim 1, wherein Scale protrusions are formed on the end surfaces of the connecting sleeve and the connecting shaft and are distributed in the circumferential direction of the connecting shaft.

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