High-precision assembly structure of vane type engine oil variable pump

Abstract

The invention relates to the technical field of liquid variable volume machinery, in particular to a vane type engine oil variable displacement pump high-precision assembly structure which comprises a base, a pump cavity is formed in the base, a top cover is fixedly installed at the top of the base, and a working part is arranged in the pump cavity and used for conveying engine oil; the working component comprises a stator pressure adjusting assembly and a rotor assembly, the stator pressure adjusting assembly is used for adjusting the displacement of the pump, the rotor assembly comprises a blade rotor body, a blade rotor shaft is installed in the blade rotor body in an inserted mode, and the rotor assembly is rotationally installed on the stator pressure adjusting assembly. The rotor assembly is used for oil suction and oil pressing in a pump cavity, and the stator pressure adjusting assembly comprises a vane pump stator. According to the vane type oil pump, the problems of sliding friction wear, increased fit clearance and insufficient displacement adjusting precision caused by linear motion of a dependent variable sliding block in a traditional vane type oil pump can be effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of liquid variable displacement machinery, in particular to a high-precision assembly structure of a vane type oil variable displacement pump. Background Art

[0002] In the automotive engine lubrication system, the performance of the oil pump directly affects the engine's working efficiency and service life. With the development of the automotive industry, the requirements for oil pumps are getting higher and higher. They not only need to meet the flow and pressure requirements under different working conditions, but also require high precision, high reliability and long life.

[0003] At present, there are many types of oil pumps on the market, among which vane oil pumps are widely used due to their compact structure, uniform flow, low noise, etc. However, there are some problems in the assembly process of traditional vane oil pumps, which affect their performance and reliability.

[0004] After extensive searching, the publication number is CN111140761A, which discloses a commercial vehicle vane variable displacement pump, which adopts a sliding variable slider structure. Under the action of the oil pressure in the feedback oil chamber, the variable slider will compress the variable spring to make linear motion, thereby changing the oil pump displacement. Although this structure improves the reliability of the oil pump operation to a certain extent, it still has some shortcomings.

[0005] The variable slider of the pump moves linearly in the rotor cavity, which causes a large sliding friction between the variable slider and the rotor cavity. As the use time increases, this sliding friction will gradually wear the matching surface of the variable slider and the rotor cavity, resulting in an increase in the matching clearance. When the matching clearance increases, the oil is easy to leak in the gap, reducing the volumetric efficiency of the oil pump and affecting the normal operation of the oil pump.

[0006] In summary, the traditional vane-type oil pump has wear problems caused by sliding friction during the variable adjustment process, and a new high-precision assembly structure is needed to solve these problems. Summary of the invention

[0007] The purpose of the present invention is to provide a high-precision assembly structure for a vane-type variable oil pump, which can effectively solve the problems of sliding friction wear, increased fitting clearance and insufficient displacement adjustment accuracy caused by the linear motion of the variable slider in the traditional vane-type oil pump.

[0008] To achieve the above object, the present invention provides the following technical solutions: a high-precision assembly structure of a vane-type variable oil pump, comprising a base, a pump cavity is formed in the base, a top cover is fixedly mounted on the top of the base, a working component is provided in the pump cavity, and the working component is used for oil delivery; The working part comprises a stator pressure regulating assembly and a rotor assembly. The stator pressure regulating assembly is used to adjust the displacement of the pump. The rotor assembly is rotatably mounted on the stator pressure regulating assembly. The rotor assembly is used to absorb and pressurize oil in the pump cavity.

[0009] Preferably, a liquid inlet end is provided on one side of the base, a liquid inlet regulating cavity is provided on the base on the side of the liquid inlet end, and the liquid inlet regulating cavity is communicated with the liquid inlet end.

[0010] When the above technical solution is adopted, the liquid inlet regulating chamber can optimize the path of the oil entering the pump chamber. By installing a solenoid valve, the liquid inlet pressure and flow rate can be adjusted to reduce oil shock and turbulence, thereby improving the working stability and volumetric efficiency of the pump.

[0011] Preferably, a liquid outlet cavity and a liquid return cavity are provided on the base on one side of the pump cavity, and both the liquid outlet cavity and the liquid return cavity are interconnected with the pump cavity; A positioning reserved groove for positioning the working component is provided on the base at the other side of the pump chamber, and a reserved hole is provided at the bottom of the pump chamber.

[0012] When the above technical solution is adopted, the design of the liquid outlet chamber and the liquid return chamber realizes the efficient discharge and circulation of the oil, while the positioning reserved grooves and reserved holes ensure the precise installation of the working parts, reduce assembly errors, and improve the stability and reliability of the overall structure.

[0013] Preferably, the top cover is fixedly mounted on the upper end surface of the base by means of plum screws, and the upper end surface of the top cover is provided with a solenoid valve interface, an observation window and a liquid outlet from left to right; The lower end surface of the top cover is respectively provided with a connecting cavity, a bearing groove, a liquid return hole and a liquid outlet hole from left to right.

[0014] When the above technical solution is adopted, the multi-interface layout of the top cover realizes the integrated design of oil inlet and outlet and control components. The observation window facilitates real-time monitoring of the working status inside the pump. The bearing groove provides stable support for the rotor assembly, improving the rotation accuracy and reliability.

[0015] Preferably, the solenoid valve interface is connected to the communication cavity via a liquid inlet regulating cavity; The communicating cavity is in communication with the pump cavity; the bottom of the liquid return hole is in communication with the liquid return cavity, and the top of the liquid return hole is in communication with the liquid outlet; The bottom of the liquid outlet hole is communicated with the liquid outlet cavity, and the top of the liquid outlet hole is communicated with the liquid outlet end.

[0016] When the above technical solution is adopted, an efficient flow path of the oil from the liquid inlet end to the liquid outlet end is achieved through the optimized design of the connecting cavity and the liquid return hole, which reduces energy loss and pressure fluctuations and improves the overall performance of the pump.

[0017] Preferably, the rotor assembly comprises a blade rotor body, in which a blade rotor shaft is inserted and installed; The top of the blade rotor shaft passes through the blade rotor body and is installed with a blade adjustment ring and a self-lubricating bearing sleeve, and the self-lubricating bearing sleeve is embedded in the bearing groove; The bottom of the blade rotor shaft passes through the blade rotor body and is installed with a blade adjustment ring and a self-lubricating bearing seat, and the self-lubricating bearing seat is embedded in a reserved hole in the pump cavity; The outer side of the blade rotor body is provided with insertion grooves in a ring array, and the blade bodies are movably inserted in the insertion grooves.

[0018] When the above technical solution is adopted, the design of the self-lubricating bearing sleeve and the self-lubricating bearing seat reduces the friction loss of the rotor assembly and prolongs the service life; The movable plug-in mode of the blade body makes the pump displacement adjustment more flexible and adaptable to different working conditions.

[0019] Preferably, the stator voltage regulating assembly includes a vane pump stator, a positioning installation groove is opened on one side of the vane pump stator, a stator fixed shaft is movably inserted in the positioning installation groove, the stator fixed shaft is movably inserted in the positioning reserved groove, and the vane pump stator rotates along the stator fixed shaft in the pump chamber.

[0020] When the above technical solution is adopted, the cooperation between the stator fixing shaft and the positioning reserved groove ensures the stable rotation of the vane pump stator, reduces the wear caused by shaking, and provides reliable mechanical support for displacement adjustment.

[0021] Preferably, an adjustment block installation groove is further provided on the other side of the vane pump stator, and a stator adjustment block is movably installed in the adjustment block installation groove through a stator adjustment column; The upper and lower ends of the vane pump stator close to the stator regulating spring are respectively provided with oil transition grooves.

[0022] When the above technical solution is adopted, the cooperation between the adjusting block mounting groove and the stator adjusting column realizes the fine adjustment of the vane pump stator, and the oil transition groove optimizes the flow of oil between the vane pump stator and the rotor assembly, reducing pressure mutation and energy loss.

[0023] Preferably, the stator adjustment column is movably mounted in the adjustment block mounting groove through a base and a top cover; The stator adjustment block is movably installed in the adjustment block installation groove through a base, a top cover and a stator adjustment column, and a side of the stator adjustment block away from the stator adjustment column is in dynamic contact with the inner wall of the pump chamber.

[0024] When the above technical solution is adopted, the linkage design of the stator adjustment column and the stator adjustment block ensures the smooth rotation of the vane pump stator, and the dynamic contact structure can adapt to wear, maintain good sealing performance, and extend the service life of the pump.

[0025] Preferably, the stator voltage regulating assembly further comprises a stator regulating spring, which is elastically mounted on the other side of the vane pump stator; The stator regulating spring is elastically installed in the liquid return cavity and is used to push the vane pump stator to rotate along the stator fixed axis in the pump cavity.

[0026] When the above technical solution is adopted, the design of the stator adjusting spring provides a stable driving force for the vane pump stator, enabling it to automatically adjust the displacement according to the oil pressure, thereby improving the response speed and energy efficiency of the pump.

[0027] Compared with the prior art, the present invention has the following beneficial effects: The stator pressure regulating assembly of the present invention pushes the vane pump stator to rotate along the stator fixed axis through the stator regulating spring, changes the eccentricity between the vane pump stator and the rotor assembly, and thus realizes displacement regulation. Compared with the traditional variable slider linear motion, the rotational motion of the vane pump stator converts sliding friction into rolling friction. The cooperation between the stator fixed axis and the positioning reserved groove provides a stable rotation support for the vane pump stator, reducing the wear caused by sliding friction. At the same time, the dynamic contact design between the stator regulating block and the inner wall of the pump chamber further optimizes the contact area, reduces the friction resistance, and prolongs the service life of the parts.

[0028] The stator fixed shaft of the present invention is movably inserted into the positioning reserved groove, and the vane pump stator is connected to the stator fixed shaft through the positioning installation groove, so that the vane pump stator can only rotate around the stator fixed shaft. This structural design plays a good limiting role on the vane pump stator, ensures the stability of the vane pump stator when adjusting the displacement, avoids unnecessary shaking, and thus improves the adjustment accuracy and reliability. At the same time, due to the limiting effect of the stator fixed shaft, the wear caused by the unstable movement of the vane pump stator is reduced, and the service life of the parts is further extended.

[0029] The matching design of the stator adjustment column and the stator adjustment block effectively disperses the contact stress of the vane pump stator during rotation through the dynamic contact between the stator adjustment block and the inner wall of the pump chamber, and reduces the direct friction between the vane pump stator and the inner wall of the pump chamber. This structure not only reduces wear, but also automatically adapts to the change of the matching clearance caused by wear through the dynamic compensation of the stator adjustment block, thereby maintaining good matching accuracy, solving the problem of increased matching clearance due to wear in traditional structures, and ensuring the long-term stable operation of the oil pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the installation structure of the working parts of the present invention; Figure 3It is a schematic diagram of the base structure of the present invention; Figure 4 It is a schematic diagram of the top cover structure of the present invention when viewed from above; Figure 5 It is a schematic diagram of the structure of the working parts of the present invention; Figure 6 It is a structural schematic diagram of the stator voltage regulating assembly of the present invention; Figure 7 It is a schematic diagram of the structure of the rotor assembly of the present invention; Figure 8 It is a schematic diagram of the top view of the structure of the present invention; Fig. 9 For the present invention Figure 8 AA cross-sectional structural diagram; Fig.10 For the present invention Figure 8 BB cross-sectional structure diagram; Fig.11 For the present invention Figure 8 Schematic diagram of the CC cross-section structure.

[0031] In the figure: 1. Base; 11. Liquid inlet end; 12. Liquid inlet regulating chamber; 13. Liquid outlet chamber; 14. Liquid return chamber; 15. Pump chamber; 16. Positioning reserved groove; 2. Top cover; 21. Observation window; 22. Liquid outlet end; 23. Plum screw; 24. Solenoid valve interface; 25. Connecting chamber; 26. Bearing groove; 27. Liquid return hole; 28. Liquid outlet hole; 3. Working parts; 31. Stator pressure regulating assembly; 311. Vane pump stator; 311 1. Positioning installation groove; 3112. Adjustment block installation groove; 3113. Oil transition groove; 312. Stator adjustment spring; 32. Rotor assembly; 321. Blade rotor body; 3211. Insertion groove; 322. Blade rotor shaft; 323. Self-lubricating bearing seat; 324. Blade body; 325. Blade adjustment ring; 326. Self-lubricating bearing sleeve; 33. Stator fixing shaft; 34. Stator adjustment column; 35. Stator adjustment block. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Embodiment 1: A high-precision assembly structure of a vane-type oil variable displacement pump, comprising a base 1, a top cover 2 and a working component 3, the specific structure is as follows Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 7 and Fig. 9 shown.

[0034] A pump chamber 15 is provided inside the base 1, with a liquid inlet end 11 and a liquid inlet regulating chamber 12 on one side, and a liquid outlet chamber 13 and a liquid return chamber 14 on the other side, and accurate positioning of the working component 3 is achieved through positioning reserved grooves 16 and reserved holes. The top cover 2 is fixed to the upper end of the base 1 by plum screws 23, and the upper end surface thereof is integrated with a solenoid valve interface 24, an observation window 21 and a liquid outlet end 22, and the lower end surface is provided with a connecting chamber 25, a bearing groove 26, a liquid return hole 27 and a liquid outlet hole 28, forming a complete oil circulation path. The working component 3 includes a stator pressure regulating assembly 31 and a rotor assembly 32. The vane pump stator 311 of the stator pressure regulating assembly 31 is connected to the stator fixed shaft 33 through a positioning installation groove 3111, and the stator fixed shaft 33 is embedded in the positioning reserved groove 16 of the base 1, so that the vane pump stator 311 can flexibly rotate around the stator fixed shaft 33; The stator adjustment block 35 is installed in the adjustment block installation groove 3112 on the other side through the stator adjustment column 34. The stator adjustment block 35 is in dynamic contact with the inner wall of the pump chamber 15 to form an adaptive wear compensation structure. The stator adjustment spring 312 is elastically installed in the return liquid chamber 14 on the other side of the vane pump stator 311 to provide driving force for displacement adjustment. The rotor assembly 32 is composed of a vane rotor body 321, a vane rotor shaft 322 and a vane body 324. The two ends of the vane rotor shaft 322 are respectively matched with the bearing groove 26 of the top cover 2 and the reserved hole of the base 1 through a self-lubricating bearing sleeve 326 and a self-lubricating bearing seat 323 to achieve low-friction rotation; The blade body 324 is movably inserted into the insertion groove 3211 on the outside of the blade rotor body 321, and the oil suction and oil pressure actions are realized by centrifugal force. During operation, the oil enters the liquid inlet adjustment chamber 12 from the liquid inlet end 11, and enters the pump chamber 15 through the connecting chamber 25. The rotor assembly 32 rotates to drive the blade body 324 to form a sealed working chamber. The stator adjustment spring 312 pushes the vane pump stator 311 to rotate around the stator fixed shaft 33 to change the eccentricity to adjust the displacement. The stator adjustment block 35 dynamically compensates for the wear gap. This structure replaces the traditional slider linear motion through stator rotation, converts sliding friction into rolling friction, and cooperates with self-lubricating bearings and dynamic compensation design to significantly reduce wear and extend service life, while achieving efficient flow control and stable adjustment accuracy.

[0035] Embodiment 2: This embodiment further optimizes the oil circulation path and dynamic compensation mechanism based on the embodiment 1. The specific structure is as follows: Figure 1 , Figure 4 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 and Fig.11 As shown. The liquid inlet end 11 of the base 1 is connected to the liquid inlet regulating chamber 12, and the liquid outlet chamber 13 and the liquid return chamber 14 are connected to the liquid outlet end 22 of the top cover 2 through the liquid outlet hole 28 and the liquid return hole 27, respectively, to form a complete oil circulation system; The solenoid valve interface 24 of the top cover 2 is connected to the communication chamber 25 through the liquid inlet adjustment chamber 12, and an external control element can be connected to realize flow regulation. The vane pump stator 311 of the stator pressure regulating assembly 31 realizes fine adjustment through the stator adjustment column 34 and the stator adjustment block 35. The stator adjustment block 35 is movably installed through the base 1, the top cover 2 and the stator adjustment column 34, and its curved surface fits the curved surface of the inner wall of the pump chamber 15 to form dynamic contact; The vane pump stator 311 is provided with oil transition grooves 3113 at the upper and lower ends of one side close to the stator adjustment spring 312 to optimize the flow of oil between the stator and the rotor. During operation, the oil enters the pump chamber 15 from the liquid inlet end 11 through the liquid inlet adjustment chamber 12 and the connecting chamber 25, and completes oil suction and oil pressure under the action of the rotor assembly 32. The stator adjustment spring 312 pushes the vane pump stator 311 to rotate and adjust the displacement. The oil transition groove 3113 reduces pressure mutations, and the stator adjustment block 35 dynamically compensates for the wear gap to ensure sealing. This structure optimizes the oil flow path and reduces pressure loss through the connecting chamber 25 and the return hole 27. The curved contact design of the stator adjustment block 35 increases the contact area, reduces contact stress, and adapts to wear; The oil transition groove 3113 allows the oil to transition smoothly and improves operating stability.

[0036] Embodiment 3: Based on the embodiment 1, this embodiment strengthens the self-lubricating design and dynamic compensation synergy of the rotor assembly 32. The specific structure is as follows: Figure 5 , Figure 6 , Figure 7 and Fig. 9 As shown. The two ends of the blade rotor shaft 322 of the rotor assembly 32 are respectively installed with a self-lubricating bearing sleeve 326 and a self-lubricating bearing seat 323, which are embedded in the bearing groove 26 of the top cover 2 and the reserved hole of the base 1 to achieve low-friction support; The blade body 324 is movably inserted into the insertion slot 3211 on the outer side of the blade rotor body 321, and the blade extension amount is adjusted by the blade adjustment ring 325. The vane pump stator 311 of the stator pressure regulating assembly 31 is in dynamic contact with the inner wall of the pump chamber 15 through the stator adjustment column 34 and the stator adjustment block 35, and the stator adjustment spring 312 provides the adjustment driving force; The oil transition groove 3113 further optimizes the oil flow and reduces energy loss. During operation, the rotor assembly 32 rotates at high speed supported by the self-lubricating bearing, the blade body 324 extends centrifugally to contact the vane pump stator 311, the stator adjustment spring 312 pushes the vane pump stator 311 to rotate and adjust the displacement, the stator adjustment block 35 dynamically compensates for the wear gap, and the oil flows smoothly through the oil transition groove 3113. This structure reduces the friction loss of the rotor assembly 32 through the self-lubricating bearing and extends the service life; The stator adjustment block 35 works in conjunction with the self-lubricating bearing to further reduce overall wear; The blade adjustment ring 325 and the stator rotate to achieve multi-stage displacement adjustment to meet the needs of different working conditions. At the same time, the oil transition groove 3113 reduces energy loss and improves energy efficiency.

[0037] When the present invention is used, each chamber and hole position of the base 1 is processed according to design requirements, including the pump chamber 15, the liquid inlet end 11, the liquid inlet regulating chamber 12, the liquid outlet chamber 13, the liquid return chamber 14, the positioning reserved groove 16 and the reserved hole.

[0038] The various interfaces and chambers of the top cover 2 are processed, including the solenoid valve interface 24, the observation window 21, the liquid outlet 22, the connecting cavity 25, the bearing groove 26, the liquid return hole 27 and the liquid outlet hole 28.

[0039] Insert the blade rotor shaft 322 into the blade rotor body 321, and install the blade adjustment ring 325, the self-lubricating bearing sleeve 326 and the self-lubricating bearing seat 323. Insert the blade body 324 into the insertion slot 3211 of the blade rotor body 321 to ensure that the blade body 324 can slide flexibly, thereby completing the assembly of the rotor assembly 32.

[0040] Install the stator adjustment column 34 in the adjustment block installation groove 3112, and then install the stator adjustment block 35 in the adjustment block installation groove 3112 through the stator adjustment column 34, ensuring that the stator adjustment block 35 can move flexibly in the adjustment block installation groove 3112. Install the stator adjustment spring 312 on the other side of the vane pump stator 311, and install the vane pump stator 311 in the pump chamber 15 through the stator fixing shaft 33, ensuring that the vane pump stator 311 can rotate along the stator fixing shaft 33 and rotate in the pump chamber 15, and make the vane pump stator 311 located outside the rotor assembly 32, thereby completing the assembly of the working component 3.

[0041] Install the assembled working part 3 in the pump cavity 15 of the base 1, ensure that the self-lubricating bearing sleeve 326 of the rotor assembly 32 is embedded in the bearing groove 26 of the top cover 2, and the self-lubricating bearing seat 323 is embedded in the reserved hole of the base 1. Check whether the parts are tightly matched and the connection is firm.

[0042] After the overall assembly is completed, a special tool is used to press the working component 3. The special tool includes a positioning fixture and a hydraulic pressing device. The stator pressure regulating assembly 31 and the rotor assembly 32 are accurately positioned by the positioning fixture, and then the hydraulic pressing device applies uniform pressure to the vane pump stator 311 and the rotor assembly 32 to ensure that the stator fixed shaft 33 is tightly matched with the positioning reserved groove 16, and the stator adjustment block 35 is in dynamic contact with the pump cavity 15. The size of the pressing force is determined according to the material and structural design of the parts to ensure that the various components will not be displaced due to vibration or pressure changes during the working process. The top cover 2 is fixedly installed on the upper end surface of the base 1 by the plum screw 23 to ensure that the sealing performance between the top cover 2 and the base 1 is good.

[0043] The assembled oil pump is debugged and tested, including flow test, pressure test, leakage test and durability test, etc. According to the test results, the structure and parameters of the oil pump are adjusted and optimized to ensure that the performance of the oil pump meets the design requirements.

Claims

1. A high-precision assembly structure of a vane-type variable oil pump, comprising a base (1), a pump chamber (15) is provided in the base (1), a top cover (2) is fixedly mounted on the top of the base (1), and the characteristics are: A working component (3) is provided in the pump chamber (15), and the working component (3) is used for conveying engine oil; The working component (3) comprises a stator pressure regulating assembly (31) and a rotor assembly (32); the stator pressure regulating assembly (31) is used to adjust the displacement of the pump; the rotor assembly (32) is rotatably mounted on the stator pressure regulating assembly (31); the rotor assembly (32) is used to absorb and pressurize oil in the pump chamber (15).

2. A high-precision assembly structure for a vane-type oil variable displacement pump according to claim 1, characterized in that: The rotor assembly (32) comprises a blade rotor body (321), and a blade rotor shaft (322) is inserted and installed in the blade rotor body (321); The top of the blade rotor shaft (322) passes through the blade rotor body (321) and is installed with a blade adjustment ring (325) and a self-lubricating bearing sleeve (326); The bottom of the blade rotor shaft (322) passes through the blade rotor body (321) and is installed with a blade adjustment ring (325) and a self-lubricating bearing seat (323); The outer side of the blade rotor body (321) is provided with insertion grooves (3211) in the form of a ring array, and the blade bodies (324) are movably inserted into the insertion grooves (3211).

3. A high-precision assembly structure for a vane-type oil variable displacement pump according to claim 2, characterized in that: The stator pressure regulating assembly (31) comprises a vane pump stator (311), a positioning installation groove (3111) is provided on one side of the vane pump stator (311), a stator fixing shaft (33) is movably inserted into the positioning installation groove (3111), the stator fixing shaft (33) is movably inserted into the positioning reserved groove (16), and the vane pump stator (311) rotates along the stator fixing shaft (33) in the pump chamber (15).

4. A high-precision assembly structure for a vane-type oil variable displacement pump according to claim 3, characterized in that: The other side of the vane pump stator (311) is also provided with an adjustment block installation groove (3112), in which a stator adjustment block (35) is movably installed via a stator adjustment column (34); The upper and lower ends of the vane pump stator (311) close to the stator adjustment spring (312) are respectively provided with oil transition grooves (3113).

5. A high-precision assembly structure for a vane-type oil variable displacement pump according to claim 4, characterized in that: The stator adjustment column (34) is movably mounted in the adjustment block mounting groove (3112) via the base (1) and the top cover (2); The stator adjustment block (35) is movably mounted in the adjustment block mounting groove (3112) via the base (1), the top cover (2) and the stator adjustment column (34); a side of the stator adjustment block (35) facing away from the stator adjustment column (34) is in dynamic contact with the inner wall of the pump chamber (15).

6. The high-precision assembly structure of a vane-type oil variable displacement pump according to claim 3, characterized in that: The stator voltage regulating assembly (31) further comprises a stator regulating spring (312), wherein the stator regulating spring (312) is elastically mounted on the other side of the vane pump stator (311); The stator adjusting spring (312) is used to push the vane pump stator (311) to rotate along the stator fixing shaft (33) in the pump chamber (15).

7. The high-precision assembly structure of a vane-type oil variable displacement pump according to claim 1, characterized in that: A liquid inlet end (11) is provided on one side of the base (1), and a liquid inlet regulating cavity (12) is provided on the base (1) on the side of the liquid inlet end (11), and the liquid inlet regulating cavity (12) and the liquid inlet end (11) are communicated with each other.

8. The high-precision assembly structure of a vane-type oil variable displacement pump according to claim 6, characterized in that: A liquid outlet cavity (13) and a liquid return cavity (14) are provided on the base (1) on one side of the pump cavity (15), and the liquid outlet cavity (13) and the liquid return cavity (14) are both communicated with the pump cavity (15); The stator adjustment spring (312) is elastically installed in the liquid return chamber (14); A positioning reserved groove (16) for positioning the working component (3) is provided on the base (1) on the other side of the pump chamber (15), and a reserved hole is provided at the bottom of the pump chamber (15); The self-lubricating bearing seat (323) is embedded in a reserved hole in the pump chamber (15).

9. The high-precision assembly structure of a vane-type oil variable displacement pump according to claim 1, characterized in that: The top cover (2) is fixedly mounted on the upper end surface of the base (1) by means of a plum screw (23); the upper end surface of the top cover (2) is provided with a solenoid valve interface (24), an observation window (21) and a liquid outlet (22); The lower end surface of the top cover (2) is provided with a communication cavity (25), a bearing groove (26), a liquid return hole (27) and a liquid outlet hole (28); A self-lubricating bearing sleeve (326) is embedded and installed in the bearing groove (26).

10. A high-precision assembly structure for a vane-type oil variable displacement pump according to claim 9, characterized in that: The solenoid valve interface (24) is connected to the communication chamber (25) via the liquid inlet regulating chamber (12); The communication chamber (25) is in communication with the pump chamber (15); The bottom of the liquid return hole (27) is in communication with the liquid return chamber (14), and the top of the liquid return hole (27) is in communication with the liquid outlet end (22); The bottom of the liquid outlet hole (28) is in communication with the liquid outlet cavity (13), and the top of the liquid outlet hole (28) is in communication with the liquid outlet end (22).

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