Rotor pump

Abstract

The utility model belongs to the technical field of oil pumps, and discloses a rotor pump which comprises a pump body, a rotor assembly, a rotating shaft and a limiting key, the pump body is provided with an oil suction cavity and an oil discharge cavity and is provided with an oil inlet hole communicated with the oil suction cavity and an oil discharge hole communicated with the oil discharge cavity, the rotor assembly comprises an outer gear ring and an inner gear which are eccentrically arranged, and the pump body is provided with a working cavity. The outer gear ring is rotationally connected to the working cavity, the inner gear is meshed with the outer gear ring, the inner gear, the outer gear ring and the working cavity jointly form a pressure cavity, an insertion hole is formed in the inner gear, the first end of the rotating shaft is inserted into the insertion hole, a first key groove is formed in the end face of the first end of the rotating shaft, and the inner gear is provided with a second key groove communicated with the insertion hole. And the limiting key is inserted into the first key slot and the second key slot. The rotor pump is simple in structure and reliable and stable in connection, dislocation between the rotating shaft and the inner gear is prevented, and reliable oil supply of the rotor pump is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of oil pump technology, and in particular to a rotary pump. Background Technology

[0002] The fuel supply pump in a fuel supply system plays a leading role, ensuring proper engine starting and operation. It is a crucial component that determines the system's functionality. In related technologies, the fuel supply pump can be a rotary pump with an eccentrically positioned internal gear and external gear ring. A rotating shaft drives the internal gear, which in turn drives the external gear ring, thus supplying fuel. Specifically, in existing technology, the internal gear has a insertion hole into which the rotating shaft connects. However, over time, the internal gear may become misaligned relative to the rotating shaft. This misalignment includes deflection of the internal gear relative to the shaft and axial displacement of the internal gear along the shaft. These phenomena affect the reliable power transmission between the shaft and the internal gear, ultimately impacting the rotary pump's pumping efficiency. Utility Model Content

[0003] The purpose of this utility model is to provide a rotor pump that prevents misalignment between the shaft and the internal gear, ensures a reliable and stable connection, and guarantees reliable oil supply from the rotor pump.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A rotary pump, comprising:

[0006] The pump body has an oil suction chamber and an oil discharge chamber. The pump body is provided with an oil inlet hole and an oil discharge hole. The oil inlet hole is connected to the oil suction chamber, and the oil discharge hole is connected to the oil discharge chamber.

[0007] The rotor assembly, located within the pump body, includes an external gear ring and an internal gear. The pump body has a working chamber communicating with the oil suction chamber and the oil discharge chamber. The external gear ring is rotatably connected to the working chamber. The internal gear meshes with the external gear ring. The internal gear and the external gear ring are eccentrically arranged. The internal gear, the external gear ring, and the working chamber together form a pressure chamber. The rotation of the internal gear drives the external gear ring to rotate in the same direction, so that the fuel in the oil suction chamber enters the oil discharge chamber through the pressure chamber.

[0008] The rotating shaft has an insertion hole in the internal gear, and the first end of the rotating shaft is inserted into the insertion hole;

[0009] The limiting key is provided with a first keyway on the end face of the first end of the rotating shaft, and a second keyway connected to the insertion hole on the internal gear. The limiting key is inserted into the first keyway and the second keyway.

[0010] Preferably, the first end face of the rotating shaft, the end face of the internal gear facing the first end of the rotating shaft, and the end face of the limiting key facing the first end of the rotating shaft are flush.

[0011] Preferably, the first end of the rotating shaft includes a first shaft portion and a second shaft portion arranged in a stepped manner. The second shaft portion is located at the end of the first shaft portion. The shaft diameter of the second shaft portion is smaller than that of the first shaft portion. A shoulder is connected between the first shaft portion and the second shaft portion. The second shaft portion is inserted into the insertion hole. The first keyway is formed on the end face of the second shaft portion. The side of the internal gear facing away from the limiting key abuts against the shoulder.

[0012] Preferably, the wall of the working cavity is configured as a closed arc shape, and the outer periphery of the external gear ring slides in fit with the wall of the working cavity.

[0013] Preferably, the system also includes a safety valve, which comprises a plunger, a first elastic element, and a plug. The oil suction chamber and the oil discharge chamber are connected through a connecting hole. The pump body has a mounting hole connected to the connecting hole. The plug is disposed in the mounting hole. The plunger is slidably connected in the mounting hole. The first elastic element provides a force that forces the plunger to move to block the connecting hole.

[0014] Preferably, the first elastic element is disposed in the mounting hole, with one end of the first elastic element abutting against the plunger and the other end abutting against the plug.

[0015] Preferably, the oil inlet hole, the oil outlet hole, and the mounting hole are all located on the periphery of the pump body.

[0016] Preferably, the second end of the rotating shaft is connected to a first pulley, and the output shaft of the engine is provided with a second pulley. The first pulley and the second pulley are connected by a transmission belt.

[0017] Preferably, there are multiple first pulleys, each with a different diameter, and one of the multiple first pulleys is selectively connected to the second end of the rotating shaft.

[0018] Preferably, the pump also includes a pump cover, which is disposed on the pump body to seal the working chamber.

[0019] Beneficial effects:

[0020] The rotor pump provided by this utility model has a shaft whose second end is connected to an engine drive. The engine's operation drives the shaft to rotate, which in turn drives an internal gear to rotate. This internal gear, in turn, drives an external gear ring meshing with it to rotate relative to the working chamber. Due to the eccentric arrangement between the internal gear and the external gear ring, they together form a pressure chamber within the working chamber. It can be understood that as the internal gear and the external gear ring rotate together, the pressure chamber can have positions connecting to both the suction chamber and the discharge chamber. During the joint rotation of the internal gear and the external gear ring, when the pressure chamber reaches the position corresponding to the suction chamber, the change in the meshing area between the internal gear and the external gear ring causes the volume of the pressure chamber to gradually increase, creating a negative pressure. This draws fuel from the suction chamber into the pressure chamber. When the pump reaches the position corresponding to the discharge chamber, the change in the meshing area causes the volume of the pressure chamber to gradually decrease, creating a positive pressure. This then forces the fuel from the pressure chamber back into the discharge chamber, thus achieving fuel pumping and delivery.

[0021] In addition, by setting a limiting component, a first keyway is opened on the end face of the first end of the rotating shaft, and a second keyway is opened on the internal gear communicating with the insertion hole. The limiting key is inserted into both the first keyway and the second keyway. On the one hand, it can prevent the internal gear from deflecting relative to the rotating shaft, and on the other hand, it can provide a limit to the first end of the rotating shaft to restrict the internal gear from deflecting along the axial direction of the rotating shaft, ensuring that the connection between the rotating shaft and the internal gear is reliable and stable, and ensuring that the rotor pump can reliably supply oil. Attached Figure Description

[0022] Figure 1 This is an exploded schematic diagram of the rotor pump provided by this utility model;

[0023] Figure 2 This is a side view of the internal structure of the rotor pump provided by this utility model;

[0024] Figure 3 This is a schematic diagram of the pump body of the rotor pump provided by this utility model;

[0025] Figure 4 This is a schematic diagram of the rotor assembly mounted on the pump body of the rotary pump provided by this utility model;

[0026] Figure 5 This is a cross-sectional schematic diagram of the rotor pump provided by this utility model.

[0027] In the picture:

[0028] 1. Pump body; 101. Suction chamber; 102. Discharge chamber; 103. Working chamber; 104. Connecting hole; 11. Oil inlet hole; 12. Oil outlet hole; 13. Mounting hole; 14. Through hole;

[0029] 2. Rotor assembly; 21. External gear ring; 22. Internal gear; 221. Insertion hole; 222. Second keyway;

[0030] 3. Shaft; 301. First shaft section; 302. Second shaft section; 303. Shoulder; 31. First keyway; 32. Bearing; 33. Bushing;

[0031] 4. Limit button;

[0032] 5. Safety valve; 51. Piston; 52. First elastic element; 53. Plug; 54. Ball head; 55. Second elastic element; 56. First sealing ring;

[0033] 6. First pulley;

[0034] 7. Pump cover; 71. Second sealing ring; 72. Screw;

[0035] 81. Oil seal with skeleton; 82. Retaining ring; 83. Washer; 84. Nut. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0040] This embodiment provides a rotary pump. (Refer to...) Figures 1 to 5 As shown, the rotary pump includes a pump body 1, a rotor assembly 2, a rotating shaft 3, and a limiting component. The pump body 1 has an oil suction chamber 101 and an oil discharge chamber 102. The pump body 1 has an oil inlet hole 11 and an oil discharge hole 12. The oil inlet hole 11 is connected to the oil suction chamber 101, and the oil discharge hole 12 is connected to the oil discharge chamber 102. The rotor assembly 2 is located inside the pump body 1 and includes an external gear ring 21 and an internal gear 22. The pump body 1 has a working chamber 103 that connects the oil suction chamber 101 and the oil discharge chamber 102. The external gear ring 21 is rotatably connected to the working chamber 103. The internal gear 22 meshes with the external gear ring 21. The internal gear 22 and the external gear ring 21 are eccentrically arranged. The internal gear 22, the external gear ring 21 and the working chamber 103 together form a pressure chamber. The rotation of the internal gear 22 drives the external gear ring 21 to rotate in the same direction, so that the fuel in the oil suction chamber 101 enters the oil discharge chamber 102 through the pressure chamber. The internal gear 22 has an insertion hole 221, and the first end of the rotating shaft 3 is inserted into the insertion hole 221. The end face of the first end of the rotating shaft 3 has a first keyway 31, and the internal gear 22 has a second keyway 222 that connects to the insertion hole 221. The limiting key 4 is inserted into the first keyway 31 and the second keyway 222.

[0041] In this embodiment, the second end of the rotating shaft 3 is connected to the engine drive. The engine operation drives the rotating shaft 3 to rotate, which in turn drives the internal gear 22 to rotate. The rotation of the internal gear 22 drives the external gear ring 21, which meshes with it, to rotate relative to the working chamber 103. Due to the eccentric arrangement between the internal gear 22 and the external gear ring 21, the internal gear 22 and the external gear ring 21 together form a pressure chamber in the working chamber 103. It can be understood that as the internal gear 22 and the external gear ring 21 rotate together, the pressure chamber can have a position that communicates with both the oil suction chamber 101 and the oil discharge chamber 102. During the joint rotation of the internal gear 22 and the external gear ring 21, when the pressure chamber is connected to the oil suction chamber 101, the change in the meshing area between the internal gear 22 and the external gear ring 21 causes the volume of the pressure chamber to gradually increase, resulting in negative pressure. This allows the fuel in the oil suction chamber 101 to be drawn into the pressure chamber. When the fuel is transported to the position where the pressure chamber is connected to the oil discharge chamber 102, the change in the meshing area between the internal gear 22 and the external gear ring 21 causes the volume of the pressure chamber to gradually decrease, resulting in positive pressure. This then forces the fuel in the pressure chamber into the oil discharge chamber 102, thereby achieving fuel pumping and delivery.

[0042] In addition, by setting a limiting component, a first keyway 31 is opened on the end face of the first end of the rotating shaft 3, and a second keyway 222 is opened on the internal gear 22, which is connected to the insertion hole 221. The limiting key 4 is inserted into both the first keyway 31 and the second keyway 222. On the one hand, it can prevent the internal gear 22 from deflecting relative to the rotating shaft 3. On the other hand, it can provide a limit to the first end of the rotating shaft 3 to restrict the internal gear 22 from deflecting along the axial direction of the rotating shaft 3, ensuring that the connection between the rotating shaft 3 and the internal gear 22 is reliable and stable, and ensuring that the rotor pump can reliably supply oil.

[0043] In this embodiment, the first end face of the rotating shaft 3, the end face of the internal gear 22 facing the first end of the rotating shaft 3, and the end face of the limiting key 4 facing the first end of the rotating shaft 3 are all flush. This arrangement ensures that the end faces of the rotating shaft 3, the internal gear 22, and the limiting key 4 are flush on the same side, making them neat and reliable.

[0044] Specifically, in this embodiment, the first end of the rotating shaft 3 includes a first shaft portion 301 and a second shaft portion 302 arranged in a stepped shape. The second shaft portion 302 is located at the end of the first shaft portion 301, and the shaft diameter of the second shaft portion 302 is smaller than the shaft diameter of the first shaft portion 301. A shoulder 303 is connected between the first shaft portion 301 and the second shaft portion 302. The second shaft portion 302 is inserted into the insertion hole 221, and a first keyway 31 is formed on the end face of the second shaft portion 302. The side of the internal gear 22 facing away from the limiting key 4 abuts against the shoulder 303. Specifically, by setting the first end of the rotating shaft 3 as a stepped first shaft portion 301 and a second shaft portion 302, a shoulder 303 is formed between the first shaft portion 301 and the second shaft portion 302. The shoulder 303 is used to limit the side of the internal gear 22 facing away from the limiting key 4. When the internal gear 22 is installed in place, the shoulder 303 and the limiting component can simultaneously limit the two opposite sides of the internal gear 22 in the axial direction of the rotating shaft 3, further ensuring that the internal gear 22 is installed reliably and stably, limiting the internal gear 22 from shifting in the axial direction of the rotating shaft 3, and ensuring that the connection between the rotating shaft 3 and the internal gear 22 is reliable and stable.

[0045] Furthermore, the cavity wall of the working cavity 103 is configured as a closed arc shape, and the outer periphery of the external gear ring 21 slides in fit with the cavity wall of the working cavity 103. The arc-shaped cavity wall of the working cavity 103 can better fit with the circular outer periphery of the external gear ring 21, and when the external gear ring 21 is driven to rotate, the outer periphery of the external gear ring 21 can form a reliable and stable sliding connection with the cavity wall of the working cavity 103. Preferably, a lubricating oil film can be coated between the cavity wall of the working cavity 103 and the outer periphery of the external gear ring 21 to reduce the friction between them.

[0046] In this embodiment, the rotor pump further includes a safety valve 5, which includes a plunger 51, a first elastic element 52, and a plug 53. The suction chamber 101 and the discharge chamber 102 are connected through a connecting hole 104. The pump body 1 has a mounting hole 13 connected to the connecting hole 104. The plug 53 covers the mounting hole 13, and the plunger 51 is slidably connected within the mounting hole 13. The first elastic element 52 provides a force that forces the plunger 51 to move and block the connecting hole 104. Specifically, when the pressure in the discharge chamber 102 does not reach a threshold, the elastic force of the first elastic element 52 is sufficient to push the plunger 51 to block the connecting hole 104. That is, under normal pressure, the discharge chamber 102 and the suction chamber 101 are not connected. When the fuel pressure in the drain chamber 102 is too high, the fuel in the drain chamber 102 will push against the plunger 51 and move toward the side that contacts and seals the connecting hole 104. The first elastic element 52 is gradually compressed until the plunger 51 releases the seal on the connecting hole 104, and finally the oil suction chamber 101 and the drain chamber 102 are connected, so as to relieve the pressure of the fuel in the drain chamber 102.

[0047] Furthermore, the safety valve 5 also includes a ball head 54 and a second elastic element 55. The ball head 54 is located on the side where the oil discharge chamber 102 is located and is used to push against the plunger 51. The second elastic element 55 connects the ball head 54 and the oil discharge chamber 102. The second elastic element 55 is provided to balance the elastic force of the first elastic element 52 and to provide a certain pressure to the ball head 54. When the fuel pressure in the oil discharge chamber 102 is too high, the fuel exerts force on the ball head 54, allowing the ball head 54 to exert force on the plunger 51 more evenly and reliably, ensuring that the plunger 51 is more effectively pushed up.

[0048] Optionally, both the first elastic element 52 and the second elastic element 55 are configured as springs.

[0049] Furthermore, the mounting hole 13 is a threaded hole, and the plug 53 is provided with a threaded section. The plug 53 is threadedly connected to the mounting hole 13, that is, the plug 53 is screwed to the end of the mounting hole 13, and the installation is reliable and secure.

[0050] Furthermore, a first sealing ring 56 is provided between the plug 53 and the mounting hole 13, which can seal the gap between the plug 53 and the mounting hole 13.

[0051] In this embodiment, the oil inlet hole 11, the oil outlet hole 12, and the mounting hole 13 are all located on the periphery of the pump body 1. This arrangement rationally arranges the positions of the oil inlet hole 11, the oil outlet hole 12, and the mounting hole 13, effectively utilizing the space of the pump body 1.

[0052] In this embodiment, a first pulley 6 is connected to the second end of the rotating shaft 3, and a second pulley (not shown) is provided on the output shaft of the engine. The first pulley 6 and the second pulley are connected by a transmission belt (not shown). Specifically, when the output shaft of the engine rotates, power is transmitted to the rotating shaft 3 in sequence through the second pulley, the transmission belt, and the first pulley 6, thereby achieving reliable and efficient power output.

[0053] It is worth mentioning that, in order to prevent slippage between the first pulley 6, the second pulley and the transmission belt, a meshing tooth structure can be specially set on the first pulley 6, the second pulley and the transmission belt.

[0054] Furthermore, multiple first pulleys 6 are provided, each with a different diameter, and one of the multiple first pulleys 6 is selectively connected to the second end of the rotating shaft 3. Specifically, by selectively installing multiple first pulleys 6 with different diameters, the rotational speed of the rotor pump can be changed by altering the radius of the first pulleys 6, enabling the rotor pump to pump out different amounts of oil. This design is simple in structure and easy to operate.

[0055] Furthermore, the second end of the rotating shaft 3 is threadedly connected to the first pulley 6. The second end of the rotating shaft 3 is provided with a threaded section, and the first pulley 6 is provided with a corresponding threaded hole. The connection between the first pulley 6 and the second end of the rotating shaft 3 is achieved through the threaded connection between the threaded section and the threaded hole. Specifically, the second end of the rotating shaft 3 has a threaded hole and is connected to a nut 84. A washer 83 is provided between the nut 84 and the first pulley 6.

[0056] In this embodiment, the rotor pump also includes a pump cover 7, which is placed on the pump body 1 to seal the working chamber 103. Specifically, the pump cover 7 and the pump body 1 are fixedly connected by screws 72. The pump cover 7 has a first connecting hole, and the pump body 1 has a second connecting hole. The second connecting hole is a threaded hole, and the screws 72 pass through the first connecting hole and are threadedly connected to the second connecting hole.

[0057] Optionally, multiple first connecting holes, second connecting holes, and screws 72 are provided in a corresponding manner.

[0058] Furthermore, a second sealing ring 71 is provided between the pump body 1 and the pump cover 7. The second sealing ring 71 is provided to seal the gap between the pump body 1 and the pump cover 7. Specifically, a groove is provided on the pump body 1, and the second sealing ring 71 is partially embedded in the groove.

[0059] Optionally, both the first sealing ring 56 and the second sealing ring 71 are made of rubber.

[0060] Specifically, the rotating shaft 3 is rotatably connected to the pump body 1 via the bearing 32. A retaining ring 82 is also provided on one side of the bearing 32, which is used to limit the bearing 32 and prevent the bearing 32 from moving.

[0061] Specifically, the pump body 1 has a through hole 14 for the rotating shaft 3 to pass through.

[0062] Furthermore, a bushing 33 is also fitted on the rotating shaft 3. The bushing 33 and the through hole 14 are tightly fitted, while the rotating shaft 3 and the bushing 33 are loosely fitted. The bushing 33 can fill the gap between the through hole 14 and the rotating shaft 3.

[0063] Furthermore, a skeleton oil seal 81 is also fitted on the bushing 33. The skeleton oil seal 81 can seal the gap between the bushing 33 and the oil suction chamber 101 and the oil discharge chamber 102 to prevent oil leakage.

[0064] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A rotor pump, characterized by The utility model relates to a pump, comprising: a pump body (1) having an oil suction chamber (101) and an oil discharge chamber (102), the pump body (1) being provided with an oil inlet hole (11) and an oil discharge hole (12), the oil inlet hole (11) being communicated with the oil suction chamber (101), and the oil discharge hole (12) being communicated with the oil discharge chamber (102); a rotor assembly (2) arranged in the pump body (1) and comprising an outer gear ring (21) and an inner gear (22), the pump body (1) being provided with a working chamber (103) communicated with the oil suction chamber (101) and the oil discharge chamber (102), the outer gear ring (21) being rotatably connected in the working chamber (103), the inner gear (22) being meshingly connected with the outer gear ring (21), the inner gear (22) and the outer gear ring (21) being eccentrically arranged, the inner gear (22), the outer gear ring (21) and the working chamber (103) jointly forming a pressure chamber, the inner gear (22) being rotatable to drive the outer gear ring (21) to rotate in the same direction, so as to make the fuel in the oil suction chamber (101) enter the oil discharge chamber (102) through the pressure chamber; a rotating shaft (3), the inner gear (22) being provided with a insertion hole (221), and the first end of the rotating shaft (3) being inserted into the insertion hole (221); a limiting key (4), the first end of the rotating shaft (3) being provided with a first key groove (31) on the end face, the inner gear (22) being provided with a second key groove (222) communicated with the insertion hole (221), and the limiting key (4) being inserted into the first key groove (31) and the second key groove (222).

2. The rotor pump of claim 1, wherein The end face of the first end of the rotating shaft (3), the end face of the inner gear (22) towards the first end of the rotating shaft (3), and the end face of the limiting key (4) towards the first end of the rotating shaft (3) are flushly arranged.

3. The rotor pump of claim 1, wherein The first end of the rotating shaft (3) comprises a first shaft part (301) and a second shaft part (302) arranged in a stepped manner, the second shaft part (302) being located at the end of the first shaft part (301), the shaft diameter of the second shaft part (302) being smaller than that of the first shaft part (301), a shaft shoulder (303) being connected between the first shaft part (301) and the second shaft part (302), the second shaft part (302) being inserted into the insertion hole (221), the first key groove (31) being arranged on the end face of the second shaft part (302), and the side of the inner gear (22) away from the limiting key (4) being abutted with the shaft shoulder (303).

4. The rotor pump of claim 1, wherein The cavity wall of the working chamber (103) is arranged in a closed arc shape, and the outer periphery of the outer gear ring (21) is slidably matched with the cavity wall of the working chamber (103).

5. The rotor pump of claim 1, wherein The safety valve (5) comprises a plunger (51), a first elastic member (52) and a plug (53), the oil suction cavity (101) and the oil discharge cavity (102) are communicated through a communication hole (104), the pump body (1) is provided with a mounting hole (13) communicated with the communication hole (104), the plug (53) covers the mounting hole (13), the plunger (51) is slidingly connected in the mounting hole (13), and the first elastic member (52) provides a force for forcing the plunger (51) to move to block the communication hole (104).

6. The rotor pump of claim 5, wherein The first elastic member (52) is arranged in the mounting hole (13), one end of the first elastic member (52) abuts against the plunger (51), and the other end abuts against the plug (53).

7. The rotor pump of claim 5, wherein The oil inlet hole (11), the oil discharge hole (12) and the mounting hole (13) are all arranged on the circumferential side of the pump body (1).

8. The rotor pump of claim 1, wherein The second end of the rotating shaft (3) is connected with a first belt pulley (6), an output shaft of an engine is provided with a second belt pulley, and the first belt pulley (6) is drivingly connected with the second belt pulley through a transmission belt.

9. The rotor pump of claim 8, wherein, The first belt pulley (6) is provided with a plurality of first belt pulleys (6), the diameters of the plurality of first belt pulleys (6) are different, and the plurality of first belt pulleys (6) are selectively connected to the second end of the rotating shaft (3).

10. The rotor pump of claim 1, wherein The pump cover (7) covers the pump body (1) to block the working cavity (103).

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