Compressor pump body and rolling piston compressor

Abstract

The application belongs to the technical field of compressors and discloses a compressor pump body and a rolling rotor type compressor. The compressor pump body comprises a cylinder, a vane and a piston. The cylinder is provided with a containing cavity. The containing cavity is provided with a vane groove and an air inlet. The vane is arranged in the vane groove in a radial sliding mode. The piston is arranged in the containing cavity in an eccentric rotating mode. One end of the vane abuts against the outer wall of the piston. The piston and the vane divide the containing cavity into a first cavity and a second cavity. The first cavity is communicated with the air inlet. The cylinder is further provided with a communication groove. The communication groove is communicated with the vane groove and the second cavity. One end of the vane inserted into the vane groove is provided with a notch. The vane is switched between a communication state of communicating with the communication groove and a plugging state of plugging the communication groove. When the vane is inserted into the containing cavity, the vane plugs the communication groove. When the vane is completely retracted into the vane groove, the notch is communicated with the communication groove. The compressor pump body of the application can make the piston rotate reversely, so that the rolling rotor type compressor can realize the function of power generation.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and more particularly to compressor pump bodies and rolling rotor compressors. Background Technology

[0002] Traditional gas compression energy storage systems on the market require a compressor (usually a centrifugal compressor) and an expander (usually a radial expander). The expander must first compress and store energy through the compressor before it can operate to generate electricity. Therefore, the entire system is relatively large and complex, and urgently needs optimization. Traditional rotary compressors, on the other hand, operate by having a motor drive a rotor and piston to rotate counterclockwise eccentrically within the cylinder's housing after being powered on. This compresses the low-pressure refrigerant gas into high-pressure refrigerant gas before discharging it, thus achieving the compression function (i.e., compression energy storage). Traditional designs only consider the compression function. However, if high-pressure refrigerant gas is applied to the exhaust side of the cylinder, the expansion process of the high-pressure refrigerant gas into low-pressure refrigerant gas drives the rotor to rotate in the opposite direction. This allows the rotor to drive the motor to generate electricity. Thus, the rotary compressor can achieve both compression energy storage and expansion power generation, greatly simplifying the gas compression energy storage system.

[0003] However, due to the presence of the exhaust valve plate in the traditional design, the rotor of the rolling rotor compressor cannot rotate in reverse. Therefore, it is urgent to design a new compressor pump body and a rolling rotor compressor to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a compressor pump body and a rolling rotor compressor that can perform both compression and expansion functions. When powered on, the rolling rotor compressor can compress refrigerant gas normally; when powered off, the high-pressure refrigerant gas expands, causing the motor rotor to rotate in the opposite direction, thereby driving the motor to generate electricity, thus enabling the rolling rotor compressor to achieve the power generation function.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] Firstly, a compressor pump body is provided, the compressor pump body comprising:

[0007] A cylinder, wherein a receiving cavity is provided in the middle of the cylinder, a vane groove is provided on the side wall of the receiving cavity along the radial direction of the cylinder, and an air inlet is also provided on the side wall of the receiving cavity;

[0008] The blade is slidably disposed in the blade groove along the radial direction of the cylinder;

[0009] A piston is arranged eccentrically in the accommodating cavity, and one end of the vane extending out of the vane slot abuts against the outer wall of the piston. The piston and the vane divide the accommodating cavity into a first cavity and a second cavity, and the first cavity is in communication with the air inlet.

[0010] At least one end surface of the cylinder is provided with a communication groove in communication with the vane slot and the second cavity. At least one notch is provided on the end surface of the one end of the vane extending into the vane slot. The vane switches between a communication state of communicating the communication groove and a blocking state of blocking the communication groove. When the vane extends into the accommodating cavity, the vane blocks the communication groove. When the vane is completely retracted into the vane slot, the notch is in communication with the communication groove.

[0011] As an optional technical solution, the communication groove and the air inlet are respectively located on both sides of the vane slot.

[0012] As an optional technical solution, the communication groove and the notch are respectively provided on the same end surface of the cylinder and the vane.

[0013] As an optional technical solution, the air inlet is provided on the other end surface of the cylinder.

[0014] As an optional technical solution, a first through hole is radially provided on the outer wall of the cylinder, the first through hole is in communication with the vane slot, and the center axis of the first through hole overlaps the center line of the vane slot.

[0015] As an optional technical solution, the slot opening of the communication groove in communication with the vane slot is a first slot opening, one end of the first through hole closest to the center point of the accommodating cavity is a hole bottom end, the distance from the hole bottom end to the center point of the accommodating cavity is less than the distance from the first slot opening to the center point of the accommodating cavity, and a connecting groove is axially provided on one side of the vane slot, the connecting groove is in communication with the hole bottom end, and when the vane is completely retracted into the vane slot, the notch is in communication with the connecting groove.

[0016] As an optional technical solution, a second through hole is axially provided on one end of the vane slot away from the accommodating cavity, the center axis of the second through hole is located on the same plane as the center axis of the first through hole, and the distance from the second through hole to the center point of the accommodating cavity is greater than the distance from the connecting groove to the center point of the accommodating cavity.

[0017] As an optional technical solution, a positioning hole is axially provided on the cylinder.

[0018] As an optional technical solution, both side walls of the port of the vane slot in communication with the accommodating cavity are provided with chamfers.

[0019] In a second aspect, there is provided a rolling piston compressor comprising the compressor pump body as described above.

[0020] The present application has the following advantages:

[0021] The compressor pump body and the rolling piston compressor provided by the present application can realize the compression function when the rolling piston compressor is powered on and operated, and the rolling piston compressor can realize the power generation function when the rolling piston compressor is used as an expander to generate power. BRIEF DESCRIPTION OF DRAWINGS

[0022] The present application will be further described in detail below with reference to the accompanying drawings and embodiments;

[0023] Figure 1 The top view of the first state of the compressor pump body described in the embodiment;

[0024] Figure 2 The top view of the second state of the compressor pump body described in the embodiment;

[0025] Figure 3 The top view of the third state of the compressor pump body described in the embodiment;

[0026] Figure 4 The top view of the fourth state of the compressor pump body described in the embodiment;

[0027] Figure 5 The bottom view of the first state of the compressor pump body described in the embodiment;

[0028] Figure 6 The structural schematic diagram of the first state of the compressor pump body from another perspective described in the embodiment;

[0029] Figure 7 The structural schematic diagram of the cylinder described in the embodiment;

[0030] Figure 8A sectional view of a rolling piston compressor as described in the examples.

[0031] In the drawings:

[0032] 100, compressor pump body; 200, motor rotor; 300, motor stator;

[0033] 1, cylinder; 11, accommodating cavity; 111, first cavity; 112, second cavity; 12, vane slot; 121, chamfer; 13, air inlet; 14, communication groove; 141, first slot; 15, first through hole; 151, hole bottom end; 16, connecting groove; 17, second through hole; 18, positioning hole; 19, high-pressure contact part; 110, sealing part;

[0034] 2, vane; 21, notch;

[0035] 3, piston;

[0036] 4, upper cylinder cover;

[0037] 5, lower cylinder cover;

[0038] 6, intermediate plate;

[0039] 7, crankshaft. DETAILED DESCRIPTION

[0040] In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present application will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0041] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0043] In the description herein, it should be understood that the terms "upper", "lower", "left", "right", and the like orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", are only used to distinguish in description, and have no special meaning.

[0044] In the description of the present application, the description referring to the terms "an embodiment", "an example", and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0045] The technical solutions of the present application will be further described below in conjunction with the drawings and through specific embodiments.

[0046] In a conventional gas compression energy storage system, for example, carbon dioxide or other refrigerant gas is compressed by a compressor driven by electric energy, and the compressed carbon dioxide gas is stored as a supercritical fluid in a gas storage device. When power generation is required, the gas storage device releases the supercritical carbon dioxide fluid to drive a turbine to rotate to drive a generator to generate electricity. The power generation process requires two sets of equipment, a compressor and a turbine generator, which has high equipment cost. Therefore, the present embodiment provides a rolling rotor compressor which can realize both compressor and expander functions, so that the piston 3 in the compressor pump body 100 can be switched between forward rotation and reverse rotation to realize the functions of compressing gas and generating electricity, to meet the needs in new fields such as new energy storage.

[0047] As Figures 1 to 7As shown, the embodiment provides a compressor pump body 100, which comprises a cylinder 1, a vane 2 and a piston 3. The middle part of the cylinder 1 is provided with a receiving cavity 11. The side wall of the receiving cavity 11 is provided with a vane groove 12 along the radial direction of the cylinder 1. The side wall of the receiving cavity 11 is also provided with an air inlet 13. The vane 2 is slidingly arranged in the vane groove 12 along the radial direction of the cylinder 1. The piston 3 is eccentrically arranged in the receiving cavity 11. One end of the vane 2 extending out of the vane groove 12 abuts against the outer wall of the piston 3. The piston 3 and the vane 2 divide the receiving cavity 11 into a first cavity 111 and a second cavity 112. The first cavity 111 is in communication with the air inlet 13. At least one end surface of the cylinder 1 is provided with a communication groove 14. The communication groove 14 is in communication with the vane groove 12 and the second cavity 112. At least one notch 21 is provided on the end surface of the one end of the vane 2 extending into the vane groove 12. The vane 2 switches between a communication state of communicating the communication groove 14 and a plugging state of plugging the communication groove 14. When the vane 2 extends into the receiving cavity 11, the vane 2 plugs the communication groove 14. When the vane 2 completely retracts into the vane groove 12, the notch 21 is in communication with the communication groove 14.

[0048] In the embodiment, the end surface of the cylinder 1 is provided with the communication groove 14. In other embodiments, both end surfaces of the cylinder 1 are provided with the communication groove 14.

[0049] In the embodiment, the one end of the vane 2 extending into the vane groove 12 is provided with one notch 21.

[0050] Specifically, when the rolling piston compressor is powered on, the rolling piston compressor is used to compress refrigerant gas to exert the compression function. The motor rotor 200 rotates counterclockwise to drive the crankshaft 7 and the piston 3 to rotate counterclockwise eccentrically in the receiving cavity 11. The first cavity 111 is used as a suction chamber, and the second cavity 112 is used as a compression chamber. Low-pressure refrigerant gas enters the first cavity 111 from the air inlet 13, is compressed into high-pressure refrigerant gas in the second cavity 112, and is then discharged from the shell of the rolling piston compressor to enter a high-pressure gas storage device, thereby realizing the compression function. When the rolling piston compressor is used as an expander to generate electricity, the second cavity 112 is used as an expansion chamber, and the first cavity 111 is used as an exhaust chamber. The high-pressure gas storage device inputs high-pressure refrigerant gas to the high-pressure contact part 19 of the compressor pump body 100. The high-pressure refrigerant gas enters the communication groove 14 from the notch 21 of the vane 2, and the communication groove 14 is in communication with the second cavity 112. Therefore, the high-pressure refrigerant gas enters the second cavity 112 from the communication groove 14. The high-pressure refrigerant gas expands in the second cavity 112 to drive the piston 3 to rotate clockwise eccentrically in the receiving cavity 11, thereby driving the crankshaft 7 to rotate to drive the motor rotor 200 to generate electricity. Thus, the rolling piston compressor of the embodiment can realize the electricity generation function.

[0051] Figure 1 is a top view of the piston 3 in the 0° position; Figure 2Fig. 4 is a plan view of the piston 3 when it is rotated counterclockwise by 45° or clockwise by 315°; Figure 3 Fig. 5 is a plan view of the piston 3 when it is rotated counterclockwise by 180° or clockwise by 180°; Figure 4 Fig. 6 is a plan view of the piston 3 when it is rotated counterclockwise by 315° or clockwise by 45°.

[0052] Fig. 7 is a plan view of the piston 3 when it is rotated counterclockwise by 45° or clockwise by 315°; Figure 1 Fig. 8 is a plan view of the piston 3 when it is rotated counterclockwise by 180° or clockwise by 180°; Figure 2 Fig. 9 is a plan view of the piston 3 when it is rotated counterclockwise by 315° or clockwise by 45°. Figure 3 Figure 4 Fig. 10 is a plan view of the piston 3 when it is rotated counterclockwise by 45° or clockwise by 315°;

[0053] Fig. 11 is a plan view of the piston 3 when it is rotated counterclockwise by 45° or clockwise by 315°; Figure 1 Fig. 12 is a plan view of the piston 3 when it is rotated counterclockwise by 45° or clockwise by 315°; Figure 4 ​As shown, when the high-pressure refrigerant gas expands and pushes the piston 3 to rotate clockwise by 45°, the notch 21 of the vane 2 is just disconnected from the communication groove 14, the vane 2 blocks the communication groove 14, and the low-pressure refrigerant gas in the first cavity 111 is discharged from the gas inlet 13 to the outside. Figure 3 As shown, when the high-pressure refrigerant gas pushes the piston 3 to rotate clockwise by 180°, the notch 21 of the vane 2 is farthest from the communication groove 14, the vane 2 blocks the communication groove 14, the high-pressure refrigerant gas continues to expand in the second cavity 112, and the low-pressure refrigerant gas in the first cavity 111 continues to be discharged from the gas inlet 13 to the outside. Figure 2 As shown, when the high-pressure refrigerant gas expands and pushes the piston 3 to rotate clockwise by 315°, the notch 21 of the vane 2 starts to communicate with the communication groove 14, the gas storage device continues to supply the high-pressure refrigerant gas from the notch 21 of the vane 2 into the second cavity 112 through the communication groove 14, the high-pressure refrigerant gas expands in the second cavity 112, and the piston 3 continues to rotate clockwise by inertia. The relationship between the movement distance of the vane 2 and the rotation angle of the piston 3 is only one embodiment. In other embodiments, the piston 3 can rotate clockwise by 25° or 35°, the notch 21 of the vane 2 is just disconnected from the communication groove 14, the piston 3 rotates clockwise by 325° or 335°, and the notch 21 of the vane 2 starts to communicate with the communication groove 14.

[0054] The cylinder 1 includes a high-pressure contact part 19 and a sealing part 110, the high-pressure contact part 19 surrounds the outer periphery of the sealing part 110, and the accommodating cavity 11 is arranged in the middle part of the sealing part 110. In this embodiment, the communication groove 14 is arranged on the end face of the sealing part 110, the vane groove 12 penetrates through the sealing part 110 and extends into the high-pressure contact part 19, the connecting groove 16 penetrates through the two end faces of the cylinder 1 along the axial direction of the cylinder 1, is located at the connection between the sealing part 110 and the high-pressure contact part 19, and communicates with one side of the vane groove 12, the notch 21 of the vane 2 can simultaneously communicate the communication groove 14 and the connecting groove 16, and the high-pressure refrigerant gas sequentially passes through the connecting groove 16, the notch 21 of the vane 2, and the communication groove 14, and finally enters the second cavity 112.

[0055] Optionally, the communication groove 14 and the gas inlet 13 are respectively arranged on the two sides of the vane groove 12, so as to facilitate the arrangement of the flow paths of the low-pressure refrigerant gas and the high-pressure refrigerant gas.

[0056] Optionally, the communication groove 14 and the notch 21 are respectively arranged on the end faces of the same side of the cylinder 1 and the vane 2, so as to facilitate machining. Specifically, the communication groove 14 is arranged on the first side face of the cylinder 1, the notch 21 is arranged on the second side face of the vane 2, and the first side face of the cylinder 1 and the second side face of the vane 2 are located on the same side.

[0057] Optionally, the gas inlet 13 is arranged on the other end face of the cylinder 1. Specifically, the gas inlet 13 is located on the back face of the sealing part 110.

[0058] Optionally, a first through hole 15 is provided on the outer wall of the cylinder 1 along the radial direction of the cylinder 1. The first through hole 15 passes through the high-pressure contact part 19 and extends into the sealing part 110 along the radial direction of the cylinder 1. The first through hole 15 communicates with the blade groove 12, and the central axis of the first through hole 15 overlaps with the center line of the blade groove 12. The first through hole 15 is used to accommodate the reset component. For example, a spring is set in the first through hole 15, and the spring pushes the blade 2 towards the piston 3, so that the blade 2 always abuts against the outer wall of the piston 3. By aligning the central axis of the first through hole 15 with the center line of the blade groove 12, it can be ensured that the thrust of the reset component does not change direction.

[0059] Optionally, the groove 14 connecting the blade groove 12 is the first groove 141, and the end of the first through hole 15 closest to the center point of the receiving cavity 11 is the bottom end 151 of the hole. The distance from the bottom end 151 of the hole to the center point of the receiving cavity 11 is less than the distance from the first groove 141 to the center point of the receiving cavity 11. A connecting groove 16 is provided on one side of the blade groove 12 along the axial direction of the cylinder 1. The connecting groove 16 is connected to the bottom end 151 of the hole. When the blade 2 is completely retracted into the blade groove 12, the notch 21 is connected to the connecting groove 16.

[0060] Optionally, a second through hole 17 is provided at the end of the blade groove 12 away from the receiving cavity 11 along the axial direction of the cylinder 1. The central axis of the second through hole 17 is located in the same plane as the central axis of the first through hole 15, and the distance from the second through hole 17 to the center point of the receiving cavity 11 is greater than the distance from the connecting groove 16 to the center point of the receiving cavity 11. High-pressure refrigerant gas can enter the connecting groove 16 from the surface of the high-pressure contact part 19, or it can enter the first through hole 15 from the second through hole 17, and then enter the connecting groove 16 from the first through hole 15.

[0061] Optionally, the cylinder 1 has a positioning hole 18 along its axial direction.

[0062] Optionally, the two side walls of the port of the blade groove 12 connecting to the receiving cavity 11 are provided with chamfers 121. When the piston 3 is in the 0° position, the piston 3, the blade 2 and the two chamfers 121 respectively form two symmetrical cavities. Lubricating oil can be stored in the cavity to prevent abnormal noise caused by oil compression.

[0063] like Figure 8 As shown, this embodiment also provides a rolling rotor compressor, which includes the compressor pump body 100 as described above.

[0064] The rolling rotor compressor of the embodiment is a double-rotor rolling rotor compressor, the compressor pump body 100 comprises a crankshaft 7 and two cylinders 1, each cylinder 1 is matched with a vane 2 and a piston 3, and the two pistons 2 are in driving connection with the crankshaft 7; when the double-rotor rolling rotor compressor generates electricity, the two pistons 2 drive the crankshaft 7 and the motor rotor 200 to alternately expand and work in one rotation cycle, so that the operation is more stable.

[0065] The two cylinders 1 are arranged in the axial direction of the compressor pump body 100 and are spaced apart, the cylinder 1 located at the upper side is an upper cylinder, the cylinder 1 located at the lower side is a lower cylinder, the vane 2 matched with the upper cylinder is an upper vane, the piston 3 matched with the upper cylinder is an upper piston, the vane 2 matched with the lower cylinder is a lower vane, and the piston 3 matched with the lower cylinder is a lower piston.

[0066] Optionally, the compressor pump body 100 further comprises an upper cylinder cover 4, a lower cylinder cover 5 and an intermediate plate 6, the intermediate plate 6 is arranged between the upper cylinder and the lower cylinder, the upper cylinder cover 4 is arranged at the top of the upper cylinder, and the lower cylinder cover 5 is arranged at the bottom of the lower cylinder.

[0067] Optionally, the rolling rotor compressor of the embodiment further comprises a motor rotor 200 and a motor stator 300, the motor stator 300 surrounds the outer periphery of the motor rotor 200, one end of the crankshaft 7 is in driving connection with the motor rotor 200, and the other end of the crankshaft 7 is in driving connection with the piston 3 of the compressor pump body 100; when the rolling rotor compressor is powered on, the rolling rotor compressor is used for compressing refrigerant gas, the rolling rotor compressor converts electrical energy into mechanical energy, the motor rotor 200 drives the piston 3 to compress the refrigerant gas through the crankshaft 7, when the rolling rotor compressor needs to be used as an expander, the high-pressure refrigerant gas drives the piston 3 to rotate reversely, the piston 3 drives the motor rotor 200 to generate electricity through the crankshaft 7, and the rolling rotor compressor converts mechanical energy into electrical energy.

[0068] In addition, the above are only the preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, readjustments and substitutions without departing from the protection scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A compressor pump body characterized by, The compressor pump body (100) comprises: a cylinder (1), a middle part of the cylinder (1) is provided with a receiving cavity (11), a side wall of the receiving cavity (11) is provided with a vane slot (12) along a radial direction of the cylinder (1), and the side wall of the receiving cavity (11) is further provided with an air inlet (13); a vane (2) is slidably arranged in the vane slot (12) along the radial direction of the cylinder (1); a piston (3) is eccentrically arranged in the receiving cavity (11), one end of the vane (2) protruding out of the vane slot (12) abuts against an outer wall of the piston (3), and the piston (3) and the vane (2) divide the receiving cavity (11) into a first cavity (111) and a second cavity (112), and the first cavity (111) is in communication with the air inlet (13); at least one end surface of the cylinder (1) is provided with a communication slot (14), the communication slot (14) communicates the vane slot (12) and the second cavity (112), at least one notch (21) is provided on an end surface of one end of the vane (2) protruding into the vane slot (12), the vane (2) is switched between a communication state of communicating the communication slot (14) and a blocking state of blocking the communication slot (14), when the vane (2) protrudes into the receiving cavity (11), the vane (2) blocks the communication slot (14), and when the vane (2) is completely retracted into the vane slot (12), the notch (21) is in communication with the communication slot (14); when the compressor pump body (100) is used as an expander to generate power, high-pressure refrigerant gas enters the second cavity (112) through the communication slot (14) via the notch (21) of the vane (2).

2. The compressor pump body of claim 1, wherein, The communication slot (14) and the air inlet (13) are respectively located on two sides of the vane slot (12).

3. The compressor pump body of claim 1, wherein, The communication slot (14) and the notch (21) are respectively provided on the end surfaces of the same side of the cylinder (1) and the vane (2).

4. The compressor pump body of claim 3, wherein, The air inlet (13) is provided on the other end surface of the cylinder (1).

5. The compressor pump body of claim 1, wherein, A first through hole (15) is provided on the outer wall of the cylinder (1) along the radial direction, the first through hole (15) is in communication with the vane slot (12), and a center axis of the first through hole (15) overlaps with a center line of the vane slot (12).

6. The compressor pump body of claim 5, wherein, A slot opening of the communication slot (14) communicating the vane slot (12) is a first slot opening (141), one end of the first through hole (15) closest to a center point of the receiving cavity (11) is a hole bottom end (151), a distance from the hole bottom end (151) to the center point of the receiving cavity (11) is less than a distance from the first slot opening (141) to the center point of the receiving cavity (11), and an access slot (16) is provided on one side of the vane slot (12) along an axial direction of the cylinder (1), the access slot (16) is in communication with the hole bottom end (151), and when the vane (2) is completely retracted into the vane slot (12), the notch (21) is in communication with the access slot (16).

7. The compressor pump body of claim 6, wherein, The blade groove (12) is provided with a second through hole (17) at one end away from the accommodating cavity (11) in the axial direction, the central axis of the second through hole (17) and the central axis of the first through hole (15) are located in the same plane, and the distance from the second through hole (17) to the center point of the accommodating cavity (11) is greater than the distance from the connecting groove (16) to the center point of the accommodating cavity (11).

8. The compressor pump body of claim 1, wherein, The cylinder (1) is provided with a positioning hole (18) in the axial direction.

9. The compressor pump body of claim 1, wherein, Both side walls of the port of the blade groove (12) communicating with the accommodating cavity (11) are provided with chamfers (121).

10. A rolling piston compressor, characterized by The rolling piston compressor comprises the compressor pump body (100) according to any one of claims 1 to 9.

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