Pump body assembly and sliding vane compressor having the same

Abstract

The present invention provides a pump body assembly and a sliding vane compressor having the same. Among them, the pump body assembly includes a flange, a cylinder, a rotating shaft and a plurality of sliding vanes. The rotor part of the rotating shaft has a sliding vane groove, and the sliding vanes are slidably arranged in the sliding vane groove. The sliding vane groove includes two groove walls and a groove bottom that are arranged parallel to each other. The sliding vane includes: a first surface, the first surface is parallel to the groove wall; a second surface, which is parallel to the first surface, and along the rotation direction of the rotating shaft, the first surface is located behind the second surface; the flange has an air inlet hole, and the pump body assembly further includes: an air inlet part, which is arranged on the first surface, and the air inlet part is communicably arranged with the expansion cavity of the cylinder; during the rotation of the rotating shaft, the rotor part drives the sliding vane to move; when the air inlet part moves to a position where it is communicated with the air inlet hole, the expansion cavity is communicated with the air inlet hole through the air inlet part, so that the pump body assembly starts to inhale. The present invention solves the problem in the prior art that the operation performance of the pump body assembly is affected due to the large suction resistance of the pump body assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular, to a pump body assembly and a sliding vane compressor having the same. Background Art

[0002] Currently, the patent with the application number CN201710916718.9 discloses a sliding vane compressor structure. The suction port groove of this sliding vane compressor is opened on the end faces of the upper and lower flanges and is in a crescent shape, and the starting angle of suction is 15°. Therefore, only when the back of the sliding vane slides past 15° (the starting position of the suction port), the expansion cavity on the back of the sliding vane starts to intake air.

[0003] However, when the back of the sliding vane slides past 15° (the starting position of the suction port) and then intakes air, the suction port area is small, and the volume change rate of the expansion cavity is large, resulting in an increase in suction resistance, insufficient suction, and thus affecting the normal use and operating performance of the pump body assembly. Summary of the Invention

[0004] The main object of the present invention is to provide a pump body assembly and a sliding vane compressor having the same, so as to solve the problem in the prior art that the operating performance of the pump body assembly is affected due to the large suction resistance of the pump body assembly.

[0005] To achieve the above object, according to one aspect of the present invention, a pump body assembly is provided, including a flange, a cylinder, a rotating shaft, and a plurality of sliding vanes. The rotor part of the rotating shaft has a sliding vane groove, and the sliding vanes are slidably arranged in the sliding vane groove. The rotor part is located in the cylinder. The sliding vane groove includes two groove walls and a groove bottom that are arranged parallel to each other, and the two groove walls are connected by the groove bottom. The sliding vane includes: a first surface, which is arranged parallel to the groove wall; a second surface, which is arranged parallel to the first surface, and along the rotation direction of the rotating shaft, the first surface is located behind the second surface; the flange has an air inlet hole, and the pump body assembly further includes: an air inlet part, which is arranged on the first surface, and the air inlet part is communicably arranged with the expansion cavity of the cylinder; wherein, during the rotation of the rotating shaft, the rotor part drives the sliding vanes to move; when the air inlet part moves to a position communicating with the air inlet hole, the expansion cavity is communicated with the air inlet hole through the air inlet part, so that the pump body assembly starts the suction action.

[0006] Further, the air inlet part is arranged near the head of the sliding vane.

[0007] Further, there are a plurality of air inlet parts, and the plurality of air inlet parts are arranged in one-to-one correspondence with the plurality of sliding vanes; or the air inlet parts are in multiple groups, and each group of air inlet parts includes at least two air inlet parts, and the multiple groups of air inlet parts are arranged in one-to-one correspondence with the plurality of sliding vanes.

[0008] Further, the sliding vane further includes a third surface and a fourth surface which are arranged in parallel with each other. One end of the first surface and the second surface is connected through the third surface, and the other end of the first surface and the second surface is connected through the fourth surface; the third surface is arranged perpendicular to the central axis of the rotor part, and the intake part extends to the third surface or the fourth surface.

[0009] Further, the flange includes an upper flange and a lower flange. The lower flange is located below the upper flange. The third surface faces the upper flange, and the fourth surface faces the lower flange. Two intake parts are arranged on each sliding vane. One intake part extends to the third surface, and the other intake part extends to the fourth surface.

[0010] Further, the intake part is a notch, and the maximum distance e between the inner surface of the notch and the first surface and the thickness c of the sliding vane satisfy

[0011] Further, the length m of the notch and the thickness c of the sliding vane satisfy

[0012] Further, the depth h of the notch is greater than or equal to 2 mm and less than or equal to 3 mm.

[0013] Further, the cross-section of the notch is a polygon or a planar shape composed of a curved segment and a straight segment; wherein, the cross-section is arranged parallel to the third surface.

[0014] Further, the notch includes a fifth surface and a sixth surface connected to the fifth surface. The fifth surface is arranged parallel to the third surface; wherein, the sixth surface is an arc surface, or the sixth surface includes a plurality of sequentially connected planes, or the sixth surface is formed by surrounding a plane and an arc surface.

[0015] According to another aspect of the present invention, there is provided a sliding vane compressor, including a housing and a pump body assembly located in the housing. The pump body assembly is the above-mentioned pump body assembly.

[0016] Applying the technical solution of the present invention, the sliding vane groove includes two groove walls and a groove bottom which are arranged in parallel with each other. The two groove walls are connected through the groove bottom. The sliding vane includes a first surface and a second surface. The first surface is arranged parallel to the groove wall. The second surface is arranged parallel to the first surface. Along the rotation direction of the rotating shaft, the first surface is located behind the second surface. An intake part is arranged on the first surface of the sliding vane, and the intake part is communicably arranged with the expansion cavity of the cylinder. The rotating shaft rotates so that the rotor part drives the sliding vane to move. When the intake part moves to a position communicated with the intake hole, the expansion cavity is communicated with the intake hole through the intake part, so that the pump body assembly starts the suction action.

[0017] During the operation of the pump body assembly, when the rotor part drives the sliding vane to move to the starting angle of the air inlet hole, the communication between the air inlet hole and the air inlet part can be achieved, and then the pump body assembly starts to inhale air. Compared with the prior art in which the sliding vane starts to inhale air after sliding past the starting angle, the pump body assembly in the present application realizes early air intake, thereby reducing the initial air intake resistance, solving the problem in the prior art that the operation performance of the pump body assembly is affected due to the large air intake resistance of the pump body assembly, and improving the operation performance of the pump body assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 Shows a partial cross-sectional view of the pump body assembly according to Embodiment 1 of the present invention;

[0020] Figure 2 Shows Figure 1 The top view of the pump body assembly in

[0021] Figure 3 Shows Figure 2 The enlarged schematic view of part A of the pump body assembly in

[0022] Figure 4 Shows Figure 1 The bottom view of the pump body assembly in

[0023] Figure 5 Shows Figure 4 The enlarged schematic view of part B of the pump body assembly in

[0024] Figure 6 Shows Figure 2 The front view of the upper flange of the pump body assembly in

[0025] Figure 7 Shows Figure 4 The front view of the lower flange of the pump body assembly in

[0026] Figure 8 Shows Figure 2 The front view of the sliding vane of the pump body assembly in

[0027] Figure 9 Shows Figure 2 The side view of the sliding vane of the pump body assembly in

[0028] Figure 10 Shows the front view of the sliding vane according to Embodiment 2 of the pump body assembly of the present invention;

[0029] Figure 11A graph showing the relationship between the volume V of the notch and the suction resistance of the first embodiment of the pump body assembly according to the present invention; and

[0030] Figure 12 A curve diagram showing the relationship between the volume V of the notch and the performance COP of the first embodiment of the pump body assembly according to the present invention is shown.

[0031] The above drawings include the following reference numerals:

[0032] 10. Flange; 11. Air inlet; 12. Upper flange; 121. First through hole; 122. Upper flange exhaust port; 13. Lower flange; 131. Second through hole; 20. Cylinder; 21. Expansion chamber; 30. Rotating shaft; 31. Rotor part; 311. Vane groove; 3111. Groove wall; 3112. Groove bottom; 40. Vane; 41. First surface; 42. Second surface; 43. Third surface; 44. Fourth surface; 50. Air inlet; 51. Fifth surface; 52. Sixth surface. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0035] In the present invention, unless otherwise specified, the directional words used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0036] In order to solve the problem in the prior art that the operating performance of the pump body assembly is affected by the large suction resistance of the pump body assembly, the present application provides a pump body assembly and a vane compressor having the same.

[0037] Embodiment 1

[0038] like Figures 1 to 7As shown in the figure, the pump body assembly includes a flange 10, a cylinder 20, a rotating shaft 30 and a plurality of sliding vanes 40. The rotor part 31 of the rotating shaft 30 has a sliding vane groove 311, and the sliding vanes 40 are slidably arranged in the sliding vane groove 311. The rotor part 31 is located inside the cylinder 20. The sliding vane groove 311 includes two groove walls 3111 and a groove bottom 3112 that are arranged parallel to each other. The two groove walls 3111 are connected by the groove bottom 3112. The sliding vane 40 includes a first surface 41 and a second surface 42. The first surface 41 is arranged parallel to the groove wall 3111. The second surface 42 is arranged parallel to the first surface 41. Along the rotation direction of the rotating shaft 30, the first surface 41 is located behind the second surface 42. The flange 10 has an air inlet hole 11, and the pump body assembly further includes an air inlet part 50. The air inlet part 50 is arranged on the first surface 41, and the air inlet part 50 is communicatively arranged with the expansion chamber 21 of the cylinder 20. Wherein, during the rotation of the rotating shaft 30, the rotor part 31 drives the sliding vane 40 to move; when the air inlet part 50 moves to a position communicating with the air inlet hole 11, the expansion chamber 21 communicates with the air inlet hole 11 through the air inlet part 50, so that the pump body assembly starts the air intake action.

[0039] Applying the technical solution of this embodiment, the sliding vane groove 311 includes two groove walls 3111 and a groove bottom 3112 that are arranged parallel to each other. The two groove walls 3111 are connected by the groove bottom 3112. The sliding vane 40 includes a first surface 41 and a second surface 42. The first surface 41 is arranged parallel to the groove wall 3111. The second surface 42 is arranged parallel to the first surface 41. Along the rotation direction of the rotating shaft 30, the first surface 41 is located behind the second surface 42. The air inlet part 50 is arranged on the first surface 41 of the sliding vane 40, and the air inlet part 50 is communicatively arranged with the expansion chamber 21 of the cylinder 20. The rotating shaft 30 rotates so that the rotor part 31 drives the sliding vane 40 to move. When the air inlet part 50 moves to a position communicating with the air inlet hole 11, the expansion chamber 21 communicates with the air inlet hole 11 through the air inlet part 50, so that the pump body assembly starts the air intake action.

[0040] During the operation of the pump body assembly, when the rotor part 31 drives the sliding vane 40 to move to the starting angle of the air inlet hole 11, the communication between the air inlet hole 11 and the air inlet part 50 can be realized, and then the pump body assembly starts to intake air. Compared with the prior art in which the sliding vane starts to intake air after sliding past the starting angle, the pump body assembly in this embodiment realizes early air intake, thereby reducing the initial air intake resistance and solving the problem that the operation performance of the pump body assembly is affected due to the large air intake resistance of the pump body assembly in the prior art, and improving the operation performance of the pump body assembly.

[0041] In this embodiment, the air inlet hole 11 is a crescent-shaped air inlet hole, and the starting position angle of the air inlet hole 11 is 15°. When the back side of the head of the sliding vane 40 moves to the starting edge of the air inlet hole 11, the expansion chamber 21 on the back of the sliding vane 40 has been communicated with the air inlet hole 11 through the air inlet part 50, and at this time, the air intake has already started. Then, the air intake resistance is much smaller than that of the pump body assembly in the prior art, so that the problem of insufficient air intake at this position can be improved, and the operating performance of the pump body assembly can be improved. At the same time, after the air intake resistance is reduced, the air flow noise at the air inlet hole 11 can also be reduced, improving the user experience.

[0042] In this embodiment, the air inlet part 50 is arranged close to the head of the sliding vane 40. Specifically, during the rotation of the rotor part 31, the head of the sliding vane 40 is always in contact with the inner surface of the cylinder 20 to divide the inner cavity of the cylinder 20 into different chambers, so as to compress and exhaust the gas entering the inner cavity, ensuring the normal operation of the pump body assembly. At the same time, the air inlet part 50 is arranged on the back pressure side of the sliding vane 40. After the air inlet part 50 is communicated with the air inlet hole 11, the gas enters the expansion chamber 21 through the air inlet hole 11 and the air inlet part 50, ensuring the normal air intake of the pump body assembly, and further improving the operating reliability of the pump body assembly.

[0043] Optionally, there are multiple air inlet parts 50, and the multiple air inlet parts 50 are arranged in one-to-one correspondence with the multiple sliding vanes 40; or the air inlet part 50 is in multiple groups, and each group of air inlet parts 50 includes at least two air inlet parts 50, and the multiple groups of air inlet parts 50 are arranged in one-to-one correspondence with the multiple sliding vanes 40. In this embodiment, the air inlet part 50 is in three groups, and each group of air inlet parts 50 includes two air inlet parts 50, and the three groups of air inlet parts 50 are arranged in one-to-one correspondence with the three sliding vanes 40. In this way, the above setting ensures that as long as this group of air inlet parts 50 is communicated with the air inlet hole 11, the air intake can be realized, and further ensures that the pump body assembly can continuously intake air, so that the pump body assembly can continuously operate.

[0044] Optionally, the sliding vane 40 further includes a third surface 43 and a fourth surface 44 arranged in parallel with each other. One end of the first surface 41 and the second surface 42 is connected by the third surface 43, and the other end of the first surface 41 and the second surface 42 is connected by the fourth surface 44. The third surface 43 is arranged perpendicular to the central axis of the rotor part 31, and the air inlet part 50 extends to the third surface 43 or the fourth surface 44. In this way, the above setting ensures that the air inlet part 50 can be communicated with the air inlet hole 11, ensuring that the gas can enter the expansion chamber 21 through the air inlet part 50.

[0045] Such as Figures 1 to 7As shown, the flange 10 includes an upper flange 12 and a lower flange 13. The lower flange 13 is located below the upper flange 12. The third surface 43 is arranged facing the upper flange 12, and the fourth surface 44 is arranged facing the lower flange 13. Two air intake parts 50 are provided on each sliding vane 40. One air intake part 50 extends to the third surface 43, and the other air intake part 50 extends to the fourth surface 44. Specifically, air intake holes 11 are provided on both the upper flange 12 and the lower flange 13, that is, the pump body assembly can achieve upper and lower air intake. Gas enters the two air intake parts 50 through the two air intake holes 11 respectively, and enters the expansion cavity 21 through the two air intake parts 50, thereby ensuring that the air intake volume of the pump body assembly can meet the operation requirements and improving the operation reliability of the pump body assembly.

[0046] As Figure 8 shown, the air intake part 50 is a notch, and the maximum distance e between the inner surface of the notch and the first surface 41 satisfies Specifically, the above setting of the notch will also bring gas clearance volume. If this clearance volume is too large, it will reduce the operation performance of the pump body assembly. Therefore, the above setting of the maximum distance e can ensure the operation performance of the pump body assembly on the premise of meeting the requirement of reducing the suction resistance.

[0047] As Figure 9 shown, the length m of the notch satisfies Specifically, the above setting of the length m of the notch can ensure the operation performance of the pump body assembly on the premise of meeting the requirement of reducing the suction resistance, and also improves the operation reliability of the pump body assembly.

[0048] As Figure 9 shown, the depth h of the notch is greater than or equal to 2 mm and less than or equal to 3 mm. Specifically, the above setting of the depth h of the notch can ensure the operation performance of the pump body assembly on the premise of meeting the requirement of reducing the suction resistance, and also improves the operation reliability of the pump body assembly.

[0049] Optionally, the cross-section of the notch is a polygon, or a planar shape composed of a curved segment and a straight segment. Among them, the cross-section is arranged parallel to the third surface 43. In this embodiment, the cross-section of the notch is a planar shape composed of a curved segment and a straight segment. In this way, the above setting makes the processing of the air intake part 50 easier and simpler, reduces the processing difficulty and processing cost. At the same time, the above setting can reduce the impact force of the gas on the notch, reduce the pneumatic noise, and further improve the user experience.

[0050] Optionally, the notch includes a fifth surface 51 and a sixth surface 52 connected to the fifth surface 51. The fifth surface 51 is arranged parallel to the third surface 43. Among them, the sixth surface 52 is an arc surface, or the sixth surface 52 includes a plurality of sequentially connected planar surfaces, or the sixth surface 52 is formed by surrounding with a planar surface and an arc surface. AsFigure 8 and Figure 9 As shown in Figure 9 , the sixth surface 52 is an arc surface. In this way, the above structure is simple, easy to process and implement, further reducing the processing cost and difficulty of the notch, and reducing the labor intensity of the staff.

[0051] As Figure 9 shown, the length of the sliding vane 40 is a, the thickness of the sliding vane 40 is c, the width of the sliding vane 40 is b, the length of the notch is m, the depth (width) of the notch is h, the maximum thickness of the notch is e, and the minimum distance from the notch to the tail of the sliding vane 40 is d. The relationship curve between the volume V of the notch and the suction resistance is as Figure 11 shown. As can be seen from Figure 11 , the larger the volume V, the smaller the suction resistance. The relationship curve between the volume V of the notch and the performance COP is as Figure 12 shown. As can be seen from Figure 12 , the larger the volume V, the worse the operating performance of the pump body assembly. Therefore, on the premise of reducing the suction resistance, the operating performance of the pump body assembly should be ensured.

[0052] This application also provides a sliding vane compressor (not shown), including a housing and a pump body assembly located in the housing, and the pump body assembly is the above-mentioned pump body assembly.

[0053] Embodiment 2

[0054] The difference between the pump body assembly in Embodiment 2 and that in Embodiment 1 lies in: the shape of the notch is different.

[0055] As Figure 10 shown, the cross-section of the notch is a quadrilateral. In this way, the above setting makes the processing of the air inlet part 50 easier and simpler, reducing the processing difficulty and cost.

[0056] As Figure 10 shown, the notch includes a fifth surface 51 and a sixth surface 52 connected to the fifth surface 51. The sixth surface 52 includes three planes connected in sequence, and the three planes surround to form a U-shaped structure. In this way, the above structure is simple, easy to process and implement, further reducing the processing cost and difficulty of the notch, and reducing the labor intensity of the staff.

[0057] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0058] The sliding vane groove includes two groove walls and a groove bottom that are arranged parallel to each other, and the two groove walls are connected by the groove bottom. The sliding vane includes a first surface and a second surface. The first surface is arranged parallel to the groove wall. The second surface is arranged parallel to the first surface, and along the rotation direction of the rotating shaft, the first surface is located behind the second surface. An air inlet portion is arranged on the first surface of the sliding vane, and the air inlet portion is communicatively arranged with the expansion chamber of the cylinder. The rotating shaft rotates so that the rotor portion drives the sliding vane to move. When the air inlet portion moves to a position communicating with the air inlet hole, the expansion chamber communicates with the air inlet hole through the air inlet portion, so that the pump body assembly starts the air intake action.

[0059] During the operation of the pump body assembly, when the rotor portion drives the sliding vane to move to the starting angle of the air inlet hole, the communication between the air inlet hole and the air inlet portion can be achieved, and then the pump body assembly starts to intake air. Compared with the prior art in which the sliding vane starts to intake air after sliding past the starting angle, the pump body assembly in the present application realizes early air intake, thereby reducing the initial air intake resistance and solving the problem in the prior art that the operation performance of the pump body assembly is affected due to the large air intake resistance of the pump body assembly, and improving the operation performance of the pump body assembly.

[0060] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0061] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0062] It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0063] The above are only the preferred embodiments of the present invention, and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pump body assembly, comprising a flange (10), a cylinder (20), a rotating shaft (30) and a plurality of sliding vanes (40). A rotor portion (31) of the rotating shaft (30) has a sliding vane groove (311), and the sliding vanes (40) are slidably disposed in the sliding vane groove (311). The rotor portion (31) is located inside the cylinder (20), and is characterized in that, The sliding vane groove (311) includes two groove walls (3111) and a groove bottom (3112) that are arranged in parallel to each other. The two groove walls (3111) are connected by the groove bottom (3112). The sliding vane (40) includes: A first surface (41) that is arranged parallel to the groove wall (3111); A second surface (42) that is arranged parallel to the first surface (41). Along the rotation direction of the rotating shaft (30), the first surface (41) is located behind the second surface (42); The flange (10) has an air inlet hole (11). The pump body assembly further includes: An air inlet part (50) that is arranged on the first surface (41). The air inlet part (50) is communicatively arranged with the expansion cavity (21) of the cylinder (20); Wherein, during the rotation of the rotating shaft (30), the rotor part (31) drives the sliding vane (40) to move. When the air inlet part (50) moves to a position where it is communicated with the air inlet hole (11), the expansion cavity (21) is communicated with the air inlet hole (11) through the air inlet part (50), so that the pump body assembly starts the air intake action; The air inlet part (50) is arranged near the head of the sliding vane (40).

2. The pump body assembly according to claim 1, characterized in that, There are multiple air inlet parts (50). The multiple air inlet parts (50) are arranged in one-to-one correspondence with the multiple sliding vanes (40); or The air inlet part (50) is in multiple groups. Each group of the air inlet parts (50) includes at least two air inlet parts (50). The multiple groups of air inlet parts (50) are arranged in one-to-one correspondence with the multiple sliding vanes (40).

3. The pump body assembly according to claim 1, characterized in that, The sliding vane (40) further includes a third surface (43) and a fourth surface (44) that are arranged in parallel to each other. One end of the first surface (41) and the second surface (42) is connected by the third surface (43), and the other end of the first surface (41) and the second surface (42) is connected by the fourth surface (44). The third surface (43) is arranged perpendicular to the central axis of the rotor part (31). The air inlet part (50) extends to the third surface (43) or the fourth surface (44).

4. The pump body assembly according to claim 3, characterized in that, The flange (10) includes an upper flange (12) and a lower flange (13). The lower flange (13) is located below the upper flange (12). The third surface (43) faces the upper flange (12), and the fourth surface (44) faces the lower flange (13). Two air inlet parts (50) are arranged on each sliding vane (40). One air inlet part (50) extends to the third surface (43), and the other air inlet part (50) extends to the fourth surface (44).

5. The pump body assembly according to claim 3, characterized in that, The intake part (50) is a notch, and the maximum distance e between the inner surface of the notch and the first surface (41) satisfies the following relationship with the thickness c of the sliding vane (40):

6. The pump body assembly according to claim 5, characterized in that, The length m of the notch satisfies the following relationship with the thickness c of the sliding piece (40):

7. The pump body assembly according to claim 5, characterized in that, The depth h of the notch is greater than or equal to 2 mm and less than or equal to 3 mm.

8. The pump body assembly according to claim 5, characterized in that, The cross-section of the notch is a polygon or a planar shape composed of a curved segment and a straight segment. Wherein, the cross-section is arranged parallel to the third surface (43).

9. The pump body assembly according to claim 5, characterized in that, The notch includes a fifth surface (51) and a sixth surface (52) connected to the fifth surface (51), and the fifth surface (51) is arranged parallel to the third surface (43); wherein, the sixth surface (52) is an arc surface, or the sixth surface (52) includes a plurality of sequentially connected planes, or the sixth surface (52) is formed by surrounding a plane and an arc surface.

10. A sliding vane compressor, comprising a housing and a pump body assembly located inside the housing, and is characterized in that, The pump body assembly is the pump body assembly according to any one of claims 1 to 9.

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