A compressor pump body assembly, compressor

Abstract

The application provides a compressor pump body assembly and a compressor. The compressor pump body assembly comprises a crankshaft, a first compression assembly, a partition plate and a second compression assembly arranged on the crankshaft in sequence, a first cavity is formed between the inner wall of the partition plate and the crankshaft, an oil suction pipe is arranged on the partition plate, one end of the oil suction pipe extends into a compressor oil pool, the other end of the oil suction pipe is connected with the first cavity, a first outlet is arranged on the crankshaft, the first outlet is connected with the first cavity, and the crankshaft can compress the volume in the first cavity when rotating, so that the first cavity can extract oil in the compressor oil pool through the oil suction pipe. According to the application, the defects that one end of the crankshaft needs to be immersed in the oil pool, the sound absorber and the lower flange are sealed by interference fit, and high-pressure gas leakage is prone to occur between the lower flange and the sound absorber in the prior art can be overcome, and the performance of the compressor is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of compressors, and particularly relates to a compressor pump body assembly and a compressor. BACKGROUND

[0002] The existing compressor realizes pump oil of the compressor through an oil suction pipe at a lower end of a crankshaft, and one end of the crankshaft needs to be immersed in an oil pool, so that a lower muffler of the general compressor realizes sealing by interference fit between a circular ring and a top of a lower flange. Through stress analysis, it can be obtained that a connecting section between the lower muffler and the lower flange is stretched upward by a screw, and is subjected to tensile stress, and the direction is upward. Similarly, through overall analysis of the lower muffler, it can be obtained that the circular ring is subjected to tensile stress by interference fit between the circular ring and the top of the lower flange, and the direction is downward. According to action and reaction, the top of the lower flange is subjected to compressive stress, and the direction is upward. The compressive stress is proportional to the interference amount, and is inversely proportional to the material shaping of the lower muffler. If the shaping is good, the stress is small, and vice versa. The compressive stress causes strain of the lower flange, causes poor flatness of the lower flange, and affects reliability of the compressor. Or, the lower muffler may be suspended, and the pump body may be displaced due to failure of the screw pre-tightening force to be applied in place. Meanwhile, the lower muffler is interference fit, and high-pressure gas leakage is prone to occur at the flatness of the lower flange, and the performance of the compressor is reduced, and the oil content is increased.

[0003] Generally, one end of a short shaft of the crankshaft is provided with a mounting hole matched with the oil suction pipe, and a central oil hole for mounting an oil guide vane is arranged in the mounting hole. The oil guide vane has a certain length, and accordingly the central oil hole also needs to have a length longer than the oil guide vane. The pump oil amount of the compressor is related to the lead of the oil guide vane, and is proportional to the diameter of the central hole. Since the demand for oil is different at different positions of the central oil hole at the same time, theoretically, the closer to the position of the oil pool, the greater the demand for oil supply, and the corresponding diameter of the central oil hole is larger. The farther the distance, the smaller the demand for oil supply, and the corresponding diameter of the central oil hole is smaller. Generally, due to process problems, the central oil hole is made to have a larger diameter, and the height is above the highest lateral oil hole of the crankshaft. Because the central oil hole is larger, the strength of the crankshaft is affected, and the bending resistance is reduced. Accordingly, in order to ensure the strength, the diameter of the crankshaft needs to be larger, which increases the friction work of the compressor and affects the performance of the compressor.

[0004] Since one end of the crankshaft in the prior art needs to be immersed in the oil pool, the interference fit sealing is adopted between the muffler and the lower flange, and the high-pressure gas leakage is prone to occur between the lower flange and the muffler, and the like. Therefore, the application researches and designs a compressor pump body assembly and a compressor. SUMMARY

[0005] Therefore, the present application aims to overcome the defects in the prior art that one end of the crankshaft needs to be immersed in the oil pool, and the interference fit sealing between the silencer and the lower flange causes the high-pressure gas to easily leak between the lower flange and the silencer, thereby providing a compressor pump body assembly and a compressor.

[0006] To solve the above problems, the present application provides a compressor pump body assembly, comprising a crankshaft, a first compression assembly, a partition plate and a second compression assembly are sequentially arranged on the crankshaft, a first cavity is formed between the inner wall of the partition plate and the crankshaft, an oil suction pipe is arranged on the partition plate, one end of the oil suction pipe extends into the compressor oil pool, and the other end of the oil suction pipe is in communication with the first cavity, a first outlet is arranged on the crankshaft, the first outlet is in communication with the first cavity, and when the crankshaft rotates, the volume of the first cavity can be compressed to enable the first cavity to extract oil in the compressor oil pool through the oil suction pipe.

[0007] In some embodiments, the crankshaft comprises a first segment, a second segment and a third segment, the second segment is located between the first segment and the third segment, the second segment is opposite to the partition plate, and the cross section of the second segment is polygonal, and when the crankshaft rotates, the first cavity is formed between any side of the second segment and the inner wall of the partition plate.

[0008] In some embodiments, an inlet is arranged on the partition plate, one end of the inlet is in communication with the first cavity, and the other end of the inlet is in communication with the oil suction pipe, a groove is arranged on the partition plate, a sliding piece is arranged in the groove, one end of the sliding piece abuts against the side of the second segment to divide the first cavity into a second cavity and a third cavity, and an elastic piece is arranged between the other end of the sliding piece and the groove.

[0009] In some embodiments, a through hole is arranged on each side of the second segment, one end of the through hole is in communication with the first cavity, and the other end of the through hole is in communication with the first outlet.

[0010] In some embodiments, the first outlet is arranged on the first segment, a second outlet is further arranged on the first segment, the first outlet is located on the crankshaft away from the partition plate relative to the first compression assembly, the second outlet is opposite to the first compression assembly, a third outlet is arranged on the third segment, the third outlet is opposite to the second compression assembly, and the second outlet, the third outlet and the through hole are in communication.

[0011] In some embodiments, an oil conveying channel is arranged in the crankshaft in the axial direction of the crankshaft, one end of the oil conveying channel is in communication with the first outlet, and the other end of the oil conveying channel is in communication with the first cavity.

[0012] In some embodiments, the oil feeding channel has a diameter larger than that of other parts of the oil feeding channel, and a valve body is arranged on the oil feeding pipe.

[0013] In some embodiments, the second compression assembly comprises a second cylinder and a second roller, the second roller is located in the second cylinder, the second roller is arranged on the crankshaft, a second flange is arranged on a side of the second cylinder away from the partition plate, and a second muffler is arranged on the second flange, and an end of the crankshaft is located in the second muffler.

[0014] In some embodiments, the first compression assembly comprises a first cylinder and a first roller, the first roller is located in the first cylinder, the first roller is arranged on the crankshaft, a first flange is arranged on a side of the first cylinder away from the partition plate, and a first muffler is arranged on the first flange.

[0015] The application also provides a compressor comprising the compressor pump body assembly of any one of the preceding.

[0016] The compressor pump body assembly and the compressor provided by the application have the following beneficial effects:

[0017] A first cavity is formed between the inner wall of the partition plate and the crankshaft, and when the crankshaft rotates, a part of the volume of the first cavity is compressed, so that the first cavity extracts oil in the compressor oil pool through the oil feeding pipe, thereby providing lubricating oil for each component of the compressor, and the crankshaft is prevented from extending into the compressor oil pool, so that the muffler can only be in interference fit with the flange, the interference fit seal between the lower muffler and the lower flange is avoided, the lower muffler and the lower flange can be directly sealed, and leakage of the lower muffler is avoided; the lower muffler is not stressed and deformed, and forms a plane seal with the lower flange, thereby avoiding the problem of leakage of high-pressure refrigerant in the existing structure, improving performance, reducing the oil content of the compressor, and allowing the lower muffler and the lower flange handle to be in clearance fit and not in contact, the lower flange is not stressed and deformed, the screw is pre-tightened in place, the reliability of the compression assembly is improved, and displacement of the compression assembly is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be derived from the provided drawings without creative labor.

[0019] The structures, proportions, sizes, etc. shown in the specification are merely used to cooperate with the content disclosed in the specification for understanding and reading by those skilled in the art, and are not used to limit the conditions that can be implemented by the present application, so they do not have technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, which does not affect the effects that can be produced by the present application and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the present application.

[0020] Figure 1 Assembly view of the compressor pump body assembly of the embodiment of the present application;

[0021] Figure 2 For Figure 1 A-A sectional view;

[0022] Figure 3 The state diagram of the second oil discharge hole to the first oil discharge hole in the compressor pump body assembly of the embodiment of the present application;

[0023] Figure 4 Structure diagram of the crankshaft in the compressor pump body assembly of the embodiment of the present application.

[0024] The reference signs are shown as:

[0025] 1, crankshaft; 2, first outlet; 3, first flange; 4, first muffler; 5, second outlet; 6, first cylinder; 7, first cavity; 8, partition; 9, second cylinder; 10, second flange; 11, second muffler; 12, oil delivery channel; 13, sealing element; 14, third outlet; 15, second roller; 16, elastic element; 17, sliding vane; 18, first roller; 19, oil suction pipe; 20, valve body; 21, second cavity; 22, third cavity; 23, inlet; 24, groove; 25, through hole; 26, first section; 27, second section; 28, third section. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. 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 the present application.

[0027] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0028] It should be noted that the terms "and / or" used herein are merely used to associate associated objects, and represent three possible relationships, for example, A and / or B, which can represent three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are in an "or" relationship.

[0029] The relative arrangement of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application, unless otherwise specifically stated. At the same time, it should be understood that the sizes of the various parts shown in the drawings are not drawn in accordance with the actual proportional relationship. The technology, methods and devices known to those skilled in the relevant art can not be discussed in detail, but should be considered as part of the authorized description, if appropriate. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0030] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, unless otherwise stated, and therefore cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0031] For purposes of the description hereinafter, spatial relative terms, such as "above", "below", "upper", "lower", and the like, can be used to describe the relative position of one element or feature to another as illustrated in the figures. It will be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device in the figures is inverted, then a dependent "above" or "up" can be oriented "below" or "down" in the inverted configuration. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatial relative terms used herein interpreted accordingly.

[0032] In addition, it should be noted that the use of "first", "second", and the like, herein does not imply that there are only two of these items nor that these items must be in a particular order. These designations are used herein for the convenience of the reader to identify the different components of the application.

[0033] With reference to the drawings Figures 1 to 4As shown, according to the embodiment of the present application, a compressor pump body assembly is provided, comprising a crankshaft 1, a first compression assembly, a partition plate 8 and a second compression assembly are sequentially arranged on the crankshaft 1, a first cavity 7 is formed between the inner wall of the partition plate 8 and the crankshaft 1, an oil suction pipe 19 is arranged on the partition plate 8, one end of the oil suction pipe 19 extends into a compressor oil pool, and the other end is in communication with the first cavity 7, a first outlet 2 is arranged on the crankshaft 1, the first outlet 2 is in communication with the first cavity 7, and when the crankshaft 1 rotates, part of the volume in the first cavity 7 can be compressed, so that the first cavity 7 extracts oil in the compressor oil pool through the oil suction pipe 19. In the technical scheme, the first cavity 7 is formed between the inner wall of the partition plate 8 and the crankshaft 1, and when the crankshaft 1 rotates, part of the volume in the first cavity 7 can be compressed, so that the first cavity 7 extracts oil in the compressor oil pool through the oil suction pipe 19, thereby providing lubricating oil for each component of the compressor, avoiding the crankshaft extending into the compressor oil pool, so that the muffler can only be interference fit with the flange, preventing the interference fit sealing of the lower muffler and the lower flange, the lower muffler and the lower flange plane can adopt direct sealing, avoiding the leakage of the lower muffler; the lower muffler is not stressed and deformed, and forms a plane seal with the lower flange, avoiding the problem of high-pressure refrigerant leakage in the existing structure, which can improve the performance and reduce the oil content of the compressor, and the gap fit can be used between the lower muffler and the lower flange handle, without contact, the lower flange is not stressed and deformed, the screw is pre-tightened in place, which can improve the reliability of the compression assembly and avoid displacement of the compression assembly.

[0034] In some embodiments, the crankshaft 1 comprises a first section 26, a second section 27 and a third section 28, the second section 27 is located between the first section 26 and the third section 28, the second section 27 is opposite to the partition plate, the cross section of the second section 27 is polygonal, and when the crankshaft 1 rotates, any side of the second section 27 forms the first cavity 7 with the inner wall of the partition plate 8.

[0035] The compressor pump body assembly of the present application is composed of a crankshaft 1, a first flange 3, a first muffler 4, a first cylinder 6, a first roller 18, a partition plate 8, a second cylinder 9, a second roller 15, a second flange 10, a first muffler 4, a sliding vane 17, an elastic member 16 and an oil suction pipe 19, wherein the crankshaft 1 comprises a first section 26 matched with the first flange 3, a second section 27 matched with the partition plate 8 and a third section 28 matched with the second flange 10. At least one first cavity 7 is arranged on the second section 27, and a through hole 25 is arranged on one side of the first cavity 7 and away from the turning direction, and the through hole 25 is communicated with an oil delivery channel 12 of the crankshaft 1. A sealing member 13 is arranged on a section of the oil delivery channel 12 close to an oil pool, and the sealing member 13 can be an oil plug. The oil delivery channel 12 of the crankshaft 1 is communicated with a first outlet 2, a second outlet 5, a third outlet 14 and other outlets respectively. An inlet 23 is arranged on the partition plate 8, and an oil suction pipe 19 is arranged on the partition plate 8. The oil suction pipe 19 has a valve body 20, and the valve body 20 adopts a one-way valve structure. The lower end of the oil suction pipe 19 is immersed in the oil pool.

[0036] In some embodiments, the inlet 23 is communicated with the first cavity 7 at one end and communicated with the oil suction pipe 19 at the other end. A recess 24 is arranged on the partition plate 8, and a sliding vane 17 is arranged in the recess 24. One end of the sliding vane 17 is abutted with an edge of the second section 27 to divide the first cavity 7 into a second cavity 21 and a third cavity 22. An elastic member 16 is arranged between the other end of the sliding vane 17 and the recess 24. In this technical solution, the inlet 23 can be arranged in plurality. Preferably, the cross section of the second section 27 is quadrangular. As shown in the figure, when the crankshaft 1 rotates, the second cavity 21 is an expansion cavity, and the third cavity 22 is a compression cavity. The volume of the third cavity 22 gradually decreases when the crankshaft 1 rotates, so as to extrude the lubricating oil in the third cavity 22 into the through hole 25. At this time, the volume of the second cavity 21 gradually increases, so as to suck in the lubricating oil through the inlet 23. When the volume of the third cavity 22 decreases, the edge of the second section abuts against the sliding vane 17, so as to compress the elastic member 16. When the lubricating oil in the third cavity 22 is discharged, the elastic member 16 drives the sliding vane 17 to extend and keep abutting against the edge of the second section as the crankshaft 1 rotates. The elastic member 16 can be a spring. Figure 2

[0037] In some embodiments, the through hole 25 is arranged on each edge of the second section 27, and one end of the through hole 25 is communicated with the first cavity, and the other end is communicated with the first outlet 2.

[0038] ​The application avoids the interference fit sealing of the lower muffler and the lower flange, which causes the deformation of the lower flange and affects the reliability; the direct sealing scheme of the lower muffler and the lower flange is adopted to avoid the leakage of the lower muffler; and the compressor pump body assembly can improve the strength and bending resistance of the crankshaft, reduce the size of the crankshaft, and improve the performance of the compressor.

[0039] Supposing that the volume of the second cavity 21 is V, the pump oil volume after one expansion and compression is V, supposing that n1 second cavities 21 are arranged on the second section, the pump oil volume per rotation is n1*V, supposing that n2 sliding vanes 17 and inlets 23 are arranged on the partition, the pump oil volume per rotation is n2*V2, and the pump oil volume per rotation can reach n1*n2*V.

[0040] In some embodiments, the first outlet 2 is arranged on the first section 26, and a second outlet 5 is also arranged on the first section 26, the first outlet 2 is located away from the partition 8 on the crankshaft 1 relative to the first compression assembly, the second outlet 5 is opposite to the first compression assembly, a third outlet 14 is arranged on the third section 28, the third outlet 14 is opposite to the second compression assembly, and the second outlet 5, the third outlet 14 and the through hole 25 are in communication. In this technical solution, the through hole 25, the second outlet 5, the third outlet 14 and the first outlet 2 are arranged along the radial direction of the crankshaft 1, the second muffler 11 is connected to the second flange 10 through screws, the second muffler 11 is not provided with an opening, and the second muffler 11 can completely wrap the second flange 10; the sliding vane 17 is in contact with the crankshaft 1, so that the first cavity 7 is divided into two cavities, i.e., the second cavity 21 connected to the inlet 23 and the third cavity 22 in communication with the through hole 25, as shown in Figs. Figure 2 and Figure 3 When the crankshaft 1 rotates, the second cavity 21 gradually increases, and the third cavity 22 gradually decreases, the second cavity 21 stores the refrigeration oil by forming a low pressure and sucking the refrigeration oil from the oil suction pipe 19, when it rotates to Figure 3 As shown in Fig.

[0041] In some embodiments, an oil delivery channel 12 is arranged in the crankshaft 1 along the axial direction of the crankshaft 1, one end of the oil delivery channel 12 is communicated with the first outlet 2, and the other end is communicated with the first cavity 7. In this technical solution, the oil delivery channel 12 is communicated with the through hole 25, and the oil in the first cavity 7 is discharged from the first outlet 2 through the oil delivery channel 12, thereby providing lubricating oil for each component of the compressor. When the oil delivery channel 12 penetrates the crankshaft 1 towards the end of the compressor oil pool, a sealing member 13 can be arranged at the end of the crankshaft 1 towards the compressor oil pool, so that the oil in the oil pool can only flow into the first cavity 7 through the oil suction pipe 19, thereby providing lubricating oil for each component of the compressor, avoiding the crankshaft extending into the compressor oil pool, and thereby making the silencer only interference fit with the flange.

[0042] In some embodiments, the diameter of the oil delivery channel 12 at the opposite part of the partition plate 8 is greater than that of other parts, and a valve body 20 is arranged on the oil suction pipe 19. In this technical solution, the crankshaft 1 is increased with a second section 27, which can improve the bending strength of the crankshaft 1, and the position of pumping oil is located at the second section 27, and the oil is pumped upward and downward through the oil delivery channel 12 of the crankshaft 1. The first cavity 7 has the largest demand for oil relative to the oil delivery channel 12 of the crankshaft 1, and the corresponding oil delivery channel 12 has the largest diameter. Compared with the existing solution, the one-way demand is reduced by half, and the area of the oil delivery channel 12 can be correspondingly reduced by half. Therefore, under the condition of ensuring the original crankshaft strength, the shaft diameter of the crankshaft can be made smaller, the friction work is reduced, the performance is improved, and the material cost is reduced.

[0043] In some embodiments, the second compression assembly includes a second cylinder 9 and a second roller 15, the second roller 15 is located in the second cylinder 9, the second roller 15 is arranged on the crankshaft 1, the second cylinder 9 is provided with a second flange 10 on the side away from the partition plate 8, the second flange 10 is provided with a second silencer 11, and the end of the crankshaft 1 is located in the second silencer 11. In this technical solution, since the crankshaft 1 does not need to extend into the compressor oil pool, the end of the crankshaft 1 is located in the cavity formed between the second silencer 11 and the second flange 10, there is a gap between the inner wall of the second silencer 11 and the shank of the second flange 10, the second silencer 11 and the second flange 10 can be fixed on the second flange 10 by bolts, of course, other ways such as welding can also be used to fix on the second flange 10, therefore, the second silencer 11 is not stressed and does not deform, forms a plane seal with the second flange 10, avoids the problem of high-pressure refrigerant leakage under the existing structure, can improve the performance and reduce the oil content of the compressor, and at the same time, the second silencer 11 and the second flange 10 are gap fit without contact, the second flange 10 is not stressed and does not deform, the screw is pre-tightened in place, the reliability of the pump body can be improved, and the displacement of the pump body can be avoided. The third section 28 is opposite to the second flange 10.

[0044] In some embodiments, the first compression assembly comprises a first cylinder 6 and a first roller 18, the first roller 18 being located in the first cylinder 6, the first roller 18 being arranged on the crankshaft 1, the first cylinder 6 being arranged with a first flange 3 on a side opposite to the partition plate 8, the first flange 3 being arranged with a first muffler 4.

[0045] In the present application, the second muffler 11 can be completely dense with the second flange 10, and has a pump oil structure, the pump oil structure comprising: the crankshaft being arranged with a first section 26 cooperating with the first flange 3, a third section 28 cooperating with the second flange 10, and a second section 27 cooperating with the partition plate 8, the second section 27 being arranged with at least one first cavity 7 and a through hole 25, the corresponding partition plate 8 being arranged with a recess 24 and an inlet 23, the recess 24 being arranged with a sliding sheet 17 and an elastic member 16, and the inlet 23 being arranged with an oil suction pipe 19.

[0046] The present application further provides a compressor comprising the compressor pump body assembly of any one of the preceding items.

[0047] It is easy for those skilled in the art to understand that the above-mentioned advantageous modes can be freely combined and superimposed without conflict.

[0048] The above is only the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application. The above is only the preferred embodiment of the present application, and it should be pointed out that, for ordinary skilled in the art, without departing from the technical principle of the present application, a number of improvements and variations can be made, and these improvements and variations should be regarded as the protection scope of the present application.

Claims

1. A compressor pump body assembly characterized by, The crankshaft (1) is provided with a first compression assembly, a partition plate (8) and a second compression assembly in sequence, a first cavity (7) is formed between the inner wall of the partition plate (8) and the crankshaft (1), an oil suction pipe (19) is arranged on the partition plate (8), one end of the oil suction pipe (19) extends into a compressor oil pool, and the other end is connected with the first cavity (7), a first outlet (2) is arranged on the crankshaft (1) and connected with the first cavity (7), and when the crankshaft (1) rotates, the volume of the first cavity (7) can be compressed, so that the first cavity (7) extracts oil in the compressor oil pool through the oil suction pipe (19).

2. A compressor pump body assembly as set forth in claim 1 wherein, The crankshaft (1) comprises a first section (26), a second section (27) and a third section (28), the second section (27) is located between the first section (26) and the third section (28), the second section (27) is opposite to the partition plate, the cross section of the second section (27) is polygonal, and when the crankshaft (1) rotates, any side of the second section (27) and the inner wall of the partition plate (8) form the first cavity (7).

3. A compressor pump body assembly as set forth in claim 2 wherein, An inlet (23) is arranged on the partition plate (8), one end of the inlet (23) is connected with the first cavity (7), the other end is connected with the oil suction pipe (19), a groove (24) is arranged on the partition plate (8), a sliding piece (17) is arranged in the groove (24), one end of the sliding piece (17) abuts against the side of the second section (27), so that the first cavity (7) is divided into a second cavity (21) and a third cavity (22), and an elastic piece (16) is arranged between the other end of the sliding piece (17) and the groove (24).

4. A compressor pump body assembly as set forth in claim 2 wherein, A through hole (25) is arranged on each side of the second section (27), one end of the through hole (25) is connected with the first cavity, and the other end is connected with the first outlet (2).

5. A compressor pump body assembly as set forth in claim 4 wherein, The first outlet (2) is arranged on the first section (26), a second outlet (5) is further arranged on the first section (26), the first outlet (2) is located at a position, which is away from the partition plate (8) on the crankshaft (1) and relative to the first compression assembly, the second outlet (5) is opposite to the first compression assembly, a third outlet (14) is arranged on the third section (28) and opposite to the second compression assembly, and the second outlet (5), the third outlet (14) and the through hole (25) are connected.

6. A compressor pump body assembly as set forth in claim 1 wherein, An oil conveying channel (12) is arranged in the crankshaft (1) in the axial direction, one end of the oil conveying channel (12) is connected with the first outlet (2), and the other end is connected with the first cavity (7).

7. A compressor pump body assembly as set forth in claim 6 wherein, The diameter of the part of the oil conveying channel (12) opposite to the partition plate (8) is greater than that of other parts, and a valve body (20) is arranged on the oil suction pipe (19).

8. A compressor pump body assembly as set forth in claim 1 wherein, The second compression assembly comprises a second cylinder (9) and a second roller (15), the second roller (15) is located in the second cylinder (9), the second roller (15) is arranged on the crankshaft (1), a second flange (10) is arranged on the side of the second cylinder (9) away from the partition plate (8), a second muffler (11) is arranged on the second flange (10), and the end of the crankshaft (1) is located in the second muffler (11).

9. A compressor pump body assembly as set forth in claim 1 wherein, The first compression assembly comprises a first cylinder (6) and a first roller (18), the first roller (18) is located in the first cylinder (6), the first roller (18) is arranged on the crankshaft (1), a first flange (3) is arranged on the side of the first cylinder (6) away from the partition plate (8), and a first muffler (4) is arranged on the first flange (3).

10. A compressor characterized by, A compressor pump body assembly comprising any one of claims 1 to 9.

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