Pump body assembly and fluid machinery having the same

Abstract

The present invention provides a pump body assembly and a fluid machine having the same. Among them, the pump body assembly includes: a cylinder, having an air inlet portion, an inner cavity and a sliding vane groove, both the air inlet portion and the sliding vane groove communicate with the inner cavity; a crankshaft, including a long shaft section, an eccentric section and a short shaft section connected in sequence, the eccentricity of the eccentric section is e; a roller assembly, located in the inner cavity, the roller assembly includes a first roller and a second roller, the first roller is sleeved outside the eccentric section, and the second roller is sleeved outside the first roller; a sliding vane, arranged in the sliding vane groove, and the end of the sliding vane contacts the second roller; wherein, the first roller includes at least two arc segments, and adjacent two arc segments are mutually attached to form the first roller by surrounding, and each arc segment is coaxially arranged. The present invention effectively solves the problem that the rolling rotor type compressor in the prior art cannot have both a small size and a large displacement.

Description

Technical Field

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

[0002] At present, rolling rotor compressors are widely used in the field of refrigeration and air conditioning. Among them, the dimensional relationship between the eccentric part of the crankshaft and the roller directly affects the overall occupied space of the rolling rotor compressor.

[0003] In the prior art, in order to ensure that the roller can be sleeved outside the eccentric part of the crankshaft, the following relationship needs to be satisfied among the radius R of the eccentric part e , the eccentricity e of the eccentric part, the radius R1 of the long shaft section of the crankshaft, and the radius R2 of the short shaft section of the crankshaft: R e -e > min(R1, R2), and min(R1, R2) is the minimum value between R1 and R2.

[0004] However, if a miniaturized design of the rolling rotor compressor is to be achieved, the radius R of the eccentric part needs to be reduced. e , in order to satisfy the above relationship, the eccentricity e is reduced accordingly, resulting in a reduction in the displacement of the rolling rotor compressor and a decrease in the working efficiency; if the displacement of the rolling rotor compressor is to be increased, the eccentricity e needs to be increased. In order to satisfy the above relationship, the radius R of the eccentric part e increases accordingly, resulting in an increase in the overall occupied space of the rolling rotor compressor. Therefore, the above settings result in the rolling rotor compressor being unable to combine the two characteristics of a small size and a large displacement and being unable to meet the usage requirements. Summary of the Invention

[0005] The main object of the present invention is to provide a pump body assembly and a fluid machinery having the same, so as to solve the problem that the rolling rotor compressor in the prior art cannot combine a small size and a large displacement.

[0006] To achieve the above object, according to one aspect of the present invention, a pump body assembly is provided, including: a cylinder having an air inlet part, an inner cavity, and a sliding vane groove, the air inlet part and the sliding vane groove are both communicated with the inner cavity; a crankshaft including a long shaft section, an eccentric section, and a short shaft section connected in sequence, the eccentricity of the eccentric section is e; a roller assembly located in the inner cavity, the roller assembly includes a first roller and a second roller, the first roller is sleeved outside the eccentric section, and the second roller is sleeved outside the first roller; a sliding vane disposed in the sliding vane groove, and an end of the sliding vane contacts the second roller; wherein, the first roller includes at least two arc segments, and adjacent two arc segments are mutually attached to surround and form the first roller, and each arc segment is coaxially arranged.

[0007] Further, the crankshaft further includes a first transition connection section and a second transition connection section. The long shaft section is connected to the eccentric section through the first transition connection section, and the short shaft section is connected to the eccentric section through the second transition connection section. Among them, the first transition connection section is inclined with respect to the long shaft section, and the second transition connection section is inclined with respect to the short shaft section.

[0008] Further, the radius R of the eccentric section e , the radius R of the second roller X , the radius R1 of the long shaft section, and the radius R2 of the short shaft section satisfy the following relationship: 2R X -R e -e > min(R1, R2); where min(R1, R2) is the minimum value between the radius R1 and the radius R2.

[0009] Further, at least two arc segments include a first arc segment and a second arc segment, and the central angles of the first arc segment and the second arc segment are the same.

[0010] Further, the first roller has a through hole, and the through hole extends along the radial direction of the crankshaft. Among them, there are multiple through holes, and the multiple through holes are arranged at intervals along the circumferential direction and / or the height direction of the first roller.

[0011] Further, along the height direction of the arc segment, the inner surface of the arc segment includes a first tapered surface, an arc surface, and a second tapered surface connected in sequence. A first included angle B is provided between the first tapered surface and the arc surface, and a second included angle C is provided between the eccentric section and the first transition connection section. The first included angle B is less than or equal to the second included angle C. A third included angle D is provided between the second tapered surface and the arc surface, and a fourth included angle E is provided between the eccentric section and the second transition connection section. The third included angle D is less than or equal to the fourth included angle E.

[0012] Further, the crankshaft has a liquid passing channel. The first transition connection section has a first liquid outlet hole, and the second transition connection section has a second liquid outlet hole. The liquid passing channel is communicated with both the first liquid outlet hole and the second liquid outlet hole.

[0013] Further, the liquid passing channel includes a first channel, a second channel, a third channel, and a fourth channel. The first channel is communicated with the second channel, and one end of the second channel away from the first channel is the second liquid outlet hole. The second channel is communicated with the third channel, the third channel is communicated with the fourth channel, and one end of the third channel away from the fourth channel is the first liquid outlet hole.

[0014] Further, the first channel is arranged on the long shaft section and is coaxially arranged with the long shaft section, and the fourth channel is arranged on the short shaft section and is coaxially arranged with the short shaft section.

[0015] Further, the eccentric section has a third liquid outlet hole, and the third liquid outlet hole communicates with the liquid passing channel; wherein, the first liquid outlet hole and the second liquid outlet hole are arranged in parallel with each other, and the second liquid outlet hole and the third liquid outlet hole are arranged in parallel with each other.

[0016] Further, the length of the liquid passing channel is the same as the length of the crankshaft, and the liquid passing channel is eccentrically arranged within the long shaft section and the short shaft section.

[0017] According to another aspect of the present invention, there is provided a fluid machine, including the above-mentioned pump body assembly.

[0018] Applying the technical solution of the present invention, the roller assembly includes a first roller and a second roller. The first roller is sleeved outside the eccentric section, and the second roller is sleeved outside the first roller. Moreover, the first roller includes at least two arc-shaped sections, and two adjacent arc-shaped sections are arranged in contact with each other to surround and form the first roller. In this way, during the installation process of the roller assembly and the eccentric section, the second roller can be first sleeved on the eccentric section, and then at least two arc-shaped sections are sequentially installed between the eccentric section and the second roller to achieve the assembly of the roller assembly and the crankshaft. Among them, at least two arc-shaped sections are butted to form the first roller, so that the installation of the first roller and the crankshaft breaks through the traditional installation dimension requirements (the radius R of the eccentric part e , the eccentricity e of the eccentric part, the radius R1 of the long shaft section of the crankshaft, and the radius R2 of the short shaft section of the crankshaft need to satisfy R e -e>min(R1,R2)), thereby solving the problem that the rolling rotor type compressor in the prior art cannot have both a small size and a large displacement. When the radius R of the eccentric part e remains unchanged, the eccentricity e can be increased, thereby increasing the displacement of the compressor and improving the working efficiency of the compressor. Description of the Drawings

[0019] The specification 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 to the present invention. In the drawings:

[0020] Figure 1 A cross-sectional view of the first embodiment of the pump body assembly according to the present invention is shown;

[0021] Figure 2 Shown Figure 1 A cross-sectional view of the pump body assembly in another plane in

[0022] Figure 3 Shown Figure 1 A cross-sectional view of the crankshaft and the roller assembly of the pump body assembly in

[0023] Figure 4 Shown Figure 3The A-A cross-sectional view after the crankshaft of the pump body assembly and the roller assembly are assembled;

[0024] Figure 5 Shows Figure 3 The exploded view of the crankshaft and the roller assembly of the pump body assembly in ;

[0025] Figure 6 Shows Figure 5 The front view of the crankshaft of the pump body assembly in ;

[0026] Figure 7 Shows Figure 5 The cross-sectional view of the first arc segment of the pump body assembly in ;

[0027] Figure 8 Shows Figure 5 The installation step diagram of the crankshaft and the roller assembly of the pump body assembly in ;

[0028] Figure 9 Shows Figure 5 The cross-sectional view of the first arc segment of the pump body assembly in another plane in ;

[0029] Figure 10 Shows Figure 5 The cross-sectional view of the crankshaft of the pump body assembly in ; and

[0030] Figure 11 Shows the cross-sectional view of the crankshaft of the pump body assembly according to the second embodiment of the pump body assembly of the present invention.

[0031] Wherein, the above-mentioned drawings include the following reference numerals:

[0032] 10, cylinder; 11, intake part; 12, inner cavity; 13, sliding vane groove; 20, crankshaft; 21, long shaft section; 22, eccentric section; 221, third liquid outlet hole; 23, short shaft section; 24, first transition connection section; 241, first liquid outlet hole; 25, second transition connection section; 251, second liquid outlet hole; 26, liquid passing channel; 261, first channel; 262, second channel; 263, third channel; 264, fourth channel; 30, first roller; 31, arc segment; 311, first arc segment; 312, second arc segment; 313, first conical surface; 314, arc surface; 315, second conical surface; 32, through hole; 40, second roller; 50, sliding vane; 60, upper flange; 70, lower flange. Detailed implementation manners

[0033] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the 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 those commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0035] In the present invention, unless otherwise stated, the orientation terms such as "upper" and "lower" are generally in reference to the directions shown in the drawings, or in the vertical, perpendicular or gravitational directions; similarly, for the convenience of understanding and description, "left" and "right" are generally in reference to the left and right shown in the drawings; "inner" and "outer" refer to the inner and outer of the contour of each component itself, but the above orientation terms are not used to limit the present invention.

[0036] In order to solve the problem that the existing rolling rotor compressor cannot have both a small size and a large displacement, the present application provides a pump body assembly and a fluid machine having the same.

[0037] Embodiment 1

[0038] As Figures 1 to 10 shown, the pump body assembly includes a cylinder 10, a crankshaft 20, a roller assembly and a sliding vane 50. The cylinder 10 has an air inlet portion 11, an inner cavity 12 and a sliding vane groove 13, and both the air inlet portion 11 and the sliding vane groove 13 communicate with the inner cavity 12. The crankshaft 20 includes a long shaft section 21, an eccentric section 22 and a short shaft section 23 connected in sequence, and the eccentricity of the eccentric section 22 is e. The roller assembly is located in the inner cavity 12, and the roller assembly includes a first roller 30 and a second roller 40. The first roller 30 is sleeved outside the eccentric section 22, and the second roller 40 is sleeved outside the first roller 30. The sliding vane 50 is arranged in the sliding vane groove 13, and the end of the sliding vane 50 contacts the second roller 40. Wherein, the first roller 30 includes at least two arc segments 31, and two adjacent arc segments 31 are arranged in contact with each other to surround and form the first roller 30, and each arc segment 31 is coaxially arranged.

[0039] Applying the technical solution of the present invention, during the installation process of the roller assembly and the eccentric section 22, the second roller 40 can be first sleeved on the eccentric section 22, and then at least two arc segments 31 are sequentially installed between the eccentric section 22 and the second roller 40 to realize the assembly of the roller assembly and the crankshaft 20. Wherein, at least two arc segments 31 are butted to form the first roller 30, so that the installation of the first roller 30 and the crankshaft 20 breaks through the traditional installation dimension requirements (the radius R of the eccentric part e , the eccentricity e of the eccentric part, the radius R1 of the long shaft section of the crankshaft and the radius R2 of the short shaft section of the crankshaft need to satisfy R e -e>min(R1,R2)), thereby solving the problem that the existing rolling rotor compressor cannot have both a small size and a large displacement. Without changing the radius R of the eccentric part e , the eccentricity e can be increased, thereby increasing the displacement of the compressor and improving the working efficiency of the compressor.

[0040] In this embodiment, due to the detachable design of the first roller 30, even if R e -e ≤ min(R1, R2), the first roller 30 can still be installed on the crankshaft 20. Furthermore, the pump body assembly breaks through the traditional installation size requirements, and the radius R of the eccentric section 22 can be reduced without changing the eccentricity e e , so as to achieve the miniaturized design of the pump body assembly and reduce the processing cost. At the same time, the above settings can also reduce the relative sliding speed of the upper and lower flanges of the pump body assembly, thereby reducing the frictional power consumption.

[0041] It should be noted that the eccentricity e of the eccentric section 22 is the shortest distance between the central axis of the eccentric section and the central axis of the long shaft section 21. The long shaft section 21 and the short shaft section 23 are coaxially arranged.

[0042] As Figure 1 , Figure 3 , Figure 5 , Figure 6 and Figure 10 shown, the crankshaft 20 further includes a first transition connection section 24 and a second transition connection section 25. The long shaft section 21 is connected to the eccentric section 22 through the first transition connection section 24, and the short shaft section 23 is connected to the eccentric section 22 through the second transition connection section 25. Among them, the first transition connection section 24 is inclined relative to the long shaft section 21, and the second transition connection section 25 is inclined relative to the short shaft section 23. In this way, without increasing the radius R e of the eccentric section 22, the above settings increase the value of the eccentricity e, thereby realizing the design of a large displacement of the pump body assembly. At the same time, the above settings make the structure of the crankshaft 20 simpler, easier to process and realize, and reduce the processing cost of the crankshaft 20.

[0043] In this embodiment, both the first transition connection section 24 and the second transition connection section 25 are shaft sections.

[0044] It should be noted that the first transition connection section 24 being inclined relative to the long shaft section 21 means that the central axis of the first transition connection section 24 and the central axis of the long shaft section 21 form an included angle.

[0045] It should be noted that the second transition connection section 25 being inclined relative to the short shaft section 23 means that the central axis of the second transition connection section 25 and the central axis of the short shaft section 23 form an included angle.

[0046] As Figures 2 to 4 shown, the radius R e of the eccentric section 22, the radius R X of the second roller 40, the radius R1 of the long shaft section 21 and the radius R2 of the short shaft section 23 satisfy the following relationship: 2R X -Re -e > min(R1, R2). Here, min(R1, R2) is the minimum value between radius R1 and radius R2. In this way, the above setting ensures that the second roller 40 can be sleeved on the eccentric section 22 and ensures that the first roller 30 is located between the eccentric section 22 and the second roller 40, improving the disassembly and assembly reliability of the pump body assembly.

[0047] Specifically, the first roller 30 is a split structure formed by docking two arc segments 31, the second roller 40 is a complete ring structure, and the first roller 30 is located inside the second roller 40 and cooperates with the second roller 40.

[0048] Optionally, at least two arc segments 31 include a first arc segment 311 and a second arc segment 312, and the central angles of the first arc segment 311 and the second arc segment 312 are the same. In this way, on the one hand, the above setting makes the structure of the first roller 30 simpler, easier to process and realize, reducing the processing cost of the first roller 30; on the other hand, it makes the disassembly and assembly of the first arc segment 311 and the second arc segment 312 easier and simpler, reducing the disassembly and assembly difficulty.

[0049] In this embodiment, the central angles of the first arc segment 311 and the second arc segment 312 are both 180°, and the first arc segment 311 and the second arc segment 312 are spliced together to form a ring structure. When the first roller 30 needs to be installed between the second roller 40 and the eccentric section 22, the first arc segment 311 can be installed first, and then the second arc segment 312 can be installed, so that the disassembly and assembly of the first roller 30 are not limited by size.

[0050] It should be noted that the number of arc segments 31 is not limited to this and can be adjusted according to working conditions and usage requirements. Optionally, the arc segment 31 is three, or four, or five, or more.

[0051] As Figure 9 shown, the first roller 30 has a through hole 32, and the through hole 32 extends along the radial direction of the crankshaft 20. In this way, on the one hand, the through hole 32 plays a role in weight reduction, reducing the overall weight of the first roller 30 and realizing the lightweight design of the pump body assembly; on the other hand, it plays a role in liquid passing, and the lubricating medium can enter between the second roller 40 and the first roller 30 through the through hole 32, thereby reducing the friction force between the first roller 30 and the second roller 40 and extending the service life of the pump body assembly.

[0052] Optionally, there are multiple through holes 32, and the multiple through holes 32 are arranged at intervals along the circumferential direction and / or the height direction of the first roller 30. In this way, the above arrangement makes the processing of the through holes 32 more flexible to meet different working conditions and usage requirements. At the same time, the above arrangement ensures that the lubricating medium can enter between the first roller 30 and the second roller 40 through the through holes 32, improving the lubrication reliability of the lubricating medium for the pump body assembly.

[0053] In this embodiment, the through hole 32 extends along the radial direction of the first roller 30 and penetrates the inner and outer surfaces of the first roller 30.

[0054] As Figure 6 , Figure 7 and Figure 9 shown, along the height direction of the arc segment 31, the inner surface of the arc segment 31 includes a first conical surface 313, an arc surface 314 and a second conical surface 315 that are sequentially connected. A first included angle B is provided between the first conical surface 313 and the arc surface 314, and a second included angle C is provided between the eccentric segment 22 and the first transition connection segment 24. The first included angle B is less than or equal to the second included angle C. A third included angle D is provided between the second conical surface 315 and the arc surface 314, and a fourth included angle E is provided between the eccentric segment 22 and the second transition connection segment 25. The third included angle D is less than or equal to the fourth included angle E. In this way, the above arrangement avoids structural interference between the first conical surface 313 and the first transition connection segment 24, and between the second conical surface 315 and the second transition connection segment 25, which affects the normal operation of the pump body assembly, and improves the operation reliability of the pump body assembly.

[0055] Specifically, the arc surface 314 is arranged in a fitting manner with the outer surface of the eccentric segment 22, and there is a gap between the first conical surface 313 and the first transition connection segment 24, and there is a gap between the second conical surface 315 and the second transition connection segment 25 to ensure that the eccentric segment 22 can drive the first roller 30 to move. In this way, during the operation of the pump body assembly, the first roller 30 revolves around the central axis of the cylinder 10 with the eccentric segment 22 and rotates around its own central axis at the same time. The second roller 40 also revolves around the central axis of the cylinder 10 and rotates around its own central axis under the drive of the first roller 30. Due to the existence of the rotation, the relative sliding speeds between the first roller 30 and the eccentric segment 22, between the first roller 30 and the second roller 40, and between the second roller 40 and the inner circle of the cylinder 10 are significantly reduced, thereby reducing the frictional power consumption between the cylinder 10 and the upper flange 60 and between the cylinder 10 and the lower flange 70. Among them, the second roller 40 can well avoid the leakage of the roller assembly that may be caused by the first roller 30, improving the reliability of the pump body structure.

[0056] In this embodiment, the first included angle B, the second included angle C, the third included angle D and the fourth included angle E are all obtuse angles.

[0057] It should be noted that the second included angle C is the included angle formed between the central axis of the eccentric section 22 and the central axis of the first transition connection section 24.

[0058] It should be noted that the fourth included angle E is the included angle formed between the central axis of the eccentric section 22 and the central axis of the second transition connection section 25.

[0059] As Figure 10 shown, the crankshaft 20 has a liquid passage 26. The first transition connection section 24 has a first liquid outlet hole 241, and the second transition connection section 25 has a second liquid outlet hole 251. The liquid passage 26 is in communication with both the first liquid outlet hole 241 and the second liquid outlet hole 251. In this way, during the operation of the pump body assembly, the lubricating medium can enter the liquid passage 26 from the lower end of the liquid passage 26 and can be discharged through the first liquid outlet hole 241 and the second liquid outlet hole 251, so as to lubricate between the crankshaft 20 and the upper flange 60, between the crankshaft 20 and the lower flange 70, and between the roller assembly and the cylinder 10, thereby reducing the frictional energy consumption of the pump body assembly and improving the working efficiency of the pump body assembly.

[0060] As Figure 10 shown, the liquid passage 26 includes a first passage 261, a second passage 262, a third passage 263, and a fourth passage 264. The first passage 261 is in communication with the second passage 262. One end of the second passage 262 away from the first passage 261 is the second liquid outlet hole 251. The second passage 262 is in communication with the third passage 263, and the third passage 263 is in communication with the fourth passage 264. One end of the third passage 263 away from the fourth passage 264 is the first liquid outlet hole 241. In this way, on the one hand, the above settings ensure that the lubricating medium entering the liquid passage 26 can be discharged from the first liquid outlet hole 241 and the second liquid outlet hole 251, improving the lubrication efficiency of the lubricating medium; on the other hand, the structure of the liquid passage 26 is made simpler, easier to process and implement, and the processing cost of the crankshaft 20 is reduced.

[0061] Specifically, the first passage 261 and the second passage 262 are arranged at an included angle, the third passage 263 and the fourth passage 264 are arranged at an included angle, the second passage 262 and the third passage 263 are arranged to intersect and communicate with each other, and the first passage 261 is in communication with the fourth passage 264 through the second passage 262 and the third passage 263. In this way, during the operation of the pump body assembly, the lubricating medium first enters the fourth passage 264, then enters the third passage 263. A part of the lubricating medium located in the third passage 263 is discharged from the first liquid outlet hole 241, and another part of the lubricating medium enters the second passage 262. A part of the lubricating medium located in the second passage 262 is discharged from the second liquid outlet hole 251, and another part of the lubricating medium enters the first passage 261, so that the lubricating medium can flow smoothly in the crankshaft 20, improving the lubrication reliability of the lubricating medium.

[0062] As shown Figure 10 in FIG. 1, a first channel 261 is disposed on the long-axis section 21 and is coaxially arranged with the long-axis section 21, and a fourth channel 264 is disposed on the short-axis section 23 and is coaxially arranged with the short-axis section 23. In this way, the above arrangement makes the processing of the first channel 261 and the fourth channel 264 easier and simpler, reducing the processing cost.

[0063] In this embodiment, the installation sequence of the roller assembly is as Figure 8 shown

[0064] follows: First, pass the second roller 40 through the long-axis section 21 or the short-axis section 23 and then sleeved on the eccentric section 22, by controlling the gap between the second roller 40 and the eccentric section 22. Then, load the first arc section 311 from the first side of the first transition connection section 24 into the space between the second roller 40 and the eccentric section 22. At the same time, operate the first arc section 311 to make the first arc section 311 rotate within the second roller 40 to the second side of the first transition connection section 24 (the first side and the second side are oppositely arranged). After that, load the second arc section 312 from the first side of the first transition connection section 24 into the space between the second roller 40 and the eccentric section 22 to complete the assembly. In this way, through the above installation method, it can be ensured that when the second roller 40 satisfies the condition of 2R X -R e -e>min(R1, R2), regardless of the radius Re of the eccentric section 22 being how large, the assembly of the roller assembly can be successfully completed.

[0065] This application also provides a fluid machine (not shown), including the above-mentioned pump body assembly.

[0066] Optionally, the fluid machine is a compressor.

[0067] Embodiment 2

[0068] The difference between the pump body assembly in Embodiment 2 and that in Embodiment 1 lies in: the structure of the liquid passing channel 26 is different.

[0069] As Figure 11 shown, the eccentric section 22 has a third liquid outlet hole 221, and the third liquid outlet hole 221 is communicated with the liquid passing channel 26. Among them, the first liquid outlet hole 241 and the second liquid outlet hole 251 are arranged in parallel with each other, and the second liquid outlet hole 251 and the third liquid outlet hole 221 are arranged in parallel with each other. In this way, the above arrangement makes the oil passage structure on the crankshaft 20 simpler, easier to process and implement, reducing the processing cost of the crankshaft 20. At the same time, the lubricating medium discharged from the third liquid outlet hole 221 can lubricate between the eccentric section 22 and the first roller 30, between the first roller 30 and the second roller 40, and between the second roller 40 and the inner surface of the cylinder 10, so as to reduce the frictional loss of the pump body assembly.

[0070] AsFigure 11 As shown, the length of the liquid passage 26 is the same as the length of the crankshaft 20, and the liquid passage 26 is eccentrically arranged within the long shaft section 21 and the short shaft section 23. Specifically, the central axis of the liquid passage 26 is arranged close to the eccentric section 22, so as to increase the structural thickness between the inner surface of the liquid passage 26 and the outer surface of the eccentric section 22, improve the structural strength of the crankshaft 20, and extend the service life of the pump body assembly.

[0071] It should be noted that the eccentric arrangement of the liquid passage 26 within the long shaft section 21 and the short shaft section 23 means that the central axis of the liquid passage 26 is not coaxial with the central axes of the long shaft section 21 and the short shaft section 23 (they are arranged parallel to each other).

[0072] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0073] During the installation of the roller assembly and the eccentric section, the second roller can be first sleeved on the eccentric section, and then at least two arc sections are sequentially installed between the eccentric section and the second roller to realize the assembly of the roller assembly and the crankshaft. Among them, at least two arc sections are butted to form the first roller, so that the installation of the first roller and the crankshaft breaks through the traditional installation dimension requirements (the radius R of the eccentric part e , the eccentricity e of the eccentric part, the radius R1 of the long shaft section of the crankshaft, and the radius R2 of the short shaft section of the crankshaft need to satisfy R e -e>min(R1,R2)), thereby solving the problem that the existing rolling rotor type compressor cannot have both a small size and a large displacement. When the radius R of the eccentric part e remains unchanged, the eccentricity e can be increased, thereby increasing the displacement of the compressor and improving the working efficiency of the compressor.

[0074] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0075] 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 "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0076] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way 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.

[0077] The above are only the preferred embodiments of the present invention and are not intended 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 within the protection scope of the present invention.

Claims

1. A pump body assembly, characterized in that, Comprising: A cylinder (10) having an air intake portion (11), an inner cavity (12), and a sliding vane groove (13), wherein the air intake portion (11) and the sliding vane groove (13) are both in communication with the inner cavity (12); A crankshaft (20) including a long shaft section (21), an eccentric section (22), and a short shaft section (23) connected in sequence, and the eccentricity of the eccentric section (22) is e; A roller assembly located in the inner cavity (12), the roller assembly including a first roller (30) and a second roller (40), the first roller (30) being sleeved outside the eccentric section (22), and the second roller (40) being sleeved outside the first roller (30); A sliding vane (50) disposed in the sliding vane groove (13), and an end of the sliding vane (50) is in contact with the second roller (40); Wherein, the first roller (30) includes at least two arc segments (31), and two adjacent arc segments (31) are arranged in contact with each other to form the first roller (30) by surrounding, and each arc segment (31) is coaxially arranged; The radius R of the eccentric section (22) e , the radius R of the second roller (40) X , the radius R1 of the long axis section (21) and the radius R2 of the short axis section (23) satisfy the following relationship: 2R X -R e -e > min(R1, R2); where, min(R1, R2) is the minimum value between the radius R1 and the radius R2.

2. The pump body assembly according to claim 1, wherein, The crankshaft (20) further includes a first transition connection section (24) and a second transition connection section (25), the long shaft section (21) is connected to the eccentric section (22) through the first transition connection section (24), and the short shaft section (23) is connected to the eccentric section (22) through the second transition connection section (25); wherein, the first transition connection section (24) is inclined with respect to the long shaft section (21), and the second transition connection section (25) is inclined with respect to the short shaft section (23).

3. The pump body assembly according to claim 1, wherein, The at least two arc segments (31) include a first arc segment (311) and a second arc segment (312), and the central angles of the first arc segment (311) and the second arc segment (312) are the same.

4. The pump body assembly according to claim 1, characterized in that, The first roller (30) has a through hole (32), and the through hole (32) extends along the radial direction of the crankshaft (20); wherein, there are a plurality of through holes (32), and the plurality of through holes (32) are spaced along the circumferential direction and / or the height direction of the first roller (30).

5. The pump body assembly according to claim 2, characterized in that, Along the height direction of the arc segment (31), the inner surface of the arc segment (31) includes a first tapered surface (313), an arc surface (314), and a second tapered surface (315) connected in sequence, a first included angle B is formed between the first tapered surface (313) and the arc surface (314), a second included angle C is formed between the eccentric section (22) and the first transition connection section (24), and the first included angle B is less than or equal to the second included angle C; a third included angle D is formed between the second tapered surface (315) and the arc surface (314), a fourth included angle E is formed between the eccentric section (22) and the second transition connection section (25), and the third included angle D is less than or equal to the fourth included angle E.

6. The pump body assembly according to claim 2, wherein, The crankshaft (20) has a liquid passage (26), the first transition connection section (24) has a first liquid outlet hole (241), the second transition connection section (25) has a second liquid outlet hole (251), and the liquid passage (26) is communicated with both the first liquid outlet hole (241) and the second liquid outlet hole (251).

7. The pump body assembly according to claim 6, wherein, The liquid passage (26) includes a first passage (261), a second passage (262), a third passage (263) and a fourth passage (264). The first passage (261) is communicated with the second passage (262). One end of the second passage (262) away from the first passage (261) is the second liquid outlet hole (251). The second passage (262) is communicated with the third passage (263), the third passage (263) is communicated with the fourth passage (264), and one end of the third passage (263) away from the fourth passage (264) is the first liquid outlet hole (241).

8. The pump body assembly according to claim 7, wherein, The first passage (261) is arranged on the long shaft section (21) and is coaxially arranged with the long shaft section (21), and the fourth passage (264) is arranged on the short shaft section (23) and is coaxially arranged with the short shaft section (23).

9. The pump body assembly according to claim 6, wherein The eccentric section (22) has a third liquid outlet hole (221), and the third liquid outlet hole (221) is communicated with the liquid passage (26). Wherein, the first liquid outlet hole (241) and the second liquid outlet hole (251) are arranged in parallel with each other, and the second liquid outlet hole (251) and the third liquid outlet hole (221) are arranged in parallel with each other.

10. The pump body assembly according to claim 6, wherein, The length of the liquid passage (26) is the same as the length of the crankshaft (20), and the liquid passage (26) is eccentrically arranged within the long shaft section (21) and the short shaft section (23).

11. A fluid machine, characterized in that, Including the pump body assembly according to any one of claims 1 to 10.

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