CN214742065U

CN214742065U - Pump body assembly and fluid machine with same

Info

Publication number: CN214742065U
Application number: CN202120156957.0U
Authority: CN
Inventors: 魏会军; 柳鹏; 余冰; 杨欧翔; 丁少鹏; 赵海红
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai; Zhuhai Gree Energy Saving Environmental Protection Refrigeration Technology Research Center Co Ltd
Priority date: 2021-01-20
Filing date: 2021-01-20
Publication date: 2021-11-16
Anticipated expiration: 2031-01-20

Abstract

The utility model provides a pump body subassembly and have its fluid machinery. Wherein, pump body subassembly includes: the air cylinder is provided with an air inlet part, an inner cavity and a sliding sheet groove, and the air inlet part and the sliding sheet groove are communicated with the inner cavity; the crankshaft comprises a long shaft section, an eccentric section and a short shaft section which are connected in sequence, and the eccentric amount of the eccentric section is e; the roller assembly is positioned in the inner cavity and comprises 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; the sliding sheet is arranged in the sliding sheet groove, and the end part of the sliding sheet is contacted with the second roller; wherein, first roller includes two at least segmental arcs, and adjacent two segmental arcs laminate the setting each other in order to form first roller around forming between the segmental arc, and each segmental arc is coaxial to be set up. The utility model discloses the problem that the rolling rotor formula compressor among the prior art can not have the size concurrently and little and the discharge capacity is big has been solved effectively.

Description

Pump body assembly and fluid machine with same

Technical Field

The utility model relates to a fluid machinery technical field particularly, relates to a pump body subassembly and have its fluid machinery.

Background

At present, the rolling rotor compressor is widely applied to the field of refrigeration and air conditioning. The size relationship between the eccentric part of the crankshaft and the roller directly influences the overall occupied space of the rolling rotor compressor.

In the prior art, in order to ensure that the roller can be sleeved outside the eccentric part of the crankshaft, the radius R of the eccentric part_eEccentricity e of the eccentric portion, and radius R of the long shaft section of the crankshaft₁And the radius R of the short shaft section of the crankshaft₂The following relationship needs to be satisfied: r_e-e>min(R₁,R₂)，min(R₁,R₂) Is R₁And R₂The minimum value in between.

However, in order to achieve a compact design of the rolling rotor compressor, it is necessary to reduce the radius R of the eccentric portion_eIn order to satisfy the above relationship, the eccentricity e is reduced, which reduces the displacement of the rolling rotor compressor and reduces the working efficiency; if the displacement of the rolling rotor compressor is increased, the eccentric amount e needs to be increased, and if the above relationship is satisfied, the radius R of the eccentric portion is increased_eThis is accompanied by an increase in the overall footprint of the rolling rotor compressor. Therefore, the above arrangement cannot satisfy the use requirements because the rolling rotor compressor cannot have both the features of small size and large displacement.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pump body subassembly and have its fluid machinery to the rolling rotor formula compressor of solving among the prior art can not have the problem that the size is little and the discharge capacity is big concurrently.

In order to achieve the above object, according to an aspect of the present invention, there is provided a pump body assembly including: the air cylinder is provided with an air inlet part, an inner cavity and a sliding sheet groove, and the air inlet part and the sliding sheet groove are communicated with the inner cavity; the crankshaft comprises a long shaft section, an eccentric section and a short shaft section which are connected in sequence, and the eccentric amount of the eccentric section is e; the roller assembly is positioned in the inner cavity and comprises 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; the sliding sheet is arranged in the sliding sheet groove, and the end part of the sliding sheet is contacted with the second roller; wherein, first roller includes two at least segmental arcs, and adjacent two segmental arcs laminate the setting each other in order to form first roller around forming between the segmental arc, and each segmental arc is coaxial to be set up.

The crankshaft further comprises a first transition connecting section and a second transition connecting section, the long shaft section is connected with the eccentric section through the first transition connecting section, and the short shaft section is connected with the eccentric section through the second transition connecting section; the first transition connecting section is obliquely arranged relative to the long shaft section, and the second transition connecting section is obliquely arranged relative to the short shaft section.

Further, the radius R of the eccentric section_eRadius R of the second roller_XRadius R of the long shaft section₁And radius R of the stub shaft section₂Satisfies the following relationship: 2R_X-R_e-e>min(R₁,R₂) (ii) a Wherein, min (R)₁,R₂) Is a radius R₁And a radius R₂The minimum value in between.

Further, the at least two arc segments include a first arc segment and a second arc segment, and central angles of the first arc segment and the second arc segment are consistent.

Further, the first roller has a through hole extending in a radial direction of the crankshaft; the through holes are arranged at intervals along the circumferential direction and/or the height direction of the first roller.

Further, along the height direction of the arc-shaped section, the inner surface of the arc-shaped section comprises a first conical surface, an arc-shaped surface and a second conical surface which are connected in sequence, a first included angle B is formed between the first conical surface and the arc-shaped surface, a second included angle C is formed between the eccentric section and the first transition connecting section, and the first included angle B is smaller than or equal to the second included angle C; and a third included angle D is formed between the second conical surface and the arc-shaped surface, a fourth included angle E is formed between the eccentric section and the second transition connecting section, and the third included angle D is smaller than or equal to the fourth included angle E.

Further, the bent axle has the liquid passageway of crossing, and first transition linkage section has first liquid hole, and second transition linkage section has the second and goes out the liquid hole, crosses liquid passageway and first liquid hole and second and goes out liquid hole and all communicate.

Furthermore, the liquid passing channel comprises a first channel, a second channel, a third channel and a fourth channel, the first channel is communicated with the second channel, and a second liquid outlet hole is formed in one end, far away from the first channel, of the second channel; 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, which is far away from the fourth channel, is provided with a first liquid outlet hole.

Furthermore, 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.

Furthermore, the eccentric section is provided with a third liquid outlet hole which is communicated with the liquid passing channel; wherein, first play liquid hole and second play liquid hole parallel arrangement each other, and the second goes out liquid hole and third and goes out liquid hole parallel arrangement each other.

Further, the length of the liquid passing channel is consistent with that of the crankshaft, and the liquid passing channel is eccentrically arranged in the long shaft section and the short shaft section.

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

Use the technical scheme of the utility model, roller assembly includes first roller and second roller, and first roller cover is established outside eccentric section, and the second roller cover is established outside first roller, and just first roller includes two at least segmental arcs, laminates the setting each other between two adjacent segmental arcs in order to form first roller around forming. Thus, rolling overIn the process of mounting the subassembly and the eccentric section, the second roller can be sleeved on the eccentric section, and then at least two arc-shaped sections are sequentially mounted between the eccentric section and the second roller, so that the assembly of the roller assembly and the crankshaft is realized. Wherein at least two arc-shaped sections are butted to form a first roller, so that the installation of the first roller and the crankshaft breaks through the traditional installation size requirement (the radius R of an eccentric part)_eEccentricity e of the eccentric portion, and radius R of the long shaft section of the crankshaft₁And the radius R of the short shaft section of the crankshaft₂Need to satisfy R_e-e>min(R₁,R₂) And then the problem that the rolling rotor type compressor in the prior art cannot have both small size and large displacement is solved, and the radius R of the eccentric part_eUnder the unchangeable condition, the eccentricity e can be increased, so that the displacement of the compressor is increased, and the working efficiency of the compressor is improved.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

figure 1 shows a cross-sectional view of a first embodiment of a pump body assembly according to the present invention;

FIG. 2 shows a cross-sectional view in another plane of the pump body assembly of FIG. 1;

FIG. 3 shows a cross-sectional view of the pump block assembly of FIG. 1 after assembly of the crankshaft and roller assemblies;

FIG. 4 shows a sectional view A-A of the pump block assembly of FIG. 3 after assembly of the crankshaft and roller assemblies;

FIG. 5 shows an exploded view of the crankshaft and roller assembly of the pump body assembly of FIG. 3;

FIG. 6 shows a front view of the crankshaft of the pump block assembly of FIG. 5;

FIG. 7 shows a cross-sectional view of a first arcuate segment of the pump body assembly of FIG. 5;

FIG. 8 is a diagram illustrating the steps of mounting the crankshaft and roller assembly of the pump block assembly of FIG. 5;

FIG. 9 shows a cross-sectional view in another plane of the first arcuate segment of the pump body assembly of FIG. 5;

FIG. 10 shows a cross-sectional view of the crankshaft of the pump block assembly of FIG. 5; and

fig. 11 shows a cross-sectional view of a crankshaft of a pump body assembly according to an embodiment two of the pump body assembly of the present invention.

Wherein the figures include the following reference numerals:

10. a cylinder; 11. an air intake portion; 12. an inner cavity; 13. a slide groove; 20. a crankshaft; 21. a long shaft section; 22. an eccentric section; 221. a third liquid outlet hole; 23. a short shaft section; 24. a first transitional coupling section; 241. a first liquid outlet hole; 25. a second transitional coupling section; 251. a second liquid outlet hole; 26. a liquid passing channel; 261. a first channel; 262. a second channel; 263. a third channel; 264. a fourth channel; 30. a first roller; 31. an arc-shaped section; 311. a first arcuate segment; 312. a second arcuate segment; 313. a first tapered surface; 314. an arc-shaped surface; 315. a second tapered surface; 32. a through hole; 40. a second roller; 50. sliding blades; 60. an upper flange; 70. and a lower flange.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present invention, unless otherwise specified, the use of directional words such as "upper and lower" is generally in reference to the orientation shown in the drawings, or to the vertical, perpendicular or gravitational orientation; likewise, for ease of understanding and description, "left and right" are generally to the left and right as shown in the drawings; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself, but the above directional terms are not intended to limit the present invention.

In order to solve the problem that a rolling rotor type compressor in the prior art cannot have the small size and the large displacement, the application provides a pump body assembly and a fluid machine with the same.

Example one

As shown in fig. 1 to 10, the pump body assembly includes a cylinder 10, a crankshaft 20, a roller assembly, and a vane 50. The cylinder 10 has an air intake portion 11, an inner cavity 12, and a vane groove 13, and both the air intake portion 11 and the 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 eccentric amount of the eccentric section 22 is e. A roller assembly is located in the internal cavity 12, the roller assembly including a first roller 30 and a second roller 40, the first roller 30 being disposed over the eccentric section 22, the second roller 40 being disposed over the first roller 30. The vane 50 is disposed in the vane groove 13, and an end of the vane 50 is in contact with the second roller 40. The first roller 30 includes at least two arc segments 31, two adjacent arc segments 31 are attached to each other to form the first roller 30, and the arc segments 31 are coaxially disposed.

Use the technical scheme of the utility model, at the in-process that roller assembly and eccentric section 22 carried out the installation, can overlap the second roller 40 earlier and establish on eccentric section 22, install two at least segmental arcs 31 between eccentric section 22 and second roller 40 in proper order again to realize roller assembly and bent axle 20's assembly. 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 size requirement (the radius R of the eccentric part)_eEccentricity e of the eccentric portion, and radius R of the long shaft section of the crankshaft₁And the radius R of the short shaft section of the crankshaft₂Need to satisfy R_e-e>min(R₁,R₂) And then the problem that the rolling rotor type compressor in the prior art cannot have both small size and large displacement is solved, and the radius R of the eccentric part_eUnder the unchangeable condition, the eccentricity e can be increased, so that the displacement of the compressor is increased, and the working efficiency of the compressor is improved.

In the present embodiment, even R is due to the detachable design of the first roller 30_e-e≤min(R₁,R₂) It is also possible to mount the first roller 30 on the crankshaft 20, thereby making it possible toThe pump body assembly breaks through the requirement of the traditional installation size, and can reduce the radius R of the eccentric section 22 under the condition that the eccentric amount e is not changed_eIn order to realize the miniaturized design of the pump body assembly and reduce the processing cost. Meanwhile, the arrangement can also reduce the relative sliding speed of the upper flange and the lower flange of the pump body assembly, so that the friction power consumption is reduced.

The eccentric amount 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 segment 21 is arranged coaxially with the short shaft segment 23.

As shown in fig. 1, 3, 5, 6 and 10, the crankshaft 20 further includes a first transition connecting section 24 and a second transition connecting section 25, the long axis section 21 is connected to the eccentric section 22 through the first transition connecting section 24, and the short axis section 23 is connected to the eccentric section 22 through the second transition connecting section 25. Wherein the first transition connection section 24 is arranged obliquely to the long shaft section 21 and the second transition connection section 25 is arranged obliquely to the short shaft section 23. Thus, without increasing the radius R of the eccentric section 22_eOn the premise of increasing the eccentricity e, the large-displacement design of the pump body assembly is realized. Meanwhile, the structure of the crankshaft 20 is simpler, the crankshaft is easy to process and realize, and the processing cost of the crankshaft 20 is reduced.

In the present embodiment, the first transition joint section 24 and the second transition joint section 25 are both shaft sections.

It should be noted that, the first transitional coupling section 24 is disposed obliquely with respect to the long axis section 21, which means that the central axis of the first transitional coupling section 24 is disposed at an angle with respect to the central axis of the long axis section 21.

It should be noted that, the second transitional coupling section 25 is disposed obliquely with respect to the short shaft section 23, which means that the central axis of the second transitional coupling section 25 is disposed at an angle with the central axis of the short shaft section 23.

As shown in fig. 2 to 4, the radius R of the eccentric section 22_eRadius R of the second roller 40_XRadius R of long shaft section 21₁And the radius R of the short axis segment 23₂Satisfies the following relationship: 2R_X-R_e-e>min(R₁,R₂). Wherein, min (R)₁,R₂) Is a radius R₁And a radius R₂The minimum value in between. Thus, the arrangement ensures that the second roller 40 can be sleeved on the eccentric section 22 and the first roller 30 is positioned between the eccentric section 22 and the second roller 40, thereby improving the disassembly and assembly reliability of the pump body assembly.

Specifically, the first roller 30 is a split structure and is formed by abutting two arc-shaped segments 31, the second roller 40 is a complete circular ring structure, and the first roller 30 is located inside the second roller 40 and is matched with the second roller 40.

Optionally, 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 identical. Thus, on one hand, the arrangement makes the structure of the first roller 30 simpler, and the first roller is easy to process and realize, thereby reducing the processing cost of the first roller 30; on the other hand, the first arc-shaped section 311 and the second arc-shaped section 312 are easier and simpler to disassemble and assemble, and the disassembling and assembling difficulty is reduced.

In the present embodiment, the central angles of the first arc-shaped segment 311 and the second arc-shaped segment 312 are both 180 °, and the first arc-shaped segment 311 and the second arc-shaped segment 312 are spliced with each other to form a circular ring structure. When the first roller 30 needs to be installed between the second roller 40 and the eccentric section 22, the first arc-shaped section 311 may be installed first, and then the second arc-shaped section 312 may be installed, so that the first roller 30 is not limited by size in assembly and disassembly.

It should be noted that the number of the arc segments 31 is not limited to this, and can be adjusted according to the working condition and the use requirement. Optionally, the arcuate segments 31 are three, or four, or five, or more.

As shown in fig. 9, the first roller 30 has a through hole 32, and the through hole 32 extends in the radial direction of the crankshaft 20. In this way, the through hole 32 plays a role in reducing weight, reducing the overall weight of the first roller 30 and realizing the light-weight design of the pump body assembly; on the other hand, the lubricating medium can enter the space between the second roller 40 and the first roller 30 through the through hole 32, so that the friction force between the first roller 30 and the second roller 40 is reduced, and the service life of the pump body assembly is prolonged.

Alternatively, the through-holes 32 are plural, and the plural through-holes 32 are provided at intervals in the circumferential direction and/or the height direction of the first roller 30. Thus, the through hole 32 can be processed more flexibly by the arrangement, so that different use conditions and use requirements can be met. Meanwhile, the arrangement ensures that the lubricating medium can enter between the first roller 30 and the second roller 40 through the through hole 32, and the lubricating reliability of the lubricating medium on the pump body assembly is improved.

In the present embodiment, the through hole 32 extends in the radial direction of the first roller 30 and penetrates the inner and outer surfaces of the first roller 30.

As shown in fig. 6, 7 and 9, 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, which are 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 segment 22 and the first transition connecting segment 24, and the first included angle B is smaller than or equal to the second included angle C. The second taper surface 315 and the arc surface 314 form a third included angle D, the eccentric section 22 and the second transition connection section 25 form a fourth included angle E, and the third included angle D is smaller than or equal to the fourth included angle E. Thus, the arrangement avoids structural interference between the first tapered surface 313 and the first transition connecting section 24 and between the second tapered surface 315 and the second transition connecting section 25 to influence the normal operation of the pump body assembly, and improves the operational reliability of the pump body assembly.

Specifically, the arc surface 314 is disposed to fit the outer surface of the eccentric section 22, a gap is formed between the first tapered surface 313 and the first transitional coupling section 24, and a gap is formed between the second tapered surface 315 and the second transitional coupling section 25, so as to ensure that the eccentric section 22 can drive the first roller 30 to move. Thus, during the operation of the pump block assembly, the first roller 30 revolves around the central axis of the cylinder 10 along with the eccentric section 22 and simultaneously rotates around its own central axis, and the second roller 40 revolves around the central axis of the cylinder 10 and simultaneously rotates around its own central axis under the driving of the first roller 30. Due to the existence of the rotation, the relative sliding speed between the first roller 30 and the eccentric section 22, the first roller 30 and the second roller 40, the second roller 40 and the inner circle of the cylinder 10 is significantly reduced, thereby reducing the friction power consumption between the cylinder 10 and the upper flange 60, and between the cylinder 10 and the lower flange 70. The second roller 40 can well avoid the leakage of the roller assembly possibly caused by the first roller 30, and the reliability of the pump body structure is improved.

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.

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

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

As shown in fig. 10, the crankshaft 20 has a liquid passing channel 26, the first transition connecting section 24 has a first liquid outlet 241, the second transition connecting section 25 has a second liquid outlet 251, and the liquid passing channel 26 is communicated with the first liquid outlet 241 and the second liquid outlet 251. Like this, in the pump body subassembly operation in-process, in the lubricant can enter into to crossing liquid channel 26 through the lower extreme that crosses liquid channel 26 to the accessible is discharged first liquid hole 241 and second liquid hole 251, in order to be used for lubricating between bent axle 20 and upper flange 60, between bent axle 20 and lower flange 70, between roller assembly and the cylinder 10, and then has reduced the friction energy consumption of pump body subassembly, has promoted the work efficiency of pump body subassembly.

As shown in fig. 10, the liquid passing channel 26 includes a first channel 261, a second channel 262, a third channel 263 and a fourth channel 264, the first channel 261 is communicated with the second channel 262, and one end of the second channel 262 far from the first channel 261 is a second liquid outlet 251. The second channel 262 is communicated with the third channel 263, the third channel 263 is communicated with the fourth channel 264, and one end of the third channel 263 far away from the fourth channel 264 is a first liquid outlet hole 241. Thus, on one hand, the arrangement ensures that the lubricating medium entering the liquid passing channel 26 can be discharged from the first liquid outlet hole 241 and the second liquid outlet hole 251, and the lubricating efficiency of the lubricating medium is improved; on the other hand, the structure of the liquid passing channel 26 is simpler, the processing and the realization are easy, and the processing cost of the crankshaft 20 is reduced.

Specifically, the first channel 261 and the second channel 262 are arranged at an included angle, the third channel 263 and the fourth channel 264 are arranged at an included angle, the second channel 262 and the third channel 263 are arranged in a crossed manner and communicated with each other, and the first channel 261 is communicated with the fourth channel 264 through the second channel 262 and the third channel 263. Thus, in the operation process of the pump body assembly, the lubricating medium firstly enters the fourth channel 264 and then enters the third channel 263, a part of the lubricating medium in the third channel 263 is discharged from the first liquid outlet 241, the other part of the lubricating medium enters the second channel 262, a part of the lubricating medium in the second channel 262 is discharged from the second liquid outlet 251, and the other part of the lubricating medium enters the first channel 261, so that the lubricating medium smoothly flows in the crankshaft 20, and the lubricating reliability of the lubricating medium is improved.

As shown in fig. 10, the first channel 261 is provided on the long shaft segment 21 and is disposed coaxially with the long shaft segment 21, and the fourth channel 264 is provided on the short shaft segment 23 and is disposed coaxially with the short shaft segment 23. Thus, the above arrangement makes the processing of the first channel 261 and the fourth channel 264 easier and simpler, and reduces the processing cost.

In this embodiment, the roller assembly is installed in the sequence shown in fig. 8:

first, the second roller 40 is sleeved on the eccentric section 22 after passing through the long shaft section 21 or the short shaft section 23, and the gap between the second roller 40 and the eccentric section 22 is controlled. The first segment 311 is then loaded from the first side of the first transitional coupling segment 24 between the second roller 40 and the eccentric segment 22, and at the same time, the first segment 311 is manipulated to rotate the first segment 311 within the second roller 40 to the second side of the first transitional coupling segment 24 (the first side being disposed opposite the second side). Thereafter, the second arcuate segment 312 is loaded from the first side of the first transitional coupling segment 24 between the second roller 40 and the eccentric segment 22 to complete the assembly. Thus, the second roller 40 can be ensured to satisfy 2R by the above-described mounting method_X-R_e-e>min(R₁,R₂) The assembly of the roller assembly can be smoothly completed no matter what the radius Re of the eccentric section 22 is.

The present application also provides a fluid machine (not shown) comprising the pump body assembly described above.

Optionally, the fluid machine is a compressor.

Example two

The pump body assembly in the second embodiment is different from the first embodiment in that: the liquid passing channel 26 is different in structure.

As shown in fig. 11, 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. The first liquid outlet 241 and the second liquid outlet 251 are parallel to each other, and the second liquid outlet 251 and the third liquid outlet 221 are parallel to each other. Thus, the arrangement makes the oil circuit structure on the crankshaft 20 simpler, and the processing and implementation are easy, thereby reducing the processing cost of the crankshaft 20. Meanwhile, 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 friction loss of the pump body assembly.

As shown in fig. 11, the length of the fluid passage 26 corresponds to the length of the crankshaft 20, and the fluid passage 26 is eccentrically disposed in the long axis section 21 and the short axis section 23. Specifically, the central axis of the liquid passing channel 26 is arranged close to the eccentric section 22, so that the structural thickness between the inner surface of the liquid passing channel 26 and the outer surface of the eccentric section 22 is increased, the structural strength of the crankshaft 20 is improved, and the service life of the pump body assembly is prolonged.

It should be noted that the liquid passing passage 26 is eccentrically disposed in the long axis segment 21 and the short axis segment 23 means that the central axis of the liquid passing passage 26 is not coaxially disposed (disposed in parallel with each other) with the central axes of the long axis segment 21 and the short axis segment 23.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

in the process of installing the roller assembly and the eccentric section, the second roller can be sleeved on the eccentric section, and then at least two arc-shaped sections are sequentially installed between the eccentric section and the second roller, so that the assembly of the roller assembly and the crankshaft is realized. Wherein at least two arc-shaped sections are butted to form a first roller, so that the installation of the first roller and the crankshaft breaks through the traditional installation size requirement (the radius R of an eccentric part)_eEccentricity e of eccentric part, length of crankshaftRadius R of the shaft section₁And the radius R of the short shaft section of the crankshaft₂Need to satisfy R_e-e>min(R₁,R₂) And then the problem that the rolling rotor type compressor in the prior art cannot have both small size and large displacement is solved, and the radius R of the eccentric part_eUnder the unchangeable condition, the eccentricity e can be increased, so that the displacement of the compressor is increased, and the working efficiency of the compressor is improved.

It is obvious that the above described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pump body assembly, comprising:

the air cylinder (10) is provided with an air inlet part (11), an inner cavity (12) and a sliding sheet groove (13), and the air inlet part (11) and the sliding sheet groove (13) are communicated with the inner cavity (12);

the crankshaft (20) comprises a long shaft section (21), an eccentric section (22) and a short shaft section (23) which are sequentially connected, wherein the eccentric amount of the eccentric section (22) is e;

a roller assembly located in the internal 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), the second roller (40) being sleeved outside the first roller (30);

a slide (50) disposed in the slide groove (13), an end of the slide (50) being in contact with the second roller (40);

the first roller (30) comprises at least two arc-shaped sections (31), the adjacent arc-shaped sections (31) are mutually attached to form the first roller (30) in a surrounding mode, and the arc-shaped sections (31) are coaxially arranged.

2. The pump block assembly according to claim 1, wherein the crankshaft (20) further comprises a first transition connection section (24) and a second transition connection section (25), the long shaft section (21) being connected to the eccentric section (22) by the first transition connection section (24), the short shaft section (23) being connected to the eccentric section (22) by the second transition connection section (25); wherein the first transition connecting section (24) is arranged obliquely relative to the long shaft section (21) and the second transition connecting section (25) is arranged obliquely relative to the short shaft section (23).

3. Pump body assembly according to claim 1, characterized in that the radius R of the eccentric section (22)_eRadius R of the second roller (40)_XRadius R of the long shaft section (21)₁And the radius R of the stub shaft section (23)₂Satisfies the following relationship: 2R_X-R_e-e>min(R₁,R₂) (ii) a Wherein, min: (R₁,R₂) Is a radius R₁And a radius R₂The minimum value in between.

4. The pump body assembly according to claim 1, characterized in that the at least two arc-shaped segments (31) comprise a first arc-shaped segment (311) and a second arc-shaped segment (312), the central angles of the first arc-shaped segment (311) and the second arc-shaped segment (312) being identical.

5. The pump body assembly according to claim 1, characterized in that the first roller (30) has a through hole (32), the through hole (32) extending in a radial direction of the crankshaft (20); wherein, the through-hole (32) is a plurality of, a plurality of through-hole (32) along the circumference of first roller (30) and/or the direction of height interval sets up.

6. The pump body assembly according to claim 2, wherein, along the height direction of the arc-shaped section (31), the inner surface of the arc-shaped section (31) comprises a first conical surface (313), an arc-shaped surface (314) and a second conical surface (315) which are connected in sequence, the first conical surface (313) and the arc-shaped surface (314) are arranged at a first included angle B, the eccentric section (22) and the first transition connection section (24) are arranged at a second included angle C, and the first included angle B is smaller than or equal to the second included angle C; second toper face (315) with be third contained angle D setting between arcwall face (314), eccentric section (22) with be fourth contained angle E setting between second transitional coupling section (25), third contained angle D is less than or equal to fourth contained angle E.

7. The pump body assembly according to claim 2, wherein the crankshaft (20) has a liquid passage channel (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 channel (26) communicates with both the first liquid outlet hole (241) and the second liquid outlet hole (251).

8. The pump body assembly according to claim 7, wherein the liquid passing channel (26) comprises a first channel (261), a second channel (262), a third channel (263) and a fourth channel (264), the first channel (261) is communicated with the second channel (262), and the end, away from the first channel (261), of the second channel (262) is the second liquid outlet hole (251); the second channel (262) is communicated with the third channel (263), the third channel (263) is communicated with the fourth channel (264), and one end, far away from the fourth channel (264), of the third channel (263) is provided with the first liquid outlet hole (241).

9. The pump body assembly according to claim 8, characterized in that the first channel (261) is provided on the long shaft section (21) and coaxially arranged with the long shaft section (21), and the fourth channel (264) is provided on the short shaft section (23) and coaxially arranged with the short shaft section (23).

10. The pump body assembly according to claim 7, characterized in that the eccentric section (22) has a third exit hole (221), the third exit hole (221) communicating with the liquid passage channel (26); the first liquid outlet hole (241) and the second liquid outlet hole (251) are arranged in parallel, and the second liquid outlet hole (251) and the third liquid outlet hole (221) are arranged in parallel.

11. The pump block assembly according to claim 7, characterized in that the length of the passage channel (26) coincides with the length of the crankshaft (20), the passage channel (26) being arranged eccentrically within the long shaft section (21) and the short shaft section (23).

12. A fluid machine, characterized by comprising a pump body assembly according to any one of claims 1 to 11.