Pump body assembly and fluid machinery having the same

Abstract

The present invention provides a pump body assembly and a fluid machinery having the same. The pump body assembly includes: a cylinder having an air inlet, an inner cavity, and a vane slot, wherein the air inlet and the vane slot are both connected to the inner cavity; a first crankshaft including a long shaft section and a first eccentric section connected to the long shaft section; a second crankshaft including a short shaft section and a second eccentric section connected to the short shaft section; a roller located in the inner cavity, the roller being sleeved outside the first eccentric section and the second eccentric section; wherein the eccentricity of the first eccentric section and the eccentricity of the second eccentric section are both e, and the radius of the first eccentric section and the radius of the second eccentric section are equal. The present invention effectively solves the problem in the prior art that rolling rotor compressors cannot achieve both small size and 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] Currently, rolling rotor compressors are widely used in the field of refrigeration and air conditioning. Among them, the size relationship between the eccentric portion of the crankshaft and the roller directly affects the overall space occupied by 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 radius R of the eccentric part is e The following relationship needs to be satisfied between the eccentricity e of the eccentric part, the radius R1 of the long axis section of the crankshaft, and the radius R2 of the short axis section of the crankshaft: R e -e>min(R1,R2), where min(R1,R2) is the minimum value between R1 and R2.

[0004] However, in order to realize the miniaturization design of the rolling rotor compressor, it is necessary to reduce the radius R of the eccentric portion. e In order to satisfy the above relationship, the eccentricity e is reduced, resulting in a reduction in the displacement of the rolling rotor compressor and a reduction in working efficiency. If the displacement of the rolling rotor compressor is increased, the eccentricity e needs to be increased. In order to satisfy the above relationship, the radius R of the eccentric part e As a result, the overall space occupied by the rolling rotor compressor increases. Therefore, the above arrangement causes the rolling rotor compressor to be unable to achieve both the characteristics of small size and large displacement, and cannot meet the use requirements. Summary of the Invention

[0005] The main purpose 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 type compressor in the prior art cannot have both small size and large displacement.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a pump body assembly is provided, comprising: a cylinder, having an air intake portion, an inner cavity and a vane groove, the air intake portion and the vane groove being connected to the inner cavity; a first crankshaft, comprising a long shaft section and a first eccentric section connected to the long shaft section; a second crankshaft, comprising a short shaft section and a second eccentric section connected to the short shaft section; a roller, located in the inner cavity, the roller being sleeved outside the first eccentric section and the second eccentric section; wherein the eccentricity of the first eccentric section and the eccentricity of the second eccentric section are both e, and the radius of the first eccentric section and the radius of the second eccentric section are equal.

[0007] Furthermore, the height H1 of the first eccentric segment and the height H2 of the second eccentric segment satisfy the following relationship: 0.5≤H1 / (H1+H2)≤0.8.

[0008] Furthermore, the pump body assembly also includes: a first transition shaft segment, the long shaft segment is connected to the first eccentric segment through the first transition shaft segment, and the first transition shaft segment and the long shaft segment are arranged at a first angle; an upper flange, arranged above the cylinder, the upper flange has a first through-hole segment and a second through-hole segment that are interconnected, the long shaft segment is passed through the first through-hole segment, and the first transition shaft segment is passed through the second through-hole segment.

[0009] Furthermore, the pump body assembly also includes: a second transition shaft segment, the short shaft segment is connected to the second eccentric segment through the second transition shaft segment, and the second transition shaft segment and the short shaft segment are arranged at a second angle; a lower flange, arranged below the cylinder, the lower flange has a third through-hole segment and a fourth through-hole segment that are interconnected, the short shaft segment is passed through the third through-hole segment, and the second transition shaft segment is passed through the fourth through-hole segment.

[0010] Furthermore, the first eccentric segment and the second eccentric segment are coaxially arranged.

[0011] Furthermore, a first positioning portion is provided on the first eccentric segment, and a second positioning portion is provided on the second eccentric segment. The first positioning portion and the second positioning portion are limitedly matched to connect the first eccentric segment and the second eccentric segment; or, the first positioning portion and the second positioning portion are connected by fasteners.

[0012] Furthermore, the first positioning portion is a recessed portion, and the second positioning portion is a protrusion, and the protrusion extends into the recessed portion and is limitedly engaged with the recessed portion.

[0013] Furthermore, there is one first positioning portion; or, there are multiple first positioning portions, and the multiple first positioning portions are arranged at intervals around the central axis of the first eccentric segment, and there are multiple second positioning portions, and the multiple first positioning portions are arranged in a one-to-one correspondence with the multiple second positioning portions.

[0014] Furthermore, the surface of the first eccentric segment facing the second eccentric segment is a first inclined surface, and the surface of the second eccentric segment facing the first eccentric segment is a second inclined surface, and the first inclined surface and the second inclined surface are arranged to fit each other.

[0015] Furthermore, the first crankshaft has a first liquid passage and a first liquid outlet connected to the first liquid passage, the second crankshaft has a second liquid passage and a second liquid outlet connected to the second liquid passage, and the first liquid passage is connected to the second liquid passage; wherein, the lubricating medium located in the first liquid passage enters the inner cavity through the first liquid outlet, and the lubricating medium located in the second liquid outlet enters the inner cavity through the second liquid outlet.

[0016] Furthermore, the first liquid passage includes a first hole segment and a second hole segment that are interconnected, the first hole segment and the second hole segment are set at a third angle, and the extension direction of the first hole segment is consistent with the extension direction of the long axis segment; the second liquid passage includes a third hole segment and a fourth hole segment that are interconnected, the third hole segment and the fourth hole segment are set at a fourth angle, the extension direction of the third hole segment is consistent with the extension direction of the short axis segment, and the second hole segment is connected to the fourth hole segment.

[0017] Furthermore, the extension direction of the first liquid-passing channel is consistent with the extension direction of the long axis segment, and the extension direction of the second liquid-passing channel is consistent with the extension direction of the short axis segment.

[0018] According to another aspect of the present invention, a fluid machine is provided, comprising the above-mentioned pump body assembly.

[0019] Applying the technical solution of the present invention, the pump body assembly includes a first crankshaft and a second crankshaft, and the first eccentric section of the first crankshaft is connected to the second eccentric section of the second crankshaft to form an eccentric portion. The roller is sleeved outside the eccentric portion and moves under the drive of the eccentric portion to realize the suction, compression and exhaust actions of the pump body assembly. In this way, during the installation of the roller and the first crankshaft and the second crankshaft, the first eccentric section and the second eccentric section are respectively extended into the roller, and the first eccentric section and the second eccentric section after docking form an eccentric portion to realize the assembly of the roller and the first crankshaft and the second crankshaft, without passing the roller through the long shaft section and the short shaft section. Among them, the above-mentioned installation method of the roller and the first crankshaft and the second crankshaft breaks through the traditional installation size requirements (the radius R of the eccentric portion e The eccentricity e of the eccentric part, the radius R1 of the long axis section of the crankshaft and the radius R2 of the short axis section of the crankshaft need to satisfy R e -e>min(R1,R2)), thus solving the problem that the rolling rotor compressor in the prior art cannot have both small size and large displacement. e The eccentricity e can be increased while keeping the value unchanged, thereby increasing the displacement of the compressor and improving the working efficiency of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 A cross-sectional view of a first embodiment of a pump assembly according to the present invention is shown;

[0022] Figure 2 Shown Figure 1 An exploded view of the first crankshaft and the second crankshaft of the pump assembly;

[0023] Figure 3 Shown Figure 2 A partial front view of the first crankshaft and the second crankshaft;

[0024] Figure 4 Shown Figure 2 A partial cross-sectional view of the first crankshaft and the second crankshaft;

[0025] Figure 5 A cross-sectional view of a second embodiment of a pump assembly according to the present invention is shown;

[0026] Figure 6 It shows a partial front view of the first crankshaft and the second crankshaft of the third embodiment of the pump assembly according to the present invention;

[0027] Figure 7 A partial cross-sectional view showing a first crankshaft, a second crankshaft, and fasteners according to a fourth embodiment of a pump assembly of the present invention; and

[0028] Figure 8 A partial front view of the first crankshaft and the second crankshaft of the fifth embodiment of the pump body assembly according to the present invention is shown.

[0029] The above drawings include the following reference numerals:

[0030] 10. Cylinder; 20. First crankshaft; 21. Major shaft section; 22. First eccentric section; 221. First positioning portion; 222. First inclined surface; 23. First liquid passage; 231. First hole section; 232. Second hole section; 24. First liquid outlet; 30. Second crankshaft; 31. Major shaft section; 32. Second eccentric section; 321. Second positioning portion; 322. Second inclined surface; 33. Second liquid passage; 331. Third hole section; 332. Fourth hole section; 34. Second liquid outlet; 40. Roller; 51. First transition shaft section; 52. Second transition shaft section; 60. Upper flange; 61. First through-hole section; 62. Second through-hole section; 70. Lower flange; 71. Third through-hole section; 72. Fourth through-hole section; 80. Sliding vane; 90. Fastener. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0033] In the present invention, unless otherwise specified, directional words such as "up" and "down" are generally used with respect to the directions shown in the drawings, or with respect to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" are generally used with respect to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0034] In order to solve the problem in the prior art that rolling rotor compressors cannot have both small size and large displacement, the present application provides a pump body assembly and a fluid machinery having the same.

[0035] like Figures 1 to 4 As shown, the pump body assembly includes a cylinder 10, a first crankshaft 20, a second crankshaft 30 and a roller 40. The cylinder 10 has an air inlet, an inner cavity and a vane groove, and the air inlet and the vane groove are both connected to the inner cavity. The first crankshaft 20 includes a long shaft section 21 and a first eccentric section 22 connected to the long shaft section 21. The second crankshaft 30 includes a short shaft section 31 and a second eccentric section 32 connected to the short shaft section 31. The roller 40 is located in the inner cavity, and the roller 40 is sleeved outside the first eccentric section 22 and the second eccentric section 32. Among them, the eccentricity of the first eccentric section 22 and the eccentricity of the second eccentric section 32 are both e, and the radius of the first eccentric section 22 and the radius of the second eccentric section 32 are equal.

[0036] Applying the technical solution of the present invention, the pump body assembly includes a first crankshaft 20 and a second crankshaft 30. The first eccentric section 22 of the first crankshaft 20 is connected to the second eccentric section 32 of the second crankshaft 30 to form an eccentric portion. The roller 40 is sleeved outside the eccentric portion and moves under the drive of the eccentric portion to realize the suction, compression and exhaust actions of the pump body assembly. In this way, during the installation of the roller 40 and the first crankshaft 20 and the second crankshaft 30, the first eccentric section 22 and the second eccentric section 32 are respectively extended into the roller 40. After docking, the first eccentric section 22 and the second eccentric section 32 form an eccentric portion to realize the assembly of the roller 40 and the first crankshaft 20 and the second crankshaft 30 without passing the roller 40 through the long shaft section 21 and the short shaft section 31. Among them, the above-mentioned installation method of the roller 40 and the first crankshaft 20 and the second crankshaft 30 breaks through the traditional installation size requirements (the radius R of the eccentric portion). e The eccentricity e of the eccentric part, the radius R1 of the long axis section of the crankshaft and the radius R2 of the short axis section of the crankshaft need to satisfy R e -e>min(R1,R2)), thus solving the problem that the rolling rotor compressor in the prior art cannot have both small size and large displacement. e The eccentricity e can be increased while keeping the value unchanged, thereby increasing the displacement of the compressor and improving the working efficiency of the compressor.

[0037] In this embodiment, the displacement calculation formula of the pump assembly is as follows: V = π [R c 2 -(R c -e) 2 ]H c , where R c 、H c are the inner radius and height of the cylinder 10 respectively. Increasing the eccentricity e can achieve a larger displacement design under the same pump body assembly, thereby contributing to the miniaturization of the compressor. Since the eccentric portion is formed by the docking of the first eccentric section 22 and the second eccentric section 32, even if R e -e≤min(R1, R2), the roller 40 can also be installed on the first crankshaft 20 and the second crankshaft 30, thereby making the pump body assembly break through the traditional installation size requirements and reducing the radius R of the first eccentric section 22 and the second eccentric section 32 while keeping the eccentricity e unchanged. e , in order to realize the miniaturization design of the pump body component and reduce the processing cost. At the same time, the above arrangement can also reduce the relative sliding speed of the upper and lower flanges of the pump body component, thereby reducing friction power consumption.

[0038] It should be noted that the eccentricity e of the first eccentric segment 22 refers to the shortest distance between the central axis of the first eccentric segment 22 and the central axis of the major axis segment 21 .

[0039] It should be noted that the eccentricity e of the second eccentric segment 32 refers to the shortest distance between the central axis of the second eccentric segment 32 and the central axis of the short axis segment 31 .

[0040] In this embodiment, R e -e<min(R1, R2), without increasing the radius R of the first eccentric section 22 and the second eccentric section 32 e Under the premise of , the above arrangement increases the eccentricity e of the first crankshaft 20 and the second crankshaft 30, thereby realizing a large displacement design of the pump assembly. At the same time, the above arrangement makes the structure of the first crankshaft 20 and the second crankshaft 30 simpler, easier to process and realize, and reduces the processing cost of the pump assembly.

[0041] Optionally, the height H1 of the first eccentric segment 22 and the height H2 of the second eccentric segment 32 satisfy the following relationship: 0.5 ≤ H1 / (H1 + H2) ≤ 0.8. This arrangement ensures that the first eccentric segment 22 has sufficient length for power transmission and also properly distributes the force acting on the roller 40, thereby improving the operational stability of the pump assembly.

[0042] Specifically, the first crankshaft 20 is connected to the driving device, which drives the first crankshaft 20 to rotate, thereby driving the roller 40 to move, and the roller 40 then drives the second crankshaft 30 to rotate, thereby realizing the suction, compression and exhaust actions of the pump body assembly.

[0043] In this embodiment, H1 / (H1+H2)=0.5, so that the processing of the first crankshaft 20 and the second crankshaft 30 is easier and simpler, and the processing difficulty and processing cost are reduced.

[0044] It should be noted that the value of H1 / (H1+H2) is not limited to this and can be adjusted according to working conditions and usage requirements. Optionally, H1 / (H1+H2)=0.55, or H1 / (H1+H2)=0.6, or H1 / (H1+H2)=0.65, or H1 / (H1+H2)=0.7, or H1 / (H1+H2)=0.75, or H1 / (H1+H2)=0.8.

[0045] It should be noted that the height direction of the first eccentric segment 22 is consistent with the height direction of the pump body assembly, and the height direction of the second eccentric segment 32 is consistent with the height direction of the pump body assembly.

[0046] In this embodiment, the first crankshaft 20 and the second crankshaft 30 are both integrally formed structures, and the first eccentric segment 22 and the second eccentric segment 32 are both clearance-fitted with the roller 40 .

[0047] like Figures 1 to 4 As shown, the pump body assembly also includes a first transition shaft section 51 and an upper flange 60. The long shaft section 21 is connected to the first eccentric section 22 through the first transition shaft section 51, and the first transition shaft section 51 and the long shaft section 21 are arranged at a first angle. The upper flange 60 is arranged above the cylinder 10, and the upper flange 60 has a first through-hole section 61 and a second through-hole section 62 that are interconnected. The long shaft section 21 is inserted into the first through-hole section 61, and the first transition shaft section 51 is inserted into the second through-hole section 62. In this way, without increasing the radius R of the first eccentric section 22, e Under the premise of , the above arrangement, on the one hand, increases the value of the eccentricity e, thereby achieving a large displacement design for the pump assembly; on the other hand, it simplifies the structure of the first crankshaft 20, making it easier to manufacture and implement, thereby reducing the processing cost of the first crankshaft 20. At the same time, the above arrangement enables the upper flange 60 to limit the radial position of the long shaft segment 21, ensuring that the long shaft segment 21 rotates about its central axis, and also avoids structural interference between the first transition shaft segment 51 and the upper flange 60 that would affect the normal rotation of the first crankshaft 20, thereby improving the operational reliability of the pump assembly.

[0048] In this embodiment, the aperture of the second via hole section 62 is larger than the aperture of the first via hole section 61 , and the first via hole section 61 and the second via hole section 62 are coaxially arranged.

[0049] like Figures 1 to 4 As shown, the pump body assembly also includes a second transition shaft section 52 and a lower flange 70. The short shaft section 31 is connected to the second eccentric section 32 through the second transition shaft section 52, and the second transition shaft section 52 and the short shaft section 31 are arranged at a second angle. The lower flange 70 is arranged below the cylinder 10, and the lower flange 70 has a third through-hole section 71 and a fourth through-hole section 72 that are connected to each other. The short shaft section 31 is inserted into the third through-hole section 71, and the second transition shaft section 52 is inserted into the fourth through-hole section 72. In this way, without increasing the radius R of the second eccentric section 32 e Under the premise of , the above arrangement, on the one hand, increases the value of the eccentricity e, thereby achieving a large displacement design for the pump assembly; on the other hand, it simplifies the structure of the second crankshaft 30, making it easier to manufacture and implement, thereby reducing the processing cost of the second crankshaft 30. At the same time, the above arrangement enables the lower flange 70 to limit the radial position of the short shaft segment 31, ensuring that the short shaft segment 31 rotates about its central axis, and also prevents structural interference between the second transition shaft segment 52 and the lower flange 70 that could affect the normal rotation of the second crankshaft 30, thereby improving the operational reliability of the pump assembly.

[0050] In this embodiment, the aperture of the fourth via hole segment 72 is larger than the aperture of the third via hole segment 71 , and the third via hole segment 71 and the fourth via hole segment 72 are coaxially arranged.

[0051] In this embodiment, the first eccentric segment 22 and the second eccentric segment 32 are coaxially arranged. Specifically, the orthographic projection of the first eccentric segment 22 on the second eccentric segment 32 is located on the second eccentric segment 32. This ensures that the first eccentric segment 22 and the second eccentric segment 32 can be installed in the roller 40. It also enables the first eccentric segment 22 to drive the second crankshaft 30 to rotate via the roller 40, thereby reducing friction loss in the pump assembly and improving the operating efficiency of the pump assembly.

[0052] like Figure 4 As shown, the first crankshaft 20 has a first liquid passage 23 and a first liquid outlet 24 connected to the first liquid passage 23. The second crankshaft 30 has a second liquid passage 33 and a second liquid outlet 34 connected to the second liquid passage 33. The first liquid passage 23 is connected to the second liquid passage 33. The lubricating medium in the first liquid passage 23 enters the inner cavity through the first liquid outlet 24, and the lubricating medium in the second liquid outlet 34 enters the inner cavity through the second liquid outlet 34. Thus, during operation of the pump assembly, the lubricating medium can enter the second liquid passage 33 through the lower end of the second liquid passage 33 and can be discharged through the first liquid outlet 24 and the second liquid outlet 34 to lubricate the roller 40 and the cylinder 10, thereby reducing the frictional energy consumption of the pump assembly and improving its operating efficiency.

[0053] Specifically, the first liquid outlet portion 24 is provided on the first eccentric section 22 and communicates with the liquid inlet of the first liquid passage 23. The liquid outlet of the second liquid passage 33 communicates with the liquid inlet of the first liquid passage 23. The second liquid outlet portion 34 is provided on the second eccentric section 32 and communicates with the liquid outlet of the second liquid passage 33. This arrangement ensures that the lubricating medium entering the first liquid passage 23 and the second liquid passage 33 can flow smoothly, thereby improving the reliability of the lubricating medium in lubricating the pump assembly.

[0054] like Figure 4 As shown, the first liquid passage 23 includes a first hole segment 231 and a second hole segment 232, which are interconnected. The first hole segment 231 and the second hole segment 232 are arranged at a third angle, and the first hole segment 231 extends in the same direction as the major axis segment 21. The second liquid passage 33 includes a third hole segment 331 and a fourth hole segment 332, which are interconnected. The third hole segment 331 and the fourth hole segment 332 are arranged at a fourth angle, and the third hole segment 331 extends in the same direction as the minor axis segment 31. The second hole segment 232 and the fourth hole segment 332 are interconnected. This arrangement of the second hole segment 232 and the fourth hole segment 332 reduces the structural thickness between the inner surface of the first liquid passage 23 and the outer surface of the first eccentric segment 22, and between the inner surface of the second liquid passage 33 and the outer surface of the second eccentric segment 32, thereby improving the structural strength of the first and second crankshafts 20 and 30 and extending the service life of the pump assembly.

[0055] In this embodiment, the second hole segment 232 extends toward the first eccentric segment 22 , and the fourth hole segment 332 extends toward the second eccentric segment 32 .

[0056] Specifically, Table 1 shows the key dimensions and friction performance comparison of the pump assembly in the prior art and the pump assembly in this embodiment, where the friction power consumption is the simulation result of the cooling capacity of the Class B compressor in the national standard GB 15765 under the operating condition of 60Hz. Under the same cylinder size and crankshaft major and minor axis diameters, the displacement of the pump assembly in the prior art is 10.2mL, which has reached the limit, while the displacement of the pump assembly in this embodiment can reach 13.0mL, an increase of 27%. At the same time, the eccentric radius R e (The radius R of the first eccentric section 22 e , R of the second eccentric segment 32 e ) can be reduced from 10.3 mm to 87.8 mm, thereby reducing the friction power consumption of the eccentric part from 14.5 W to 11.2 W, a reduction of 22%. Therefore, the pump body assembly in this embodiment has significant significance for miniaturization, efficiency and cost reduction of the compressor.

[0057] Table 1 Comparison of key dimensions and friction performance of the pump body assembly in the prior art and the pump body assembly in this embodiment

[0058]

[0059] The present application also provides a fluid machine (not shown) comprising the above-mentioned pump body assembly.

[0060] Optionally, the fluid machine is a compressor.

[0061] like Figure 1 As shown, the pump body assembly further includes a slide 80. The cylinder 10 has a slide groove, the slide 80 is slidably disposed in the slide groove, and one end of the slide 80 facing the roller 40 is fitted with the roller 40.

[0062] Example 2

[0063] The difference between the pump body assembly in the second embodiment and the first embodiment is that the structure of the pump body assembly is different.

[0064] Optionally, a first positioning portion 221 is provided on the first eccentric segment 22, and a second positioning portion 321 is provided on the second eccentric segment 32. The first positioning portion 221 and the second positioning portion 321 are limitedly engaged with each other to connect the first eccentric segment 22 and the second eccentric segment 32. Alternatively, the first positioning portion 221 and the second positioning portion 321 are connected by a fastener 90. In this way, the first eccentric segment 22 is connected to the second eccentric segment 32, and the power of the second eccentric segment 32 comes from the first eccentric segment 22 and the roller 40. The lower flange 70 is used to support the second crankshaft 30, thereby improving the structural stability of the pump assembly and ensuring smooth operation of the pump assembly.

[0065] like Figure 5 As shown, the first eccentric segment 22 is provided with a first positioning portion 221, and the second eccentric segment 32 is provided with a second positioning portion 321. The first positioning portion 221 and the second positioning portion 321 are limitedly engaged to connect the first eccentric segment 22 and the second eccentric segment 32. This arrangement makes assembly and disassembly of the first eccentric segment 22 and the second eccentric segment 32 easier and simpler, reducing the difficulty of assembly and disassembly. The first positioning portion 221 and the second positioning portion 321 are clearance-engaged.

[0066] In this embodiment, the first positioning portion 221 is a recessed portion, and the second positioning portion 321 is a protrusion. The protrusion extends into the recessed portion and engages with the recessed portion. This arrangement simplifies the structure of the first positioning portion 221 and the second positioning portion 321, making them easier to manufacture and implement, thereby reducing the processing cost and difficulty of the pump assembly.

[0067] Optionally, there is one first positioning portion 221; or, there are multiple first positioning portions 221, with the multiple first positioning portions 221 spaced apart around the central axis of the first eccentric segment 22, and multiple second positioning portions 321, with the multiple first positioning portions 221 corresponding to the multiple second positioning portions 321. This arrangement allows for greater flexibility in the placement of the first positioning portions 221 and the second positioning portions 321, meeting different operating conditions and requirements, and reducing the complexity of the process for the operator.

[0068] Example 3

[0069] The difference between the pump body assembly in the third embodiment and the second embodiment is that the structures of the first positioning portion 221 and the second positioning portion 321 are different.

[0070] like Figure 6 As shown, the first positioning portion 221 is a protrusion, and the second positioning portion 321 is a recess. The protrusion extends into the recess and engages with the recess. In this way, the above arrangement makes the structure of the first positioning portion 221 and the second positioning portion 321 simpler, easier to process and implement, and reduces the processing cost and difficulty of the pump body assembly.

[0071] Example 4

[0072] The difference between the pump body assembly in the fourth embodiment and the second embodiment is that the connection method of the first positioning portion 221 and the second positioning portion 321 is different.

[0073] like Figure 7 As shown, the first positioning portion 221 and the second positioning portion 321 are connected by a fastener 90. Thus, the above arrangement makes the assembly and disassembly of the first eccentric segment 22 and the second eccentric segment 32 easier and simpler, reducing the difficulty of assembly and disassembly. The first positioning portion 221 and the second positioning portion 321 are clearance-fitted.

[0074] In this embodiment, the first positioning portion 221 and the second positioning portion 321 are both pin holes, and the fastener 90 is a pin.

[0075] like Figure 7 As shown, the first liquid passage 23 extends in the same direction as the major axis segment 21, and the second liquid passage 33 extends in the same direction as the minor axis segment 31. This arrangement prevents structural interference between the first liquid passage 23 and the first positioning portion 221, and between the second liquid passage 33 and the second positioning portion 321, which could affect the normal flow of the lubricating medium.

[0076] Example 5

[0077] The difference between the pump body assembly in the fifth embodiment and that in the first embodiment is that the structure of the pump body assembly is different.

[0078] like Figure 8As shown, the surface of the first eccentric segment 22 facing the second eccentric segment 32 is a first inclined surface 222, and the surface of the second eccentric segment 32 facing the first eccentric segment 22 is a second inclined surface 322. The first inclined surface 222 and the second inclined surface 322 are arranged in contact with each other. Thus, when the first eccentric segment 22 and the second eccentric segment 32 are docked together, the first inclined surface 222 and the second inclined surface 322 are arranged in contact with each other, so that the first inclined surface 222 drives the second inclined surface 322 to move, thereby causing the second crankshaft 30 to rotate relative to the lower flange 70.

[0079] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0080] The pump body assembly includes a first crankshaft and a second crankshaft. The first eccentric section of the first crankshaft is connected to the second eccentric section of the second crankshaft to form an eccentric portion. The roller is sleeved outside the eccentric portion and moves under the drive of the eccentric portion to realize the suction, compression and exhaust actions of the pump body assembly. In this way, during the installation of the roller and the first crankshaft and the second crankshaft, the first eccentric section and the second eccentric section are respectively extended into the roller. After docking, the first eccentric section and the second eccentric section form an eccentric portion to realize the assembly of the roller and the first crankshaft and the second crankshaft without passing the roller through the long shaft section and the short shaft section. Among them, the above-mentioned installation method of the roller and the first crankshaft and the second crankshaft breaks through the traditional installation size requirements (the radius R of the eccentric section e The eccentricity e of the eccentric part, the radius R1 of the long axis section of the crankshaft and the radius R2 of the short axis section of the crankshaft need to satisfy R e -e>min(R1,R2)), thus solving the problem that the rolling rotor compressor in the prior art cannot have both small size and large displacement. e The eccentricity e can be increased while keeping the value unchanged, thereby increasing the displacement of the compressor and improving the working efficiency of the compressor.

[0081] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0082] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0083] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0084] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A pump assembly, characterized in that: include: The cylinder (10) comprises an air inlet, an inner cavity and a vane slot, wherein the air inlet and the vane slot are both in communication with the inner cavity; A first crankshaft (20) comprising a long shaft section (21) and a first eccentric section (22) connected to the long shaft section (21); A second crankshaft (30) comprising a short shaft section (31) and a second eccentric section (32) connected to the short shaft section (31); A roller (40) is located in the inner cavity, and the roller (40) is sleeved outside the first eccentric section (22) and the second eccentric section (32); The eccentricity of the first eccentric section (22) and the eccentricity of the second eccentric section (32) are both e, and the radius of the first eccentric section (22) and the radius of the second eccentric section (32) are equal; The height H1 of the first eccentric section (22) and the height H2 of the second eccentric section (32) satisfy the following relationship: 0.5≤H1 / (H1+H2)≤0.

8.

2. The pump assembly according to claim 1, characterized in that The pump assembly further comprises: a first transition shaft segment (51), wherein the long shaft segment (21) is connected to the first eccentric segment (22) via the first transition shaft segment (51), and the first transition shaft segment (51) and the long shaft segment (21) are arranged at a first angle; An upper flange (60) is arranged above the cylinder (10), and the upper flange (60) has a first through-hole section (61) and a second through-hole section (62) that are connected to each other, the long axis section (21) is passed through the first through-hole section (61), and the first transition axis section (51) is passed through the second through-hole section (62).

3. The pump assembly according to claim 1, characterized in that The pump assembly further comprises: a second transition shaft segment (52), the short shaft segment (31) being connected to the second eccentric segment (32) via the second transition shaft segment (52), the second transition shaft segment (52) and the short shaft segment (31) being arranged at a second angle; A lower flange (70) is arranged below the cylinder (10), and the lower flange (70) has a third through-hole section (71) and a fourth through-hole section (72) that are connected to each other, the short shaft section (31) is passed through the third through-hole section (71), and the second transition shaft section (52) is passed through the fourth through-hole section (72).

4. The pump assembly according to claim 1, characterized in that The first eccentric segment (22) and the second eccentric segment (32) are coaxially arranged.

5. The pump assembly according to claim 1, characterized in that The first eccentric segment (22) is provided with a first positioning portion (221), and the second eccentric segment (32) is provided with a second positioning portion (321), and the first positioning portion (221) and the second positioning portion (321) are limitedly matched to connect the first eccentric segment (22) and the second eccentric segment (32); alternatively, the first positioning portion (221) and the second positioning portion (321) are connected via a fastener (90).

6. The pump assembly according to claim 5, characterized in that The first positioning portion (221) is a recessed portion, and the second positioning portion (321) is a protrusion, the protrusion extending into the recessed portion and engaging with the recessed portion in a limiting manner.

7. The pump assembly according to claim 5, characterized in that There is one first positioning portion (221); or there are multiple first positioning portions (221), and the multiple first positioning portions (221) are arranged at intervals around the central axis of the first eccentric section (22); there are multiple second positioning portions (321), and the multiple first positioning portions (221) and the multiple second positioning portions (321) are arranged in a one-to-one correspondence.

8. The pump assembly according to claim 1, characterized in that The surface of the first eccentric segment (22) facing the second eccentric segment (32) is a first inclined surface (222), and the surface of the second eccentric segment (32) facing the first eccentric segment (22) is a second inclined surface (322), and the first inclined surface (222) and the second inclined surface (322) are arranged to fit each other.

9. The pump assembly according to claim 1, wherein: The first crankshaft (20) has a first liquid passage (23) and a first liquid outlet (24) communicating with the first liquid passage (23); the second crankshaft (30) has a second liquid passage (33) and a second liquid outlet (34) communicating with the second liquid passage (33); the first liquid passage (23) is communicated with the second liquid passage (33); wherein the lubricating medium in the first liquid passage (23) enters the inner cavity through the first liquid outlet (24), and the lubricating medium in the second liquid outlet (34) enters the inner cavity through the second liquid outlet (34).

10. The pump assembly according to claim 9, characterized in that The first liquid passage (23) comprises a first hole segment (231) and a second hole segment (232) which are interconnected, the first hole segment (231) and the second hole segment (232) being arranged at a third angle, and the extension direction of the first hole segment (231) is consistent with the extension direction of the long axis segment (21); the second liquid passage (33) comprises a third hole segment (331) and a fourth hole segment (332) which are interconnected, the third hole segment (331) and the fourth hole segment (332) being arranged at a fourth angle, the extension direction of the third hole segment (331) is consistent with the extension direction of the short axis segment (31), and the second hole segment (232) is connected to the fourth hole segment (332).

11. The pump assembly according to claim 9, wherein: The extension direction of the first liquid passage (23) is consistent with the extension direction of the long axis segment (21), and the extension direction of the second liquid passage (33) is consistent with the extension direction of the short axis segment (31).

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

Images