Pump components, rotor compressors and air conditioners
By optimizing the bearing area of the contact surface between the roller structure and the crankshaft and forming an appropriate oil film, the problem of low energy efficiency of the rotor compressor is solved, and the friction power loss and energy efficiency are reduced.
Patent Information
- Application Number
- CN202011401662.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-12-03
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2040-12-03
AI Technical Summary
The energy efficiency of existing rotor compressors is low and difficult to further improve, mainly due to friction problems inside the pump body assembly.
By designing the bearing area of the contact surface between the roller structure and the crankshaft, it is ensured to be in the ratio range of 29 to 36 or 56 to 70, forming a suitable oil film, reducing friction power loss and improving lubrication effect.
It effectively reduces the friction power loss of the pump body assembly and improves the energy efficiency of the rotor compressor.
Smart Images
Figure CN112460021B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of rotary compressors, and in particular to a pump body assembly, a rotary compressor and an air conditioner. Background Art
[0002] Rotary compressors have the advantages of small size, light weight and low manufacturing cost, and are widely used in household air conditioners, commercial air conditioners and other fields.
[0003] The art has also been committed to improving the energy efficiency of rotary compressors, thereby reducing the energy consumption of air conditioners. However, the energy efficiency of current rotary compressors is still relatively low and is difficult to further improve. Summary of the invention
[0004] The main purpose of the present invention is to provide a pump body assembly, a rotor compressor and an air conditioner to solve the problem of low energy efficiency of the rotor compressor in the prior art.
[0005] 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, a roller structure installed in a compression chamber of the cylinder, and a crankshaft, wherein the roller structure is sleeved on the crankshaft so as to drive the roller structure to roll along the inner wall of the compression chamber through the crankshaft; when the roller structure is a roller, the ratio V / S5 of the displacement V of the pump body assembly to the bearing area S5 of the roller is in the range of 29 to 36; when the roller structure is composed of two rollers, the two rollers are respectively a first roller and a second roller, and the first roller is located on the side of the second roller close to the power input end of the crankshaft; the ratio V / S1 of the displacement V of the pump body assembly to the bearing area S1 of the first roller is in the range of 56 to 63; The ratio V / S2 of the displacement V to the bearing area S2 of the second roller is in the range of 60 to 70; wherein, the displacement V of the pump body assembly is the exhaust volume of the pump body assembly in one working cycle; the bearing area S5 of the roller is the area of the orthographic projection of the contact surface between the roller and the crankshaft in the first plane, and the first plane is perpendicular to the direction of the pressure applied by the crankshaft to the roller; the bearing area S1 of the first roller is the area of the orthographic projection of the contact surface between the first roller and the crankshaft in the second plane, and the second plane is perpendicular to the direction of the pressure applied by the crankshaft to the first roller; the bearing area S2 of the second roller is the area of the orthographic projection of the contact surface between the second roller and the crankshaft in the third plane, and the third plane is perpendicular to the direction of the pressure applied by the crankshaft to the second roller.
[0006] Furthermore, when the roller structure is a roller, the contact surface between the roller and the crankshaft is a cylindrical surface, the diameter of the cylindrical surface is d5, and the height of the cylindrical surface is h5; the bearing area of the roller S5 = d5 × h5; when the roller structure is composed of two rollers, the contact surface between the first roller and the crankshaft is the first cylindrical surface, and the contact surface between the second roller and the crankshaft is the second cylindrical surface; the diameter of the first cylindrical surface is d1, and the height of the first cylindrical surface is h1, the diameter of the second cylindrical surface is d2, and the height of the second cylindrical surface is h2; the bearing area of the first roller S1 = d1 × h1, and the bearing area of the second roller S2 = d2 × h2.
[0007] Furthermore, when the roller structure consists of two rollers, the ratio V / S1 of the displacement V of the pump body assembly to the load-bearing area S1 of the first roller ranges from 56 to 60; the ratio V / S2 of the displacement V of the pump body assembly to the load-bearing area S2 of the second roller ranges from 60 to 66.
[0008] Furthermore, when the roller structure consists of two rollers, the ratio V / S1 of the displacement V of the pump body assembly to the load-bearing area S1 of the first roller ranges from 60 to 63; the ratio V / S2 of the displacement V of the pump body assembly to the load-bearing area S2 of the second roller ranges from 66 to 70.
[0009] Furthermore, the pump body assembly includes a main bearing and a secondary bearing, which are correspondingly arranged at opposite ends of the cylinder to support the crankshaft through the main bearing and the secondary bearing; the main bearing is located on the side of the secondary bearing close to the power input end of the crankshaft; when the roller structure is a roller, the ratio V / S6 of the displacement V of the pump body assembly to the load-bearing area S6 of the main bearing is in the range of 22 to 27; the ratio V / S7 of the displacement V of the pump body assembly to the load-bearing area S7 of the secondary bearing is in the range of 48 to 57; wherein, the load-bearing area S6 of the main bearing is the area of the orthographic projection of the contact surface between the main bearing and the crankshaft in the fourth plane, and the fourth plane is perpendicular to the direction of the pressure applied by the main bearing to the crankshaft; the load-bearing area S7 of the secondary bearing is the area of the orthographic projection of the contact surface between the secondary bearing and the crankshaft in the fifth plane, and the fifth plane is perpendicular to the direction of the pressure applied by the secondary bearing to the crankshaft.
[0010] Furthermore, the pump body assembly includes a main bearing and a secondary bearing, which are correspondingly arranged at opposite ends of the cylinder to support the crankshaft through the main bearing and the secondary bearing; the main bearing is located on the side of the secondary bearing close to the power input end of the crankshaft; when the roller structure is composed of a first roller and a second roller, the ratio V / S3 of the displacement V of the pump body assembly to the load-bearing area S3 of the main bearing is in the range of 37 to 44; the ratio V / S4 of the displacement V of the pump body assembly to the load-bearing area S4 of the secondary bearing is in the range of 76 to 88; wherein, the load-bearing area S3 of the main bearing is the area of the orthographic projection of the contact surface between the main bearing and the crankshaft in the fourth plane, and the fourth plane is perpendicular to the direction of the pressure applied by the main bearing to the crankshaft; the load-bearing area S4 of the secondary bearing is the area of the orthographic projection of the contact surface between the secondary bearing and the crankshaft in the fifth plane, and the fifth plane is perpendicular to the direction of the pressure applied by the secondary bearing to the crankshaft.
[0011] Furthermore, the ratio V / S3 of the displacement V of the pump body assembly to the load-bearing area S3 of the main bearing ranges from 37 to 41; the ratio V / S4 of the displacement V of the pump body assembly to the load-bearing area S4 of the secondary bearing ranges from 76 to 80.
[0012] Furthermore, the ratio V / S3 of the displacement V of the pump body assembly to the load-bearing area S3 of the main bearing ranges from 41 to 44; the ratio V / S4 of the displacement V of the pump body assembly to the load-bearing area S4 of the secondary bearing ranges from 80 to 88.
[0013] Furthermore, the contact surface between the main bearing and the crankshaft is the third cylindrical surface, and the contact surface between the secondary bearing and the crankshaft is the fourth cylindrical surface; the diameter of the third cylindrical surface is d3, the height of the third cylindrical surface is h3, the diameter of the fourth cylindrical surface is d4, and the height of the fourth cylindrical surface is h4; the load-bearing area of the main bearing S3 = d3 × h3, and the load-bearing area of the secondary bearing S4 = d4 × h4.
[0014] According to a second aspect of the present invention, a rotary compressor is provided, which includes: a pump body assembly, which is the above-mentioned pump body assembly; a motor assembly, which is used to drive the crankshaft of the pump body assembly to rotate; a liquid separator, which is used to separate gaseous refrigerant from liquid refrigerant; the liquid separator is connected to the air intake port of the cylinder of the pump body assembly to supply gaseous refrigerant to the cylinder.
[0015] According to a third aspect of the present invention, an air conditioner is provided, comprising the above-mentioned rotary compressor.
[0016] The pump body assembly using the technical solution of the present invention comprises a cylinder, a roller structure installed in the compression chamber of the cylinder, and a crankshaft, wherein the roller structure is sleeved on the crankshaft so as to drive the roller structure to roll along the inner wall of the compression chamber through the crankshaft; when the roller structure is a roller, the ratio V / S5 of the displacement V of the pump body assembly to the bearing area S5 of the roller is in the range of 29 to 36; when the roller structure is composed of two rollers, the two rollers are respectively the first roller and the second roller, and the first roller is located on the side of the second roller close to the power input end of the crankshaft; the ratio V / S1 of the displacement V of the pump body assembly to the bearing area S1 of the first roller is in the range of 56 to 63; the displacement V of the pump body assembly and the bearing area S1 of the second roller are in the range of 10 to 15; the displacement V of the pump body assembly and the bearing area S2 of the second roller are in the range of 21 to 25; the displacement V of the pump body assembly and the bearing area S3 of the second roller are in the range of 10 to 25. The ratio V / S2 of the bearing area S2 of the cylinder ranges from 60 to 70; wherein, the displacement V of the pump body assembly is the exhaust volume of the pump body assembly in one working cycle; the bearing area S5 of the roller is the area of the orthographic projection of the contact surface between the roller and the crankshaft in the first plane, and the first plane is perpendicular to the direction of the pressure applied by the crankshaft to the roller; the bearing area S1 of the first roller is the area of the orthographic projection of the contact surface between the first roller and the crankshaft in the second plane, and the second plane is perpendicular to the direction of the pressure applied by the crankshaft to the first roller; the bearing area S2 of the second roller is the area of the orthographic projection of the contact surface between the second roller and the crankshaft in the third plane, and the third plane is perpendicular to the direction of the pressure applied by the crankshaft to the second roller. By designing the bearing area (effective force bearing area) of the contact surface between the roller structure and the crankshaft, for a pump body assembly with a single roller structure, the ratio V / S5 of the displacement V of the pump body assembly to the bearing area S5 of the roller is in the range of 29 to 36; for a pump body assembly with a double roller structure, the ratio V / S1 of the displacement V of the pump body assembly to the bearing area S1 of the first roller is in the range of 56 to 63; the ratio V / S2 of the displacement V of the pump body assembly to the bearing area S2 of the second roller is in the range of 60 to 70. Through the above settings, the contact surface area of the crankshaft and the roller structure is in a better range, which can form an oil film of appropriate thickness between the two, improve the lubrication effect, reduce the friction power loss of the pump body assembly, and improve the energy efficiency of the rotor compressor. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:
[0018] Figure 1 A schematic cross-sectional view of a first embodiment of a pump assembly according to the present invention is shown;
[0019] Figure 2 A schematic cross-sectional view of a second embodiment of a pump assembly according to the present invention is shown;
[0020] Figure 3 A schematic diagram showing the matching relationship between the cylinder, the roller structure and the crankshaft of an embodiment of a pump assembly according to the present invention is shown;
[0021] Figure 4 A schematic structural diagram of a crankshaft according to an embodiment of a pump assembly of the present invention is shown;
[0022] Figure 5 A schematic structural diagram of an embodiment of a rotary compressor according to the present invention is shown.
[0023] The above drawings include the following reference numerals:
[0024] 1. Cylinder; 2. Roller structure; 21. First roller; 22. Second roller; 3. Crankshaft; 31. Shaft body; 32. First eccentric part; 33. Second eccentric part; 4. Main bearing; 5. Auxiliary bearing; 6. Sliding vane; 100. Pump body assembly; 200. Motor assembly; 300. Dispenser. DETAILED DESCRIPTION
[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0026] The applicant has found that one of the important reasons for the low energy efficiency of the existing rotary compressor is the friction inside the pump assembly of the rotary compressor. The applicant has found that most of the friction inside the pump assembly of the rotary compressor is concentrated at the contact surface between the crankshaft 3 and the roller structure 2 (at the eccentric bearing). Reducing the friction at this position will help reduce the friction power loss inside the pump assembly and improve the energy efficiency of the rotary compressor.
[0027] Please refer to Figures 1 to 4The present invention provides a pump body assembly, comprising a cylinder 1, a roller structure 2 installed in a compression chamber of the cylinder 1, and a crankshaft 3, wherein the roller structure 2 is sleeved on the crankshaft 3 so as to drive the roller structure 2 to roll along the inner wall of the compression chamber through the crankshaft 3; when the roller structure 2 is a roller, the ratio V / S5 of the displacement V of the pump body assembly to the bearing area S5 of the roller is in a range of 29 to 36; when the roller structure 2 is composed of two rollers, the two rollers are respectively a first roller 21 and a second roller 22, and the first roller 21 is located on a side of the second roller 22 close to the power input end of the crankshaft 3; the ratio V / S1 of the displacement V of the pump body assembly to the bearing area S1 of the first roller 21 is in a range of 56 to 63; the displacement V of the pump body assembly to the bearing area S1 of the second roller 21 is in a range of 56 to 63. The ratio V / S2 of the bearing area S2 of the cylinder 22 ranges from 60 to 70; wherein, the displacement V of the pump body assembly is the exhaust volume of the pump body assembly in one working cycle; the bearing area S5 of the roller is the area of the orthographic projection of the contact surface between the roller and the crankshaft 3 in the first plane, and the first plane is perpendicular to the direction of the pressure applied by the crankshaft 3 to the roller; the bearing area S1 of the first roller 21 is the area of the orthographic projection of the contact surface between the first roller 21 and the crankshaft 3 in the second plane, and the second plane is perpendicular to the direction of the pressure applied by the crankshaft 3 to the first roller 21; the bearing area S2 of the second roller 22 is the area of the orthographic projection of the contact surface between the second roller 22 and the crankshaft 3 in the third plane, and the third plane is perpendicular to the direction of the pressure applied by the crankshaft 3 to the second roller 22.
[0028] The pump body assembly of the present invention comprises a cylinder 1, a roller structure 2 installed in a compression chamber of the cylinder 1, and a crankshaft 3, wherein the roller structure 2 is sleeved on the crankshaft 3 so as to drive the roller structure 2 to roll along the inner wall of the compression chamber through the crankshaft 3; when the roller structure 2 is a roller, the ratio V / S5 of the displacement V of the pump body assembly to the bearing area S5 of the roller is in a range of 29 to 36; when the roller structure 2 is composed of two rollers, the two rollers are respectively a first roller 21 and a second roller 22, and the first roller 21 is located on a side of the second roller 22 close to the power input end of the crankshaft 3; the ratio V / S1 of the displacement V of the pump body assembly to the bearing area S1 of the first roller 21 is in a range of 56 to 63; the displacement V of the pump body assembly and the bearing area S1 of the second roller 22 are in a range of 10 to 15; the displacement V of the pump body assembly and the bearing area S2 of the second roller 22 are in a range of 21 to 36; the displacement V of the pump body assembly and the bearing area S3 of the second roller 22 are in a range of 10 to 15; the displacement V of the pump body assembly and the bearing area S4 of the second roller 22 are in a range of 10 to 15. The ratio V / S2 of the bearing area S2 ranges from 60 to 70; wherein the displacement V of the pump body assembly is the exhaust volume of the pump body assembly in one working cycle; the bearing area S5 of the roller is the area of the orthographic projection of the contact surface between the roller and the crankshaft 3 in the first plane, and the first plane is perpendicular to the direction of the pressure applied by the crankshaft 3 to the roller; the bearing area S1 of the first roller 21 is the area of the orthographic projection of the contact surface between the first roller 21 and the crankshaft 3 in the second plane, and the second plane is perpendicular to the direction of the pressure applied by the crankshaft 3 to the first roller 21; the bearing area S2 of the second roller 22 is the area of the orthographic projection of the contact surface between the second roller 22 and the crankshaft 3 in the third plane, and the third plane is perpendicular to the direction of the pressure applied by the crankshaft 3 to the second roller 22. By designing the bearing area (effective force bearing area) of the contact surface between the roller structure 2 and the crankshaft 3, for a pump body assembly with a single roller structure, the ratio V / S5 of the displacement V of the pump body assembly to the bearing area S5 of the roller is in the range of 29 to 36; for a pump body assembly with a double roller structure, the ratio V / S1 of the displacement V of the pump body assembly to the bearing area S1 of the first roller 21 is in the range of 56 to 63; the ratio V / S2 of the displacement V of the pump body assembly to the bearing area S2 of the second roller 22 is in the range of 60 to 70. Through the above settings, the contact surface area between the crankshaft 3 and the roller structure 2 is in a better range, which can form an oil film of appropriate thickness between the two, improve the lubrication effect, reduce the friction power loss of the pump body assembly, and improve the energy efficiency of the rotor compressor.
[0029] The existing rotary compressors are not designed for the bearing area of the contact surface between the roller structure 2 and the crankshaft 3. It is generally believed that the larger the area, the more stable the support effect of the crankshaft 3 on the roller structure 2, and the better the lubrication effect. Therefore, the above values of the existing rotary compressors are significantly smaller than the above values in this application. That is, for a single-roller pump body assembly, the ratio V / S5 of the displacement V of the pump body assembly to the bearing area S5 of the specific roller is less than 29. For a double-roller pump body assembly, the ratio V / S1 of the displacement V of the pump body assembly to the bearing area S1 of the specific first roller 21 is less than 56, and the displacement V of the pump body assembly to the bearing area S2 of the specific second roller 22 is less than 60.
[0030] However, in the present application, the applicant found that the bearing area of the contact surface between the roller structure 2 and the crankshaft 3 is not as large as possible. When the area exceeds a certain range, the thickness of the oil film between the roller structure 2 and the crankshaft 3 will increase, and the resulting adhesion will also increase, which will increase the friction loss between the roller structure 2 and the crankshaft 3. When the area is small, the thickness of the oil film will be reduced to a very small value, increasing the friction power consumption generated by the metal contact. In the present application, the bearing area is designed for the single-roller and double-roller pump body assemblies, which can ensure that the thickness of the oil film between the crankshaft 3 and the roller structure 2 is within a better range when the pump body assembly is working, thereby improving the lubrication effect, reducing the friction power loss of the pump body assembly, and improving the energy efficiency of the rotor compressor.
[0031] The displacement V of the pump assembly refers to the volume of fluid that can be delivered by the pump assembly in one cycle. Figure 3 As shown, its value is equal to the volume of the crescent-shaped space E enclosed between the inner wall surface of the cylinder 1 and the outer wall surface of the roller structure 2.
[0032] Specifically, when the roller structure 2 is two rollers, as Figure 2 As shown, the cylinder 1 adopts a split structure, that is, it includes two cylinder bodies, and the two rollers are respectively installed in the two cylinder bodies. The displacement V of the pump body assembly is equal to the sum of the displacements of the two cylinder bodies.
[0033] like Figure 3 As shown, the compression principle of the pump body assembly on the refrigerant is the same as that of the rotor compressor in the related art, that is, the pump body assembly also includes a slide 6 and an elastic member, and the slide 6 and the elastic member are both installed on the cylinder 1. The slide 6 is always in contact with the surface of the roller structure 2 under the elastic action of the elastic member. When the roller structure 2 rolls along the inner wall of the compression chamber, the refrigerant is driven to be sucked into the compression chamber of the cylinder 1 through the suction port of the cylinder 1, and the refrigerant is compressed, so that the compressed refrigerant is discharged from the exhaust port of the cylinder 1.
[0034] For the structure of crankshaft 3, Figure 4As shown, taking the case where the roller structure 2 is composed of two rollers as an example, the crankshaft 3 includes a shaft body 31, a first eccentric portion 32 and a second eccentric portion 33. The outer surfaces of the first eccentric portion 32 and the second eccentric portion 33 are both cylindrical surfaces. The axis of the first eccentric portion 32 is parallel to the axis of the shaft body 31 (not overlapping), and the axis of the second eccentric portion 33 is parallel to the axis of the shaft body 31 (not overlapping). The first roller 21 is sleeved on the first eccentric portion 32, and the second roller 22 is sleeved on the second eccentric portion 33.
[0035] Specifically, when the roller structure 2 is a roller, the contact surface between the roller and the crankshaft 3 is a cylindrical surface, the diameter of the cylindrical surface is d5, and the height of the cylindrical surface is h5; the bearing area of the roller S5 = d5 × h5; when the roller structure 2 is composed of two rollers, the contact surface between the first roller 21 and the crankshaft 3 is the first cylindrical surface, and the contact surface between the second roller 22 and the crankshaft 3 is the second cylindrical surface; the diameter of the first cylindrical surface is d1, and the height of the first cylindrical surface is h1, the diameter of the second cylindrical surface is d2, and the height of the second cylindrical surface is h2; the bearing area S1 of the first roller 21 is d1 × h1, and the bearing area S2 of the second roller 22 is d2 × h2.
[0036] Specifically, when the roller structure 2 consists of two rollers, the ratio V / S1 of the displacement V of the pump body assembly to the load-bearing area S1 of the first roller 21 ranges from 56 to 60; the ratio V / S2 of the displacement V of the pump body assembly to the load-bearing area S2 of the second roller 22 ranges from 60 to 66.
[0037] By adopting the above arrangement, it is possible to ensure that the pump body assembly has a higher displacement while ensuring the lubrication effect, thereby improving the performance of the pump body assembly.
[0038] Specifically, when the roller structure 2 consists of two rollers, the ratio V / S1 of the displacement V of the pump body assembly to the load-bearing area S1 of the first roller 21 ranges from 60 to 63; the ratio V / S2 of the displacement V of the pump body assembly to the load-bearing area S2 of the second roller 22 ranges from 66 to 70.
[0039] By adopting this arrangement, the lubrication effect between the crankshaft 3 and the roller structure 2 can be fully guaranteed, the friction power loss of the pump body assembly can be reduced to a very small range, and the energy efficiency of the rotor compressor can be improved.
[0040] Specifically, the pump body assembly includes a main bearing 4 and a secondary bearing 5, which are correspondingly arranged at opposite ends of the cylinder 1 to support the crankshaft 3 through the main bearing 4 and the secondary bearing 5; the main bearing 4 is located on the side of the secondary bearing 5 close to the power input end of the crankshaft 3; when the roller structure 2 is a roller, the ratio V / S6 of the displacement V of the pump body assembly to the bearing area S6 of the main bearing 4 is in the range of 22 to 27; the ratio V / S7 of the displacement V of the pump body assembly to the bearing area S7 of the secondary bearing 5 is in the range of 48 to 57; wherein, the bearing area S6 of the main bearing 4 is the area of the orthographic projection of the contact surface between the main bearing 4 and the crankshaft 3 in the fourth plane, and the fourth plane is perpendicular to the direction of the pressure applied by the main bearing 4 to the crankshaft 3; the bearing area S7 of the secondary bearing 5 is the area of the orthographic projection of the contact surface between the secondary bearing 5 and the crankshaft 3 in the fifth plane, and the fifth plane is perpendicular to the direction of the pressure applied by the secondary bearing 5 to the crankshaft 3.
[0041] Specifically, the pump body assembly includes a main bearing 4 and a secondary bearing 5, which are correspondingly arranged at opposite ends of the cylinder 1 to support the crankshaft 3 through the main bearing 4 and the secondary bearing 5; the main bearing 4 is located on the side of the secondary bearing 5 close to the power input end of the crankshaft 3; when the roller structure 2 is composed of a first roller 21 and a second roller 22, the ratio V / S3 of the displacement V of the pump body assembly to the bearing area S3 of the main bearing 4 is in the range of 37 to 44; the ratio V / S4 of the displacement V of the pump body assembly to the bearing area S4 of the secondary bearing 5 is in the range of 76 to 88; wherein, the bearing area S3 of the main bearing 4 is the area of the orthographic projection of the contact surface between the main bearing 4 and the crankshaft 3 in the fourth plane, and the fourth plane is perpendicular to the direction of the pressure applied by the main bearing 4 to the crankshaft 3; the bearing area S4 of the secondary bearing 5 is the area of the orthographic projection of the contact surface between the secondary bearing 5 and the crankshaft 3 in the fifth plane, and the fifth plane is perpendicular to the direction of the pressure applied by the secondary bearing 5 to the crankshaft 3.
[0042] Similarly, the internal friction loss of the pump body assembly also exists between the crankshaft 3 and the main bearing 4, and between the crankshaft 3 and the secondary bearing 5. At present, in the design process of the compressor, the usual design direction is to make the bearing area (effective force area) between the crankshaft 3 and the main bearing 4 as large as possible, believing that this can improve the support stability of the crankshaft 3 and the lubrication effect between the crankshaft 3 and the main bearing 4 and the secondary bearing 5. Therefore, the above-mentioned value ranges of the pump body assembly of the existing compressor are significantly smaller than the above-mentioned values in this application. That is, for a single-drum pump body assembly, the ratio V / S6 of the displacement V of the pump body assembly to the bearing area S6 of the main bearing 4 is significantly less than 22, and the ratio V / S7 of the displacement V of the pump body assembly to the bearing area S7 of the secondary bearing 5 is significantly less than 48. For the pump body assembly with a double-drum structure, the ratio V / S3 of the displacement V of the pump body assembly to the load-bearing area S3 of the main bearing 4 is significantly less than 37, and the ratio V / S4 of the displacement V of the pump body assembly to the load-bearing area S4 of the secondary bearing 5 is significantly less than 76.
[0043] Specifically, the ratio V / S3 of the displacement V of the pump body assembly to the load-bearing area S3 of the main bearing 4 ranges from 37 to 41; the ratio V / S4 of the displacement V of the pump body assembly to the load-bearing area S4 of the secondary bearing 5 ranges from 76 to 80.
[0044] Specifically, the ratio V / S3 of the displacement V of the pump body assembly to the load-bearing area S3 of the main bearing 4 ranges from 41 to 44; the ratio V / S4 of the displacement V of the pump body assembly to the load-bearing area S4 of the secondary bearing 5 ranges from 80 to 88.
[0045] Specifically, the contact surface between the main bearing 4 and the crankshaft 3 is the third cylindrical surface, and the contact surface between the auxiliary bearing 5 and the crankshaft 3 is the fourth cylindrical surface; the diameter of the third cylindrical surface is d3, the height of the third cylindrical surface is h3, the diameter of the fourth cylindrical surface is d4, and the height of the fourth cylindrical surface is h4; the bearing area of the main bearing 4 is S3 = d3 × h3, and the bearing area of the auxiliary bearing 5 is S4 = d4 × h4.
[0046] It should be noted that the displacement V of the above-mentioned pump assembly corresponds to the unit of each bearing area, that is, if the unit of displacement V is cm 3 , then the unit of each bearing area is cm 2 ; If the unit of displacement V is mm 3 , then the unit of each bearing area is mm 2 .
[0047] like Figure 5As shown, a rotary compressor is provided, which includes: a pump body assembly 100, which is the above-mentioned pump body assembly; a motor assembly 200, which is used to drive the crankshaft 3 of the pump body assembly 100 to rotate; a liquid separator 300, which is used to separate the gaseous refrigerant from the liquid refrigerant; the liquid separator 300 is connected to the air intake port of the cylinder 1 of the pump body assembly 100 to supply the gaseous refrigerant to the cylinder 1.
[0048] In addition, the present invention also provides an air conditioner, specifically the air conditioner includes the above-mentioned rotor compressor.
[0049] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:
[0050] The pump body assembly of the present invention comprises a cylinder 1, a roller structure 2 installed in a compression chamber of the cylinder 1, and a crankshaft 3, wherein the roller structure 2 is sleeved on the crankshaft 3 so as to drive the roller structure 2 to roll along the inner wall of the compression chamber through the crankshaft 3; when the roller structure 2 is a roller, the ratio V / S5 of the displacement V of the pump body assembly to the bearing area S5 of the roller is in a range of 29 to 36; when the roller structure 2 is composed of two rollers, the two rollers are respectively a first roller 21 and a second roller 22, and the first roller 21 is located on a side of the second roller 22 close to the power input end of the crankshaft 3; the ratio V / S1 of the displacement V of the pump body assembly to the bearing area S1 of the first roller 21 is in a range of 56 to 63; the displacement V of the pump body assembly and the bearing area S1 of the second roller 22 are in a range of 10 to 15; the displacement V of the pump body assembly and the bearing area S2 of the second roller 22 are in a range of 21 to 36; the displacement V of the pump body assembly and the bearing area S3 of the second roller 22 are in a range of 10 to 15; the displacement V of the pump body assembly and the bearing area S4 of the second roller 22 are in a range of 10 to 15. The ratio V / S2 of the bearing area S2 ranges from 60 to 70; wherein the displacement V of the pump body assembly is the exhaust volume of the pump body assembly in one working cycle; the bearing area S5 of the roller is the area of the orthographic projection of the contact surface between the roller and the crankshaft 3 in the first plane, and the first plane is perpendicular to the direction of the pressure applied by the crankshaft 3 to the roller; the bearing area S1 of the first roller 21 is the area of the orthographic projection of the contact surface between the first roller 21 and the crankshaft 3 in the second plane, and the second plane is perpendicular to the direction of the pressure applied by the crankshaft 3 to the first roller 21; the bearing area S2 of the second roller 22 is the area of the orthographic projection of the contact surface between the second roller 22 and the crankshaft 3 in the third plane, and the third plane is perpendicular to the direction of the pressure applied by the crankshaft 3 to the second roller 22. By designing the bearing area (effective force bearing area) of the contact surface between the roller structure 2 and the crankshaft 3, for a pump body assembly with a single roller structure, the ratio V / S5 of the displacement V of the pump body assembly to the bearing area S5 of the roller is in the range of 29 to 36; for a pump body assembly with a double roller structure, the ratio V / S1 of the displacement V of the pump body assembly to the bearing area S1 of the first roller 21 is in the range of 56 to 63; the ratio V / S2 of the displacement V of the pump body assembly to the bearing area S2 of the second roller 22 is in the range of 60 to 70. Through the above settings, the contact surface area between the crankshaft 3 and the roller structure 2 is in a better range, which can form an oil film of appropriate thickness between the two, improve the lubrication effect, reduce the friction power loss of the pump body assembly, and improve the energy efficiency of the rotor compressor.
[0051] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.
[0052] 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, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0053] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A pump assembly, comprising a cylinder (1), a roller structure (2) installed in a compression chamber of the cylinder (1), and a crankshaft (3), wherein the roller structure (2) is sleeved on the crankshaft (3) so as to drive the roller structure (2) to roll along the inner wall of the compression chamber through the crankshaft (3); characterized in that: When the roller structure (2) is a roller, the ratio V / S5 of the displacement V of the pump assembly to the bearing area S5 of the roller is in the range of 29 to 36; When the roller structure (2) is composed of two rollers, the two rollers are respectively a first roller (21) and a second roller (22), and the first roller (21) is located on a side of the second roller (22) close to the power input end of the crankshaft (3); a ratio V / S1 of the displacement V of the pump body assembly to the bearing area S1 of the first roller (21) is in a range of 56 to 63; a ratio V / S2 of the displacement V of the pump body assembly to the bearing area S2 of the second roller (22) is in a range of 60 to 70; The displacement V of the pump assembly is the displacement of the pump assembly in one working cycle; the bearing area S5 of the roller is the area of the orthographic projection of the contact surface between the roller and the crankshaft (3) in a first plane, and the first plane is perpendicular to the direction of the pressure applied by the crankshaft (3) to the roller; the bearing area S1 of the first roller (21) is the area of the orthographic projection of the contact surface between the first roller (21) and the crankshaft (3) in a second plane, and the second plane is perpendicular to the direction of the pressure applied by the crankshaft (3) to the first roller (21); the bearing area S2 of the second roller (22) is the area of the orthographic projection of the contact surface between the second roller (22) and the crankshaft (3) in a third plane, and the third plane is perpendicular to the direction of the pressure applied by the crankshaft (3) to the second roller (22).
2. The pump assembly according to claim 1, characterized in that: When the roller structure (2) is a roller, the contact surface between the roller and the crankshaft (3) is a cylindrical surface, the diameter of the cylindrical surface is d5, and the height of the cylindrical surface is h5; the bearing area of the roller is S5 = d5 × h5; When the roller structure (2) is composed of two rollers, the contact surface between the first roller (21) and the crankshaft (3) is a first cylindrical surface, and the contact surface between the second roller (22) and the crankshaft (3) is a second cylindrical surface; the diameter of the first cylindrical surface is d1, the height of the first cylindrical surface is h1, the diameter of the second cylindrical surface is d2, and the height of the second cylindrical surface is h2; the bearing area S1 of the first roller (21) is S1 = d1 × h1, and the bearing area S2 of the second roller (22) is S2 = d2 × h2.
3. The pump assembly according to claim 1, characterized in that: When the roller structure (2) is composed of two rollers, the ratio V / S1 of the displacement V of the pump body assembly to the bearing area S1 of the first roller (21) is in the range of 56 to 60; the ratio V / S2 of the displacement V of the pump body assembly to the bearing area S2 of the second roller (22) is in the range of 60 to 66.
4. The pump assembly according to claim 1, characterized in that: When the roller structure (2) is composed of two rollers, the ratio V / S1 of the displacement V of the pump body assembly to the bearing area S1 of the first roller (21) is in the range of 60 to 63; the ratio V / S2 of the displacement V of the pump body assembly to the bearing area S2 of the second roller (22) is in the range of 66 to 70.
5. The pump assembly according to claim 1, characterized in that: The pump body assembly comprises a main bearing (4) and a secondary bearing (5), wherein the main bearing (4) and the secondary bearing (5) are correspondingly arranged at opposite ends of the cylinder (1) so as to support the crankshaft (3) through the main bearing (4) and the secondary bearing (5); the main bearing (4) is located on a side of the secondary bearing (5) close to a power input end of the crankshaft (3); when the roller structure (2) is a roller, a ratio V / S6 of a displacement V of the pump body assembly to a bearing area S6 of the main bearing (4) has a value range of 22 to 27; a ratio V / S7 of a displacement V of the pump body assembly to a bearing area S7 of the secondary bearing (5) has a value range of 48 to 57; The load-bearing area S6 of the main bearing (4) is the area of the orthographic projection of the contact surface between the main bearing (4) and the crankshaft (3) in a fourth plane, and the fourth plane is perpendicular to the direction of the pressure applied by the main bearing (4) to the crankshaft (3); the load-bearing area S7 of the auxiliary bearing (5) is the area of the orthographic projection of the contact surface between the auxiliary bearing (5) and the crankshaft (3) in a fifth plane, and the fifth plane is perpendicular to the direction of the pressure applied by the auxiliary bearing (5) to the crankshaft (3).
6. The pump assembly according to claim 1, characterized in that: The pump body assembly comprises a main bearing (4) and a secondary bearing (5), wherein the main bearing (4) and the secondary bearing (5) are correspondingly arranged at opposite ends of the cylinder (1) so as to support the crankshaft (3) through the main bearing (4) and the secondary bearing (5); the main bearing (4) is located on a side of the secondary bearing (5) close to a power input end of the crankshaft (3); when the roller structure (2) is composed of the first roller (21) and the second roller (22), the ratio V / S3 of the displacement V of the pump body assembly to the bearing area S3 of the main bearing (4) is in the range of 37 to 44; the ratio V / S4 of the displacement V of the pump body assembly to the bearing area S4 of the secondary bearing (5) is in the range of 76 to 88; The load-bearing area S3 of the main bearing (4) is the area of the orthographic projection of the contact surface between the main bearing (4) and the crankshaft (3) in a fourth plane, and the fourth plane is perpendicular to the direction of the pressure applied by the main bearing (4) to the crankshaft (3); the load-bearing area S4 of the auxiliary bearing (5) is the area of the orthographic projection of the contact surface between the auxiliary bearing (5) and the crankshaft (3) in a fifth plane, and the fifth plane is perpendicular to the direction of the pressure applied by the auxiliary bearing (5) to the crankshaft (3).
7. The pump assembly according to claim 6, characterized in that: The ratio V / S3 of the displacement V of the pump body assembly to the bearing area S3 of the main bearing (4) is in the range of 37 to 41; the ratio V / S4 of the displacement V of the pump body assembly to the bearing area S4 of the secondary bearing (5) is in the range of 76 to 80.
8. The pump assembly according to claim 6, characterized in that: The ratio V / S3 of the displacement V of the pump body assembly to the bearing area S3 of the main bearing (4) is in the range of 41 to 44; the ratio V / S4 of the displacement V of the pump body assembly to the bearing area S4 of the secondary bearing (5) is in the range of 80 to 88.
9. The pump assembly according to claim 6, characterized in that: The contact surface between the main bearing (4) and the crankshaft (3) is a third cylindrical surface, and the contact surface between the auxiliary bearing (5) and the crankshaft (3) is a fourth cylindrical surface; the diameter of the third cylindrical surface is d3, the height of the third cylindrical surface is h3, the diameter of the fourth cylindrical surface is d4, and the height of the fourth cylindrical surface is h4; the bearing area S3 of the main bearing (4) is equal to d3×h3, and the bearing area S4 of the auxiliary bearing (5) is equal to d4×h4.
10. A rotary compressor, characterized in that: The rotary compressor comprises: A pump body assembly (100), wherein the pump body assembly (100) is the pump body assembly according to any one of claims 1 to 9; A motor assembly (200), the motor assembly (200) being used to drive the crankshaft (3) of the pump body assembly (100) to rotate; The liquid separator (300) is used to separate gaseous refrigerant from liquid refrigerant; the liquid separator (300) is connected to the air intake port of the cylinder (1) of the pump body assembly (100) to supply the gaseous refrigerant to the cylinder (1).
11. An air conditioner, characterized in that: The air conditioner includes the rotary compressor according to claim 10.