Sectional type roller coating piston and inclined plate type piston compressor
By using a segmented roller-coated piston in the inclined plate piston compressor, the problem of cylinder bore strain caused by excessive thickness of the entire piston surface is solved, and the effects of reducing noise, extending service life and reducing production costs are achieved.
Patent Information
- Application Number
- CN202422280187.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-19
AI Technical Summary
In existing inclined plate piston compressors, the thickness variance of the entire piston surface treatment is too large, resulting in cylinder bore strain problems, increasing noise and reducing service life.
A segmented roller coating piston is adopted, and the surface treatment length is set according to the actual contact surface of the piston, and only the portion in contact with the piston hole on the first sealing unit, the second sealing unit and the bridge unit is rolled.
It effectively avoids the problem of excessive thickness of the entire piston surface treatment, reduces the noise of the compressor, increases service life, reduces production costs, and improves user satisfaction.
Smart Images
Figure CN223035201U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of automotive air-conditioning compressors, in particular to a segmented roller-coated piston and a swash plate piston compressor. Background Art
[0002] With the development of China's economic society and the improvement of people's living standards, the number of automobiles in the country is increasing, and people's requirements for the comfort, vibration and noise of automobiles are also getting higher and higher. Therefore, major automobile manufacturers all pay attention to the vibration, noise and comfort of automobiles. At present, automotive air conditioners are not only used in sedans, but also used more and more in mini-cars. The vibration and noise problems caused by automotive air conditioners are increasingly being taken seriously. In the air-conditioning system of an automobile, the compressor is the heart of the system. Therefore, many noises in the air-conditioning system are caused by the compressor.
[0003] In the existing swash plate piston compressor, the appearance of the piston is subjected to complete surface treatment, and some parts that do not contact the inner wall of the piston hole also need to be surface-treated. Due to the complex shape of the piston surface, in order to ensure that the thickness of the overall surface treatment meets the standard, the thickness variance of the surface treatment is too large. When the surface treatment on the contact surface between the piston and the piston hole surface is too thick, it will cause the problem of cylinder hole scratching. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a segmented roller-coated piston and a swash plate piston compressor, which overcome the difficulties in the prior art through special structural design.
[0005] A segmented roller-coated piston provided by the utility model is installed in a piston hole and connected to a piston rod. It is characterized in that it includes a first sealing unit, a second sealing unit and a bridging unit; the first sealing unit and the second sealing unit respectively form two ends of the piston, and their outer diameters match the inner diameter of the piston hole; the bridging unit is located between the first sealing unit and the second sealing unit, and its two ends are respectively fixed to the first sealing unit and the second sealing unit; the piston rod passes through the first sealing unit and the bridging unit and is connected to the second sealing unit; only the parts of the first sealing unit, the second sealing unit and the bridging unit that contact the piston hole are roller-coated.
[0006] Further, the first sealing unit includes a first sealing module and a piston rod limiting module; both the first sealing module and the piston rod limiting module are cylindrical; the outer diameter of the piston rod limiting module is smaller than the outer diameter of the first sealing module; the piston rod limiting module is coaxially fixed on the first sealing module; a through hole matching the diameter of the piston rod is arranged at the center of the piston rod limiting module.
[0007] Further, roll coating is performed on the side surface portion of the cylinder of the first sealing module.
[0008] Further, the second sealing unit includes a second sealing module and a piston rod fixing module; both the second sealing module and the piston rod fixing module are cylindrical; the outer diameter of the piston rod fixing module is smaller than the outer diameter of the second sealing module; the piston rod fixing module is coaxially fixed on the second sealing module; the piston rod is connected to the piston rod fixing module.
[0009] Further, roll coating is performed on the side surface portion of the cylinder of the second sealing module.
[0010] Further, the bridging unit is semi-circular arc-shaped; the diameter of the semi-circular arc matches the inner diameter of the piston hole.
[0011] Further, roll coating is performed on the middle section of the outer arc surface of the semi-circular arc.
[0012] The present utility model also discloses an inclined plate type piston compressor using the above-mentioned segmented roll-coated piston, which is characterized by including a front cover, a rear cover, a cylinder block, an inclined plate, a main shaft and a piston; the front cover and the rear cover are respectively fixed at the front and rear ends of the cylinder block, thereby forming a hollow inner cavity in the cylinder block; a piston cavity is arranged in the middle of the inner cavity, dividing the inner cavity into a medium pressure cavity and a high and low pressure cavity; the medium pressure cavity is located between the front cover and the piston cavity; the high and low pressure cavity is located between the piston cavity and the rear cover; a piston hole and a main shaft hole are arranged on the piston cavity; the piston is sleeved in the piston cavity and connected to one end of the piston rod; the other end of the piston rod is connected to the inclined plate; the main shaft extends into the main shaft hole and is drivingly connected to the inclined plate.
[0013] Further, the main shaft hole is located at the center of the piston cavity; there are multiple piston holes, which are circumferentially distributed with the main shaft hole as the center.
[0014] Further, the multiple piston holes are evenly circumferentially distributed with the main shaft hole as the center.
[0015] For the segmented roll-coated piston and the inclined plate type piston compressor of the present utility model, by matching the length of the set surface treatment of the piston with the inner wall of the piston hole and setting the surface treatment length according to the actual contact surface of the piston, the problem of excessive thickness of the entire circumferential treatment of the piston surface is avoided. Compared with the prior art, its remarkable features are: solving the problem of cylinder block scoring caused by excessive thickness of the entire circumferential treatment of the piston surface, thereby reducing the self-noise of the compressor, increasing the service life of the compressor, reducing the production cost, improving the productivity of the compressor, and enhancing the user satisfaction. Description of the Drawings
[0016] Figure 1 is a schematic structural view of a preferred embodiment of the segmented roller coating piston of the present utility model;
[0017] Figure 2 is a schematic view of the roller coating area of a preferred embodiment of the segmented roller coating piston of the present utility model;
[0018] Figure 3 is a schematic structural view of a preferred embodiment of an inclined plate type piston compressor using the segmented roller coating piston of the present utility model.
[0019] Wherein, 100 - the first sealing unit, 200 - the second sealing unit, 300 - the bridging unit;
[0020] 101 - the first sealing module, 102 - the piston rod limiting module, 103 - the first roller coating area; 201 - the second sealing module, 202 - the piston rod fixing module, 203 - the second roller coating area, 301 - the third roller coating area;
[0021] 1 - the front cover, 2 - the rear cover, 3 - the cylinder block, 4 - the inclined plate, 5 - the main shaft, 6 - the bolt hole; 31 - the piston cavity 31, 32 - the medium pressure cavity, 33 - the high and low pressure cavity. Specific embodiments
[0022] The following will describe the specific embodiments of the present utility model with reference to the accompanying drawings. Embodiment
[0023] Please refer to Figure 1 and Figure 2 , the present utility model discloses a segmented roller coating piston, which is used for an inclined plate type piston compressor, is installed in a piston hole, and is driven by a piston rod connected thereto to reciprocate. A preferred embodiment thereof is composed of a first sealing unit 100, a second sealing unit 200 and a bridging unit 300.
[0024] The shape of the piston is similar to a dumbbell. The first sealing unit 100 and the second sealing unit 200 respectively form the two ends of the piston, and their outer diameters match the inner diameter of the piston hole. The bridging unit 300 is located between the first sealing unit 100 and the second sealing unit 200, and its two ends are respectively connected and fixed to the first sealing unit 100 and the second sealing unit 200, thereby connecting the three into a whole. The first sealing unit 100 and the second sealing unit 200 are in sealing cooperation with the inner wall of the piston hole. When the piston reciprocates in the piston hole, the working medium can be compressed.
[0025] The first sealing unit 100 is composed of a first sealing module 101 and a piston rod limiting module 102. The first sealing module 101 is cylindrical, and its outer diameter matches the inner diameter of the piston hole. Therefore, a seal is formed between the side surface of the cylinder of the first sealing module 101 and the inner wall of the piston hole. At a position near the end face on the side surface of the cylinder of the first sealing module 101, a portion with a length of 18 mm to 18.5 mm is selected to form a first roller coating area 103. Roller coating is performed on the first roller coating area 103 to increase wear resistance. The piston rod limiting module 102 is also cylindrical, but its outer diameter is smaller than that of the first sealing module 101. The piston rod limiting module 102 is coaxially sleeved and fixed on the first sealing module 101. A through hole is also provided at the center of the piston rod limiting module 102. The diameter of the through hole matches the outer diameter of the piston rod.
[0026] The second sealing unit 200 is composed of a second sealing module 201 and a piston rod fixing module 202. The second sealing module 201 is cylindrical, and its outer diameter matches the inner diameter of the piston hole. Therefore, a seal is formed between the side surface of the cylinder of the second sealing module 201 and the inner wall of the piston hole. At a position near the end face on the side surface of the cylinder of the second sealing module 201, a portion with a length of 18 mm to 18.5 mm is selected to form a second roller coating area 203. Roller coating is performed on the second roller coating area 203 to increase wear resistance. The piston rod fixing module 202 is also cylindrical, but its outer diameter is smaller than that of the second sealing module 201. The piston rod fixing module 202 is coaxially sleeved and fixed on the second sealing module 201. The piston rod is connected to the center of the piston rod fixing module 21.
[0027] The bridging unit 300 is in the shape of a semi-circular arc. The diameter of the semi-circular arc matches the inner diameter of the piston hole and plays a role in limiting. Therefore, during operation, the outer side of the arc surface of the semi-circular arc will also rub against the inner wall of the piston hole. In the middle part of the outer side of the arc surface of the semi-circular arc, a region with a length of 12 mm to 12.5 mm is selected to form a third roller coating area 301. Roller coating treatment is performed on the third roller coating area 301 to increase wear resistance characteristics.
[0028] When installed in an inclined plate piston compressor, the piston rod passes through the through hole at the center of the piston rod limiting module 102 on the first sealing unit 100, then passes through the center of the semi-circular arc of the bridging unit 300, and finally is connected and fixed to the piston rod fixing module 202 on the second sealing unit 200. The piston rod drives the piston rod fixing module 202, and finally drives the piston to reciprocate in the piston hole.
[0029] Please refer to Figure 3 , the present utility model also discloses an inclined plate piston compressor using the above-mentioned segmented roller coating piston. A preferred embodiment thereof includes a front cover 1, a rear cover 2, a cylinder block 3, an inclined plate 4, a main shaft 5, and a bolt hole 6.
[0030] The front cover 1 and the rear cover 2 are respectively fixed to the front and rear ends of the cylinder block 3. After the cylinder block 3 is enclosed by using the bolts in the bolt holes 6, a hollow internal cavity is formed. The middle part of the cylinder block 3 protrudes to form a piston cavity 31. The piston cavity 31 further divides the internal cavity into a medium-pressure cavity 32 and a high-low pressure cavity 33.
[0031] The cavity between the front cover 1 and the piston cavity 31 forms the medium-pressure cavity 32. And the cavity between the piston cavity 31 and the rear cover 2 is the high-low pressure cavity 33. An inclined plate 4 is arranged in the medium-pressure cavity 32. Six piston holes and a main shaft hole are arranged on the piston cavity 31. The main shaft hole is located at the center of the piston cavity, and the piston holes are evenly distributed circumferentially with the main shaft hole as the center (one every 60 degrees). The number of pistons corresponds to the number of piston holes one by one. In this embodiment, there are six pistons, which are respectively sleeved in the piston holes. The main shaft 5 passes through the front cover 1 and is sleeved in the main shaft hole through the medium-pressure cavity. The inclined plate 4 is connected to the main shaft 5 and rotates under the drive of the main shaft 5. The number of piston rods also corresponds to the number of pistons one by one. One end of each piston rod is connected to the inclined plate 4, and the other end is connected to the corresponding piston. When the main shaft 5 rotates, the inclined plate 4 converts the circular motion into the reciprocating motion of the piston rod, driving the piston to reciprocate in the piston hole. The part of the piston surface that is partially roller-coated is more wear-resistant while its outer diameter is more precise, so that it can withstand friction while reducing the risk of cylinder scoring and extending the working life of the swashplate piston compressor.
[0032] The above is only the preferred embodiment of the present invention and is not used to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made to the content within the scope of the patent application of the present invention should fall within the technical scope of the present invention.
Claims
1. A segmented roller piston, installed in a piston hole and connected to a piston rod, characterized in that: It includes a first sealing unit, a second sealing unit and a bridging unit; the first sealing unit and the second sealing unit respectively form the two ends of the piston, and their outer diameters match the inner diameter of the piston hole; the bridging unit is located between the first sealing unit and the second sealing unit, and its two ends are respectively fixed to the first sealing unit and the second sealing unit; the piston rod passes through the first sealing unit and the bridging unit and is connected to the second sealing unit; only the parts of the first sealing unit, the second sealing unit and the bridging unit that are in contact with the piston hole are rolled.
2. The segmented roller coating piston according to claim 1, characterized in that: The first sealing unit includes a first sealing module and a piston rod limiting module; the first sealing module and the piston rod limiting module are both cylindrical; the outer diameter of the piston rod limiting module is smaller than the outer diameter of the first sealing module; the piston rod limiting module is coaxially fixed on the first sealing module; a through hole matching the diameter of the piston rod is arranged at the center of the piston rod limiting module.
3. The segmented rolling piston according to claim 2, characterized in that: Roll coating is applied on the side surface of the cylinder of the first sealing module.
4. The segmented rolling piston according to claim 1, characterized in that: The second sealing unit includes a second sealing module and a piston rod fixing module; the second sealing module and the piston rod fixing module are both cylindrical; the outer diameter of the piston rod fixing module is smaller than the outer diameter of the second sealing module; the piston rod fixing module is coaxially fixed on the second sealing module; the piston rod is connected to the piston rod fixing module.
5. The segmented rolling piston according to claim 4, characterized in that: Roll coating is applied on the side surface of the cylinder of the second sealing module.
6. The segmented rolling piston according to claim 1, characterized in that: The bridging unit is in a semicircular arc shape; the diameter of the semicircular arc matches the inner diameter of the piston hole.
7. The segmented rolling piston according to claim 6, characterized in that: The middle section of the outer side of the semicircular arc surface is rolled.
8. A swash plate type piston compressor using the segmented roller coating piston as claimed in claim 1, characterized in that: It comprises a front cover, a rear cover, a cylinder body, a slant plate, a main shaft and a piston; the front cover and the rear cover are respectively fixed to the front and rear ends of the cylinder body, so that a hollow internal cavity is formed in the cylinder body; a piston cavity is arranged in the middle of the internal cavity, and the internal cavity is divided into a medium-pressure cavity and a high-low-pressure cavity; the medium-pressure cavity is located between the front cover and the piston cavity; the high-low-pressure cavity is located between the piston cavity and the rear cover; The piston hole and the spindle hole are arranged on the piston cavity; the piston is sleeved in the piston cavity and connected to one end of the piston rod; the other end of the piston rod is connected to the inclined plate; the spindle extends into the spindle hole and is driven and connected to the inclined plate.
9. The inclined plate type piston compressor according to claim 8, characterized in that: The main shaft hole is located at the center of the piston cavity; there are multiple piston holes, which are distributed along the circumferential direction with the main shaft hole as the center.
10. The inclined plate type piston compressor according to claim 9, characterized in that: The plurality of piston holes are evenly distributed along the circumferential direction with the main shaft hole as the center.