CN113790157A

CN113790157A - Bearing cylinder, compressor and air conditioner

Info

Publication number: CN113790157A
Application number: CN202111236138.8A
Authority: CN
Inventors: 万鹏凯; 莫宗林; 任丽萍; 罗发游; 邹鹏
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-10-22
Filing date: 2021-10-22
Publication date: 2021-12-14
Also published as: WO2023065753A1

Abstract

The application provides a bearing cylinder, a compressor and an air conditioner. The bearing cylinder comprises an outer ring (1), a rolling body (2) and an inner ring (3), wherein the rolling body (2) can be rotatably arranged between the outer ring (1) and the inner ring (3), the outer ring (1) is axially provided with a screw avoiding hole (4), a compression medium circulation channel (5) and a lubricating oil circulation channel (6) in a penetrating mode, and the lubricating oil circulation channel (6) is configured to convey lubricating oil to a cavity between the outer ring (1) and the inner ring (3). According to the bearing cylinder, abnormal abrasion of the bearing cylinder can be effectively reduced, and the compression energy efficiency of the compressor is improved.

Description

Bearing cylinder, compressor and air conditioner

Technical Field

The application relates to the technical field of compressors, in particular to a bearing cylinder, a compressor and an air conditioner.

Background

The head of a sliding vane of the traditional rotary vane compressor and the inner wall of an air cylinder are seriously abraded, so that the mechanical power consumption of the compressor is larger, the integral energy efficiency is poorer, and even the reliability problems such as abnormal abrasion are caused when the integral energy efficiency is serious.

The related art provides a compressor structure, and a bearing cylinder structure is adopted, so that the relative sliding of the head of a slip sheet and the inner wall of an inner ring is guaranteed to be converted into the rolling motion of the inner ring and a rolling body, the mechanical power consumption of the compressor is reduced, and the energy efficiency of the compressor is improved. However, the bearing cylinder structure and related parameters of the scheme are unreasonable in design, so that the compressor is easy to have poor compression efficiency, even abnormal wear and the like.

Disclosure of Invention

Therefore, the technical problem that this application will be solved lies in providing a bearing cylinder, compressor and air conditioner, can effectively reduce the unusual wearing and tearing of bearing cylinder, improves the compression efficiency of compressor.

In order to solve the above problem, the present application provides a bearing cylinder, including outer lane, rolling element and inner circle, the rolling element can set up between outer lane and inner circle with rotating, and the outer lane has been provided with screw dodge hole, compression medium circulation passageway and lubricating oil circulation passageway along the axial link up, and lubricating oil circulation passageway is configured as to carry lubricating oil to the cavity between outer lane and the inner circle.

Preferably, the inner diameter of the outer ring is D1, the outer diameter of the inner ring is D2, and D1-D2 is more than or equal to 2 mm.

Preferably, the radial thickness L of the inner ring is more than or equal to 2 mm.

Preferably, the axial total height of the rolling body is H, the axial height of the outer ring is H, and H is more than or equal to H/4.

Preferably, the axial height of the inner ring is less than the axial height of the outer ring.

Preferably, the bearing cylinder is of an inner ring and outer ring integrated structure, the height difference of the outer ring and the inner ring at two ends is consistent, wherein the height difference of a single side is delta h1, and delta h1 is more than or equal to 0.01 and less than or equal to 0.03 mm.

Preferably, the outer ring and the inner ring of the bearing cylinder are of detachable separation structures, the total height difference delta H2 between the outer ring and the inner ring is H1-H2, and delta H2 is not less than 0.015mm and not more than 0.05 mm.

Preferably, the lubricating oil circulatesThe number of the channels is at least one, and the flow area S of a single lubricating oil flow channel is more than or equal to 3mm²。

According to another aspect of the present application, there is provided a compressor comprising a bearing cylinder, the bearing cylinder being the bearing cylinder described above.

Preferably, the compressor has a volume V in mm³The axial height of the outer ring is H1 with the unit of mm, 1.9mm²≤V/(1000*H1)≤3.8mm²。

Preferably, 2.2mm²≤V/(1000*H1)≤3.0mm²。

According to another aspect of the present application, there is provided an air conditioner including the bearing cylinder or the compressor described above.

The application provides a bearing cylinder, including outer lane, rolling element and inner circle, the rolling element can set up between outer lane and inner circle with rotating, and the outer lane has a perfect understanding along the axial and is provided with screw dodge hole, compression medium circulation channel and lubricating oil circulation channel, and lubricating oil circulation channel is configured to carry lubricating oil to the cavity between outer lane and the inner circle. This bearing cylinder can utilize lubricating oil circulation passageway to carry lubricating oil to the rolling element installation cavity between outer lane and the inner circle through set up lubricating oil circulation passageway on the outer lane to can conveniently lubricate the rolling element, reduce the moving resistance, reduce bearing cylinder's unusual wearing and tearing, can utilize lubricating oil to seal bearing cylinder simultaneously, improve bearing cylinder bearing capacity, when improving the compressor efficiency, can improve compressor's reliability.

Drawings

FIG. 1 is a schematic structural view of a bearing cylinder according to an embodiment of the present application;

FIG. 2 is a cross-sectional structural schematic view of a bearing cylinder according to an embodiment of the present application;

FIG. 3 is an enlarged schematic view of FIG. 2 at L;

FIG. 4 is a dimensional view of a bearing cylinder according to an embodiment of the present application;

FIG. 5 is a dimensional view of a bearing cylinder according to an embodiment of the present application;

FIG. 6 is a structural dimension diagram of a rolling element of a bearing cylinder according to an embodiment of the present application;

fig. 7 is a graph of main shaft long and short bearing load and compressor COP for different V/(1000 × H1).

The reference numerals are represented as:

1. an outer ring; 2. a rolling body; 3. an inner ring; 4. screw avoiding holes; 5. a compressed media flow channel; 6. a lubricant oil circulation passage; 7. a cage.

Detailed Description

Referring to fig. 1 to 7 in combination, according to an embodiment of the present application, a bearing cylinder includes an outer ring 1, a rolling element 2, and an inner ring 3, the rolling element 2 is rotatably disposed between the outer ring 1 and the inner ring 3, the outer ring 1 is axially provided with a screw relief hole 4, a compression medium flow passage 5, and a lubricating oil flow passage 6 in a penetrating manner, and the lubricating oil flow passage 6 is configured to supply lubricating oil to a cavity between the outer ring 1 and the inner ring 3.

This bearing cylinder is through setting up lubricating oil circulation passageway 6 on outer lane 1, can utilize lubricating oil circulation passageway 6 to the rolling element installation intracavity between outer lane 1 and the inner circle 3 transport lubricating oil to can conveniently lubricate rolling element 2, reduce the moving resistance, reduce bearing cylinder's unusual wearing and tearing, can utilize lubricating oil to seal bearing cylinder simultaneously, improve bearing cylinder bearing capacity, when improving the compressor efficiency, can improve compressor's reliability.

In one embodiment, an oil passage is provided at a side of the lubricating oil passage 6 close to the inner ring 3, and the oil passage communicates with the lubricating oil passage 6 and the cavity between the outer ring 1 and the inner ring 3, so that the lubricating oil in the lubricating oil passage 6 can be conveniently conveyed into the cavity to lubricate the rolling elements 2 between the outer ring 1 and the inner ring 3. In order to ensure the reasonability of oil supply amount and avoid that a large amount of lubricating oil enters a cavity between the outer ring 1 and the inner ring 3, so that the high pressure of an oil path causes adverse effect on the inner ring 3, or the amount of the lubricating oil entering the cavity between the outer ring 1 and the inner ring 3 is too small, the oil passing area of the oil path channel is reasonably designed, and in one embodiment, the oil passing area of the oil path channel is 0.03mm²～0.1mm²。

The bearing cylinder further comprises a cage 7, the cage 7 is arranged between the outer ring 1 and the inner ring 3, and the rolling elements 2 are mounted through the cage 7.

In one embodiment, the screw avoiding hole 4 is a plurality of structures with different sizes, so that the installation requirements of screws with different specifications can be met. In this embodiment, the screw avoiding holes 4 are divided into two sizes, and the screw avoiding holes 4 of the two sizes are alternately arranged in the circumferential direction of the outer ring 1.

In one embodiment, the compressed medium flow channel 5 is also a plurality of differently sized structures, either circular or kidney shaped. Wherein the kidney-shaped holes are more suitable for situations where the structural distance is insufficient, but a larger flow area is required.

Lubricating oil circulation passageway 6 is in order to satisfy bearing cylinder or other structure pump body part lubricating oil circulation demands, can be the structure of a plurality of different shapes, and in this embodiment, lubricating oil circulation passageway 6 is the round hole.

In one embodiment, the number of the lubricating oil flow channels 6 is at least one, and the flow area S of a single lubricating oil flow channel 6 is more than or equal to 3mm²Therefore, the lubricating oil circulation channel 6 can be ensured to have a large enough circulation area, the flow resistance of the lubricating oil is reduced, the lubricating oil can be ensured to be full of the space in front of the outer ring 1 and the inner ring 3, the rolling body 2 is fully lubricated, the friction between the rolling body 2 and the outer ring 1 and the inner ring 3 is reduced, the friction loss is reduced, and meanwhile, the lubricating oil can be more fully utilized to realize the sealing of the bearing cylinder.

Because the rolling element 2 needs to be lubricated, oil inlet needs to be carried out from the end face of the outer ring 1, in order to ensure the lubrication of the rolling element 2, an oil inlet channel between the outer ring 1 and the inner ring 3 is required to be large enough, in one embodiment, the inner diameter of the outer ring 1 is D1, the outer diameter of the inner ring 3 is D2, and D1-D2 are larger than or equal to 2mm, so that lubricating oil can be more fully contacted with the rolling element 2, and the rolling element 2 is effectively lubricated.

In one embodiment, the radial thickness L of the inner ring 3 is more than or equal to 2mm, so that the end surface of the inner ring 3 has enough sealing area, a sealing oil film can be formed, and the sealing performance of the inner ring 3 in the rotating process is ensured. In the present embodiment, when the inner ring 3 is chamfered, the radial thickness L of the inner ring 3 is a thickness after the chamfering is removed, that is, the radial thickness of the inner ring 3 should be a width of an end face capable of forming an oil film.

In one embodiment, the rolling elements 2 have a total axial height H, the outer ring 1 has an axial height H, H ≧ H/4. As the bearing cylinder is the weakest structure in radial stress bearing, namely the rolling body 2, the actual bearing range is the contact distance between the rolling body 2 and the inner ring and the outer ring, in order to meet the bearing requirement of the compressor and prevent the inner ring 3 from being inclined to generate abnormal wear, the relation between the axial total height H of the rolling body 2 and the axial height H of the outer ring 1 is required to meet the requirement that H is more than or equal to H/4. Wherein, the single row of balls h is the diameter d of the rolling body; double-row balls h is 2 d; the h of the cylindrical roller or needle roller bearing is the effective contact height of the rolling elements 2 and the inner and outer races.

In one embodiment, the axial height of the inner ring 3 is smaller than the axial height of the outer ring 1. Because the bearing cylinder inner ring 3 needs to rotate, and the outer ring 1 is pressed on the upper flange and the lower flange through screws and is fixedly arranged. In order to ensure that the inner ring 3 rotates smoothly and meet the sealing requirements of the rolling body space and the front cavity and the rear cavity of the sliding vane, the axial height of the inner ring 3 is required to be smaller than that of the outer ring 1, so that the inner ring 3 is prevented from being in contact abrasion with the upper flange or the lower flange.

In one embodiment, the bearing cylinder is of an inner ring and outer ring integrated structure, the height difference of the outer ring 1 and the inner ring 3 at two ends is consistent, wherein the height difference of a single side is delta h1, and delta h1 is more than or equal to 0.01 and less than or equal to 0.03 mm.

In one embodiment, the outer ring 1 and the inner ring 3 of the bearing cylinder are of detachable separation structures, the total height difference delta H2 between the outer ring 1 and the inner ring 3 is H1-H2, and delta H2 is not less than 0.015mm and not more than 0.05 mm.

According to an embodiment of the application, the compressor comprises a bearing cylinder, which is the bearing cylinder described above.

In one embodiment, the greater the compressor displacement, the greater its load, which the pump body is required to bear, in relation to the bearing cylinder height. In order to meet the requirements of compressor energy efficiency and bearing capacity, the volume of the compressor is defined as V unit which is mm³H1 is the axial height of the outer ring 1 inmm, the relationship between V and H1 is required to satisfy 1.9mm²≤V/(1000*H1)≤3.8mm²。

In one embodiment, 2.2mm²≤V/(1000*H1)≤3.0mm²。

The bearing of the pump body of the compressor is born by the upper flange and the lower flange, the larger the H1 is, the smaller the V/(1000H 1) is, the larger the span of the upper bearing and the lower bearing of the main shaft is, and the abnormal abrasion of the upper flange and the lower flange (the length of the main shaft and the short shaft) is more easy to occur, so the lower limit requirement is met. On the contrary, the smaller H1 is, the larger V/(1000H 1) is, the flatter the pump body is, the eccentricity is increased to ensure the V value, the load bearing of the upper flange and the lower flange (the main shaft length and the short shaft length) is also increased, and the energy efficiency of the compressor tends to rise first and then fall, so the upper limit requirement is increased.

Referring to fig. 7, when V/(1000 × H1) is in the above range, the load of the major and minor axes is small, and the COP of the compressor is large, so that the compressor can be effectively ensured to operate at the optimum energy efficiency.

According to an embodiment of the present application, an air conditioner includes the above-described bearing cylinder or the above-described compressor.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims

1. The utility model provides a bearing cylinder, its characterized in that, includes outer lane (1), rolling element (2) and inner circle (3), rolling element (2) can set up with rotating outer lane (1) with between inner circle (3), outer lane (1) has a perfect understanding along the axial and is provided with screw dodge hole (4), compression medium circulation passageway (5) and lubricating oil circulation passageway (6), lubricating oil circulation passageway (6) configured to outer lane (1) with cavity transport lubricating oil between inner circle (3).

2. Bearing cylinder according to claim 1, characterized in that the inner diameter of the outer ring (1) is D1 and the outer diameter of the inner ring (3) is D2, D1-D2 being 2mm or more.

3. A bearing cylinder according to claim 1, characterized in that the radial thickness L of the inner ring (3) is more than or equal to 2 mm.

4. Bearing cylinder according to claim 1, characterized in that the rolling elements (2) have a total axial height H and the outer ring (1) has an axial height H, H ≧ H/4.

5. A bearing cylinder according to claim 1, characterized in that the axial height of the inner ring (3) is smaller than the axial height of the outer ring (1).

6. The bearing cylinder according to claim 5, characterized in that the bearing cylinder is of an inner ring and outer ring integrated structure, the height difference of the outer ring (1) and the inner ring (3) at two ends is consistent, wherein the height difference of one side is delta h1, and 0.01-delta h 1-0.03 mm.

7. A bearing cylinder according to claim 5, characterized in that the outer ring (1) and the inner ring (3) of the bearing cylinder are of detachable and separate construction, and the difference in total height Δ H2 between the outer ring (1) and the inner ring (3) is H1-H2, 0.015mm ≦ Δ H2 ≦ 0.05 mm.

8. A bearing cylinder according to claim 1, characterized in that the number of said oil flow channels (6) is at least one, and the flow area S of a single said oil flow channel (6) is more than or equal to 3mm²。

9. A compressor comprising a bearing cylinder, wherein the bearing cylinder is as claimed in any one of claims 1 to 8.

10. Compressor according to claim 9, characterized in that the compressor has a volume V in mm³The axial height of the outer ring (1) is H1 with the unit of mm, 1.9mm²≤V/(1000*H1)≤3.8mm²。

11. A compressor according to claim 10, characterized in that 2.2mm²≤V/(1000*H1)≤3.0mm²。

12. An air conditioner characterized by comprising the bearing cylinder of any one of claims 1 to 8 or the compressor of any one of claims 9 to 11.