CN112483358A

CN112483358A - Oil return structure, compressor and refrigerator

Info

Publication number: CN112483358A
Application number: CN202011354773.1A
Authority: CN
Inventors: 魏会军; 熊克强; 徐敏; 严耀宗; 申婷
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-03-12
Anticipated expiration: 2040-11-27
Also published as: CN112483358B

Abstract

The application provides an oil return structure, compressor and air conditioner, communicate with each other including setting up first time oil passageway and fluid passageway in the pivot, still be provided with the oil extraction passageway in the pivot, the entry end of first time oil passageway with the oil extraction passageway is linked together, the exit end of first time oil passageway with the fluid passageway communicates with each other. The application provides an oil return structure, compressor and air conditioner can make partial lubricating oil backward flow when the high-speed rotation of pivot, reduces the oil extraction volume, avoids equipment wear, guarantees the operational reliability.

Description

Oil return structure, compressor and refrigerator

Technical Field

The application belongs to the technical field of refrigeration equipment, and particularly relates to an oil return structure, a compressor and an air conditioner.

Background

The oil discharge of the refrigerator compressor is an important index for the reliable operation of the compressor. When the compressor runs at a high rotating speed, the oil discharge amount of the compressor can be rapidly increased, if the oil discharge amount is too large, the oil return of a system is not timely, the oil storage in the compressor is insufficient, the phenomenon of difficult oil supply occurs, and finally the compressor is worn and damaged, so that the service life and the reliability of the compressor are influenced.

Disclosure of Invention

Therefore, the technical problem that this application will be solved lies in providing an oil return structure, compressor and air conditioner, can make partial lubricating oil backward flow when the high-speed rotation of pivot, reduces the oil extraction volume, avoids equipment wear, guarantees the operational reliability.

In order to solve the above problem, the application provides an oil return structure, communicate with each other including setting up first time oil passageway and fluid passageway in the pivot, still be provided with the oil extraction passageway in the pivot, the entry end of first time oil passageway with the oil extraction passageway is linked together, the exit end of first time oil passageway with the fluid passageway communicates with each other.

Optionally, first oil return channel still includes first oil return groove, first oil return groove sets up on the periphery wall of pivot, the oil extraction passageway includes first helicla flute, first helicla flute sets up on the periphery wall of pivot, first oil return groove with first helicla flute meets, fluid in the first helicla flute can flow extremely in the first oil return groove.

Optionally, the first oil return groove is arranged along the axial direction of the rotating shaft.

Optionally, the first oil return groove is arranged along the circumferential direction of the rotating shaft.

Optionally, one end of the first oil return groove connected to the first spiral groove is an inlet end, the first oil return groove further includes an outlet end, and an extending direction of the first oil return groove from the inlet end to the outlet end is the same as a rotating direction of the rotating shaft.

Optionally, the groove depth of the first oil return groove decreases progressively along the flowing direction of the oil liquid in the first oil return groove.

Optionally, the first oil return passage further includes a first oil return hole, the first oil return hole is opened in the rotating shaft, the first oil return hole is connected to the first oil return groove, and oil in the first oil return groove flows into the oil passage through the first oil return hole.

Optionally, the first oil return hole is arranged along a radial direction of the rotating shaft.

Optionally, the fluid passageway includes first section and second section, first section with first helicla flute meets, fluid in the first section can flow to in the first helicla flute, the second section with first oil return hole meets, fluid in the first oil return hole can flow to in the second section.

Optionally, the first section and the second section are arranged along an axis of the rotating shaft.

Optionally, the diameter of the second section is d, and d is not less than 2mm and not more than 6 mm.

Optionally, the distance between the second section and the axis of the rotating shaft increases along the direction close to the first section.

Optionally, an acute angle formed by the axis of the second section and the axis of the first section is 1 to 10 °.

Optionally, a first oil outlet is formed in the rotating shaft, and the oil passage is communicated with the first spiral groove through the first oil outlet.

Optionally, be provided with the second oil outlet on the periphery wall of pivot, the fluid passageway sets up in the pivot, the fluid passageway with be provided with the second oil gallery between the second oil outlet, the fluid passageway with the second oil outlet passes through the second oil gallery is linked together.

Optionally, the second oil return hole is arranged along the radial direction of the rotating shaft.

In another aspect of the present application, a compressor is provided, which includes the oil return structure as described above.

In another aspect of the present application, a refrigerator is provided, which includes the oil return structure as described above.

Advantageous effects

The oil return structure, the compressor and the air conditioner provided by the embodiment of the invention can enable part of lubricating oil to flow back when the rotating shaft rotates at a high speed, reduce the oil discharge amount, avoid equipment abrasion and ensure the operation reliability.

Drawings

FIG. 1 is a schematic structural diagram of example 1 of the present application;

FIG. 2 is a sectional view of a rotating shaft according to embodiment 1 of the present application;

FIG. 3 is a sectional view of a rotary shaft according to embodiment 2 of the present application;

FIG. 4 is a schematic structural diagram of embodiment 3 of the present application;

fig. 5 is a sectional view of embodiment 4 of the present application.

The reference numerals are represented as:

1. a rotating shaft; 11. a first helical groove; 12. a first oil return groove; 13. a first oil return hole; 141. a first stage; 142. a second stage; 15. a second oil return hole; 16. a first oil outlet hole; 17. and the second oil outlet hole.

Detailed Description

Referring to fig. 1 to 2 in combination, according to an embodiment of the present application, an oil return structure includes a first oil return channel disposed on a rotating shaft 1 and communicated with an oil liquid channel, an oil discharge channel further disposed on the rotating shaft 1, an inlet end of the first oil return channel is communicated with the oil discharge channel, and an outlet end of the first oil return channel is communicated with the oil liquid channel. Through setting up first oil return channel, can provide the backward flow route for partial lubricating oil when pivot 1 is high-speed to rotate, make partial lubricating oil backward flow, avoid measuring big lubricating oil when pivot 1 is high-speed to be discharged, reduced the oil extraction volume, avoid equipment wearing and tearing, guarantee operational reliability.

Further, lubricating oil can flow out in pivot 1 to the oil extraction passageway through the fluid passageway to by the oil extraction passageway discharge, and then lubricate other parts. When pivot 1 rotates at a high speed, a large amount of lubricating oil are deposited in the oil extraction passageway, through setting up first oil return passageway, can make in the oil extraction passageway some lubricating oil backward flow to the fluid passageway, and then prevent a large amount of discharges of lubricating oil, lead to 1 partial wear of pivot.

First oil return channel still includes first oil return groove 12, and first oil return groove 12 sets up on the periphery wall of pivot 1, and the oil extraction passageway includes first helicla flute 11, and first helicla flute 11 sets up on the periphery wall of pivot 1, and first oil return groove 12 meets with first helicla flute 11, and fluid in the first helicla flute 11 can flow to in the first oil return groove 12. By providing the first spiral groove 11, the lubricating oil discharged from the oil passage can flow along the first spiral groove 11. By providing the first oil return groove 12, a path is provided for the lubricating oil to return to the oil passage.

Further, the peripheral wall of the rotating shaft 1 is the circumferential outer wall of the rotating shaft 1.

Further, the extending direction of the first spiral groove 11 from the oil inlet end to the oil outlet end is opposite to the rotating direction of the rotating shaft 1.

First oil return groove 12 sets up along the axial of pivot 1, makes first oil return groove 12 and first helicla flute 11 form the angle, when pivot 1 was in low rotational speed, makes lubricating oil easily flow into to first helicla flute 11 in, when high rotational speed, because lubricating oil is more in first helicla flute 11, lubricating oil gets into in first oil return groove 12.

Further, the first oil return groove 12 is disposed along a generatrix of the rotating shaft 1.

The groove depth of the first oil return groove 12 decreases progressively along the flowing direction of the oil in the first oil return groove 12, so that the resistance of oil return through the first oil return groove 12 is increased, and the oil return through the first oil return groove 12 is prevented under the condition that the rotating shaft 1 is at a low rotating speed.

Further, the groove depth refers to a distance from the groove opening of the groove to the groove bottom, that is, a depth of the first oil return groove 12 in a radial direction of the rotating shaft 1.

The first oil return channel further comprises a first oil return hole 13, the first oil return hole 13 is formed in the rotating shaft 1, the first oil return hole 13 is connected with the first oil return groove 12, oil in the first oil return groove 12 flows into the oil channel through the first oil return hole 13, and lubricating oil in the first oil return groove 12 can return to the oil channel through the first oil return hole 13 and return oil through self gravity of the lubricating oil.

Further, the oil inlet end of the first oil return hole 13 is connected and communicated with the oil discharge end of the first oil return groove 12, and the oil discharge end of the first oil return hole 13 is connected and communicated with the oil passage.

The first oil return hole 13 is arranged along the radial direction of the rotating shaft 1, so that lubricating oil returns in the first oil return hole 13 against centrifugal force, and oil return is further avoided under the condition of low rotating speed.

Further, the first oil return hole 13 is disposed perpendicular to the first oil return groove 12.

The oil passage includes a first section 141 and a second section 142, the first section 141 is connected to the first spiral groove 11, oil in the first section 141 can flow into the first spiral groove 11, the second section 142 is connected to the first oil return hole 13, and oil in the first oil return hole 13 can flow into the second section 142.

Further, the first section 141 is connected to the second section 142, and the first section 141 is located below the second section 142.

Further, the diameter of the second section 142 is smaller than the diameter of the first section 141.

Further, the oil passage includes an exhaust passage for exhausting air so that the lubricating oil can be sucked into the oil passage, and in this embodiment, the second section 142 is a part of the exhaust passage.

The first section 141 and the second section 142 are disposed along the axis of the rotation shaft 1.

Further, the first section 141, the second section 142 and the rotating shaft 1 are coaxially disposed.

The diameter of the second section 142 is d, d is not less than 2mm and not more than 6mm, so as to ensure that the lubricating oil does not flow from the second section 142 to the first oil return hole 13 when the rotating shaft 1 is at a high rotating speed.

Be provided with first oil outlet 16 on the pivot 1, the fluid passageway is linked together through first oil outlet 16 and first helicla flute 11, through setting up first oil outlet 16, makes the interior exhaust lubricating oil of fluid passageway can enter into first helicla flute 11.

In another aspect of the present embodiment, a compressor is provided, which includes the oil return structure as described above.

Further, the oil passage is communicated with an oil pool of the compressor, and lubricating oil in the oil pool can be discharged into the first spiral groove 11 through the oil passage. When the rotating shaft 1 rotates at a high speed, lubricating oil in the first oil return groove 12 and the first oil return hole 13 can be discharged back into the oil pool through the oil passage, so that oil return is realized.

Further, the rotating shaft 1 is a crankshaft of the compressor.

In another aspect of the present embodiment, a refrigerator is provided, which includes the oil return structure as described above.

Further, when the rotating shaft 1 rotates at a high speed, a large amount of lubricant enters the refrigerator system, increasing thermal resistance of the evaporator and the condenser, resulting in low heat transfer efficiency, and further resulting in increased power consumption. This embodiment has the structure through the setting, and the bent axle pump oil mass is too big when having solved the high rotational speed of compressor main shaft, leads to the compressor oil extraction big, reduces the problem of system efficiency, promotes compressor matching efficiency.

Example 2

As shown in fig. 3, the present embodiment is different from embodiment 1 in that the distance from the axis of the rotating shaft 1 of the second section 142 in the direction approaching the first section 141 increases in the present embodiment. That is, the second section 142 is not coaxial with the rotating shaft 1, the second section 142 is inclined from top to bottom towards the circumferential outer side of the rotating shaft 1, and since the second section 142 is against the direction of the centrifugal force from bottom to top, the lubricating oil in the first section 141 cannot flow upward from the second section 142, but the lubricating oil flows into the first section 141 from the second section 142 easily along the direction of the gravity and the centrifugal force from top to bottom along the second section 142.

Further, an angle formed by the second section 142 and the central axis of the rotating shaft 1 in the vertical direction is an acute angle, and the acute angle is directed obliquely downward.

Further, an acute angle formed by the axis of the second section 142 and the axis of the first section 141 is 1 ° to 10 °.

Example 3

As shown in fig. 4, the present embodiment is different from embodiment 1 in that the first oil return groove 12 is disposed along the circumferential direction of the rotating shaft 1 in the present embodiment. In this embodiment, the lubricant oil needs to overcome the shearing force between the lubricant oil and the outer wall surface of the rotating shaft 1 when the lubricant oil returns to the first oil return groove 12. Since the shearing force is much greater than the gravity of the lubricating oil, in this embodiment, the length of the first oil return groove 12 may be shorter than the length of the first oil return groove 12 in

embodiments

1 and 2.

Further, the plane of the first oil return groove 12 is parallel to the plane of the end face of the crankshaft, that is, the first oil return groove 12 is horizontally arranged.

The end of the first oil return groove 12 connected to the first spiral groove 11 is an inlet end, the first oil return groove 12 further includes an outlet end, and the extending direction of the first oil return groove 12 from the inlet end to the outlet end is the same as the rotating direction of the rotating shaft 1, so that the shearing force needs to be overcome when the first oil return groove 12 returns oil, and oil return during low-speed rotation of the rotating shaft 1 is avoided.

Example 4

As shown in fig. 5, in the present embodiment, a second oil outlet 17 is formed in the outer peripheral wall of the rotating shaft 1, an oil passage is formed in the rotating shaft 1, a second oil return hole 15 is formed between the oil passage and the second oil outlet 17, and the oil passage is communicated with the second oil outlet 17 through the second oil return hole 15. Through setting up second oil gallery 15, can realize realizing the oil return in second oil outlet 17 department when pivot 1 is high-speed to rotate, avoid measuring big lubricating oil when pivot 1 is high-speed to be discharged, reduced the oil extraction volume, avoid equipment wearing and tearing, guarantee operational reliability.

Further, a second oil return hole 15 is formed between the second oil outlet hole 17 and the oil passage, and oil cannot return when the rotating shaft 1 rotates at a low speed due to the fact that centrifugal force is overcome in the oil return flowing direction of the lubricating oil and the second oil return hole 15 is formed. When the rotating shaft 1 rotates at a high speed, the second oil outlet 17 is filled with lubricating oil, the flow rate is high, the energy is high, and partial lubricating oil flows back through the second oil return hole 15.

Further, the second oil outlet 17 is arranged along the radial direction of the rotating shaft 1, the oil inlet end of the second oil outlet 17 is close to the outside, and the oil inlet end of the second oil outlet 17 is close to the inside.

Further, a section of the oil passage that meets the second oil outlet 17 is a part of the exhaust passage.

The oil return structure, the compressor and the air conditioner provided by the embodiment of the invention can enable part of lubricating oil to flow back when the rotating shaft 1 rotates at a high speed, reduce the oil discharge amount, avoid equipment abrasion and ensure the operation reliability.

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 an oil return structure, its characterized in that communicates with each other with fluid passageway including setting up first oil return passageway on pivot (1), still be provided with the oil extraction passageway on pivot (1), the entry end of first oil return passageway with the oil extraction passageway is linked together, the exit end of first oil return passageway with the fluid passageway communicates with each other.

2. The oil return structure according to claim 1, wherein the first oil return channel further includes a first oil return groove (12), the first oil return groove (12) is provided on the outer peripheral wall of the rotating shaft (1), the oil discharge channel includes a first spiral groove (11), the first spiral groove (11) is provided on the outer peripheral wall of the rotating shaft (1), the first oil return groove (12) is connected to the first spiral groove (11), and oil in the first spiral groove (11) can flow into the first oil return groove (12).

3. The oil return structure according to claim 2, characterized in that the first oil return groove (12) is provided in the axial direction of the rotating shaft (1).

4. The oil return structure according to claim 2, characterized in that the first oil return groove (12) is provided along a circumferential direction of the rotating shaft (1).

5. The oil return structure according to claim 4, wherein an end of the first oil return groove (12) connected to the first spiral groove (11) is an inlet end, the first oil return groove (12) further comprises an outlet end, and an extending direction of the first oil return groove (12) from the inlet end to the outlet end is the same as a rotating direction of the rotating shaft (1).

6. The oil return structure according to claim 2, characterized in that the groove depth of the first oil return groove (12) decreases in the direction of flow of oil in the first oil return groove (12).

7. The oil return structure according to claim 2, wherein the first oil return passage further includes a first oil return hole (13), the first oil return hole (13) is opened in the rotating shaft (1), the first oil return hole (13) is connected to the first oil return groove (12), and the oil in the first oil return groove (12) flows into the oil passage through the first oil return hole (13).

8. The oil return structure according to claim 1, characterized in that the first oil return hole (13) is provided in a radial direction of the rotating shaft (1).

9. The oil return structure according to claim 7, wherein the oil passage includes a first section (141) and a second section (142), the first section (141) is contiguous with the first helical groove (11), oil in the first section (141) can flow into the first helical groove (11), the second section (142) is contiguous with the first oil return hole (13), and oil in the first oil return hole (13) can flow into the second section (142).

10. The oil return structure according to claim 9, characterized in that the first section (141) and the second section (142) are arranged along the axis of the rotating shaft (1).

11. The oil return structure according to claim 10, characterized in that the diameter of the second section (142) is d, 2mm ≦ d ≦ 6 mm.

12. The oil return structure according to claim 9, characterized in that the second section (142) is at an increasing distance from the axis of the rotating shaft (1) in a direction approaching the first section (141).

13. The oil return structure according to claim 12, characterized in that the acute angle formed by the axis of the second section (142) and the axis of the first section (141) is 1 ° to 10 °.

14. The oil return structure according to claim 2, wherein a first oil outlet hole (16) is formed in the rotating shaft (1), and the oil passage communicates with the first spiral groove (11) through the first oil outlet hole (16).

15. The oil return structure according to claim 1, wherein a second oil outlet (17) is provided on the peripheral wall of the rotating shaft (1), the oil passage is provided in the rotating shaft (1), a second oil return hole (15) is provided between the oil passage and the second oil outlet (17), and the oil passage and the second oil outlet (17) are communicated through the second oil return hole (15).

16. The oil return structure according to claim 15, characterized in that the second oil return hole (15) is provided in a radial direction of the rotating shaft (1).

17. A compressor, characterized by comprising the oil return structure according to any one of claims 1 to 16.

18. A refrigerator, characterized by comprising the oil return structure according to any one of claims 1 to 16.