WO2021051697A1

WO2021051697A1 - Screw compressor and air conditioning unit

Info

Publication number: WO2021051697A1
Application number: PCT/CN2019/127802
Authority: WO
Inventors: 刘华; 张治平; 武晓昆; 龙忠铿; 李日华; 毕雨时
Original assignee: 珠海格力电器股份有限公司
Priority date: 2019-09-18
Filing date: 2019-12-24
Publication date: 2021-03-25
Also published as: CN110486277A

Abstract

A screw compressor and an air conditioning unit. The screw compressor comprises a housing (10), and a male rotor (20) and a female rotor (30) disposed in the housing (10). The male rotor (20) and the female rotor (30) are arranged in the vertical direction, and the center of rotation of the male rotor (20) and the center of rotation of the female rotor (30) are located on a vertical line in which the center of gravity of the housing (10) is located. The screw compressor avoids the problem of eccentric vibrations caused by the centers of rotation of the male rotor (20) and the female rotor (30) deviating from the vertical line in which the center of gravity of the housing (10) is located, thereby reducing vibrations of the compressor, and ensuring the stability of the compressor in operation.

Description

Screw compressor and air conditioning unit

Cross-references to related applications

This disclosure is based on a Chinese application with an application number of 201910882629.6 and a filing date of September 18, 2019, and claims its priority. The disclosure of the Chinese application is hereby incorporated into this disclosure as a whole.

Technical field

The present disclosure relates to the technical field of refrigeration equipment, and in particular to a screw compressor and an air conditioning unit.

Background technique

The screw compressor is a positive displacement refrigeration compressor. It uses a pair of intermeshing female and male rotors to rotate in the body cavity, periodically changing the volume between each pair of teeth of the rotor to complete suction, compression, and discharge. process.

As shown in Figure 1, a pair of female and male rotors arranged in a horizontal direction are arranged on the compressor housing 1. The motor is usually installed on the male rotor and directly drives the male rotor without other transmission structures such as couplings. The structure is simple. The female rotor is driven to rotate by the male rotor.

In addition, as shown in FIG. 1, the compressor housing 1 is also provided with a capacity adjustment slide valve 2. The capacity adjustment slide valve 2 is a common structure used to adjust the volume flow in screw compressors. It is assembled on the compressor housing and becomes a part of the compressor housing. It is located at the intersection of the rotor cavity and can be positioned parallel to the cylinder axis. Move back and forth in the direction. When the capacity adjustment spool valve 2 moves, a bypass hole 3 is formed on the casing to bypass excess gas, and the effective compression length of the rotor is shortened, thereby changing the compressor suction flow and achieving the purpose of adjusting the compressor load. . Since the female rotor and the male rotor are arranged horizontally, the capacity regulating spool valve 2 is arranged on the intersection of the rotor cavity holes. Therefore, the capacity regulating spool valve 2 is located at the top of the rotor or the bottom of the rotor.

Summary of the invention

Related Art Embodiments of the present disclosure provide a screw compressor including a housing and a male rotor and a female rotor arranged in the housing, the male rotor and the female rotor are arranged in a vertical direction, and the rotation centers of the male rotor and the female rotor are located The vertical line where the center of gravity of the shell is located.

In some embodiments, the male rotor is located below the female rotor.

In some embodiments, the male rotor is located above the female rotor.

In some embodiments, the screw compressor includes a motor, and the motor is drivingly connected with the male rotor.

In some embodiments, the motor is provided on the anode rotor.

In some embodiments, the screw compressor includes a spool valve, and the spool valve is disposed at the male rotor and the female rotor.

In some embodiments, the slide valve is arranged on the left or right side of the male rotor and the female rotor.

In some embodiments, the male rotor and the female rotor are symmetrically arranged about their respective centers of rotation.

In some embodiments, the screw compressor is a semi-hermetic screw compressor.

The present disclosure also provides an air conditioning unit, including a screw compressor, the screw compressor being the above-mentioned screw compressor.

In the above embodiment, since the male rotor and the female rotor are arranged in a vertical direction, and the rotation centers of the male and female rotors are located on the vertical line where the center of gravity of the housing is located, it is convenient to make the rotation centers of the male and female rotors Located on the vertical line where the center of gravity of the screw compressor is located, to avoid eccentric vibration caused by the deviation of the rotation center of the male and female rotors from the vertical line where the center of gravity of the screw compressor is located, thereby reducing the vibration of the compressor , Improve the stability of the compressor operation process.

Description of the drawings

The drawings constituting a part of the present disclosure are used to provide a further understanding of the present disclosure, and the exemplary embodiments and descriptions of the present disclosure are used to explain the present disclosure, and do not constitute an improper limitation of the present disclosure. In the attached picture:

Fig. 1 is a schematic diagram of the structure of a capacity adjustment spool valve in the related art;

Figure 2 is a schematic structural diagram of a compressor according to the related art;

Fig. 3 is a schematic structural diagram of another compressor according to the related art;

Fig. 4 is a schematic structural diagram of an embodiment of a compressor according to the present disclosure.

detailed description

In order to make the objectives, technical solutions, and advantages of the present disclosure clearer, the following further describes the present disclosure in detail with reference to the embodiments and the accompanying drawings. Here, the exemplary embodiments of the present disclosure and the description thereof are used to explain the present disclosure, but are not intended to limit the present disclosure.

After further research on the screw compressor with the rotor in the horizontal direction in the related technology, it is found that, as shown in Figure 2, the male and female rotors are arranged horizontally, and the capacity adjustment slide valve 2 is arranged on the top of the male rotor 4 and the female rotor 5, resulting in The center of gravity C of the screw compressor is above the center line of the male rotor 4, and the position of the center of gravity C between the male rotor 4 and the female rotor 5 is deviated from the rotation center of the male rotor 4. As shown in Figure 3, the male and female rotors are arranged horizontally, and the capacity adjustment slide valve 2 is located at the bottom of the male rotor 4 and the female rotor 5, resulting in the screw compressor's center of gravity C deviating from the rotation center of the male rotor 4.

It can be seen that when the male rotor 4 and the female rotor 5 are arranged horizontally, the center of gravity C of the screw compressor and the center of rotation of the male rotor 4 are not collinear in the vertical direction, and the center of rotation of the male rotor 4 and the center of gravity C of the screw compressor are located The deviation distance of the vertical line is large, which easily aggravates the vibration of the screw compressor.

In addition, as shown in Figure 3, when the capacity adjustment spool valve 2 is located at the bottom of the male rotor 4 and the female rotor 5, it can be clearly seen from Figure 3 that the capacity adjustment spool valve 2 is at the bottom of the compressor housing 1. , And the diameter of the capacity adjustment spool valve 2 cannot be made small, generally approximately equal to the rotor radius. Therefore, the diameter of the capacity adjustment spool valve 2 occupies a part of the space at the bottom, and the rotation center of the male rotor 4 and the female rotor 5 will be raised. A capacity adjustment slide valve 2 diameter distance, and because the rotation center of the male rotor 4 is raised, the motor connected to the male rotor 4 will also be raised, and the entire male rotor 4 shaft system of the compressor will be raised. Therefore, finally It will cause the center of gravity C of the screw compressor to be raised, and the higher the center of gravity C, the more unstable the operation of the screw compressor, and because the center of rotation of the compressor is also raised, the instability of the compressor rotation will also increase. , The compressor is prone to excessive vibration during operation.

In order to solve the above technical problems, in the technical solution of the present disclosure, as shown in FIG. 4, a screw compressor is provided. The screw compressor includes a housing 10 and a male rotor 20 and a female rotor arranged in the housing 10. 30. The male rotor 20 and the female rotor 30 are arranged in a vertical direction, and the rotation centers of the male rotor 20 and the female rotor 30 are located on the vertical line where the center of gravity of the housing 10 is located.

In applying the technical solution of the present disclosure, since the male rotor 20 and the female rotor 30 are arranged in a vertical direction, and the rotation centers of the male rotor 20 and the female rotor 30 are located on the vertical line where the center of gravity of the housing 10 is located, it is convenient to use The rotation centers of the male rotor 20 and the female rotor 30 are located on the vertical line where the center of gravity C of the screw compressor is located, so as to avoid the rotation center of the male rotor 20 and the female rotor 30 deviating from the vertical line where the center of gravity C of the screw compressor is located. The eccentric vibration reduces the vibration of the compressor and improves the stability of the screw compressor operation process.

As shown in FIG. 4, in some embodiments, the male rotor 20 is located below the female rotor 30. In other embodiments, the male rotor 20 is also located above the female rotor 30. Wherein, when the male rotor 20 is located below the female rotor 30, the male rotor 20 is arranged at a lower position, which is convenient for reducing the height of the center of gravity of the screw compressor and improving the running stability of the screw compressor.

In some embodiments, the screw compressor includes a motor, and the motor is drivingly connected to the male rotor 20. Specifically, the motor is installed on the male rotor 20 to omit intermediate transmission structures such as couplings and simplify the structure. Moreover, when the male rotor 20 is located below the female rotor 30, the center of the male rotor 20 is lower, and the motor connected to the male rotor 20 will also be arranged at a lower position, and the entire male rotor shaft system of the compressor will be arranged at The lower position, so that the center of gravity C of the screw compressor is lowered, thereby improving the vibration problem during the operation of the compressor, and improving the running stability of the screw compressor.

In some embodiments, the screw compressor includes a capacity adjustment spool valve 40, and the capacity adjustment spool valve 40 is disposed at the male rotor 20 and the female rotor 30. In addition, since the male rotor 20 and the female rotor 30 are symmetrically arranged about their respective rotation centers, the center of gravity of the housing 10 is on the vertical line where the rotation centers of the male rotor 20 and the female rotor 30 are located, so even if the capacity adjustment is set The position of the center of gravity of the spool valve 40 and the screw compressor is also close to the rotation center of the male rotor 20.

In some embodiments, as shown in FIG. 4, the capacity adjustment slide valve 40 is provided on the left side of the male rotor 20 and the female rotor 30. As some other embodiments not shown in the figure, the capacity adjusting slide valve 40 is arranged on the right side of the male rotor 20 and the female rotor 30.

It should be noted that the technical solution of the present disclosure is particularly suitable for semi-hermetic screw compressors.

The compressor technology of the present disclosure changes the conventional horizontal arrangement of male and female rotors. The male and

female rotors

20 and 30 are arranged in the vertical direction, and the female rotor 30 is arranged on the male rotor 20, and the capacity adjustment slide valve 40 is arranged on The side of the male and female rotors make the center of gravity of the compressor close to the center of rotation of the male rotor 20, and because the capacity adjustment slide valve 40 is arranged on the side of the rotor, the rotation centers of the male and

female rotors

20 and 30 will not be increased. Therefore, the compressor can be lowered. Center of gravity. The lower the center of gravity of the compressor, the closer the center of gravity to the center of rotation of the male rotor 20, the smaller the vibration of the compressor, and the more stable the operation, which is beneficial to solving the current technical problem of large vibration during the operation of the screw compressor.

The present disclosure also provides an air conditioning unit, which includes the above-mentioned screw compressor. The use of the above-mentioned screw compressor can make the operation noise of the air-conditioning unit lower and the operation more stable.

The foregoing descriptions are only preferred embodiments of the present disclosure, and are not intended to limit the present disclosure. For those skilled in the art, the embodiments of the present disclosure may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

A screw compressor includes:

Shell (10);

The male rotor (20) is arranged in the housing (10); and

The female rotor (30) is arranged in the housing (10);

Wherein, the male rotor (20) and the female rotor (30) are arranged in a vertical direction, and the rotation centers of the male rotor (20) and the female rotor (30) are located in the housing (10) The vertical line where the center of gravity is located.
The screw compressor according to claim 1, wherein the male rotor (20) is located below the female rotor (30).
The screw compressor according to claim 1, wherein the male rotor (20) is located above the female rotor (30).
The screw compressor according to claim 1, further comprising a motor, and the motor is drivingly connected with the male rotor (20).
The screw compressor according to claim 4, wherein the motor is mounted on the male rotor (20).
The screw compressor according to claim 1, further comprising a capacity adjustment spool valve (40), the capacity adjustment spool valve (40) being arranged at the male rotor (20) and the female rotor (30).
The screw compressor according to claim 6, wherein the capacity adjusting slide valve (40) is arranged on the left or right of the male rotor (20) and the female rotor (30).
The screw compressor according to claim 1, wherein the male rotor (20) and the female rotor (30) are symmetrically arranged with respect to respective rotation centers.
The screw compressor according to any one of claims 1 to 8, wherein the screw compressor is a semi-hermetic screw compressor.
An air conditioning unit comprising a screw compressor, wherein the screw compressor is the screw compressor according to any one of claims 1 to 9.