CN110836181A - Screw compressors and air conditioning units - Google Patents

Abstract

The application provides a screw compressor and an air conditioning unit. The screw compressor includes a casing, male and female rotors, and a slide valve. The male rotor and the female rotor are arranged in the casing, and the male rotor and the female rotor are arranged in the vertical direction, the sliding valve is arranged on the side of the male rotor and the female rotor, and the bottom of the sliding valve is mounted on the casing through the first connecting piece. By applying the technical solution of the present invention, the bottom of the slide valve is installed on the housing through the first connecting piece, and the self-weight of the slide valve can fall on the first connecting piece more reasonably, so that the whole of the first connecting piece is stressed, avoiding the The first connecting piece and the positioning surface of the casing are worn due to local force, which ensures the service life of the screw compressor.

Description

Screw compressors and air conditioning units

technical field

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

Background technique

Screw units are widely used in central air conditioners because of their high efficiency, high reliability, few assembly parts, and easy maintenance. Screw compressors belong to positive displacement refrigeration compressors. They use a pair of intermeshing female and male rotors to make rotary motion in the body cavity, and periodically change the volume between each pair of rotor slots to complete suction, compression and exhaust. process.

In the actual work of screw compressors, due to changes in the climate environment and application scenarios, the compressors are required to work more efficiently under different working conditions. For example, the evaporating temperature or condensing temperature of the unit will change due to the actual working conditions, so the compressor is required to work under different volume ratio conditions; or when the unit works under low load conditions, the compressor is required to be able to adjust the capacity to make it work in Work under partial load conditions. Both of the above-mentioned requirements can be fulfilled by the spool valve structure.

The slide valve of the existing semi-hermetic twin-screw compressor is generally arranged up or down. As shown in FIG. 1 , the slide valve 1 is installed under the male rotor 3 and the female rotor 4 through the key 2 . During the axial movement, the sliding valve 1 is guided by the outer arc surface of the sliding valve 1, and its rotational movement is restricted by the cooperation of the key 2 and the groove. In a subsequent compressor design scheme for lowering the center of gravity, as shown in FIG. 2 , a longitudinal arrangement structure with the male rotor 3 on the bottom and the female rotor 4 on the top is adopted, and the slide valve 1 is arranged laterally. The installation method of the slide valve 1 continues to be installed through a key 2, but due to the gravity of the slide valve 1, most of the gravity of the slide valve 1 will act on the lower side of the key 2, which is close to the a part of the slide valve 1. The back and forth movement between the key 2 and the groove for a long time causes the a part to be easily worn. When the wear is severe, the spool valve 1 will be in contact with the rotor due to the circumferential movement, resulting in scratches and damage to the screw compressor.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a screw compressor and an air conditioning unit to solve the technical problem of damage to the screw compressor caused by the easy abrasion of keys caused by the lateral arrangement of the slide valve in the screw compressor in the prior art.

Embodiments of the present application provide a screw compressor, comprising: a casing; a male rotor and a female rotor, which are arranged in the casing, and the male rotor and the female rotor are arranged in a vertical direction, and a slide valve, which is arranged in the male rotor and the female rotor side, and the bottom of the slide valve is mounted on the housing through the first connecting piece.

In one embodiment, the top of the slide valve is also mounted on the housing through a second connecting piece.

In one embodiment, the first connector and/or the second connector are keys.

In one embodiment, the slide valve is provided on the left or right side of the male rotor and the female rotor.

In one embodiment, the male and female rotors are located in a vertical direction where the center of gravity of the housing is located.

In one embodiment, a channel for installing a slide valve is formed on the housing, and the slide valve is located in the channel.

In one embodiment, the male rotor is located below the female rotor.

In one embodiment, the male rotor is positioned above the female rotor.

In one embodiment, the screw compressor includes an electric motor in driving connection with the male rotor.

The present application also provides an air-conditioning unit, including a screw compressor, and the screw compressor is the above-mentioned screw compressor.

In the above embodiment, the bottom of the spool valve is installed on the housing through the first connecting piece, and the self-weight of the spool valve can fall on the first connecting piece more reasonably, so that the entire first connecting piece is stressed, avoiding the The part between the connecting piece and the positioning surface of the casing is worn due to local force, which ensures the service life of the screw compressor.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present invention, and 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 attached image:

Fig. 1 is the structural representation according to a kind of screw compressor in the prior art;

Fig. 2 is the structural representation of another screw compressor according to the prior art;

3 is a schematic structural diagram of an embodiment of a screw compressor according to the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but not to limit the present invention.

In order to solve the technical problem of the screw compressors in the prior art, the keys are easily worn out due to the lateral arrangement of the spool valve, resulting in damage to the screw compressor. Between the bottom of the spool valve 40 and the housing 10, the self-weight of the spool valve 40 can reasonably fall on the first connecting piece 50, so that the entire first connecting piece 50 can be stressed, and the partial force of the first connecting piece 50 can be prevented from being easily worn. .

Specifically, as shown in FIG. 3 , the present invention provides a screw compressor, which includes a casing 10 , a male rotor 20 , a female rotor 30 , and a slide valve 40 . The male rotor 20 and the female rotor 30 are arranged in the housing 10, and the male rotor 20 and the female rotor 30 are arranged in the vertical direction, the slide valve 40 is arranged on the side of the male rotor 20 and the female rotor 30, and the bottom of the slide valve 40 passes through the A connector 50 is mounted on the housing 10 .

By applying the technical solution of the present invention, the bottom of the slide valve 40 is installed on the housing 10 through the first connecting piece 50, and the self-weight of the slide valve 40 can fall on the first connecting piece 50 more reasonably, so that the The overall force is applied to avoid abrasion due to local force between the first connecting piece 50 and the positioning surface of the casing 10, thereby ensuring the service life of the screw compressor.

As shown in FIG. 3 , as a more preferred embodiment, the top of the slide valve 40 is also mounted on the housing 10 through a second connecting member 60 . The simultaneous positioning of the two connecting pieces can limit the position of the slide valve 40 more stably, and more effectively prevent the circumferential movement of the slide valve 40 during the operation of the screw compressor. 40 The wear of the positioning surface caused by its own gravity.

Preferably, in the technical solution of this embodiment, the first connecting member 50 and the second connecting member 60 are keys, and the installation method of the keys is determined according to the sliding direction of the slide valve 40 . In addition to the keys, the first connecting member 50 and the second connecting member 60 may also be bumps integrally formed on the spool valve 40 .

Optionally, as shown in FIG. 3 , in the technical solution of this embodiment, a channel 11 for installing a slide valve 40 is formed on the housing 10 , and the slide valve 40 is located in the channel 11 . Specifically, during safe rotation, the bottom and top of the slide valve 40 are installed in cooperation with the inner wall of the channel 11 through the first connecting piece 50 and the second connecting piece 60 respectively.

It should be noted that, in the technical solution of the present invention, the first connecting member 50 and/or the second connecting member 60 may be integrally formed with the spool valve 40 , or may be installed on the spool valve 40 as separate parts.

As an optional embodiment, as shown in FIG. 3 , the slide valve 40 is arranged on the left side of the male rotor 20 and the female rotor 30 . As an optional embodiment not shown in the drawings, the slide valve 40 may also be provided on the right side of the male rotor 20 and the female rotor 30 .

As a more preferred embodiment, the male rotor 20 and the female rotor 30 are located in the vertical direction where the center of gravity of the casing 10 is located. Since the male rotor 20 and the female rotor 30 are arranged in the vertical direction, and the male rotor 20 and the female rotor 30 are located in the vertical direction where the center of gravity of the casing 10 is located, it is possible to make the rotation centers of the male rotor 20 and the female rotor 30 also Being located in the vertical direction where the center of gravity of the housing 10 is located, the eccentric vibration caused by the deviation of the rotation centers of the male rotor 20 and the female rotor 30 from the vertical direction where the center of gravity of the housing 10 is located is avoided, thereby reducing the compression The vibration of the compressor ensures the stability of the compressor during operation.

As shown in FIG. 3 , in the technical solution of this embodiment, the male rotor 20 is located below the female rotor 30 . Since the male rotor 20 is heavier than the female rotor 30, arranging the male rotor 20 below the female rotor 30 can lower the center of gravity of the rotating parts, further avoid eccentric vibration, thereby reducing the vibration of the compressor and ensuring the compressor stability during operation.

Optionally, the screw compressor includes a motor that is drivingly connected to the male rotor 20 . In the preferred embodiment of the present invention, the male rotor 20 is located below the female rotor 30, so that the center of the male rotor 20 can be arranged very low, and the motor connected to the male rotor 20 can also be arranged very low, and the entire compressor can be arranged very low. The male rotor shafting will be arranged very low, the center of gravity of the compressor can be lowered very low, and the center of gravity of the compressor can be lowered to improve the vibration problem during the operation of the compressor.

As another optional embodiment, the male rotor 20 can also be located above the female rotor 30, and this embodiment is slightly weaker in anti-vibration performance than the above-mentioned optimal embodiment.

The technical solution of the present invention can effectively avoid excessive wear of the keys and grooves, thereby avoiding the risk of failure of the circumferential positioning of the spool valve due to wear.

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

The present invention also provides an air-conditioning unit, comprising the above-mentioned screw compressor. Using the above-mentioned screw compressor can make the operation noise of the air-conditioning unit lower and the operation more stable.

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

Claims (10)

1. a screw compressor, is characterized in that, comprises: housing (10); A male rotor (20) and a female rotor (30) are provided in the housing (10), and the male rotor (20) and the female rotor (30) are arranged in a vertical direction, A sliding valve (40) is provided on the side surfaces of the male rotor (20) and the female rotor (30), and the bottom of the sliding valve (40) is mounted on the casing (40) through a first connecting piece (50). 10) on. 2 . The screw compressor according to claim 1 , wherein the top of the slide valve ( 40 ) is also mounted on the casing ( 10 ) through a second connecting piece ( 60 ). 3 . 3. The screw compressor according to claim 2, wherein the first connecting member (50) and/or the second connecting member (60) are keys. 4 . The screw compressor according to claim 1 , wherein the slide valve ( 40 ) is arranged on the left or right side of the male rotor ( 20 ) and the female rotor ( 30 ). 5 . 5. The screw compressor according to claim 1, wherein the male rotor (20) and the female rotor (30) are located in the vertical direction where the center of gravity of the casing (10) is located. 6. The screw compressor according to claim 1, characterized in that, a channel (11) for installing the slide valve (40) is formed on the casing (10), and the slide valve (40) located in the channel (11). 7. The screw compressor according to claim 1, wherein the male rotor (20) is located below the female rotor (30). 8. The screw compressor according to claim 1, wherein the male rotor (20) is located above the female rotor (30). 9. The screw compressor according to claim 1, characterized in that, the screw compressor comprises a motor, and the motor is drivingly connected with the male rotor (20). 10 . 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 . 11 .

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