Screw compressor and refrigeration system

Abstract

The present disclosure relates to a screw compressor and a refrigeration system, wherein the screw compressor comprises a body (1) comprising a first slot body (11) extending along a preset direction (x), a slide valve limiting component (2) comprising a supporting piece (21) connected to the body (1) and a limiting piece (22) extending along the preset direction (x) and comprising a first part (221) and a second part (222), the first part (221) extending out of the supporting piece (21) and being located in the first slot body (11), and the second part (222) being arranged on the supporting piece (21), and a slide valve (3) movably connected to the limiting piece (22) along the preset direction (x).

Description

Technical Field

[0001] This disclosure relates to the field of compressor technology, and more particularly to a screw compressor and refrigeration system. Background Technology

[0002] During the operation of a screw compressor, the slide valve moves according to the compressor pressure ratio (the ratio of discharge pressure to suction pressure). However, after the slide valve is relatively displaced between itself and the slide valve support plate, a pressure difference will be generated between the upper and lower surfaces of the slide valve. This pressure difference will exert an upward lift force on the slide valve, causing the gap between the slide valve and the slide valve support plate to widen. This may cause scratches on the surface of the compressor slide valve, seriously affecting the normal operation of the compressor. Summary of the Invention

[0003] The embodiments of this disclosure provide a screw compressor and refrigeration system that can improve the stability of the slide valve.

[0004] According to one aspect of this disclosure, a screw compressor is provided, comprising:

[0005] The body includes a first groove extending in a preset direction;

[0006] A slide valve limiting assembly includes a support member and a limiting member. The support member is connected to the machine body, and the limiting member extends along a preset direction and includes a first part and a second part. The first part extends out of the support member and is located in a first groove, and the second part is disposed on the support member.

[0007] The slide valve is movably connected to the limiting element in a preset direction.

[0008] In some embodiments, the limiting member and the supporting member are integrally formed.

[0009] In some embodiments, the support member further includes a second groove extending in a preset direction, with a second portion disposed within the second groove.

[0010] In some embodiments, the end face of the support member away from the machine body and the end face of the second groove away from the machine body are spaced apart.

[0011] In some embodiments, the first and / or second portions of the limiting member include a guide portion, and the shapes of the first and / or second grooves match the guide portion.

[0012] In some embodiments, the guide portion includes a wedge-shaped portion, and the shape of the first groove and / or the second groove matches the wedge-shaped portion.

[0013] In some embodiments, the narrow end face of the wedge abuts against the bottom surface of the first groove and / or the second groove.

[0014] In some embodiments, the limiting member is tightly fitted with the first groove and / or the second groove.

[0015] In some embodiments, the length of the second portion along a predetermined direction is configured to provide support for the slide valve throughout its maximum stroke range.

[0016] In some embodiments, the support is detachable from the machine body, and multiple slide valve limiting assemblies are provided. The limiting member of each slide valve limiting assembly has a different length along a preset direction. The screw compressor can selectively install slide valve limiting assemblies adapted to the slide valve.

[0017] According to another aspect of this disclosure, a refrigeration system is proposed, including the screw compressor of the above embodiments.

[0018] Based on the above technical solution, the screw compressor of this embodiment can increase the length of the limiting member along a preset direction by setting a second part of the limiting member on the support member, thereby reducing the lower gap of the slide valve, reducing the air pressure difference in the height direction of the slide valve, effectively curbing the vertical displacement of the slide valve, improving the stability of the slide valve, and improving the stability and reliability of the compressor operation; at the same time, the increase in the length of the limiting member can also increase the friction between the limiting member and the slide valve, improving the limiting effect of the limiting member on the slide valve; the increase in the length of the limiting member can also cooperate with the slide valve to strengthen the sealing performance and reduce the air leakage loss of the compressor. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of this disclosure and form part of this application, illustrate exemplary embodiments of this disclosure and are used to explain this disclosure, but do not constitute an undue limitation of this disclosure. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of some embodiments of the screw compressor disclosed herein.

[0021] Figure 2 This is a cross-sectional view of some embodiments of the screw compressor disclosed herein.

[0022] Figure 3 for Figure 2 A partially enlarged schematic diagram.

[0023] Figure 4 This is a schematic diagram of the structure of some embodiments of the support component of the screw compressor disclosed herein.

[0024] Figure 5 This is a schematic diagram of the structure of some embodiments of the limiting component of the screw compressor disclosed herein.

[0025] Explanation of reference numerals in the attached figures

[0026] 1. Body; 2. Slide valve limiting assembly; 3. Slide valve; 11. First groove; 21. Support; 212. Second groove; 22. Limiting component; 221. First part; 222. Second part; 223. Guide part. Detailed Implementation

[0027] The present disclosure is described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. The aspects so defined may be combined with any other aspect or aspects unless expressly stated otherwise. In particular, any feature considered preferred or advantageous may be combined with one or more other features considered preferred or advantageous.

[0028] The terms "first" and "second" used in this disclosure are merely for ease of description and to distinguish different components with the same name, and do not indicate a sequential or primary / secondary relationship.

[0029] In the description of this disclosure, it should be understood that the terms “inner,” “outer,” “upper,” and “lower,” etc., which indicate orientation or positional relationship, are defined based on the body, slide valve, support, or limiting element, etc., and are only for the convenience of describing this disclosure, and are not intended to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this disclosure.

[0030] During the research process, the inventors discovered that if the slide valve 3 is only supported by the support plate and other supporting components 21, although the support plate can play a limiting role, the contact between the slide valve and the slide valve support plate is insufficient, or in other words, there is a huge gap between the slide valve and the slide valve support plate. The air pressure difference between the upper and lower surfaces of the slide valve is still very large, which causes the slide valve to be subjected to lift force and the slide valve to have poor stability.

[0031] To address the aforementioned problems, this disclosure provides a screw compressor, such as... Figures 1 to 5 As shown, it includes:

[0032] The body 1 includes a first groove 11 extending along a preset direction x;

[0033] The slide valve limiting assembly 2 includes a support member 21 and a limiting member 22. The support member 21 is connected to the body 1, and the limiting member 22 extends along a preset direction x and includes a first part 221 and a second part 222. The first part 221 extends out of the support member 21 and is located in the first groove 11, and the second part 222 is disposed on the support member 21.

[0034] The slide valve 3 is movably connected to the limiting member 22 along a preset direction x.

[0035] Specifically, the preset direction x can be the axial direction of the screw compressor. Specifically, the top surface of the limiting member 22 protrudes from the surface of the machine body 1 where the limiting member 22 is located, and the top surface of the limiting member 22 protrudes from the surface of the support member 21 where the limiting member 22 is located. The surface of the support member 21 facing the slide valve 3 can be arc-shaped. Specifically, a keyway is provided on the bottom surface of the slide valve 3 for cooperating with the limiting member 22, so as to achieve movable connection to the limiting member 22 along the preset direction x. Specifically, the support member 21 can support the movement of the slide valve 3. Optionally, the support member 21 can be a slide valve support plate, etc., and the limiting member 22 can be a slide valve limiting key, etc.

[0036] Specifically, the first part 221 of the limiting member 22 is connected to the second part 222. Optionally, the limiting member 22 can be integrally formed with the support member 21, or the two can be set separately. In the case where the two are set separately, the support member 21 can be provided with a groove communicating with the first groove 11. Optionally, the support member 21 is detachably connected to the body 1.

[0037] Specifically, the length of the slide valve 3 is determined according to the compressor pressure ratio, which in turn determines the range of movement of the slide valve 3. The lengths of the limiting member 22 and the supporting member 21 along the preset direction x can be set according to the limit position of the slide valve 3 displacement. For example, the length of the limiting member 22 is equal to the distance between the leftmost end and the rightmost end that the slide valve 3 can reach.

[0038] Specifically, because the second part 222 of the limiting member 22 is located on the support member 21, and the first part 221 is located in the first groove 11, it can increase the length of the limiting member 22 along the preset direction x, blocking the huge gap between the keyway below the slide valve 3 and the support member 21 when the slide valve 3 moves. This reduces the gap at the bottom of the slide valve 3 when the slide valve 3 is displaced, reduces the pressure difference between the upper and lower parts of the slide valve, and reduces the upward force exerted by the pressure difference on the slide valve 3, thereby preventing the gap between the slide valve 3 and the support member 21 from widening and preventing scratches on the surface of the compressor slide valve. Specifically, the pressure difference exists continuously during the operation of the compressor.

[0039] Specifically, increasing the length of the limiting member 22 along the preset direction increases the contact area between the limiting member 22 and the lower surface of the slide valve 3, isolating the lower surface of the slide valve 3 from the outside world, effectively reducing the pressure difference between the upper and lower parts of the slide valve, and stabilizing the slide valve 3. At the same time, it increases the friction between the limiting member 22 and the slide valve 3, allowing the movement of the slide valve 3 in the up and down direction to be controlled, preventing abnormal operation of the compressor due to the up and down movement of the slide valve 3, and improving the reliability of the slide valve 3. Lengthening the limiting member and the slide valve support plate can also reduce the contact between the lower surface of the slide valve 3 and the outside world, improving the sealing performance of the slide valve 3 and the airtightness of the compressor.

[0040] This embodiment, by setting a second part of the limiting member on the support member, can increase the length of the limiting member along a preset direction, reduce the lower gap of the slide valve, reduce the air pressure difference in the height direction of the slide valve, effectively curb the vertical displacement of the slide valve, improve the stability of the slide valve, and improve the stability and reliability of the compressor operation; at the same time, the increase in the length of the limiting member can also increase the friction between the limiting member and the slide valve, and improve the limiting effect of the limiting member on the slide valve; the increase in the length of the limiting member can also cooperate with the slide valve to strengthen the sealing performance and reduce the air leakage loss of the compressor.

[0041] In some embodiments, the limiting member 22 and the supporting member 21 are integrally formed.

[0042] This embodiment integrates the limiting component and the supporting component, making the compressor structure compact and reliable. It reduces the number of parts, improves the stability of the slide valve, and facilitates production.

[0043] In some embodiments, such as Figure 4 As shown, the support member 21 also includes a second groove 212 extending along a preset direction x, and a second part 222 is disposed in the second groove 212.

[0044] Specifically, when the support member 21 is connected to the body 1, the first groove 11 and the second groove 212 are connected along a preset direction x, and the limiting member 22 is installed in both the first groove 11 and the second groove 212. Specifically, the second part 222 of the limiting member 22 is installed in the second groove 212 of the support member 21, so that the support member 21 and the body 1 cooperate to firmly fix the limiting member 22, thereby improving the stability of the limiting member 22. The limiting member 22 then cooperates with the keyway on the bottom surface of the slide valve 3, thereby improving the stability of the slide valve 3.

[0045] This embodiment, by setting a second groove in the support component, can cooperate with the first groove in the machine body to fix the limiting component, thereby improving the stability of the limiting component and the stability of the slide valve; at the same time, it also facilitates improvements based on the existing support component, thereby reducing production costs.

[0046] In some embodiments, such as Figure 4 As shown, the end face of the support member 21 away from the body 1 is spaced apart from the end face of the second groove 212 away from the body 1.

[0047] This embodiment achieves stable positioning of the limiting component by spacing the end face of the support member with the end face of the second groove, thereby further improving the stability of the limiting component.

[0048] In some embodiments, such as Figure 5 As shown, the first part 221 and / or the second part 222 of the limiting member 22 includes a guide portion 223, and the shape of the first groove 11 and / or the second groove 212 matches the guide portion 223.

[0049] Specifically, the guide portion 223 is located at the bottom of the limiting member 22, and can be a tapered structure relative to the top of the limiting member 22, which facilitates assembly while providing reliable limiting of the movement of the slide valve 3 at the top of the limiting member 22. Optionally, the shape of the guide portion 223 can be adjusted according to actual conditions, such as a wedge shape or other suitable tapered shape.

[0050] This embodiment improves the assembly efficiency of the compressor by providing a guide portion to the limiting member, which facilitates the installation of the limiting member into the first and / or second slots.

[0051] In some embodiments, such as Figure 5 As shown, the guide portion 223 includes a wedge-shaped portion, and the shapes of the first groove 11 and / or the second groove 212 match the wedge-shaped portion.

[0052] Specifically, the wedge-shaped portion includes a gradually tapering slope, which can provide smoother guidance for the installation of the limiting member, that is, the limiting member can be installed quickly and accurately without the guide portion being precisely aligned with the matching part of the first groove 11 and / or the second groove 212.

[0053] This embodiment, by including a wedge-shaped portion in the guide section, can improve the installation speed of the limiting component while increasing the installation accuracy, thereby further improving the stability of the slide valve.

[0054] In some embodiments, the narrow end face of the wedge-shaped portion abuts against the bottom surface of the first groove 11 and / or the second groove 212. Specifically, the narrow end face of the wedge-shaped portion is located at the bottom of the wedge-shaped portion.

[0055] This embodiment uses the narrow end face of the wedge-shaped portion to abut against the first groove and / or the second groove, which increases the resistance to the wobbling of the limiting member through more surface contact, improves the stability of the limiting member, and thus improves the stability of the slide valve.

[0056] In some embodiments, the limiting member 22 is tightly fitted with the first groove 11 and / or the second groove 212.

[0057] This embodiment uses a limiting member that fits tightly with the first groove and / or the second groove, so that the first groove and / or the second groove can firmly fix the limiting member, thereby improving the stability of the limiting member and the stability of the slide valve moving in the preset direction.

[0058] In some embodiments, the length of the second portion 222 along a predetermined direction x is configured to provide support for the slide valve 3 within the maximum stroke range of the slide valve 3.

[0059] This embodiment provides constant support to the slide valve through the second part, which ensures the minimum length of the limiting member along the preset direction, reduces the gap between the lower part of the slide valve and the support member, improves the stability of the slide valve, and improves the stability and reliability of the compressor operation.

[0060] In some embodiments, the support member 21 is detachable from the body 1, and multiple slide valve limiting components 2 are provided. The limiting member 22 of each slide valve limiting component 2 has a different length along a preset direction x. The screw compressor can selectively install slide valve limiting components 2 adapted to slide valve 3.

[0061] Specifically, the length of the limiting member 22 and the length of the supporting member 21 are adapted to the length of the slide valve 3, and the length of the slide valve 3 depends on the compressor pressure ratio. Specifically, by selectively installing the slide valve limiting assembly 2, the slide valve limiting assembly 2 can be adapted according to the compressor pressure ratio operating conditions, thereby improving the stability, reliability and multi-condition adaptability of the compressor.

[0062] This embodiment, by selectively installing a slide valve limiting component adapted to the slide valve, enables the length of the limiting component and the support component to match the length of the slide valve, ensuring the length of the limiting component and the support component, improving the stability of the slide valve, enhancing the limiting effect of the limiting component on the slide valve, and improving the airtightness and stability of the compressor.

[0063] Secondly, this disclosure also provides a refrigeration system, including the screw compressor of the above embodiments.

[0064] The screw compressor in this embodiment has high operational stability and reliability, good airtightness, and can improve the stability and refrigeration efficiency of the refrigeration system.

[0065] The screw compressor and refrigeration system provided in this disclosure have been described in detail above. Specific embodiments have been used to illustrate the principles and implementation methods of this disclosure. These embodiments are merely illustrative and are intended to help understand the method and core ideas of this disclosure. It should be noted that those skilled in the art can make various improvements and modifications to this disclosure without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of this disclosure.

Claims

1. A screw compressor, characterized in that, include: The body (1) includes a first groove (11) extending along a preset direction (x); The slide valve limiting assembly (2) includes a support (21) and a limiting member (22). The support (21) is connected to the body (1). The limiting member (22) extends along the preset direction (x) and includes a first part (221) and a second part (222). The first part (221) extends out of the support (21) and is located within the first groove (11). The second part (222) is disposed on the support (21). The length of the second part (222) along the preset direction (x) is configured to provide support for the slide valve (3) within its maximum stroke range. The slide valve (3) is movably connected to the limiting member (22) along the preset direction (x).

2. The screw compressor according to claim 1, characterized in that, The limiting member (22) and the supporting member (21) are integrally formed.

3. The screw compressor according to claim 1, characterized in that, The support member (21) further includes a second groove (212) extending along the preset direction (x), and the second part (222) is disposed in the second groove (212).

4. The screw compressor according to claim 3, characterized in that, The end face of the support member (21) away from the body (1) is spaced apart from the end face of the second groove (212) away from the body (1).

5. The screw compressor according to claim 3, characterized in that, The first portion (221) and / or the second portion (222) of the limiting member (22) includes a guide portion (223), and the shape of the first groove (11) and / or the second groove (212) matches the guide portion (223).

6. The screw compressor according to claim 5, characterized in that, The guide portion (223) includes a wedge-shaped portion, and the shape of the first groove (11) and / or the second groove (212) matches the wedge-shaped portion.

7. The screw compressor according to claim 6, characterized in that, The narrow end face of the wedge-shaped portion abuts against the bottom surface of the first groove (11) and / or the second groove (212).

8. The screw compressor according to claim 3, characterized in that, The limiting member (22) is tightly fitted with the first groove (11) and / or the second groove (212).

9. The screw compressor according to any one of claims 1 to 8, characterized in that, The support (21) is detachable relative to the body (1). Multiple slide valve limiting components (2) are provided. The length of the limiting component (22) of each slide valve limiting component (2) along the preset direction (x) is different. The screw compressor can selectively install the slide valve limiting component (2) that is compatible with the slide valve (3).

10. A refrigeration system, characterized in that, Includes the screw compressor as described in any one of claims 1 to 9.

Images