Screw machine

Abstract

The utility model belongs to the technical field of compression equipment, and particularly relates to a screw machine which comprises a machine body, a compression cavity is arranged in the machine body, and an air inlet end and an air outlet end which are communicated with the compression cavity are arranged on two sides of the machine body. The screw rod is arranged in the compression cavity, and the two ends of the screw rod are rotationally connected with the machine body; the bearing pack is arranged at the end, close to the air outlet end, of the screw rod, and the bearing pack comprises two bearings which are distributed in parallel; the air bag pre-tightening piece is arranged at the end of the screw in a sleeving mode and located between the bearing pack and the machine body, and the air bag pre-tightening piece is used for applying axial pre-tightening force to bearings located on the outer side in the bearing pack; the noise reduction shell is arranged on the outer side of the machine body; the bearings, located on the outer side, in the bearing set can be always kept in a contact stress state under the action of the air bag pre-tightening piece, and compared with the prior art, the working performance of the screw machine is improved.

Description

Technical Field

[0001] This utility model belongs to the field of compression equipment technology, and in particular relates to a screw compressor. Background Technology

[0002] A screw compressor, also known as a screw compressor, consists of a pair of parallel, meshing male and female screws and is the most widely used type of rotary compressor. There are two types of screw compressors: single-screw and twin-screw. The term "screw compressor" usually refers to a twin-screw compressor. For example, a screw compressor disclosed in patent application number CN201821557886.X includes a casing with a female rotor and a male rotor inside. The female rotor's end is installed in a through hole of a female end sliding bearing, and the male rotor's end is installed in a through hole of a male end sliding bearing. A female limiting ring is located near the inner side of the female end sliding bearing at the end of the female rotor. The outer end face of the female rotor's end is locked to the female end sliding bearing by a female locking assembly. A female end washer is provided between the female limiting ring and the female end sliding bearing. Similarly, a male limiting ring is located near the inner side of the male end sliding bearing at the end of the male rotor. The outer end face of the male rotor's end is locked to the male end sliding bearing by a male locking assembly. A male end washer is provided between the male limiting ring and the male end sliding bearing.

[0003] During operation, the screw compressor experiences significant axial force due to the high-pressure gas. This force is borne by the inner bearing, while the outer bearing is relatively unloaded. This causes slippage between the outer ring and rolling elements of the outer bearing, affecting the compressor's performance. Furthermore, the compressor generates considerable noise during operation, causing noise pollution in the working environment. Therefore, improvements are necessary. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned technical problems by providing a screw compressor that improves the working performance of the screw compressor and reduces noise pollution in the working environment.

[0005] In view of the above, this utility model provides a screw compressor, comprising:

[0006] The machine body has a compression chamber inside, and air inlet and air outlet are provided on both sides of the machine body, which are connected to the compression chamber.

[0007] A screw, wherein the screw is disposed in the compression chamber, and both ends of the screw are rotatably connected to the machine body;

[0008] A bearing assembly is disposed at one end of the screw near the outlet end, and the bearing assembly includes two bearings arranged side by side;

[0009] Also includes:

[0010] An airbag preload is sleeved on the end of the screw and located between the bearing assembly and the machine body. The airbag preload is used to apply axial preload force to the bearing located on the outer side of the bearing assembly.

[0011] A noise-reducing housing, wherein the noise-reducing housing is disposed on the outside of the body;

[0012] Among them, the bearing located on the outer side of the bearing assembly can always maintain contact and force under the action of the airbag preload.

[0013] In this technical solution, during the operation of the screw compressor, the airbag preload component applies axial preload to the outer bearing in the bearing assembly. This ensures that the outer bearing remains in contact with the bearing under the action of the airbag preload component, reducing slippage and improving the working performance of the screw compressor. Furthermore, the preload through the airbag preload component effectively utilizes the good stability and shock absorption performance of the airbag, reducing the likelihood of mechanical fatigue and further improving the working performance of the screw compressor. At the same time, the noise reduction housing effectively reduces the transmission of noise generated during the operation of the screw compressor, preventing noise pollution in the working environment.

[0014] In the above technical solution, the airbag pretensioner further includes:

[0015] The airbag body is ring-shaped and has an inflation chamber inside.

[0016] A wear-resistant surface layer is disposed on the outer surface of the airbag body;

[0017] A reinforcing rib layer is provided on the inner surface of the airbag body;

[0018] A fiber layer is disposed on the surface of the reinforcing rib layer.

[0019] In the above technical solution, the noise-reducing housing further includes:

[0020] A double-layered shell, which consists of an inner shell and an outer shell distributed inside and outside;

[0021] A sound insulation gap, wherein the sound insulation gap is located between the outer shell and the inner shell;

[0022] A noise reduction layer is disposed on the opposite two surfaces of the outer shell and the inner shell;

[0023] Reflective protrusions, wherein there are a plurality of reflective protrusions and the plurality of reflective protrusions are evenly distributed on the surface of the noise reduction layer;

[0024] The outer shell and the inner shell are connected to each other by several thermally conductive support columns. The inner end of the thermally conductive support column is in contact with the surface of the body, and the outer end is located on the outer surface of the outer shell.

[0025] Furthermore, the above technical solution also includes:

[0026] A heat dissipation copper pipe is disposed in a heat-conducting support column, with the heated end of the heat dissipation copper pipe located at the lower end of the heat-conducting support column and the cooled end of the heat dissipation copper pipe located at the upper end of the heat-conducting support column.

[0027] The heated end of the heat dissipation copper pipe is in contact with the surface of the machine body through thermally conductive silicone grease, while the cooled end of the heat dissipation copper pipe is in contact with the outside air.

[0028] Furthermore, the above technical solution also includes:

[0029] A heat sink assembly is disposed at the heating end and cooling end of a heat dissipation copper tube, and the heat sink assembly includes several axial plates and several radial plates.

[0030] Among them, a number of axial plates are evenly spaced along the radial direction of the heat dissipation copper pipe on the surface of the end of the heat dissipation copper pipe, and a number of radial plates are evenly spaced along the axial direction of the heat dissipation copper pipe on the surface of the end of the heat dissipation copper pipe. The number of axial plates and the number of radial plates are adjacent to each other. The heat dissipation fin group on the cooling end of the heat dissipation copper pipe is in contact with the surface of the machine body through thermally conductive silicone grease.

[0031] The beneficial effects of this utility model are:

[0032] 1. By setting up the airbag preload, the bearings located on the outer side of the bearing assembly can always maintain contact and force under the action of the airbag preload, reducing slippage and improving the working performance of the screw compressor;

[0033] 2. The noise-reducing housing effectively reduces the transmission of noise generated during the operation of the screw compressor, preventing noise pollution in the working environment;

[0034] 3. The installation of heat-conducting support columns and heat dissipation copper pipes can effectively improve the heat dissipation performance of the screw compressor, reduce overheating problems, and further improve the working performance of the screw compressor. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of a specific embodiment of the present utility model.

[0037] Figure 2 This is a schematic diagram of the compression chamber structure of this utility model.

[0038] Figure 3 This is a schematic diagram of the airbag pretensioner structure of this utility model.

[0039] Figure 4 This is a schematic diagram of the noise reduction shell mechanism of this utility model.

[0040] Figure 5 This is a schematic diagram of the structure of Embodiment 4 of this utility model.

[0041] Figure 6 This is a schematic diagram of the heat sink assembly structure of this utility model.

[0042] The markings in the diagram are as follows:

[0043] 1. Body; 100. Inlet; 101. Outlet; 2. Compression chamber; 3. Screw; 4. Bearing assembly; 5. Airbag pretensioner; 50. Airbag body; 51. Inflation chamber; 52. Wear-resistant surface layer; 53. Reinforcing rib layer; 54. Fiber layer; 6. Noise-reducing outer shell; 60. Inner shell; 61. Outer shell; 62. Sound insulation gap; 63. Noise reduction layer; 64. Reflective protrusion; 65. Thermally conductive support column; 7. Heat dissipation copper pipe; 8. Axial plate; 9. Radial plate. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0045] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0046] Example 1:

[0047] This application provides a screw compressor 3, comprising: a body 1, a compression chamber 2 disposed within the body 1, and an air inlet 100 and an air outlet 101 communicating with the compression chamber 2 on both sides of the body 1; a screw 3 disposed in the compression chamber 2, with both ends of the screw 3 rotatably connected to the body 1; and a bearing assembly 4 disposed at the end of the screw 3 near the air outlet 101, the bearing assembly 4 comprising two bearings arranged in parallel.

[0048] It also includes: an airbag pretensioner 5, which is sleeved on the end of the screw 3 and located between the bearing assembly 4 and the body 1. The airbag pretensioner 5 is used to apply axial pretension force to the bearing located on the outer side of the bearing assembly 4; and a noise reduction housing 6, which is located on the outer side of the body 1.

[0049] Among them, the bearing located on the outer side of bearing group 4 can always maintain contact and force under the action of airbag preload 5.

[0050] Furthermore, the body 1, screw 3, and bearing assembly 4 are all conventional structures. The screw 3 also includes conventional transmission and drive structures, which will not be elaborated here.

[0051] In this embodiment, during the operation of the screw compressor 3, the airbag preload 5 applies axial preload to the outer bearing in the bearing assembly 4, ensuring that the outer bearing in the bearing assembly 4 remains in contact with the bearing under the action of the airbag preload 5, reducing slippage and improving the working performance of the screw compressor 3. Furthermore, the preload by the airbag preload 5 effectively utilizes the good stability and shock absorption performance of the airbag, reducing the likelihood of mechanical fatigue and further improving the working performance of the screw compressor 3. At the same time, the noise reduction housing 6 effectively reduces the transmission of noise generated during the operation of the screw compressor 3, preventing noise pollution in the working environment.

[0052] Example 2:

[0053] This embodiment provides a screw compressor 3, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the airbag pretensioner 5 further includes: an airbag body 50, the airbag body 50 is annular, and an inflation chamber 51 is provided inside the airbag body 50; a wear-resistant surface layer 52, the wear-resistant surface layer 52 is provided on the outer surface of the airbag body 50; a reinforcing rib layer 53, the reinforcing rib layer 53 is provided on the inner surface of the airbag body 50; and a fiber layer 54, the fiber layer 54 is provided on the surface of the reinforcing rib layer 53.

[0054] Moreover, the fiber layer 54 can be a carbon fiber layer 54.

[0055] In this embodiment, the wear-resistant surface layer 52 of the airbag body 50 can effectively reduce the damage caused by friction and improve the wear resistance of the airbag body 50. The reinforcing rib layer 53 and fiber layer 54 can effectively improve the structural strength of the airbag body 50, ensure that the inflation chamber 51 of the airbag body 50 can be fully filled with compressed gas and form effective support, reduce the phenomenon of airbag body 50 rupture due to pressure, and improve the working stability of the airbag pretensioner 5.

[0056] Example 3:

[0057] This embodiment provides a screw compressor 3, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the noise reduction housing 6 further includes: a double-layer housing, which is composed of an inner housing 60 and an outer housing 61 distributed inside and outside; a sound insulation gap 62, which is located between the outer housing 61 and the inner housing 60; a noise reduction layer 63, which is disposed on the opposite side surfaces of the outer housing 61 and the inner housing 60; and a plurality of reflective protrusions 64, which are evenly distributed on the surface of the noise reduction layer 63.

[0058] The outer shell 61 and the inner shell 60 are connected to each other by several thermally conductive support columns 65. The inner end of the thermally conductive support column 65 is in contact with the surface of the body 1, and the outer end is located on the outer surface of the outer shell 61.

[0059] In this embodiment, by setting up a double-layer shell, the noise generated during the operation of the screw 3 enters the sound insulation gap 62 during transmission. With the setting of the noise reduction layer 63 and the reflective protrusion 64, the sound waves can be continuously reflected in the sound insulation gap 62 to weaken them, preventing the noise from being further transmitted outward and effectively preventing noise pollution in the working environment. The heat-conducting support column 65 can effectively transfer the heat generated during the operation of the screw 3 to the outside, preventing the noise reduction shell 6 from affecting the heat dissipation performance of the machine body 1.

[0060] Example 4:

[0061] This embodiment provides a screw compressor 3, which, in addition to the technical solutions of the above embodiments, also has the following technical features, including: a heat dissipation copper pipe 7, which is disposed in a heat-conducting support column 65, with the heated end of the heat dissipation copper pipe 7 located at the lower end of the heat-conducting support column 65 and the cooled end of the heat dissipation copper pipe 7 located at the upper end of the heat-conducting support column 65.

[0062] The heat-receiving end of the heat dissipation copper pipe 7 is in contact with the surface of the body 1 through thermally conductive silicone grease, while the cooling end of the heat dissipation copper pipe 7 is in contact with the outside air.

[0063] It also includes: a heat sink assembly, which is set at the heated end and the cooled end of the heat dissipation copper pipe 7. The heat sink assembly includes several axial plates 8 and several radial plates 9.

[0064] Among them, a number of axial plates 8 are evenly spaced along the radial direction of the heat dissipation copper pipe 7 on the surface of the end of the heat dissipation copper pipe 7, and a number of radial plates 9 are evenly spaced along the axial direction of the heat dissipation copper pipe 7 on the surface of the end of the heat dissipation copper pipe 7. The number of axial plates 8 and the number of radial plates 9 are adjacent to each other, and the heat dissipation fin group on the cooling end of the heat dissipation copper pipe 7 is in contact with the surface of the body 1 through thermally conductive silicone grease.

[0065] In this embodiment, by setting up the heat dissipation copper pipe 7, the heat dissipation copper pipe 7 can further improve the heat transfer efficiency of the heat-conducting support column 65, thereby preventing the screw 3 machine from overheating during operation. By setting up the heat sink group, the heat exchange area between the heated end and the cooled end of the heat dissipation copper pipe 7 can be effectively increased, thereby further improving the heat transfer efficiency, preventing the screw 3 machine from overheating during operation, and improving the working performance of the screw 3 machine.

[0066] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A screw compressor, comprising: The machine body (1) has a compression chamber (2) inside it, and the machine body (1) has an air inlet (100) and an air outlet (101) on both sides that communicate with the compression chamber (2). Screw (3), the screw (3) is disposed in the compression chamber (2), and the two ends of the screw (3) are rotatably connected to the machine body (1); A bearing assembly (4) is provided at one end of the screw (3) near the outlet end (101), and the bearing assembly (4) includes two bearings arranged side by side; Its characteristic is that it further includes: Airbag pretensioner (5), the airbag pretensioner (5) is sleeved on the end of the screw (3) and located between the bearing assembly (4) and the body (1), the airbag pretensioner (5) is used to apply axial pretension force to the bearing located on the outer side of the bearing assembly (4); A noise-reducing housing (6) is disposed on the outside of the body (1); Among them, the bearing located on the outer side of the bearing assembly (4) can always maintain contact and force under the action of the airbag preload (5).

2. A screw compressor according to claim 1, characterized in that, The airbag pretensioner (5) also includes: The airbag body (50) is annular and has an inflation chamber (51) inside. A wear-resistant surface layer (52) is provided on the outer surface of the airbag body (50); A reinforcing rib layer (53) is provided on the inner surface of the airbag body (50); A fiber layer (54) is disposed on the surface of the reinforcing rib layer (53).

3. A screw compressor according to claim 2, characterized in that, The noise-reducing housing (6) also includes: A double-layer shell, which is composed of an inner shell (60) and an outer shell (61) distributed inside and outside; Sound insulation gap (62), the sound insulation gap (62) is located between the outer shell (61) and the inner shell (60); A noise reduction layer (63) is disposed on the opposite two surfaces of the outer shell (61) and the inner shell (60); Reflective protrusions (64), wherein there are a plurality of reflective protrusions (64) and the plurality of reflective protrusions (64) are evenly distributed on the surface of the noise reduction layer (63); The outer shell (61) and the inner shell (60) are connected to each other by a number of thermally conductive support columns (65). The inner end of the thermally conductive support column (65) is in contact with the surface of the body (1), and the outer end is located on the outer surface of the outer shell (61).

4. A screw compressor according to claim 3, characterized in that, Also includes: A heat dissipation copper pipe (7) is installed in a heat-conducting support column (65). The heated end of the heat dissipation copper pipe (7) is located at the lower end of the heat-conducting support column (65), and the cooled end of the heat dissipation copper pipe (7) is located at the upper end of the heat-conducting support column (65). The heat-receiving end of the heat-dissipating copper pipe (7) is in contact with the surface of the body (1) through thermally conductive silicone grease, and the cooling end of the heat-dissipating copper pipe (7) is in contact with the external air.

5. A screw compressor according to claim 4, characterized in that, Also includes: The heat sink assembly is disposed at the heating end and cooling end of the heat dissipation copper tube (7), and the heat sink assembly includes several axial plates (8) and several radial plates (9). Among them, a number of axial plates (8) are evenly spaced along the radial direction of the heat dissipation copper pipe (7) on the surface of the end of the heat dissipation copper pipe (7), and a number of radial plates (9) are evenly spaced along the axial direction of the heat dissipation copper pipe (7) on the surface of the end of the heat dissipation copper pipe (7). The number of axial plates (8) and the number of radial plates (9) are adjacent to each other. The heat dissipation plate group on the cooling end of the heat dissipation copper pipe (7) is in contact with the surface of the body (1) through thermally conductive silicone grease.

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