Oil-free air-cooled screw air compressor

Abstract

The utility model belongs to the technical field of air compressors, and particularly relates to an oil-free air-cooled screw air compressor which comprises a mounting base, a screw joint fixing seat is arranged at the top of the mounting base, and a driving motor and an oil-free screw air compressor are mounted at the top of the screw joint fixing seat. An air inlet flange and an exhaust flange are arranged at the top and the bottom of the oil-free screw air compressor respectively, the air inlet flange is connected with an air inlet pipe, the exhaust flange is connected with an exhaust pipe, a protective cover is mounted at the top of the mounting base, a first air pipe and a second air pipe are mounted on the inner side of the protective cover in an inserted manner, and fans are mounted on the inner sides of the two ends of the first air pipe and the second air pipe. And the outer sides of the driving motor, the machine body and the exhaust pipe are sleeved with a motor heat dissipation sleeve, an air compressor heat dissipation sleeve and an exhaust pipe heat dissipation sleeve correspondingly. According to the device, the heat dissipation efficiency can be improved, and corrosion of moisture and dust in outside air to the air compressor body is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of air compressor technology, specifically relating to an oil-free air-cooled screw air compressor. Background Technology

[0002] Oil-free, air-cooled screw air compressors are high-efficiency, clean air compression devices widely used in industries with strict air quality requirements. They utilize a pair of meshing helical rotors (male and female rotors) rotating within the casing, compressing air between the screw teeth. Key features include: no lubricating oil is used in the compression chamber, preventing oil contamination of the compressed air and ensuring the purity of the output air; air cooling eliminates the need for a water cooling system; a compact structure makes them suitable for applications with limited water or installation space.

[0003] To protect the air compressor, it is usually installed inside the housing structure. Traditional equipment often relies on fans installed on the housing for heat dissipation. However, the airflow is dispersed and the wind speed is uneven, resulting in low heat dissipation efficiency of the motor and screw compressor under high temperature conditions. The temperature of the compressed air is prone to being too high. At the same time, the open heat dissipation design allows external dust and moisture to come into contact with the core components, causing corrosion and affecting the life of the equipment. Utility Model Content

[0004] To address the above problems, the purpose of this utility model is to provide an oil-free, air-cooled screw air compressor that can improve heat dissipation efficiency and reduce the corrosion of the compressor body caused by moisture and dust in the outside air.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an oil-free air-cooled screw air compressor, including a mounting base, a screw-fitted fixing seat on the top of the mounting base, a drive motor and an oil-free screw air compressor mounted on the top of the screw-fitted fixing seat, an inlet flange and an exhaust flange on the top and bottom of the oil-free screw air compressor respectively, the inlet flange being connected to an inlet pipe and the exhaust flange being connected to an exhaust pipe, a protective cover mounted on the top of the mounting base, and a first air duct and a second air duct inserted into the inner side of the protective cover, the first air duct and the second air duct... Fans are installed on the inner sides of both ends of the two air ducts. The outer sides of the drive motor, the machine body, and the exhaust pipe are respectively fitted with a motor heat dissipation sleeve, an air compressor heat dissipation sleeve, and an exhaust pipe heat dissipation sleeve. The outer sides of the motor heat dissipation sleeve, the air compressor heat dissipation sleeve, and the exhaust pipe heat dissipation sleeve are all provided with a first heat conduction pipe. One end of the first heat conduction pipe is connected to a first heat conduction plate. The sides of the first air duct and the second air duct are screwed with side cover plates. A second heat conduction pipe is inserted through and snapped into the side cover plate. A heat dissipation fin is fitted on the outer side of one end of the second heat conduction pipe. The outer side of the other end of the second heat conduction pipe is connected to a second heat conduction plate.

[0006] The beneficial effects of this invention are as follows: Compared with air compressors that rely on fans mounted on the casing for heat dissipation, this device has higher heat dissipation efficiency. By limiting the width of the airflow channel through the first and second air ducts, the airflow generated by the fan can flow quickly and concentratedly in the first and second air ducts, acting entirely on the heat sink. Relying on the large-area contact between the heat sink and the air, and the airflow flowing quickly through the heat sink, heat is quickly carried away, improving heat dissipation efficiency, rather than being dispersed into the casing, resulting in reduced wind speed, more scattered airflow distribution, and a large amount of airflow not being able to contact the air compressor body and motor, resulting in low heat dissipation efficiency. At the same time, since the drive motor and oil-free screw air compressor are both enclosed inside the protective cover, and the interior of the first and second air ducts is completely isolated from the interior of the protective cover, the drive motor and oil-free screw air compressor do not come into direct contact with the outside air during long-term operation, which can reduce the corrosion of the air compressor body caused by moisture and dust in the outside air.

[0007] To compress air:

[0008] As a further improvement to the above technical solution: the oil-free screw air compressor includes a body, an inlet flange connected to the top of the body, an exhaust flange connected to the bottom of the body, a transmission chamber and a compression channel provided on the inner side of the body, a first rotating shaft and a second rotating shaft rotatably mounted on the inner side of the transmission chamber, a first gear and a second gear respectively sleeved on the outer side of the first rotating shaft and the second rotating shaft, the output end of the drive motor connected to the first rotating shaft, and one end of the first rotating shaft and the second rotating shaft respectively connected to the first screw and the second screw.

[0009] The first shaft is driven to rotate by a drive motor, which in turn drives the first gear to rotate. The transmission between the first and second gears drives the second shaft to rotate synchronously, which in turn drives the first and second screws to rotate synchronously. Air enters the compression channel through the intake pipe and intake flange. Driven by the first and second screws, the air flows towards the exhaust flange and is compressed. The compressed air is discharged into the exhaust pipe through the exhaust flange and delivered to the compressed air tank.

[0010] As a further improvement to the above technical solution: the air intake pipe extends through the top of the protective cover, and the exhaust pipe extends through the side of the protective cover.

[0011] The intake pipe extends through the top of the protective cover to draw in outside air, while the exhaust pipe extends through the side of the protective cover and connects to the compressed air tank.

[0012] To facilitate the removal of the heatsink:

[0013] As a further improvement to the above technical solution: the distance between the top and bottom of the side cover plate is greater than the distance between the highest and lowest points of the heat sink.

[0014] The beneficial effect of this improvement is that when it is necessary to clean the heat sink, the screws connecting the side cover plate to the first air duct and the second air duct can be removed, and the side cover plate, along with the first heat pipe and the heat sink, can be removed from the first air duct and the second air duct.

[0015] To secure the first duct to the protective cover, and the second duct to the protective cover:

[0016] As a further improvement to the above technical solution: a fixing plate is provided on the outer side of one end of the first air duct and the second air duct, and the fixing plate is screwed to the protective cover.

[0017] The beneficial effects of this improvement are: the fixing plate and the protective cover are fixed together by screws, thereby fixing the first air duct and the protective cover, and the second air duct and the protective cover.

[0018] To ensure efficient heat transfer between the first and second heat-conducting plates:

[0019] As a further improvement to the above technical solution: the second heat-conducting plate and the first heat-conducting plate are screwed together and fixed. The sides of the second heat-conducting plate and the first heat-conducting plate are provided with thermal grease filling grooves, and the inner side of the thermal grease filling grooves is filled with thermal grease.

[0020] The beneficial effects of this improvement are: the screw connection between the second heat-conducting plate and the first heat-conducting plate ensures close contact between them, and with the addition of thermal grease, heat can be transferred efficiently between the second heat-conducting plate and the first heat-conducting plate.

[0021] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the right front axonometric structure of this utility model;

[0023] Figure 2 This is a cross-sectional view of the present invention;

[0024] Figure 3 This is an isometric view of the protective cover of this utility model (not shown).

[0025] Figure 4 This is a top view of the protective cover of this utility model (not shown).

[0026] Figure 5 This is an isometric sectional view of the oil-free screw air compressor of this utility model;

[0027] Figure 6 This is a top sectional view of the oil-free screw air compressor of this utility model;

[0028] Figure 7 This is a schematic diagram of the structure of the motor heat sink in this utility model;

[0029] Figure 8 This is a schematic diagram of the structure of the heat dissipation sleeve for the air compressor of this utility model;

[0030] Figure 9 This is a schematic diagram of the structure of the exhaust pipe heat dissipation sleeve in this utility model;

[0031] In the diagram: 1. Mounting base; 2. Screw-fitted mounting base; 3. Drive motor; 4. Oil-free screw air compressor; 5. Machine body; 6. Transmission chamber; 7. First rotating shaft; 8. Second rotating shaft; 9. First gear; 10. Second gear; 11. First screw; 12. Second screw; 13. Compression channel; 14. Inlet flange; 15. Exhaust flange; 16. Inlet pipe; 17. Exhaust pipe; 18. Protective cover; 19. First air duct; 20. Second air duct; 21. Side cover plate; 22. Fixing plate; 23. Fan; 24. Motor heat sink; 25. Air compressor heat sink; 26. Exhaust pipe heat sink; 27. First heat conduction pipe; 28. First heat conduction plate; 29. ​​Second heat conduction plate; 30. Second heat conduction pipe; 31. Heat sink; 32. Thermal grease. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0033] like Figure 1-9As shown, an oil-free, air-cooled screw air compressor includes a mounting base 1. A screw-fitted fixing seat 2 is provided on the top of the mounting base 1. A drive motor 3 and an oil-free screw air compressor 4 are mounted on the top of the screw-fitted fixing seat 2. An inlet flange 14 and an exhaust flange 15 are respectively provided on the top and bottom of the oil-free screw air compressor 4. The inlet flange 14 is connected to an inlet pipe 16, and the exhaust flange 15 is connected to an exhaust pipe 17. A protective cover 18 is installed on the top of the mounting base 1. A first air duct 19 and a second air duct 20 are inserted and installed inside the protective cover 18. Fans are installed on the inner sides of both ends of the first air duct 19 and the second air duct 20. 23. The outer sides of the drive motor 3, the body 5, and the exhaust pipe 17 are respectively fitted with a motor heat dissipation sleeve 24, an air compressor heat dissipation sleeve 25, and an exhaust pipe heat dissipation sleeve 26. The outer sides of the motor heat dissipation sleeve 24, the air compressor heat dissipation sleeve 25, and the exhaust pipe heat dissipation sleeve 26 are each provided with a first heat conduction pipe 27. One end of the first heat conduction pipe 27 is connected to a first heat conduction plate 28. The sides of the first air duct 19 and the second air duct 20 are each screwed with a side cover plate 21. A second heat conduction pipe 30 is passed through and snapped onto the side cover plate 21. A heat dissipation fin 31 is fitted on the outer side of one end of the second heat conduction pipe 30. The outer side of the other end of the second heat conduction pipe 30 is connected to a second heat conduction plate 29.

[0034] Compared to air compressors that rely on fans mounted on the casing for heat dissipation, this device has higher heat dissipation efficiency. By limiting the width of the airflow channel through the first air duct 19 and the second air duct 20, the airflow generated by the fan 23 can flow quickly and concentratedly through the first air duct 19 and the second air duct 20, and all of it acts on the heat sink 31. Relying on the large area of ​​contact between the heat sink 31 and the air and the airflow flowing quickly through the heat sink 31, the heat is quickly carried away, instead of being dispersed into the casing, resulting in a decrease in wind speed and a more scattered airflow distribution. A large amount of airflow cannot come into contact with the air compressor body and motor, resulting in low heat dissipation efficiency. At the same time, since the drive motor 3 and the oil-free screw air compressor 4 are both enclosed inside the protective cover 18, and the interior of the first air duct 19 and the second air duct 20 is completely isolated from the interior of the protective cover 18, the drive motor 3 and the oil-free screw air compressor 4 do not come into direct contact with the outside air during long-term operation, which can reduce the corrosion of the air compressor body caused by moisture and dust in the outside air.

[0035] The oil-free screw air compressor 4 includes a body 5. An inlet flange 14 is connected to the top of the body 5, and an exhaust flange 15 is connected to the bottom of the body 5. A transmission chamber 6 and a compression channel 13 are provided inside the body 5. A first rotating shaft 7 and a second rotating shaft 8 are rotatably installed inside the transmission chamber 6. A first gear 9 and a second gear 10 are respectively sleeved on the outer sides of the first rotating shaft 7 and the second rotating shaft 8. The output end of the drive motor 3 is connected to the first rotating shaft 7, and one end of the first rotating shaft 7 and the second rotating shaft 8 is connected to the first screw 11 and the second screw 12, respectively.

[0036] The first rotating shaft 7 is driven by the drive motor 3, which in turn drives the first gear 9 to rotate. The transmission between the first gear 9 and the second gear 10 drives the second rotating shaft 8 to rotate synchronously, thereby driving the first screw 11 and the second screw 12 to rotate synchronously. Air enters the compression channel 13 through the intake pipe 16 and the intake flange 14. Driven by the first screw 11 and the second screw 12, the air flows towards the exhaust flange 15 and is compressed. The compressed air is discharged into the exhaust pipe 17 through the exhaust flange 15 and delivered to the compressed air tank.

[0037] The intake pipe 16 extends through the top of the protective cover 18, and the exhaust pipe 17 extends through the side of the protective cover 18.

[0038] The intake pipe 16 extends through the top of the protective cover 18 to draw in outside air, and the exhaust pipe 17 extends through the side of the protective cover 18 and connects to the compressed air tank.

[0039] The distance between the top and bottom of the side cover plate 21 is greater than the distance between the highest and lowest points of the heat sink 31.

[0040] When it is necessary to clean the heat sink 31, after removing the screws connecting the side cover plate 21 to the first air duct 19 and the second air duct 20, the side cover plate 21, along with the first heat pipe 27 and the heat sink 31, can be removed from the first air duct 19 and the second air duct 20.

[0041] A fixing plate 22 is provided on the outer side of one end of the first air duct 19 and the second air duct 20, and the fixing plate 22 is screwed to the protective cover 18.

[0042] The fixing plate 22 is screwed to the protective cover 18, thereby fixing the first air duct 19 to the protective cover 18 and the second air duct 20 to the protective cover 18.

[0043] The second heat-conducting plate 29 and the first heat-conducting plate 28 are screwed together and fixed. The sides of the second heat-conducting plate 29 and the first heat-conducting plate 28 are provided with thermal grease filling grooves, and the inner side of the thermal grease filling grooves is filled with thermal grease 32.

[0044] The second heat-conducting plate 29 and the first heat-conducting plate 28 are screwed together to ensure close contact between them. With the addition of thermal grease 32, heat can be transferred efficiently between the second heat-conducting plate 29 and the first heat-conducting plate 28.

[0045] The working principle and usage process of this utility model are as follows: When in use, the drive motor 3 drives the first rotating shaft 7 to rotate, which in turn drives the first gear 9 to rotate. The transmission between the first gear 9 and the second gear 10 drives the second rotating shaft 8 to rotate synchronously, thereby driving the first screw 11 and the second screw 12 to rotate synchronously. Air enters the compression channel 13 through the intake pipe 16 and intake flange 14, and flows towards the exhaust flange 15 and is compressed under the drive of the first screw 11 and the second screw 12. The compressed air is discharged into the exhaust pipe 17 through the exhaust flange 15 and delivered to the compressed air tank. During the operation of this device, the fan 23 is controlled to operate, allowing outside air to flow from the first air duct 19 and the second air duct 2... The heat generated during the operation of the drive motor 3 and the oil-free screw air compressor 4, as well as the temperature generated by the air during compression, flows in from one end and exits from the other. This heat is conducted to the motor heat sink 24, the air compressor heat sink 25, and the exhaust pipe heat sink 26, respectively. This heat is then conducted to the first heat-conducting plate 28 through the first heat-conducting pipe 27. The first heat-conducting plate 28 and the second heat-conducting plate 29 are in close contact, and both the second heat-conducting plate 29 and the first heat-conducting plate 28 have thermal grease filling grooves on their sides. The inner side of each thermal grease filling groove is filled with thermal grease 32. The heat on the first heat-conducting plate 28 can be efficiently transferred to the second heat-conducting plate 29, and the heat on the second heat-conducting plate 29 is transferred to the second heat-conducting pipe 30, and then through the second... Heat is conducted through the heat pipe 30 to the heat sink 31. The heat sink 31, with its closely arranged arrangement and large contact area with the air inside the first air duct 19 and the second air duct 20, rapidly transfers heat to the air within them. This heat is then carried away as the air inside the first air duct 19 and the second air duct 20 is exhausted. This effectively transfers heat from the drive motor 3, the oil-free screw air compressor 4, and the compressed air in the exhaust pipe 17, providing excellent heat dissipation. Compared to air compressors that rely on fans mounted on the casing for cooling, this device has higher heat dissipation efficiency. By limiting the width of the airflow channel through the first air duct 19 and the second air duct 20, the airflow generated by the fan 23 can be quickly and concentrated in the first air duct 19. The air flows through the second duct 20, and all the air is directed onto the heat sink 31. The heat is quickly carried away by the large contact area between the heat sink 31 and the air, and by the airflow flowing rapidly through the heat sink 31, rather than being dispersed into the outer casing. This results in a lower wind speed and a more dispersed airflow distribution. A large amount of airflow cannot come into contact with the air compressor body and motor, resulting in low heat dissipation efficiency. At the same time, since the drive motor 3 and the oil-free screw air compressor 4 are both enclosed inside the protective cover 18, and the interiors of the first duct 19 and the second duct 20 are completely isolated from the interior of the protective cover 18, the drive motor 3 and the oil-free screw air compressor 4 do not come into direct contact with the outside air during long-term operation, which can reduce the corrosion of the air compressor body caused by moisture and dust in the outside air.

[0046] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this application does not involve any improvement to the software and methods.

[0047] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. An oil-free, air-cooled screw air compressor, characterized in that: The system includes a mounting base (1), with a screw-on fixing seat (2) on the top. A drive motor (3) and an oil-free screw air compressor (4) are mounted on the top of the screw-on fixing seat (2). The oil-free screw air compressor (4) has an inlet flange (14) on its top and an exhaust flange (15) on its bottom. The inlet flange (14) is connected to an inlet pipe (16), and the exhaust flange (15) is connected to an exhaust pipe (17). A protective cover (18) is mounted on the top of the mounting base (1). A first air duct (19) and a second air duct (20) are inserted and installed inside the protective cover (18). Fans (23) are installed on the inner sides of both ends of the first air duct (19) and the second air duct (20). The drive motor... (3) The outer sides of the body (5) and the exhaust pipe (17) are respectively fitted with a motor heat dissipation sleeve (24), an air compressor heat dissipation sleeve (25), and an exhaust pipe heat dissipation sleeve (26). The outer sides of the motor heat dissipation sleeve (24), the air compressor heat dissipation sleeve (25), and the exhaust pipe heat dissipation sleeve (26) are each provided with a first heat conduction pipe (27). One end of the first heat conduction pipe (27) is connected to the first heat conduction plate (28). The sides of the first air duct (19) and the second air duct (20) are screwed with side cover plates (21). A second heat conduction pipe (30) is inserted through and snapped onto the side cover plate (21). A heat dissipation fin (31) is fitted on the outer side of one end of the second heat conduction pipe (30), and a second heat conduction plate (29) is connected to the outer side of the other end of the second heat conduction pipe (30).

2. The oil-free air-cooled screw air compressor according to claim 1, characterized in that: The oil-free screw air compressor (4) includes a body (5), with an air inlet flange (14) connected to the top of the body (5) and an exhaust flange (15) connected to the bottom of the body (5). The inner side of the body (5) is provided with a transmission chamber (6) and a compression channel (13). The inner side of the transmission chamber (6) is rotatably mounted with a first rotating shaft (7) and a second rotating shaft (8). The outer sides of the first rotating shaft (7) and the second rotating shaft (8) are respectively fitted with a first gear (9) and a second gear (10). The output end of the drive motor (3) is connected to the first rotating shaft (7). One end of the first rotating shaft (7) and the second rotating shaft (8) is connected to the first screw (11) and the second screw (12) respectively.

3. The oil-free air-cooled screw air compressor according to claim 1, characterized in that: The intake pipe (16) extends through the top of the protective cover (18), and the exhaust pipe (17) extends through the side of the protective cover (18).

4. The oil-free air-cooled screw air compressor according to claim 1, characterized in that: The distance between the top and bottom of the side cover (21) is greater than the distance between the highest and lowest points of the heat sink (31).

5. An oil-free air-cooled screw air compressor according to claim 1, characterized in that: A fixing plate (22) is provided on the outer side of one end of the first air duct (19) and the second air duct (20), and the fixing plate (22) is screwed to the protective cover (18).

6. The oil-free air-cooled screw air compressor according to claim 1, characterized in that: The second heat-conducting plate (29) and the first heat-conducting plate (28) are screwed together and fixed. The sides of the second heat-conducting plate (29) and the first heat-conducting plate (28) are provided with thermal grease filling grooves, and the inner side of the thermal grease filling grooves is filled with thermal grease (32).

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