A permanent magnet screw air compressor

Abstract

This utility model relates to the field of screw air compressor technology, specifically a permanent magnet screw air compressor, including a housing. A permanent magnet motor is fixedly installed at the bottom of the housing's inner cavity, and the screw air compressor body is fixedly installed at the output end of the permanent magnet motor. This utility model reduces energy loss and heat generation by utilizing a permanent magnet motor to drive the screw air compressor body. The high-temperature oil-gas mixture discharged from the screw air compressor body is separated into oil and gas by an oil-gas separator. The air is cooled by a fan after passing through a cooling box before being discharged. The lubricating oil is cooled in the cooling box after passing through the oil-gas separator and then reintroduced into the intake port of the screw air compressor body for use. This prevents oil deterioration caused by high temperatures, effectively reducing the heat generated during equipment operation and preventing overheating caused by oil deterioration. It also reduces costs and solves the problem that the large amount of heat generated during the operation of the screw air compressor body affects its efficiency.

Description

Technical Field

[0001] This utility model relates to the field of screw air compressor technology, specifically a permanent magnet screw air compressor. Background Technology

[0002] A screw compressor is a positive displacement gas compression machine whose working volume rotates. Gas compression is achieved by a change in volume, which is accomplished by the rotational motion of a pair of rotors within the compressor housing. The basic structure of a screw air compressor consists of a pair of meshing helical rotors arranged in parallel within the compressor body. The rotor with protruding teeth outside its pitch circle is typically called the male rotor or male screw, while the rotor with concave teeth inside its pitch circle is called the female rotor or female screw. Generally, the male rotor is connected to the prime mover, driving the female rotor to rotate. The last pair of bearings on the rotors provides axial positioning and bears the axial force within the compressor. Cylindrical roller bearings at both ends of the rotors provide radial positioning and bear the radial force within the compressor. At both ends of the compressor body, there are orifices of a specific shape and size. One is for intake, called the inlet; the other is for exhaust, called the outlet.

[0003] Currently, in existing technologies, screw air compressors generate a large amount of heat during operation. The heat from screw air compressors mainly comes from:

[0004] 1. When the ambient temperature is too high, the cooling medium (air) used by the air compressor also rises.

[0005] 2. High temperatures will accelerate the oxidation, deterioration, and viscosity changes (thickening or thinning) of lubricating oil, and reduce its thermal conductivity, making it unable to effectively remove heat from the engine head;

[0006] 3. Heat generated by the equipment during long-term operation;

[0007] Excessive heat generated by a screw air compressor can affect the efficiency of mechanical operation and may even cause damage to mechanical parts, especially in summer when the ambient temperature is high. Therefore, it is necessary to propose a permanent magnet screw air compressor. Utility Model Content

[0008] To address the shortcomings of existing technologies, such as the significant heat generated during the operation of screw air compressors affecting their efficiency, this invention proposes a permanent magnet screw air compressor.

[0009] The technical solution adopted by this utility model to solve its technical problem is: a permanent magnet screw air compressor, including a housing, a permanent magnet motor is fixedly installed at the bottom of the inner cavity of the housing, a screw air compressor body is fixedly installed at the output end of the permanent magnet motor, and a circulating cooling mechanism is fixedly installed at one end of the screw air compressor body;

[0010] The circulating cooling mechanism includes an oil-gas separator, which is fixedly connected to the bottom of the inner cavity of the housing. The air inlet on the side wall of the oil-gas separator is connected to the screw air compressor body. A cooling box is embedded in the back of the housing and fixedly connected to the bottom of the inner cavity of the housing. A fan is fixedly installed on one side of the cooling box. The oil outlet on the side wall of the oil-gas separator is connected to the cooling box. One end of the cooling box is connected to the screw air compressor body.

[0011] Preferably, a solenoid valve is fixedly connected to the air inlet end of the screw air compressor body, and an air filter is fixedly connected to one end of the solenoid valve.

[0012] Preferably, the side wall of the box has multiple air inlets, and the top of the box has an exhaust vent.

[0013] Preferably, an air cooler is fixedly installed on the top of the inner wall of the cooling box, and an oil cooler is fixedly installed on the bottom of the inner wall of the cooling box. Dustproof nets are fixedly installed on the outer walls of the air cooler and the oil cooler, and the dustproof nets are embedded in the back of the box.

[0014] Preferably, an oil-gas separator is fixedly connected to the top outlet of the oil-gas separator, one end of which is connected to the screw air compressor body, and the other end of which is connected to the air cooler.

[0015] Preferably, a temperature regulating valve is fixedly connected to one end of the oil outlet on the side wall of the oil-gas separator, and the oil-gas separator is connected to the oil cooler through the temperature regulating valve.

[0016] Preferably, an oil-gas filter is fixedly connected to one end of the oil cooler, and the oil cooler is connected to the screw air compressor body through the oil-gas filter.

[0017] The advantages of this utility model are:

[0018] This invention reduces energy loss and heat generation by using a permanent magnet motor to drive the screw air compressor body. The high-temperature oil-gas mixture discharged from the screw air compressor body is separated into oil and gas in an oil-gas separator. The air is cooled by a fan after passing through a cooling box and then discharged. The lubricating oil is cooled in the cooling box after passing through the oil-gas separator and then reintroduced into the intake port of the screw air compressor body for use. This prevents the oil from deteriorating due to high temperature, effectively reducing the heat generated during equipment operation and the overheating of the equipment caused by oil deterioration. At the same time, it reduces costs and solves the problem that the large amount of heat generated during the operation of the screw air compressor body affects the efficiency of the screw air compressor body. Attached Figure Description

[0019] 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.

[0020] Figure 1 This is a schematic diagram of the front structure of this utility model;

[0021] Figure 2 This is a structural diagram of the back of the present invention;

[0022] Figure 3 This is a front cross-sectional view of the present invention.

[0023] Figure 4 This is a side sectional view of the structure of this utility model;

[0024] Figure 5 This is a cross-sectional view of the rear of the present invention.

[0025] In the diagram: 1. Housing; 11. Air inlet; 12. Exhaust outlet; 2. Permanent magnet motor; 21. Screw air compressor body; 22. Air filter; 23. Solenoid valve; 3. Circulating cooling mechanism; 31. Oil-gas separator; 32. Oil-gas separator; 33. Air cooler; 34. Cooling box; 35. Fan; 36. Dustproof net; 37. Oil-gas filter; 38. Temperature regulating valve; 39. Oil cooler. Detailed Implementation

[0026] 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 scope of protection of the present utility model.

[0027] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0028] This application discloses a permanent magnet screw air compressor. (Refer to...) Figures 1-5A permanent magnet screw air compressor includes a housing 1. A permanent magnet motor 2 is fixedly installed at the bottom of the inner cavity of the housing 1. A screw air compressor body 21 is fixedly installed at the output end of the permanent magnet motor 2. A circulating cooling mechanism 3 is fixedly installed at one end of the screw air compressor body 21. The screw air compressor body 21 is driven by the permanent magnet motor 2, which greatly reduces the heat generation of the screw air compressor body 21. At the same time, the oil-gas mixture discharged from the screw air compressor body 21 has a high temperature. After the oil-gas mixture is separated by the oil-gas separator 31, the air is cooled by the circulating cooling mechanism 3 and then discharged. The lubricating oil is cooled by the circulating cooling mechanism 3 and then recycled. This effectively prevents the lubricating oil from deteriorating due to high temperature and causing the equipment to overheat, while also reducing costs.

[0029] The circulating cooling mechanism 3 includes an oil-gas separator 31, which is fixedly connected to the bottom of the inner cavity of the housing 1. The air inlet on the side wall of the oil-gas separator 31 is connected to the screw air compressor body 21. A cooling box 34 is embedded in the back of the housing 1 and is fixedly connected to the bottom of the inner cavity of the housing 1. A fan 35 is fixedly installed on one side of the cooling box 34. The oil outlet on the side wall of the oil-gas separator 31 is connected to the cooling box 34. One end of the cooling box 34 is connected to the screw air compressor body 21. By introducing the air and lubricating oil in the separated oil-gas mixture into the cooling box 34 and cooling them with the fan 35, the air is discharged after cooling, and the lubricating oil is recycled back into the screw air compressor body 21 for reuse after cooling.

[0030] Reference Figure 3 A solenoid valve 23 is fixedly connected to the air inlet end of the screw air compressor body 21. An air filter 22 is fixedly connected to one end of the solenoid valve 23. During the air intake process, the free air passes through the air filter 22 to filter dust and impurities before entering the air intake port of the screw air compressor body 21 and mixing with the lubricating oil sprayed during the compression process. This prevents impurities from contaminating the oil-air mixture. The solenoid valve 23 facilitates the opening and closing of the air intake port of the screw air compressor body 21.

[0031] Reference Figure 1 and Figure 2 The box 1 has multiple air inlets 11 on its side wall and an exhaust vent 12 on its top. The air inlets 11 on the side wall and the exhaust vent 12 on the top work together to form air convection with the outside air, effectively reducing the temperature inside the box 1.

[0032] Reference Figure 3 , Figure 4 and Figure 5An air cooler 33 is fixedly installed on the top of the inner wall of the cooling box 34, and an oil cooler 39 is fixedly installed on the bottom of the inner wall of the cooling box 34. Dustproof nets 36 are fixedly installed on the outer walls of the air cooler 33 and the oil cooler 39, and are embedded in the back of the box body 1. An oil-gas separator 32 is fixedly connected to the top outlet of the oil-gas separator 31. One end of the oil-gas separator 32 is connected to the screw air compressor body 21, and the other end is connected to the air cooler 33. A temperature regulating valve 38 is fixedly connected to one end of the oil outlet on the side wall of the oil-gas separator 31. The oil-gas separator 31 is connected to the oil cooler 39 through the temperature regulating valve 38. An oil-gas filter 37 is fixedly connected to one end of the oil cooler 39, and the oil cooler 39 is connected to the screw air compressor through the oil-gas filter 37. The compressor body 21 is connected. During the oil injection and oil-gas separation process, when the screw air compressor body 21 is running normally, the lubricating oil in the oil-gas separator 31 maintains its circulation flow by relying on the discharge pressure of the screw air compressor body 21 and the pressure difference between the oil injection port and the discharge pressure. Under the action of the pressure difference, the lubricating oil enters the oil cooler 39 through the temperature regulating valve 38, and after passing through the oil-gas filter 37 to remove impurities, most of the lubricating oil is sprayed into the compression chamber of the screw air compressor body 21, which plays a role in lubrication, sealing, cooling and noise reduction. The remaining lubricating oil is sprayed into the bearing chamber and the speed-increasing gearbox. Some of the oil sprayed into the compression chamber is discharged into the oil-gas separator 31 along with the compressed air. After separation, most of the lubricating oil is separated out, and a small amount of lubricating oil undergoes secondary separation through the oil-gas filter 37. The lubricating oil separated in the secondary separation returns to the air intake of the screw air compressor body 21.

[0033] Working Principle: During operation, the permanent magnet motor 2 drives the screw air compressor body 21, effectively improving the operating efficiency of the screw air compressor body 21 while reducing energy consumption and heat. The air inlet 11 on the side wall of the housing 1, in conjunction with the exhaust 12 on the top, forms air convection with the external environment, reducing the internal temperature of the housing 1. The fan 35 inside the cooling box 34 provides wind cooling, and the dust filter 36 prevents dust from entering. During the intake process, free air passes through the air filter 22 to filter dust and impurities before entering the intake port of the screw air compressor body 21, where it mixes with the lubricating oil sprayed during compression. The solenoid valve 23 controls the opening and closing of the intake port of the screw air compressor body 21, and the circulating cooling mechanism 3 circulates and cools the oil-air mixture. (The text abruptly ends here, likely due to an incomplete sentence or missing information.) During the oil-gas separation process, when the screw air compressor body 21 is running normally, the lubricating oil in the oil-gas separator 31 maintains its circulation flow by relying on the pressure difference between the exhaust pressure of the screw air compressor body 21 and the oil inlet. Under the action of the pressure difference, the lubricating oil enters the oil cooler 39 through the temperature regulating valve 38, and after passing through the oil-gas filter 37 to remove impurities, most of the lubricating oil is sprayed into the compression chamber of the screw air compressor body 21, playing a role in lubrication, sealing, cooling, and noise reduction. The remaining lubricating oil is sprayed into the bearing chamber and the speed-increasing gearbox. Some of the oil sprayed into the compression chamber is discharged into the oil-gas separator 31 along with the compressed air. After separation, most of the lubricating oil is separated out, and a small amount of lubricating oil undergoes secondary separation through the oil-gas filter 37. The lubricating oil separated in the secondary separation returns to the intake port and other low-pressure ends of the screw air compressor body 21. The air separated in the oil-gas separator 31 is discharged after secondary separation by the oil-gas separator 32 and then through the air cooler 33.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A permanent magnet screw air compressor comprising a box (1), characterized in that: A permanent magnet motor (2) is fixedly installed at the bottom of the inner cavity of the housing (1). A screw air compressor body (21) is fixedly installed at the output end of the permanent magnet motor (2). A circulating cooling mechanism (3) is fixedly installed at one end of the screw air compressor body (21). The circulating cooling mechanism (3) includes an oil-gas separator (31), which is fixedly connected to the bottom of the inner cavity of the housing (1). The air inlet on the side wall of the oil-gas separator (31) is connected to the screw air compressor body (21). A cooling box (34) is embedded in the back of the housing (1). The cooling box (34) is fixedly connected to the bottom of the inner cavity of the housing (1). A fan (35) is fixedly installed on one side of the cooling box (34). The oil outlet on the side wall of the oil-gas separator (31) is connected to the cooling box (34). One end of the cooling box (34) is connected to the screw air compressor body (21).

2. A permanent magnet screw air compressor as claimed in claim 1 wherein: The screw air compressor body (21) is fixedly connected to an air inlet end with a solenoid valve (23), and an air filter (22) is fixedly connected to one end of the solenoid valve (23).

3. A permanent magnet screw air compressor as claimed in claim 1, wherein: The box (1) has multiple air inlets (11) on its side wall and an exhaust vent (12) on its top.

4. A permanent magnet screw air compressor as claimed in claim 1, wherein: An air cooler (33) is fixedly installed on the top of the inner wall of the cooling box (34), and an oil cooler (39) is fixedly installed on the bottom of the inner wall of the cooling box (34). A dustproof net (36) is fixedly installed on the outer wall of the air cooler (33) and the oil cooler (39), and the dustproof net (36) is embedded in the back of the box body (1).

5. A permanent magnet screw air compressor according to claim 4, characterized in that: An oil-gas separator (32) is fixedly connected to the top outlet of the oil-gas separator (31). One end of the oil-gas separator (32) is connected to the screw air compressor body (21), and the other end of the oil-gas separator (32) is connected to the air cooler (33).

6. A permanent magnet screw air compressor as claimed in claim 5 wherein: A temperature regulating valve (38) is fixedly connected to one end of the oil outlet on the side wall of the oil-gas separator (31), and the oil-gas separator (31) is connected to the oil cooler (39) through the temperature regulating valve (38).

7. A permanent magnet screw air compressor as claimed in claim 6 wherein: One end of the oil cooler (39) is fixedly connected to an oil-gas filter (37), and the oil cooler (39) is connected to the screw air compressor body (21) through the oil-gas filter (37).

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