Internal spray direct-cooled shaft-sealless air compressor

Abstract

The application discloses an inner-jet direct-cooling air compressor without shaft seal, which comprises a screw compressor body for compressing air, wherein the screw compressor body is vertically arranged; a full-sealed motor is integrally arranged on the upper part of the screw compressor body without shaft seal, and the output shaft of the full-sealed motor is taper-connected to the screw of the compressor body; an oil-gas bucket is integrally arranged on the lower part of the screw compressor body, the oil-gas bucket is provided with an oil-gas separation assembly, the exhaust port of the screw compressor body is connected to the oil-gas separation assembly, the oil-gas bucket is provided with an oil discharge port, the oil discharge port is connected to the oil injection system of the full-sealed motor and the screw compressor body through an oil conveying pipeline, and the full-sealed motor is connected to the oil injection system through an oil conveying pipeline. The application solves the problem of low protection level of the motor and the compressor body of the existing compressor which are connected through a shaft coupling.

Description

Technical Field

[0001] This utility model relates to the field of air compressor technology, specifically to an internally injected direct-cooled shaftless air compressor. Background Technology

[0002] The motor, compressor body, and oil-gas separator are the three core components of a screw compressor unit. The motor is generally air-cooled or liquid-cooled, with an IP54 protection rating. The motor and compressor body are connected by a coupling and intermediate bracket, or by belt drive. The discharge end of the compressor body and the inlet end of the oil-gas separator are connected by pipeline.

[0003] The compressor body and motor are installed horizontally, and the oil-gas separator is installed separately and connected by pipelines. The above general installation method has the following shortcomings: 1. Poor transmission efficiency: the coupling transmission efficiency is around 99%, while the belt drive efficiency is below 99%. 2. The protection level of the entire unit cannot reach IP65 or higher; 3. Shaft seals are wear parts, and oil leakage from shaft seals often occurs; 4. Oil leaks also occur intermittently in the exhaust pipe of the engine head. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, an internally injected direct-cooled sealless air compressor is provided to solve the problem of low protection level caused by the use of a coupling between the motor and compressor body in existing compressors.

[0005] To achieve the above objectives, an internally injected, directly cooled, shaftless air compressor is provided, comprising: A screw compressor body for compressing air, the screw compressor body being arranged vertically; A fully sealed motor, without shaft seal, is integrally mounted on the upper part of the screw compressor body, and the output shaft of the fully sealed motor is taperedly connected to the screw of the screw compressor body; An oil-gas separator is integrally installed at the lower part of the screw compressor body. The oil-gas separator is equipped with an oil-gas separation component. The exhaust port of the screw compressor body is connected to the oil-gas separation component. The oil-gas separator has an oil drain port. The oil drain port is connected to the fully sealed motor and the oil injection system of the screw compressor body through an oil supply pipeline. The fully sealed motor is connected to the oil injection system through an oil supply pipeline.

[0006] Furthermore, the oil-gas separation assembly includes a cyclone separator and an oil-gas separator. The cyclone separator is installed inside the oil-gas tank, and the exhaust port is connected to the cyclone separator. The oil-gas separator is installed outside the oil-gas tank. A connecting port is provided at the top of the oil-gas tank, and the connecting port is connected to the oil-gas separator. The drain port of the oil-gas separator is connected to the fully sealed motor and the fuel injection system through an oil pipeline.

[0007] Furthermore, the cyclone separator is located at the top of the oil and gas tank.

[0008] Furthermore, the oil and gas tank is equipped with multiple support legs on its exterior, and the support legs are inclined.

[0009] Furthermore, a shock-absorbing pad is installed at the lower end of the support leg.

[0010] Furthermore, the fully sealed motor is a fully enclosed permanent magnet motor.

[0011] The beneficial effects of this utility model are as follows: the internally injected direct-cooled shaftless air compressor is a fully sealed compressor. The internally injected oil-cooled, fully enclosed motor is connected to the screw compressor body via a Morse taper connection. The exhaust port of the screw compressor body is directly inserted into the oil-gas separation assembly inside the oil-gas tank. The three core components of the compressor unit (screw compressor body, fully sealed motor, and oil-gas tank) are vertically mounted as a single unit. The entire unit has a fully sealed structure with an IP68 protection rating. The integrated structure eliminates the main unit's shaft seal, eliminating the risk of shaft seal leakage and improving system stability while reducing energy consumption and noise. Attached Figure Description

[0012] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the internal injection direct cooling shaftless air compressor according to an embodiment of the present invention.

[0013] Figure 2 This is an exploded structural diagram of the internally sprayed, direct-cooled, shaftless air compressor according to an embodiment of the present invention.

[0014] Figure 3 This is a schematic diagram illustrating the working principle of the internal injection direct cooling shaftless air compressor according to an embodiment of the present invention.

[0015] Figure label: Screw compressor body 1; 2. Fully sealed motor; 3. Oil-gas separator, 31. Cyclone separator, 32. Oil-gas separator, 33. Support legs, 34. Shock-absorbing pads. Detailed Implementation

[0016] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] Reference Figures 1 to 3 As shown, this utility model provides an internally injected direct-cooled shaftless air compressor, including: a screw compressor body 1, a fully sealed motor 2, and an oil-gas tank 3.

[0019] The screw compressor body 1 is used to compress air. The specific structure of the screw compressor body 1 is existing technology and will not be described in detail here. The screw compressor body 1 compresses air through a female rotor and a male rotor, and at the same time, lubricating oil is injected into the working chamber of the screw compressor body through an oil injection system to cool the compressed gas.

[0020] In this embodiment, the screw compressor body 1 is vertically arranged. The fully sealed motor 2 is integrally mounted on the upper part of the screw compressor body 1 without shaft seal. The output shaft of the fully sealed motor 2 is taperedly connected to the screw of the compressor body.

[0021] As a preferred implementation method, the fully sealed motor is a fully enclosed permanent magnet motor.

[0022] The oil-gas separator 3 is installed as an integral part at the bottom of the screw compressor body 1.

[0023] Oil-gas separator 3 is equipped with an oil-gas separation assembly. The oil-gas separation assembly is used to separate the oil from the oil-containing compressed gas generated by the screw compressor body, thus reproducing compressed gas.

[0024] Specifically, the exhaust port of the screw compressor body 1 is connected to the oil-gas separator assembly. The oil-gas separator 3 has an oil drain port. The oil drain port is connected to the fuel injection system of the fully sealed motor 2 and the screw compressor body 1 via an oil supply pipeline. The fully sealed motor 2 is connected to the fuel injection system via an oil supply pipeline.

[0025] As a preferred implementation method, see [reference]. Figure 3 As shown, the oil-gas separation assembly includes a cyclone separator 31 and an oil-gas separator 32.

[0026] In this embodiment, the cyclone separator 31 is installed inside the oil-gas tank 3. The exhaust port is connected to the cyclone separator 31. The cyclone separator uses centrifugal force to throw the oil in the oil-containing compressed gas towards the inner wall of the oil-gas tank. The oil and compressed air are coarsely separated.

[0027] An oil-gas separator 32 is installed on the outside of an oil-gas tank 3. A connecting port is provided at the top of the oil-gas tank 3. The connecting port of the oil-gas tank 3 is connected to the oil-gas separator 32. The drain port of the oil-gas separator 32 is connected to the fully sealed motor 2 and the oil injection system via an oil pipeline. In this embodiment, the oil-gas separator further refines the oil-liquid separation of the coarsely separated compressed air, allowing the compressed air to be discharged for industrial use.

[0028] In a preferred embodiment, the cyclone separator 31 is disposed at the upper part of the oil-gas tank 3. After oil separation, the oil flows down the inner wall of the oil-gas tank for further cooling and accumulation.

[0029] See Figure 1 As shown, in this embodiment, multiple support legs 33 are installed on the outside of the oil and gas tank 3. The support legs 33 are inclined. A shock-absorbing pad 34 is installed at the lower end of the support legs 33.

[0030] See Figure 3 As shown, the principle of the internal injection direct cooling shaftless air compressor of this utility model is as follows: S1. Air is drawn in through the inlet of the screw compressor body and compressed. The compressed gas containing oil enters the cyclone separator of the oil-gas separator from the outlet of the screw compressor body. Cyclone separation is performed in the cyclone separator inside the oil-gas separator. The compressed air after coarse separation enters the oil-gas separator for fine separation and is finally discharged from the exhaust port of the minimum pressure valve of the oil-gas separator.

[0031] S2. The low-temperature lubricating oil cooled in the oil-gas tank is divided into two parts. One part enters the oil injection system of the screw compressor body to cool the compressed air; the other part enters the fully enclosed motor to cool the fully enclosed motor. After merging in the compression chamber of the screw compressor body, it is discharged together with the compressed air into the cyclone separator of the oil-gas tank for cyclone separation and settles to the bottom of the oil-gas tank.

[0032] This utility model discloses an internally injected, directly cooled, shaft-seamless air compressor. It is a fully sealed compressor where an internally injected, oil-cooled, fully enclosed motor is connected to the screw compressor body via a Morse taper connection. The exhaust port of the screw compressor body is directly inserted into the oil-gas separation assembly (cyclone separator) inside the oil-gas tank. The three core components of the compressor unit (screw compressor body, fully sealed motor, and oil-gas tank) are vertically mounted as a single unit. The entire unit has a fully sealed structure with an IP68 protection rating. This integrated structure eliminates the main unit's shaft seal, eliminating the risk of shaft seal leakage and improving system stability while reducing energy consumption and noise.

[0033] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An internally injected, directly cooled, shaftless air compressor, characterized in that, include: A screw compressor body for compressing air, the screw compressor body being arranged vertically; A fully sealed motor, without shaft seal, is integrally mounted on the upper part of the screw compressor body, and the output shaft of the fully sealed motor is taperedly connected to the screw of the screw compressor body; An oil-gas separator is integrally installed at the lower part of the screw compressor body. Multiple support legs are mounted on the outside of the oil-gas separator, and these legs are inclined. Shock-absorbing pads are installed at the lower ends of the support legs. An oil-gas separator assembly is also installed on the oil-gas separator. The exhaust port of the screw compressor body is connected to the oil-gas separator assembly. An oil drain port is provided on the oil-gas separator. The oil drain port is connected to the fully sealed motor and the oil injection system of the screw compressor body via an oil supply pipeline. The fully sealed motor is connected to the oil injection system via an oil supply pipeline. The oil-gas separation assembly includes a cyclone separator and an oil-gas separator. The cyclone separator is installed inside the oil-gas tank, and the exhaust port is connected to the cyclone separator. The oil-gas separator is installed outside the oil-gas tank. A connecting port is provided at the top of the oil-gas tank, and the connecting port is connected to the oil-gas separator. The drain port of the oil-gas separator is connected to the fully sealed motor and the fuel injection system through an oil pipeline.

2. The internally injected direct-cooled shaftless air compressor according to claim 1, characterized in that, The cyclone separator is located at the top of the oil and gas tank.

3. The internally injected direct-cooled shaftless air compressor according to claim 1, characterized in that, The fully sealed motor is a fully enclosed permanent magnet motor.

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