An oil leakage recovery device for air compressors

Abstract

This application discloses an oil leakage recovery device for an air compressor, relating to the technical field of air compressors. It includes a compressor body and a motor, with a gap between the compressor body and the motor. The motor output shaft is inserted into the compressor body. It also includes an oil collection mechanism for collecting oil, located between the motor and the compressor body. The oil collection mechanism includes an oil collecting plate for collecting oil and an oil collecting tank for storing the collected oil. The oil collecting plate is installed at the end of the motor near the compressor body and is arranged around the motor output shaft. The oil collecting tank is located below the oil collecting plate. The oil collecting plate has an oil outlet on the side near the oil collecting tank, and the oil collecting tank has an oil inlet on the side near the oil collecting plate. This application collects and stores leaked oil through the oil collecting plate and oil collecting tank, achieving the effect of preventing oil from polluting the environment or entering the motor, and enabling the recycling of the collected and stored leaked oil.

Description

Technical Field

[0001] This application relates to the technical field of air compressors, and in particular to an oil leakage recovery device for air compressors. Background Technology

[0002] An air compressor is a device used to compress gases. Air compressors are similar in construction to water pumps. Most air compressors are reciprocating piston, rotary vane, or rotary screw types; among them, screw air compressors are increasingly widely used due to their long lifespan, low noise, and greater energy efficiency compared to the other two types.

[0003] In related technologies, a screw air compressor is a positive displacement compressor. A screw air compressor has two screws inside. The rotation of the two screws gradually reduces the internal air pressure, drawing in, compressing, and discharging air. The compressor body is connected to the motor via a gearbox. The motor's output shaft is connected to one of the screws inside the compressor body to transmit rotation. Lubricating oil is crucial in screw air compressors. To reduce wear and friction between the two screws, a layer of oil film is typically formed on the surface of the meshing joint to reduce direct contact between the two screws. However, oil can enter the motor along the output shaft, leading to insulation failure, short circuits, or even burnout. Therefore, an oil seal is often installed at the connection between the compressor body and the motor drive shaft to seal the compressor body and prevent oil leakage into the motor.

[0004] Regarding the aforementioned technologies, after prolonged use of an air compressor, the oil seal structure may experience slight wear and failure, leading to oil leakage from the compressor body. The leaking oil flows along the motor output shaft. Larger oil droplets, due to centrifugal force as the motor output shaft rotates, are flung around, polluting the environment and wasting oil. Smaller droplets are not flung away and eventually enter the motor, damaging it. Therefore, this application proposes an oil leakage recovery device for air compressors. Utility Model Content

[0005] This application provides an oil leakage recovery device for an air compressor.

[0006] This application provides an oil leakage recovery device for an air compressor, which adopts the following technical solution:

[0007] An oil leakage recovery device for an air compressor includes a compressor body and a motor, with a gap between the compressor body and the motor. The output shaft of the motor is inserted into the compressor body. The device also includes an oil collecting mechanism located between the motor and the compressor body. The oil collecting mechanism includes an oil collecting plate for collecting oil and an oil collecting tank for storing the collected oil. The oil collecting plate is installed at the end of the motor near the compressor body and is arranged around the motor output shaft. The oil collecting tank is located below the oil collecting plate. The oil collecting plate has an oil outlet on the side near the oil collecting tank, and the oil collecting tank has an oil inlet on the side near the oil collecting plate.

[0008] By adopting the above technical solution, the oil collecting plate is set around the motor output shaft and located between the motor and the compressor body. It can effectively intercept the oil leakage thrown out when the motor output shaft rotates, preventing oil from polluting the environment or entering the motor. The oil collecting plate intercepts the thrown oil, and then the oil drips down the plate from the oil outlet under the action of gravity. The oil falls into the oil collection tank through the oil inlet and is collected and stored, preventing oil leakage and waste. The collected oil can be reused, saving costs, and at the same time, it also avoids oil leakage from splashing around and polluting the environment.

[0009] Preferably, it further includes a pneumatic oil injection mechanism that draws oil from the oil collection tank back into the compressor body through the pressure difference during the intake phase. The pneumatic oil injection mechanism is located between the oil collection tank and the compressor body. The pneumatic oil injection mechanism includes an oil delivery pipe for conveying oil from the oil collection tank and an oil injection nozzle for injecting oil from the oil collection tank into the compressor body through the pressure difference. One end of the oil delivery pipe is connected to the oil collection tank, and the other end of the oil delivery pipe is connected to the oil injection nozzle. The oil injection nozzle is disposed within the compressor body.

[0010] By adopting the above technical solution, during the intake stage, since the air pressure inside the compressor body is lower than the external air pressure, the oil in the oil collection tank will be sucked into the compressor body through the oil delivery pipe and the oil injection nozzle, realizing the automated recycling of leaked oil, reducing oil waste, and lowering operation and maintenance costs.

[0011] Preferably, a one-way valve is installed inside the oil pipeline.

[0012] By adopting the above technical solution, the one-way valve in the oil pipeline can prevent oil or gas in the compressor body from flowing back into the oil collection tank, ensuring that the oil flows only from the oil collection tank to the compressor body, avoiding failure of the pneumatic oil injection mechanism, and ensuring the one-way stability and safety of the oil circulation path.

[0013] Preferably, the motor is provided with an oil seal for preventing oil from entering the motor interior. The oil seal is sleeved on the motor output shaft and located between the motor output shaft and the motor housing.

[0014] By adopting the above technical solution, the oil seal installed between the motor output shaft and the motor housing further prevents oil from entering the motor through the gap between the output shaft and the motor housing, reducing the risk of insulation failure or short circuit caused by oil leakage and extending the service life of the motor; and a small amount of oil remaining on the motor output shaft that has not been thrown out is blocked at the oil seal and gradually forms large oil droplets before being thrown out.

[0015] Preferably, a filter plate is provided at the oil inlet, and the size of the oil inlet is larger than the size of the oil outlet.

[0016] By adopting the above technical solution, the filter plate at the oil inlet can intercept larger particulate impurities, preventing large particulate impurities from entering the oil collection tank and clogging the connection between the oil delivery pipe and the oil collection tank; the oil inlet size is larger than the outlet size, ensuring that the oil dripping from the oil collection plate can be collected by the oil collection tank.

[0017] Preferably, a filter cotton is provided at the connection between the oil pipeline and the oil collection tank.

[0018] By adopting the above technical solution, the filter cotton at the connection between the oil supply pipe and the oil collection tank can filter out impurities such as metal shavings and dust in the leaked oil, preventing impurities from flowing back into the compressor body with the oil, thereby reducing the wear of impurities on the screw and ensuring the performance of the lubricating oil.

[0019] Preferably, the compressor body is provided with an oil-gas separator on the side away from the motor, and the compressor body is connected to the oil-gas separator.

[0020] By adopting the above technical solution, the oil-gas separator on the side of the air compressor body away from the motor can separate oil from the gas discharged by the compressor, recover the remaining oil and improve the purity of the discharged gas, reduce the oil content in the compressed air, and form a multi-layer oil recovery system with the oil collection mechanism to further reduce oil waste.

[0021] Preferably, the oil collection tank is provided with an mounting plate on the side away from the oil collection plate, and the motor, oil collection tank, compressor body and oil-gas separator are all mounted on the mounting plate.

[0022] By adopting the above technical solution, the mounting plate on the side of the oil collection tank away from the oil collection plate can integrate and fix components such as motor, oil collection tank, compressor body, and oil-gas separator, simplifying equipment layout, improving structural stability, facilitating overall installation, transportation and maintenance, and reducing on-site assembly complexity.

[0023] Preferably, the motor is slidably mounted on the mounting plate.

[0024] By adopting the above technical solution, the motor is slidably mounted on the mounting plate, which allows for flexible adjustment of the relative position of the motor and the air compressor body. This ensures the coaxiality of the motor output shaft and the internal screw of the compressor, and facilitates the oil collection plate to completely seal the exposed motor output shaft, preventing the oil thrown out by the motor output shaft from being blocked and collected by the oil collection plate.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. By installing an oil collection plate and an oil collection tank between the motor and the compressor body, the oil collection plate is arranged around the motor output shaft and located between the motor and the compressor body. It can effectively intercept the oil leakage thrown out when the motor output shaft rotates, preventing oil from polluting the environment or entering the motor. The oil collection plate intercepts the thrown oil, and then drips down the plate body from the oil outlet under the action of gravity. The oil falls into the oil collection tank through the oil inlet and is collected and stored, preventing oil leakage and waste. The collected oil leakage can be reused, saving costs, and also avoiding oil leakage from splashing around and polluting the environment.

[0027] 2. An oil delivery pipe and an oil injection nozzle are installed between the oil collection tank and the compressor body. During the suction phase, because the air pressure inside the compressor body is lower than the external air pressure, the oil in the oil collection tank is drawn into the compressor body through the oil delivery pipe and the oil injection nozzle, achieving automated oil recycling, reducing oil waste, and lowering operation and maintenance costs. By installing a one-way valve in the oil delivery pipe, backflow of oil or gas from the compressor body into the oil collection tank can be prevented, ensuring that oil flows only from the oil collection tank to the compressor body, avoiding failure of the pneumatic oil injection mechanism, and ensuring the unidirectional stability and safety of the oil circulation path.

[0028] 3. The oil seal installed between the motor output shaft and the motor housing further prevents oil from entering the motor through the gap between the output shaft and the motor housing, reducing the risk of insulation failure or short circuit caused by oil leakage and extending the service life of the motor; and a small amount of oil remaining on the motor output shaft that has not been thrown out is blocked at the oil seal and gradually forms a large oil droplet before being thrown out. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0030] Figure 2 yes Figure 1 A cross-sectional view along the AA direction;

[0031] Figure 3 yes Figure 1 Cross-sectional view along the BB direction.

[0032] Reference numerals in the attached diagram: 1. Compressor body; 2. Motor; 3. Oil seal; 4. Oil collection mechanism; 41. Oil collection plate; 411. Oil outlet; 42. Oil collection tank; 421. Oil inlet; 5. Pneumatic oil injection mechanism; 51. Oil delivery pipe; 52. Oil injection nozzle; 6. Oil-gas separator; 7. Mounting plate; 8. Filter plate; 9. Slide rail; 10. Slider. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1 -Appendix Figure 3 This application will be described in further detail.

[0034] This application discloses an oil leakage recovery device for an air compressor.

[0035] refer to Figure 1 and Figure 2 An oil leakage recovery device for an air compressor includes a compressor body 1, a motor 2, an oil seal 3 for preventing oil from entering the motor 2, an oil collection mechanism 4 for collecting oil, a pneumatic oil injection mechanism 5 for drawing oil from the oil collection tank 42 back into the compressor body 1 by the air pressure difference during the suction phase, an oil-gas separator 6, and a mounting plate 7. A gap is provided between the compressor body 1 and the motor 2. The output shaft of the motor 2 is inserted into the compressor body 1 and connected to a screw inside the compressor body 1 via a coupling. The oil seal 3 is sleeved on the output shaft of the motor 2 and clamped between the output shaft and the motor housing. A bearing is clamped and fixed on the side of the oil seal 3 closest to the output shaft of the motor 2, and the output shaft of the motor 2 is rotatably connected to the oil seal 3 via the bearing. The oil collection mechanism 4 is located between the motor 2 and the compressor body 1. The oil-gas separator 6 is connected to the side of the compressor body 1 away from the motor 2. The compressor body 1, the oil collection mechanism 4, and the oil-gas separator 6 are all mounted on the mounting plate 7, and the motor 2 is slidably mounted on the mounting plate.

[0036] refer to Figure 2 Specifically, the oil collecting mechanism 4 includes an oil collecting plate 41 for collecting oil and an oil collecting tank 42 for storing the collected oil. The oil collecting plate 41 is fixed to one end of the motor 2 near the compressor body 1 by bolts and is arranged around the output shaft of the motor 2. The oil collecting tank 42 is located below the oil collecting plate 41 and is fixed to the mounting plate 7 by bolts. An oil outlet 411 is provided on the side of the oil collecting plate 41 near the oil collecting tank 42, and an oil inlet 421 is provided on the side of the oil collecting tank 42 near the oil collecting plate 41. The size of the oil inlet 421 is larger than the size of the oil outlet 411. In this embodiment, the oil collecting plate 41 is arranged in a heptagonal shape that is symmetrical about the output shaft of the motor 2, and is arranged parallel to the side near the oil collecting tank 42 with an oil outlet 411.

[0037] A filter plate 8 is provided at the oil inlet 421, and a slot is provided at the oil inlet 421 in the oil collection tank 42. The filter plate 8 is installed on the oil collection tank 42 through the slot, so as to facilitate the disassembly, cleaning and replacement of the filter plate 8. In this embodiment, the filter plate 8 is a metal filter screen, which can filter out large particles of impurities in the oil.

[0038] refer to Figure 1 and Figure 3 The pneumatic oil injection mechanism 5 includes an oil delivery pipe 51 for conveying oil from the oil collection tank 42 and an oil injection nozzle 52 that injects oil from the oil collection tank 42 into the compressor body 1 via a pressure difference. The oil collection tank 42 has an outlet on its side wall. One end of the oil delivery pipe 51 is connected to the oil collection tank 42 through the outlet, and the other end of the oil delivery pipe 51 is fitted onto one end of the oil injection nozzle 52 and connected to it. A one-way valve is installed inside the oil delivery pipe 51. In this embodiment, the oil delivery pipe 51 is a rubber tube with a certain degree of flexibility, facilitating installation and arrangement. A filter cotton is installed at the connection between the oil delivery pipe 51 and the oil collection tank 42. The filter cotton can further filter out minute impurities in the oil, protecting the pneumatic oil injection mechanism 5 and the compressor body 1. The compressor body 1 has a mounting hole on its side wall. The end of the oil injection nozzle 52 away from the oil supply pipe 51 passes through the mounting hole and is snapped and fixed inside the compressor body 1. A sealing ring is provided between the mounting hole and the oil supply pipe 51. The sealing ring is fitted on the oil supply pipe 51 to ensure that the oil injection nozzle 52 can be snapped and fixed inside the compressor body 1, and to ensure the sealing of the compressor body 1. In this embodiment, the oil injection nozzle 52 is located at the position where the compressor body 1 communicates with the air inlet.

[0039] The compressor body 1 is mounted on the mounting plate 7 via a support column, and the oil-gas separator 6 is placed on the mounting plate 7 via a pad. The oil-gas separator 6 is connected to the compressor body 1 via a pipe, and its main function is to separate the oil from the compressed air.

[0040] refer to Figure 1 The mounting plate 7 is provided with a slide rail 9 and a slider 10. The slide rail is parallel to the axis of the output shaft of the motor 2. The motor 2 is fixed to the slider by bolts and then slides on the slide rail. The relative position of the motor 2 and the air compressor body can be flexibly adjusted to ensure the coaxiality of the output shaft of the motor 2 and the screw inside the compressor. It also makes it easy for the oil collection plate 41 to completely cover the exposed output shaft of the motor 2, preventing the oil thrown out by the output shaft of the motor 2 from being blocked and collected by the oil collection plate 41.

[0041] The implementation principle of this embodiment is as follows: After the oil leaks out from the compressor body 1, it flows along the output shaft of the motor 2. As the output shaft of the motor 2 rotates, it is thrown onto the oil collection plate 41 on the periphery by centrifugal force. Then, the oil drips from the oil outlet 411 into the oil collection tank 42 under the action of gravity. During the suction stage, since the air pressure inside the compressor body 1 is lower than the outside air pressure, the oil in the oil collection tank 42 will be sucked into the compressor body 1 through the oil delivery pipe 51 and the oil injection nozzle 52 for lubrication.

[0042] In summary, the oil collecting plate 41 is arranged around the output shaft of the motor 2 and located between the motor 2 and the compressor body 1. It can effectively intercept the oil leakage thrown out when the output shaft of the motor 2 rotates, preventing oil from polluting the environment or entering the motor 2. The oil collecting plate 41 intercepts the thrown oil, and then the oil drips down the plate body from the oil outlet 411 under the action of gravity. The oil falls into the oil collecting tank 42 through the oil inlet 421 and is collected and stored. This prevents the oil leakage from splashing out, and the collected oil leakage can be reused, saving costs. At the same time, it also avoids the oil leakage from splashing out and polluting the environment.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An oil leakage recovery device for an air compressor, comprising a compressor body (1) and a motor (2), a gap being provided between the compressor body (1) and the motor (2), and an output shaft of the motor (2) being inserted into the inside of the compressor body (1), characterized in that, It also includes an oil collecting mechanism (4) for collecting oil, which is located between the motor (2) and the compressor body (1). The oil collecting mechanism (4) includes an oil collecting plate (41) for collecting oil and an oil collecting tank (42) for storing the collected oil. The oil collecting plate (41) is installed at one end of the motor (2) near the compressor body (1) and is arranged around the output shaft of the motor (2). The oil collecting tank (42) is located below the oil collecting plate (41). An oil outlet (411) is provided on the side of the oil collecting plate (41) near the oil collecting tank (42), and an oil inlet (421) is provided on the side of the oil collecting tank (42) near the oil collecting plate (41).

2. The oil leakage recovery device for an air compressor according to claim 1, characterized by It also includes a pneumatic oil injection mechanism (5) that draws the oil in the oil collection tank (42) back into the compressor body (1) through the air pressure difference during the intake stage. The pneumatic oil injection mechanism (5) is located between the oil collection tank (42) and the compressor body (1). The pneumatic oil injection mechanism (5) includes an oil delivery pipe (51) for delivering the oil in the oil collection tank (42) and an oil injection nozzle (52) that injects the oil in the oil collection tank (42) into the compressor body (1) through the air pressure difference. One end of the oil delivery pipe (51) is connected to the oil collection tank (42), and the other end of the oil delivery pipe (51) is connected to the oil injection nozzle (52). The oil injection nozzle (52) is installed inside the compressor body (1).

3. The oil leakage recovery device for an air compressor according to claim 2, characterized in that, A one-way valve is installed inside the oil pipeline (51).

4. The oil leakage recovery device for an air compressor according to claim 1, characterized in that, The motor (2) is provided with an oil seal (3) to prevent oil from entering the motor (2). The oil seal (3) is sleeved on the output shaft of the motor (2) and located between the output shaft of the motor (2) and the housing of the motor (2).

5. The oil leakage recovery device for an air compressor according to claim 1, characterized in that, A filter plate (8) is provided at the oil inlet (421), and the size of the oil inlet (421) is larger than the size of the oil outlet (411).

6. The oil leakage recovery device for an air compressor according to claim 3, characterized in that, The oil pipeline (51) is connected to the oil collection tank (42) with a filter cotton.

7. The oil leakage recovery device for an air compressor according to claim 1, characterized in that, The compressor body (1) is provided with an oil-gas separator (6) on the side away from the motor (2), and the compressor body (1) is connected to the oil-gas separator (6).

8. The oil leakage recovery device for an air compressor according to claim 7, characterized in that, The oil collection tank (42) is provided with an installation plate (7) on the side away from the oil collection plate (41), and the motor (2), oil collection tank (42), compressor body (1) and oil-gas separator (6) are all installed on the installation plate (7).

9. The oil leakage recovery device for an air compressor according to claim 8, characterized in that, The motor (2) is slidably mounted on the mounting plate (7).

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