Air compressor and oil seal return oil filtering device

Abstract

The utility model discloses an air compressor and an oil seal return oil filtering device, relates to the technical field of compressors, and aims to solve the problem that the oil seal needs to be disassembled for maintenance when leaking oil, the device comprises an oil return channel communicated with the lowest end of the oil seal, and the input end of an oil filtering device is communicated with the oil return channel. Oil leaked from the oil seal is introduced into the oil filter device, the oil filter device is used for filtering and storing the oil, the oil led out from the oil seal is filtered thoroughly through the oil filter device, the output end of the oil filter device is communicated with the air inlet end of the air compressor main machine, the air inlet end is in a negative pressure state, and the oil filtered thoroughly through the oil filter device can be recycled to the air compressor main machine. The air filter device communicated with the air is arranged on the oil filter device, the air entering the oil filter device is filtered through the air filter device, so that the air entering the main machine of the air compressor does not contain impurities, the whole maintenance process can be realized without disassembling the air compressor, the maintenance cost is reduced, the disassembly and maintenance times are reduced, and the service life of the air compressor is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, and more specifically to an air compressor and an oil seal return oil filtering device. Background Art

[0002] There is a gearbox inside the air compressor, which contains the main shaft, shaft seal, oil seal, etc. The main shaft is frictionally sealed with the oil seal when rotating at high speed, so it is easy to wear when rotating, and coupled with the internal pressure, it is easy to cause oil leakage over time.

[0003] If an existing air compressor leaks oil, it needs to be repaired. If the air compressor is not repaired, the service life of the air compressor will be shortened. However, if the air compressor is repaired, it is necessary to disassemble the air compressor, which is cumbersome and wastes manpower.

[0004] Therefore, how to solve the problem of needing to dismantle the machine for repair when the oil seal leaks is a problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide an oil seal return oil filtering device, when the oil seal leaks oil, it can be repaired without disassembling the machine, so as to extend the service life of the air compressor.

[0006] Another object of the utility model is to provide an air compressor comprising the oil seal return oil filter device, which can realize automatic maintenance of the air compressor with oil leakage without disassembling the machine.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] An oil seal return oil filtering device, comprising:

[0009] An oil return passage, connected to the lowest end of the oil seal;

[0010] An oil filter device, the input end of the oil filter device is connected to the oil return channel, the oil filter device is used to filter and store oil, the output end of the oil filter device is connected to the air inlet end of the air compressor host, the air inlet end is in a negative pressure state, and the oil filter device is provided with an air filter device connected to the air, and the air filter device is used to filter the air entering the oil filter device.

[0011] Preferably, the oil filter device comprises:

[0012] An oil filter bottle body, the top of which is provided with an oil filter seat;

[0013] The filter core group is arranged in the inner cavity of the oil filter bottle body, the top of the filter core group is in contact with the oil filter seat, and the filter core group is used for filtering oil impurities.

[0014] Preferably, the oil filter seat is provided with an oil inlet channel and an air inlet channel, the oil inlet of the oil inlet channel is connected with the oil outlet of the oil return channel, the oil outlet of the oil inlet channel is located between the filter element group and the oil filter bottle body, the air inlet of the air inlet channel is connected with the air filter device, and the air outlet of the air inlet channel is located between the filter element group and the oil filter bottle body.

[0015] Preferably, an oil return pipe is provided in the filter core group, and the oil filter seat is provided with a mounting hole for mounting the oil return pipe, and the oil outlet end of the oil return pipe is connected to the air inlet end of the air compressor host.

[0016] Preferably, the oil inlet end of the oil return pipe is in contact with the bottom end of the filter element group, and the oil inlet end of the oil return pipe is an inclined end surface with an inclination.

[0017] Preferably, the air filter device has an air filter element, an air inlet of the air filter element is connected to the air, and an air outlet of the air filter element is connected to the air inlet of the air inlet passage.

[0018] Preferably, a one-way valve is provided at the air inlet end of the air compressor main unit, and the one-way valve is connected to the air inlet end of the air compressor main unit via an adapter.

[0019] Preferably, a ball valve is provided at one end of the one-way valve, and the ball valve is connected to the oil outlet end of the oil return pipe.

[0020] Preferably, the oil return channel is a sloped pipe, and the inclination angle of the oil return channel is 30 degrees to 45 degrees.

[0021] An air compressor, characterized in that it comprises the oil seal return oil filter device described in any one of the above items, the air compressor comprises a controller, the controller is connected to the ball valve, and a liquid level detector connected to the controller is provided in the oil filter bottle.

[0022] The oil return filter device of the utility model comprises an oil return channel and an oil filter device. Specifically, the oil return channel is connected with the lowest end of the oil seal, and the input end of the oil filter device is connected with the oil return channel. By setting the oil return channel, the oil leaked from the oil seal is introduced into the oil filter device. The oil filter device is used to filter and store the oil. The oil drawn out from the oil seal is filtered cleanly by the oil filter device. The output end of the oil filter device is connected with the air inlet end of the air compressor main engine. The air inlet end is in a negative pressure state, and the oil filtered cleanly by the oil filter device can be sucked out to the air compressor main engine. The oil filter device is provided with an air filter device connected with the air. The air entering the oil filter device is filtered by the air filter device, so that the air entering the air compressor main engine is free of impurities.

[0023] When the air inlet end is connected to the oil filter device, the oil leakage generated by the oil seal can be filtered through the oil filter device, and the filtered oil is sucked into the air compressor host under the negative pressure state of the air inlet end to realize the recycling of the leaked oil. When the air inlet end is disconnected from the oil filter device, the oil leakage generated by the oil seal can flow into the oil filter device, and the leaked oil can be temporarily stored through the oil filter device. When the air inlet end is connected to the oil filter device, the leaked oil can be filtered and absorbed.

[0024] The oil seal return oil filter device arranged in the above manner can be implemented without disassembling the machine during the entire maintenance process, thereby reducing maintenance costs, reducing the number of disassembly maintenance times, and thus extending the service life of the air compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0026] Figure 1 This is a schematic diagram of the installation structure of the oil seal return oil filter device provided by the utility model;

[0027] Figure 2 This is an installation cross-sectional view of the oil seal return oil filter device provided by the utility model.

[0028] Reference numerals:

[0029] 1-Oil return channel;

[0030] 2-oil filter device, 21-oil filter bottle, 22-oil filter seat, 23-filter element group;

[0031] 3- Air filter device;

[0032] 4-Oil return pipe;

[0033] 5- One-way valve;

[0034] 6-Ball valve. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] The core of the utility model is to provide an oil seal return oil filtering device. When the oil seal leaks oil, it can be repaired without disassembling the machine, so as to extend the service life of the air compressor.

[0037] Another core of the utility model is to provide an air compressor including the oil seal return oil filter device, which can realize automatic maintenance of the air compressor with oil leakage without disassembling the machine.

[0038] Please refer to Figure 1 and Figure 2 An oil seal return oil filter device includes an oil return channel 1 and an oil filter device 2.

[0039] Specifically, the oil return channel 1 is connected to the lowest end of the oil seal, and the input end of the oil filter device 2 is connected to the oil return channel 1. By setting the oil return channel 1, the oil leaked from the oil seal is introduced into the oil filter device 2. The oil filter device 2 is used to filter and store oil. The oil drawn out from the oil seal is filtered cleanly by the oil filter device 2. The output end of the oil filter device 2 is connected to the air inlet end of the air compressor main engine. The air inlet end is in a negative pressure state, and the oil filtered clean by the oil filter device 2 can be sucked out to the air compressor main engine. The oil filter device 2 is provided with an air filter device 3 connected to the air. The air entering the oil filter device 2 is filtered by the air filter device 3 to ensure that the air entering the air compressor main engine is free of impurities.

[0040] When the air intake end is connected to the oil filter device 2, the oil leakage generated by the oil seal can be filtered through the oil filter device 2, and the filtered oil is sucked into the air compressor main unit under the negative pressure state of the air intake end to realize the recycling of the leaked oil. When the air intake end is disconnected from the oil filter device 2, the oil leakage generated by the oil seal can flow into the oil filter device 2, and the leaked oil can be temporarily stored through the oil filter device 2. When the air intake end is connected to the oil filter device 2, the leaked oil can be filtered and absorbed.

[0041] The oil seal return oil filter device arranged in the above manner can be implemented without disassembling the machine during the entire maintenance process, thereby reducing maintenance costs, reducing the number of disassembly maintenance times, and thus extending the service life of the air compressor.

[0042] The oil seal return oil filter device arranged in the above manner can solve the problem of oil leakage of the air compressor main shaft by adding an oil seal return oil filter device. The leaking oil seal can be repaired without disassembling the machine, thereby reducing the number of times the machine is disassembled and increasing the service life of the air compressor.

[0043] In the above embodiment, the oil filter device 2 includes an oil filter bottle body 21 and a filter core group 23. An oil filter seat 22 is provided on the top of the oil filter bottle body 21 to seal the oil filter bottle body 21 from the outside and prevent external impurities from entering the oil filter bottle body 21. The filter core group 23 is provided in the inner cavity of the oil filter bottle body 21, and the top of the filter core group 23 is abutted against the oil filter seat 22. The filter core group 23 is used to filter oil impurities.

[0044] It should be noted that the leaked oil entering the oil filter bottle 21 is filtered through the filter core group 23. The top of the filter core group 23 is in contact with the oil filter seat 22 on the top of the oil filter bottle 21 to ensure that the leaked oil with impurities will not enter the filter core group 23. The leaked oil in the filter core group 23 is all clean oil after filtering. It can also be ensured that the clean oil filtered in the filter core group 23 can be sucked out to the air compressor host under the negative pressure at the air inlet end.

[0045] When the air inlet end is connected to the oil filter device 2, the oil leakage generated by the oil seal can be filtered through the filter core group 23, and the filtered oil is sucked into the air compressor main unit under the negative pressure state of the air inlet end to realize the recycling of the leaked oil. When the air inlet end is disconnected from the oil filter device 2, the oil leakage generated by the oil seal can flow into the oil filter bottle body 21, and the leaked oil can be temporarily stored through the oil filter bottle body 21. When the air inlet end is connected to the oil filter device 2, it is filtered through the filter core group 23, and the clean oil after filtering is absorbed.

[0046] Among them, in this embodiment, the oil filter device 2 is configured in this way, but in practical applications, there is no limitation to this, and it can also be configured as other structures as long as the above technical effects can be achieved.

[0047] In the above situation, the oil filter seat 22 is provided with an oil inlet channel and an air inlet channel. The oil inlet of the oil inlet channel is connected with the oil outlet of the return oil channel 1, and the oil outlet of the oil inlet channel is located between the filter element group 23 and the oil filter bottle body 21. The air inlet of the air inlet channel is connected with the air filter device 3, and the air outlet of the air inlet channel is located between the filter element group 23 and the oil filter bottle body 21.

[0048] It can be understood that the leaked oil of the oil seal flows into the oil inlet channel from the oil outlet of the return oil channel 1 through the return oil channel 1, and flows out from the oil outlet of the oil inlet channel after passing through the oil inlet channel. Because the filter element group 23 is nested in the oil filter bottle body 21, an empty interlayer will be formed between the filter element group 23 and the oil filter bottle body 21, so that the leaked oil with impurities flows into the empty interlayer between the filter element group 23 and the oil filter bottle body 21, and then is filtered by the filter element group 23, and the impurities are left in the empty interlayer between the filter element group 23 and the oil filter bottle body 21. The filter element group 23 contains clean oil after filtering. Under the negative pressure control of the air intake end, the filtered oil is sucked into the air compressor host.

[0049] Among them, under the negative pressure control of the air intake end, air enters the air filter device 3, the filtered air enters from the air inlet of the air intake channel, is discharged from the air outlet of the air intake channel to the empty interlayer between the filter core group 23 and the oil filter bottle body 21, and finally enters the air compressor main unit from the oil filter bottle body 21.

[0050] Furthermore, an oil return pipe 4 is provided in the filter core group 23, and a mounting hole for mounting the oil return pipe 4 is provided in the oil filter seat 22, and an oil outlet end of the oil return pipe 4 is connected to an air inlet end of the air compressor main engine.

[0051] It should be noted that, through the negative pressure control at the air inlet end, the oil filtered in the filter core group 23 is sucked into the air compressor main unit through the oil return pipe 4 to achieve oil recycling. The air filtered by the air filter device 3 is sucked into the air compressor main unit through the air inlet channel and the oil return pipe 4 to ensure that the air entering the air compressor main unit is free of impurities.

[0052] The diameter of the oil return pipe 4 is 6 mm, but in practical applications, there is no restriction on the diameter of the oil return pipe 4 .

[0053] In the above embodiment, the oil inlet end of the oil return pipe 4 is in contact with the bottom end of the filter element group 23 , and the oil inlet end of the oil return pipe 4 is an inclined end surface with an inclination.

[0054] It can be understood that, in one embodiment, the oil inlet end of the return oil pipe 4 is directly inserted into the bottom end of the filter element group 23. If the oil inlet end of the return oil pipe 4 is a horizontal end face, then under the negative pressure control of the air inlet end, the oil inlet end of the return oil pipe 4 and the bottom end of the filter element group 23 will be sucked tightly, resulting in the oil filtered in the filter element group 23 not being sucked out. Therefore, it is necessary to set the end face of the oil inlet end as an inclined end face with an inclination, so that the oil filtered in the filter element group 23 can be smoothly sucked out from the oil inlet end under the negative pressure control of the air inlet end, thereby realizing the recycling of leaked oil.

[0055] When the equipment stops running, the oil leakage will not stop, and the oil can be retained in the oil filter bottle 21. When the equipment is turned on, the air compressor host generates negative pressure and the oil is sucked away through the oil return pipe 4.

[0056] Among them, in this embodiment, the oil inlet end of the oil return pipe 4 is a horizontal end surface, and can also be set to be serrated. In practical applications, there is no limitation to this, as long as the above technical effects can be achieved.

[0057] On the basis of the above-mentioned embodiment, the air filter device 3 has an air filter element, the air inlet of the air filter element is connected to the air, and the air outlet of the air filter element is connected to the air inlet of the air intake passage.

[0058] It should be noted that the air entering the air filter device 3 is filtered through the air filter element, so that the air entering the oil filter bottle body 21 is free of impurities. Under the negative pressure control of the air intake end, the filtered air in the oil filter bottle body 21 is sucked out from the oil return pipe 4.

[0059] In this embodiment, the air filter element is filter paper, which is installed in the air filter bottle to filter the gas passing through the air filter bottle. The air filter element can also be other structures such as filter screen, which is not limited to this.

[0060] There is no restriction on the structure and specifications of the air filter device 3 as long as the above technical effects can be achieved.

[0061] In the above embodiment, a one-way valve 5 is provided at the air inlet end of the air compressor main engine, and the one-way valve 5 is connected to the air inlet end of the air compressor main engine through an adapter.

[0062] It is understandable that the purpose of the one-way valve 5 is to prevent the air compressor main engine from having a reverse rotation when the equipment stops, and the screw has a recoil effect to prevent oil from flowing back.

[0063] In the above situation, a ball valve 6 is provided at one end of the one-way valve 5 , and the ball valve 6 is connected to the oil outlet end of the oil return pipe 4 .

[0064] It should be noted that when the equipment leaks oil, the ball valve 6 is manually opened to allow the oil return pipe 4 to start absorbing oil. If there is no oil leakage, the ball valve 6 is manually closed.

[0065] As a preferred embodiment, the oil return channel 1 is a pipe with an inclination, and the inclination angle of the oil return channel 1 is 30 degrees to 45 degrees.

[0066] It can be understood that setting the return oil channel 1 as a pipe with an inclined angle can allow the leaked oil from the oil seal to flow smoothly into the oil filter bottle body 21. The inclination angle of the return oil channel 1 is preferably 30 degrees to 45 degrees. However, in actual applications, there is no limitation on the inclination angle of the return oil channel 1 as long as the above-mentioned technical effect can be achieved.

[0067] When installing the device on the air compressor, first install the oil filter device 2 on the interface of the air compressor host through the adapter, then install the air filter device 3 on the oil filter device 2, further install the one-way valve 5 and the ball valve 6 on the air inlet port of the air compressor host, and finally install the return oil pipe 4, insert the inclined end face of the return oil pipe 4 into the oil filter device 2, and connect the other end of the return oil pipe 4 with the ball valve 6. The connection between the components is threaded, and anaerobic adhesive is used to seal the threaded connection. However, in actual application, there is no restriction on the connection method of the components.

[0068] An air compressor includes the above-mentioned oil seal return oil filtering device. The air compressor includes a controller, which is connected to the ball valve 6. A liquid level detector connected to the controller is provided in the oil filter bottle 21.

[0069] It should be noted that, in one embodiment, a liquid level detector connected to a controller is provided in the oil filter bottle 21 to realize automatic absorption of leaked oil. When the liquid level detector detects oil leakage in the oil filter bottle 21, a signal is sent to the controller. The controller controls the ball valve 6 to open, and under the negative pressure control at the air inlet end, the filtered oil in the oil filter bottle 21 is sucked into the air compressor main unit from the oil return pipe 4.

[0070] Among them, there is no restriction on the installation position and number of the liquid level detector. When the liquid level detector is installed at a position close to the oil filter seat 22 of the oil filter bottle 21, the opening time of the ball valve 6 can be preset on the controller to realize the absorption of the leaked oil. The liquid level detectors can also be respectively arranged at the high and low positions of the oil filter bottle 21. When the high-position detector detects the oil leakage, it sends a signal to the controller, and the controller controls the ball valve 6 to open. When the leaked oil in the oil filter bottle 21 is sucked to the detection position of the low-position detector, the low-position detector sends a signal to the controller, and the controller controls the ball valve 6 to close.

[0071] In summary, the oil seal return filter device provided by the utility model has a friction seal with the oil seal when the main shaft rotates at high speed, which is very easy to wear when rotating. Coupled with the internal pressure, it is easy to cause oil leakage in the long run. For this reason, an oil return channel 1 is designed at the bottom of the oil seal. The leaked oil flows to the oil filter bottle 21 through the oil return channel 1, and then passes through the filter element group 23 to play a filtering role. After filtering, the oil is sucked out through the oil return pipe 4. The air filter device 3 is connected to the oil filter device 2. Filter paper and an air inlet are provided on the air filter device 3. The filtered air enters the interior of the oil filter device 2. The interior of the compressor requires absolute cleanliness, so multiple impurities need to be filtered. Existing equipment needs to be repaired when it leaks oil, but by providing the device of the present invention, the number of repairs can be reduced and the service life of the equipment can be extended.

[0072] In addition to the oil seal return oil filter device disclosed in the above embodiments, the utility model also provides an air compressor including the above oil seal return oil filter device. For the structures of other parts of the air compressor, please refer to the prior art and will not be described in detail herein.

[0073] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0074] The above is a detailed introduction to an air compressor and an oil seal return oil filter device provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiment is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. An oil seal return oil filter device, characterized in that: include: An oil return passage (1) connected to the lowest end of the oil seal; An oil filter device (2), wherein an input end of the oil filter device (2) is connected to the oil return channel (1), the oil filter device (2) is used to filter and store oil, an output end of the oil filter device (2) is connected to an air inlet end of an air compressor main engine, the air inlet end is in a negative pressure state, and an air filter device (3) connected to air is provided on the oil filter device (2), the air filter device (3) is used to filter air entering the oil filter device (2).

2. The oil seal return oil filter device according to claim 1, characterized in that: The oil filter device (2) comprises: An oil filter bottle body (21), wherein an oil filter seat (22) is provided on the top of the oil filter bottle body (21); The filter core group (23) is arranged in the inner cavity of the oil filter bottle body (21); the top of the filter core group (23) abuts against the oil filter seat (22); and the filter core group (23) is used to filter oil impurities.

3. The oil seal return oil filter device according to claim 2, characterized in that: The oil filter seat (22) is provided with an oil inlet channel and an air inlet channel, the oil inlet of the oil inlet channel is communicated with the oil outlet of the oil return channel (1), the oil outlet of the oil inlet channel is located between the filter element group (23) and the oil filter bottle body (21), the air inlet of the air inlet channel is communicated with the air filter device (3), and the air outlet of the air inlet channel is located between the filter element group (23) and the oil filter bottle body (21).

4. The oil seal return oil filter device according to claim 3 is characterized in that: An oil return pipe (4) is provided in the filter core group (23), and a mounting hole for mounting the oil return pipe (4) is provided in the oil filter seat (22); an oil outlet end of the oil return pipe (4) is connected to an air inlet end of the air compressor main engine.

5. The oil seal return oil filter device according to claim 4, characterized in that: The oil inlet end of the oil return pipe (4) is in contact with the bottom end of the filter element group (23), and the oil inlet end of the oil return pipe (4) is an inclined end surface with an inclination.

6. The oil seal return oil filter device according to claim 5, characterized in that: The air filter device (3) comprises an air filter element, an air inlet of the air filter element is connected to the air, and an air outlet of the air filter element is connected to the air inlet of the air inlet passage.

7. The oil seal return oil filter device according to claim 6, characterized in that: A one-way valve (5) is provided at the air inlet end of the air compressor main unit, and the one-way valve (5) is connected to the air inlet end of the air compressor main unit via an adapter.

8. The oil seal return oil filter device according to claim 7, characterized in that: A ball valve (6) is provided at one end of the one-way valve (5), and the ball valve (6) is connected to the oil outlet end of the oil return pipe (4).

9. The oil seal return oil filter device according to claim 8, characterized in that: The oil return channel (1) is a pipe with an inclination, and the inclination angle of the oil return channel (1) is 30 degrees to 45 degrees.

10. An air compressor, characterized in that: The oil seal return oil filter device comprises the oil seal return oil filter device according to any one of claims 2 to 9, the air compressor comprises a controller, the controller is connected to the ball valve (6), and a liquid level detector connected to the controller is provided in the oil filter bottle (21).

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