Oil-gas separation filter element with high oil return efficiency

Abstract

The utility model discloses an oil-gas separation filter core of high -efficient oil return belongs to oil-gas separation filter cleaner technical field. The oil-gas separation filter core includes the upper flange end cover and lower end cover of opposite setting and is set between the filter material subassembly of upper flange end cover and lower end cover, and the upper and lower end of filter material subassembly is bonded with upper flange end cover and lower end cover respectively, the filter material subassembly includes first filter separation layer and second filter separation layer, and has the gap between first filter separation layer and second filter separation layer, the upper flange end cover is installed with side oil return pipe, and the side oil return pipe is inserted into the gap between first filter separation layer and second filter separation layer and is close to lower end cover. The utility model discloses an oil-gas separation filter core through setting side oil return pipe, makes it can return oil with middle part oil return pipe simultaneously, has improved the oil return efficiency of filter core greatly, avoids the risk of oil running that the lubricating oil of accumulated oil return pipe blockage and poor oil return is taken away by airflow, effectively prolongs the service life of filter cleaner.

Description

Technical Field

[0001] This utility model relates to the field of oil-gas separator filter technology, specifically to a high-efficiency oil-gas separator filter element with oil return capability. Background Technology

[0002] Oil-gas separator filter elements are devices that separate gas from lubricating oil to ensure the normal operation of the lubrication system. They are widely used in solid-liquid, gas-solid, and gas-liquid separation and purification in fields such as petroleum, chemical, metallurgy, aviation, electronics, power, pharmaceutical, environmental protection, atomic energy, nuclear industry, natural gas, refractory materials, and fire-fighting equipment.

[0003] Traditional air compressor oil-gas separator filters separate oil and gas mixtures. As the air compressor continues to run, a large amount of filtered and precipitated oil accumulates in the groove of the lower end cover of the oil-gas separator filter. This filtered and precipitated oil is usually returned through the central oil return pipe installed in the center of the filter element. Such an oil return device is prone to increased exhaust oil content due to improper installation of the oil return pipe or excessive distance between the lower end of the oil return pipe and the groove of the lower end cover. At the same time, the oil return efficiency is slow, and poor oil return after the oil return pipe is blocked results in high exhaust oil content, causing the oil-gas separator filter to fail and become blocked, which in turn causes the air compressor's safety valve to explode.

[0004] In view of this, it is essential to develop an oil-gas separation filter element that can effectively improve oil return efficiency and reduce the risk of poor oil return due to blockage of the oil return pipe. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide an oil-gas separation filter element. This oil-gas separation filter element is equipped with a side oil return pipe, which enables it to return oil simultaneously with the central oil return pipe. This greatly improves the oil return efficiency of the filter element, avoids the risk of oil leakage caused by poor oil return due to blockage of the oil return pipe, and effectively extends the service life of the filter.

[0006] To solve the above problems, the technical solution adopted by this utility model is as follows: A high-efficiency oil-gas separator filter element with oil return capability includes an upper flange end cap and a lower end cap disposed opposite to each other, and a filter media assembly disposed between the upper flange end cap and the lower end cap. The upper and lower ends of the filter media assembly are respectively bonded to the upper flange end cap and the lower end cap. The filter media assembly includes a first filter separation layer and a second filter separation layer disposed sequentially from the air inlet side to the air outlet side, with a gap between the first filter separation layer and the second filter separation layer. A side oil return pipe is installed on the upper flange end cap, and the side oil return pipe extends into the gap between the first filter separation layer and the second filter separation layer and is close to the lower end cap.

[0007] In a preferred embodiment of this utility model, an external nut is welded to the side of the upper flange end cover away from the filter media assembly; the upper end of the side return oil pipe passes through the upper flange end cover and is threadedly connected to the external nut.

[0008] In a preferred embodiment of this utility model, the width of the gap between the first filter separation layer and the second filter separation layer is greater than 20mm.

[0009] In a preferred embodiment of this utility model, the lower end of the side return oil pipe has an inclined opening.

[0010] In a preferred embodiment of this utility model, the upper flange end cover includes a suspension part, a connecting part, an injection part, and an anti-adhesion part connected in sequence. The suspension part and the injection part are arranged horizontally, and the connecting part and the anti-adhesion part are arranged vertically. The side return oil pipe is installed on the injection part.

[0011] In a preferred embodiment of the present invention, the lower end cover includes a circular annular retaining edge, an adhesive injection groove, and an oil storage groove arranged sequentially from the outside to the inside, wherein the circular annular retaining edge, the adhesive injection groove, and the oil storage groove are integrally stamped.

[0012] In a preferred embodiment of the present invention, the first filter separation layer includes an outer support mesh, a first glass fiber filter paper layer, and a first middle support mesh arranged sequentially from the air inlet side to the air outlet side.

[0013] In a preferred embodiment of the present invention, the second filtration separation layer includes a second glass fiber filter paper layer, a second middle support mesh, a coagulation and flow guiding cotton layer, and an inner support mesh arranged sequentially from the air inlet side to the air outlet side.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model's oil-gas separator filter element improves the oil return efficiency of the filter element by installing a side return oil pipe in the gap between the first and second filter separation layers of the filter material assembly. The filter element is installed behind the oil-gas separator, and the side return oil pipe and the middle return oil pipe of the cover plate return oil simultaneously. This effectively reduces the oil content in the exhaust gas and avoids the risk of oil leakage caused by blockage of the middle return oil pipe and poor oil return, which would result in the accumulated lubricating oil being carried away by the airflow. This effectively extends the service life of the filter and helps to improve the market competitiveness and brand influence of the filter product. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the high-efficiency oil-gas separation filter element for oil return according to this utility model; Figure 2 This is a schematic diagram of the structure of the upper flange end cover of this utility model with a side return oil pipe installed; Figure 3This diagram shows the positional relationship between the high-efficiency oil-gas separator filter element of this utility model installed after the oil-gas tank and the middle oil return pipe. Reference numerals: 1. Upper flange end cap; 11. Suspension part; 12. Connecting part; 13. Glue injection part; 14. Glue blocking part; 2. Lower end cap; 21. Circular retaining edge; 22. Glue injection groove; 23. Oil storage groove; 3. First filter separation layer; 31. Outer support mesh; 32. First glass fiber filter paper layer; 33. First middle support mesh; 4. Second filter separation layer; 41. Second glass fiber filter paper layer; 42. Second middle support mesh; 43. Coagulated guide cotton layer; 44. Inner support mesh; 5. Side oil return pipe; 6. External nut; 7. Middle oil return pipe. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] like Figure 1 As shown, the high-efficiency oil-gas separation filter element for oil return provided by this utility model includes an upper flange end cap 1 and a lower end cap 2 arranged opposite to each other, and a filter media assembly disposed between the upper flange end cap 1 and the lower end cap 2. The upper flange end cap 1 is bonded to the upper end of the filter media assembly, used to suspend the filter in the oil-gas tank and seal the upper end of the filter media assembly. The lower end cap 2 is bonded to the lower end of the filter media assembly to seal the lower end of the filter media assembly and provide storage space for the lubricating oil condensed in the filter. Specifically, the filter media assembly includes a first filter separation layer 3 and a second filter separation layer 4 arranged sequentially from the air inlet side to the air outlet side. There is a gap between the first filter separation layer 3 and the second filter separation layer 4, which is conducive to the sedimentation of oil droplets. A side oil return pipe 5 is installed on the upper flange end cap 1. The side oil return pipe 5 extends into the gap between the first filter separation layer 3 and the second filter separation layer 4 and is close to the lower end cap 2, used to suck away the lubricating oil accumulated in the gap between the first filter separation layer 3 and the second filter separation layer 4. As can be seen from the above scheme, this utility model, by installing a side return oil pipe 5 in the gap between the first filter separation layer 3 and the second filter separation layer 4 of the filter material assembly, and having the filter element installed in the oil-gas tank, allows the side return oil pipe 5 and the middle return oil pipe 7 of the cover plate to return oil simultaneously, which greatly improves the oil return efficiency of the filter element, effectively reduces the oil content in the exhaust gas, and effectively avoids the risk of oil leakage caused by the accumulation of lubricating oil being carried away by the airflow due to blockage of the middle return oil pipe 7 and poor oil return, thus effectively extending the service life of the filter.

[0018] like Figure 2As shown, specifically, the upper flange end cover 1 includes a suspension part 11, a connecting part 12, an injection part 13, and an adhesive blocking part 14 connected in sequence. The suspension part 11 and the injection part 13 are horizontally arranged, while the connecting part 12 and the adhesive blocking part 14 are vertically arranged. The injection part 13 has a through hole for the side return oil pipe 5 to pass through. An external nut 6 is welded to the side of the upper flange end cover 1 away from the filter media assembly, corresponding to the position of the through hole. The external nut 6 is coaxially arranged with the through hole. The upper end of the side return oil pipe 5 is provided with an external thread. After passing through the through hole of the upper flange end cover 1, the upper end of the side return oil pipe 5 is threaded to the external nut 6. The external nut 6 can be externally connected to the return oil channel pipeline on the machine. In some embodiments, in order to improve the return oil efficiency of the side return oil pipe 5, the lower end of the side return oil pipe 5 is an inclined opening, so that the side return oil pipe 5 can abut against the lower end cover 2, which can both absorb the accumulated lubricating oil in the gap as much as possible and ensure the return oil efficiency. Preferably, the side return oil pipe 5 is a vertical I-shaped pipe made of copper or stainless steel with a diameter of Ø6 or Ø8. In some embodiments, the width of the gap between the first filter separation layer 3 and the second filter separation layer 4 is greater than 20 mm, which is beneficial for the insertion of the side return oil pipe 5 and the settling of oil droplets.

[0019] Specifically, the first filtration separation layer 3 includes an outer support mesh 31, a first glass fiber filter paper layer 32, and a first middle support mesh 33 arranged sequentially from the air inlet side to the air outlet side. The outer support mesh 31 is a galvanized material with an Ø8 perforated plate mesh, used to protect the entire filter element; the first middle support mesh 33 is a galvanized material with an Ø5 perforated plate mesh; the first glass fiber filter paper layer 32 is disposed between the outer support mesh 31 and the first middle support mesh 33, and plays a role in coalescing and separating micro-oil droplets in the oil-gas mixture. The second filtration separation layer 4 includes a second glass fiber filter paper layer 41, a second middle support mesh 42, a condensation guide cotton layer 43, and an inner support mesh 44 arranged sequentially from the air inlet side to the air outlet side. The second glass fiber filter paper layer 41 is used to coalesce and separate residual micro oil droplets in the airflow; the second intermediate support mesh 42 is a galvanized circular perforated plate mesh with an Ø5 aperture, which serves as the support skeleton for the second glass fiber filter paper layer 41; the function of the coagulation and flow guiding cotton layer 43 is to capture and guide the large liquid oil droplets that have coalesced and separated from the second glass fiber filter paper layer 41 to the bottom; the inner support mesh 44 is a galvanized diamond-shaped perforated plate mesh, which serves as the support skeleton for the coagulation and flow guiding cotton layer 43.

[0020] Specifically, the lower end cover 2 includes a circular annular retaining edge 21, an adhesive injection groove 22, and an oil storage groove 23 arranged sequentially from the outside to the inside. These three components are integrally stamped. The circular annular retaining edge 21 connects to the filter media assembly and provides a sealing and fixing function. The adhesive injection groove 22 accommodates the adhesive. The oil storage groove 23 is recessed to the outer side of the lower end cover 2, creating an oil storage space within the filter element. This allows extremely small oil droplets in the filtered airflow to collect in the oil storage space and ultimately be drawn away by the central oil return pipe 7.

[0021] like Figure 3 As shown, the present invention is installed in the middle of the oil-gas separator, with the return oil pipe 7 extending from the cover plate into the filter element and located in the oil storage groove 23 of the lower end cover 2. The air intake direction of the oil-gas separator filter element is from the outside to the inside. The oil-gas mixture containing micro oil droplets with relatively large particle diameters first passes through the outer support mesh 31 and then passes through the coalescence separation of the first glass fiber filter material layer, so that most of the micro oil droplets are captured and separated. The separated oil droplets settle to the bottom of the lower end cover 2 under gravity and are stored in the gap between the first filter separation layer 3 and the second filter separation layer 4. At this time, the side return oil pipe 5 sucks away most of the settled lubricating oil, effectively reducing the oil return burden of the middle return oil pipe 7 and reducing the amount of lubricating oil pushed to the second filter separation layer 4 by the airflow, thereby reducing the load on the second filter separation layer 4 and improving the overall separation efficiency and oil return efficiency of the filter element. After being filtered by the first filter separation layer 3, a small amount of micro oil droplets remain in the airflow. Driven by the airflow, they continue to flow into the inside of the filter element. After being separated by the second filter separation layer 4, the micro oil droplets coalesce into large oil droplets, which are captured by the coagulation and guiding cotton layer 43. Finally, they settle to the oil storage groove 23 of the lower end cover 2 under gravity and are sucked away by the middle oil return pipe 7 and pumped to the main unit for circulation.

[0022] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A high-efficiency oil-gas separation filter element for oil return, characterized in that: The device includes an upper flange end cap and a lower end cap arranged opposite to each other, and a filter media assembly disposed between the upper flange end cap and the lower end cap. The upper and lower ends of the filter media assembly are respectively bonded to the upper flange end cap and the lower end cap. The filter media assembly includes a first filter separation layer and a second filter separation layer arranged sequentially from the air inlet side to the air outlet side, with a gap between the first filter separation layer and the second filter separation layer. A side return oil pipe is installed on the upper flange end cap, and the side return oil pipe extends into the gap between the first filter separation layer and the second filter separation layer and is close to the lower end cap.

2. The high-efficiency oil-gas separation filter element for oil return according to claim 1, characterized in that: An external nut is welded to the side of the upper flange end cover away from the filter media assembly; the upper end of the side return oil pipe passes through the upper flange end cover and is threadedly connected to the external nut.

3. The high-efficiency oil-gas separation filter element for oil return according to claim 1 or 2, characterized in that: The width of the gap between the first filter separation layer and the second filter separation layer is greater than 20 mm.

4. The high-efficiency oil-gas separation filter element for oil return according to claim 1 or 2, characterized in that: The lower end of the side return oil pipe has an inclined opening.

5. The high-efficiency oil-gas separation filter element for oil return according to claim 1 or 2, characterized in that: The upper flange end cover includes a suspension part, a connecting part, an adhesive injection part, and an adhesive blocking part connected in sequence. The suspension part and the adhesive injection part are arranged horizontally, and the connecting part and the adhesive blocking part are arranged vertically. The side return oil pipe is installed on the adhesive injection part.

6. The high-efficiency oil-gas separation filter element for oil return according to claim 1 or 2, characterized in that: The lower end cap includes a circular retaining edge, an adhesive injection groove, and an oil storage groove arranged sequentially from the outside to the inside. The circular retaining edge, the adhesive injection groove, and the oil storage groove are integrally stamped.

7. The high-efficiency oil-gas separation filter element for oil return according to claim 1 or 2, characterized in that: The first filter separation layer includes an outer support mesh, a first glass fiber filter paper layer, and a first middle support mesh arranged sequentially from the air inlet side to the air outlet side.

8. The high-efficiency oil-gas separation filter element for oil return according to claim 1 or 2, characterized in that: The second filtration separation layer includes a second glass fiber filter paper layer, a second middle support mesh, a coagulation and flow guiding cotton layer, and an inner support mesh arranged sequentially from the air inlet side to the air outlet side.

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