High performance low pressure loss oil-gas separation filter element

Abstract

The application relates to the technical field of oil-gas separation, and particularly discloses a high-performance low-pressure-loss oil-gas separation filter core which comprises a shell, a filter assembly, an opening and closing assembly and a supporting piece. The shell is provided with a mounting cavity and an oil return pipe interface, the upper portion of the filter assembly is provided with an air inlet part which is attached to the inner wall of the shell, the dispersion port of the air inlet part is provided with rotatable guide vanes, the guide vanes are used for cyclone pre-separation of oil-gas mixture, and large-diameter oil drops are thrown to the shell wall; the bottom of the filter assembly is provided with a through port which is opposite to the oil return pipe. The filter assembly comprises an outer framework, an inner framework and a plurality of layers of filter fibers between the outer framework and the inner framework, the fibers are arranged in a cross-inclined mode from top to bottom, a guide structure is formed to reduce pressure loss. The opening and closing assembly is arranged close to the through port, filter fibers are arranged between the supporting plates, the through port can be automatically opened and closed according to pressure difference to realize emergency filter bypass. The bottom of the supporting piece is provided with a guide groove. The application has the functions of low pressure loss, long service life and automatic pressure difference protection, and can guarantee stable operation of a compression system.

Description

Technical Field

[0001] This invention relates to the field of oil-gas separator filter elements, and particularly to a high-performance, low-pressure-loss oil-gas separator filter element. Background Technology

[0002] Oil-gas separator filter elements are widely used in screw air compressors, vacuum pumps, blowers, and other fluid equipment that requires oil-gas separation. Their main function is to separate the lubricating oil mist entrained in the compressed gas, allowing the lubricating oil to be recycled and reused, and outputting clean gas, thereby ensuring the normal operation of the equipment and reducing lubricating oil consumption.

[0003] Currently, most common oil-gas separator filter elements use glass fiber filter media, coalescing filter layers, and other filtration media. The oil-gas mixture typically enters the oil-gas tank from the side and then directly enters the filter layer from the outside of the filter element. After coalescing filtration, it flows out from the center of the filter element, achieving separation of oil and gas. Although this type of structure can meet basic oil-gas separation requirements, the oil-gas mixture entering the oil-gas tank still contains a large number of large-diameter oil droplets and high-speed flowing oil mist particles. All the oil and gas directly act on the filter layer, causing the filter layer to bear a large filtration load for a long time. This not only easily causes local clogging of the filter layer, but also gradually increases the filtration resistance as oil continuously accumulates on the surface of the filter layer, leading to increased pressure drop in the filter element, decreased oil-gas separation efficiency, and shortened filter element lifespan.

[0004] Furthermore, as the filter element is used continuously, the degree of clogging in the filter layer increases, and the pressure difference across the filter element continues to rise. Existing oil-gas separator filter elements typically lack an emergency ventilation structure that can automatically open based on the pressure difference. When the pressure difference is too large, it can not only easily increase the energy consumption of the equipment, but may also cause local deformation, cracking, or even failure of the filter element, affecting the stable operation of the entire compression system. Even if some products have a bypass structure, it is usually located outside the filter element or in other positions on the oil-gas tank, and its opening pressure is difficult to directly match the clogging state of the filter element. At the same time, the bypassed gas is usually not filtered again, which can easily carry impurities into the subsequent system, affecting the reliability of equipment operation.

[0005] Based on the above problems, there is an urgent need in this field to provide an oil-gas separation filter element that can perform centrifugal pre-separation of the oil-gas mixture using a flow-guiding swirl structure before the oil and gas enter the filter element, so that larger oil droplets are preferentially thrown to the inner wall of the oil-gas tank and recovered, while reducing the oil content entering the filter element's filtration layer; and can automatically open the emergency ventilation channel through a pressure differential self-opening bypass mechanism set at the bottom of the filter element when the pressure differential increases due to filter element blockage, and the bypass channel is equipped with a filtration structure to take into account the requirements of continuous system operation, safety protection and clean ventilation. Summary of the Invention

[0006] One object of the present invention is to provide a high-performance, low-pressure-loss oil-gas separator filter element that at least solves any of the above-mentioned technical problems.

[0007] In particular, the present invention provides a high-performance, low-pressure-loss oil-gas separator filter element, including a housing having an upward-facing mounting cavity and a downward-facing return oil pipe interface; A filter assembly is disposed within the cavity of the housing, and the air inlet provided on the upper part of the filter assembly is in contact with the inner wall of the housing. The bottom of the filter assembly is provided with an opening opposite to the oil return pipe. An opening and closing component is provided, which is arranged along the axial direction of the filter component and is located near the opening at the bottom of the opening and closing component. A support member is disposed at the bottom of the filter assembly and is used to support the filter assembly.

[0008] Furthermore, the opening of the housing is provided with an internal thread for fixing the connection to the outside.

[0009] Furthermore, the filter assembly includes: a dispersion port disposed in the air intake, and a guide vane disposed within the dispersion port that rotates axially with the opening and closing assembly.

[0010] Furthermore, the filter assembly also includes an outer frame and an inner frame, with a filter section disposed between the inner frame and the outer frame, the filter section being composed of multiple layers of fiber filter material.

[0011] Furthermore, the fiber material of the filter section is arranged in a crisscrossing and inclined manner from top to bottom.

[0012] Furthermore, the guide vane may be provided with a guide groove.

[0013] Furthermore, the guide channel is a V-shaped guide channel.

[0014] Furthermore, the opening and closing assembly includes: a plurality of support plates for fixed connection with the filter assembly, wherein filter fibers are disposed between the support plates; A guide member with an opening facing downwards is provided at the lower part of the support plate, and an elastic member is provided inside the guide member; A sliding member that moves axially along the guide member, the sliding member being disposed within the guide member, with one end connected to the elastic member and the other end provided with a valve core driven by the elastic member for sealing the passage.

[0015] Furthermore, a sealing element is fitted on the outer side of the valve core.

[0016] Furthermore, the bottom of the base is provided with at least one guide groove that communicates with the opening.

[0017] The technical effects and advantages of this invention are as follows: This invention features a dispersion port at the air inlet of the upper part of the filter assembly, with guide vanes inside the dispersion port to open and close the axial rotation of the assembly. This allows the oil-gas mixture entering the filter element to undergo cyclone pre-separation before reaching the filter layer. Large-diameter oil mist particles are thrown towards the inner wall of the housing under centrifugal force and flow along the side wall to the bottom for oil return. This effectively reduces the oil content entering the filter section, lightens the filtration load on the filter layer, and avoids the local clogging problem caused by direct impact of all oil and gas on the filter layer in traditional structures. This significantly extends the service life of the filter element and reduces the overall pressure drop of the filter element, achieving low pressure loss operation.

[0018] The filter section of this invention employs a multi-layered filter fiber material arranged in a crisscrossing pattern from top to bottom, forming a natural flow channel. This structure, on the one hand, increases the flow path of the oil-gas mixture within the filter layer, improving the collision probability and interception efficiency between oil mist particles and the fibers; on the other hand, the separated oil mist particles can flow smoothly downwards and be collected under gravity along the inclined direction of the fibers, effectively preventing oil accumulation inside the filter layer and avoiding increased filtration resistance due to oil retention, further ensuring the low pressure loss characteristics of the filter element during long-term use.

[0019] This invention features an integrated opening and closing component at the bottom of the filter element, comprising a guide, an elastic element, a sliding element, and a valve core. This component automatically opens the emergency ventilation channel based on pressure difference changes caused by filter element blockage. Its opening pressure directly matches the filter element's blockage state. When the pressure difference reaches a preset value, the valve core automatically opens, allowing gas to bypass the blocked filter layer and exit. This effectively prevents localized deformation, cracking, or even failure of the filter element due to excessive pressure difference, ensuring stable operation of the compression system and continuous operation of the equipment. Simultaneously, filter fibers are installed between the support plates used to fix the guide, ensuring that when the valve core opens for emergency bypass, the bypass gas undergoes secondary filtration through the filter fibers between the support plates before flowing through the port. This structure overcomes the shortcomings of traditional external bypass structures where bypassed gas, without secondary filtration, carries impurities into subsequent systems, ensuring both system safety and the cleanliness requirements of the output gas. Attached Figure Description

[0020] The following sections will describe some specific embodiments of the invention in detail by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings: Figure 1 This is a schematic diagram of the structure of the present invention.

[0021] Figure 2This is a top view of the structure of the present invention.

[0022] Figure 3 The present invention Figure 2 Schematic diagram of cross-section along the AA direction.

[0023] Figure 4 For the present invention Figure 3 Schematic diagram of the cross-sectional structure in the middle BB direction.

[0024] Figure 5 For the present invention Figure 3 A magnified schematic diagram of the structure of C.

[0025] Figure 6 This is a schematic diagram of the filter element structure of the present invention.

[0026] Figure 7 This is a schematic diagram of the exploded structure of the present invention.

[0027] Figure 8 For the present invention Figure 7 A magnified schematic diagram of the structure of part D.

[0028] In the diagram: 1. Housing, 2. Connecting part, 201. Internal thread, 3. Filter assembly, 301. Air inlet, 302. Dispersion part, 3021. Air cup, 3022. Guide vane, 3023. Guide groove, 303. Outer frame, 304. Inner frame, 4. Port, 5. Opening and closing assembly, 501. Support plate, 502. Guide component, 503. Elastic component, 504. Sliding component, 505. Valve core, 506. Seal, 6. Support component, 601. Guide groove, 7. Filter part, 701. Filter layer, 8. Oil return pipe. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 2 This is a top view of the structure of the present invention. Figure 3 The present invention Figure 2 Schematic diagram of cross-section along the AA direction. Figure 4 For the present invention Figure 3 Schematic diagram of the cross-sectional structure in the middle BB direction. Figure 5 For the present invention Figure 3 A magnified schematic diagram of the structure of C. Figure 6This is a schematic diagram of the filter element structure of the present invention. Figure 7 This is a schematic diagram of the exploded structure of the present invention. Figure 8 For the present invention Figure 7 A magnified schematic diagram of the structure of part D.

[0031] Example 1 like Figures 1 to 3 As shown in the figure, the present invention provides a high-performance, low-pressure-loss oil-gas separation filter element, which includes a housing 1, a filter assembly 3, an opening and closing assembly 5, and a support 6.

[0032] The housing 1 has an upward-facing mounting cavity and a downward-facing oil return pipe interface 8. The mounting cavity of the housing 1 is used to accommodate the filter assembly 3 and other internal components. The oil return pipe interface 8 is used to connect to an external oil return pipe 8 so that the separated lubricating oil can be recovered to the oil pool of the oil-gas tank. The opening of the housing 1 is provided with an internal thread 201 for fixing the connection to the outside. The oil-gas separator filter element can be screwed onto the mounting base of the oil-gas tank through the internal thread 201 to achieve a fixed connection between the filter element and the oil-gas tank. At the same time, after being fixedly connected to the outside, a sealing ring is provided at the opening of the filter element of the filter assembly. The sealing ring is used to seal the opening of the filter element, thereby preventing unfiltered gas from directly passing through the filter element into the downstream pipeline, ensuring that all gas entering the oil-gas tank must be filtered by the filter element before being discharged.

[0033] The filter assembly 3 is disposed in the cavity of the housing 1, and the air inlet 301 disposed on the upper part of the filter assembly 3 is in contact with the inner wall of the housing 1. The bottom of the filter assembly 3 is provided with a port 4 opposite to the oil return pipe 8. The port 4 is used to allow the separated lubricating oil to flow downward to the oil return pipe 8.

[0034] The opening and closing component 5 is arranged along the axial direction of the filter component 3, and the opening and closing component 5 is located near the opening 4 at the bottom of the opening and closing component 5. The opening and closing component 5 is used to keep the opening 4 closed when the filter element is working normally. When the filter element is blocked and the pressure difference rises to a predetermined value, the pressure outside the filter element is greater than the pressure inside the filter element due to the continuous entry of compressed gas, so that the opening and closing component 5 can automatically open the emergency ventilation channel to ensure the continuous operation of the system.

[0035] The support member 6 is disposed at the bottom of the filter assembly 3 and is used to support the filter assembly 3. The support member 6 is fixedly connected to the bottom of the inner wall of the housing 1, providing stable axial support for the filter assembly 3 and preventing the filter assembly 3 from being displaced or deformed under gas impact.

[0036] Example 2 The difference between this embodiment and Embodiment 1 is that, as Figure 3As shown, the filter assembly 3 includes a dispersion port 302 disposed in the air inlet 301, and a guide vane is disposed in the dispersion port 302 that rotates axially with the opening and closing assembly 5.

[0037] The air inlet 301 is located on the outer ring of the filter element opening. The dispersion port 302 directly connects to the cavity formed between the filter element and the inner wall of the housing 1. After the oil-gas mixture enters the housing through the air inlet 301 and enters the dispersion port 302, it impacts the guide vanes located in the dispersion port 302. Under the impact of the oil-gas mixture, the guide vanes rotate around the axis of the opening and closing assembly 5, which equalizes and guides the incoming gas, so that the gas enters the filtration area of ​​the filter assembly 3 evenly. At the same time, large-diameter oil mist particles entrained in the oil-gas mixture are thrown towards the inner wall of the housing 1 by centrifugal force when passing through the rotating guide vanes. They flow along the side wall to the bottom of the housing 1 for preliminary oil return. Thus, the large-diameter oil droplets are pre-separated before the oil-gas mixture enters the filter section 7, which effectively reduces the filtration load of the filter section 7, extends the service life of the filter element, and reduces the overall pressure drop of the filter element.

[0038] Preferably, the guide vane 3022 is provided with a guide groove 3023, which is used to further guide the flow direction of the oil-gas mixture, improve the uniformity of the airflow and the swirling effect. More preferably, the guide groove 3023 is a V-shaped guide groove. The V-shaped structure can more effectively gather and guide the airflow, enhancing the swirling separation effect. It should be noted that the guide vane can be a fixed spiral guide vane, thereby forming a swirling flow, generating centrifugal force, and facilitating flow uniformity. It should be further noted that the wind cup 3021 part of the guide vane 3022 can be made of ceramic shaft, which can reduce friction and ensure bearing life.

[0039] Example 3 This embodiment is based on embodiment two, such as... Figure 5 As shown, the filter assembly 3 also includes an outer frame 303 and an inner frame 304, and a filter section 7 is provided between the inner frame 304 and the outer frame 303. The filter section 7 is composed of multiple layers of filter fiber material.

[0040] Both the outer skeleton 303 and the inner skeleton 304 are cylindrical structures. The outer skeleton 303 is disposed on the outside of the filter section 7 to provide radial support and protection for the filter section 7 and prevent the filter section 7 from undergoing radial deformation under gas pressure. The inner skeleton 304 is disposed on the inside of the filter section 7 to maintain the internal shape of the filter section 7 and to provide an outlet channel for the purified gas. The filter section 7 is sandwiched between the outer skeleton 303 and the inner skeleton 304 and is made of multiple layers of filter fiber material. It is used to perform fine filtration on the pre-separated oil-gas mixture and separate the residual tiny oil mist particles from the gas.

[0041] Preferably, the fiber material of the filter section 7 is arranged in a cross-inclined manner from top to bottom, that is, the filter fibers are arranged in a cross-inclined manner in the axial direction of the filter section 7 to form a flow guiding structure from top to bottom. This flow guiding structure increases the flow path of the oil-gas mixture in the filter section 7 and increases the collision probability of oil mist particles with the fibers, thereby improving the filtration efficiency. On the other hand, it facilitates the downward flow and collection of the filtered and separated oil mist particles under the action of gravity along the inclined direction of the fibers, avoiding the accumulation of oil in the filter section 7 and increasing the filtration resistance, and further reducing the pressure drop of the filter element.

[0042] Example 4 This embodiment is based on Embodiment 1, such as... Figure 3 As shown, the opening and closing assembly 5 includes: a plurality of support plates 501 for fixed connection with the filter assembly 3, wherein filter fibers are disposed between the support plates 501; a guide member 502 with an opening facing downward, wherein the guide member 502 is disposed at the lower part of the support plates 501, and wherein an elastic member 503 is disposed inside the guide member 502; and a sliding member 504 that moves axially along the guide member 502, wherein the sliding member 504 is disposed inside the guide member 502, and one end is connected to the elastic member 503, and the other end is provided with a valve core 505 driven by the elastic member 503 and used to block the port 4, wherein the elastic member 503 is a spring.

[0043] Specifically, there are multiple support plates 501, such as 3 or 4. The support plates 501 extend radially along the filter assembly 3, with their outer ends fixedly connected to the inner wall or inner frame 304 of the filter assembly 3, and their inner ends fixedly connected to the outer wall of the guide member 502, thereby coaxially supporting the guide member 502 inside the filter assembly 3. Filter fibers are provided between the support plates 501. These filter fibers are used to filter the gas bypassed after the valve core 505 is opened, ensuring that even in the emergency bypass state, the output gas still undergoes a certain degree of filtration, preventing unfiltered gas from carrying impurities into the subsequent system.

[0044] The guide member 502 has a cylindrical structure, with its upper end closed and its lower end open, with the opening facing downwards and corresponding to the position of the through-hole 4. The elastic member 503 is disposed in the internal cavity of the guide member 502. The upper end of the elastic member 503 abuts against the inner top wall of the guide member 502, and the lower end abuts against the upper end of the sliding member 504. The elastic member 503 is preferably a compression spring, and its elastic coefficient is selected and set according to the preset opening pressure difference.

[0045] The sliding member 504 passes through the interior of the guide member 502, with its upper end connected to the elastic member 503 and its lower end extending out of the opening of the guide member 502 and connected to the valve core 505. Under normal operating conditions, the elastic member 503 applies a downward elastic force to the sliding member 504, keeping the valve core 505 in a blocked state against the port 4, ensuring that the oil-gas mixture is completely filtered through the filter section 7. When the filter section 7 becomes clogged due to long-term use, the pressure difference in the cavity formed between the filter assembly 3 and the housing 1 gradually increases. When this pressure difference increases... When the pressure exceeds the preset elastic force of the elastic element 503, the air pressure pushes the valve core 505 to overcome the elastic force of the elastic element 503 and move upward, causing the sliding element 504 to slide upward along the axial direction of the guide element 502. This causes the valve core 505 to disengage from the port 4, opening the emergency ventilation channel, allowing the gas to bypass the blocked filter part 7 and be discharged directly through the port 4. This realizes the automatic opening of the bypass function according to the filter element blockage status, avoiding the problem of local deformation, cracking or even failure of the filter element due to excessive pressure difference, and ensuring the stable operation of the entire compression system.

[0046] Preferably, a sealing element 506 is provided on the outer side of the valve core 505. The sealing element 506 is used to improve the sealing effect when the valve core 505 blocks the port 4, and to prevent unfiltered gas from leaking from the port 4. The sealing element 506 is preferably an O-ring, which is fitted into the annular sealing groove on the outer peripheral wall of the valve core 505.

[0047] Example 5 This embodiment is based on Embodiment 1, such as... Figure 3 , Figure 6 As shown, the bottom of the support member 6 is provided with at least one guide groove 601 that communicates with the port 4.

[0048] The guide groove 601 is disposed on the bottom surface of the support member 6. The middle part of the guide groove is connected to the port 4, and both ends extend to the edge of the support member 6, corresponding to the position of the return oil pipe interface. The guide groove 601 is used to guide the oil filtered by the filter element to flow from the port 4 to the return oil pipe 8 along a predetermined path, avoiding the accumulation of lubricating oil at the bottom of the housing 1 or the obstruction of flow. At the same time, it avoids the fluid from stagnating at the bottom of the housing, further reducing the system resistance. When the valve core 505 of the opening and closing component 5 is opened, the guide groove 601 also provides a flow channel for emergency bypass gas, so that the gas can flow smoothly through the port 4 and the guide groove 601 to the return oil pipe 8 for discharge.

[0049] Working principle of the invention When the high-performance, low-pressure-loss oil-gas separator filter element of the present invention is in operation, the filter element is first installed on the mounting base of the oil-gas tank through the internal thread 201 at the opening of the housing 1, so that the return oil pipe interface is connected to the return oil pipe of the oil-gas tank.

[0050] Compressed gas containing oil mist enters the dispersion port 302 from the oil-gas tank through the air inlet 301 of the housing 1, impacting and driving the guide vanes in the dispersion port 302 to rotate. Under the swirling action of the guide vanes, large-diameter oil mist particles in the oil-gas mixture are thrown towards the inner wall of the housing 1 by centrifugal force and flow down along the side wall to the bottom of the housing 1, realizing the pre-separation of large-diameter oil droplets and reducing the filtration load of the filter section 7.

[0051] The pre-separated oil-gas mixture then enters the filter assembly 3, passing through the filter section 7 from the outside of the outer frame 303 and into the interior of the inner frame 304. In the filter section 7, multiple layers of filter fibers perform fine filtration of the oil-gas mixture. Tiny oil mist particles are captured and aggregated by the fibers, flowing downwards under gravity along the cross-shaped, inclined fiber guide structure, eventually collecting at the bottom of the filter assembly 3 and returning to the oil sump of the oil-gas tank via the inlet 4 and the return oil pipe 8. The purified gas flows upwards from inside the inner frame 304 and is discharged through the filter element opening.

[0052] As the filter section 7 gradually becomes clogged due to prolonged use, the pressure difference across the filter assembly 3 gradually increases. When the pressure difference reaches the preset opening pressure of the elastic element 503, the air pressure pushes the valve core 505 upward against the elastic force of the elastic element 503. The valve core 505 disengages from the port 4, and the emergency ventilation channel automatically opens. At this time, some gas can bypass the clogged filter section 7 and be directly discharged through the port 4. Simultaneously, the filter fibers installed between the support plates 501 filter the bypass gas, ensuring the cleanliness of the output gas. This automatic bypass function effectively prevents the filter element from being damaged due to excessive pressure difference, ensuring the continuous and stable operation of the compression system.

[0053] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-performance, low-pressure-loss oil-gas separator filter element, characterized in that, include, The housing has an upward-opening mounting cavity and a downward-opening oil return pipe interface; A filter assembly is disposed within the cavity of the housing, and the air inlet provided on the upper part of the filter assembly is in contact with the inner wall of the housing. The bottom of the filter assembly is provided with an opening opposite to the oil return pipe. An opening and closing component is provided, which is arranged along the axial direction of the filter component and is located near the opening at the bottom of the opening and closing component. A support member is disposed at the bottom of the filter assembly and is used to support the filter assembly.

2. The high-performance, low-pressure-loss oil-gas separator filter element according to claim 1, characterized in that, The opening of the housing is provided with an internal thread for fixing and connecting to the outside.

3. The high-performance, low-pressure-loss oil-gas separator filter element according to claim 1, characterized in that, The filter assembly includes: a dispersion port disposed in the air intake, and a guide vane disposed inside the dispersion port that rotates axially with the opening and closing assembly.

4. The high-performance, low-pressure-loss oil-gas separator filter element according to claim 3, characterized in that, The filter assembly further includes an outer frame and an inner frame, with a filter section disposed between the inner frame and the outer frame, the filter section being composed of multiple layers of fiber filter material.

5. A high-performance, low-pressure-loss oil-gas separator filter element according to claim 4, characterized in that, The fiber material of the filter section is arranged in a crisscrossing and inclined manner from top to bottom.

6. The high-performance, low-pressure-loss oil-gas separator filter element according to claim 3, characterized in that, The guide vanes may be provided with guide grooves.

7. A high-performance, low-pressure-loss oil-gas separator filter element according to claim 6, characterized in that, The guide channel is a V-shaped guide channel.

8. The high-performance, low-pressure-loss oil-gas separator filter element according to claim 1, characterized in that, The opening and closing assembly includes: a plurality of support plates for fixed connection with the filter assembly, and filter fibers are disposed between the support plates; A guide member with an opening facing downwards is provided at the lower part of the support plate, and an elastic member is provided inside the guide member; A sliding member that moves axially along the guide member, the sliding member being disposed within the guide member, with one end connected to the elastic member and the other end provided with a valve core driven by the elastic member and used to block the port.

9. A high-performance, low-pressure-loss oil-gas separator filter element according to claim 1, characterized in that, A sealing element is fitted on the outside of the valve core.

10. A high-performance, low-pressure-loss oil-gas separator filter element according to claim 1, characterized in that, The bottom of the base is provided with at least one guide groove that communicates with the opening.

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