Filter element structure and servo valve

Abstract

The utility model relates to the technical field of liquid filtration, in particular to a filter element structure and a servo valve, the filter element structure comprises a filter screen body, the filter screen body is hollow, and the two ends of the filter screen body are connected with end covers; the supporting piece is provided with pores, is positioned in the inner cavity of the filter screen body and is used for supporting the filter screen body; according to the servo valve, particulate matter in oil can be filtered through the filter screen body, so that impurities in the oil are reduced, the service life of the servo valve is prolonged, the filter screen body can be supported through the supporting piece with the holes, the filtered oil passes through the holes of the supporting piece, and the service life of the servo valve is prolonged. And the possibility that the filter screen body is deformed and damaged due to internal and external pressure difference after being used for a period of time and particles are attached to the surface is reduced, and the possibility that the service life of the servo valve is influenced due to deformation of the filter screen is reduced on the premise that oil filtering is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of liquid filtration, and in particular to a filter element structure and a servo valve. Background Art

[0002] The filter element is the heart of the filter and the primary component of its filtration and purification functions. Filter elements are primarily used in filtration industries, such as oil, air, and water filtration, to remove small amounts of solid particles from liquids or air, or to remove harmful substances such as bacteria, thereby protecting equipment or air. When liquid (or gas) enters the filter element, its impurities are trapped, while the clean fluid flows out through the element.

[0003] The prior art discloses a multi-layer filter screen, which includes a first filter screen. The first filter screen is a barrel-shaped filter screen with an open end. A second filter screen is fixedly connected to the center of the non-open end of the first filter screen. The diameter of the first filter screen is larger than the diameter of the second filter screen, and the height of the first filter screen is higher than the height of the second filter screen.

[0004] Regarding the relevant technologies mentioned above, the function of the filter in the servo valve is to filter particulate matter in the oil. As the filter is used for a longer time, a layer of particulate matter will adhere to the surface of the filter, causing the filter element structure to be blocked, resulting in poor oil circulation effect, and causing a pressure difference between the inside and outside of the filter. When the pressure difference reaches a certain size, it will apply an extrusion force to the filter, causing the filter to deform. The deformed filter no longer filters particulate matter, which has a great impact on the service life of the servo valve. Utility Model Content

[0005] In order to reduce the possibility of filter deformation affecting the service life of the servo valve while achieving oil filtration, the present application provides a filter element structure and a servo valve.

[0006] The filter element structure and servo valve provided in this application adopt the following technical solutions:

[0007] In a first aspect, the present application provides a filter element structure.

[0008] A filter element structure, comprising:

[0009] The filter body is hollow and has end caps connected to both ends of the filter body;

[0010] A support member with pores is located in the inner cavity of the filter body and is used to support the filter body.

[0011] By adopting the above technical solution, the filter element structure is designed, and the particulate matter in the oil can be filtered through the filter body to reduce impurities in the oil and thus extend the service life of the servo valve. The filter body can be supported by a support member with pores, and the filtered oil can pass through the pores of the support member, thereby reducing the possibility of the filter body being deformed and damaged due to the internal and external pressure difference caused by particulate matter adhering to the surface after a period of use. Under the premise of achieving oil filtration, the possibility of the filter deformation and affecting the service life of the servo valve is reduced.

[0012] In a specific possible implementation manner, at least one of the end caps is provided with an embedding and pressing groove on a side close to the support member, and the support member extends into the embedding and pressing groove.

[0013] By adopting the above technical solution, the designed embedded clamping groove can limit the radial position of the support member, reducing the possibility of the support member shaking during use.

[0014] In a specific possible implementation scheme, a locking groove is provided on the end cover, the locking groove is communicated with the embedding and pressing groove, and a locking block is integrally formed on the support member, and the locking block can be inserted into the locking groove.

[0015] By adopting the above technical solution, the designed locking groove can cooperate with the locking block on the support member to avoid the possibility of the support member rotating around its own axis, thereby improving the support reliability of the support member on the filter body.

[0016] In a specific embodiment, a sliding gap is left between the support member and the inner side wall of the filter body.

[0017] By adopting the above technical solution, a support member is designed with a sliding gap between the support member and the inner side wall of the filter body, which can facilitate the installation of the support member while achieving the strengthening of the support of the filter body.

[0018] In a specific embodiment, the support member includes a support body, the support body is hollow and has at least one end open, and a plurality of liquid holes are formed on the support body.

[0019] By adopting the above technical solution, the designed support member can support the filter body through the support body, and the filtered oil can pass through the liquid hole.

[0020] In a specific embodiment, the support member includes a plurality of support rings, and the plurality of support rings are distributed along the axial direction of the filter body.

[0021] By adopting the above technical solution, the designed support member can form a support skeleton for the filter body through multiple support rings, and can achieve the passage of filtered oil through the gap between two adjacent support rings. It is also possible to partially replace individual support rings after they are deformed due to force, thereby reducing the cost of supporting the filter body.

[0022] In a specific embodiment, a plurality of liquid-passing gaps are formed at the end of the support ring.

[0023] By adopting the above technical solution and designing the liquid passage gap, the passage speed of the oil can be further increased.

[0024] In a specific embodiment, the support member includes

[0025] Two fixing rings, the two fixing rings are respectively arranged near the two end covers, and the fixing rings can be inserted into the embedding and pressing grooves;

[0026] A plurality of support bars are provided, wherein both ends of the support bars are respectively connected to the two fixing rings, and a gap is left between two adjacent support bars.

[0027] By adopting the above technical solution, the designed support part can cooperate with the embedded clamping groove through the fixing ring to achieve radial limitation, and the support bar can cooperate with the fixing ring to form a support skeleton with holes, which can support the filter body while facilitating the passage of filtered oil.

[0028] In a specific embodiment, it further includes at least one reinforcement ring, which is connected to the support bar, and the axial direction of the reinforcement ring is consistent with the axial direction of the fixing ring.

[0029] By adopting the above technical solution, the designed reinforcement ring can improve the structural stability of the support bar and enhance the support strength of the filter body.

[0030] In a second aspect, the present application provides a servo valve.

[0031] A servo valve comprises a valve body and a filter core structure, wherein the filter core structure is installed in the valve body.

[0032] By adopting the above technical solution, the designed servo valve can reduce the possibility that the service life of the valve body will be shortened due to damage to the filter body.

[0033] In summary, this application includes at least one of the following beneficial technical effects:

[0034] 1. The designed filter element structure can filter particulate matter in the oil through the filter body to reduce impurities in the oil and thus extend the service life of the servo valve. The filter body can be supported by a support member with pores, and the filtered oil can pass through the pores of the support member, reducing the possibility of deformation and damage of the filter body due to internal and external pressure difference caused by particulate matter adhering to the surface after a period of use. Under the premise of achieving oil filtration, the possibility of filter deformation and thus affecting the service life of the servo valve is reduced.

[0035] 2. The designed filter element structure can cooperate with the locking block on the support to avoid the possibility of the support rotating around its own axis, thereby improving the support reliability of the support to the filter body.

[0036] 3. The designed filter element structure can form a support skeleton for the filter body through multiple support rings, and can achieve the passage of filtered oil through the gap between two adjacent support rings. It can also be partially replaced after individual support rings are deformed due to force, reducing the cost of filter body support. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of the filter element structure of an embodiment of the present application.

[0038] Figure 2 yes Figure 1 sectional view of .

[0039] Figure 3 yes Figure 2 Schematic diagram of the partial structure of the middle filter body and end cover.

[0040] Figure 4 is Figure 3 Schematic diagram of the structure with a locking groove added on the basis of FIG.

[0041] Figure 5 It is a structural schematic diagram when the support member is set as a support body in an embodiment of the present application.

[0042] Figure 6 It is a schematic diagram of the assembly structure of the support body and the filter body in the embodiment of the present application.

[0043] Figure 7 It is a structural diagram of an embodiment of the present application in which the support member is configured as a support ring.

[0044] Figure 8 yes Figure 7 Schematic diagram of the assembly structure of the support ring and the filter body in the embodiment of the present application.

[0045] Figure 9 It is a structural diagram of an embodiment of the present application in which the support member is configured as a fixing ring and a support bar.

[0046] Explanation of the accompanying reference numerals: 1. Filter body; 2. End cover; 21. Embedded compression groove; 22. Locking groove; 3. Support member; 31. Support body; 311. Liquid hole; 32. Support ring; 321. Liquid gap; 33. Fixing ring; 34. Support bar; 35. Reinforcement ring; 4. Locking block. DETAILED DESCRIPTION

[0047] The following is combined with Figure 1-9 This application is described in further detail.

[0048] The embodiments of the present application disclose a filter element structure and a servo valve.

[0049] In a first aspect, an embodiment of the present application discloses a filter element structure.

[0050] Reference Figure 1 and Figure 2 , a filter element structure includes a filter body 1, an end cover 2 and a support member 3 with pores, the filter body 1 is hollow, and both axial ends of the filter body 1 are open; there are two end covers 2, which are respectively welded or plugged to the two ends of the filter body 1, and a liquid outlet is formed on one of the end covers 2; the support member 3 is located in the inner cavity of the filter body 1, and is used to support the filter body 1. After the oil is filtered by the filter body 1, it passes through the pores on the support member 3 and then enters the rear-end pipeline through the liquid outlet on the end cover 2; the particulate matter in the oil can be filtered by the filter body 1 to reduce impurities in the oil and thus extend the service life of the servo valve, the filter body 1 can be supported by the support member 3 with pores, and the filtered oil is passed through the pores of the support member 3, thereby reducing the possibility of deformation and damage of the filter body 1 due to the internal and external pressure difference caused by the attachment of particulate matter to the surface after a period of use, and reducing the possibility of deformation of the filter and affecting the service life of the servo valve while achieving oil filtration.

[0051] Reference Figure 2 In order to facilitate the rapid installation of the support member 3 while strengthening the support of the filter body 1 and reduce the damage to the filter body 1 caused by the installation process, a sliding gap is left between the support member 3 and the inner wall of the filter body 1.

[0052] Reference Figure 3 In some embodiments of the present application, in order to radially limit the support member 3 and reduce the possibility of the support member 3 shaking during use, at least one end cover 2 is provided with an embedded clamping groove 21 on the side close to the support member 3, and the end of the support member 3 extends into the embedded clamping groove 21. In this application, in order to improve the consistency of the support of the support member 3 on the filter body 1, the embedded clamping groove 21 is coaxially arranged with the filter body 1, and embedded clamping grooves 21 are provided on both end covers 2.

[0053] Reference Figure 4 and Figure 5 In order to further reduce the possibility of relative rotation between the support member 3 and the end cover 2 around its own axial direction during use, improve the support reliability of the support member 3 on the filter body 1 and reduce the possibility of abnormal noise, a locking groove 22 is provided on the end cover 2, and the locking groove 22 is connected to the embedded pressing groove 21, and a locking block 4 is integrally formed on the support member 3, and the locking block 4 can be inserted into the locking groove 22.

[0054] Reference Figure 5 and Figure 6 In some embodiments of the present application, the support member 3 specifically includes a support body 31, the support body 31 is hollow and has an open end at least one end, and a plurality of liquid holes 311 are provided on the support body 31. In the present application, the support body 31 can be obtained by subtractive processing of a metal block, or can be obtained by curling a strip-shaped metal sheet with holes. In this embodiment, the support body 31 is obtained by curling a strip-shaped metal sheet with holes, and the ends of the metal sheet are welded and fixed.

[0055] Reference Figure 7 In some other embodiments of the present application, the support member 3 includes a plurality of support rings 32, and the plurality of support rings 32 are distributed along the axial direction of the filter body 1, and the gap between two adjacent support rings 32 is used for the filtered oil to pass through; a plurality of support rings 32 can form a support skeleton for the filter body 1, and the filtered oil can pass through the gap between two adjacent support rings 32, and individual support rings 32 can be partially replaced after being deformed due to force, thereby reducing the cost of supporting the filter body 1.

[0056] Reference Figure 8 In order to further increase the oil flow rate, a plurality of liquid-passing notches 321 are opened at the end of the support ring 32 , and the plurality of liquid-passing notches 321 are evenly distributed circumferentially around the central axis of the support ring 32 .

[0057] Reference Figure 9 In some other embodiments of the present application, the support member 3 includes a fixing ring 33 and a support bar 34. There are two fixing rings 33, and the two fixing rings 33 are respectively arranged near the two end covers 2, and the fixing rings 33 can be inserted into the clamping groove 21. There are multiple support bars 34, and the multiple support bars 34 are distributed around the circumference of the fixing ring 33, and the two ends of the support bar 34 are respectively welded and fixed to the two fixing rings 33, leaving a gap between the two adjacent support bars 34.

[0058] Reference Figure 9In order to improve the structural stability of the support bars 34 and enhance the supporting strength of the filter body 1, the support member 3 further includes at least one reinforcement ring 35, which is welded and fixed to the multiple support bars 34 at the same time, and the reinforcement ring 35 is coaxially arranged with the fixing ring 33. In the present application, the number of reinforcement rings 35 can be one, two, or three, as long as the structural stability of the support bars 34 can be improved. The reinforcement ring 35 can be located in a frame surrounded by the multiple support bars 34, or the multiple support bars 34 can be arranged through the inner cavity of the reinforcement ring 35. In the present embodiment, the number of reinforcement rings 35 is one, and the multiple support bars 34 are arranged through the inner cavity of the reinforcement ring 35.

[0059] The implementation principle of a filter element structure in an embodiment of the present application is: first place the support member 3 into the filter body 1, then connect and fix one end cover 2 to the filter body 1, then adjust the position of the support member 3 so that the support member 3 cooperates with the embedded clamping groove 21, and then connect and fix the other end cover 2 to the filter body 1 to obtain a complete filter element structure. When in use, the oil is first filtered through the filter body 1, and the filtered oil enters the inner cavity of the support member 3 through the pores on the support member 3, and then enters the rear-end pipeline through the drainage hole opened on the end cover 2.

[0060] In a second aspect, an embodiment of the present application discloses a servo valve.

[0061] A servo valve includes a valve body and the filter element structure disclosed in the first aspect of the embodiment of the present application. The filter element structure is installed in the valve body. After the oil is filtered by the filter body 1, it passes through the pores on the support 3 and the side of the end cover 2 with a notch and flows into the rear end pipeline.

[0062] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A filter element structure, characterized in that: include: A filter body (1), wherein the filter body (1) is hollow, and both ends of the filter body (1) are connected to end covers (2); A support member (3) having pores, the support member (3) being located in the inner cavity of the filter body (1) and being used for supporting the filter body (1).

2. The filter element structure according to claim 1, characterized in that: At least one of the end covers (2) is provided with an embedding and pressing groove (21) on a side close to the support member (3), and the support member (3) extends into the embedding and pressing groove (21).

3. The filter element structure according to claim 2, characterized in that: The end cover (2) is provided with a locking groove (22), the locking groove (22) is communicated with the embedding and pressing groove (21), and a locking block (4) is integrally formed on the support member (3), and the locking block (4) can be inserted into the locking groove (22).

4. The filter element structure according to claim 3, characterized in that: A sliding gap is left between the support member (3) and the inner side wall of the filter body (1).

5. The filter element structure according to any one of claims 1 to 4, characterized in that: The support member (3) comprises a support body (31), the support body (31) is hollow and has at least one end open, and a plurality of liquid holes (311) are provided on the support body (31).

6. The filter element structure according to claim 1, characterized in that: The support member (3) comprises a plurality of support rings (32), and the plurality of support rings (32) are distributed along the axial direction of the filter body (1).

7. The filter element structure according to claim 6, characterized in that: A plurality of liquid-passing notches (321) are formed at the end of the support ring (32).

8. The filter element structure according to any one of claims 2 to 4, characterized in that: The support member (3) comprises Two fixing rings (33), the two fixing rings (33) are respectively arranged close to the two end covers (2), and the fixing rings (33) can be inserted into the embedding and pressing grooves (21); A plurality of support bars (34) are provided, wherein two ends of the support bars (34) are respectively connected to the two fixing rings (33), and a gap is left between two adjacent support bars (34).

9. The filter element structure according to claim 8, characterized in that: It also includes at least one reinforcement ring (35), the reinforcement ring (35) is connected to the support bar (34), and the axial direction of the reinforcement ring (35) is consistent with the axial direction of the fixing ring (33).

10. A servo valve, characterized in that: The invention comprises a valve body and a filter element structure according to any one of claims 1 to 9, wherein the filter element structure is installed in the valve body.

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