Long-life oil filter

Abstract

The utility model discloses an oil filter with long service life, and belongs to the technical field of filters. The oil filter comprises a shell and a filter element mounted in the shell, the filter element comprises a central pipe, a composite filter layer, an upper end cover and a lower end cover, the composite filter layer is annularly arranged on the outer side of the central pipe, and the upper end cover and the lower end cover are fixedly installed at the upper end and the lower end of the central pipe and the upper end and the lower end of the composite filter layer respectively; an oil outlet is formed in the center of the upper end cover, and a plurality of flow deflectors which are uniformly distributed in the circumferential direction of the upper end cover are arranged on the outer side of the upper end cover; the composite filter layer comprises at least two layer structures, and the filter precision of the layer structures is gradually increased from the oil inlet side to the oil outlet side. According to the oil filter, the filtering efficiency can be effectively improved, the service life of the oil filter is greatly prolonged, the problems that the maintenance interval time of machinery equipment is short and the maintenance frequency is high due to the fact that the service life of a traditional oil filter is too short are solved, the use cost of the machine is reduced, and the oil filter has excellent market popularization prospects and product competitiveness.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, specifically to a long-life oil filter. Background Technology

[0002] Oil filters are lubricating oil or fuel filtration devices used in industrial machinery such as automotive and air compressors. They remove various impurities that fall into the lubricating oil during operation, improving oil quality and reducing damage to the equipment caused by impurities, thus protecting its normal operation. Existing oil filter elements mainly consist of a central tube, filter media, and upper and lower end caps. The filter media typically comprises a single filter layer and support meshes on both sides of the filter paper. This single filter layer is exposed unprotected in the oil, and due to hydraulic pressure and prolonged immersion, its filtration efficiency decreases, affecting filtration quality and shortening the filter element's lifespan. Traditional oil filters typically have a lifespan of only 500-2000 hours, resulting in shorter maintenance intervals and increased maintenance frequency and operating costs. Furthermore, the erratic flow of oil entering traditional oil filters allows larger impurities to easily clog the filter layer surface, affecting the media's ability to filter smaller impurities and further shortening its lifespan.

[0003] Therefore, it is essential to develop a long-life oil filter that can reduce the frequency and cost of equipment maintenance. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a long-life oil filter that can improve filtration efficiency and thus greatly extend the service life of the oil filter.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0006] A long-life oil filter includes a housing and a filter element installed inside the housing. The filter element includes a central tube, a composite filter layer, an upper end cap, and a lower end cap. The composite filter layer is arranged around the outside of the central tube. The upper end cap and the lower end cap are respectively fixedly installed at the upper and lower ends of the central tube and the composite filter layer. An oil outlet is provided at the center of the upper end cap, and a plurality of guide vanes are fixedly arranged circumferentially on the outer side of the upper end cap. The composite filter layer includes at least two layers, and the filtration accuracy of the filter layer gradually increases from the oil inlet side to the oil outlet side.

[0007] In a preferred embodiment of this utility model, the guide vane is inclined downward along the fluid flow direction and disposed on the outer side of the upper end cover.

[0008] More preferably, the tilt angle α of the guide vane is 10° to 25°.

[0009] More preferably, the number of guide vanes is 4 to 8.

[0010] In a preferred embodiment of this utility model, the composite filter layer includes an outer support mesh, a coarse filter layer, a low-precision filter layer, a high-precision filter layer, a protective layer, and an inner support mesh arranged sequentially from the oil inlet side to the oil outlet side.

[0011] In a preferred embodiment of this utility model, the coarse filter layer is a non-woven fabric layer or a polyester fiber cotton layer.

[0012] In a preferred embodiment of this utility model, both the low-precision filter layer and the high-precision filter layer are glass fiber filter layers.

[0013] In a preferred embodiment of this utility model, the protective layer is a non-woven fabric layer.

[0014] In a preferred embodiment of the present invention, the outer shell includes a threaded plate assembly and a housing with an opening, the threaded plate assembly being fixedly installed on the opening of the housing; a support spring is provided between the filter element and the housing, one end of the filter element abuts against the threaded plate assembly and the other end abuts against the support spring, and a fluid channel is formed between the filter element and the side wall of the housing.

[0015] In a preferred embodiment of this utility model, the threaded plate assembly is provided with an oil outlet and an oil inlet in sequence from the axis toward the inner wall of the housing. The oil inlet is connected to the fluid channel, and the oil outlet is connected to the oil outlet of the upper end cover.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This utility model's long-life oil filter utilizes two main advantages. First, multiple guide vanes are installed on the outer circumference of the upper cover. Under the action of these vanes, the oil swirls between the filter element and the inner wall of the outer shell, flowing towards the inner wall. The resulting centrifugal force throws some large particles of impurities towards the inner wall and causes them to settle to the bottom of the outer shell, providing preliminary filtration. This effectively reduces the possibility of large particles adhering to the filter element surface, thus preventing blockage and extending the oil filter's lifespan. Second, by incorporating at least two filter layers within the composite filter layer, with the filtration precision gradually increasing from the inlet to the outlet, multiple filter layers with varying filtration precision filter different impurities, significantly improving the filter element's filtration efficiency and further extending the oil filter's lifespan. Therefore, this utility model's oil filter effectively improves filtration efficiency, thereby greatly extending its lifespan. It solves the problem of short maintenance intervals and high maintenance frequency caused by the short lifespan of traditional oil filters, thus reducing user operating costs and demonstrating excellent market prospects and product competitiveness. Attached Figure Description

[0018] Figure 1 This is a partial cross-sectional view of the long-life oil filter of this utility model;

[0019] Figure 2 This is an exploded view of the long-life oil filter of this utility model.

[0020] Figure 3 This is a three-dimensional structural diagram of the upper cover of the long-life oil filter of this utility model.

[0021] Figure 4 This is a front view of the upper end cap of the long-life oil filter of this utility model;

[0022] Figure 5 This is a partial schematic diagram of the upper cover of the long-life oil filter of this utility model;

[0023] Figure 6 This is a schematic diagram of the fluid flow direction of the long-life oil filter of this utility model;

[0024] Figure 7 This is a schematic diagram of the composite filter layer of the long-life oil filter of this utility model;

[0025] Reference numerals: 1. Housing; 2. Threaded plate assembly; 21. Oil outlet; 22. Oil inlet; 3. Filter element; 4. Support spring; 5. Central tube; 6. Composite filter layer; 61. Outer support mesh; 62. Coarse filter layer; 63. Low-precision filter layer; 64. High-precision filter layer; 65. Protective layer; 66. Inner support mesh; 7. Upper end cover; 71. Oil outlet; 8. Lower end cover; 9. Guide vane; 91. Guide part; 92. Connecting part. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] like Figure 1 and Figure 2 As shown, the long-life oil filter provided by this utility model includes a housing and a filter element 3 installed inside the housing. The housing includes a threaded plate assembly 2 and a shell 1 with an opening. The threaded plate assembly 2 is fixedly installed on the opening of the shell 1 by riveting or other means, forming a receiving cavity between the threaded plate assembly 2 and the shell 1. The filter element 3 is fixedly disposed within this receiving cavity. A support spring 4 is provided between the filter element 3 and the shell 1. One end of the filter element 3 abuts against the threaded plate assembly 2, and the other end abuts against the support spring 4, forming a fluid channel between the filter element 3 and the side wall of the shell 1. The threaded plate assembly 2 has an oil outlet hole 21 and an oil inlet hole 22 sequentially arranged from its axis toward the inner wall of the shell 1. The oil outlet hole 21 is located at the center of the threaded plate assembly 2. Multiple oil inlets 22 are evenly distributed circumferentially along the oil outlet hole 21. The oil inlets 22 communicate with the fluid channel, and the oil outlet holes 21 communicate with the filter element 3.

[0028] Specifically, the filter element 3 includes a central tube 5, a composite filter layer 6, an upper end cap 7, and a lower end cap 8. Several oil passage holes are formed on the side wall of the central tube 5. The composite filter layer 6 is arranged around the outside of the central tube 5. The upper end cap 7 and the lower end cap 8 are respectively fixedly installed at the upper and lower ends of the central tube 5 and the composite filter layer 6. The upper end cap 7 abuts against the threaded plate assembly 2, and a sealing ring is provided at the connection between the upper end cap 7 and the threaded plate assembly 2. An oil outlet 71 is formed at the center of the upper end cap 7, and this oil outlet 71 communicates with the oil outlet 21 of the threaded plate assembly 2. Figure 3 and Figure 4 As shown, multiple guide vanes 9 are evenly distributed circumferentially on the outer side of the upper end cover 7. These guide vanes 9 can be fixed to the outer side of the upper end cover 7 by welding or screwing. In specific operation, as... Figure 6As shown, fluid flows into the fluid channel formed by the housing 1 and the filter element 3 through the oil inlet 22 on the outer side of the threaded plate assembly 2. Under the action of the guide vane 9, the oil swirls between the filter element 3 and the inner wall of the housing and flows towards the inner wall of the housing. Then, the fluid passes through the filter element 3 and flows into the machine through the oil outlet 71 of the upper end cover 7 and the oil outlet 21 of the threaded plate assembly 2. It can be seen that the guide vane 9 can guide the disorderly flowing fluid and make it swirl. The centrifugal force generated by this can throw some large particles of impurities toward the inner wall of the housing and settle to the bottom of the housing, playing a preliminary filtration role. This effectively reduces the possibility of large particles of impurities adhering to the surface of the filter element 3, thereby avoiding the easy formation of blockages on the surface of the filter layer by large particles of impurities, and effectively extending the service life of the oil filter. Furthermore, the composite filter layer 6 comprises at least two layers, and the filtration precision of the filter layers gradually increases from the oil inlet side to the oil outlet side. By setting the filter layers with increasing filtration precision according to the fluid flow direction, different impurities are filtered in layers, reducing the load on the single-layer plant fiber filter layer in the traditional filter element 3, greatly improving the filtration efficiency of the filter element 3, and slowing down the pressure difference increase, thus further extending the service life of the oil filter. Therefore, the oil filter of this invention can effectively improve filtration efficiency, thereby greatly extending the service life of the oil filter.

[0029] Specifically, the guide vane 9 includes a guide portion 91 and a connecting portion 92. The guide portion 91 and the connecting portion 92 are vertically connected and integrally formed. The connecting portion 92 is fixed to the outer side of the upper end cover 7 by welding or a connector. In some embodiments, the guide vane 9 is inclined downward along the fluid flow direction on the outer side of the upper end cover 7. In some embodiments, such as Figure 5 As shown, the tilt angle α of the guide vane 9 is 10° to 25°, preferably 15°. In some embodiments, the number of guide vanes 9 is 4 to 8, preferably 6. In some embodiments, such as Figure 7 As shown, the composite filter layer 6 includes, sequentially arranged from the oil inlet side to the oil outlet side, an outer support mesh 61, a coarse filter layer 62, a low-precision filter layer 63, a high-precision filter layer 64, a protective layer 65, and an inner support mesh 66. The inner support mesh 66 and the outer support mesh 61 support the filter media to prevent deformation under hydraulic pressure. The coarse filter layer 62 performs coarse filtration while also protecting the low-precision filter layer 63 and the high-precision filter layer 64. The low-precision filter layer 63 and the high-precision filter layer 64 perform secondary filtration and final filtration of the fluid, respectively. The layers are stacked in sequence and then folded using a folding machine. In some embodiments, the coarse filter layer 62 is a non-woven fabric layer or a polyester fiber cotton layer. In some embodiments, both the low-precision filter layer 63 and the high-precision filter layer 64 are glass fiber filter layers. In some embodiments, the protective layer 65 is a non-woven fabric layer.

[0030] In summary, this invention can effectively improve filtration efficiency, greatly extend the service life of oil filters, solve the problem of short maintenance intervals and high maintenance frequency caused by the short service life of traditional oil filters, reduce machine operating costs, and has excellent market promotion prospects and product competitiveness.

[0031] It should be noted that in the description of this utility model, any descriptions of orientation, such as up, down, front, back, left, right, etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and should not be construed as a limitation of this utility model.

[0032] In the description of this utility model, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is mentioned, it is only for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0033] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0034] 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 long life oil filter characterized by: The device includes a housing and a filter element installed inside the housing. The filter element includes a central tube, a composite filter layer, an upper end cap, and a lower end cap. The composite filter layer is arranged around the outside of the central tube. The upper end cap and the lower end cap are respectively fixedly installed at the upper and lower ends of the central tube and the composite filter layer. An oil outlet is provided at the center of the upper end cap. Multiple guide vanes are fixedly arranged evenly along the circumference of the outer side of the upper end cap. The composite filter layer includes at least two layers, and the filtration accuracy of the layers gradually increases from the oil inlet side to the oil outlet side.

2. The long-life oil filter of claim 1, wherein: The guide vane is inclined downward along the direction of fluid flow and is disposed on the outer side of the upper end cover.

3. The long-life oil filter of claim 2, wherein: The tilt angle α of the guide vane is 10° to 25°.

4. The long-life oil filter of claim 1 or 2, wherein: The number of guide vanes is 4 to 8.

5. The long-life oil filter of claim 1 or 2, wherein: The composite filter layer includes an outer support mesh, a coarse filter layer, a low-precision filter layer, a high-precision filter layer, a protective layer, and an inner support mesh arranged sequentially from the oil inlet side to the oil outlet side.

6. The long-life oil filter of claim 5, wherein: The coarse filter layer is a non-woven fabric layer or a polyester fiber cotton layer.

7. The long-life oil filter according to claim 5, characterized in that: Both the low-precision filter layer and the high-precision filter layer are glass fiber filter layers.

8. The long-life oil filter of claim 5, wherein: The protective layer is a non-woven fabric layer.

9. The long-life oil filter of claim 1 or 2, wherein: The housing includes a threaded plate assembly and a housing with an opening, the threaded plate assembly being fixedly installed on the opening of the housing; a support spring is provided between the filter element and the housing, one end of the filter element abuts against the threaded plate assembly and the other end abuts against the support spring, and a fluid channel is formed between the filter element and the side wall of the housing.

10. The long-life oil filter of claim 9, wherein: The threaded plate assembly is provided with an oil outlet and an oil inlet in sequence from the axis toward the inner wall of the housing. The oil inlet is connected to the fluid channel, and the oil outlet is connected to the oil outlet of the upper end cover.

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