Tandem composite filter element

Abstract

The utility model belongs to the technical field of lubricating oil filtration, and discloses a series composite filter element which comprises a rough filtration assembly and a fine filtration assembly, a first central pipe and a second central pipe are arranged on the inner side of the rough filtration assembly and the inner side of the fine filtration assembly respectively, and the rough filtration assembly and the fine filtration assembly are connected through a pressure opening valve. And the pressure opening valve is in a closed state under a normal working condition. An oil outlet is formed in the tail end of the fine filtration assembly, and the coarse filtration assembly and the fine filtration assembly form a filter element of a series structure. According to the utility model, the filtering work is carried out through the fine filtering assembly under the normal working condition through the filter elements which are connected in series, and when the pressure is too high, the pressure opening valve is opened, and the coarse filtering assembly also starts to carry out the filtering work, so that the lubricating oil used by the wind power machinery in any working state must be completely filtered by the filtering system.

Description

Technical Field

[0001] The utility model relates to the technical field of lubricating oil filtering, in particular to a series composite filter element. Background Art

[0002] Lubricating oil is widely used in machinery, vehicles, and production lines. During the use of lubricating oil, due to the wear of mechanical parts or the generation of very small particles, the oil performance and lubrication capacity are reduced. Currently known filters usually use single paper filter materials, non-woven filter materials, and polymer membrane filter materials. As the use time increases, the filter material is easy to clog, and it is impossible to ensure that the machine is still in normal working condition under long-term working conditions. Utility Model Content

[0003] The purpose of the utility model is to solve the above-mentioned current technical problems, that is, to propose a series composite filter element, which effectively solves the problems of filtration fineness, filtration efficiency and clogging life of traditional filter elements.

[0004] In order to achieve the above-mentioned purpose, the utility model proposes a series composite filter element, including: a coarse filter component and a fine filter component, the inner sides of the coarse filter component and the fine filter component are respectively provided with a first center tube and a second center tube, the coarse filter component and the fine filter component are connected through a pressure opening valve, the pressure opening valve is in a closed state under the default state, the lower end of the fine filter component is provided with an oil outlet, and the coarse filter component and the fine filter component constitute a series composite filter element structure.

[0005] The coarse filter assembly includes a first section upper and lower cover plates, a first outer net, a first central tube, a coarse filter material, and a first sealing ring. The coarse filter material is placed between the first outer net and the first central tube. The upper and lower cover plates are respectively arranged at the two ends of the first outer net and the first central tube. The first sealing ring is installed on the first section lower cover plate.

[0006] Furthermore, the coarse filter material is folded filter cloth or filter cotton or is the same material as the fine filter material.

[0007] The fine filter assembly includes a second upper and lower cover plate, a second outer net, a second central tube, a fine filter material, and a second sealing ring. The fine filter material is placed between the second outer net and the second central tube, the second upper and lower cover plates are respectively arranged at the two ends of the second outer net and the second central tube, and the second sealing ring is installed on the second upper cover plate.

[0008] One end of the pressure opening valve is connected to the lower end of the coarse filter assembly and is sealed by a first sealing ring on the first lower cover plate. The other end of the pressure opening valve is connected to the upper end of the fine filter assembly and is sealed by a second sealing ring on the second upper cover plate, thereby connecting the coarse filter assembly and the fine filter assembly in series.

[0009] A first supporting spring is coaxially arranged on the inner wall of the first central tube, and a second supporting spring is coaxially arranged on the inner wall of the second central tube.

[0010] Furthermore, the length ratio of the coarse filter component to the fine filter component is 1:3-8.

[0011] When the series composite filter element filters the engine oil, the engine oil flows from the outside of the series composite filter element assembly to the inside through the filter material and flows out through the lower port of the second center tube.

[0012] Furthermore, when the working pressure is lower than the threshold, only the fine filter component of the series composite filter element works; when the working pressure exceeds the threshold, the engine oil passes through the coarse filter component and the fine filter component of the series composite filter element at the same time and flows out through the lower port of the second center tube.

[0013] The utility model can filter by fine filtration at ordinary times and filter by coarse filtration when the pressure is too large through the series structure, and can improve the filtering fineness and prevent the blocked engine oil from being unable to circulate and filter smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the series composite filter element of the utility model;

[0015] Figure 2 It is a cross-sectional view of the series composite filter element of the utility model;

[0016] Figure 3 is a structural diagram of the first external network management;

[0017] Figure 4 This is a schematic diagram of the internal structure of the series composite filter element of the utility model. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0019] According to one embodiment of the utility model, Figure 1-2As shown, a series composite filter element is provided, including: a coarse filter component 1 and a fine filter component 2, wherein the inner sides of the coarse filter component 1 and the fine filter component 2 are respectively provided with a first central tube 16 and a second central tube 26, the coarse filter component 1 and the fine filter component 2 are connected through a pressure opening valve 3, and the pressure opening valve 3 is in a closed state under normal working, and an oil outlet 23 is provided at the lower end of the fine filter component 2, and the coarse filter component 1 and the fine filter component 2 form a filter element with a series structure.

[0020] The coarse filter assembly 1 includes a first outer net 14, a first central tube 16, a coarse filter material 15, a first upper cover plate 11, a first lower cover plate 12, and a first sealing ring 18. The coarse filter material 15 is placed between the first outer net 14 and the first central tube 16. The first upper and lower covers are respectively arranged at the two ends of the first outer net and the first central tube, and the first sealing ring is embedded in the first lower cover plate.

[0021] Furthermore, the coarse filter material is a folded filter cloth, filter cotton or a filter material of the same quality as the fine filter material, the folded filter cloth layer is formed by thermally compounding two layers of PET filter paper and three layers of PBT filter paper arranged between the two layers of PET filter paper, and the thickness of the folded filter cloth layer after thermal compounding is 0.6-1.8mm.

[0022] The fine filter assembly 2 includes a second outer net 24, a second center tube 26, a fine filter material 25, a second upper cover plate 21, a lower cover plate 22, and a second sealing ring 28. The fine filter material 25 is placed between the second outer net 24 and the second center tube 26. The second upper and lower covers are respectively arranged at the two ends of the second outer net and the second center tube, and the second sealing ring is embedded in the second upper cover plate.

[0023] The pressure-opening valve 3 comprises an inlet connector 31, an outlet connector 32, an intermediate collar 33 and an internal valve tongue 34;

[0024] One end of the pressure opening valve 3 is connected to the lower cover plate 12 of the coarse filter assembly through a first sealing ring 18, and the other end of the pressure valve is connected to the upper cover plate 21 of the fine filter assembly through a second sealing ring 21, thereby sealing and fixing the coarse filter assembly 1 and the fine filter assembly 2.

[0025] Furthermore, a first support spring 17 is coaxially arranged on the inner wall of the first center tube 16, and a second support spring 27 is coaxially arranged on the inner wall of the second center tube. The outer diameter of the first support spring 17 is the same as the inner diameter of the first center tube 16, thereby supporting the first center tube from the inside; similarly, the outer diameter of the second support spring 27 is the same as the inner diameter of the second center tube 26, thereby supporting the second center tube from the inside. Since the oil applies pressure from the outer wall to the inner wall, the above-mentioned spring can prevent the center tube from being compressed and deformed.

[0026] An oil outlet 23 is provided in the middle of the second lower end cover. After the oil is filtered by the fine filter assembly, it flows out from the oil outlet 3 through the second central pipe.

[0027] Furthermore, the length of the coarse filter component and the fine filter component is 1:3-8, preferably, 1:7-7.5. Under normal working conditions, the fine filter component mainly works, and the coarse filter component does not work.

[0028] Specifically, when the series composite filter element filters the engine oil, since the pressure opening valve is in a closed state in a normal working state, the engine oil flows from the outside of the series composite filter element through the fine filter assembly to the inside of the second central tube.

[0029] When the fine filter component is gradually clogged after long-term use, the pressure increases, and the pressure of the fine filter component exceeds the threshold, the engine oil flows from the outside of the series composite filter element through the coarse filter component to the first central tube inside, passes through the pressure valve and then discharges the coarsely filtered oil through the second central tube. The threshold refers to the opening pressure threshold of the pressure valve. When the pressure exceeds the pressure threshold, the valve tongue in the center of the pressure valve opens. In this way, it can prevent the problem of excessive pressure and poor oil circulation after the fine filter component is clogged. When the pressure is too high, as the pressure valve opens, the coarse filter component enters the working state, thereby preventing the oil from entering the circulation without being filtered, which plays a protective role.

[0030] For further information, see Figure 3-4 The first outer net, the second outer net, the first central tube and the second central tube are all perforated pipe structures with side wall openings, which are used to allow the filtered lubricating oil to flow into the central tube through the pipe perforations. The openings may be circular or square, etc.

[0031] The fine filter material is a bio-based filter material, with a GP double-layer filter cloth 13 on the periphery, made of glass fiber and PET composite material; its weight is 220±30g / ㎡, thickness is 1.0±0.2mm, air permeability is ≥900L / ㎡·s, and average pore size is 80-100μm. The fine filter cloth used in the volumetric biomass filter element disclosed in patent CN2017200403745 has a weight of 100±30g / ㎡, a thickness of 1mm, an air permeability of 110-410L / ㎡·s, and an average pore size of 135μm.

[0032] According to the above embodiments, the utility model can filter finely in normal times and filter coarsely when the pressure is too high through the series structure, thereby improving the filtering fineness and preventing the oil from being blocked from being circulated and filtered smoothly.

[0033] Although the above describes an illustrative specific embodiment of the utility model to facilitate technical personnel in this technical field to understand the utility model, and it should be clear that the utility model is not limited to the scope of the specific embodiment, for ordinary technical personnel in this technical field, as long as various changes are within the spirit and scope of the utility model defined and determined by the attached claims, these changes are obvious, and all utility model creations using the concept of the utility model are protected.

Claims

1. A series composite filter element, characterized by: include: A coarse filter assembly and a fine filter assembly, wherein a first central tube and a second central tube are respectively arranged on the inner sides of the coarse filter assembly and the fine filter assembly, wherein the coarse filter assembly and the fine filter assembly are connected via a pressure opening valve, wherein the pressure opening valve is in a closed state under normal working conditions, and an oil outlet is arranged at the lower end of the fine filter assembly, wherein the coarse filter assembly and the fine filter assembly form a filter element of a series structure.

2. A series composite filter element according to claim 1, characterized in that: The coarse filter assembly includes a first outer net, a first central tube, a coarse filter material, a first upper and lower cover plate, and a first sealing ring. The coarse filter material is placed between the first outer net and the first central tube. The first upper and lower cover plates are respectively arranged at the two ends of the first outer net and the first central tube. The first sealing ring is embedded in the first lower cover plate.

3. A series composite filter element according to claim 2, characterized in that: The coarse filter material is folded filter cloth, filter cotton or a filter material of the same quality as the fine filter material.

4. A series composite filter element according to claim 1, characterized in that: The fine filter assembly includes a second outer net, a second central tube, fine filter material, second upper and lower cover plates, and a second sealing ring. The fine filter material is placed between the second outer net and the second central tube. The second upper and lower cover plates are respectively arranged at the two ends of the second outer net and the second central tube. The second sealing ring is embedded in the second upper cover plate.

5. The series composite filter element according to claim 1, characterized in that: One end of the pressure opening valve is connected to the lower end of the coarse filter assembly and is sealed by a first sealing ring on the first section lower cover plate, and the other end of the pressure opening valve is connected to the upper end of the fine filter assembly and is sealed by a second sealing ring on the second section upper cover plate, thereby connecting the coarse filter assembly and the fine filter assembly in series as one.

6. The series composite filter element according to claim 1, characterized in that: A first supporting spring is coaxially arranged on the inner wall of the first central tube, and a second supporting spring is coaxially arranged on the inner wall of the second central tube.

7. The series composite filter element according to claim 1, characterized in that: The length ratio of the coarse filter component to the fine filter component is 1:3-8.

8. The series composite filter element according to claim 1, characterized in that: When the series composite filter element filters the engine oil, the engine oil flows from the outside of the series composite filter element assembly to the inside through the filter material and flows out through the oil outlet at the lower end of the second central tube.

9. The series composite filter element according to claim 1, characterized in that: ①When the working pressure is lower than the threshold, only the fine filter component of the series composite filter element works; ② When the working pressure exceeds the threshold, the pressure opening valve opens, and the engine oil passes through the coarse filter component and the fine filter component of the series composite filter element at the same time, that is, the coarse filter component and the fine filter component work at the same time.

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