Oil filter with high sealing performance and multi-stage filtration
By employing a high-sealing design and a multi-stage filter structure, the problem of insufficient sealing and filtration effect in oil filters is solved, achieving efficient oil filtration and sealing. It is suitable for multi-stage filtration of lubricating oil and hydraulic oil in industrial production.
Patent Information
- Application Number
- CN202520371297.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-03-05
AI Technical Summary
Existing oil filters have poor sealing, which makes the oil susceptible to contamination by external impurities during the filtration process, and the filtration effect is limited, especially under high load conditions where performance deteriorates.
It adopts a high-sealing design, including an inner ring bushing and support ring structure, combined with multi-stage filter element filtration, to enhance sealing and achieve two-stage filtration, preventing oil leakage and external contamination, while maintaining filtration effect under high load.
It improves the sealing and filtration effect of the oil filter, avoids oil leakage and external pollution, ensures oil quality, and extends the service life of the equipment.
Smart Images
Figure CN223788138U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of oil filter technology, specifically to a high-sealing multi-stage filtration oil filter. Background Technology
[0002] In industrial production and mechanical equipment operation, lubricating oil and hydraulic oil need to be filtered by an oil filter before being returned to the equipment for repeated use. However, traditional oil filters have poor sealing performance, which makes the oil susceptible to secondary contamination by external impurities during the filtration process and makes it difficult to effectively remove fine particulate impurities. Therefore, in order to ensure oil quality and meet the demand for high-precision filtration in industrial production, we propose a high-sealing multi-stage filtration oil filter.
[0003] The existing technology still has the following drawbacks in its use:
[0004] The sealing performance of existing oil filters is not ideal, which not only makes oil leakage easy, but also allows dust and moisture to enter the oil filter, contaminating the internal oil and affecting its performance.
[0005] Existing oil filters have limited filtration efficiency, typically featuring only a single-stage filtration structure. This results in a gradual deterioration of filtration performance under high-load conditions, ultimately leading to ineffective oil filtration.
[0006] In view of this, we propose a high-sealing, multi-stage filtration oil filter to solve the existing problems. Utility Model Content
[0007] The purpose of this invention is to provide a high-sealing, multi-stage filtration oil filter to solve the problems mentioned in the background art.
[0008] To achieve the above objectives, this utility model provides the following technical solution: a high-sealing multi-stage filtration oil filter, comprising an upper frame, a lower frame and a filter cylinder, wherein two sets of support frames are fixedly installed on the inner side of the lower frame;
[0009] A filter cylinder is fixedly installed on the inner side of the lower frame, and the side wall of the filter cylinder is fixedly connected to the support frame. A mounting cover is fixedly installed on the top of the filter cylinder, and two sets of sealing grooves are provided inside the mounting cover. Inner ring bushings are fixedly installed on the top and bottom of the mounting cover. A limiting ring is fixedly installed near the edge of the top of the mounting cover. Support rings are fixedly installed at equal intervals on the inner side of the limiting ring. The support rings are semi-circular hollow structures, and one side of the support rings is in contact with the inner ring bushing. A primary filter element is fixedly installed inside the filter cylinder. The top of the primary filter element extends out of the mounting cover, and a sealing cover is fixedly installed on the top of the primary filter element. An oil drain valve is fixedly installed at the bottom of the filter cylinder, and a return pipe is fixedly installed at the bottom of the oil drain valve.
[0010] An upper frame is fixedly installed on the top of the lower frame, and an oil pump is fixedly installed on the top of the upper frame. An infusion pipe is fixedly installed on the left side of the oil pump, and a guide pipe is fixedly installed on the right side of the oil pump.
[0011] Preferably, two sets of support feet are fixedly installed on both sides of the bottom of the lower frame, and the support feet extend three to five centimeters beyond the edge of the lower frame.
[0012] Preferably, a solenoid valve is fixedly installed at the end of the return pipe away from the drain valve, and the diameter of the return pipe is the same as the diameter of the guide pipe, and the return pipe is connected to the guide pipe.
[0013] Preferably, a secondary filter element is fixedly installed on the outside of the primary filter element, and a filter screen is fixedly installed at the bottom inside the filter cylinder.
[0014] Preferably, an inlet pipe is fixedly installed on the left side of the front of the oil pump, and a drain pipe is fixedly installed on the right side of the front of the oil pump.
[0015] Preferably, both the infusion tube and the guide tube are connected to the sealing cap, and both the infusion tube and the guide tube are fixedly installed with a solenoid valve.
[0016] Compared with the prior art, the beneficial effects of this utility model are:
[0017] This invention improves the sealing performance of the oil filter by installing inner ring bushings at the top and bottom of the mounting cover. The inner ring bushings cooperate with the mounting cover to improve the sealing performance of the oil filter. The two sets of sealing grooves inside the mounting cover can effectively store oil that leaks into the mounting cover, or provide storage space for dust and moisture that seep into the mounting cover. Furthermore, the two sealing covers are isolated from each other, thereby improving the sealing performance between the mounting cover and the primary filter element.
[0018] This invention features several support rings and limiting rings installed on the outer side of the inner ring bushing. The elasticity of the support rings continuously applies pressure to the inner ring bushing towards the primary filter element, thereby helping the inner ring bushing maintain its sealing performance and further improving the sealing performance of the device. This effectively prevents the oil inside the oil filter from being contaminated by dust and moisture from the external environment.
[0019] This invention improves the filtration effect of the oil filter by installing a secondary filter element on the outside of the primary filter element. This allows the oil to be filtered again after being filtered by a conventional filter element, thereby avoiding the decline in filtration performance of the oil filter under high load conditions and improving the load-bearing capacity of the oil filter. Attached Figure Description
[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0021] Figure 2 This is a schematic diagram of the front external structure of this utility model;
[0022] Figure 3 This is a three-dimensional internal structure diagram of the present invention;
[0023] Figure 4 This is a partial three-dimensional cross-sectional structural diagram of the present invention;
[0024] Figure 5 for Figure 3 A magnified view of the structure at point A in the middle;
[0025] Figure 6 This is a partial front cross-sectional view of the present invention.
[0026] In the diagram: 1. Upper frame; 101. Oil pump; 102. Infusion pipe; 103. Guide pipe; 104. Inlet pipe; 105. Drain pipe; 2. Lower frame; 201. Support frame; 202. Support foot; 3. Filter cartridge; 301. Oil drain valve; 302. Return pipe; 303. Support ring; 304. Limiting ring; 305. Inner ring bushing; 306. Sealing cap; 307. Mounting cap; 308. Secondary filter element; 309. Primary filter element; 310. Filter screen. Detailed Implementation
[0027] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0028] like Figure 1 - Figure 6As shown, the present invention proposes a high-sealing multi-stage filtration oil filter, which includes an upper frame 1, a lower frame 2 and a filter cartridge 3. Two sets of support frames 201 are fixedly installed on the inner side of the lower frame 2. The lower frame 2 can provide installation positions for the surrounding components, and the support frames 201 can support the filter cartridge 3, thereby ensuring the installation stability of the filter cartridge 3.
[0029] A filter cartridge 3 is fixedly installed on the inner side of the lower frame 2, and the side wall of the filter cartridge 3 is fixedly connected to the support frame 201. A mounting cover 307 is fixedly installed on the top of the filter cartridge 3, and two sets of sealing grooves are provided inside the mounting cover 307. Inner ring bushings 305 are fixedly installed on the top and bottom of the mounting cover 307. A limit ring 304 is fixedly installed near the edge of the top of the mounting cover 307. Support rings 303 are fixedly installed at equal intervals on the inner side of the limit ring 304. The support rings 303 have a semi-circular hollow structure, and one side of the support rings 303 abuts against the inner ring bushings 305. A primary filter element 30 is fixedly installed inside the filter cartridge 3. 9. A mounting cover 307 extends from the top of the primary filter element 309, and a sealing cover 306 is fixedly installed on the top of the primary filter element 309. An oil drain valve 301 is fixedly installed at the bottom of the filter cartridge 3, and a return pipe 302 is fixedly installed at the bottom of the oil drain valve 301. The filter cartridge 3 provides mounting positions for surrounding components. The mounting cover 307 can limit and fix the primary filter element 309. Furthermore, the two sets of sealing grooves inside the mounting cover 307 can improve the sealing performance at the contact point between the mounting cover 307 and the primary filter element 309. Combined with the inner ring bushing 305, the sealing performance at the joint is improved, preventing leakage inside the filter cartridge 3. The moving oil is contaminated by dust and moisture in the external environment. A limiting ring 304 is used to install and limit several support rings 303, causing the support rings 303 to continuously apply elastic force to the inner ring bushing 305. This forces the inner ring bushing 305 towards the primary filter element 309, further improving the sealing at the joint between the primary filter element 309 and the inner ring bushing 305. The primary filter element 309 performs initial filtration of the oil entering the sealing cover 306, allowing the oil to be discharged after primary filtration. The oil then undergoes secondary filtration through the secondary filter element 308, improving the filtration effect of the oil filter while preventing... When the oil filter is under high load, the primary filter element 309 may become clogged, affecting the overall filtration effect of the oil filter. The sealing cover 306 can be connected to the infusion pipe 102 and the guide pipe 103, so that the oil pump 101 can inject oil into the sealing cover 306. The components inside the filter cartridge 3 can filter the oil. The sealing cover 306 is equipped with a bypass valve, which can return the oil to the oil pump 101 through the guide pipe 103 when the filter cartridge 3 becomes clogged, so as not to affect the flow of oil and prevent the oil from being continuously pumped into the sealing cover 306 and the filter cartridge 3, which could damage the components inside the filter cartridge 3 and the sealing cover 306.
[0030] The upper frame 1 is fixedly installed on the top of the lower frame 2. The oil pump 101 is fixedly installed on the top of the upper frame 1. The infusion pipe 102 is fixedly installed on the left side of the oil pump 101, and the guide pipe 103 is fixedly installed on the right side of the oil pump 101. The upper frame 1 can provide installation positions for the surrounding components. The oil pump 101 adopts the 47201-10 type. The oil pump 101 can be connected to an external pipeline, thereby promoting the oil to flow at a uniform speed inside the oil filter, so that the oil is filtered by the oil filter. The infusion pipe 102 enables the oil pump 101 to pump the oil into the sealing cover 306. The guide pipe 103 enables the oil inside the sealing cover 306 to flow back to the oil pump 101.
[0031] Furthermore, two sets of support feet 202 are fixedly installed on both sides of the bottom of the lower frame 2, and the support feet 202 extend three to five centimeters beyond the edge of the lower frame 2. The support feet 202 can support the lower frame 2 and its internal components, thereby ensuring the stability of the lower frame 2, its internal components, and the components installed on the top.
[0032] Furthermore, a solenoid valve is fixedly installed at the end of the return pipe 302 away from the drain valve 301, and the diameter of the return pipe 302 is the same as the diameter of the guide pipe 103. The return pipe 302 is connected to the guide pipe 103, and the solenoid valve can control the opening and closing of the return pipe 302 and the guide pipe 103, thereby controlling the flow of oil in different pipelines.
[0033] Furthermore, a secondary filter element 308 is fixedly installed on the outside of the primary filter element 309, and a filter screen 310 is fixedly installed at the bottom inside the filter cylinder 3. The secondary filter element 308 can filter the oil after the primary filter element 309 is filtered again, thereby improving the filtration effect of the oil filter. The filter screen 310 can perform coarse filtration again on the oil after the secondary filter element 308 is filtered, while preventing impurities in the return pipe 302 from being carried into the filter cylinder 3 when the oil flows back.
[0034] Furthermore, an inlet pipe 104 is fixedly installed on the left side of the front of the oil pump 101, and a drain pipe 105 is fixedly installed on the right side of the front of the oil pump 101. The inlet pipe 104 and the drain pipe 105 can be connected to the equipment pipeline, so that the unfiltered oil is drawn into the oil filter by the oil pump 101 through the inlet pipe 104, and the filtered oil is returned to the equipment pipeline through the drain pipe 105.
[0035] Furthermore, both the infusion pipe 102 and the guide pipe 103 are connected to the sealing cover 306. Solenoid valves are fixedly installed on both the infusion pipe 102 and the guide pipe 103. After the sealing cover 306 is connected to the infusion pipe 102 and the guide pipe 103 through the solenoid valves, it can control the flow of oil in different directions inside the oil filter according to the usage requirements of the oil filter, thereby achieving different functions.
[0036] Working principle: After the device is assembled, the oil is drawn out by the oil pump 101 and pumped into the sealing cover 306 through the delivery pipe 102. The guide pipe 103 is closed and the return pipe 302 is opened, so that the oil passes through the first-stage filter element 309 and enters the filter cartridge 3. After the oil is filtered by the first-stage filter element 309 and the second-stage filter element 308, the filtered oil enters the oil pump 101 through the return pipe 302 and then enters the equipment through the drain pipe 105 for repeated use.
[0037] When a blockage occurs in the filter cartridge 3, the bypass valve in the sealing cover 306 controls the opening of the guide pipe 103, so that the oil does not pass through the filter cartridge 3 but returns to the sealing cover 306 through the guide pipe 103, and then flows back to the equipment through the drain pipe 105.
[0038] During the operation of the oil filter, the support ring 303 applies pressure to the inner ring bushing 305, ensuring that the inner ring bushing 305 remains in close contact with the side wall of the primary filter element 309. Combined with the two sets of sealing grooves inside the mounting cover 307, the joint between the mounting cover 307 and the primary filter element 309 is effectively sealed, preventing oil from seeping out from the joint between the mounting cover 307 and the primary filter element 309. At the same time, it prevents dust and moisture from the external environment from entering the filter cartridge 3 and contaminating the oil.
[0039] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.
Claims
1. A high-sealing multi-stage filtration oil purifier comprising an upper frame (1), a lower frame (2) and a filter cartridge (3), characterized in that: The inner side of the lower frame (2) is fixedly installed with two groups of support frames (201); The inner side of the lower frame (2) is fixedly installed with a filter cylinder (3), and the side wall of the filter cylinder (3) is fixedly connected with the support frame (201); the top of the filter cylinder (3) is fixedly installed with a mounting cover (307), and two groups of sealing grooves are arranged in the mounting cover (307); the top and the bottom of the mounting cover (307) are fixedly installed with inner ring bushings (305); a limiting ring (304) is fixedly installed at the position close to the edge of the top of the mounting cover (307); a plurality of support rings (303) are fixedly installed at the inner side of the limiting ring (304) at equal intervals; the support ring (303) is a semicircular hollow structure, and one side of the support ring (303) is in abutting connection with the inner ring bushing (305); a primary filter core (309) is fixedly installed in the filter cylinder (3); the top end of the primary filter core (309) extends out of the mounting cover (307), and a sealing cover (306) is fixedly installed at the top of the primary filter core (309); an oil drain valve (301) is fixedly installed at the bottom of the filter cylinder (3), and a return pipe (302) is fixedly installed at the bottom of the oil drain valve (301). The top of the lower frame (2) is fixedly installed with an upper frame (1), the top of the upper frame (1) is fixedly installed with an oil pump (101), the left side of the oil pump (101) is fixedly installed with a transfusion pipe (102), and the right side of the oil pump (101) is fixedly installed with a flow guide pipe (103).
2. The high containment multi-stage filtered oil purifier of claim 1, wherein: The bottom of the lower frame (2) is fixedly installed with two groups of support feet (202), and the support feet (202) extend out of the edge of the lower frame (2) by three to five centimeters.
3. The high containment multi-stage filtered oil purifier of claim 1, wherein: The end of the return pipe (302) away from the oil drain valve (301) is fixedly installed with an electromagnetic valve, and the pipe diameter of the return pipe (302) is consistent with the pipe diameter of the flow guide pipe (103); the return pipe (302) is connected with the flow guide pipe (103).
4. The high containment multi-stage filtered oil purifier of claim 1, wherein: The outer side of the primary filter core (309) is fixedly installed with a secondary filter core (308), and the bottom of the inside of the filter cylinder (3) is fixedly installed with a filter screen (310).
5. The high containment multi-stage filtered oil purifier of claim 1, wherein: The front left side of the oil pump (101) is fixedly installed with an inlet pipe (104), and the front right side of the oil pump (101) is fixedly installed with a drain pipe (105).
6. The high containment multi-stage filtered oil purifier of claim 1, wherein: The transfusion pipe (102) and the flow guide pipe (103) are connected with the sealing cover (306), and the electromagnetic valves are fixedly installed on the transfusion pipe (102) and the flow guide pipe (103).