An oil absorption filter cartridge replacement structure

Abstract

The utility model relates to oil absorption filter technical field especially an oil absorption filter filter core replacement structure, including cylinder shell, the cylinder shell one end is blocked through the bottom cover, one end is blocked through the upper cover, at least two filter cores of stacking along its axial direction are equipped in the cylinder shell, the filter core of one end portion is connected with the oil inlet of cylinder shell setting, the filter core of one end portion is connected with the oil outlet of upper cover setting, is equipped with fluid transfer subassembly between adjacent filter cores, fluid transfer subassembly with cylinder shell sliding seal, fluid transfer subassembly has the overflow channel that can guide the filtrate of upstream filter core internal chamber to downstream filter core external chamber. This structure when the bottom filter core first jams, only needs to push the filter core and fluid transfer subassembly whole downward, can realize the replacement of single filter core, need not to dismantle all filter cores as a whole. The design effectively avoided the material waste caused by the whole filter core replacement, reduced the maintenance cost, improved the use efficiency of filter core.

Description

Technical Field

[0001] This utility model relates to the field of oil suction filter technology, and in particular to an oil suction filter element replacement structure. Background Technology

[0002] Oil suction filters play a crucial role in oil circulation systems. Their main function is to filter impurities in the oil, preventing solid particles from entering the system and causing component wear or blockage, thus ensuring stable system operation. In conventional filtration devices, filters typically consist of filter elements. As oil flows through the filter element, impurities are trapped on its surface or in its internal pores. After a period of use, the filter element's filtration performance decreases, eventually requiring replacement.

[0003] In actual use, the flow path and velocity distribution of the oil after entering the suction filter are not uniform. Usually, the filter element area near the oil inlet comes into contact with the oil containing more impurities first, so its filter pores become clogged faster; while the filter element part near the oil outlet contains relatively fewer impurities because the oil has already undergone some filtration, so the degree of clogging is less.

[0004] In the existing integrated filter structure, even if only a part of the filter is blocked, the entire filter unit must be replaced, which leads to waste of filter material and increases costs. Utility Model Content

[0005] The purpose of this invention is to solve the problem that replacing the entire filter element unit in the existing technology leads to waste of filter element material and increases costs. Therefore, this invention proposes a filter element replacement structure for an oil suction filter.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An oil suction filter element replacement structure includes a cylindrical shell, one end of which is sealed by a bottom cover and the other end by a top cover. At least two filter elements are stacked along their axial direction inside the cylindrical shell. One end of the filter element is connected to an oil inlet on the cylindrical shell, and the other end is connected to an oil outlet on the top cover. A fluid transfer assembly is provided between adjacent filter elements, and the fluid transfer assembly is slidably sealed to the cylindrical shell. The fluid transfer assembly has a flow channel capable of guiding the filtrate from the internal chamber of the upstream filter element to the external chamber of the downstream filter element.

[0008] The filter element near the top cover has one end abutting against the top cover and the other end abutting against the fluid transfer assembly, and the internal chamber of the filter element is connected to the oil outlet; the filter element near the bottom cover has one end abutting against the bottom cover and the other end abutting against the fluid transfer assembly, and the external chamber of the filter element is connected to the oil inlet.

[0009] The fluid transfer assembly has a flow-diverting cavity, a first hole on one side of the flow-diverting cavity, and a second hole on the other side of the flow-diverting cavity. The flow passage includes the first hole, the flow-diverting cavity, and the second hole. The first hole communicates with the internal chamber of the corresponding filter element, and the second hole communicates with the external chamber of the corresponding filter element.

[0010] The fluid transfer assembly includes a cylindrical body, an upper plate at one end of the cylindrical body, and a lower plate at the other end of the cylindrical body. The cylindrical body is slidably and sealed to the shell. The upper plate is provided with a second hole, and the lower plate is provided with a first hole. There are at least two second holes, and multiple second holes are distributed in a ring around the first hole.

[0011] The lower plate is provided with a pressure relief assembly, which can connect the external chamber upstream of it with the diversion chamber.

[0012] The pressure relief assembly includes a thrust spring and an annular plate. The lower plate has a third hole on the side of the first hole, and the lower plate covers the third hole. One end of the thrust spring abuts against the lower plate and the other end abuts against the upper plate.

[0013] The thrust spring is a conical spring.

[0014] This invention proposes a filter element replacement structure for an oil suction filter. The advantages are as follows: when the bottom filter element becomes clogged first, the individual filter element can be replaced simply by pushing the filter element and fluid transfer assembly downwards, eliminating the need to disassemble all filter elements. This design effectively avoids material waste caused by replacing all filter elements at once, reduces maintenance costs, and improves the efficiency of filter element use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the oil flow state structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the filter element replacement state structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the three-dimensional structure of the fluid transfer component according to the first embodiment of this utility model. Figure 1 ;

[0018] Figure 4 This is a schematic diagram of the three-dimensional structure of the fluid transfer component according to the first embodiment of this utility model. Figure 2 ;

[0019] Figure 5 This is a schematic diagram of the fluid transfer component structure according to the second embodiment of this utility model.

[0020] In the diagram: 1. Bottom cover; 2. Oil inlet; 3. First hole; 4. Diversion chamber; 5. Second hole; 6. External chamber; 7. Internal chamber; 8. Top cover; 9. Oil outlet; 10. Filter element; 11. Shell; 12. Flow channel; 13. Fluid transfer assembly; 14. Third hole; 15. Upper plate; 16. Thrust spring; 17. Annular plate; 18. Lower plate; 19. Cylinder body. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figures 1-5 An oil suction filter element replacement structure includes a cylindrical shell 11, one end of which is sealed by a bottom cover 1 and the other end by a top cover 8. The shell 11 can be assembled by a threaded connection. At least two filter elements 10 are stacked along its axial direction inside the cylindrical shell 11. One end of the filter element 10 is connected to the oil inlet 2 of the cylindrical shell 11, and the other end of the filter element 10 is connected to the oil outlet 9 of the top cover 8. A fluid transfer assembly 13 is provided between adjacent filter elements 10. The fluid transfer assembly 13 is slidably sealed with the cylindrical shell 11. A limiting structure can be set between the fluid transfer assembly 13 and the filter element 10 as needed to play a positioning role. The fluid transfer assembly 13 has a flow channel 12 that can guide the filtrate in the internal chamber 7 of the upstream filter element 10 to the external chamber 6 of the downstream filter element 10.

[0023] refer to Figure 1 When the oil enters the casing 11 through the inlet 2, it first flows into the outer chamber 6 of the filter element 10 located near the bottom cover 1. Under the filtration action of the filter element 10, impurities in the oil are trapped. The filtered oil then flows through the inner chamber 7 of the filter element 10 into the fluid transfer assembly 13 located above it. The fluid transfer assembly 13 has a flow channel 12 inside, which guides the filtrate from the inner chamber 7 of the lower filter element 10 to the outer chamber 6 of the upper filter element 10, allowing the oil to pass through multiple filter elements 10 for continuous filtration. With prolonged use, the filter element 10 located at the bottom, near the inlet 2, experiences faster clogging because it comes into contact with the oil containing more impurities first, while the upper filter element 10 experiences relatively less clogging. When replacing, refer to... Figure 2 Open the bottom cover 1 and the top cover 8, and use external force to push all the filter elements 10 along with the fluid transfer assembly 13 downwards one position, so that the bottom filter element 10 and its corresponding fluid transfer assembly 13 are pushed out of the shell 11. Then, insert the new filter element 10 and the pushed-out fluid transfer assembly 13 into the shell 11 from the top, thus completing the filter element replacement. This replacement method replaces the heavily clogged filter element 10, while the lightly clogged filter element 10 continues to be used, achieving full utilization of each filter element 10.

[0024] When the bottom filter element 10 becomes clogged first, this design allows for the replacement of a single filter element 10 simply by pushing the filter element 10 and the fluid transfer assembly 13 downwards as a whole, without the need to disassemble all filter elements 10. This design effectively avoids material waste caused by replacing all filter elements at once, reduces maintenance costs, and improves the efficiency of filter element 10 usage.

[0025] refer to Figure 1 , Figure 5 The filter element 10 near the top cover 8 has one end against the top cover 8 and the other end against the fluid transfer assembly 13, and the internal chamber 7 of the filter element 10 is connected to the oil outlet 9; the filter element 10 near the bottom cover 1 has one end against the bottom cover 1 and the other end against the fluid transfer assembly 13, and the external chamber 6 of the filter element 10 is connected to the oil inlet 2.

[0026] The filter element 10 near the upper cover 8 has its upper end attached to the upper cover 8 and its lower end attached to the fluid transfer assembly 13. Its internal chamber 7 is connected to the oil outlet 9 for outputting filtered oil. The filter element 10 near the bottom cover 1 has its lower end attached to the bottom cover 1 and its upper end attached to the fluid transfer assembly 13. Its external chamber 6 is connected to the oil inlet 2 for receiving oil containing impurities to be filtered.

[0027] The fluid transfer assembly 13 has a flow diversion chamber 4, a first hole 3 located on one side of the flow diversion chamber 4, and a second hole 5 located on the other side of the flow diversion chamber 4. The flow passage 12 includes the first hole 3, the flow diversion chamber 4, and the second hole 5. The first hole 3 is connected to the internal chamber 7 of the corresponding filter element 10, and the second hole 5 is connected to the external chamber 6 of the corresponding filter element 10.

[0028] The first hole 3 is connected to the internal chamber 7 of the corresponding filter element 10, and the second hole 5 is connected to the external chamber 6 of the adjacent filter element 10, so that the oil filtered by the lower filter element 10 can be introduced into the upper filter element 10 for further filtration through the diversion chamber 4.

[0029] The fluid transfer assembly 13 includes a cylindrical section 19, an upper plate section 15 located at one end of the cylindrical section 19, and a lower plate section 18 located at the other end of the cylindrical section 19. Multiple sealing rings can be installed on the outer circumference of the cylindrical section 19. The cylindrical section 19 is slidably sealed to the shell 11. The upper plate section 15 is provided with a second hole 5, and the lower plate section 18 is provided with a first hole 3. There are at least two second holes 5, and the multiple second holes 5 are arranged in a ring around the first hole 3. The multiple second holes 5 on the upper plate section 15 and the first hole 3 on the lower plate section 18, arranged in a ring around the first hole 3, are used to achieve uniform distribution and conduction of the filtrate.

[0030] refer to Figure 5The lower plate 18 is provided with a pressure relief assembly, which can connect the external chamber 6 upstream of it with the diversion chamber 4. The pressure relief assembly includes a thrust spring 16 and an annular plate 17. The lower plate 18 has a third hole 14 on the side around the first hole 3. The lower plate 18 covers the third hole 14. One end of the thrust spring 16 abuts against the lower plate 18 and the other end abuts against the upper plate 15. The thrust spring 16 is a conical spring.

[0031] A pressure relief assembly is installed on the lower plate 18. When the upstream filter element 10 becomes clogged, causing the oil pressure in the external chamber 6 to rise, the pressure acts on the annular plate 17, causing the annular plate 17 to move upward against the elastic force of the thrust spring 16, thereby opening the passage of the third hole 14. At this time, the high-pressure oil in the external chamber 6 enters the diversion chamber 4 through the third hole 14, and then flows into the external chamber 6 of the downstream filter element 10 through the second hole 5, realizing the bypass and pressure relief of the oil. This avoids the problem of system oil supply interruption or pump dry running caused by filter element clogging, and plays an emergency role.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any technical solution, concept, or design obtained by those skilled in the art by making equivalent substitutions or changes based on the technical solution and utility model concept disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A filter element replacement structure for an oil suction filter, comprising a cylindrical shell (11), wherein one end of the cylindrical shell (11) is sealed by a bottom cover (1) and the other end is sealed by a top cover (8), characterized in that, The shell (11) is provided with at least two filter elements (10) stacked along its axis. One end of the filter element (10) is connected to the oil inlet (2) of the shell (11), and the other end of the filter element (10) is connected to the oil outlet (9) of the top cover (8). A fluid transfer assembly (13) is provided between adjacent filter elements (10). The fluid transfer assembly (13) is slidably sealed to the shell (11). The fluid transfer assembly (13) has a flow channel (12) that can guide the filtrate in the inner chamber (7) of the upstream filter element (10) to the outer chamber (6) of the downstream filter element (10).

2. The oil suction filter element replacement structure according to claim 1, characterized in that, The filter element (10) near the upper cover (8) has one end against the upper cover (8) and the other end against the fluid transfer assembly (13), and the internal chamber (7) of the filter element (10) is connected to the oil outlet (9); the filter element (10) near the bottom cover (1) has one end against the bottom cover (1) and the other end against the fluid transfer assembly (13), and the external chamber (6) of the filter element (10) is connected to the oil inlet (2).

3. The oil suction filter element replacement structure according to claim 1 or 2, characterized in that, The fluid transfer assembly (13) has a flow divider (4), a first hole (3) on one side of the flow divider (4), and a second hole (5) on the other side of the flow divider (4). The flow passage (12) includes the first hole (3), the flow divider (4), and the second hole (5). The first hole (3) is connected to the internal chamber (7) of the corresponding filter element (10), and the second hole (5) is connected to the external chamber (6) of the corresponding filter element (10).

4. The oil suction filter element replacement structure according to claim 3, characterized in that, The fluid transfer assembly (13) includes a cylindrical part (19), an upper plate part (15) located at one end of the cylindrical part (19), and a lower plate part (18) located at the other end of the cylindrical part (19). The cylindrical part (19) is slidably sealed to the cylindrical shell (11). The upper plate part (15) is provided with a second hole (5), and the lower plate part (18) is provided with a first hole (3). There are at least two second holes (5), and multiple second holes (5) are distributed in a ring around the first hole (3).

5. The oil suction filter element replacement structure according to claim 4, characterized in that, The lower plate (18) is provided with a pressure relief assembly, which is able to connect the external chamber (6) upstream of it with the diversion chamber (4).

6. The oil suction filter element replacement structure according to claim 5, characterized in that, The pressure relief assembly includes a thrust spring (16) and an annular plate (17). The lower plate (18) has a third hole (14) on the side of the first hole (3). The lower plate (18) covers the third hole (14). One end of the thrust spring (16) abuts against the lower plate (18) and the other end abuts against the upper plate (15).

7. The oil suction filter element replacement structure according to claim 6, characterized in that, The thrust spring (16) is a conical spring.

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