Oil filter with multiple filter elements and multiple bypass valves

Abstract

The utility model discloses an engine oil filter with multiple filter elements and multiple bypass valves, which comprises a shell and a filtering cover assembled at one end of the shell, and further comprises a supporting mechanism used for forming a built-in supporting structure, a filtering mechanism used for forming a multi-filter element structure and a bypass mechanism used for forming a bypass oil path, the supporting mechanism is arranged in the shell, the filtering mechanism is assembled on the side portion of the supporting mechanism, and the bypass mechanism is arranged between the supporting mechanism and the filtering mechanism. The air purifier has the advantages that the structure is simple, the supporting mechanism is arranged, the filtering mechanism can be conveniently disassembled, assembled and overhauled while the working stability of the filtering mechanism can be improved, and the filtering mechanism is arranged, so that the filtering efficiency is improved. The multi-filter element structure is adopted, oil liquid can be filtered in a staged mode, the filtering effect is good, the single filter element structure can be disassembled, assembled and replaced, the use flexibility is high, the bypass mechanism is arranged, multiple sets of bypass oil ways can be formed when filter paper is blocked, and normal operation of equipment is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of oil filter technology, and in particular to an oil filter with multiple filter elements and multiple bypass valves. Background Technology

[0002] In existing technology, the oil filter, also known as an oil strainer, is used to remove impurities such as dust, metal particles, carbon deposits, and soot particles from the engine oil, protecting the engine. It is an important component of internal combustion engine power equipment such as vehicles, construction machinery, and ships. During the operation of an internal combustion engine, the engine oil in the lubrication system not only lubricates the parts but also cleans impurities from the parts, preventing them from damaging them. The function of the oil filter is to filter out impurities in the engine oil, ensuring oil cleanliness, preventing secondary contamination of parts by impurities, protecting internal combustion engine components, and extending their service life. Generally, for the design of oil filters, the smaller the size, the better, while meeting performance requirements, as this saves both space and cost. The bypass valve, as an indispensable part of the oil filter, is used when the filter element in the oil filter is clogged. When a certain pressure difference is reached between the oil inlet and outlet of the filter, the bypass valve opens, allowing the oil to flow directly into the main lubrication passage without passing through the filter element, thus ensuring the normal lubrication of the entire engine. When the filter paper of an existing oil filter becomes clogged with impurities during long-term use, the oil will be compressed by squeezing the multi-bypass valve, thus ensuring normal oil flow. Although the oil quality cannot be guaranteed, it can ensure the normal operation of the equipment. However, in actual use, if the multi-bypass valve malfunctions and cannot be compressed normally, the oil cannot be delivered normally, which may lead to equipment damage.

[0003] Chinese utility model patent application number 202122120162.7 discloses an oil filter with multiple filter elements and multiple bypass valves, including a filter body with a central tube inside. Two fixing mechanisms are located inside the filter body, one at the top and one at the bottom of the central tube, respectively, penetrating the top and bottom of the filter body and extending to the outside. Each fixing mechanism includes a cavity located at the top of the filter body. However, this oil filter with multiple filter elements and multiple bypass valves has an overly complex structure. Damage to any component during operation will cause the filter to malfunction, resulting in poor operational stability and a short service life. Furthermore, the filter elements are composed of a single unit, making it impossible to disassemble and replace individual filter elements, thus limiting its flexibility. Utility Model Content

[0004] The purpose of this invention is to provide an oil filter with multiple filter elements and multiple bypass valves.

[0005] To achieve the above objectives, the technical solution proposed by this utility model is as follows:

[0006] An oil filter with multiple filter elements and multiple bypass valves includes a housing and a filter cover, the filter cover being assembled at one end of the housing. It also includes a support mechanism for forming an internal support structure, a filter mechanism for forming a multi-filter element structure, and a bypass mechanism for forming a bypass oil passage. The support mechanism is arranged inside the housing, the filter mechanism is assembled on the side of the support mechanism, and the bypass mechanism is disposed between the support mechanism and the filter mechanism.

[0007] The support mechanism includes a support core rod, a support spring, and a support base plate. The support core rod is disposed inside the housing and one end of it is fixedly connected to the end of the housing. The support spring is disposed at the end of the support core rod connected to the housing and is sleeved with the support core rod. One end of the support spring abuts against the housing. The support base plate is disposed at the end of the support spring away from the housing and is fixedly connected with the support spring. The support base plate is sleeved with the support core rod.

[0008] The end of the support core rod away from the support spring is provided with an oil outlet channel, and the end of the support base plate away from the support spring is provided with a limiting seat corresponding to the filtration mechanism.

[0009] The filtration mechanism includes a filter end plate, a filter assembly, and a filter end cap. The filter end plate is disposed at the end of the support base plate away from the support spring and is engaged with the support base plate by a limiting bracket. The filter assembly is assembled on the side of the filter end plate away from the support base plate. The filter end cap is disposed at the end of the filter assembly away from the filter end plate and is sleeved with the support core rod.

[0010] The filter assembly includes an outer filter screen, an inner filter screen, and a filter element body. The outer filter screen is disposed on the side of the filter end plate away from the support substrate and is fixedly connected to the filter end plate. The inner filter screen is disposed on the side of the filter end plate away from the support substrate and is fixedly connected to the filter end plate. The inner filter screen is located inside the outer filter screen and is coaxially arranged with the outer filter screen. A filter paper structure is disposed on the inner side of the inner filter screen. The filter element body is assembled between the outer filter screen and the inner filter screen.

[0011] It also includes a filter element holder and a filter element cover. The filter element holder is located on the side of the filter end plate near the filter screen and is fixedly connected to the filter end plate. The end of the filter element body near the filter end plate is snapped into the filter element holder. The filter element cover is located on the side of the filter end cover away from the filter element body and is snapped into the filter end cover.

[0012] The bypass mechanism includes a mounting ring, a bypass spring, and a bypass valve block. The mounting ring is disposed on the side of the support base plate near the support spring and is fixedly connected to the support base plate. The bypass spring is disposed on the side of the mounting ring away from the bypass spring, and one end of the bypass spring is fixedly connected to the bypass spring. The support base plate has a mounting through hole corresponding to the bypass spring, and the bypass spring is located in the mounting through hole. The bypass valve block is disposed on the end of the bypass spring away from the mounting ring and is fixedly connected to the bypass spring. The bypass valve block is embedded in the mounting through hole.

[0013] The bypass mechanism is provided in several groups, and the several groups of bypass mechanisms are evenly spaced and arranged in a ring on the support base plate, with the bypass valve block located inside the limit seat.

[0014] It also includes an oil inlet and an oil outlet. The oil inlet is located on the side of the filter cover away from the outer shell and is fixedly connected to the filter cover. The oil inlet communicates with the inside of the filter cover. The oil outlet is located in the middle of the side of the filter cover away from the outer shell and is fixedly connected to the filter cover. The oil outlet communicates with the oil outlet channel on the support core rod.

[0015] It also includes an exhaust valve, which is located on the side of the filter cover away from the housing and is fixedly connected to the filter cover.

[0016] The beneficial effects of this utility model are:

[0017] With a simple structure and a support mechanism, the filtration mechanism can be installed inside the housing and supported, thereby improving the working stability of the filtration mechanism and facilitating its disassembly and maintenance. The filtration mechanism adopts a multi-filter element structure, which can perform graded filtration of oil with good filtration effect. Individual filter elements can be disassembled and replaced, making it highly flexible in use. A bypass mechanism is also provided, which can form multiple bypass oil circuits when the filter paper is clogged, ensuring the normal operation of the equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a cross-sectional view of the support mechanism and the outer shell of this utility model.

[0020] Figure 3 This is a schematic diagram of the fit between the filter element cover and the filter end cover of this utility model;

[0021] Figure 4 This is a cross-sectional view of the bypass mechanism and the supporting base plate of this utility model.

[0022] Figure 5 This is a schematic diagram of the fit between the exhaust valve and the filter cover of this utility model.

[0023] In the diagram: 1. Outer shell; 2. Filter cover; 3. Support rod; 4. Support spring; 5. Support base plate; 6. Filter end plate; 7. Filter end cap; 8. Filter outer mesh; 9. Filter inner mesh; 10. Filter element body; 11. Filter element holder; 12. Filter element cover; 13. Mounting ring; 14. Bypass spring; 15. Bypass valve block; 16. Oil inlet; 17. Oil outlet; 18. Exhaust valve. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings.

[0025] An oil filter with multiple filter elements and multiple bypass valves includes a housing 1 and a filter cover 2. The filter cover 2 is assembled at one end of the housing 1. It also includes a support mechanism for forming an internal support structure, a filter mechanism for forming a multi-filter element structure, and a bypass mechanism for forming a bypass oil passage. The support mechanism is arranged inside the housing 1, the filter mechanism is assembled on the side of the support mechanism, and the bypass mechanism is disposed between the support mechanism and the filter mechanism. A schematic diagram of the overall structure of this utility model is shown below. Figure 1 As shown.

[0026] The support mechanism includes a support core rod 3, a support spring 4, and a support base plate 5. The support core rod 3 is disposed inside the outer casing 1, and one end of it is fixedly connected to the end of the outer casing 1. The support spring 4 is disposed at the end of the support core rod 3 connected to the outer casing 1 and is sleeved with the support core rod 3. One end of the support spring 4 abuts against the outer casing 1. The support base plate 5 is disposed at the end of the support spring 4 away from the outer casing 1 and is fixedly connected with the support spring 4. The support base plate 5 is sleeved with the support core rod 3. The end of the support core rod 3 away from the support spring 4 is provided with an oil outlet channel. The end of the support base plate 5 away from the support spring 4 is provided with a limiting seat corresponding to the filter mechanism. The support mechanism, through the cooperation of the support core rod 3, the support spring 4, and the support base plate 5, forms the mounting structure inside the outer casing 1. The structure provides support for the filtration mechanism. The support core rod 3 provides mounting support for the support spring 4 and the filtration mechanism. The support spring 4 provides elastic support for the support base plate 5. The support base plate 5 provides support for the filtration mechanism under the action of the support spring 4 and also provides mounting support for the bypass mechanism. The oil outlet channel serves as the oil outlet structure on the support core rod 3. Filtered oil can enter the oil outlet 17 through the oil outlet channel and then be discharged from the filter. The limiting claw serves as a limiting structure on the support base plate 5, thereby providing limiting support for the filtration mechanism to ensure the installation stability between the filtration mechanism and the support base plate 5. A cross-sectional view of the support mechanism and the outer shell 1 of this utility model is shown below. Figure 2 As shown.

[0027] The filtration mechanism includes a filter end plate 6, a filter assembly, and a filter end cover 7. The filter end plate 6 is located at the end of the support base plate 5 away from the support spring 4 and is engaged with the support base plate 5 through a limiting bracket. The filter end plate 6 is sleeved on the side of the support core rod 3 through the support base plate 5. The filter assembly is assembled on the side of the filter end plate 6 away from the support base plate 5. The filter end cover 7 is located at the end of the filter assembly away from the filter end plate 6 and is sleeved with the support core rod 3. The filtration mechanism, through the cooperation of the filter end plate 6, the filter assembly, and the filter end cover 7, performs graded filtration of the oil entering the filter. The filter end plate 6 provides installation support for the filter assembly, the filter assembly forms a multi-stage filtration structure to perform graded filtration of the oil entering the filter, and the filter end cover 7 cooperates with the filter end plate 6 to provide installation support for the filter assembly and meet the needs of disassembly and replacement of the filter assembly.

[0028] The filter assembly includes an outer filter screen 8, an inner filter screen 9, and a filter element body 10. The outer filter screen 8 is disposed on the side of the filter end plate 6 away from the support substrate 5 and is fixedly connected to the filter end plate 6. The inner filter screen 9 is disposed on the side of the filter end plate 6 away from the support substrate 5 and is fixedly connected to the filter end plate 6. The inner filter screen 9 is located inside the outer filter screen 8 and is coaxially arranged with the outer filter screen 8. A filter paper structure is disposed on the inner side of the inner filter screen 9. The filter element body 10 is assembled between the outer filter screen 8 and the inner filter screen 9. The filter assembly passes through the outer filter screen 8 and the inner filter screen 9. The filter element 9 and the filter body 10 work together to form a multi-stage filtration structure for graded filtration of the oil entering the filter. The outer filter screen 8 is used for primary filtration of the oil entering the housing 1, the inner filter screen 9 is used in conjunction with the filter paper structure for fine filtration of the oil, and the filter body 10 is used for secondary filtration of the oil after filtration by the outer filter screen 8. The filter body 10 is a detachable filter structure between the outer filter screen 8 and the inner filter screen 9, allowing for individual replacement of the filter body 10 or replacement of the entire filter assembly.

[0029] The system also includes a filter element holder 11 and a filter element cover 12. The filter element holder 11 is located on the side of the filter end plate 6 near the outer filter screen 8 and is fixedly connected to the filter end plate 6. The end of the filter element body 10 near the filter end plate 6 is snapped into the filter element holder 11. The filter element cover 12 is located on the side of the filter end cover 7 away from the filter element body 10 and is snapped into the filter end cover 7. The filter element holder 11 serves as a snap-fit ​​structure on the filter end plate 6, providing installation support for the filter element body 10 to be detachably installed between the outer filter screen 8 and the inner filter screen 9. The filter element cover 12 serves as a detachable cover structure on the filter end cover 7. When the filter element body 10 needs to be replaced separately, the filter element cover 12 is removed from the filter end cover 7 to replace the filter element body 10 separately. A schematic diagram of the cooperation between the filter element cover 12 and the filter end cover 7 is shown below. Figure 3As shown.

[0030] The bypass mechanism includes a mounting ring 13, a bypass spring 14, and a bypass valve block 15. The mounting ring 13 is located on the side of the support base plate 5 near the support spring 4 and is fixedly connected to the support base plate 5. The bypass spring 14 is located on the side of the mounting ring 13 away from the bypass spring 14, and one end of the bypass spring 14 is fixedly connected to the bypass spring 14. The support base plate 5 has a mounting through hole corresponding to the bypass spring 14, and the bypass spring 14 is located in the mounting through hole. The bypass valve block 15 is located on the end of the bypass spring 14 away from the mounting ring 13 and is fixedly connected to the bypass spring 14. The bypass valve block 15 is fitted into the mounting through hole. Several sets of bypass mechanisms are provided, and the several sets of bypass mechanisms are evenly spaced and arranged in a ring on the support base plate 5, with the bypass valve block 15 located inside the limiting seat. The bypass mechanism, through the cooperation of the mounting ring 13, the bypass spring 14, and the bypass valve block 15, serves as a bypass structure on the support base plate 5. When the filter paper is clogged, a bypass oil passage is formed, allowing the oil to be directly discharged from the filter through the oil outlet channel and oil outlet 17, ensuring normal operation of the equipment. The mounting ring 13 serves as a mounting structure on the support base plate 5 to mount the bypass spring 14 within the mounting through hole of the support base plate 5. The bypass spring 14 provides elastic support for the bypass valve block 15. The bypass valve block 15, under the action of the bypass spring 14, together with the mounting through hole, forms a bypass valve structure. When the filter paper structure is clogged, the oil in the housing 1 applies pressure to the bypass valve block 15, causing it to move towards the inside of the filter assembly, opening the mounting through hole to form a bypass oil passage. The oil in the housing 1 flows into the inside of the filter assembly through the bypass oil passage and is further discharged from the filter through the oil outlet channel and oil outlet 17. A cross-sectional view of the bypass mechanism and support base plate 5 of this utility model is shown below. Figure 4 As shown.

[0031] It also includes an oil inlet 16 and an oil outlet 17. The oil inlet 16 is located on the side of the filter cover 2 away from the outer shell 1 and is fixedly connected to the filter cover 2. The oil inlet 16 communicates with the interior of the filter cover 2. The oil outlet 17 is located in the middle of the side of the filter cover 2 away from the outer shell 1 and is fixedly connected to the filter cover 2. The oil outlet 17 communicates with the oil outlet channel on the support core rod 3. The oil inlet 16 is used as an oil inlet structure on the filter to meet the oil inlet requirements of the filter, and the oil outlet 17 is used as an oil outlet structure on the filter to meet the oil outlet requirements of the filter.

[0032] It also includes an exhaust valve 18, which is located on the side of the filter cover 2 away from the outer casing 1 and is fixedly connected to the filter cover 2. The exhaust valve 18 serves as an exhaust structure on the filter to meet the filter's exhaust requirements. A schematic diagram of the exhaust valve 18 and filter cover 2 in this invention is shown below. Figure 5 As shown.

[0033] Working principle:

[0034] During operation, the oil enters the filter through the inlet 16. The filter assembly in the filtration mechanism performs staged filtration of the oil. The filtered oil enters the outlet 17 through the oil outlet channel on the upper part of the support rod 3 and is discharged from the filter through the outlet 17, thus completing the filtration of the oil. When the filter paper structure is blocked, the oil in the housing 1 applies pressure to the bypass valve block 15 on the inner side of the support base plate 5, causing the bypass valve block 15 to move towards the inner side of the filter assembly, opening the mounting through hole to form a bypass oil passage. The oil in the housing 1 flows into the inner side of the filter assembly through the bypass oil passage and is further discharged from the filter through the oil outlet channel and the outlet 17, ensuring the normal operation of the equipment. When the filter element body 10 needs to be replaced individually, the filter element cover 12 is removed from the filter end cover 7 to replace the filter element body 10 individually. When the entire filter assembly needs to be replaced, the filter cover 2 is opened to remove the entire filter assembly from the support base plate 5 for replacement.

[0035] The advantages of this utility model are its simple structure, the presence of a support mechanism that allows the filtration mechanism to be installed inside the housing and provided with top support, thereby improving the working stability of the filtration mechanism and facilitating its disassembly and maintenance. The filtration mechanism employs a multi-filter element structure, enabling graded filtration of oil with good filtration effect. Furthermore, individual filter elements can be disassembled and replaced, providing high flexibility in use. The bypass mechanism allows for the formation of multiple bypass oil circuits when the filter paper is clogged, ensuring the normal operation of the equipment.

[0036] The above description details one embodiment of the present utility model, but it is merely a preferred embodiment and should not be construed as limiting the scope of the present utility model. All equivalent variations and improvements made within the scope of the present utility model application should still fall within the patent coverage of the present utility model.

Claims

1. An oil filter provided with a multi-filter element and multi-bypass valve, comprising a housing (1) and a filter cover (2) fitted to one end of the housing (1), characterized in that, The support mechanism is arranged inside the shell (1), the filtering mechanism is assembled on the side of the support mechanism, and the bypass mechanism is arranged between the support mechanism and the filtering mechanism.

2. An oil filter having a multi-cartridge, multi-bypass valve as set forth in claim 1 wherein, The support mechanism comprises a support core rod (3), a support spring (4), and a support base plate (5). The support core rod (3) is arranged inside the shell (1) and is fixedly connected to one end of the shell (1). The support spring (4) is arranged at the end of the support core rod (3) connected to the shell (1) and is sleeved with the support core rod (3). One end of the support spring (4) is in abutment with the shell (1). The support base plate (5) is arranged at the end of the support spring (4) away from the shell (1) and is fixedly connected with the support spring (4). The support base plate (5) is sleeved with the support core rod (3).

3. An oil filter having a multi-cartridge, multi-bypass valve as set forth in claim 2 wherein, One end of the support core rod (3) away from the support spring (4) is provided with an oil outlet channel. One end of the support base plate (5) away from the support spring (4) is provided with a limiting clamping seat corresponding to the filtering mechanism.

4. An oil filter having a multi-cartridge, multi-bypass valve as set forth in claim 3 wherein, The filtering mechanism comprises a filtering end plate (6), a filtering assembly, and a filtering end cover (7). The filtering end plate (6) is arranged at the end of the support base plate (5) away from the support spring (4) and is clamped with the support base plate (5) through the limiting clamping seat. The filtering assembly is assembled on the side of the filtering end plate (6) away from the support base plate (5). The filtering end cover (7) is arranged at the end of the filtering assembly away from the filtering end plate (6) and is sleeved with the support core rod (3).

5. An oil filter having a multi-cartridge, multi-bypass valve as set forth in claim 4 wherein, The filtering assembly comprises a filtering outer net (8), a filtering inner net (9), and a filter core body (10). The filtering outer net (8) is arranged on the side of the filtering end plate (6) away from the support base plate (5) and is fixedly connected with the filtering end plate (6). The filtering inner net (9) is arranged on the side of the filtering end plate (6) away from the support base plate (5) and is fixedly connected with the filtering end plate (6). The filtering inner net (9) is located inside the filtering outer net (8) and is coaxially arranged with the filtering outer net (8). The inner side of the filtering inner net (9) is provided with a filter paper structure. The filter core body (10) is assembled between the filtering outer net (8) and the filtering inner net (9).

6. An oil filter having a multi-cartridge, multi-bypass valve as set forth in claim 5 wherein, The filtering mechanism further comprises a filter core clamping seat (11) and a filter core buckle cover (12). The filter core clamping seat (11) is arranged on the side of the filtering end plate (6) close to the filtering outer net (8) and is fixedly connected with the filtering end plate (6). One end of the filter core body (10) close to the filtering end plate (6) is clamped and connected with the filter core clamping seat (11). The filter core buckle cover (12) is arranged on the side of the filtering end cover (7) away from the filter core body (10) and is buckled and connected with the filtering end cover (7).

7. An oil filter having a multi-cartridge, multi-bypass valve as set forth in claim 6 wherein, The bypass mechanism comprises a mounting ring (13), a bypass spring (14) and a bypass valve block (15), the mounting ring (13) is arranged on the side of the support base plate (5) close to the support spring (4) and is fixedly connected with the support base plate (5), the bypass spring (14) is arranged on the side of the mounting ring (13) away from the bypass spring (14) and one end thereof is fixedly connected with the bypass spring (14), the support base plate (5) is provided with a mounting through hole corresponding to the bypass spring (14), the bypass spring (14) is located in the mounting through hole, and the bypass valve block (15) is arranged on the end of the bypass spring (14) away from the mounting ring (13) and is fixedly connected with the bypass spring (14), and the bypass valve block (15) is embeddedly connected with the mounting through hole.

8. An oil filter having a multi-cartridge, multi-bypass valve as set forth in claim 7 wherein, The bypass mechanism is provided with a plurality of groups, and the plurality of groups of bypass mechanisms are uniformly and intervally arranged on the support base plate (5) and the bypass valve block (15) is located on the inner side of the limiting clamping seat.

9. An oil filter having a multi-cartridge, multi-bypass valve as set forth in claim 8 wherein, The bypass mechanism comprises a mounting ring (13), a bypass spring (14) and a bypass valve block (15), the mounting ring (13) is arranged on the side of the support base plate (5) close to the support spring (4) and is fixedly connected with the support base plate (5), the bypass spring (14) is arranged on the side of the mounting ring (13) away from the bypass spring (14) and one end thereof is fixedly connected with the bypass spring (14), the support base plate (5) is provided with a mounting through hole corresponding to the bypass spring (14), the bypass spring (14) is located in the mounting through hole, and the bypass valve block (15) is arranged on the end of the bypass spring (14) away from the mounting ring (13) and is fixedly connected with the bypass spring (14), and the bypass valve block (15) is embeddedly connected with the mounting through hole.

10. An oil filter having a multi-cartridge, multi-bypass valve as set forth in claim 9 wherein, The bypass mechanism comprises a mounting ring (13), a bypass spring (14) and a bypass valve block (15), the mounting ring (13) is arranged on the side of the support base plate (5) close to the support spring (4) and is fixedly connected with the support base plate (5), the bypass spring (14) is arranged on the side of the mounting ring (13) away from the bypass spring (14) and one end thereof is fixedly connected with the bypass spring (14), the support base plate (5) is provided with a mounting through hole corresponding to the bypass spring (14), the bypass spring (14) is located in the mounting through hole, and the bypass valve block (15) is arranged on the end of the bypass spring (14) away from the mounting ring (13) and is fixedly connected with the bypass spring (14), and the bypass valve block (15) is embeddedly connected with the mounting through hole.

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