A centrifugal oil filter

Abstract

This utility model discloses a centrifugal oil filter, including a housing and a central shaft. A filter assembly is installed inside the housing, and the central shaft is rotatably connected to the filter assembly. The central shaft has an elongated groove, an oil inlet pipe, and a backflow suppression valve. The central shaft also has a clearance hole. The oil inlet pipe is connected to an oil delivery pipe that passes through the clearance hole. A nozzle is installed at one end of the oil delivery pipe that passes through the clearance hole. The filter assembly includes an outer filter cylinder and an inner filter cylinder. Filter paper is installed between the outer and inner filter cylinders. An oil reservoir is installed between the filter assembly and the housing, and an oil outlet is installed on the oil reservoir. Oil is sprayed through the oil delivery pipe to the inner filter cylinder, and the spray impact force drives the inner filter cylinder to rotate. The centrifugal force generated by the rotation effectively separates impurities in the oil. Combined with the filter paper between the inner and outer filter cylinders, multi-level fine filtration is achieved, significantly improving the filtration effect.

Description

Technical Field

[0001] This utility model belongs to the technical field of oil filter, specifically a centrifugal oil filter. Background Technology

[0002] An oil filter is a device specifically designed to filter suspended particles, metal shavings, carbon deposits, dust, and other contaminants from engine oil. It typically consists of a filter element, a filter housing, and seals.

[0003] Existing oil filters, such as the one disclosed in patent document "CN113803195B", involve oil entering the housing 1 through the oil inlet pipe 2, then reaching the filter cartridge 6 through the oil inlet channel. After being filtered by the filter cartridge 6, the oil reaches the center of the filter cartridge 6 and is discharged through the oil outlet pipe 3. After filtration, large particles of impurities are blocked on the surface of the filter cartridge 6. However, filtering the oil with only a single-layer filtration device is difficult to guarantee the filtration effect and is prone to clogging the filter cartridge. Utility Model Content

[0004] The purpose of this invention is to provide a centrifugal oil filter to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A centrifugal oil filter includes a housing and a central shaft. A filter assembly is disposed inside the housing. The central shaft passes through the filter assembly and is rotatably connected to the filter assembly. An elongated groove is formed inside the central shaft, along with an oil inlet pipe and a backflow suppression valve located within the groove. A clearance hole is formed on the central shaft. An oil delivery pipe is connected to the oil inlet pipe and passes through the clearance hole. A nozzle is provided at one end of the oil delivery pipe passing through the clearance hole. The oil delivery pipe is located inside the filter assembly. The filter assembly includes an outer filter cylinder and an inner filter cylinder, which are detachably connected. Filter paper is disposed between the outer filter cylinder and the inner filter cylinder. An oil reservoir is disposed between the filter assembly and the housing, and an oil outlet hole is formed on the oil reservoir.

[0007] A further technical solution is provided, wherein the outer filter cylinder includes a bottom plate and a round cover, and an outer cylinder is provided between the bottom plate and the round cover. The bottom plate has a through hole one, and the round cover has a through hole two. The central shaft passes through the through hole one and the through hole two, and the central shaft is rotatably connected to the hole walls of the through hole one and the through hole two. The outer cylinder is fixedly connected to the bottom plate.

[0008] In a further technical solution, the bottom plate portion is provided with a plurality of filter paper grooves one around the through hole one, and the round cover portion is provided with a plurality of filter paper grooves two around the through hole two. The filter paper grooves one and two are used to clamp the filter paper.

[0009] A further technical solution includes a bottom plate with a first annular protrusion and a second annular protrusion, and an annular groove 1 for inserting the inner filter cylinder between the first annular protrusion and the second annular protrusion. The cover portion is provided with a third annular protrusion and a fourth annular protrusion, and an annular groove 2 for inserting the inner filter cylinder between the third annular protrusion and the fourth annular protrusion. One end of the inner filter cylinder is inserted into the first annular groove, and the other end of the inner filter cylinder is inserted into the second annular groove. The groove wall of the second annular groove is bonded to the inner filter cylinder.

[0010] A further technical solution involves two cleaning tubes respectively mounted on the central shaft, with an angle of 90° between the cleaning tubes and the oil delivery pipe. A cleaning brush is mounted on the end of each cleaning tube furthest from the central shaft. The height of the cleaning brush is equal to the height at which the oil sprayed from the nozzle first reaches the inner filter cylinder, and the friction between the cleaning brush and the inner filter cylinder is less than the impact force of the oil on the inner filter cylinder.

[0011] The beneficial effects of this utility model are:

[0012] In this invention, the oil first enters the oil filter through the oil inlet pipe inside the central shaft. When it flows through the backflow suppression valve installed in the oil inlet pipe, the valve prevents the oil from flowing back, ensuring unidirectional flow. Then, the oil enters the oil delivery pipe passing through the clearance hole of the central shaft. The nozzle at the end of the oil delivery pipe sprays the oil into the inner filter cylinder at a certain pressure. The impact force of the oil on the inner filter cylinder causes the inner filter cylinder to rotate, which in turn generates centrifugal force, causing the oil to separate from impurities. The oil first passes through the filter screen of the inner filter cylinder, and then through the filter paper layer sandwiched between the inner and outer filter cylinders for fine filtration. Finally, it passes through the filter holes of the outer filter cylinder to remove residual impurities. The purified oil flows into the oil reservoir located between the filter assembly and the outer shell. The oil in the oil reservoir flows out through the oil outlet and enters the engine lubrication system, achieving effective filtration and circulation of the engine oil.

[0013] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0014] Figure 1 Overall schematic diagram of this utility model Figure 1 .

[0015] Figure 2 Overall schematic diagram of this utility model Figure 2 .

[0016] Figure 3 : Structural diagram of the filter assembly of this utility model.

[0017] Figure 4 : Front view of the filter component of this utility model.

[0018] Figure 5 : Cross-sectional view of the filter component of this utility model.

[0019] Figure 6 Explosion of the filter assembly of this utility model Figure 1 .

[0020] Figure 7 Explosion of the filter assembly of this utility model Figure 2 .

[0021] Figure 8 : Structural diagram of the circular cover portion of the outer filter cylinder of this utility model.

[0022] Figure 9 : Structural diagram of the bottom plate and outer cylinder of the outer filter cylinder of this utility model

[0023] Reference numerals: 1. Outer shell; 2. Central shaft; 3. Long groove; 4. Oil inlet pipe; 5. Backflow suppression valve; 6. Oil delivery pipe; 7. Nozzle; 8. Outer filter cylinder; 9. Inner filter cylinder; 10. Filter paper; 11. Oil reservoir; 12. Oil outlet; 13. Bottom plate; 131. Circular protrusion one; 132. Circular protrusion two; 133. Circular groove one; 14. Round cover; 141. Circular protrusion three; 142. Circular protrusion four; 143. Circular groove two; 15. Outer cylinder; 16. Through hole one; 17. Through hole two; 18. Filter paper groove one; 19. Filter paper groove two; 20. Cleaning tube; 21. Cleaning brush; Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0025] Please refer to Figure 1-9 ;

[0026] This embodiment discloses a centrifugal oil filter, including a housing 1 and a central shaft 2. A filter assembly is disposed inside the housing 1, and the central shaft 2 passes through the filter assembly and is rotatably connected to the filter assembly. An elongated groove 3 is formed inside the central shaft 2, along with an oil inlet pipe 4 and a backflow suppression valve 5 located within the groove 3. The oil inlet pipe 4 can be a flexible pipe or a rigid pipe, or a combination of both. The backflow suppression valve 5 is installed in the oil inlet pipe 4 to suppress oil backflow. The central shaft 2 has a clearance hole. There are two holes. The oil inlet pipe 4 is equipped with a connected oil delivery pipe 6. The two oil delivery pipes 6 pass through two clearance holes respectively. A nozzle 7 is provided at one end of the oil delivery pipe 6 that passes through the clearance hole. The oil delivery pipe 6 is located inside the filter assembly. The nozzle 7 can spray oil into the filter assembly. The filter assembly includes an outer filter cylinder 8 and an inner filter cylinder 9. The outer filter cylinder 8 and the inner filter cylinder 9 are detachably connected. Filter paper 10 is provided between the outer filter cylinder 8 and the inner filter cylinder 9. An oil storage body 11 is provided between the filter assembly and the outer shell 1. An oil outlet hole 12 is opened on the oil storage body 11.

[0027] More specifically, the oil first enters the oil filter through the oil inlet pipe 4 installed inside the central shaft 2. When flowing through the backflow suppression valve 5 installed in the oil inlet pipe 4, the valve prevents the oil from flowing back, ensuring unidirectional flow. Subsequently, the oil enters the oil delivery pipe 6 passing through the clearance hole of the central shaft 2. The nozzle 7 at the end of the oil delivery pipe 6 sprays the oil into the inner filter cylinder 9 at a certain pressure. The impact force of the oil on the inner filter cylinder 9 causes the inner filter cylinder 9 to rotate, which in turn generates centrifugal force, causing the oil to separate from impurities. The oil first passes through the filter screen of the inner filter cylinder 9, and then through the filter paper 10 layers sandwiched between the inner and outer filter cylinders 8 for fine filtration. Finally, it passes through the filter holes of the outer filter cylinder 8 to remove residual impurities. The purified oil flows into the oil reservoir 11 located between the filter assembly and the outer casing 1. The oil in the oil body 11 flows out through the oil outlet 12 and enters the engine lubrication system, achieving effective filtration and circulation of the engine oil. By setting an oil inlet pipe 4 in the central shaft 2 and equipping it with a backflow suppression valve 5, the oil is ensured to flow steadily in one direction. The oil is sprayed through the oil delivery pipe 6 to the inner filter cartridge 9 and rotated by the impact force of the spray. The centrifugal force generated by the rotation effectively separates impurities in the oil. Combined with the filter paper 10 between the inner filter cartridge 9 and the outer filter cartridge 8, multi-layer fine filtration is achieved, which significantly improves the filtration effect and avoids the problem of easy clogging of single-layer filter cartridges. The filtered clean oil flows into the oil reservoir 11 and is stably output through the oil outlet 12, thereby achieving efficient purification and continuous circulation of the engine oil, improving the service life of the oil filter and the reliability of the engine lubrication system.

[0028] In this embodiment, the outer filter cylinder 8 includes a bottom plate portion 13 and a round cover portion 14. An outer cylinder portion 15 is disposed between the bottom plate portion 13 and the round cover portion 14. The bottom plate portion 13 has a first through hole 16, and the round cover portion 14 has a second through hole 17. The diameters of the first through hole 16 and the second through hole 17 are equal. The central shaft 2 passes through the first through hole 16 and the second through hole 17, and the central shaft 2 is rotatably connected to the walls of the first through hole 16 and the second through hole 17. In this embodiment, The central shaft 2 is connected to the through holes 16 and 17 by sealed bearings; the outer cylinder 15 is fixedly connected to the bottom plate 13. Furthermore, the bottom plate 13 has several filter paper 10 grooves 11 around the through holes 16, and the round cover 14 has several filter paper 10 grooves 2 around the through holes 17. The filter paper 10 grooves 11 and 2 are used to hold the filter paper 10. In this embodiment, the outer filter cylinder 8 consists of the bottom plate 13, the outer cylinder 15, and the round cover 14. The filter consists of a base plate 13 and a round cover 14, which are fixedly connected by an outer cylinder 15. The base plate 13 and the round cover 14 are respectively provided with through holes 16 and 17 of equal diameter. The central shaft 2 passes through these two through holes and is rotatably connected to the hole walls via a sealed bearing, allowing the outer filter cylinder 8 to rotate stably and smoothly around the central shaft 2. Furthermore, the base plate 13 and the round cover 14 are respectively provided with several filter paper grooves 11 and 12 around the through holes 16 and 17, for clamping the filter paper 10, achieving stable fixation and sealing of the filter paper 10 within the outer filter cylinder 8, preventing displacement or detachment, and ensuring the sealing and filtration effect of the filter paper 10. Simultaneously, the application of the sealed bearing reduces friction and leakage during rotation, improving the durability and sealing performance of the filter, thereby achieving more efficient multi-layer filtration and enhancing the overall filtration accuracy and service life of the oil filter.

[0029] In this embodiment, the bottom plate 13 is provided with a first annular protrusion 131 and a second annular protrusion 132. An annular groove 133 for inserting the inner filter cylinder 9 is provided between the first annular protrusion 131 and the second annular protrusion 132. The round cover 14 is provided with a third annular protrusion 141 and a fourth annular protrusion 142. An annular groove 243 for inserting the inner filter cylinder 9 is provided between the third annular protrusion 141 and the fourth annular protrusion 142. One end of the inner filter cylinder 9 is inserted into the first annular groove 133, and the other end of the inner filter cylinder 9 is inserted into the second annular groove 143. The groove wall of the second annular groove 143 is bonded to the inner filter cylinder 9. In this embodiment, the groove wall of the second annular groove 143 is fixed to the inner filter cylinder 9 by bonding. The connection ensures that the inner filter cartridge 9 is securely embedded between the bottom plate 13 and the round cover 14 of the outer filter cartridge 8, achieving reliable assembly of the inner filter cartridge 9 and the outer filter cartridge 8. Through the cooperation of the annular groove 133, annular groove 2143 and annular protrusions 131, 132, 141 and 142, the inner filter cartridge 9 and the outer filter cartridge 8 are precisely positioned and securely connected. The bonding between annular groove 2143 and one end of the inner filter cartridge 9 further enhances the connection strength, preventing the inner filter cartridge 9 from loosening or falling off during use, ensuring the overall stability and sealing of the filter assembly, and effectively improving the durability and filtration performance of the filter.

[0030] In this embodiment, two cleaning tubes 20 are respectively arranged on the central shaft 2. The angle between the cleaning tubes 20 and the oil supply pipe 6 is 90°. A cleaning brush 21 is arranged at the end of the cleaning tube 20 away from the central shaft 2. The height of the cleaning brush 21 is equal to the height at which the oil sprayed from the nozzle first reaches the inner filter cylinder 9. The friction between the cleaning brush 21 and the inner filter cylinder 9 is less than the impact force of the oil on the inner filter cylinder 9. In this embodiment, two cleaning tubes are installed on the central shaft 2 at a 90° angle to the oil supply pipe 6. Kun 20, the end of cleaning Kun 20 away from the central axis 2 is equipped with a cleaning brush 21; when the oil is sprayed into the inner filter cylinder 9 through the nozzle, the inner filter cylinder 9 rotates so that the inner wall of the inner filter cylinder 9 is gently cleaned by the cleaning brush 21. The height of the brush bristles matches the height of the oil when it is first sprayed into the inner filter cylinder 9, and the friction between the cleaning brush 21 and the inner filter cylinder 9 is less than the impact force of the oil on the inner filter cylinder 9, ensuring that the friction between the cleaning brush 21 and the inner filter cylinder 9 will not hinder the rotation of the inner filter cylinder 9.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A centrifugal type engine oil filter characterized by comprising: The device includes a housing (1) and a central shaft (2). A filter assembly is installed inside the housing (1). The central shaft (2) passes through the filter assembly and is rotatably connected to it. A long groove (3) is provided inside the central shaft (2), along with an oil inlet pipe (4) and a backflow suppression valve (5) located within the groove (3). A clearance hole is provided on the central shaft (2). An oil delivery pipe (6) is connected to the oil inlet pipe (4), passing through the clearance hole. A nozzle (7) is provided at one end of the oil pipe (6) that passes through the clearance hole. The oil pipe (6) is located inside the filter assembly. The filter assembly includes an outer filter cylinder (8) and an inner filter cylinder (9). The outer filter cylinder (8) and the inner filter cylinder (9) are detachably connected. Filter paper (10) is provided between the outer filter cylinder (8) and the inner filter cylinder (9). An oil storage body (11) is provided between the filter assembly and the outer shell (1). An oil outlet hole (12) is opened on the oil storage body (11).

2. A centrifugal oil filter according to claim 1, characterized in that, The outer filter cylinder (8) includes a bottom plate (13) and a round cover (14). An outer cylinder (15) is provided between the bottom plate (13) and the round cover (14). The bottom plate (13) has a through hole one (16), and the round cover (14) has a through hole two (17). The central shaft (2) passes through the through hole one (16) and the through hole two (17), and the central shaft (2) is rotatably connected to the hole walls of the through hole one (16) and the through hole two (17). The outer cylinder (15) is fixedly connected to the bottom plate (13).

3. A centrifugal oil filter according to claim 2, characterized in that, The bottom plate (13) has a plurality of filter paper (10) grooves around the through hole (16), and the round cover (14) has a plurality of filter paper (10) grooves around the through hole (17). The filter paper (10) grooves and the filter paper (10) grooves are used to hold the filter paper (10).

4. A centrifugal oil filter according to claim 3, characterized in that, The bottom plate (13) is provided with a first annular protrusion (131) and a second annular protrusion (132). An annular groove (133) for inserting the inner filter cylinder (9) is provided between the first annular protrusion (131) and the second annular protrusion (132). The round cover (14) is provided with a third annular protrusion (141) and a fourth annular protrusion (142). An annular groove (143) for inserting the inner filter cylinder (9) is provided between the third annular protrusion (141) and the fourth annular protrusion (142). One end of the inner filter cylinder (9) is inserted into the first annular groove (133), and the other end of the inner filter cylinder (9) is inserted into the second annular groove (143). The groove wall of the second annular groove (143) is bonded to the inner filter cylinder (9).

5. A centrifugal oil filter according to claim 1, characterized in that, Two cleaning tubes (20) are respectively provided on the central shaft (2). The angle between the cleaning tube (20) and the oil pipe (6) is 90°. A cleaning brush (21) is provided at the end of the cleaning tube (20) away from the central shaft (2).

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