CN110792486B

CN110792486B - Filter

Info

Publication number: CN110792486B
Application number: CN201911074681.5A
Authority: CN
Inventors: 杨卫民
Original assignee: Gansu Xijiang Intelligent Equipment Technology Co ltd
Current assignee: Linhai Jiangnan Internal Combustion Engine Accessories Factory
Priority date: 2019-11-06
Filing date: 2019-11-06
Publication date: 2021-07-06
Anticipated expiration: 2039-11-06
Also published as: CN110792486A

Abstract

The invention belongs to the technical field of engine oil filtration, and particularly relates to a filter, which comprises a central cylinder, filter paper A, a sealing ring C, a separating cylinder, a sealing ring B, a sealing ring A, a spring B and a sealing column, wherein the invention is characterized in that through the innovative design of a main channel and a bypass channel, the sealing column, the sealing ring A, the sealing ring B and the sealing ring C are in transmission connection, so that when the filter normally filters engine oil, the sealing ring A does not block the main channel, and the sealing ring B and the sealing ring C block the bypass channel; when the unable normal filtration machine oil of filter, A sealing ring blocks up the main entrance, and B sealing ring closes the ring and no longer blocks up the by-pass with C sealing ring, and machine oil can not flow through from the main entrance, and the impurity of filtering accumulation on the A filter paper of main entrance department so can not carried by the machine oil that flows through from the by-pass, and filter accumulation's impurity will not enter into the engine along with machine oil before on the A filter paper so, provides good protection for the engine.

Description

Filter

Technical Field

The invention belongs to the technical field of engine oil filtration, and particularly relates to a filter.

Background

At present, in the working process of an automobile engine, metal abrasive dust, carbon deposit oxidized at high temperature, cementing sediment and the like can be continuously mixed into engine oil, so that an oil filter is required to be installed to filter mechanical impurities and colloid, the cleanness of the engine oil is kept, and the service life of the engine is prolonged. The filter paper in the filter plays a key filtering role, but the filter is not replaced in time after being used for a long time, so that excessive filtered impurities are accumulated on the filter paper, and the filter paper is easily blocked by the impurities; in order to ensure the smooth circulation of the engine oil, the bypass valve is opened by the engine oil under the pressure of the oil pump, the inflowing engine oil cannot be filtered by the filter paper, and impurities accumulated on the filter paper are mixed into the engine oil again and then flush into the engine, so that the engine is inevitably abraded. In addition, when the automobile is started in winter, the engine oil is low in temperature and high in viscosity, most of the engine oil which is low in temperature and high in viscosity cannot pass through the filter paper, and then impurities accumulated on the filter paper are mixed into the engine oil again and then flush into the engine when the bypass valve is opened, so that the engine is inevitably abraded.

The invention designs a filter to solve the problems.

Disclosure of Invention

In order to solve the defects in the prior art, the invention discloses a filter which is realized by adopting the following technical scheme.

In the description of the present invention, it should be noted that the terms "inside", "below", "upper" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention usually place when using, and are only used for convenience of description and simplification of description, but do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation or be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

The utility model provides a filter, it includes external seal circle, bottom plate, thread cover plate, cartridge case, check valve, its characterized in that: the device also comprises a central cylinder, filter paper A, a sealing ring C, a separating cylinder, a sealing ring B, a sealing ring A, a supporting ring B, a supporting ring A, a spring A, a fixing sleeve A, a positioning sleeve, a spring B, a sealing column and a fixing sleeve B, wherein a bottom plate is arranged at one end of the cylinder shell, an outer sealing ring is arranged on the bottom plate, and a threaded cover plate with a plurality of holes B uniformly distributed in the circumferential direction is arranged in the cylinder shell and connected with the bottom plate; a separating cylinder is arranged in the cylinder shell, and a central cylinder is arranged in the separating cylinder; a channel ring is arranged on the inner wall of the cylinder shell, and a bypass channel is formed between the channel ring and the separating cylinder; a plurality of holes A are uniformly distributed on the central cylinder, convex rings are arranged at two ends of the central cylinder, and A filter paper is arranged between the two convex rings; the center of the bottom of the inner cylinder of the cylinder shell is fixedly provided with an A fixed sleeve; the two sides of the bottom of the central cylinder, which are close to the fixed sleeve A, are respectively and fixedly provided with a fixed sleeve B and a positioning sleeve, the fixed sleeve B is positioned in the central cylinder, and the positioning sleeve is positioned on the outer side of the central cylinder; one part of the positioning sleeve is sleeved on the A fixing sleeve; one end of a spring A positioned in the positioning sleeve is contacted with the end surface of the fixing sleeve A, and the other end of the spring A is contacted with the side surface of the central cylinder; the sealing column slides in the B fixing sleeve in a sealing way, and a B spring for resetting the sealing column is arranged on the sealing column.

A main channel is formed between the central cylinder and the separating cylinder; one end of a connecting column in the fixed sleeve A is fixedly connected with the side surface of the sealing column, and three support rods are uniformly distributed at the other end of the connecting column in the circumferential direction; one ends of the three support rods, which are far away from the connecting column, are fixedly provided with a support ring A; the three supporting rods slide on the fixing sleeve A; the sealing ring A matched with the main channel is fixedly arranged on the side surface of the support ring A; the sealing ring C matched with one port of the bypass channel close to the threaded cover plate is in synchronous transmission connection with the sealing ring A; the B support ring and the A support ring which are slidably arranged at the bottom of the cylinder shell are in transmission connection, and the axial movement directions of the B support ring and the A support ring are always opposite and the speeds of the B support ring and the A support ring are the same; and a B sealing ring matched with one port of the bypass channel far away from the threaded cover plate is fixedly arranged on the side surface of the B supporting ring.

A check valve having a flared ring is mounted between the threaded cover plate and the corresponding side of the central cartridge; the horn-shaped ring is matched with the hole B on the threaded cover plate.

As a further improvement of the technology, the outer cylinder surface of the partition cylinder is arranged on the inner wall of the channel ring of the cylinder shell through a plurality of A connecting blocks which are uniformly distributed in the circumferential direction at the two ends; each convex ring on the central cylinder is arranged on the inner cylinder surface of the separating cylinder through a plurality of B connecting blocks which are uniformly distributed in the circumferential direction.

As a further improvement of the present technology, the springs a and B are always in a compressed state. The compression state of the A spring is used for better clamping the cartridge shell and the bottom plate. The spring B is in a compressed state so that the sealing column can slide after the engine oil in the cylinder shell reaches a certain pressure.

As a further improvement of the technology, one end of each of three branch bars which are uniformly distributed in the circumferential direction is fixedly connected with the end face of the fixing sleeve B far away from the positioning sleeve, and the other end of each branch bar is fixedly provided with a fixing ring; one end of a spring B positioned in the three branch bars is fixedly connected with the fixing ring, and the other end of the spring B is fixedly connected with the end face, far away from the positioning sleeve, of the fixing sleeve B.

As a further improvement of the technology, a retaining ring is arranged at one end, close to the positioning sleeve, of the fixing sleeve B, an inner sealing ring is arranged on the retaining ring, and the inner sealing ring is matched with the sealing column. In the initial state, the inner sealing ring is attached to the sealing column, and engine oil in the cylinder shells cannot leak out from the space between the sealing column and the B fixing sleeve.

As a further improvement of the technology, the fixing sleeve A is uniformly provided with three sliding grooves in the circumferential direction, and the three support rods slide in the three sliding grooves respectively; the fixing sleeve A is positioned in the supporting ring A.

As a further improvement of the technology, three guide rails are uniformly arranged on the surface of the inner cylinder in the middle of the partition cylinder in the circumferential direction; three L-shaped rods are respectively installed in the three guide rails in a sliding manner; one end of each L-shaped rod is fixedly connected with the side face, far away from the support ring A, of the sealing ring A, and the other end of each L-shaped rod is fixedly connected with the inner ring face of the sealing ring C; three L-shaped rods are all located in the main channel.

As a further improvement of the technology, three mounting grooves are uniformly formed in the inner annular surface of the B support ring in the circumferential direction, and a rack B is fixedly mounted in each mounting groove; three gears are uniformly arranged at the bottom of the inner cylinder of the cylinder shell in the circumferential direction; three racks A are uniformly arranged on the outer ring surface of the support ring A in the circumferential direction; the three gears are respectively meshed with the three racks B and the three racks A.

As a further improvement of the technology, three arc barrier strips are uniformly distributed in the circumferential direction of the middle part of the channel ring on the cylinder shell; the filter paper B is arranged in the bypass channel and matched with the three arc barrier strips; the filter pores of the filter paper A are smaller than those of the filter paper B. The arc baffle strip is used for blocking the B filter paper in the bypass channel and preventing engine oil circulating in the bypass channel from washing away the B filter paper.

As a further improvement of the technology, the end face, away from the A support ring, of the A sealing ring is provided with an inclined face, and the end face, with the inclined face, of the A sealing ring is matched with the main channel opening, where the partition cylinder and the corresponding convex ring are located, so that the A sealing ring can be inserted into the main channel opening, where the partition cylinder and the corresponding convex ring are located, better. The end surface of the sealing ring B far away from the supporting ring B is a sharp-angled inclined surface; one end surface of the C sealing ring corresponding to the bypass channel is a sharp-angled inclined surface, and the other end of the C sealing ring is a streamline transition surface; the two ports of the bypass channel are provided with inclined planes. The design is convenient for the B sealing ring and the C sealing ring to be respectively inserted into the bypass opening and well sealed. The streamline transition surface of the C sealing ring is used for facilitating the oil to flow through from two sides of the C sealing ring with small resistance.

The outer sealing ring, the inner sealing ring, the sealing column, the sealing ring A, the sealing ring B and the sealing ring C can be made of materials with certain elasticity. For example, a suitably resilient rubber material is selected.

Compared with the traditional filter, the invention has the beneficial effects that: according to the invention, through the innovative design of the main channel and the bypass channel, the sealing column, the sealing ring A, the sealing ring B and the sealing ring C are in transmission connection, so that when the filter filters engine oil normally, the sealing ring A does not block the main channel, and the sealing ring B and the sealing ring C block the bypass channel; the sealing ring B plays a role in preventing filtered impurities from diffusing into the bypass channel and being retained in the disc channel during normal filtration, and the using effect of the bypass channel is influenced. When the filter can not normally filter the engine oil, the main channel is blocked by the A sealing ring, the bypass channel is no longer blocked by the B sealing ring and the C sealing ring, the engine oil can not flow through the main channel, impurities which are filtered and accumulated on the A filter paper at the main channel before can not be carried by the engine oil flowing through the bypass channel basically, the impurities which are filtered and accumulated on the A filter paper before can not enter the engine along with the engine oil, good protection is provided for the engine, and the service life of the engine is prolonged. Under the condition of meeting the same beneficial effects of the invention, the invention has simple structure and better practical effect.

Drawings

Fig. 1 is an overall view and a schematic sectional view.

Fig. 2 is an overall sectional front view schematically.

Fig. 3 is an enlarged (first) view of a portion of fig. 2.

Fig. 4 is a partially enlarged (second) schematic view of fig. 2.

Fig. 5 is an overall center side elevation schematic view.

Fig. 6 is a schematic view of the check valve structure.

Fig. 7 is a schematic sectional view of the installation of the outer sealing ring and the threaded cap plate.

Fig. 8 is a schematic sectional view of the structure provided on the cartridge case.

Fig. 9 is a schematic cross-sectional view of a septum in a cartridge housing.

FIG. 10 is a schematic representation of A filter paper and B filter paper.

Fig. 11 is a schematic sectional view of the inner mounting structure of the center barrel.

Fig. 12 is a partially enlarged schematic view of fig. 11.

FIG. 13 is a cross-sectional partial detail schematic view of the gears, A seal ring, B seal ring, strut and seal post.

Fig. 14 is a schematic view of the mounting of the retainer ring.

FIG. 15 is a schematic sectional view of the installation of the A support ring and attachment post.

Fig. 16 is a sectional view showing the installation of the B rack.

FIG. 17 is a schematic sectional view showing the connection of the C-seal ring and the A-seal ring.

FIG. 18 is a schematic cross-sectional view of a main channel and a bypass channel.

FIG. 19 is a schematic diagram of the workflow process of the present invention.

Number designation in the figures: 1. an outer sealing ring; 2. a base plate; 3. a threaded cover plate; 4. a cartridge housing; 5. a check valve; 6. a horn ring; 7. a central barrel; 8. a, filter paper; 9. b, filter paper; 10. an arc barrier strip; 12. c, sealing rings; 13. a separating cylinder; 14. b, sealing a ring; 15. a, sealing a ring; 16. connecting columns; 17. a, connecting a block; 18. an L-shaped rod; 19. a guide rail; 20. a main channel; 21. a bypass channel; 22. b, supporting the ring; 23. b, a rack; 24. a gear; 25. a, a rack; 26. a, supporting a ring; 27. a strut; 28. a, a spring; 29. a, fixing a sleeve; 30. a positioning sleeve; 31. a spring B; 32. a fixing ring; 33. sealing the column; 34. a convex ring; 35. b, connecting a block; 36. a chute; 37. a channel ring; 38. a hole A; 39. b, fixing a sleeve; 40. an inner seal ring; 41. branch; 42. a retainer ring; 43. mounting grooves; 45. and (B) holes.

Detailed Description

The invention will be described with reference to the accompanying drawings, which are only schematic in terms of their structural proportions and which may be specified according to actual requirements; it should be understood that the description is illustrative only and is not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. It is noted that the terms used herein should be interpreted as having a meaning that is consistent with the context of this specification and should not be interpreted in an idealized or overly formal sense.

The utility model provides a filter, it includes external seal circle 1, bottom plate 2, thread cover plate 3, cartridge case 4, check valve 5, its characterized in that: the novel oil filter further comprises a central cylinder 7, a piece of filter paper A8, a C sealing ring 12, a separating cylinder 13, a B sealing ring 14, an A sealing ring 15, a B supporting ring 22, an A supporting ring 26, an A spring 28, an A fixing sleeve 29, a positioning sleeve 30, a B spring 31, a sealing column 33 and a B fixing sleeve 39, as shown in figures 1 and 7, wherein a bottom plate 2 is installed at one end of a cylinder shell 4, an outer sealing ring 1 is installed on the bottom plate 2, and a threaded cover plate 3 with a plurality of B holes 45 uniformly distributed in the circumferential direction is installed in the cylinder shell 4 and connected with the bottom plate 2; as shown in fig. 2, 5 and 9, a partition cylinder 13 is arranged in the cylinder shell 4, and a central cylinder 7 is arranged in the partition cylinder 13; as shown in fig. 8 and 9, the inner wall of the cylinder shell 4 is provided with a channel ring 37, and a bypass channel 21 is formed between the channel ring 37 and the partition cylinder 13; as shown in fig. 11, a plurality of holes a 38 are uniformly distributed on the central cylinder 7, the two ends of the central cylinder 7 are provided with convex rings 34, as shown in fig. 2, 10 and 11, a filter paper 8 is arranged between the two convex rings 34; as shown in fig. 12 and 13, an a fixing sleeve 29 is fixedly arranged at the center of the bottom of the inner cylinder of the cylinder shell 4; the two sides of the bottom of the central cylinder 7, which are close to the A fixing sleeve 29, are respectively and fixedly provided with a B fixing sleeve 39 and a positioning sleeve 30, the B fixing sleeve 39 is positioned in the central cylinder 7, and the positioning sleeve 30 is positioned on the outer side of the central cylinder 7; a part of the positioning sleeve 30 is sleeved on the A fixing sleeve 29; one end of an A spring 28 positioned in the positioning sleeve 30 is contacted with the end surface of an A fixed sleeve 29, and the other end is contacted with the side surface of the central cylinder 7; the sealing column 33 is hermetically slid on the B fixing sleeve 39, and the B spring 31 for resetting the sealing column 33 is arranged on the sealing column 33.

As shown in fig. 2 and 18, a main passage 20 is formed between the central cylinder 7 and the partition cylinder 13; as shown in fig. 13 and 15, one end of the connecting column 16 in the fixing sleeve 29 a is fixedly connected with the side surface of the sealing column 33, and three supporting rods 27 are uniformly distributed on the other end in the circumferential direction; the end of the three struts 27 far away from the connecting column 16 is fixedly provided with an A support ring 26; the three supporting rods 27 slide on the A fixing sleeve 29; the A sealing ring 15 matched with the main channel 20 is fixedly arranged on the side surface of the A supporting ring 26; as shown in fig. 2, 3 and 4, the C sealing ring 12 matched with one port of the bypass channel 21 close to the threaded cover plate 3 is in synchronous transmission connection with the a sealing ring 15; the B supporting ring 22 which is slidably arranged at the cylinder bottom of the cylinder shell 4 is in transmission connection with the A supporting ring 26, and the axial movement directions of the B supporting ring 22 and the A supporting ring 26 are always opposite and the speeds are the same; the B-ring seal 14, which is fitted to an end opening of the bypass channel 21 remote from the threaded cover plate 3, is fixedly mounted on the side of the B-ring 22.

As shown in fig. 1, 2, 6, a check valve 5 having a trumpet ring 6 is installed between the threaded cover plate 3 and the corresponding side of the central cylinder 7; the flared ring 6 mates with the B hole 45 on the threaded cover plate 3.

As shown in fig. 5 and 8, the outer surface of the partition cylinder 13 near both ends is mounted on the inner wall of the channel ring 37 of the cylinder shell 4 through a plurality of a connection blocks 17 uniformly distributed in the circumferential direction; as shown in fig. 9 and 11, each of the convex rings 34 on the central cylinder 7 is mounted on the inner cylindrical surface of the partition cylinder 13 through a plurality of B connection blocks 35 uniformly distributed in the circumferential direction.

The a spring 28 and the B spring 31 are always in a compressed state. The a-spring 28 is in compression to better grip the cartridge housing 4 and the base plate 2. The B spring 31 is compressed to allow the oil in the cylinder case 4 to reach a certain pressure and then to slide the seal post 33.

As shown in fig. 12 and 14, one end of each of three circumferentially and uniformly distributed branch bars 41 is fixedly connected to the end surface of the B-fixing sleeve 39 away from the positioning sleeve 30, and the other end is fixedly provided with a fixing ring 32; one end of the B spring 31 located in the three branch bars 41 is fixedly connected with the fixing ring 32, and the other end is fixedly connected with the end face of the B fixing sleeve 39 far away from the positioning sleeve 30.

As shown in fig. 12 and 14, the fixing sleeve 39B has a retainer ring 42 at one end thereof near the positioning sleeve 30, the inner seal ring 40 is mounted on the retainer ring 42, and the inner seal ring 40 is engaged with the sealing post 33. In the initial state, the inner seal ring 40 is in contact with the seal post 33, and the engine oil in the cartridge case 4 does not leak out between the seal post 33 and the B fixing sleeve 39.

As shown in fig. 8 and 12, three sliding grooves 36 are uniformly formed in the circumferential direction of the fixing sleeve a 29, and the three supporting rods 27 slide in the three sliding grooves 36 respectively; the above-mentioned a-fixture sleeve 29 is located in the a-support ring 26.

As shown in fig. 9, 13 and 17, three guide rails 19 are uniformly arranged on the inner cylindrical surface of the middle part of the partition cylinder 13 in the circumferential direction; three L-shaped rods 18 are respectively arranged in the three guide rails 19 in a sliding way; one end of each of the three L-shaped rods 18 is fixedly connected with the side face, far away from the A support ring 26, of the A sealing ring 15, and the other end of each of the three L-shaped rods is fixedly connected with the inner ring face of the C sealing ring 12; three L-shaped bars 18 are located in the main channel 20.

As shown in fig. 16, three mounting grooves 43 are uniformly formed in the inner annular surface of the B-shaped support ring 22 in the circumferential direction, and a B-shaped rack 23 is fixedly mounted in each mounting groove 43; three gears 24 are uniformly arranged at the bottom of the inner cylinder of the cylinder shell 4 along the circumferential direction; three A racks 25 are uniformly arranged on the outer circumferential surface of the A supporting ring 26 in the circumferential direction; the three gears 24 are engaged with the three B racks 23 and the three a racks 25, respectively.

As shown in fig. 4, 8 and 10, three arc barrier strips 10 are uniformly distributed in the middle of the channel ring 37 on the cartridge case 4 in the circumferential direction; the filter paper 9B is arranged in the bypass channel 21 and matched with the three arc barrier strips 10; the filtration pores of the A filter paper 8 are smaller than those of the B filter paper 9. The arc-shaped baffle bar is used for blocking the B filter paper 9 in the bypass channel 21, so that the B filter paper 9 is not washed away by the engine oil flowing in the bypass channel 21.

As shown in fig. 16, 17 and 18, the end surface of the a sealing ring 15 far from the a supporting ring 26 is beveled, and the beveled end surface of the a sealing ring 15 is matched with the port of the main channel 20 where the partition cylinder 13 and the corresponding convex ring 34 are located, so that the a sealing ring can be better inserted into the port of the main channel 20 where the partition cylinder 13 and the corresponding convex ring 34 are located. The end surface of the B sealing ring 14 far away from the B supporting ring 22 is a sharp-angled inclined surface; one end surface of the C sealing ring 12 corresponding to the bypass channel 21 is a sharp-angled inclined surface, and the other end is a streamline transition surface; both ends of the bypass channel 21 are provided with inclined surfaces. Such a design facilitates the insertion of the B-seal ring 14 and the C-seal ring 12 into the bypass channel 21 openings, respectively, and good sealing is achieved. The streamlined transition surface of the C-seal ring 12 is to facilitate the flow of oil with little resistance from both sides of the C-seal ring 12. The sealing ring B plays a role in preventing filtered impurities from diffusing into the bypass channel and being retained in the disc channel during normal filtration, and the using effect of the bypass channel is influenced.

The outer sealing ring 1, the inner sealing ring 40, the sealing column 33, the A sealing ring 15, the B sealing ring 14 and the C sealing ring 12 in the invention can be made of materials with certain elasticity. For example, a suitably resilient rubber material is selected.

The threaded cover plate 3, the outer sealing ring 1, the A filter paper 8 and the check valve 5 are all the technologies in the traditional filter.

When the sealing column 33 slides in the B fixing sleeve 39 in a sealing manner, the sealing column 33 is separated from the inner sealing ring 40, and the sealing column 33 and the B fixing sleeve 39 are still sealed, but a situation that oil leaks slightly between the sealing column 33 and the B fixing sleeve 39 may exist, and the influence on the operation of the whole filter is negligible.

The specific working process of the invention is as follows: as shown in fig. 19 (a), when the filter is not in use, the sealing post 33 completely enters the B fixing sleeve 39, and the B spring 31 is in a pre-compressed state; the A sealing ring 15 does not seal the main channel 20, and the A sealing ring 15 has a certain distance with the port of the main channel 20; two ports of the bypass channel 21 are sealed by the C sealing ring 12 and the B sealing ring 14 respectively. The flared ring 6 on the check valve 5 is attached to the inner wall of the threaded cover plate 3, and all of the B holes 45 are located in the flared ring 6.

As shown in fig. 19 (a), when the filter performs a normal oil filtering operation during the driving of the vehicle, oil enters the space formed by the screw cover 3 and the trumpet-shaped ring 6 from the B hole 45 of the screw cover 3, and then the trumpet-shaped ring 6 is spread after the space formed by the screw cover 3 and the trumpet-shaped ring 6 is filled with the oil, and the oil enters the left end internal space of the cartridge case 4. After the left end inner space is filled with the standby oil, the engine oil flows into the right end inner space of the cylinder case 4 from the main passage 20; however, since the B spring 31 is in a pre-compressed state and the a filter paper 8 can perform normal oil filtering operation, after the right end inner space of the cylindrical shell 4 is filled, the pushing force of the oil to the sealing column 33 at this time is hard to overcome the pre-compressed force of the B spring 31, and the sealing column 33 does not operate. The engine oil in the main channel 20 flows into the central cylinder 7 from the hole A38 of the central cylinder 7 after being filtered by the A filter paper 8; after that, the filtered oil in the center cartridge 7 flows out from the center screw hole of the screw cover plate 3.

When the temperature of the oil entering the filter is low and the consistency of the oil is high immediately after the start of the vehicle, the a filter paper 8 in this case is difficult to filter the oil with high consistency. Or, when the a filter paper 8 is filtered for a long time and there is no time for replacement, the a filter paper 8 is clogged and normal oil filtration cannot be performed. For the above two cases that the filter paper A8 can not filter the engine oil, the specific working process of the invention is the same for any one case: in the case where the filter paper a 8 is clogged and the engine oil cannot be normally filtered.

When the filter paper A8 is blocked and cannot normally filter the engine oil, the spaces of the two ports in the cylinder shell 4 are filled with the engine oil, and the main channel 20 is filled with the engine oil. As shown in fig. 19 (B), as the pressure of the engine oil in the cartridge 4 is higher, the pushing force of the engine oil on the sealing post 33 overcomes the pre-pressure of the B spring 31, the sealing post 33 moves toward the fixing ring 32, the B spring 31 continues to be compressed, the sealing post 33 drives the a sealing ring 15 to move toward the port of the main channel 20 through the connecting post 16, the supporting rod 27 and the a supporting ring 26, and the a sealing ring 15 drives the C sealing ring 12 to move through the L-shaped rod 18, so that the C sealing ring 12 no longer seals the corresponding port of the bypass channel 21; the a support ring 26 drives the B sealing ring 14 to move through the a rack 25, the gear 24, the B rack 23, and the B support ring 22, so that the B sealing ring 14 no longer seals the corresponding port of the bypass channel 21. When the sealing column 33 slides about half of the distance in the B fixing sleeve 39, the main channel 20 is not sealed by the moved A sealing ring 15, the A sealing ring 15 still has a distance with the corresponding port of the main channel 20, at this time, the moved B sealing ring 14 and the C sealing ring 12 are not sealed with the bypass channel 21 any more, the engine oil in the cylinder shell 4 instantly enters the bypass channel 21, and the pressure of the engine oil in the cylinder shell 4 instantly drops; the instantaneous drop of the oil pressure in the cylinder case 4 can reduce the pushing force of the oil to the sealing post 33, the B spring 31 in the compressed state can restore the sealing post 33 again, and after a series of transmissions, the a sealing ring 15, the B sealing ring 14 and the C sealing ring 12 are restored to the initial positions. After the bypass channel 21 is sealed again, along with the accumulation of the engine oil in the cylinder shell 4, the driving force of the engine oil to the sealing column 33 is gradually increased; when the pushing force of the engine oil to the sealing column 33 is greater than the pre-pressure of the B spring 31, the above-mentioned process that the sealing column 33 slides about half of the distance in the B fixing sleeve 39 is repeated, and the B sealing ring 14 and the C sealing ring 12 do not seal the bypass channel 21 any more. After the flow of the B sealing ring 14 and the C sealing ring 12 no longer sealing the bypass channel 21 and then sealing the bypass channel 21 is repeated several times, the cylinder shell 4 is finally filled with all the engine oil, and the main channel 20 and the bypass channel 21 are also filled with the engine oil, as shown in (B) of fig. 19, at this time, the sealing column 33 is still located in the B fixing sleeve 39, the a sealing ring 15 does not seal the main channel 20 yet, the a sealing ring 15 still has a gap with the corresponding port of the main channel 20, and both the B sealing ring 14 and the C sealing ring 12 no longer seal the bypass channel 21. As shown in fig. 19 (c), as the pressure of the oil in the cartridge case 4 increases, the seal post 33 continues to move toward the fixed ring 32, and the B spring 31 continues to be compressed; when the sealing column 33 is about to slide out of the B fixing sleeve 39, the sealing column 33 drives the a sealing ring 15 to insert into the port of the main channel 20 through the connecting column 16, the supporting rod 27 and the a supporting ring 26, and the a sealing ring 15 seals the corresponding port of the main channel 20. As shown in fig. 19 (d), when the sealing post 33 slides out of the B fixing sleeve 39, the sealing post 33 no longer seals the B fixing sleeve 39, the a sealing ring 15 continues to enter the main channel 20 to better seal the main channel 20, and during this period, the a sealing ring 15 drives the C sealing ring 12 to move through the L-shaped rod 18, so that the C sealing ring 12 continues to no longer seal the corresponding port of the bypass channel 21; the a support ring 26 drives the B sealing ring 14 to move through the a rack 25, the gear 24, the B rack 23, and the B support ring 22, so that the B sealing ring 14 continues to no longer seal the corresponding port of the bypass channel 21. At this time, the flow direction of the oil in the filter is: the engine oil flows into the central cylinder 7 through the B hole 45 of the threaded cover plate 3, the check valve 5, the inner space at the left end of the cylinder shell 4, the bypass channel 21, the inner space at the right end of the cylinder shell 4 and the B fixing sleeve 39, and the engine oil in the central cylinder 7 flows out from the central threaded hole of the threaded cover plate 3. Since the oil will not flow through the main channel 20, the impurities on the a filter paper 8 at the main channel 20, which have been filtered and accumulated before, will not be carried by the oil flowing through the bypass channel 21, and the impurities on the a filter paper 8, which have been filtered and accumulated before, will not enter the engine along with the oil, which provides good protection for the engine and prolongs the service life of the engine.

When the engine oil passes through the B filter paper 9 of the bypass channel 21, the B filter paper 9 can filter large-particle impurities in the engine oil; when encountering engine oil with low temperature and high consistency, the filter pores of the B filter paper 9 still can allow the engine oil to pass through. That is, the filter pores of the B filter paper 9 in the present invention are required to be larger than those of the A filter paper 8; through reasonable selection or manufacture of the B filter paper 9, the filter pores of the B filter paper 9 enable the B filter paper 9 to have the following functions: firstly, the filter paper B9 can filter large-particle impurities in the engine oil; secondly, after more large-particle impurities are filtered, the large pores of the filter paper B9 are basically not blocked; third, the B filter paper 9 allows the engine oil having a low temperature and a high consistency to pass through. The main reasons why the large pores of the B filter paper 9 are not substantially blocked by large particle impurities are: when the filter is normally used in a large number of cases, the engine oil cannot pass through the bypass channel 21, and the filter paper B9 has no impurities; the situation that A filter paper 8 of filter can not normally filter oil is few, and the number of times that machine oil passes through by-pass 21 is few and the filter generally also can remind to follow up to change under this situation, so machine oil passes through by-pass 21 and the machine oil total duration is long not very long, so the large granule impurity that accumulates on B filter paper 9 is not enough to block up B filter paper 9 yet. The situation that the oil of the filter passes through the bypass channel 21 is generally the situation that a driver forgets to replace the filter or cannot replace the filter in time during long-distance driving.

When the filter is no longer in oil passing and stops working, the sealing column 33 is reset into the B fixing sleeve 39 under the reset action of the B spring 31, and the sealing column 33 drives the A sealing ring 15 to be separated from the port of the main channel 20 to be reset through the connecting column 16, the support rod 27 and the A supporting ring 26. When the sealing column 33 enters the B fixing sleeve 39 again, the sealing column 33 does not block the B fixing sleeve 39 any more, and during the period, the sealing ring a 15 drives the sealing ring C12 to move through the L-shaped rod 18, so that the sealing ring C12 seals the corresponding port of the bypass channel 21; the a support ring 26 drives the B sealing ring 14 to move through the a rack 25, the gear 24, the B rack 23, and the B support ring 22, so that the B sealing ring 14 seals the corresponding port of the bypass channel 21.

While the present invention has been described in conjunction with the above embodiments, the present invention is not limited to the above embodiments but is limited only by the appended claims, and those skilled in the art can easily make modifications and variations thereto without departing from the true spirit and scope of the present invention.

Claims

1. The utility model provides a filter, it includes external seal circle, bottom plate, thread cover plate, cartridge case, check valve, its characterized in that: the device also comprises a central cylinder, filter paper A, a sealing ring C, a separating cylinder, a sealing ring B, a sealing ring A, a supporting ring B, a supporting ring A, a spring A, a fixing sleeve A, a positioning sleeve, a spring B, a sealing column and a fixing sleeve B, wherein a bottom plate is arranged at one end of the cylinder shell, an outer sealing ring is arranged on the bottom plate, and a threaded cover plate with a plurality of holes B uniformly distributed in the circumferential direction is arranged in the cylinder shell and connected with the bottom plate; a separating cylinder is arranged in the cylinder shell, and a central cylinder is arranged in the separating cylinder; a channel ring is arranged on the inner wall of the cylinder shell, and a bypass channel is formed between the channel ring and the separating cylinder; a plurality of holes A are uniformly distributed on the central cylinder, convex rings are arranged at two ends of the central cylinder, and A filter paper is arranged between the two convex rings; the center of the bottom of the inner cylinder of the cylinder shell is fixedly provided with an A fixed sleeve; the two sides of the bottom of the central cylinder, which are close to the fixed sleeve A, are respectively and fixedly provided with a fixed sleeve B and a positioning sleeve, the fixed sleeve B is positioned in the central cylinder, and the positioning sleeve is positioned on the outer side of the central cylinder; one part of the positioning sleeve is sleeved on the A fixing sleeve; one end of a spring A positioned in the positioning sleeve is contacted with the end surface of the fixing sleeve A, and the other end of the spring A is contacted with the side surface of the central cylinder; the sealing column slides in the B fixing sleeve in a sealing way, and a B spring for resetting the sealing column is arranged on the sealing column;

a main channel is formed between the central cylinder and the separating cylinder; one end of a connecting column in the fixed sleeve A is fixedly connected with the side surface of the sealing column, and three support rods are uniformly distributed at the other end of the connecting column in the circumferential direction; one ends of the three support rods, which are far away from the connecting column, are fixedly provided with a support ring A; the three supporting rods slide on the fixing sleeve A; the sealing ring A matched with the main channel is fixedly arranged on the side surface of the support ring A; the sealing ring C matched with one port of the bypass channel close to the threaded cover plate is in synchronous transmission connection with the sealing ring A; the B support ring and the A support ring which are slidably arranged at the bottom of the cylinder shell are in transmission connection, and the axial movement directions of the B support ring and the A support ring are always opposite and the speeds of the B support ring and the A support ring are the same; a sealing ring B matched with one port of the bypass channel, which is far away from the threaded cover plate, is fixedly arranged on the side surface of the supporting ring B;

2. A filter as claimed in claim 1, wherein: the outer cylinder surface of the partition cylinder close to two ends is arranged on the inner wall of the channel ring of the cylinder shell through a plurality of A connecting blocks which are uniformly distributed in the circumferential direction; each convex ring on the central cylinder is arranged on the inner cylinder surface of the separating cylinder through a plurality of B connecting blocks which are uniformly distributed in the circumferential direction.

3. A filter as claimed in claim 1, wherein: the spring A and the spring B are always in a compressed state.

4. A filter as claimed in claim 1, wherein: one ends of the three branch strips which are uniformly distributed in the circumferential direction are fixedly connected with the end face, far away from the positioning sleeve, of the fixing sleeve B respectively, and the other end of the branch strips is fixedly provided with a fixing ring; one end of a spring B positioned in the three branch bars is fixedly connected with the fixing ring, and the other end of the spring B is fixedly connected with the end face of the sealing column.

5. A filter as claimed in claim 1, wherein: the one end department that above-mentioned fixed cover B is close to the position sleeve has the retaining ring, and interior sealing washer is installed on the retaining ring, and interior sealing washer and sealed post cooperation.

6. A filter as claimed in claim 1, wherein: the fixing sleeve A is uniformly provided with three sliding grooves in the circumferential direction, and the three support rods slide in the three sliding grooves respectively; the fixing sleeve A is positioned in the supporting ring A.

7. A filter as claimed in claim 1, wherein: three guide rails are uniformly arranged on the inner cylinder surface in the middle of the partition cylinder in the circumferential direction; three L-shaped rods are respectively installed in the three guide rails in a sliding manner; one end of each L-shaped rod is fixedly connected with the side face, far away from the support ring A, of the sealing ring A, and the other end of each L-shaped rod is fixedly connected with the inner ring face of the sealing ring C; three L-shaped rods are all located in the main channel.

8. A filter as claimed in claim 1, wherein: three mounting grooves are uniformly formed in the inner ring surface of the support ring B in the circumferential direction, and a rack B is fixedly arranged in each mounting groove; three gears are uniformly arranged at the bottom of the inner cylinder of the cylinder shell in the circumferential direction; three racks A are uniformly arranged on the outer ring surface of the support ring A in the circumferential direction; the three gears are respectively meshed with the three racks B and the three racks A.

9. A filter as claimed in claim 1, wherein: three arc barrier strips are uniformly distributed in the circumferential direction of the inner part of the channel ring on the cylinder shell; the filter paper B is arranged in the bypass channel and matched with the three arc barrier strips; the filter pores of the filter paper A are smaller than those of the filter paper B.

10. A filter as claimed in claim 1, wherein: the end face, far away from the support ring A, of the sealing ring A is provided with an inclined plane, and the end face, with the inclined plane, of the sealing ring A is matched with the partition cylinder and the port of the main channel, where the corresponding convex ring is located; the end surface of the sealing ring B far away from the supporting ring B is a sharp-angled inclined surface; one end surface of the sealing ring C corresponding to the bypass channel is a sharp-angled inclined surface, and the other end of the sealing ring C is a streamline transition surface; the two ports of the bypass channel are provided with inclined planes.