Self-lubricating high-wear-resistance copper-iron-based oil bearing

Abstract

The invention discloses a self-lubricating high-wear-resistance copper-iron-based oil bearing, and belongs to the technical field of bearings, the self-lubricating high-wear-resistance copper-iron-based oil bearing comprises an outer ring fixedly mounted on a bearing seat, an inner ring is arranged on the inner side of the outer ring, a ball is arranged between the outer ring and the inner ring, and a retainer is mounted on the outer side of the ball; a sealing plate is fixedly installed on the outer side of the inner ring through fixing bolts, a sealing piece is fixedly installed on the outer side of the outer ring through fixing bolts, an elastic bag body is installed on the side, close to the balls, of the sealing plate, lubricating oil is stored in the inner side of the elastic bag body, and an oil conveying hole used for conveying the lubricating oil is formed in the outer wall of the elastic bag body. Meanwhile, a conveying control assembly used for controlling the conveying direction of the lubricating oil is further arranged on the elastic bag body. According to the self-lubricating high-wear-resistance copper-iron-based oil bearing, efficient dust prevention can be achieved, oil can be automatically stored and filtered, efficient self-lubricating is achieved, wear of the bearing is effectively reduced, and the service life is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of bearings, and particularly to a self-lubricating and highly wear-resistant copper-iron-based oil-impregnated bearing. Background Art

[0002] The copper-iron-based oil-impregnated bearing is a porous bearing made of copper powder and iron powder as the main raw materials, processed through die pressing, high-temperature sintering, and vacuum oil impregnation.

[0003] The prior art (a Chinese patent with the publication number CN219692019U) discloses a powder metallurgy oil-impregnated bearing capable of storing oil, including an outer bearing ring and an inner bearing ring. Oil storage grooves are provided inside both the outer bearing ring and the inner bearing ring. Oil storage pipes are fixedly connected inside the oil storage grooves. An oil inlet hole is provided at the top of the oil storage pipe, and the oil inlet hole is communicated with the oil storage pipe. An oil seepage port is provided at the bottom of the oil storage pipe, and a cavity is provided at the bottom of the oil seepage port. The oil storage pipe, the oil seepage port, and the cavity are communicated. A sponge is filled inside the cavity. Oil outlet ports are provided on the side walls of both the outer bearing ring and the inner bearing ring. For this powder metallurgy oil-impregnated bearing capable of storing oil, lubricating oil is injected into the oil storage pipe through the oil inlet hole with a syringe. The lubricating oil inside the oil storage pipe will enter the sponge inside the cavity through the oil seepage port. Through the oil outlet ports provided on the side walls of the outer bearing ring and the inner bearing ring, the bearing can always maintain a lubricated state. The prior art (a Chinese patent with the publication number CN221838757U) discloses a powder metallurgy oil-impregnated bearing capable of storing oil. The oil storage assembly includes a top bead and a telescopic spring. An oil filling groove is provided on one side of the inner bearing ring. The top bead is arranged inside the oil filling groove. The telescopic spring is connected between the top bead and the bottom of the oil filling groove. A first oil guiding groove is provided inside the inner bearing ring. An oil storage groove is provided on the inner bearing ring. A collection groove is provided inside the inner bearing ring. A connecting rope is provided inside the collection groove. A weight is provided at the bottom of the connecting rope. A sponge is provided inside the collection groove. Oil discharge holes are provided on the inner side of the inner bearing ring. During the use of the bearing, the weight will shake inside the collection groove, causing the weight to impact the sponge. Through the collision of the weight, the sponge is forced to facilitate the discharge of the lubricating oil inside it through the oil discharge holes, improving the lubrication effect. Although the existing oil-impregnated bearings can store oil during use, the method of absorbing oil by the sponge increases the contact area between the oil and air, thereby accelerating the reduction of oil volatilization, making the oil unable to be effectively stored for a long time, and there are certain defects in use. Summary of the Invention

[0004] The object of the present invention is to provide a self-lubricating and highly wear-resistant copper-iron-based oil-impregnated bearing to solve the problem proposed in the above background technology that although the oil-impregnated bearings on the current market can store oil, the method of absorbing oil by sponge increases the contact area between the oil and air, thus accelerating the volatilization reduction of the oil, making the oil unable to be stored effectively and for a long time.

[0005] To achieve the above object, the present invention provides the following technical solution: A self-lubricating and highly wear-resistant copper-iron-based oil-impregnated bearing includes an outer ring fixedly installed on a bearing seat. An inner ring is arranged inside the outer ring, and balls are arranged between the outer ring and the inner ring, and a cage is installed outside the balls. A sealing plate is fixedly installed on the outer side of the inner ring through a fixing bolt, and a sealing piece is fixedly installed on the outer side of the outer ring through a fixing bolt. An elastic capsule is installed on the side of the sealing plate close to the balls, and lubricating oil is stored inside the elastic capsule. An oil delivery hole for delivering the lubricating oil is opened on the outer wall of the elastic capsule. At the same time, a delivery control component for controlling the delivery direction of the lubricating oil is also arranged on the elastic capsule. Magnetic pieces are uniformly and fixedly installed on the inner wall of the elastic capsule.

[0006] Preferably, a groove structure is opened on the side of the sealing plate away from the inner ring, and the sealing piece is arranged in an annular structure. The sealing plate and the sealing piece do not fit each other. An arc portion is arranged at the inner wall of the sealing piece, and the arc portion corresponds to the groove structure opened on the sealing plate. An S-shaped gap for improving the dust-proof effect is formed between the arc portion and the sealing plate.

[0007] Preferably, an elastic film is fixedly installed on the outer side of the sealing plate. The elastic film is arranged in a circular ring structure, and the cross-section of the elastic film is inclined. The outer end of the elastic film fits against the outer wall of the arc portion to achieve the sealing between the sealing plate and the sealing piece.

[0008] Preferably, weight pieces are uniformly and fixedly bonded to the outer side of the elastic film. When the sealing plate drives the elastic film to rotate, the weight pieces will drive the elastic film to undergo elastic deformation under the action of centrifugal force, and the elastic film will move away from the arc portion after deformation.

[0009] Preferably, a threaded through hole is opened on the sealing plate, and an oil injection bolt is threadedly connected to the inner side of the sealing plate. An oil injection hole is opened on the elastic capsule, and the oil injection hole is communicated with the threaded through hole on the sealing plate. Oil is injected into the inside of the elastic capsule through the threaded through hole and the oil injection hole.

[0010] Preferably, during the rotation of the elastic bladder, the magnetic sheet will drive the elastic bladder to undergo elastic deformation under the action of centrifugal force, and the outer wall of the elastic bladder and the inner wall of the outer ring are in clearance fit. When the elastic bladder elastically recovers, it sucks the excess oil between the outer ring and the inner ring through the oil delivery holes, and the oil delivery holes are arranged in an annular structure.

[0011] Preferably, the delivery control assembly includes a first diaphragm fixedly installed at one end inside the elastic bladder. The first diaphragm is made of an elastic material and is arranged in an annular structure. At the same time, the first diaphragm fits against the inner wall of the elastic bladder to cover and block the oil delivery holes.

[0012] Preferably, filter holes are evenly formed in the first diaphragm, and the positions of the filter holes correspond to those of the oil delivery holes. A second diaphragm with an annular structure is arranged outside the first diaphragm. One end of the second diaphragm is fixedly installed on the first diaphragm, and the second diaphragm fits against the first diaphragm to cover and block the filter holes. When the elastic bladder deforms, the oil inside it is discharged through the filter holes and the oil delivery holes. When the elastic bladder elastically recovers, it sucks the excess oil through the oil delivery holes, and the filter holes filter the worn debris in the oil.

[0013] Preferably, during the rotation of the elastic bladder, all the magnetic sheets at each position will pass through the lowermost position, and the magnetic sheets adsorb and aggregate the metal debris filtered out from the oil.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The self-lubricating and highly wear-resistant copper-iron-based oil-impregnated bearing can perform efficient dust prevention, automatically store and filter the oil, achieve efficient self-lubrication, effectively reduce the wear of the bearing, and extend the service life. The specific content is as follows; A sealing plate and a sealing sheet are provided. The outer ring and the inner ring of the bearing can be dust-proofed through the cooperation of the sealing plate and the sealing sheet. Moreover, a labyrinth dust-proof effect can be formed through the cooperation of the curved arc portion and the groove body on the sealing plate to improve the dust-proof effect during the operation of the bearing.

[0015] Furthermore, an elastic film and a counterweight sheet are also provided. When the bearing stops working, the elastic film fits against the arc portion on the sealing sheet, so that the sealing plate and the sealing sheet can be completely sealed through the arc portion and the elastic film, effectively reducing the volatilization rate of the lubricating oil when the bearing is not working, effectively preventing dust and the like from entering the bearing interior, and avoiding significant wear of the bearing during subsequent operation. When the bearing works, the elastic film will undergo elastic deformation under the centrifugal force of the counterweight sheet and then disengage from the arc portion, avoiding rotational wear caused by mutual contact between the two.

[0016] An elastic bladder and an oil delivery hole are provided. When the bearing is working, the elastic bladder will rotate at a high speed, causing the magnetic disc on its inner side to undergo elastic deformation under centrifugal force, so that a part of the lubricating oil stored inside it can be delivered through the oil delivery hole to the inner wall of the outer ring, thus achieving the self-lubrication function.

[0017] Furthermore, when the bearing gradually stops working, the elastic bladder will recover under the action of the elastic force of its own material, so that the elastic bladder can draw out the excess oil from the inner side of the lower end of the outer ring through the oil delivery hole, realizing the storage of the oil, and further reducing the evaporation rate of the oil inside the bearing.

[0018] 3. A magnetic disc, a first diaphragm, a filter hole and a second diaphragm are provided. When the oil delivery hole sucks oil, the first diaphragm undergoes elastic deformation and rotates, opening the oil delivery hole. When the oil delivery hole discharges oil, the second diaphragm will undergo elastic deformation and rotate, enabling the inhaled oil to be discharged after being filtered through the filter hole, so that the metal chips generated by wear in the oil can be collected. At the same time, the magnetic disc can adsorb and concentrate the metal chips for subsequent cleaning, further reducing the wear rate during the operation of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional structure schematic diagram of the present invention; Figure 2 is a sectional structure schematic diagram of the present invention; Figure 3 is a partial exploded structure schematic diagram of the present invention; Figure 4 is a schematic diagram of the mounting structure of the sealing plate of the present invention; Figure 5 is the present invention Figure 4 magnified structure schematic diagram at A in; Figure 6 is a partial structure schematic diagram of the elastic bladder of the present invention; Figure 7 is the present invention Figure 6 magnified structure schematic diagram at B in; Figure 8 is a three-dimensional structure schematic diagram of the sealing piece of the present invention; Figure 9 is a three-dimensional structure schematic diagram of the elastic bladder of the present invention.

[0020] In the figure: 1. Outer ring; 2. Inner ring; 3. Ball; 4. Cage; 5. Sealing plate; 6. Sealing piece; 601. Arc portion; 7. Elastic film; 701. Counterweight piece; 8. Elastic bladder; 801. Oil injection hole; 9. Oil injection bolt; 10. Magnetic disc; 11. Oil delivery hole; 12. First diaphragm; 13. Filter hole; 14. Second diaphragm. DETAILED DESCRIPTION OF THE INVENTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] Embodiment 1: During the use of the existing oil-impregnated bearing, the structure of the sealing cover is fixed, and it is impossible to effectively seal and dust-proof the side of the bearing, resulting in impurities easily invading the inner side of the bearing and accelerating wear. To solve this technical problem, the following technical content is disclosed in this embodiment. Please refer to Figures 1 - 5 as shown; A self-lubricating and highly wear-resistant copper-iron-based oil-impregnated bearing, including an outer ring 1 fixedly installed on a bearing seat. An inner ring 2 is arranged inside the outer ring 1, and a ball 3 is arranged between the outer ring 1 and the inner ring 2, and a cage 4 is installed outside the ball 3; A sealing plate 5 is fixedly installed on the outer side of the inner ring 2 through a fixing bolt, and a sealing piece 6 is fixedly installed on the outer side of the outer ring 1 through a fixing bolt. A groove structure is formed on the side of the sealing plate 5 away from the inner ring 2, and the sealing piece 6 is arranged in an annular structure. The sealing plate 5 and the sealing piece 6 do not fit each other. At the same time, an arc portion 601 is arranged at the inner wall of the sealing piece 6, and the arc portion 601 corresponds to the groove structure formed on the sealing plate 5. An S-shaped gap for improving the dust-proof effect is formed between the arc portion 601 and the sealing plate 5.

[0023] An elastic film 7 is fixedly installed on the outer side of the sealing plate 5. The elastic film 7 is arranged in a circular ring structure, and the cross-section of the elastic film 7 is inclined. The outer end of the elastic film 7 fits against the outer wall of the arc portion 601 to realize the sealing between the sealing plate 5 and the sealing piece 6. Weight pieces 701 are uniformly and fixedly bonded to the outer side of the elastic film 7. When the sealing plate 5 drives the elastic film 7 to rotate, the weight pieces 701 will drive the elastic film 7 to undergo elastic deformation under the action of centrifugal force, and the elastic film 7 will move away from the arc portion 601 after deformation.

[0024] Connect the outer ring 1 and the inner ring 2 to the horizontally arranged bearing seat and the rotating shaft respectively. Before the bearing works, the elastic film 7 will adhere to the arc portion 601 of the sealing piece 6, so as to effectively seal both sides of the outer ring 1 and the inner ring 2, preventing impurities such as dust from entering between the outer ring 1 and the inner ring 2. As the inner ring 2 rotates, it will drive the sealing plate 5 to rotate synchronously. At this time, the elastic film 7 on the sealing plate 5 will rotate synchronously, causing the weight pieces 701 uniformly arranged on the elastic film 7 to pull the edge position of the elastic film 7 to deform and rotate under the action of centrifugal force, so that the elastic film 7 separates from the arc portion 601, thereby avoiding continuous friction and wear between the two during the operation of the bearing. The arc portion 601 and the groove portion of the sealing plate 5 form a labyrinth sealing mechanism, thus achieving effective dust prevention during the operation of the bearing.

[0025] Embodiment 2: The technical content disclosed in this embodiment is a further improvement based on the above Embodiment 1. In the existing oil-impregnated bearing, it is inconvenient to automatically store and lubricate the oil during use, and it is impossible to filter and clean the metal chips in the oil. To further solve this technical problem, the following technical content is disclosed in this embodiment, as Figures 4 - 9 shown; An elastic capsule 8 is installed on the side of the sealing plate 5 close to the ball 3, and lubricating oil is stored inside the elastic capsule 8. An oil delivery hole 11 for delivering the lubricating oil is provided on the outer wall of the elastic capsule 8. At the same time, a delivery control component for controlling the delivery direction of the lubricating oil is also provided on the elastic capsule 8. Magnetic sheets 10 are uniformly and fixedly installed on the inner wall of the elastic capsule 8. A threaded through hole is provided on the sealing plate 5, and an oil injection bolt 9 is threadedly connected to the inside of the sealing plate 5. An oil injection hole 801 is provided on the elastic capsule 8, and the oil injection hole 801 communicates with the threaded through hole on the sealing plate 5. Moreover, oil is injected into the inside of the elastic capsule 8 through the threaded through hole and the oil injection hole 801.

[0026] During the rotation of the elastic capsule 8, the magnetic sheets 10 will drive the elastic capsule 8 to undergo elastic deformation under the action of centrifugal force. The outer wall of the elastic capsule 8 and the inner wall of the outer ring 1 are in clearance fit. When the elastic capsule 8 elastically recovers, it sucks the excess oil between the outer ring 1 and the inner ring 2 through the oil delivery hole 11. At the same time, the oil delivery hole 11 is arranged in an annular structure.

[0027] The conveying control assembly includes a first diaphragm 12 fixedly installed at one end inside the elastic bladder 8. The first diaphragm 12 is made of elastic material and is arranged in an annular structure. At the same time, the first diaphragm 12 fits against the inner wall of the elastic bladder 8 to cover and block the oil delivery hole 11. The first diaphragm 12 is evenly provided with filter holes 13, and the positions of the filter holes 13 and the oil delivery hole 11 are correspondingly arranged. And an annular second diaphragm 14 is arranged outside the first diaphragm 12. At the same time, one end of the second diaphragm 14 is fixedly installed on the first diaphragm 12. Moreover, the second diaphragm 14 fits against the first diaphragm 12 to cover and block the filter holes 13. When the elastic bladder 8 deforms, the oil liquid inside it is discharged through the filter holes 13 and the oil delivery hole 11. And when the elastic bladder 8 elastically recovers, it sucks the excess oil liquid through the oil delivery hole 11. And the filter holes 13 filter the worn debris in the oil liquid. During the rotation of the elastic bladder 8, each magnetic piece 10 will pass through the lowest position, and the magnetic piece 10 adsorbs and aggregates the metal debris filtered out from the oil liquid.

[0028] Through the threaded holes opened on the sealing plate 5 and the oil injection hole 801 on the elastic bladder 8, can lubricating oil liquid be injected into and added to the elastic bladder 8? After the addition is completed, through the connection of the oil injection bolt 9 and the threaded hole, the oil injection hole 801 is blocked. When the bearing is working, the inner ring 2 will drive the sealing plate 5 to rotate synchronously and rapidly. At this time, the sealing plate 5 will drive the elastic bladder 8 adhered to its inner side to rotate synchronously. At this time, the magnetic pieces 10 evenly fixed on the inner wall of the elastic bladder 8 will use centrifugal force to pull the elastic bladder 8 to elastically deform during the rotation, so that the second diaphragm 14 inside the elastic bladder 8 deforms and rotates under the action of pressure. At this time, the oil liquid can be filtered through the filter holes 13 and discharged to the oil delivery hole 11, and then enter the inner wall of the outer ring 1 to realize the automatic injection and lubrication of the lubricating oil liquid. At the same time, the magnetic pieces 10 can adsorb and gather the filtered metal waste chips for subsequent treatment, preventing the metal waste chips from entering the bearing lubrication system again and increasing the wear of the bearing. When the bearing gradually stops working, the elastic bladder 8 will recover under the elastic action of its own material, so that the first diaphragm 12 deforms and rotates towards the inner side of the elastic bladder 8 under the action of pressure, so that the elastic bladder 8 can suck and store the excess lubricating oil liquid on the inner wall of the outer ring 1 through the oil delivery hole 11, reducing the volatilization efficiency of the oil liquid and further improving the lubrication effect of the bearing and the lubrication duration of the oil liquid.

[0029] In the description of the present invention, unless otherwise specified, "a plurality of" means two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present invention. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A self-lubricating and highly wear-resistant copper-iron-based oil-impregnated bearing, comprising an outer ring (1) fixedly installed on a bearing seat. An inner ring (2) is arranged inside the outer ring (1), and balls (3) are arranged between the outer ring (1) and the inner ring (2). A cage (4) is installed on the outer side of the balls (3). It is characterized in that A sealing plate (5) is fixedly installed on the outer side of the inner ring (2) through fixing bolts, and a sealing piece (6) is fixedly installed on the outer side of the outer ring (1) through fixing bolts. An elastic capsule (8) is installed on one side of the sealing plate (5) close to the balls (3). Lubricating oil liquid is stored inside the elastic capsule (8). An oil delivery hole (11) for delivering the lubricating oil liquid is formed in the outer wall of the elastic capsule (8). At the same time, a delivery control assembly for controlling the delivery direction of the lubricating oil liquid is arranged on the elastic capsule (8). Magnetic sheets (10) are uniformly and fixedly installed on the inner wall of the elastic capsule (8).

2. The self-lubricating and highly wear-resistant copper-iron-based oil-impregnated bearing according to claim 1, characterized in that: A groove structure is formed on one side of the sealing plate (5) away from the inner ring (2). The sealing piece (6) is arranged in an annular structure. The sealing plate (5) and the sealing piece (6) do not fit together. An arc portion (601) is arranged at the inner wall of the sealing piece (6). The arc portion (601) corresponds to the groove structure formed on the sealing plate (5) in terms of position. An S-shaped gap for improving the dust-proof effect is formed between the arc portion (601) and the sealing plate (5).

3. The self-lubricating and highly wear-resistant copper-iron-based oil-impregnated bearing according to claim 2, wherein: An elastic film (7) is fixedly installed on the outer side of the sealing plate (5). The elastic film (7) is arranged in a circular ring structure. The cross section of the elastic film (7) is inclined. The outer end of the elastic film (7) fits against the outer wall of the arc portion (601) to achieve sealing between the sealing plate (5) and the sealing piece (6).

4. The self-lubricating and highly wear-resistant copper-iron-based oil-impregnated bearing according to claim 3, wherein: Counterweight pieces (701) are uniformly and fixedly bonded to the outer side of the elastic film (7). When the sealing plate (5) drives the elastic film (7) to rotate, the counterweight pieces (701) will drive the elastic film (7) to undergo elastic deformation under the action of centrifugal force, and the elastic film (7) will move away from the arc portion (601) after deformation.

5. The self-lubricating and highly wear-resistant copper-iron-based oil-impregnated bearing according to claim 1, wherein: Threaded through holes are formed in the sealing plate (5). An oil injection bolt (9) is threadedly connected to the inside of the sealing plate (5). An oil injection hole (801) is formed in the elastic capsule (8). The oil injection hole (801) is communicated with the threaded through holes in the sealing plate (5). Oil is injected into the inside of the elastic capsule (8) through the threaded through holes and the oil injection hole (801).

6. The self-lubricating and highly wear-resistant copper-iron-based oil-impregnated bearing according to claim 1, wherein: During the rotation of the elastic capsule (8), the magnetic sheets (10) will drive the elastic capsule (8) to undergo elastic deformation under the action of centrifugal force. The outer wall of the elastic capsule (8) and the inner wall of the outer ring (1) are in clearance fit. When the elastic capsule (8) elastically recovers, it sucks the excess oil liquid between the outer ring (1) and the inner ring (2) through the oil delivery holes (11). The oil delivery holes (11) are arranged in an annular structure.

7. A self-lubricating and highly wear-resistant copper-iron-based oil-impregnated bearing according to claim 1, characterized in that: The conveying control assembly includes a first diaphragm (12) with one end fixedly installed inside the elastic bladder (8). The first diaphragm (12) is made of an elastic material and is arranged in an annular structure. At the same time, the first diaphragm (12) fits against the inner wall of the elastic bladder (8) to cover and block the oil delivery hole (11).

8. The self-lubricating and highly wear-resistant copper-iron-based oil-impregnated bearing according to claim 7, wherein: Filter holes (13) are evenly formed in the first diaphragm (12), and the positions of the filter holes (13) and the oil delivery hole (11) are correspondingly arranged. A second diaphragm (14) with an annular structure is arranged outside the first diaphragm (12). At the same time, one end of the second diaphragm (14) is fixedly installed on the first diaphragm (12), and the second diaphragm (14) fits against the first diaphragm (12) to cover and block the filter holes (13). When the elastic bladder (8) deforms, the oil inside it is discharged through the filter holes (13) and the oil delivery hole (11). When the elastic bladder (8) elastically recovers, it sucks the excess oil through the oil delivery hole (11), and the filter holes (13) filter the worn debris in the oil.

9. The self-lubricating and highly wear-resistant copper-iron-based oil-impregnated bearing according to claim 1, wherein: During the rotation of the elastic bladder (8), each magnetic piece (10) will pass through the lowest position, and the magnetic pieces (10) adsorb and aggregate the metal debris filtered out of the oil.

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