A lubricating oil purifier

Abstract

The present application relates to the technical field of lubricating oil purification equipment, including a lubricating oil purifier, comprising a housing, one end of which is fixedly fitted with an end cap I, the outer edge of which is provided with an oil inlet hole, an inner metal mesh cylinder being provided within the housing, a long fiber filter element covering all oil guide grooves being provided on the outer side of the inner metal mesh cylinder, a spunlace non-woven fabric being fixedly fitted on the outer side of the long fiber filter element, and an outer metal mesh cylinder being fitted on the outer side of the spunlace non-woven fabric. Lubricating oil is filtered by providing the spunlace non-woven fabric and the long fiber filter element, and the spunlace non-woven fabric is used to intercept larger impurities in the lubricating oil, thereby improving the filtering effect. Furthermore, the outer metal mesh cylinder is arranged to be rotatable relative to the spunlace non-woven fabric and the long fiber filter element, thereby changing the path of the lubricating oil flowing from the outside to the inside of the long fiber filter element, thereby reducing the blockage caused by impurities stored in the original filtering path and improving the long-term filtering effect.

Description

Technical Field

[0001] The present application relates to the technical field of lubricating oil purification equipment, and in particular to a lubricating oil purifier. Background Art

[0002] A lubricating oil purifier is a device used to clean and filter lubricating oil to remove impurities and contaminants in the lubricating oil. Commonly used lubricating oil purifiers mainly use filter paper as a filter element to filter impurities in the lubricating oil. However, when the lubricating oil purifier is used in an engine, especially a new energy engine, it will produce distilled water and emulsified water. A single filter paper as a filter element cannot effectively handle the two types of water, resulting in poor filtering effect.

[0003] Some existing lubricating oil purifiers use non-woven fabrics and fiber structures instead of filter paper. Since non-woven fabrics and fiber structures are relatively soft and easily deformed or damaged, metal mesh is needed to provide structural support to maintain the shape and stability of the filter element. The close fit between the metal mesh and the non-woven fabric and fiber structure will cause the lubricating oil to enter the non-woven fabric and fiber structure at a consistent position, that is, the lubricating oil flows from the gaps in the metal mesh to the non-woven fabric and fiber structure. This makes the path for the lubricating oil to flow through the non-woven fabric and fiber structure single, and impurities are easily accumulated at the entrance of the non-woven fabric and fiber structure. After the filtration path of the fiber structure is blocked, it leads to low subsequent filtration efficiency. Summary of the Invention

[0004] The present application proposes a lubricating oil purifier having the advantages of high filtering effect and efficiency, and is used to solve the problem that the existing lubricating oil purifier uses filter paper resulting in poor filtering effect, and uses non-woven fabrics and limiting structures resulting in low filtering efficiency.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical solution: a lubricating oil purifier, comprising a shell, one end of which is fixedly sheathed with an end cover I, the outer edge of which is provided with an oil inlet hole, the inner edge of which is fixedly sheathed with a check valve rubber sleeve, the end of which is away from the end cover I is fixedly sheathed with a positioning plate, the side of which is away from the check valve rubber sleeve is fixedly sheathed with an inner metal mesh tube, the inner metal mesh tube is provided with a plurality of groups of oil guide grooves arranged at equal distances, each group of oil guide grooves is provided with four oil guide grooves, and each group of oil guide grooves is distributed in a circular array on the inner metal mesh tube. A long fiber filter element covering all the oil guide grooves is provided on the outside of the inner metal mesh cylinder, and a spunlace non-woven fabric is fixedly sheathed on the outside of the long fiber filter element. An outer metal mesh cylinder is sheathed on the outside of the spunlace non-woven fabric. A plurality of oil inlet grooves are provided on the outer metal mesh cylinder, and the plurality of oil inlet grooves are arrayed on the outer metal mesh cylinder in the form of a circular curve. The lubricating oil to be purified flows from the various oil inlet grooves on the outer metal mesh cylinder to the inside of the inner metal mesh cylinder. When the pressure of the lubricating oil between the outer shell and the outer metal mesh cylinder increases, the outer metal mesh cylinder rotates in one direction relative to the spunlace non-woven fabric.

[0006] Furthermore, two limiting plates are fixedly mounted on the inner metal mesh cylinder, and the two limiting plates are respectively arranged at both ends of the long fiber filter element.

[0007] Furthermore, both ends of the outer metal mesh cylinder are fixedly fitted with passive turntables, and the passive turntable is connected to the inner metal mesh cylinder through a bearing. The passive turntable is located on the side of the limiting disk away from the long fiber filter element, and the side of the passive turntable is close to the side of the limiting disk but not in contact.

[0008] Furthermore, the outer movable sleeve of the inner metal mesh tube is provided with a piston located on one side of a passive turntable, a passive turntable is fixedly provided with a limit tube on one side of the piston, the piston is away from the tooth groove portion on the side of the limit tube, and the outer diameter value of the sealing portion of the piston is greater than the outer diameter value of its tooth groove portion, and the outer side of the tooth groove portion of the piston is provided with a plurality of connected limit tooth groove groups, the limit tooth groove group consists of an inclined groove I, an inclined groove II and a transverse groove, and the inclined groove I, the inclined groove II and the transverse groove are connected in sequence, the inclined directions of the inclined groove I and the inclined groove II are opposite, and the inner movable sleeve of the outer shell A limit sliding plate is provided on one side of the piston, and a spring I is provided between the piston and the limit sliding plate. The limit sliding plate, the end of the shell away from the end cover I is fixedly covered with an end cover II, and a spring II is provided between the end cover II and the limit sliding plate. Under normal settings, the elastic force value of the spring II on the limit sliding plate is greater than the elastic force value of the spring I on the limit sliding plate. The limit sliding plate is fixedly covered with a limit rod on the side facing the piston, and the limit rod is located on the inner side of the spring I. The end of the limit rod away from the limit sliding plate is fixedly connected to the limit shaft, and the bottom end of the limit shaft is movably engaged with the limit tooth groove group.

[0009] Furthermore, the piston and spring I are movably arranged.

[0010] Furthermore, the length of the tooth groove portion exceeds half of the length of the sealing portion.

[0011] Furthermore, a sealing ring is provided on the outer side of the sealing portion of the piston, which is movably connected and sealed to the inner wall of the shell, and sealing rings are provided on both ends of the inner wall of the piston, which are movably connected and sealed to the outer wall of the inner metal mesh tube.

[0012] Furthermore, the side surface of the piston sealing portion is fixedly connected with linkage shafts having the same number as the limiting tubes, and each linkage shaft is movably sleeved with the corresponding limiting tube.

[0013] Furthermore, the thickness of the long fiber filter element is set to 15mm-30mm.

[0014] Beneficial effects of the present invention:

[0015] 1. The present application provides a lubricating oil purifier, which filters lubricating oil by setting a spunlace non-woven fabric and a long fiber filter element. The spunlace non-woven fabric is used to intercept larger impurities in the lubricating oil, and is further filtered in combination with a spunlace non-woven fabric with a filter thickness of 15mm-30mm. Compared with the existing lubricating oil purifier that uses filter paper for filtration, the filter thickness is increased, which not only improves the filtration effect, but also provides sufficient storage space for impurities filtered from the lubricating oil, increases the dirt holding capacity of the long fiber filter element during filtration, and avoids the problem of frequent replacement of the filter structure.

[0016] 2. By arranging an outer metal mesh cylinder on the outside of the spunlace non-woven fabric and an inner metal mesh cylinder on the inside of the long fiber filter element, the long fiber filter element and the spunlace non-woven fabric are supported, thereby avoiding the deformation or damage of the spunlace non-woven fabric and the long fiber filter element due to the impact of high-pressure oil, and the service life of the Yancheng filter element. In addition, by using the spunlace non-woven fabric and the long fiber filter element at the same time, the distilled water and emulsified water in the lubricating oil can be adsorbed and removed during the filtering of the lubricating oil, thereby further improving the filtering effect of the lubricating oil.

[0017] 3. By arranging an outer metal mesh cylinder on the outside of the spunlace non-woven fabric, and the outer metal mesh cylinder is arranged to be rotatable relative to the spunlace non-woven fabric and the long fiber filter element, the path of the lubricating oil flowing from the outside to the inside of the long fiber filter element is changed, thereby changing the oil filtration path inside the long fiber filter element, so that the blockage caused by impurities stored in the original filtration path is reduced, thereby ensuring that the long fiber filter element can still have a high filtering effect and efficiency after being used for a period of time.

[0018] 4. A piston is arranged in the outer shell to be linked to the outer metal mesh cylinder, and a limit tooth groove group is arranged on the piston. The limit shaft cooperates with the limit tooth groove group to limit the limit tooth groove group. As the filtration period progresses, impurities accumulate at the outer inlet edge of the spunlace non-woven fabric and the long fiber filter element, and the flow rate of the lubricating oil gradually decreases, the oil pressure in the outer shell increases, and the piston is pushed to move. At the same time, the cooperation of the limit tooth groove group and the limit shaft enables the piston to drive the outer metal mesh cylinder to rotate, thereby automatically changing the path of the lubricating oil from the outside to the inside of the long fiber filter element, without manual control, which is convenient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments disclosed herein and, together with the description, serve to explain the principles disclosed herein.

[0020] The present application can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0021] Figure 1 It is a schematic cross-sectional view of the lubricating oil purifier of the present invention;

[0022] Figure 2 for Figure 1 A local enlarged structural diagram of point A;

[0023] Figure 3 for Figure 1 Schematic diagram of the complete structure of Chinese and foreign metal mesh tubes;

[0024] Figure 4 for Figure 1 A complete structural diagram of one of the passive turntables;

[0025] Figure 5 for Figure 1 Schematic diagram of the complete structure of the middle piston;

[0026] Figure 6 for Figure 5 Front view of the middle piston.

[0027] In the picture:

[0028] 1. Outer casing; 2. End cover I; 201. Oil inlet hole; 3. Check valve rubber sleeve; 4. Positioning plate; 5. Inner metal mesh cylinder; 501. Oil guide groove; 502. Bypass groove; 6. Limiting plate; 7. Long fiber filter element; 8. Passive rotary plate; 9. Outer metal mesh cylinder; 901. Oil inlet groove; 10. Spunlace non-woven fabric; 11. Limiting tube; 12. Piston; 13. Limiting tooth groove group; 131. Inclined groove I; 132. Inclined groove II; 133. Horizontal groove; 14. Linkage shaft; 15. Limiting slide plate; 16. Limiting rod; 17. Limiting shaft; 18. Spring I; 19. Sealing plug; 20. End cover II; 21. Spring II. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0030] Example

[0031] See also Figure 1, a lubricating oil purifier comprises an outer shell 1, an end cover Ⅰ2 is fixedly sleeved on one end inside the outer shell 1, and a plurality of oil inlet holes 201 distributed in a circumferential array are opened on the outer edge of the end cover Ⅰ2, and a check valve sleeve 3 is fixedly sleeved on the inner edge of the end cover Ⅰ2 close to the inner side of the outer shell 1. The outer edge of the check valve sleeve 3 fits the outer edge of the end cover Ⅰ2 under normal circumstances to form a blockage for the oil inlet hole 201. Under the action of the oil pump, when the lubricating oil flows through the oil inlet hole 201, the outer edge of the check valve sleeve 3 will be opened, thereby flowing in along the inner wall of the outer shell 1, and the end of the check valve sleeve 3 away from the end cover Ⅰ2 is fixedly sleeved with a positioning plate 4, and a gap for oil flow is reserved between the outer edge of the positioning plate 4 and the inner wall of the outer shell 1. The side of the positioning plate 4 away from the check valve sleeve 3 is fixedly connected to an inner metal mesh tube 5, and the end of the inner metal mesh tube 5 away from the positioning plate 4 is fixedly sleeved with a sealing plug 19.

[0032] See also Figure 1 and Figure 2 , two limiting disks 6 are fixedly mounted on the inner metal mesh cylinder 5, and a long fiber filter element 7 is provided between the two limiting disks 6 and mounted on the outer side of the inner metal mesh cylinder 5. The outer side of the long fiber filter element 7 is fixedly mounted with a spunlace non-woven fabric 10, and a plurality of groups of oil guide grooves 501 are opened on the inner metal mesh cylinder 5 and arranged at equal distances, and the oil guide grooves 501 are located on the inner side of the long fiber filter element 7. The long fiber filter element 7 covers all the oil guide grooves 501 to ensure that the external lubricating oil flows through the long fiber filter element 7 to the inside of the inner metal mesh cylinder 5 and then flows out from the internal channel of the end cover Ⅰ2. There are four oil guide grooves 501 in each group, and each group of oil guide grooves 501 is distributed in a circular array on the inner metal mesh cylinder 5. Two passive turntables 8 are fixedly mounted on the inner metal mesh cylinder 5 through bearings. The two passive turntables 8 are respectively arranged on the side of the two limiting disks 6 away from the long fiber filter element 7. The side of the passive turntable 8 is close to the side of the limiting disk 6 but does not touch. An outer metal mesh cylinder 9 is fixedly mounted between the outer edges of the two passive turntables 8. Figure 3, a plurality of oil inlet grooves 901 are provided on the outer metal mesh cylinder 9, and the plurality of oil inlet grooves 901 are arrayed on the outer metal mesh cylinder 9 in the form of a circular curve. After controlling the outer metal mesh cylinder 9 to rotate relative to the spunlace non-woven fabric 10 and the long fiber filter element 7, the position of the lubricating oil flowing to the spunlace non-woven fabric 10 and the long fiber filter element 7 through the oil inlet groove 901 can be changed, thereby changing the flow path of the lubricating oil in the long fiber filter element 7, and thus the outer metal mesh cylinder 9 is arranged on the outside of the long fiber filter element 7 and the spunlace non-woven fabric 10, in conjunction with the structural design of the inner metal mesh cylinder 5, to form a support for the long fiber filter element 7 and the spunlace non-woven fabric 10, thereby avoiding the problem that the spunlace non-woven fabric 10 and the long fiber filter element 7 are deformed or damaged by the impact of high-pressure oil, and the outer metal mesh cylinder 9 can also be used to rotate in more than one direction relative to the spunlace non-woven fabric 10 to change the path of the lubricating oil flowing through the long fiber filter element 7, thereby avoiding the problem that the lubricating oil flows in a single path in the long fiber filter element 7 and is easily blocked quickly. The thickness of the long fiber filter element 7 can be set to 15mm-30mm, so that the long fiber filter element 7 has an increased filtering thickness compared to the existing filter paper structure with a thickness of only 0.7mm-1.3mm, which not only improves the filtering effect, but also provides sufficient storage space for impurities filtered in the lubricating oil, increases the dirt holding capacity of the long fiber filter element 7 during filtration, avoids the problem of frequent replacement of the filtering structure, and cooperates with the rotation of the outer metal mesh cylinder 9 to change the path of the lubricating oil from the outside to the inside of the long fiber filter element 7, thereby changing the oil filtering path inside the long fiber filter element 7, so that the blockage caused by impurities stored in the original filtering path is less affected, to ensure that the long fiber filter element 7 can still have a high filtering effect and efficiency after being used for a period of time, and by using the spunlace non-woven fabric 10 and the long fiber filter element 7 at the same time, it can adsorb and remove distilled water and emulsified water in the lubricating oil when filtering the lubricating oil, further improving the lubricating oil filtering effect.

[0033] Please continue reading Figure 1 and Figure 2 The outer movable sleeve of the inner metal mesh cylinder 5 is provided with a piston 12, and a passive turntable 8 is fixedly provided with a limit tube 11 on one side facing the piston 12. Figure 4 The number of the limiting tubes 11 is four, and the four limiting tubes 11 are distributed in a circular array on the side of the passive turntable 8, see Figure 1 、 Figure 2 and Figure 5-Figure 6The piston 12 is provided with a sealing portion on the side facing the limiting tube 11, and the piston 12 is away from the tooth groove portion on the side of the limiting tube 11, and the outer diameter of the sealing portion of the piston 12 is greater than the outer diameter of its tooth groove portion, and the length of the tooth groove portion exceeds half of the length of the sealing portion. A sealing ring is provided on the outer side of the sealing portion of the piston 12, which is movably sleeved and sealed with the inner wall of the shell 1. Both ends of the inner wall of the piston 12 are provided with sealing rings that are movably sleeved and sealed with the outer wall of the inner metal mesh tube 5. Through the setting of the piston 12, leakage of lubricating oil at the outer metal mesh tube 9 is prevented. The side of the sealing portion of the piston 12 is fixedly connected with a linkage shaft 14 with the same number as the limiting tube 11, and each linkage shaft 14 is movably sleeved with the corresponding limiting tube 11. By utilizing the sleeve setting of the limiting tube 11 and the linkage shaft 14, when the piston 12 rotates, it can drive the passive turntable 8 and the outer metal mesh tube 9 to rotate together.

[0034] The outer side of the tooth groove portion of the piston 12 is provided with a plurality of connected limiting tooth groove groups 13, please refer to Figure 5-Figure 6 The limiting tooth groove group 13 is composed of an inclined groove I 131, an inclined groove II 132 and a transverse groove 133, and the inclined groove I 131, the inclined groove II 132 and the transverse groove 133 are connected in sequence. The inclined directions of the inclined groove I 131 and the inclined groove II 132 are opposite. Please continue to refer to Figure 1-Figure 2 , the internal movably sleeve of the shell 1 is provided with a limit sliding plate 15 located on one side of the piston 12, and a spring I18 is provided between the piston 12 and the limit sliding plate 15, and the limit sliding plate 15 is fixedly provided with a limit rod 16 on the side facing the piston 12, and the limit rod 16 is located on the inner side of the spring I18, and the end of the limit rod 16 away from the limit sliding plate 15 is fixedly connected to the limit shaft 17, and the bottom end of the limit shaft 17 is movably engaged with the limit tooth groove group 13. The piston 12 and the spring I18 are movably arranged so that the spring I18 does not affect the rotation of the piston 12. At the same time, under the limiting action of the limit sliding plate 15, the spring I18 has an elastic force on the piston 12 toward the side of the end cover I2, and the end of the shell 1 away from the end cover I2 is fixedly provided with an end cover II20. The end cover II20 and the limit sliding plate are fixedly provided with an end cover II20. A spring II 21 is provided between the disks 15, and the two ends of the spring II 21 are fixedly connected to the side surfaces of the limiting sliding disk 15 and the end cover II 20 respectively. The torsional force of the spring II 21 is used to ensure that the limiting sliding disk 15 only moves within the outer shell 1 and does not rotate, and the elastic force value of the spring II 21 on the limiting sliding disk 15 under normal settings is greater than the elastic force value of the spring I 18 on the limiting sliding disk 15. A group of bypass grooves 502 located at the piston 12 is provided on the inner metal mesh tube 5, and the number of each group of bypass grooves 502 is four. The four bypass grooves 502 are distributed in a circular array on the inner metal mesh tube 5, and the bypass grooves 502 are close to the sealing ring on the side of the tooth groove part of the piston 12. The piston 12 blocks the bypass grooves 502 to prevent lubricating oil from leaking at the bypass grooves 502 during normal use.

[0035] During use, the lubricating oil to be purified flows into the housing 1 through the oil inlet holes 201 on the end cover Ⅰ2 and fills the space between the inner wall of the housing 1 and the outer wall of the outer metal mesh tube 9. Under the pressure of continuous pumping oil, the lubricating oil flows through the small holes on the oil inlet groove 901 to the spunlace non-woven fabric 10 and the long fiber filter element 7. The larger impurities in the lubricating oil are intercepted by the spunlace non-woven fabric 10. During the period when the lubricating oil flows from the outside of the long fiber filter element 7 to the inside of the long fiber filter element 7, the lubricating oil flows in through the oil inlet groove 901. The lubricating oil flows from the outside of the long fiber filter element 7 to the inside of the long fiber filter element 7, forming a single unchanging filtration path. As the impurities accumulate at the edge of the spunlace non-woven fabric 10 and the outside inlet of the long fiber filter element 7, the flow rate of the lubricating oil gradually decreases, and the oil pressure in the housing 1 increases, overcoming the elastic force of the spring I 18, but failing to overcome the elastic force of the spring II 21, pushing the piston 12 toward one side of the limit slide 15. Under the limiting action of the limiting shaft 17, the piston 12 rotates relative to the inner metal mesh cylinder 5, as shown in FIG. Figure 5-Figure 6 As shown, the limiting shaft 17 is initially located at the inclined groove Ⅰ131. When the piston 12 moves toward one side of the limiting sliding plate 15, that is, after the piston 12 moves to the right, the limiting shaft 17 is located at the inclined groove Ⅱ132. Under the action of the inner inclined wall of the inclined groove Ⅱ132, the limiting tooth groove group 13 will rotate until the limiting shaft 17 is located at the connection between the inclined groove Ⅱ132 and the transverse groove 133. During this period, the piston 12 drives the passive turntable 8 and the outer metal mesh cylinder 9 to rotate together. After the outer metal mesh cylinder 9 rotates to the position of the oil inlet groove 901 relative to the spunlace non-woven fabric 10 and is misaligned with the original position, the lubrication The oil flows through the oil inlet groove 901 to the spunlace non-woven fabric 10 and the long fiber filter element 7. At this time, the position of the lubricating oil flowing to the spunlace non-woven fabric 10 and the long fiber filter element 7 changes, and the spunlace non-woven fabric 10 intercepts impurities again. The lubricating oil flowing into the long fiber filter element 7 changes its inflow position, so the path of the lubricating oil flowing from the outside of the long fiber filter element 7 to the inside of the long fiber filter element 7 is changed, and it is filtered again. Previously, impurities in the long fiber filter element 7 blocked the filtration path of the original lubricating oil, which had little effect on the flow path of the service lubricating oil, thereby avoiding the problem of impurity blockage affecting subsequent lubricating oil filtration.

[0036] After the flow of lubricating oil through the long-fiber filter element 7 is restored, the oil pressure in the housing 1 decreases, and the elastic force of the spring I 18 pushes the piston 12 to return to its original position, that is, the piston 12 moves to the left relative to the limit shaft 17, that is, the limit shaft 17 moves to the right relative to the piston 12, and the limit shaft 17 moves to the right in the transverse groove 133. At this stage, the piston 12 does not rotate until the limit shaft 17 is located at the connection point between the inclined groove I 131 and the inclined groove II 132 of the next limiting tooth groove group 13, and so on.

[0037] Even if the piston 12 has just rotated and the limit shaft 17 is still located at the inclined groove II 132, the position of the oil inlet groove 901 changes, the lubricating oil pressure in the housing 1 decreases, and the elastic force of the spring I 18 pushes the piston 12 to return to its original position. The piston 12 returns to its original position and rotates, the lubricating oil pressure in the housing 1 increases, and the piston 12 moves right again. Until the piston 12 rotates, the limit shaft 17 can be located at the connection point between the inclined groove II 132 and the transverse groove 133, so that the outer sides of the spunlace non-woven fabric 10 and the long fiber filter element 7 can serve as lubricants. The initial inlet of the oil, thereby making full use of the spunlace non-woven fabric 10 and the long fiber filter element 7 to intercept and filter impurities in the lubricating oil. When the spunlace non-woven fabric 10 and the long fiber filter element 7 are blocked and can no longer effectively filter, the pressure in the housing 1 increases, pushing the piston 12 toward the limit slide 15. The oil pressure continues to increase and overcomes the elastic force of the spring II 21. The lubricating oil pushes the piston 12 and the limit slide 15 to move together until the bypass groove 502 is opened, and the lubricating oil enters through the bypass groove 502 for pressure relief.

Claims

1. A lubricating oil purifier, comprising a housing (1), one end of the housing (1) being fixedly sleeved with an end cover I (2), an outer edge of the end cover I (2) being provided with an oil inlet hole (201), an inner edge of the end cover I (2) being fixedly sleeved with a check valve rubber sleeve (3), and an end of the check valve rubber sleeve (3) away from the end cover I (2) being fixedly sleeved with a positioning plate (4), characterized in that: The side of the positioning plate (4) away from the check valve rubber sleeve (3) is fixedly covered with an inner metal mesh tube (5), and the inner metal mesh tube (5) is provided with a plurality of groups of oil guide grooves (501) arranged at equal intervals, and the number of each group of oil guide grooves (501) is four, and each group of oil guide grooves (501) is distributed in a circular array on the inner metal mesh tube (5), and the outer side of the inner metal mesh tube (5) is provided with a long fiber filter element (7) covering all the oil guide grooves (501), and the outer side of the long fiber filter element (7) is fixedly covered with a spunlace non-woven fabric (10), and the water An outer metal mesh cylinder (9) is sleeved on the outer side of the spunlace non-woven fabric (10), and a plurality of oil inlet grooves (901) are provided on the outer metal mesh cylinder (9), and the plurality of oil inlet grooves (901) are arrayed on the outer metal mesh cylinder (9) in the form of a circular curve. Lubricating oil to be purified flows from the respective oil inlet grooves (901) on the outer metal mesh cylinder (9) to the interior of the inner metal mesh cylinder (5). When the pressure of the lubricating oil between the outer shell (1) and the outer metal mesh cylinder (9) increases, the outer metal mesh cylinder (9) rotates in one direction relative to the spunlace non-woven fabric (10); Two limiting plates (6) are fixedly mounted on the inner metal mesh cylinder (5), and the two limiting plates (6) are respectively arranged at both ends of the long fiber filter element (7); Both ends of the outer metal mesh cylinder (9) are fixedly fitted with passive turntables (8), the passive turntable (8) and the inner metal mesh cylinder (5) are connected via bearings, the passive turntable (8) is located on a side of the limiting disk (6) away from the long-fiber filter element (7), and the side surface of the passive turntable (8) is close to the side surface of the limiting disk (6) but does not contact; The outer movable sleeve of the inner metal mesh cylinder (5) is provided with a piston (12) located on one side of a passive rotary disc (8), and a limit tube (11) is fixedly provided on the side of the passive rotary disc (8) facing the piston (12). The piston (12) is provided with a tooth groove portion on a side away from the limit tube (11), and the outer diameter value of the sealing portion of the piston (12) is greater than the outer diameter value of its tooth groove portion. The outer side of the tooth groove portion of the piston (12) is provided with a plurality of connected limit tooth groove groups (13), and the limit tooth groove group (13) is composed of an inclined groove I (131), an inclined groove II (132) and a transverse groove (133), and the inclined groove I (131), the inclined groove II (132) and the transverse groove (133) are connected in sequence, and the inclined groove I (131) and the inclined groove II (132) have opposite inclination directions. The inner movable sleeve of the outer shell (1) is provided with a piston (12) on the side of the piston (12). ) side, and a spring I (18) is provided between the piston (12) and the limiting sliding disc (15), the limiting sliding disc (15), the end of the housing (1) away from the end cover I (2) is fixedly sleeved with an end cover II (20), a spring II (21) is provided between the end cover II (20) and the limiting sliding disc (15), the elastic force value of the spring II (21) on the limiting sliding disc (15) under normal setting is greater than the elastic force value of the spring I (18) on the limiting sliding disc (15), the limiting sliding disc (15) is fixedly sleeved with a limiting rod (16) on the side facing the piston (12), the limiting rod (16) is located on the inner side of the spring I (18), the end of the limiting rod (16) away from the limiting sliding disc (15) is fixedly connected to the limiting shaft (17), and the bottom end of the limiting shaft (17) is movably engaged with the limiting tooth groove group (13).

2. The lubricating oil purifier according to claim 1, characterized in that: The piston (12) and the spring I (18) are movably arranged between them.

3. The lubricating oil purifier according to claim 1, characterized in that: The length of the tooth groove portion exceeds half of the length of the sealing portion.

4. The lubricating oil purifier according to claim 1, characterized in that: The outer side of the sealing portion of the piston (12) is provided with a sealing ring that is movably sleeved and tightly fitted with the inner wall of the outer shell (1), and both ends of the inner wall of the piston (12) are provided with sealing rings that are movably sleeved and tightly fitted with the outer wall of the inner metal mesh tube (5).

5. The lubricating oil purifier according to claim 1, characterized in that: The side surface of the sealing portion of the piston (12) is fixedly connected with linkage shafts (14) having the same number as the limiting tubes (11), and each linkage shaft (14) is movably sleeved with the corresponding limiting tube (11).

6. The lubricating oil purifier according to claim 1, characterized in that: The thickness of the long fiber filter element (7) is set to 15 mm to 30 mm.

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