CN114060121B - Low-resistance integrated lubricating oil filter - Google Patents
Low-resistance integrated lubricating oil filter Download PDFInfo
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- CN114060121B CN114060121B CN202111418858.6A CN202111418858A CN114060121B CN 114060121 B CN114060121 B CN 114060121B CN 202111418858 A CN202111418858 A CN 202111418858A CN 114060121 B CN114060121 B CN 114060121B
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- lubricating oil
- oil filter
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/03—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means
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- General Engineering & Computer Science (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
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Abstract
The application relates to the field of lubricating oil systems, in particular to a low-resistance integrated lubricating oil filter, wherein a first piston rod is arranged to be of a hollow cylindrical structure, and a first spring is arranged between the first piston rod and the inner wall of a lubricating oil filter framework, so that an additional limiting structure is not required to be arranged on the first spring, the reduction of the limiting structure increases the flow area of lubricating oil in a one-way valve, the bending degree of a lubricating oil flow path is reduced, and the resistance is reduced; simultaneously with the cooperation of sliding of first piston rod and the inner wall of framework is strained to the lubricating oil, reduced axial complex guide structure, the axial space increase that check valve left like this, the slide valve forms the increase, the compression of spring also can not cause the influence to the flow area of lubricating oil simultaneously, the flow area of lubricating oil further increases, the resistance loss of lubricating oil further reduces.
Description
Technical Field
The application belongs to the field of lubricating oil systems, and particularly relates to a low-resistance integrated lubricating oil filter.
Background
An aviation gas turbine engine lubricating system is an important component of an aviation gas turbine engine and is mainly used for lubricating high-low pressure rotor fulcrum bearings, transmission gears and other parts of the engine. The lubricating oil filter is an accessory for ensuring the cleanness of a lubricating oil system, and is mainly used for filtering the lubricating oil of an engine lubricating system and removing impurities so as to ensure the normal use of the lubricating oil of the system. Because the pressure of lubricating oil supply of the aircraft engine is low, in order to ensure that the lubricating oil of the engine is normally supplied to each bearing cavity to participate in lubrication and heat exchange, the resistance of lubricating oil accessories and pipelines on a lubricating oil supply way needs to be as low as possible.
As shown in fig. 1-4, a check valve 2, a bypass valve 3, and a lubricating oil filter framework 4 are usually designed for the oil filter of the current domestic engine lubricating oil system, and include a coil spring, a self-sealing valve, an oil filter core 22, an oil filter cover, a long screw, a self-locking nut, an elastic collar for a shaft, and an oil filter differential pressure sensor mounting seat, etc., and the structural schematic diagram is shown in fig. 1. When the lubricating oil filter normally works, lubricating oil flows out of the lubricating oil filter after sequentially passing through the lubricating oil filter element, the lubricating oil filter framework 4 and the one-way valve 2 from the inlet; when the surface impurities of the lubricating oil filter element are too much and the lubricating oil can not pass through, the bypass valve 3 is opened, and the lubricating oil flows out of the lubricating oil filter after passing through the one-way valve 2 from the inlet.
Due to the structural space limitation, the one-way valve 2, the bypass valve 3 and the lubricating oil filtering framework 4 are the main throttling positions of the lubricating oil filter, and the two valves and the lubricating oil filtering framework 4 are small in flow area, and the outlet flow path corner of the one-way valve 2 is large, so that the resistance loss is large. The large resistance loss increases the working pressure of the oil pump set, and the power loss of the engine is increased along with the increase of the working pressure.
Therefore, how to reduce the resistance loss of the check valve 2 and improve the engine performance is a problem to be solved.
Disclosure of Invention
The application aims to provide a low-resistance integrated lubricating oil filter to solve the problem that the resistance loss of a unidirectional valve in the existing oil filter is large.
The technical scheme of the application is as follows: a low resistance integrated lubricating oil filter comprises a shell provided with an inlet and an outlet; the oil filter element, the one-way valve, the bypass valve and the lubricating oil filter framework are arranged in the shell; the one-way valve is arranged in the lubricating oil filter framework and is connected with an outlet of the shell, a first waist-shaped hole for lubricating oil circulation is formed in the lubricating oil filter framework, the one-way valve comprises a first piston rod, a first spring and a sealing plate, the first piston rod is of a hollow cylindrical structure, two ends of the first piston rod are provided with sliding rings in sliding fit with the inner wall of the lubricating oil filter framework, annular mounting grooves are formed among the first piston rod, the sliding rings and the inner wall of the lubricating oil filter framework, the first spring is arranged in the mounting grooves, two ends of the first spring are connected with the sliding rings, and the side wall of the first spring is attached to the inner wall of the lubricating oil filter framework; the shrouding includes connecting portion and closing part, connecting portion connect between first piston rod and closing part, the closing part is the cylinder structure and has the clearance between closing part side direction and the lubricating oil filter skeleton, has the clearance between terminal surface and the first piston rod terminal surface.
Preferably, the check valve is arranged in a flow passage of the lubricating oil filter framework, and the inner wall surface of the lubricating oil flow passage at the outlet of the lubricating oil filter framework is a cylindrical surface.
Preferably, the position department that the sealing corresponds the export of framework is strained to the lubricating oil is equipped with annular closed ring, framework is strained to the lubricating oil's export terminal surface is equipped with the annular first snap ring of ring that can seal the complex with closed ring.
Preferably, the maximum distance between the closed part and the outlet end face of the lubricating oil filter framework is 6mm.
Preferably, the waist-shaped hole on the lubricating oil filter skeleton extends from the lower part of the lubricating oil filter skeleton to the middle part and the upper part of the lubricating oil filter skeleton.
Preferably, the connecting portion is long and is disposed on one side of the first piston rod along an axial direction of the oil filter frame.
Preferably, the bypass valve includes second piston rod and second spring, and the top of second piston rod is towards the lubricating oil incoming flow direction and the inner wall of skeleton is strained to the second piston rod and lubricating oil cooperation of sliding, the second spring housing establish with the lubricating oil strain between skeleton and the second piston rod, the lubricating oil strain the skeleton correspond on the lateral wall in the bypass valve outside set up with external intercommunication second waist type hole.
Preferably, one end of the second piston rod, which is close to the outlet, is provided with a sliding ring, and the sliding ring is in sliding fit with the inner wall of the lubricating oil filter framework.
Preferably, an annular second snap ring is arranged on the end face corresponding to the incoming flow direction of the lubricating oil of the bypass valve, and an annular snap groove is formed in the position, corresponding to the second snap groove, of the second piston rod; when the bypass valve is closed, the second clamping ring is in clamping fit with the annular clamping groove.
According to the low-resistance integrated lubricating oil filter, the first piston rod is arranged to be of the hollow cylindrical structure, and the first spring is arranged between the first piston rod and the inner wall of the lubricating oil filter framework, so that an additional limiting structure is not required to be arranged on the first spring, the flow area of lubricating oil in a one-way valve is increased due to the reduction of the limiting structure, the bending degree of a lubricating oil flow path is reduced, and the resistance is reduced; meanwhile, the first piston rod is in sliding fit with the inner wall of the lubricating oil filter framework, so that the guide structure in axial fit is reduced, the axial space reserved by the one-way valve is increased, the stroke of the sliding valve is increased, meanwhile, the compression of the spring cannot influence the flow area of the lubricating oil, the flow area of the lubricating oil is further increased, and the resistance loss of the lubricating oil is further reduced.
Drawings
In order to more clearly illustrate the technical solutions provided in the present application, the drawings will be briefly described below. It is to be understood that the drawings described below are merely exemplary of some embodiments of the application.
FIG. 1 is a schematic diagram of an overall structure in the background art;
FIG. 2 is a schematic structural diagram of a lubricating oil filter frame, a check valve and a bypass valve in the background art;
FIG. 3 is a schematic view of a check valve in the background art;
FIG. 4 is a schematic diagram of a bypass valve in the prior art;
FIG. 5 is a schematic view of the overall flow structure of the lubricant when the check valve is opened according to the present application;
FIG. 6 is a schematic structural view of the check valve of the present application;
FIG. 7 is a schematic structural view of a lubricating oil filter frame, a check valve and a bypass valve in the present application;
FIG. 8 is a schematic view of the overall flow of oil with the bypass flapper open according to the present application;
fig. 9 is a schematic view of the bypass shutter structure according to the present application.
1. A housing; 2. a check valve; 3. a bypass valve; 4. a lubricating oil filter framework; 5. a first chamber; 6. a second chamber; 7. a first piston rod; 8. a first spring; 9. closing the plate; 10. a connecting portion; 11. a closing part; 12. a closed ring; 13. a first snap ring; 14. a slip ring; 15. a second piston rod; 16. a second spring; 17. a first kidney-shaped hole; 18. a second kidney-shaped hole; 19. a slip ring; 20. a second snap ring; 21. an annular neck; 22. an oil filter element.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application.
A low resistance integrated lubricating oil filter is shown in figures 5-7 and comprises a shell 1, an oil filter element 22, a check valve 2, a bypass valve 3 and a lubricating oil filter framework 4. Be equipped with the inner chamber that holds the piece of straining in the shell 1, the inner chamber is all located to oil filter core 22, check valve 2, bypass valve 3 and lubricating oil filter skeleton 4, and the lubricating oil import has been seted up at the middle part of shell 1, and the lubricating oil export has been seted up at the top of shell 1. The oil filter core 22 is along the coaxial setting of the central line of shell 1, inside the frame 4 is strained to the lubricating oil to the coaxial setting of frame 4, the top of frame 4 is strained to the lubricating oil is equipped with first cavity 5 and second cavity 6 (combination figure 9), check valve 2 is located in first cavity 5 and is linked to each other with the export, bypass valve 3 is located in the second cavity 6 and is linked to each other with the export, offer the first waist type hole 17 that is used for the lubricating oil circulation on the frame 4 is strained to the lubricating oil.
As can be seen from the structural analysis of the check valve 2, in order to ensure that the piston of the first check valve 2 can stably run along the axial direction, a guide structure is arranged in the first chamber 5, and the arrangement of the guide structure increases the axial length of the check valve 2; meanwhile, in order to guarantee the performance of the spring, the inner side and the outer side of the piston corresponding to the spring are provided with limiting structures, so that the spring is prevented from deviating, lubricating oil can only flow out from the position between the first spring 8 and the guide structure after reaching the one-way valve 2, the radial space of the one-way valve 2 is reduced due to the fact that the limiting structures are added, and the flow channel of the lubricating oil is more tortuous.
Based on the above analysis, the specific improvements are as follows:
the one-way valve 2 comprises a first piston rod 7, a first spring 8 and a sealing plate 9, the first piston rod 7 is of a hollow cylindrical structure, two ends of the first piston rod 7 are provided with sliding rings 19 which are in sliding fit with the inner wall of the lubricating oil filter framework 4, an annular mounting groove is formed among the first piston rod 7, the sliding rings 19 and the inner wall of the lubricating oil filter framework 4, the first spring 8 is arranged in the mounting groove, two ends of the first spring 8 are connected with the sliding rings 19, and the side wall of the first spring 8 is attached to the inner wall of the lubricating oil filter framework 4;
the closing plate 9 includes a connecting portion 10 and a sealing portion 11, the connecting portion 10 is connected between the first piston rod 7 and the sealing portion 11, the sealing portion 11 is of a cylindrical structure, a gap is formed between the lateral side of the sealing portion 11 and the lubricating oil filter framework 4, and a gap is formed between the end face of the sealing portion and the end face of the first piston rod 7.
Through setting first piston rod 7 to the hollow circular cylinder structure, first spring 8 sets up between the inner wall of first piston rod 7 and first cavity 5, first spring 8 spacing is accomplished by the inner wall of first cavity 5 and the outer wall of first piston rod 7, and not only spacing ability is better, has got rid of original limit structure simultaneously, and the space of leaving for the lubricating oil flow like this is bigger, and the flow path of lubricating oil is more level and smooth, and the resistance loss of buckling that flows is littleer, and the flow of lubricating oil is more smooth and easy.
Meanwhile, the first piston rod 7 is in sliding fit with the inner wall of the first chamber 5 to achieve guiding, a guiding structure does not need to be additionally arranged, the axial space of the one-way valve 2 is increased, the stroke of the sliding valve is increased, the inlet of the one-way valve 2 is larger, and the flowing smoothness of lubricating oil is further improved.
As shown in fig. 5, 7 and 8, when the check valve 2 is opened, the lubricating oil flows out from the outlet of the lubricating oil filter framework 4, bypasses the closing part 11 and then enters the inside of the first piston rod 7, the inside of the first piston rod 7 is a simple cavity, the lubricating oil flows smoothly and then flows out from the outlet of the housing, and the lubricating oil does not need to pass through the first spring 8 in the process, so that the flow area of the lubricating oil is not influenced when the first spring 8 is compressed, and the flow resistance of the check valve 2 is effectively reduced; when the surface impurities of the oil filter element 22 are too much and the lubricating oil cannot pass through, the bypass valve 3 is opened, and the lubricating oil flows out of the lubricating oil filter after passing through the one-way valve 2 from the inlet.
Analyzing the structure of check valve 2 and bypass valve 3 can know, because check valve 2 sets up side by side with bypass valve 3, in order to adapt to the position of first chamber 5, the exit of skeleton 4 is strained to the lubricating oil is equipped with the structure of buckling, and the lubricating oil has certain resistance loss when advancing first chamber 5 and flowing out from check valve 2 like this.
Preferably, the check valve 2 is arranged in a flow passage of the lubricating oil filter framework 4, and the inner wall surface of the lubricating oil flow passage at the outlet of the lubricating oil filter framework 4 is a cylindrical surface.
Through locating in the framework 4 is strained to the lubricating oil to one-way valve 2, changed the structure side by side of one-way valve 2 with bypass valve 3, consequently the internal face of the lubricating oil runner in framework 4 exit is strained to the lubricating oil can design into the cylindrical surface, and smooth outflow in the export of framework 4 is strained to the lubricating oil can be followed to the lubricating oil.
The inner diameter of the first chamber 5 after moving downwards is the same as the original diameter, in order to adapt to the downward movement of the one-way valve 2, the wall thickness of the first chamber 5 is properly thinned, and because a guide structure is not needed to be arranged, the first piston rod 7 is guided by the inner wall of the first chamber 5, and the thinning of the wall thickness of the first chamber 5 does not influence the performance of the one-way valve 2.
Preferably, a circular ring-shaped closed ring 12 is arranged at a position of the closed part 11 corresponding to the outlet of the lubricating oil filter framework 4, and a circular ring-shaped first snap ring 13 which can be in sealing fit with the closed ring 12 is arranged on the end face of the outlet of the lubricating oil filter framework 4. When the check valve 2 is closed, the closing ring 12 and the first clamping ring 13 can be stably clamped, and the sealing performance of the check valve 2 is guaranteed.
Preferably, the maximum distance between the closing part 11 and the outlet end face of the oil filter frame 4 is 6mm, that is, the stroke of the slide valve is 6mm, and the flow of the oil when the check valve 2 is opened is smoother compared to the conventional stroke of the slide valve of 5 mm.
Preferably, the waist-shaped hole on the lubricating oil filter framework 4 extends to the middle part and the upper part of the lubricating oil filter framework 4 from the lower part of the lubricating oil filter framework 4, namely the flow area of the waist-shaped hole is larger, the flow of the lubricating oil filter framework 4 is increased, and the increase of the flow of the lubricating oil filter framework 4 can be adapted due to the increase of the flow area of the one-way valve 2, so that the flow of the whole lubricating oil filter is increased, and meanwhile, the increase of the waist-shaped hole has a certain weight reduction effect.
Preferably, the connecting portion 10 is long and is disposed on one side of the first piston rod 7 along the axial direction of the oil filter frame 4, so that the connecting portion 10 occupies a small space, and the sealing portion 11 can be stably sealed while occupying a circulation channel of oil as little as possible.
As shown in fig. 5 and 9, preferably, the bypass valve 3 includes a second piston rod 15 and a second spring 16, the top of the second piston rod 15 faces the incoming flow direction of the lubricant, the second piston rod 15 is in sliding fit with the inner wall of the lubricant filter framework 4, the second spring 16 is sleeved between the lubricant filter framework 4 and the second piston rod 15, and a second kidney-shaped hole 18 communicated with the outside is formed in the side wall of the lubricant filter framework 4 corresponding to the outside of the bypass valve 3.
Through comparing second piston rod 15 in current reverse arrangement and with the cooperation of sliding of second chamber 6, second spring 16 can obtain effectual fixed under second piston rod 15's is spacing simultaneously, the structure that bypass valve 3 need carry out the direction has been reduced, the space that guide structure occupy reduces, make the flow area increase of lubricating oil, set up second waist type hole 18 on the lateral wall of second chamber 6 simultaneously, the lubricating oil that reaches bypass valve 3 department can continue to flow more smoothly along original axial direction, also can flow from the side direction along second waist type hole 18, the export flow area increase of bypass valve 3, the outflow of lubricating oil is more smooth and easy.
Preferably, one end of the second piston rod 15 close to the outlet is provided with a sliding ring 14, and the sliding ring 14 is in sliding fit with the inner wall of the oil filter framework 4, so that the fit is stable.
Preferably, a circular second snap ring 20 is arranged on the end face corresponding to the incoming flow direction of the lubricating oil of the bypass valve 3, and an annular snap groove 21 is formed in the position of the second piston rod 15 corresponding to the second snap groove; when the bypass valve 3 is closed, the second clamping ring 20 is in clamping fit with the annular clamping groove 21. When the bypass valve 3 is closed, the second clamping groove is matched with the second clamping ring 20 in a clamping mode, and the closure of the bypass valve 3 is guaranteed.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (9)
1. A low resistance integrated lubricating oil filter comprises a shell (1) provided with an inlet and an outlet; the oil filter element (22), the one-way valve (2), the bypass valve (3) and the lubricating oil filter framework (4) are arranged in the shell (1); check valve (2) are located in lubricating oil strain skeleton (4) and its export with shell (1) links to each other, offer first waist type hole (17) that are used for the lubricating oil circulation on lubricating oil strain skeleton (4), its characterized in that:
the one-way valve (2) comprises a first piston rod (7), a first spring (8) and a sealing plate (9), the first piston rod (7) is of a hollow cylindrical structure, two ends of the first piston rod (7) are provided with a sliding ring (19) which is in sliding fit with the inner wall of the lubricating oil filter framework (4), an annular mounting groove is formed among the first piston rod (7), the sliding ring (19) and the inner wall of the lubricating oil filter framework (4), the first spring (8) is arranged in the mounting groove, two ends of the first spring (8) are connected with the sliding ring (19), and the side wall of the first spring (8) is attached to the inner wall of the lubricating oil filter framework (4);
shrouding (9) are including connecting portion (10) and closing part (11), connecting portion (10) are connected between first piston rod (7) and closing part (11), closing part (11) are the cylinder structure and closing part (11) side and lubricating oil strain and have clearance, terminal surface and first piston rod (7) between the skeleton (4) and have the clearance between the terminal surface.
2. The low drag integrated oil filter of claim 1 wherein: the check valve (2) is arranged in a flow passage of the lubricating oil filter framework (4), and the inner wall surface of the lubricating oil flow passage at the outlet of the lubricating oil filter framework (4) is a cylindrical surface.
3. The low drag integrated oil filter of claim 2 wherein: the position department that sealing portion (11) correspond the export of lubricating oil filter skeleton (4) is equipped with annular closed ring (12), the export terminal surface of lubricating oil filter skeleton (4) is equipped with can be with the annular first snap ring (13) of closed ring (12) seal complex ring.
4. The low drag integrated oil filter of claim 2 wherein: the maximum distance between the closed part (11) and the outlet end face of the lubricating oil filter framework (4) is 6mm.
5. The low drag integrated oil filter of claim 1 wherein: waist type hole on the framework (4) is strained to the lubricating oil by the lower part of framework (4) is strained to the lubricating oil middle part and the upper portion of framework (4) are strained.
6. The low drag integrated oil filter of claim 1 wherein: the connecting portion (10) is long and arranged on one side of the first piston rod (7) along the axis direction of the lubricating oil filter framework (4).
7. The low drag integrated oil filter of claim 2 wherein: bypass valve (3) include second piston rod (15) and second spring (16), the top of second piston rod (15) is towards the lubricating oil direction of flow and the cooperation of sliding of the inner wall of skeleton (4) is strained with the lubricating oil in second piston rod (15), between skeleton (4) and second piston rod (15) are strained to the lubricating oil to second spring (16) cover is located, skeleton (4) are strained to the lubricating oil is seted up on the lateral wall that corresponds bypass valve (3) outside with external intercommunication second waist type hole (18).
8. The low drag integrated oil filter of claim 7 wherein: one end of the second piston rod (15) close to the outlet is provided with a sliding ring (14), and the sliding ring (14) is in sliding fit with the inner wall of the lubricating oil filter framework (4).
9. The low drag integrated oil filter of claim 7 wherein: a second annular snap ring (20) is arranged on the end face, corresponding to the incoming flow direction of the lubricating oil, of the bypass valve (3), and an annular snap groove (21) is formed in the position, corresponding to the second snap groove, of the second piston rod (15); when the bypass valve (3) is closed, the second clamping ring (20) is in clamping fit with the annular clamping groove (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111418858.6A CN114060121B (en) | 2021-11-24 | 2021-11-24 | Low-resistance integrated lubricating oil filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111418858.6A CN114060121B (en) | 2021-11-24 | 2021-11-24 | Low-resistance integrated lubricating oil filter |
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| Publication Number | Publication Date |
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| CN114060121A CN114060121A (en) | 2022-02-18 |
| CN114060121B true CN114060121B (en) | 2022-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111418858.6A Active CN114060121B (en) | 2021-11-24 | 2021-11-24 | Low-resistance integrated lubricating oil filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB561122A (en) * | 1941-11-29 | 1944-05-05 | Aerotransp Ab | Improvements in viscosity regulators |
| CN103470339A (en) * | 2013-09-03 | 2013-12-25 | 中国航空工业集团公司沈阳发动机设计研究所 | Integrated oil filter |
| CN103790711A (en) * | 2014-01-15 | 2014-05-14 | 哈尔滨东安发动机（集团）有限公司 | Lubricating oil distribution device |
| CN104196592A (en) * | 2014-08-29 | 2014-12-10 | 哈尔滨东安发动机（集团）有限公司 | Filtering device |
| CN108071926A (en) * | 2017-11-29 | 2018-05-25 | 中国直升机设计研究所 | A kind of master subtracts oil cooler bypass flap |
| CN112050069A (en) * | 2020-08-28 | 2020-12-08 | 中国航发贵阳发动机设计研究所 | Lubricating oil return filter with one-way valve |
| CN112403071A (en) * | 2020-10-30 | 2021-02-26 | 中国航发西安动力控制科技有限公司 | Assembly integrating safety valve and oil filter |
| JP2021116796A (en) * | 2020-01-29 | 2021-08-10 | 本田技研工業株式会社 | Oil filter and lubrication structure |
-
2021
- 2021-11-24 CN CN202111418858.6A patent/CN114060121B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB561122A (en) * | 1941-11-29 | 1944-05-05 | Aerotransp Ab | Improvements in viscosity regulators |
| CN103470339A (en) * | 2013-09-03 | 2013-12-25 | 中国航空工业集团公司沈阳发动机设计研究所 | Integrated oil filter |
| CN103790711A (en) * | 2014-01-15 | 2014-05-14 | 哈尔滨东安发动机（集团）有限公司 | Lubricating oil distribution device |
| CN104196592A (en) * | 2014-08-29 | 2014-12-10 | 哈尔滨东安发动机（集团）有限公司 | Filtering device |
| CN108071926A (en) * | 2017-11-29 | 2018-05-25 | 中国直升机设计研究所 | A kind of master subtracts oil cooler bypass flap |
| JP2021116796A (en) * | 2020-01-29 | 2021-08-10 | 本田技研工業株式会社 | Oil filter and lubrication structure |
| CN112050069A (en) * | 2020-08-28 | 2020-12-08 | 中国航发贵阳发动机设计研究所 | Lubricating oil return filter with one-way valve |
| CN112403071A (en) * | 2020-10-30 | 2021-02-26 | 中国航发西安动力控制科技有限公司 | Assembly integrating safety valve and oil filter |
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| CN114060121A (en) | 2022-02-18 |
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