An engine oil filter end cap protection device

Abstract

This utility model relates to the field of LEAP-1A engine oil filter end cap protection technology, and discloses an engine oil filter end cap protection device, which includes an end cap body, a protective bracket, a bolt assembly, and a set screw assembly; the end cap body is located below the lubrication assembly, and a plurality of bolt holes are evenly arranged circumferentially on the outer periphery of the end cap body; the protective bracket is located below the end cap body and is detachably connected to the end cap body. The protective bracket includes a first plate arranged in the horizontal direction and a second plate arranged in the vertical direction. The second plate is located on one side of the first plate and connected to the first plate. A first through hole is opened at both ends of the first plate, and two adjacent first through holes are corresponding to the bolt holes; the bolt assembly is located on the protective bracket and is inserted into the first through hole and the second through hole respectively. A second through hole is opened on the second plate; the set screw assembly is used to restrict the downward movement of the end cap body in the vertical direction.

Description

Technical Field

[0001] This utility model relates to the field of LEAP-1A engine oil filter end cap protection technology, and in particular to an engine oil filter end cap protection device. Background Technology

[0002] Oil leakage is a common type of failure in the operation of aircraft engines, affecting not only equipment performance and lifespan but also potentially causing serious safety hazards. Loosening of the engine end cover bushing is a significant cause of oil leakage. As a key component connecting the engine end cover to the housing, the tightness of the bushing directly affects the sealing of the oil system. If the bushing becomes loose, oil will leak from the connection, causing a safety accident.

[0003] Currently, traditional aircraft engine end caps are mostly fixed with wire threaded sleeves. The wire threaded sleeves are made of relatively hard stainless steel, while the internal threads of the housing are relatively soft and easily damaged. Therefore, there is a risk of the wire threaded sleeves coming loose, which can cause the oil filter end cap to loosen, leading to a large amount of oil leakage. This can trigger a low oil pressure warning in the air and cause an in-flight engine shutdown. In order to ensure the safety of aircraft engines, we must conduct in-depth research and improvement on this traditional fixing method and find a more reliable and safe end cap fixing device. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the traditional aircraft engine end cover with wire thread sleeve has the risk of coming loose, which can cause the oil filter end cover to loosen, resulting in a large amount of oil leakage and affecting the safe operation of the aircraft engine.

[0005] To address the aforementioned technical problems, this utility model provides an engine oil filter end cap protection device, comprising an end cap body, a protective bracket, a bolt assembly, and a set screw assembly. The end cap body is disposed below the engine, and a plurality of bolt holes are evenly arranged circumferentially around its outer periphery. The protective bracket is disposed below the end cap body and is detachably connected to the end cap body. The protective bracket includes a first plate arranged horizontally and a second plate arranged vertically. The second plate is disposed on one side of the first plate and connected to the first plate. First through holes are respectively opened at both ends of the first plate, and two adjacent first through holes are corresponding to the bolt holes. A second through hole is opened on the second plate. The bolt assembly is disposed on the protective bracket and is respectively inserted into the first and second through holes to fix the protective bracket and the end cap body. The set screw assembly is disposed on the protective bracket and is used to restrict the downward movement of the end cap body in the vertical direction.

[0006] Furthermore, there are four bolt holes.

[0007] In one embodiment, the first plate includes a connecting portion and two symmetrically arranged extension portions, which are respectively disposed at both ends of the connecting portion and arranged at an angle, and a first through hole is disposed at the end of the extension portion away from the connecting portion.

[0008] In one embodiment, the bolt assembly includes a first bolt member, the number of which is the same as the number of connecting parts. The first bolt member is located on one side of the first through hole and is sequentially inserted into the first through hole and the bolt hole. The first bolt member is used to fix the protective bracket and the end cap body.

[0009] In one embodiment, the bolt assembly further includes a second bolt member disposed on one side of the second through hole. The engine housing has a connecting hole corresponding to the second through hole. The second bolt member is inserted into the second through hole and the connecting hole in sequence. The second bolt member is used to reinforce the protective bracket.

[0010] In one embodiment, the set screw assembly includes a head, a rod portion, and an end portion. The rod portion passes through the first plate in a vertical direction, the head is located at one end of the rod portion and is connected to the end cap body, and the end portion is located at the other end of the rod portion.

[0011] In one embodiment, a support portion is provided at one end of the head near the end cap body. The support portion is connected to the end cap body, and the outer diameter of the support portion is larger than the outer diameter of the head to increase the contact area between the set screw assembly and the end cap body.

[0012] In one embodiment, the outer wall of the rod body is provided with an internal thread, and the inner wall of the end is provided with an external thread adapted to the internal thread. The end is threadedly connected to the rod body to restrict the downward movement of the rod body in the vertical direction.

[0013] In one embodiment, the end cover body has a shaft hole at its center for releasing residual oil inside the engine. The end cover body also includes a plug, which is inserted into the shaft hole to seal it.

[0014] In one embodiment, a sealing ring is provided at one end of the plug near the shaft hole to prevent oil from flowing out of the shaft hole.

[0015] In one embodiment, the protective bracket is made of aluminum alloy.

[0016] Furthermore, the protective bracket is made of 7175 aluminum alloy.

[0017] Compared with the prior art, the beneficial effects of this embodiment of the engine oil filter end cap protection device are as follows: The bolt holes evenly distributed around the outer circumference of the end cap body and the corresponding first through holes on the protective bracket achieve uniform tightening using a bolt assembly, ensuring uniform force on the sealing surface between the end cap and the engine body, reducing the risk of seal failure due to uneven local force. The protective bracket consists of a horizontal first plate and a vertical second plate, forming a stable support structure, which helps maintain the stability of the end cap during operation and avoids changes in the sealing gap caused by vibration or deformation. The set screw assembly is located at the center of the protective bracket, restricting the vertical movement of the end cap body and preventing the end cap from shifting due to vibration or external force during engine operation, thus avoiding oil leakage caused by misalignment of the sealing surface. The bolt assembly achieves vertical tightening, and the set screw assembly provides vertical constraint, forming a three-dimensional protection system that comprehensively suppresses end cap displacement. This effectively avoids the potential for detachment of the traditional aero-engine end cap and steel threaded sleeve, which could lead to loosening of the oil filter end cap, causing a large amount of oil leakage and affecting the safe operation of the aero-engine. Attached Figure Description

[0018] Figure 1 This is an exploded view of the engine oil filter end cap protection device according to an embodiment of this utility model.

[0019] Figure 2 This is a top view of the protective bracket in the engine oil filter end cover protection device according to an embodiment of this utility model.

[0020] Figure 3 This is a front view of the protective bracket in the engine oil filter end cap protection device according to an embodiment of this utility model.

[0021] Figure 4 This is a schematic diagram of an engine oil filter end cap protection device and an engine according to an embodiment of this utility model.

[0022] In the diagram, 10 is the end cap body; 11 is the bolt hole; 12 is the shaft hole; 13 is the plug; and 14 is the sealing ring.

[0023] 20. Protective bracket; 21. First plate; 211. Connecting part; 212. Extension part; 22. First through hole; 23. Second plate; 24. Second through hole;

[0024] 30. Bolt assembly; 31. First bolt assembly; 32. Second bolt assembly;

[0025] 40. Set screw assembly; 41. Head; 42. Rod body; 43. End; 44. Support. Detailed Implementation

[0026] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0027] In the description of this utility model, it should be understood that when an element is referred to as "fixed to" or "set on" another element, it can be directly on or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to or indirectly connected to the other element. The terms "mounted," "connected," and "attached" should be interpreted broadly, for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0028] In the description of this utility model, it should be understood that the terms "height," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0030] like Figures 1 to 4As shown, this utility model preferably provides an engine oil filter end cap protection device, which includes an end cap body 10, a protective bracket 20, a bolt assembly 30, and a set screw assembly 40; the end cap body 10 is disposed below the engine, and a plurality of bolt holes 11 are evenly arranged circumferentially on the outer periphery of the end cap body 10; the protective bracket 20 is disposed below the end cap body 10, and the protective bracket 20 is detachably connected to the end cap body 10. The protective bracket 20 includes a first plate 21 arranged in the horizontal direction and a second plate 23 arranged in the vertical direction. The second plate 23 is provided with... The first plate 21 is placed on one side and connected to the first plate 21. The first plate 21 has first through holes 22 at both ends. Two adjacent first through holes 22 are corresponding to bolt holes 11. The second plate 23 has second through holes 24. The bolt assembly 30 is placed on the protective bracket 20. The bolt assembly 30 is inserted into the first through holes 22 and the second through holes 24 to fix the protective bracket 20 and the end cap body 10. The set screw assembly 40 is placed on the protective bracket 20. The set screw assembly 40 is used to restrict the downward movement of the end cap body 10 in the vertical direction.

[0031] Based on the above technical features, this utility model embodiment uses bolt holes 11 evenly distributed around the outer periphery of the end cover body 10 and corresponding first through holes 22 on the protective bracket 20 to achieve uniform fastening using bolt assembly 30. This ensures uniform force on the sealing surface between the end cover and the engine body, reducing the risk of seal failure due to uneven local force. The protective bracket 20 is composed of a horizontal first plate 21 and a vertical second plate 23, forming a stable support structure that helps maintain the stability of the end cover during operation and avoids changes in the sealing gap caused by vibration or deformation. The set screw assembly 40 is located at the center of the protective bracket 20. By restricting the vertical movement of the end cover body 10, it prevents the end cover from shifting due to vibration or external force during engine operation, avoiding oil leakage caused by misalignment of the sealing surface. The bolt assembly 30 achieves vertical fastening, and the set screw assembly 40 provides vertical constraint, forming a three-dimensional protection system that comprehensively suppresses end cover displacement. This effectively avoids the potential for detachment of the traditional aero-engine end cover and steel threaded sleeve, which could lead to loosening of the lubricating oil filter end cover, causing a large amount of lubricating oil leakage and affecting the safe operation of the aero-engine.

[0032] As some embodiments of this utility model, such as Figure 2As shown, the first plate 21 includes a connecting portion 211 and two symmetrically arranged extension portions 212. The extension portions 212 are respectively disposed at both ends of the connecting portion 211 and are arranged at an included angle. The first through hole 22 is disposed at the end 43 of the extension portion 212 away from the connecting portion 211. The included angle arrangement allows the first plate 21 to better distribute stress when subjected to force, enhancing the overall stability of the structure. This layout helps to resist vibrations and impacts generated during engine operation and reduces the risk of seal failure or component damage due to structural deformation. The design of the first plate 21 simplifies the installation and maintenance process. Due to its symmetrical structure and reasonable layout, operators can more easily access and operate the bolt assembly 30 and the set screw assembly 40, thereby improving work efficiency and safety.

[0033] As some embodiments of this utility model, such as Figure 1 As shown, the bolt assembly 30 includes first bolt members 31, the number of which is the same as the number of connecting parts 211. The first bolt members 31 are located on one side of the first through hole 22 and are sequentially inserted into the first through hole 22 and bolt holes 11. The first bolt members 31 are used to fix the protective bracket 20 and the end cap body 10. The number of first bolt members 31 is the same as the number of connecting parts 211, and their location on one side of the first through hole 22 ensures that each connecting part 211 can be accurately positioned and fixed to the end cap body 10 via the corresponding first bolt member 31. This helps maintain the relative positional stability between the protective bracket 20 and the end cap body 10, reducing sealing or structural problems caused by installation deviations. The first bolt members 31, sequentially inserted into the first through hole 22 and bolt holes 11, form a direct mechanical connection, which provides high strength and stability.

[0034] As some embodiments of this utility model, such as Figure 1 As shown, the bolt assembly 30 also includes a second bolt member 32, which is disposed on one side of the second through hole 24. A connecting hole corresponding to the second through hole 24 is provided on the engine housing. The second bolt member 32 is sequentially inserted into the second through hole 24 and the connecting hole, and is used to reinforce the protective bracket 20. The second bolt member 32 forms a rigid connection through the second through hole 24 of the protective bracket 20 and the connecting hole of the engine housing. This design directly anchors the protective bracket 20 to the engine housing, significantly reducing the risk of bracket displacement caused by horizontal or vertical vibration.

[0035] As some embodiments of this utility model, such as Figure 3As shown, the set screw assembly 40 includes a head 41, a rod 42, and an end 43. The rod 42 passes vertically through the first plate 21. The head 41 is located at one end of the rod 42 and connected to the end cap body 10. The end 43 is located at the other end of the rod 42. The rod 42 passes vertically through the first plate 21, and the head 41 is directly connected to the end cap body 10, forming a physical limit. When the engine is running, the set screw assembly 40 effectively resists the vertical displacement of the end cap caused by vibration or external force through the rigid contact between the rod 42 and the first plate 21, ensuring that the sealing surface of the end cap body 10 is always aligned with the engine housing. The independent vertical limiting function of the set screw assembly 40 can reduce the risk of bolt loosening due to long-term stress, avoid end cap displacement caused by a decrease in bolt preload, and prevent oil leakage from the end cap body 10 due to the wire thread sleeve falling off.

[0036] As some embodiments of this utility model, such as Figure 3 As shown, a support portion 44 is provided at one end of the head 41 near the end cap body 10. The support portion 44 is connected to the end cap body 10, and the outer diameter of the support portion 44 is larger than the outer diameter of the head 41 to increase the contact area between the set screw assembly 40 and the end cap body 10. Through the design of the support portion 44, with its outer diameter larger than that of the head 41, the contact area between the set screw assembly 40 and the end cap body 10 is significantly increased. This design more evenly distributes the horizontal force or vibration impact received by the end cap body 10 to the surface of the support portion 44, avoiding deformation or loosening of the end cap body 10 due to localized stress concentration.

[0037] As some embodiments of this utility model, such as Figure 3 As shown, the outer wall of the rod body 42 is provided with an internal thread, and the inner wall of the end 43 is provided with an external thread that matches the internal thread. The end 43 is threadedly connected to the rod body 42 to limit the downward movement of the rod body 42 in the vertical direction. The internal thread on the outer wall of the rod body 42 and the external thread on the inner wall of the end 43 form a rigid connection through threaded engagement, directly limiting the vertical displacement of the rod body 42. Even if the engine is running for a long time or in a vibrating environment, the rod body 42 will not slip due to external force or thermal expansion, ensuring that the set screw assembly 40 always maintains its vertical limiting function on the end cover body 10. The threaded connection between the end 43 and the rod body 42 achieves a "self-locking" vertical limit, eliminating the need for additional locking components.

[0038] As some embodiments of this utility model, such as Figure 1As shown, the end cap body 10 has a shaft hole 12 at its center, which is used to release residual oil from inside the engine. The end cap body 10 also includes a plug 13, which is inserted into the shaft hole 12 to seal it. The shaft hole 12 at the center of the end cap body 10 provides a dedicated drainage channel for residual oil inside the engine. When the engine is stopped or under maintenance, the oil can be naturally drained through the shaft hole 12, preventing oil from accumulating in the end cap or inside the engine and reducing the risk of component damage due to oil corrosion or contamination. The plug 13 is inserted into and seals the shaft hole 12 when it is not draining, preventing oil from leaking into the external environment through the shaft hole 12 when the engine is running. This design ensures the availability of the draining function while avoiding the risk of leakage during operation, achieving precise control of "draining on demand".

[0039] As some embodiments of this utility model, such as Figure 1 As shown, a sealing ring 14 is provided at the end of the plug 13 near the shaft hole 12. The sealing ring 14 is used to prevent oil from flowing out of the shaft hole 12. The sealing ring 14 forms an additional sealing layer between the plug 13 and the shaft hole 12, which, together with the plug 13's own insert-type seal, achieves a "double sealing" effect. Even if the plug 13 becomes slightly loose due to long-term use or vibration, the sealing ring 14 can still reliably prevent oil leakage, ensuring the efficient operation of the engine's internal oil system.

[0040] As some embodiments of this utility model, such as Figure 1 As shown, the protective bracket 20 is made of aluminum alloy. A dense aluminum oxide film naturally forms on the surface of the aluminum alloy, which can effectively isolate air, moisture and corrosive media, prevent the metal substrate from being corroded, making the protective bracket 20 highly corrosion resistant and extending its service life.

[0041] Furthermore, the protective bracket 20 is made of 7175 aluminum alloy. 7175 aluminum alloy is a new material improved upon 7075 aluminum alloy, possessing higher strength and toughness, making it suitable for manufacturing high-strength structural components. In the protective bracket 20, the 7175 aluminum alloy can withstand significant mechanical loads, ensuring the stability of the protective bracket 20 under complex working conditions.

[0042] In summary, the present invention provides an engine oil filter end cap protection device. Compared with the prior art, its advantages are as follows: The bolt holes 11 evenly distributed around the outer periphery of the end cap body 10 and the corresponding first through holes 22 on the protective bracket 20 are used to achieve uniform fastening via bolt assembly 30, ensuring uniform force on the sealing surface between the end cap and the engine body, reducing the risk of seal failure due to uneven local force; the protective bracket 20 is composed of a horizontal first plate 21 and a vertical second plate 23, forming a stable support structure, which helps maintain the stability of the end cap during operation. To prevent changes in the sealing gap caused by vibration or deformation, the set screw assembly 40 is located at the center of the protective bracket 20. By limiting the vertical movement of the end cover body 10, it prevents the end cover from shifting due to vibration or external force during engine operation, and avoids oil leakage caused by misalignment of the sealing surface. The bolt assembly 30 achieves vertical fastening, and the set screw assembly 40 provides vertical constraint, forming a three-dimensional protection system that comprehensively suppresses end cover displacement. This effectively avoids the potential for traditional aero-engine end covers and wire thread sleeves to come loose, leading to loosening of the lubricating oil filter end cover, causing a large amount of lubricating oil leakage, and affecting the safe operation of the aero-engine.

[0043] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. An engine oil filter end cap guard characterized by, include: End cap body (10), protective bracket (20), bolt assembly (30) and set screw assembly (40); The end cap body (10) is located below the engine lubrication assembly, and a plurality of bolt holes (11) are evenly provided around the outer periphery of the end cap body (10). The protective bracket (20) is disposed below the end cap body (10). The protective bracket (20) is detachably connected to the end cap body (10). The protective bracket (20) includes a first plate (21) arranged in the horizontal direction and a second plate (23) arranged in the vertical direction. The second plate (23) is disposed on one side of the first plate (21) and connected to the first plate (21). The first plate (21) has first through holes (22) at both ends. Two adjacent first through holes (22) are corresponding to the bolt holes (11). The second plate (23) has a second through hole (24). The bolt assembly (30) is disposed on the protective bracket (20), and the bolt assembly (30) is respectively inserted into the first through hole (22) and the second through hole (24) for fixing the protective bracket (20) and the end cap body (10); The set screw assembly (40) is disposed on the protective bracket (20), and the set screw assembly (40) is used to restrict the downward movement of the end cap body (10) in the vertical direction.

2. The engine oil filter end cap guard of claim 1, wherein, The first plate (21) includes a connecting part (211) and two symmetrically arranged extensions (212). The extensions (212) are respectively disposed at both ends of the connecting part (211) and arranged at an angle. The first through hole (22) is disposed at the end (43) of the extension (212) away from the connecting part (211).

3. The engine oil filter end cap protection device according to claim 2, characterized in that, The bolt assembly (30) includes a first bolt member (31), the number of which is the same as the number of the connecting parts (211). The first bolt member (31) is located on one side of the first through hole (22). The first bolt member (31) is inserted into the first through hole (22) and the bolt hole (11) in sequence. The first bolt member (31) is used to fix the protective bracket (20) and the end cap body (10).

4. The engine oil filter end cap protection device according to claim 3, characterized in that, The bolt assembly (30) further includes a second bolt member (32), which is disposed on one side of the second through hole (24). The engine housing has a connection hole corresponding to the second through hole (24). The second bolt member (32) is inserted into the second through hole (24) and the connection hole in sequence. The second bolt member (32) is used to reinforce the protective bracket (20).

5. The engine oil filter end cap protection device according to claim 1, characterized in that, The set screw assembly (40) includes a head (41), a rod (42), and an end (43). The rod (42) passes through the first plate (21) in a vertical direction. The head (41) is located at one end of the rod (42) and is connected to the end cap body (10). The end (43) is located at the other end of the rod (42).

6. The engine oil filter end cap protection device according to claim 5, characterized in that, The head (41) has a support portion (44) at one end near the end cap body (10). The support portion (44) is connected to the end cap body (10), and the outer diameter of the support portion (44) is larger than the outer diameter of the head (41) to increase the contact area between the set screw assembly (40) and the end cap body (10).

7. The engine oil filter end cap protection device according to claim 6, characterized in that, The outer wall of the rod body (42) is provided with an internal thread, and the inner wall of the end (43) is provided with an external thread that matches the internal thread. The end (43) is threadedly connected to the rod body (42) to restrict the downward movement of the rod body (42) in the vertical direction.

8. The engine oil filter end cap protection device according to claim 1, characterized in that, The end cap body (10) has a shaft hole (12) in the center, which is used to release residual oil inside the engine. The end cap body (10) also includes a plug (13), which is inserted into the shaft hole (12) to seal the shaft hole (12).

9. The engine oil filter end cap protection device according to claim 8, characterized in that, The plug (13) is provided with a sealing ring (14) at one end near the shaft hole (12), and the sealing ring (14) is used to prevent oil from flowing out of the shaft hole (12).

10. The engine oil filter end cap protection device according to claim 1, characterized in that, The protective bracket (20) is made of aluminum alloy.

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