A multi-layer sealing structure suitable for different high-pressure environments

Abstract

The utility model provides a kind of multilayer sealing structure suitable for different high-pressure environment, it is related to the technical field of oil seal structure, including the reduction gearbox shell with shaft cavity and the reduction gearbox output shaft installed in shaft cavity, detachably installed with the oil supply flange coaxial with reduction gearbox output shaft in reduction gearbox shell, the outer wall of oil supply flange is provided with annular groove, and Gley circle is installed in annular groove and adheres to the inner wall of shaft cavity;The utility model seals the gap between oil supply flange and reduction gearbox shell by setting double-layer ring body, the utility model double-layer ring body sealing can cope with the torsional change between oil supply flange and reduction gearbox shell, fill the gap by the way of deformation, keep the sealing effect in oil circuit, keep stable.

Description

Technical Field

[0001] This utility model relates to the technical field of oil sealing structures, and in particular to a multi-layer sealing structure suitable for different high-pressure environments. Background Technology

[0002] Aircraft have multiple drive shaft structures. Oil seal technology is required between the drive shaft and the fixed parts. Oil seal structure specifically refers to the component system used for sealing lubricating oil in mechanical equipment. It mainly forms a medium barrier by being assembled on the surface of the target structural part or shaft part, effectively preventing water phase and oil phase fluids from permeating and migrating along the mating interface or rotating shaft, and avoiding affecting the pressure of the internal and external cavities.

[0003] In current industrial applications, existing sealing structures and their matching components use single metal parts, which cannot meet the requirements for long-term sealing under high-pressure environments. Traditional sealing solutions use interference fits, mechanically pressing the oil seal structure into the pre-set mounting holes in the substrate, relying on the compressive stress of the mating surfaces to achieve sealing performance. The surface roughness of the mounting holes is required to be Ra1.6μm (or higher). However, under actual dynamic working conditions, factors such as shaft vibration and pressure differences between the inner and outer cavities can easily cause sealing interface failure, which may lead to the prominent problem of lubricating medium leakage along the rotating shaft. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a multi-layer sealing structure suitable for different high-pressure environments to solve the problem that the shaft sealing structure cannot meet the long-term sealing requirements under high-pressure environments.

[0005] Based on the technical problems existing in the background art, this utility model proposes a multi-layer sealing structure suitable for different high-pressure environments, including a gearbox housing with a shaft cavity and a gearbox output shaft installed in the shaft cavity. An oil supply flange coaxial with the gearbox output shaft is detachably installed in the gearbox housing. An annular groove is provided on the outer wall of the oil supply flange, and a Glyd ring is installed in the annular groove and fits against the inner wall of the shaft cavity.

[0006] Preferably, the oil supply flange has an oil passage at its center, and the gearbox housing has a high-pressure oil passage. When the oil supply flange and the gearbox housing are installed, the high-pressure oil passage is connected to the oil passage and can deliver oil to the shaft cavity.

[0007] Preferably, the side of the oil supply flange away from the output shaft of the gearbox is provided with a circular groove surrounding the oil passage, and a rubber sealing ring is installed in the circular groove.

[0008] Preferably, there are multiple annular grooves, and each annular groove is equipped with a Glyd ring.

[0009] Preferably, the glyph includes a first ring body and a second ring body, the second ring body is located inside the first ring body, the outer ring of the second ring body fits into the inner ring of the first ring body, the outer ring of the first ring body fits into the inner wall of the shaft cavity, and the inner ring of the second ring body fits into the inner wall of the ring groove.

[0010] Preferably, the first ring body is made of metal, and the outer ring of the first ring body is chamfered.

[0011] Preferably, the second ring is made of rubber and has an elliptical cross-section.

[0012] Compared with existing technologies, the multi-layer sealing structure proposed in this utility model, applicable to different high-pressure environments, achieves the following technical effects by adopting the above-mentioned technical solution:

[0013] This invention uses a double-layer ring to seal the gap between the oil supply flange and the gearbox housing. The double-layer ring seal can cope with the torsional changes between the oil supply flange and the gearbox housing, filling the gap through deformation to maintain the sealing effect in the oil circuit and keep it stable. This invention can increase the number of Gladley rings to ensure the reliability of the sealing structure under different oil pressures, and can achieve sealing effects under different oil pressures in a limited space. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the internal structure of the cross section of this utility model;

[0015] Figure 2 This is a schematic diagram of the oil supply flange structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the Gladley ring structure of this utility model.

[0017] In the diagram: 51, shaft cavity; 5, gearbox housing; 3, gearbox output shaft; 1, oil supply flange; 11, annular groove; 2, Glyd ring; 12, oil passage; 6, high-pressure oil passage; 13, circular groove; 4, rubber sealing ring; 21, first ring body; 22, second ring body; 211, chamfer. Detailed Implementation

[0018] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] Example

[0020] Please refer to Figures 1-3 This utility model proposes a multi-layer sealing structure suitable for different high-pressure environments, including a gearbox housing 5 with a shaft cavity 51 and a gearbox output shaft 3 installed in the shaft cavity 51. An oil supply flange 1 coaxial with the gearbox output shaft 3 is detachably installed in the gearbox housing 5. An annular groove 11 is provided on the outer wall of the oil supply flange 1. A Gladius ring 2 is installed in the annular groove 11 and fits against the inner wall of the shaft cavity 51.

[0021] In the above scheme, the output shaft can rotate inside the gearbox housing 5. One end of the output shaft abuts against the oil supply flange 1. The oil supply flange 1 can guide the oil into the shaft cavity 51 to lubricate the surface of the output shaft. The Gladius ring 2 is installed between the output shaft and the gearbox housing 5, which can isolate the oil, prevent the oil from flowing back from the gap between the output shaft and the gearbox housing 5, and maintain the oil pressure in the shaft cavity 51.

[0022] In specific implementation, refer to Figure 1 , Figure 2 The oil supply flange 1 has an oil passage 12 at its center, and the gearbox housing 5 has a high-pressure oil passage 6. When the oil supply flange 1 and the gearbox housing 5 are installed, the high-pressure oil passage 6 is connected to the oil passage 12 and can supply oil to the shaft cavity 51.

[0023] In the above scheme, the oil supply flange 1 can guide the oil in the high-pressure oil passage 6 into the shaft cavity 51, which can fully maintain the lubrication in the oil cavity and reduce the friction between the output shaft and the gearbox housing 5. The oil supply flange 1 and the gearbox housing 5 are fixedly connected by bolts.

[0024] In specific implementation, refer to Figure 1 The oil supply flange 1 has a circular groove 13 surrounding the oil passage 12 on the side away from the output shaft 3 of the gearbox, and a rubber sealing ring 4 is installed in the circular groove 13.

[0025] In the above scheme, after the oil passage 12 in the oil supply flange 1 is connected to the high-pressure oil passage 6, there will still be a gap between the oil supply flange 1 and the gearbox housing 5. The rubber sealing ring 4 installed in the circular groove 13 can isolate the gap around the oil passage 12, preventing oil from leaking out between the oil supply flange 1 and the gearbox housing 5 and affecting the oil pressure.

[0026] In specific implementation, refer to Figure 1 , Figure 2 There are multiple annular grooves 11, and each annular groove 11 is equipped with a Gladwell ring 2.

[0027] In the above scheme, the number of annular grooves 11 can be increased or decreased as needed. Since different shafts require different hydraulic pressure supplies, a larger number of annular grooves 11 can increase the upper limit of hydraulic pressure they can withstand by installing multiple Glyd rings 2, which can cope with various hydraulic seal installations.

[0028] In specific implementation, refer to Figure 3 The glyph 2 includes a first ring body 21 and a second ring body 22. The second ring body 22 is located inside the first ring body 21. The outer ring of the second ring body 22 is attached to the inner ring of the first ring body 21. The outer ring of the first ring body 21 is attached to the inner wall of the shaft cavity 51. The inner ring of the second ring body 22 is attached to the inner wall of the ring groove 11.

[0029] In the above scheme, the first ring 21 is made of metal and the second ring 22 is made of rubber. During installation, the first ring 21 can contact the inner wall of the shaft cavity 51 and has the ability to withstand pressure when the shaft of the oil supply flange 1 is slightly tilted. The first ring 21 can increase the sealing between the inner ring of the first ring 21 and the oil supply flange 1. Even if there is a slight misalignment between the axis of the first ring 21 and the oil supply flange 1, the second ring 22 can also compensate by deformation to maintain the sealing effect. Both the first ring 21 and the second ring 22 are complete rings.

[0030] In specific implementation, refer to Figure 3 The first ring body 21 is made of metal, and the outer ring of the first ring body 21 is provided with a chamfer 211.

[0031] In the above scheme, the chamfer 211 provided on the first ring body 21 facilitates the disassembly of the first ring body 21.

[0032] In specific implementation, refer to Figure 3 The second ring 22 is made of rubber and has an elliptical cross-section.

[0033] In the above scheme, the second ring 22 can fill the gap between the first ring 21 and the oil supply flange 1. When the axes between the two do not coincide, the second ring 22 can also fill the gap by deformation to maintain the sealing effect.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A multi-layer sealing structure suitable for use in different high pressure environments, characterized in that, The gearbox includes a gearbox housing (5) with a shaft cavity (51) and a gearbox output shaft (3) installed in the shaft cavity (51). An oil supply flange (1) coaxial with the gearbox output shaft (3) is detachably installed in the gearbox housing (5). An annular groove (11) is provided on the outer wall of the oil supply flange (1). A Glyd ring (2) is installed in the annular groove (11) and fits against the inner wall of the shaft cavity (51).

2. The multi-layer sealing structure suitable for different high-pressure environments according to claim 1, wherein, The oil supply flange (1) has an oil passage (12) at its center, and the gearbox housing (5) has a high-pressure oil passage (6). When the oil supply flange (1) and the gearbox housing (5) are installed, the high-pressure oil passage (6) is connected to the oil passage (12) and can supply oil to the shaft cavity (51).

3. The multi-layer sealing structure suitable for different high-pressure environments according to claim 2, characterized in that, The oil supply flange (1) has a circular groove (13) surrounding the oil passage (12) on the side away from the output shaft (3) of the gearbox, and a rubber sealing ring (4) is installed in the circular groove (13).

4. The multi-layer sealing structure suitable for different high-pressure environments according to claim 1, wherein, The annular groove (11) has multiple grooves, and each annular groove (11) is equipped with a Gladius ring (2).

5. The multilayer sealing structure suitable for different high pressure environments according to claim 2, wherein, The glyph (2) includes a first ring body (21) and a second ring body (22). The second ring body (22) is located inside the first ring body (21). The outer ring of the second ring body (22) is attached to the inner ring of the first ring body (21). The outer ring of the first ring body (21) is attached to the inner wall of the shaft cavity (51). The inner ring of the second ring body (22) is attached to the inner wall of the ring groove (11).

6. The multi-layer sealing structure suitable for different high-pressure environments according to claim 5, characterized in that, The first ring (21) is made of metal, and the outer ring of the first ring (21) is provided with a chamfer (211).

7. The multilayer sealing structure according to claim 5, wherein The second ring (22) is made of rubber and has an elliptical cross-section.

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