Multi-group rotary sealing structure

Abstract

The utility model belongs to the technical field of sealing rings, and particularly discloses a multi-group rotary sealing structure, which comprises a piston, a shell is sleeved outside the piston, the piston is rotatably connected with the shell, the piston is hermetically connected with the shell through a plurality of groups of sealing components, the plurality of groups of sealing components are sleeved on the piston in a row, and a plurality of groups of sealing components are arranged on the shell. The multiple sealing assemblies are located in grooves in the outer wall of the piston, each sealing assembly comprises an O-shaped ring and a Glyd ring, and the corresponding O-shaped ring is sleeved with the Glyd ring. According to the multi-group rotary sealing structure, the multiple groups of sealing assemblies are arranged in the groove with the fixed width on the piston in a row and are effectively connected with the shell in a sealing manner, so that the problems caused by the fixed width of the groove are solved to a certain extent, and the groove can be fully filled to form tight contact.

Description

Technical Field

[0001] The utility model belongs to the technical field of sealing rings, and in particular relates to a multi-group rotating sealing structure. Background Art

[0002] With the continuous advancement of aviation technology, the performance requirements of aircraft are increasing, especially in the field of sealing performance between pistons and housings. In aircraft systems, pistons are key moving parts, and they need to maintain a good seal with the housing during rotation to prevent leakage of oil, gas or other media, ensuring the normal operation and safety of the aircraft.

[0003] Existing aircraft pistons usually use a single seal to achieve the seal between the piston and the housing. However, this structure has some problems in practical applications. First, since the width of the groove on the piston is fixed, there may be a size mismatch when installing the seal. If the width of the seal is too wide, the seal may not be fully installed, resulting in seal failure. If the width of the seal is too narrow, although the seal assembly can be installed, a gap may be left between the groove and the seal assembly, which also leads to a decrease in sealing performance.

[0004] Therefore, the inventor is committed to designing a sealing structure to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a multi-group rotary sealing structure, which can compensate for the problem caused by the groove width shaping to a certain extent, so as to ensure that the groove can be filled and form a close contact.

[0006] In order to achieve the above object, a technical solution adopted by the utility model is:

[0007] A multi-group rotating sealing structure comprises a piston, wherein the piston outer sleeve is provided with an outer shell, the piston is rotatably connected to the outer shell, the piston and the outer shell are sealedly connected through a plurality of groups of sealing components, the plurality of groups of sealing components are sleeved on the piston in a row, the plurality of groups of sealing components are located in grooves on the outer wall of the piston, each group of sealing components comprises an O-ring and a Gly ring, and the Gly ring is sleeved outside the corresponding O-ring.

[0008] As an improvement of the multi-group rotary seal structure of the utility model, the number of the sealing components is two, and the two groups of sealing components are coaxially arranged.

[0009] As an improvement of the multi-group rotary sealing structure of the utility model, the diameter of the O-ring is smaller than the width of the Gly ring.

[0010] As an improvement of the multi-group rotary seal structure of the utility model, a groove is provided on the outer wall of the Gly ring, and the outer wall of the Gly ring presses against the inner wall of the shell.

[0011] As an improvement to the multi-group rotary seal structure of the utility model, a plurality of circles of grooves are arranged on the outer wall of the same Glay ring, and the plurality of circles of grooves are arranged at intervals.

[0012] As an improvement of the multi-group rotary seal structure of the utility model, a circle of inner groove is provided on the inner wall of the Gly ring, the inner wall of the inner groove is arc-shaped, and a part of the O-ring is located in the inner groove.

[0013] As an improvement of the multi-group rotary seal structure of the utility model, the radius of the arc-shaped inner wall of the inner groove is greater than the radius of the O-ring.

[0014] As an improvement of the multi-group rotary seal structure of the utility model, the width of the groove is 8.5mm-8.65mm.

[0015] As an improvement of the multi-group rotary seal structure of the utility model, the diameter of the O-ring is 3.53 mm.

[0016] As an improvement of the multi-group rotary seal structure of the utility model, the width of the Glay ring is 3.5mm-4.5mm.

[0017] Compared with the prior art, the multiple sets of rotating seal structures of the utility model arrange multiple sets of sealing components in a row in a groove with a fixed width on the piston, and form an effective sealing connection with the outer shell, which to a certain extent compensates for the problems caused by the groove width shaping to ensure that the groove can be filled and form a close contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional structural diagram of multiple groups of rotary seal structures of the utility model;

[0019] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0020] Figure 3 It is a cross-sectional structural diagram of the piston of the utility model;

[0021] Figure 4 It is a cross-sectional view of two sets of sealing components of the utility model;

[0022] Figure 5 yes Figure 4 The enlarged view of point B in the middle;

[0023] Figure 6 It is a three-dimensional enlarged view of two sets of sealing components of the utility model;

[0024] Figure 7 It is a three-dimensional exploded enlarged view of two sets of sealing components of the utility model;

[0025] Figure 8 It is a partial cross-sectional enlarged view of the Glay ring of the utility model.

[0026] Illustration Description:

[0027] 1. Piston; 11. Groove; 2. Housing; 3. O-ring; 4. Gly ring; 41. Groove; 42. Inner groove; 5. Sealing assembly. DETAILED DESCRIPTION

[0028] The following is a detailed explanation of the implementation of the present invention in conjunction with the accompanying drawings. The accompanying drawings are for reference and illustration only and do not constitute a limitation on the scope of patent protection of the present invention.

[0029] Reference Figures 1 to 8 A multi-group rotating sealing structure includes a piston 1, a shell 2 and a plurality of groups of sealing components 5. The shell 2 is sleeved on the outside of the piston 1. The piston 1 is rotatably connected to the shell 2. The piston 1 and the shell 2 are sealed and connected through the plurality of groups of sealing components 5. The plurality of groups of sealing components 5 are sleeved on the piston 1 in a row, and the plurality of groups of sealing components 5 are located in a groove 11 on the outer wall of the piston 1.

[0030] Reference Figure 1 and Figure 3 The groove 11 is arranged in a circle on the outer wall of the piston 1. The entire groove 11 is annular. The width a of the groove 11 is 8.5mm-8.65mm. The depth of the groove 11 is 5mm. The outer shell 2 is sleeved on the outside of the piston 1 so that a sealed cavity is formed between the outer shell 2 and the groove 11 so that multiple sets of sealing components 5 can be accommodated in the sealed cavity.

[0031] Reference Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 8In the present invention, the number of the sealing components 5 is specifically two groups, and the two groups of sealing components 5 are coaxially arranged. The present invention preferably has two groups of sealing components 5, and the two groups of sealing components 5 have the same structure. Each group of sealing components 5 includes an O-ring 3 and a Gly ring 4. The O-ring 3 is annular, and the diameter of the O-ring 3 is 3.53mm. The Gly ring 4 is annular as a whole and is sleeved on the corresponding O-ring 3. The width of the Gly ring 4 is 3.5mm-4.5mm. The inner wall of the Gly ring 4 is provided with a circle of inner groove 42, and the inner wall of the inner groove 42 is arc-shaped. The arc-shaped inner wall of the inner groove 42 The wall radius is larger than the radius of the O-ring 3, a part of the O-ring 3 is located in the inner groove 42, and there is a certain gap between the two ends of the arc-shaped inner wall of the inner groove 42 and the O-ring 3. A plurality of circles of grooves 41 are provided on the outer wall of the same grid ring 4, and the plurality of circles of grooves 41 are arranged at intervals. The diameter of the O-ring 3 is smaller than the width of the grid ring 4. In the same group of sealing components 5, the O-ring 3 and the grid ring 4 are coaxially arranged, the outer wall of the grid ring 4 presses against the inner wall of the outer shell 2, the inner wall of the grid ring 4 (i.e., the arc-shaped inner wall of the inner groove 42) presses against one end of the O-ring 3, and the other end of the O-ring 3 presses against the inner wall of the groove 11.

[0032] Reference Figures 1 to 8 In the multi-group rotary sealing structure of the utility model, when the piston 1 rotates relative to the outer shell 2, the outer wall of the grid ring 4 is compressed and pressed against the inner wall of the outer shell 2, and the O-ring 3 is squeezed along the axial direction of the piston 1 to form an elliptical shape (cross section). At this time, the outer wall of the O-ring 3 and the arc-shaped inner wall of the inner groove 42 on the grid ring 4 are exactly matched and pressed against each other, and the inner wall of the O-ring 3 and the inner wall of the groove 11 on the piston 1 are pressed against each other, thereby realizing effective sealing between the piston 1 and the outer shell 2.

[0033] Reference Figures 1 to 8 The multi-group rotary seal structure of the utility model arranges two groups of sealing components 5 in a row in the groove 11 with a fixed width on the piston 1, and forms an effective sealing connection with the housing 2, which compensates for the problem caused by the fixed width of the groove 11 to a certain extent, so as to ensure that the groove 11 can be filled and form a close contact. In addition, the design of the two groups of sealing components 5 can also improve the redundancy and reliability of the sealing structure. Even if one group of sealing components 5 fails or is damaged, the other groups of sealing components 5 can still maintain the sealing performance, thereby avoiding malfunctions or accidents of the aircraft due to sealing failure.

[0034] In summary, the multi-group rotary seal structure proposed in this paper has significant advantages in solving the problems existing in the traditional sealing structure, especially in improving the sealing performance, increasing redundancy and reliability. Therefore, the structure has important practical application value and broad market prospects in the sealing application of the aircraft piston 1.

[0035] The above disclosure is only a preferred embodiment of the present invention, which cannot be used to limit the scope of protection of the present invention. Therefore, equivalent changes made within the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A multi-group rotary seal structure, comprising a piston, wherein the piston outer casing is provided with a shell, and the piston is rotatably connected to the shell, characterized in that: The piston and the housing are sealed and connected via a plurality of sealing assemblies, which are sleeved on the piston in a row and located in grooves on the outer wall of the piston. Each sealing assembly comprises an O-ring and a Gly ring, and the Gly ring is sleeved outside the corresponding O-ring.

2. The multi-group rotary seal structure according to claim 1, characterized in that: The number of the sealing components is two groups, and the two groups of sealing components are coaxially arranged.

3. The multi-group rotary seal structure according to claim 1, characterized in that: The diameter of the O-ring is smaller than the width of the Gly ring.

4. The multi-group rotary seal structure according to claim 1, characterized in that: A groove is arranged on the outer wall of the Glay ring, and the outer wall of the Glay ring presses against the inner wall of the shell.

5. The multi-group rotary seal structure according to claim 4, characterized in that: The outer wall of the same Glay ring is provided with multiple circles of grooves, and the multiple circles of grooves are arranged at intervals.

6. The multi-group rotary seal structure according to claim 1, characterized in that: An inner groove is arranged on the inner wall of the Glay ring, the inner wall of the inner groove is arc-shaped, and a part of the O-ring is located in the inner groove.

7. The multi-group rotary seal structure according to claim 6, characterized in that: The radius of the arc-shaped inner wall of the inner groove is greater than the radius of the O-ring.

8. The multi-group rotary seal structure according to claim 1, characterized in that: The width of the groove is 8.5mm-8.65mm.

9. The multi-group rotary seal structure according to claim 1, characterized in that: The diameter of the O-ring is 3.53 mm.

10. The multi-group rotary seal structure according to claim 1, characterized in that: The width of the Gray ring is 3.5mm-4.5mm.

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