Self-compensating wire seal ring for engine case bolt hole

Abstract

The utility model discloses a kind of self-compensating wire sealing rings for engine casing bolt hole, including the annular sheet structure of the hollow sealing ring, the top surface and bottom surface of the sealing ring are provided with several layers of circumferential wall pipes arranged along its circumference, at least one annular cavity is opened along the axis direction of the sealing ring, the force of rebound can be provided when cold and hot cycle through the hollow sheet, to realize the effect of forming self-adapting sealing, different flatness and roughness can be further adapted by the circumferential wall pipe.

Description

Technical Field

[0001] This utility model relates to the field of aviation sealing ring technology, and in particular to a self-compensating metal wire sealing ring for engine casing bolt holes. Background Technology

[0002] Traditional solid metal wire seals (such as those made of gold, silver, copper, or Inconel alloys) undergo plastic deformation under bolt preload, filling microscopic gaps to form a seal. However, under long-term high-temperature cycling and vibration in an engine, the metal will creep, causing the initial sealing pressure to decrease and potentially leading to leakage.

[0003] If there are slight deviations in the flatness and roughness of the casing mating surface, traditional metal wires cannot fully compensate for them, which can easily create leakage channels. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a self-compensating metal wire sealing ring for engine casing bolt holes, a sealing ring that can compensate for flatness and roughness and prevent slippage.

[0005] The purpose of this utility model is achieved through the following technical solution: a self-compensating metal wire sealing ring for engine casing bolt holes, comprising a hollow annular thin sheet structure, wherein the top and bottom surfaces of the sealing ring are provided with several layers of concentrically arranged circumferential wall tubes, and at least one annular cavity is opened along the axial direction of the sealing ring.

[0006] The present invention is further configured such that: radial wall tubes are evenly spaced on the outer wall of the sealing ring and arranged radially thereon, the radial wall tubes being arranged around the outer wall of the sealing ring.

[0007] The present invention is further configured such that the sealing ring is a flexible, wavy sheet structure.

[0008] The present invention is further configured such that: the sealing ring is provided with a plurality of concentric annular cavities arranged side by side.

[0009] The present invention is further configured such that: a supporting rib is provided inside the cavity.

[0010] The present invention has the following advantages: the hollow sheet can provide a rebound force during hot and cold cycles, thereby achieving an adaptive sealing effect; and the circumferential wall tube can further adapt to different flatness and roughness. Attached Figure Description

[0011] Figure 1 This is a first state diagram of the sealing ring in an embodiment of this utility model; Figure 2This is a first top view of the sealing ring in an embodiment of this utility model; Figure 3 This is a first cross-sectional view of the sealing ring in an embodiment of this utility model; Figure 4 This is a second cross-sectional view of the sealing ring in an embodiment of this utility model; Figure 5 This is a second state diagram of the sealing ring in an embodiment of this utility model; Figure 6 This is a second top view of the sealing ring in an embodiment of this utility model; Figure 7 This is a third cross-sectional view of the sealing ring in an embodiment of this utility model; Figure 8 This is a fourth cross-sectional view of the sealing ring in an embodiment of this utility model.

[0012] In the diagram: 1. Sealing ring; 2. Radial wall tube; 3. Circumferential wall tube; 4. Cavity; 5. Supporting rib. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0014] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0015] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0016] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0017] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and simplify 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. Therefore, they should not be construed as limitations on this utility model.

[0018] The following is in conjunction with the appendix Figure 1-8 The present invention will be described in further detail below, but the scope of protection of the present invention is not limited to the following description. Example

[0019] like Figure 1 , Figure 2 , Figure 3 As shown, a self-compensating metal wire sealing ring 1 for engine casing bolt holes includes a hollow annular thin sheet structure.

[0020] The top surface of the sealing ring 1 is provided with several layers of concentrically arranged circumferential wall tubes 3.

[0021] The bottom surface of the sealing ring 1 is provided with several layers of concentrically arranged circumferential wall tubes 3.

[0022] In this application, as Figure 2 As shown, the top and bottom surfaces of the sealing ring 1 are concentrically provided with three layers of circumferential wall tubes 3 of different sizes, and the diameter of adjacent circumferential wall tubes 3 decreases step by step.

[0023] like Figure 4 As shown, the circumferential wall tube 3 is a solid protruding rib.

[0024] At least one annular cavity 4 is provided along the axial direction of the sealing ring 1, and the hollow position of the sealing ring 1 is the cavity 4.

[0025] like Figure 1 and Figure 4 As shown, radial wall tubes 2 are also evenly spaced on the outer wall of the sealing ring 1 and arranged radially along its radial direction. The radial wall tubes 2 are arranged around the outer wall of the sealing ring 1.

[0026] In this embodiment, both the radial wall tube 2 and the circumferential wall tube 3 are soft metals that are easily deformed, such as oxygen-free copper and aluminum, while the sealing ring 1 itself is a high-strength, high-elasticity, and high-temperature resistant alloy such as high-performance spring steel and Inconel 718.

[0027] In this embodiment, the radial wall tube 2 and the circumferential wall tube 3 intersect to form a fan-shaped frame, which can fill more sealant and ensure a sealing effect.

[0028] Both radial wall tube 2 and circumferential wall tube 3 are soft metals that are easily deformed. The sealing ring 1 itself uses a highly elastic metal and a sealant that also has elasticity and sealing effect. This solution is more effective in some environments where the problem is only caused by hot and cold cycles.

[0029] As a preferred option: to adapt to environments with large temperature differences and high-frequency vibrations, such as... Figure 5 , Figure 6 As shown, the sealing ring 1 is a flexible, wavy sheet structure. The wavy structure has a better anti-reverse effect and can apply a reverse force to it at all times.

[0030] As a preferred embodiment, in order to reduce the weight of the upper sealing ring 1 and improve the elastic rebound force, the sealing ring 1 is provided with several annular cavities 4.

[0031] As a preferred option: such as Figure 3 , 4 As shown in Figures 7 and 8, the cross-section of cavity 4 can be circular, elliptical, or straight groove.

[0032] As a preferred embodiment: In order to prevent excessive deformation of the cavity 4 in the previous preferred embodiment and resulting plastic deformation, at least one supporting rib 5 is provided inside the cavity 4.

[0033] As a preferred option: such as Figure 3 , 4 As shown in Figures 7 and 8, a support rib 5 is provided at the top of the inner wall of cavity 4, and two support ribs 5 are provided at the bottom of the inner wall of cavity 4, which are arranged side by side and intersect with the top support rib 5.

[0034] Working principle: The hollow thin sheet provides a rebound force during hot and cold cycles, thereby achieving an adaptive sealing effect. The circumferential wall tube can further adapt to different flatness and roughness.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-compensating metal wire sealing ring for engine casing bolt holes, characterized in that: The sealing ring (1) is a hollow annular thin sheet structure. The top and bottom surfaces of the sealing ring (1) are provided with several layers of concentric circumferential wall tubes (3), and at least one annular cavity (4) is opened along the axial direction of the sealing ring (1).

2. The self-compensating metal wire sealing ring for engine casing bolt holes according to claim 1, characterized in that: The outer wall of the sealing ring (1) is also provided with radial wall tubes (2) evenly spaced along its radial direction, and the radial wall tubes (2) are arranged around the outer wall of the sealing ring (1).

3. The self-compensating metal wire sealing ring for engine casing bolt holes according to claim 2, characterized in that: The sealing ring (1) is a flexible, wavy sheet structure.

4. The self-compensating metal wire sealing ring for engine casing bolt holes according to claim 3, characterized in that: The sealing ring (1) has several concentric annular cavities (4) arranged side by side.

5. A self-compensating metal wire sealing ring for engine casing bolt holes according to any one of claims 1-4, characterized in that: The cavity (4) is provided with supporting ribs (5).

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