Anti-falling metal sealing ring

Abstract

The utility model provides an anti-falling metal sealing ring, and belongs to the technical field of aero-engine bolt connection, the anti-falling metal sealing ring specifically comprises an annular main body part, the periphery of a bolt is sleeved with the annular main body part, one end face of the annular main body part is used for abutting against the screw head end face of the bolt, and the other end face of the annular main body part is used for abutting against the surface of a part in threaded connection with the bolt; a clamping structure protruding inwards in the radial direction is arranged on the inner ring of the annular main body part, and the clamping structure is engaged with threads of the bolts through the treatment scheme, so that the problem that in the prior art, a metal sealing ring is prone to falling into an engine in the mounting and dismounting process is solved, and the efficiency and reliability of the engine assembling and dismounting process are improved.

Description

Technical Field

[0001] This application relates to the field of bolted connections in aircraft engines, and in particular to a metal sealing ring designed to prevent detachment. Background Technology

[0002] Metal sealing rings, as crucial sealing components in aero-engines, are primarily used for effective sealing between various rotating and stationary parts inside the engine, preventing leakage of high-temperature, high-pressure gases and thus ensuring the engine's efficient and stable operation. However, due to the complex and harsh operating environment of aero-engines—high temperature, high pressure, high vibration, and high speed—components are required to be lightweight, compact, have excellent sealing performance, long service life, and high stability. Yet, leakage sources exist at the threaded joints of bolted connections. Current technology uses metal sealing rings at these bolted joints for sealing; however, existing metal sealing rings, which are fitted around the bolt circumference, are prone to falling into the engine during installation and disassembly, leading to low assembly and disassembly efficiency and reliability in aero-engines. Utility Model Content

[0003] In view of this, this application provides a metal sealing ring that prevents it from falling off, which solves the problem that metal sealing rings in the prior art are prone to falling into the engine during installation and disassembly, thereby improving the efficiency and reliability of engine assembly and disassembly processes.

[0004] The anti-detachment metal sealing ring provided in this application adopts the following technical solution:

[0005] A non-detachable metal sealing ring is used for sealing the threaded connection of a bolted joint. It includes an annular body that is sleeved on the outer circumference of the bolt. One end face of the annular body is used to abut against the end face of the bolt head, and the other end face of the annular body is used to abut against the surface of the part that is threadedly connected to the bolt.

[0006] The inner ring of the annular main body is provided with a snap-fit ​​structure that protrudes inward in the radial direction, and the snap-fit ​​structure engages with the thread of the bolt.

[0007] Optionally, the annular main body has a hollow structure, and an annular through groove is provided on the inner side of the annular main body.

[0008] Optionally, the snap-fit ​​structure is an annular retaining ring, the outer ring of which passes through the annular groove and is located inside the annular body, the inner ring of which protrudes toward the center of the annular body, and the inner side of which engages with the thread of the bolt.

[0009] Optionally, the annular retaining ring has an open structure.

[0010] Optionally, the width of the annular through groove along the axial direction of the annular body is greater than the thickness of the annular retaining ring in the axial direction.

[0011] Optionally, the annular main body has a circular ring structure.

[0012] Optionally, the radial cross-section of the annular main body is circular.

[0013] Optionally, the axial compression resilience of the annular main body is 5-15%.

[0014] Optionally, the surface roughness of the two end faces of the annular main body is ≤0.8μm.

[0015] In summary, this application includes the following beneficial technical effects:

[0016] The snap-fit ​​structure rotates along the thread of the bolt shank and screws onto one end of the bolt head. Then, the bolt with the metal sealing ring is installed on the part. After tightening the bolt, the bolt head and the part clamp the annular body, which seals the connection between the bolt and the part. Because the snap-fit ​​structure engages with the bolt thread, it will not fall off the bolt without external force during installation or removal, thus avoiding the problem of the metal sealing ring easily falling off during installation and removal. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the anti-detachment metal sealing ring of this application;

[0019] Figure 2 for Figure 1 A cross-sectional view along the AA direction;

[0020] Figure 3 This is a schematic diagram of the assembly structure of the anti-loosening metal sealing ring and bolts in this application;

[0021] Figure 4 This is a schematic diagram of the working structure of the anti-detachment metal sealing ring of this application.

[0022] Explanation of reference numerals in the attached drawings: 1. Annular main body; 11. Annular through groove; 2. First sealing surface; 3. Annular retaining ring; 31. Notch; 4. Second sealing ring; 5. Bolt; 6. Part. Detailed Implementation

[0023] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0024] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0026] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0027] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0028] This application provides an anti-loosening metal sealing ring for sealing the threaded joint of a bolt connection.

[0029] like Figures 1 to 4As shown, an anti-loosening metal sealing ring includes an annular body 1, which is sleeved around the outer circumference of the bolt 5. One end face of the annular body 1 is a first sealing surface 2, which abuts against the threaded end face of the bolt 5. The other end face of the annular body 1 is a second sealing surface, which abuts against the surface of the part 6 that is threadedly connected to the bolt 5. The annular body 1 serves a sealing function.

[0030] The inner ring of the annular main body 1 is provided with a snap-fit ​​structure that protrudes inward in the radial direction. The snap-fit ​​structure engages with the thread of the bolt 5. The snap-fit ​​structure rotates along the thread of the bolt 5 around the outer circumference of the bolt and screws onto one end of the bolt head. Then, the bolt 5 with the metal sealing ring is installed on the part 6. After tightening the bolt 5, the bolt head of the bolt 5 and the part 6 clamp the annular main body 1. The annular main body 1 seals the connection between the bolt 5 and the part 6. Because the snap-fit ​​structure engages with the thread of the bolt 5, it will not fall off the bolt 5 without external force when installing or removing the bolt 5, thus avoiding the problem of the metal sealing ring easily falling off during installation and removal.

[0031] The annular main body 1 has a hollow structure, and its radial cross-section is circular. An annular groove 11 is provided on the inner side of the annular main body 1. The axial compression resilience of the annular main body 1 is 5-15%.

[0032] The annular main body 1 of this application has a C-shaped radial cross-section, which can withstand greater axial force, and has good strength and stability. The annular main body 1 also has certain springback characteristics, strong vibration adaptability, and excellent overall performance. The annular main body 1 and the annular retaining ring 3 are made of high-temperature alloy material, specifically the nickel-based alloy Inconel 718, with an operating temperature range of -50℃ to 800℃, suitable for high-temperature and high-pressure applications.

[0033] The surface roughness of the two end faces of the annular main body 1 is ≤0.8μm, which improves the sealing performance of the annular main body 1.

[0034] The snap-fit ​​structure is an annular retaining ring 3. The outer ring of the annular retaining ring 3 passes through the annular through groove 11 and is located inside the annular body. The inner ring of the annular retaining ring 3 protrudes towards the center of the annular body 1, and the inner side of the annular retaining ring 3 engages with the thread of the bolt 5.

[0035] The annular retaining ring 3 is circular in shape. The annular retaining ring 3 has an open structure, meaning it is a discontinuous annular structure with a circumferential notch 31. This open structure facilitates the insertion of the annular retaining ring 3 into the annular main body 1. Specifically, one end of the annular retaining ring is first inserted through a slot into the annular main body 1. Then, the annular retaining ring 3 is rotated, gradually inserting the remaining portion of the annular retaining ring 3 through the slot into the annular main body 1 until the entire annular retaining ring 3 is embedded within the annular main body 1.

[0036] The width of the annular groove 11 along the axial direction of the annular main body 1 is greater than the thickness of the annular retaining ring 3 along the axial direction. This allows the annular retaining ring 3 to have a certain amount of movement on the annular main body 1.

[0037] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An anti-drop metal seal ring for sealing the threaded joint of a bolt (5) connection, characterized in that, The application relates to a ring-shaped main body part (1) which is sleeved on the outer periphery of a bolt (5), one end surface of the ring-shaped main body part (1) is used for abutting against the screw head end surface of the bolt (5), and the other end surface of the ring-shaped main body part (1) is used for abutting against the surface of a part (6) which is threadedly connected with the bolt (5). A clamping structure which protrudes in a radial direction is arranged on the inner ring of the ring-shaped main body part (1), and the clamping structure is threadedly engaged with the bolt (5).

2. The anti-extraction metal seal ring of claim 1, wherein, The ring-shaped main body part (1) is a hollow structure, and an annular through groove (11) is arranged on the inner ring side of the ring-shaped main body part (1).

3. The anti-extraction metal seal ring of claim 2, wherein, The clamping structure is an annular clamping ring (3), the outer ring of the annular clamping ring (3) is located inside the ring-shaped main body part (1) through the annular through groove (11), the inner ring side of the annular clamping ring (3) protrudes towards the center side of the ring-shaped main body part (1), and the inner side of the annular clamping ring (3) is threadedly engaged with the bolt (5).

4. The anti-extraction metal seal ring of claim 3, wherein, The annular clamping ring (3) is an open structure.

5. The anti-extraction metal seal ring of claim 3, wherein, The width of the annular through groove (11) in the axial direction of the ring-shaped main body part (1) is greater than the thickness of the annular clamping ring (3) in the axial direction.

6. The anti-extraction metal seal ring of claim 1, wherein, The ring-shaped main body part (1) is a circular ring structure.

7. The anti-extraction metal seal ring of claim 1, wherein, The radial section of the ring-shaped main body part (1) is a circular ring shape.

8. The anti-extraction metal seal ring of claim 1, wherein, The axial compression and rebound rate of the ring-shaped main body part (1) is 5-15%.

9. The anti-extraction metal seal ring of claim 1, wherein, The surface roughness of the two end surfaces of the ring-shaped main body part (1) is less than or equal to 0.8 microns.

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