A rotor seal ring

Abstract

The application provides a rotor sealing ring, belonging to the technical field of aeroengines and gas turbines, and specifically comprising a coaxially arranged annular positioning part, an annular connecting part and an annular sealing part; the outer side surface of the annular positioning part abuts against the inner side surface of a convex ring, the two end edges of the annular positioning part extend to the side of the axis of the annular positioning part, the two opposite end edges of the annular positioning part are each provided with an annular connecting part, the annular sealing part is connected to one end of the annular connecting part away from the annular positioning part, the annular sealing part gradually bends to one side of the axis from one end close to the annular connecting part to the other end, the side surface of the bent annular sealing part away from the annular positioning part forms an arc-shaped sealing surface for abutting against a sealing end surface, the centrifugal force received by the annular sealing part during rotation of the rotor is greater than that of the annular positioning part and the annular connecting part, and the annular sealing part is inclined to the side away from the axis around the annular connecting part. Through the processing scheme, the sealing performance is improved.

Description

Technical Field

[0001] This application relates to the field of aero engines and gas turbines, and in particular to a rotor sealing ring. Background Technology

[0002] As the heart of an aircraft, the aero-engine directly impacts its performance, reliability, and economy. Aero-engines operate under extremely harsh conditions, including high temperature, high pressure, high speed, and high load. To ensure the reliable operation of the engine and its systems, the sealing positions must be reliable. The performance of the sealing ring directly affects flight safety, component lifespan, maintenance frequency, and many other issues. Most sealing materials possess characteristics such as elasticity and creep. In actual sealing, the structure and material of the sealing ring directly influence changes in sealing performance. For example, creep affects sealing performance; over time, most sealing materials age or their effective elasticity gradually decreases. During this process, the sealing force decreases, and when it reaches a critical value, leakage occurs, leading to seal failure. Summary of the Invention

[0003] In view of this, this application provides a rotor sealing ring that solves the problems in the prior art, reduces the impact of creep and elasticity reduction on the sealing ring under long-term high-temperature environment, and improves sealing performance.

[0004] The rotor sealing ring provided in this application adopts the following technical solution:

[0005] A rotor sealing ring for sealing two rotor joints, the joints including opposing rotor sealing end faces and a protruding ring protruding from the sealing end faces, the sealing ring including a coaxially arranged annular positioning part, an annular connecting part and an annular sealing part;

[0006] The outer side of the annular positioning part abuts against the inner side of the convex ring. The two ends of the annular positioning part extend toward the axial side of the annular positioning part. Both opposite ends of the annular positioning part are provided with annular connecting parts. The annular connecting parts extend away from the annular positioning part along the axial direction of the annular positioning part. The annular sealing part connects to the end of the annular connecting part away from the annular positioning part. The annular sealing part gradually bends towards the axial side from the end near the annular connecting part to the other end. The side of the annular sealing part facing away from the annular positioning part after bending forms an arc-shaped sealing surface for abutting against the sealing end face. The centrifugal force experienced by the annular sealing part when the rotor rotates is greater than that of the annular positioning part and the annular connecting part. The annular sealing part tilts away from the axial side around the annular connecting part.

[0007] Optionally, the thickness of the annular sealing portion is greater than that of the annular positioning portion and the annular connecting portion.

[0008] Optionally, the inner side of the annular slit portion is provided with a protruding counterweight.

[0009] Optionally, in the axial direction of the annular positioning part, both ends of the annular positioning part extend in an arc shape toward the axis of the annular positioning part, and the center of the arc is toward the axis of the annular positioning part.

[0010] Optionally, the annular positioning portion and the annular connecting portion are connected by an arc-shaped transition section recessed towards the axis.

[0011] Optionally, the annular positioning part, the annular connecting part, and the annular sealing part are integrally formed.

[0012] Optionally, the linear expansion coefficient of the sealing ring material is not less than the linear expansion coefficient of the rotor material being sealed.

[0013] Optionally, the surface finish of the sealing ring is not less than Ra0.8.

[0014] In summary, this application includes the following beneficial technical effects:

[0015] The annular sealing part experiences a greater centrifugal force than the annular positioning part and the annular connecting part during rotor rotation. This greater outward centrifugal force forces the annular sealing part to shift outward relative to these parts, causing it to tilt and increasing the width of the sealing ring. This results in a tighter fit between the annular sealing part and the sealing end face, enhancing the sealing performance. Compared to traditional sealing methods that rely solely on elasticity and deformation, this method utilizes not only the initial elastic deformation sealing during assembly but also the centrifugal force generated by the high-speed rotor rotation during operation for further sealing. Therefore, its sealing performance is unaffected by creep and decreased elasticity under prolonged high-temperature conditions. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a partial cross-sectional view of the joint between the sealing ring and the rotor in this application;

[0018] Figure 2 This is a schematic diagram of the sealing ring structure of this application;

[0019] Figure 3 This is a cross-sectional view of the sealing ring of this application;

[0020] Figure 4 A structure in which the sealing ring does not have a counterweight.

[0021] Figure 5 This is a schematic diagram of the deformation state of the sealing ring under stress in this application.

[0022] Explanation of reference numerals in the attached drawings: 1. Annular positioning part; 2. Annular connecting part; 3. Annular sealing part; 31. Counterweight part; 4. Sealing end face; 5. Protruding ring. 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 drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the 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 a rotor sealing ring.

[0029] like Figures 1-4 As shown, the rotor sealing ring of this application is used to seal the joint of two rotors. A connecting flange is located outside the joint, and the flange is fixedly connected by bolts. The joint includes opposing rotor sealing end faces 4 and protruding rings 5 ​​protruding from the sealing end faces 4. After the end faces of the two protruding rings 5 ​​abut against each other, a sealing cavity is formed between the two sealing end faces 4. The sealing ring is a metal sealing ring.

[0030] The sealing ring includes an annular positioning part 1, an annular connecting part 2, and an annular sealing part 3, which are coaxially arranged. The outer side of the annular positioning part 1 abuts against the inner side of the convex ring 5. Both ends of the annular positioning part 1 extend towards the axial side of the annular positioning part 1. Annular connecting parts 2 are provided on both opposite ends of the annular positioning part 1. The annular connecting parts 2 extend away from the annular positioning part 1 along the axial direction of the annular positioning part 1. Annular sealing parts 3 are provided on the ends of the two annular connecting parts 2 away from the annular positioning part 1. The annular sealing parts 3 connect to the ends of the annular connecting parts 2 away from the annular positioning part 1. The annular sealing parts 3 gradually bend towards the axial side of the sealing ring from the end near the annular connecting part 2 to the other end. The side of the annular sealing parts 3 facing away from the annular positioning part 1 after bending forms an arc-shaped sealing surface for abutting against the sealing end face 4. The arc-shaped sealing surface protrudes from the side away from the annular positioning part.

[0031] The annular sealing part 3 experiences a greater centrifugal force than the annular positioning part 1 and the annular connecting part 2 during rotor rotation. The annular sealing part 3 tilts away from the axis of rotation around the annular connecting part 2. Specifically, the annular sealing part 3 experiences a greater outward centrifugal force than the annular positioning part 1 and the annular connecting part 2, forcing it to displace outward relative to them. This tilting of the annular sealing part 3 tends to increase the width of the sealing ring, allowing it to more tightly abut against the sealing end face, thus enhancing sealing performance. Compared to traditional sealing methods that rely solely on elasticity and deformation, this method utilizes not only the initial elastic deformation sealing during assembly but also the centrifugal force generated by the high-speed rotation of the rotor during operation. Therefore, its sealing performance is unaffected by creep and elasticity reduction under prolonged high-temperature conditions. The width of the sealing ring extends to a square length along the axial direction.

[0032] like Figure 4As shown, in one embodiment, the thickness of the annular sealing portion 3 is greater than that of the annular positioning portion 1 and the annular connecting portion 2, increasing the weight of the annular sealing portion 3. During rotor operation, the sealing ring is subjected to centrifugal force. Since the weight of the annular sealing portion 3 is greater than that of the annular positioning portion 1 and the annular connecting portion 2, the annular sealing portion 3 experiences a greater outward centrifugal force than the annular positioning portion 1 and the annular connecting portion 2. This forces the annular sealing portion 3 to deform and tilt, ultimately causing the width of the sealing ring to tend to increase, thereby enhancing the sealing performance.

[0033] like Figure 5 As shown, in one embodiment, a protruding counterweight 31 is provided on the inner side of the annular sealing portion 3. The centrifugal force is increased by adding a counterweight to the annular sealing portion 3, and since it is located inside the annular sealing portion 3, the addition of the counterweight 31 does not affect the contact surface profile between the annular sealing ring and the rotor sealing end face 4.

[0034] Figure 5 The middle arrow points to the direction of centrifugal force. The solid line represents the sealing ring when it is not subjected to centrifugal force, and the dashed line represents the sealing ring after being subjected to centrifugal force. The specific process of deformation of the annular sealing part 3 is as follows: the annular sealing part 3 is subjected to a greater outward force, the annular sealing part 3 rotates around the annular connecting part 2, the annular connecting part 2 acts as a pivot and support, the annular sealing part 3 deforms and tilts around the annular connecting part 2, and finally the width of the sealing ring tends to increase, thereby achieving the effect of strengthening the sealing performance.

[0035] Along the axial direction of the annular positioning part 1, the arc-shaped edges of both ends of the annular positioning part 1 extend outward toward the axial center of the annular positioning part 1, with the center of the arc facing the axis of the annular positioning part 1.

[0036] The annular positioning part 1 and the annular connecting part 2 are connected by an arc-shaped transition section that is recessed towards the axis of the sealing ring.

[0037] In this application, the annular positioning part 1, the annular connecting part 2, and the annular sealing part 3 are connected by a circular arc transition and are integrally machined.

[0038] The annular positioning part 1, the annular connecting part 2, and the annular sealing part 3 are integrally formed.

[0039] The linear expansion coefficient of the sealing ring material is not less than that of the sealing rotor material. In this application embodiment, the material selected is a metal material with a similar or larger linear expansion coefficient to the materials of the left and right rotors. In this way, the thermal expansion difference caused by the high temperature conditions during engine operation can be used to further strengthen the seal.

[0040] The surface finish of the sealing ring is not less than Ra0.8.

[0041] 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. A rotor sealing ring for sealing two rotor joints, said joint comprising opposing rotor sealing end faces and a protruding ring extending from the sealing end faces, characterized in that, The sealing ring includes an annular positioning part, an annular connecting part, and an annular sealing part arranged coaxially; The outer side of the annular positioning part abuts against the inner side of the convex ring. The two ends of the annular positioning part extend toward the axial side of the annular positioning part. Both opposite ends of the annular positioning part are provided with annular connecting parts. The annular connecting parts extend away from the annular positioning part along the axial direction of the annular positioning part. The annular sealing part connects to the end of the annular connecting part away from the annular positioning part. The annular sealing part gradually bends toward the axial side from the end near the annular connecting part to the other end. The side of the annular sealing part facing away from the annular positioning part after bending forms an arc-shaped sealing surface for abutting against the sealing end face. The centrifugal force experienced by the annular sealing part when the rotor rotates is greater than that of the annular positioning part and the annular connecting part. The annular sealing part tilts away from the axial side around the annular connecting part. The thickness of the annular sealing part is greater than that of the annular positioning part and the annular connecting part; The inner side of the annular sealing part is provided with a protruding counterweight; The annular positioning part and the annular connecting part are connected by an arc-shaped transition section that is recessed towards the axis.

2. The rotor sealing ring according to claim 1, characterized in that, Along the axial direction of the annular positioning part, both ends of the annular positioning part extend in an arc towards the axis of the annular positioning part, and the center of the arc faces the axis of the annular positioning part.

3. The rotor sealing ring according to claim 1, characterized in that, The annular positioning part, annular connecting part, and annular sealing part are integrally formed.

4. The rotor sealing ring according to claim 1, characterized in that, The linear expansion coefficient of the sealing ring material is not less than that of the linear expansion coefficient of the rotor material being sealed.

5. The rotor sealing ring according to claim 1, characterized in that, The surface finish of the sealing ring is not less than Ra0.8.

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