Sealing device with self-adjusting function
By designing a sealing device with self-adjustment function in the turbine, the self-adjustment sealing function is realized by combining high-pressure fluid pressing connectors and elastic parts, and the problems of excessive pressure in the internal chamber of the turbine and dissatisfied with the pumping requirements are solved.
Patent Information
- Application Number
- CN202411430856.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-14
- Publication Date
- 2025-02-28
AI Technical Summary
In existing steam turbines, the internal chamber pressure is too high, which has safety risks or cannot meet specific exhaust requirements.
A sealing device with a self-adjustment function is designed, and a sealed chamber is formed by a connecting member between the first and second parts, and a seal is achieved by pressing the connection member with a high-pressure fluid; the sealing assembly includes a fixing member, a sealing member and an elastic member, and the seal is movable between the connecting member and the fixing member. The elastic member provides the elastic force of the seal moving toward one side of the chamber to realize the self-adjustment function.
When the pressure in the chamber is higher than the elastic force of the elastic member, the seal moves in the direction of the fixing member, compresses the elastic member, increases the elastic force, and the fluid in the seal chamber flows out through the through holes, reducing the pressure in the chamber; when the pressure is less than the elastic force of the elastic member, the seal is pressed by the elastic force of the elastic member, and a seal is re-formed to achieve a self-adjustment function.
Smart Images
Figure CN119532429A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of steam turbine related parts and components, and in particular to a sealing device with a self-adjusting function. Background Art
[0002] Some equipment needs to have good sealing, such as steam turbines. Steam turbines are a type of rotary steam power device. As the demand for energy conservation and emission reduction continues to increase in today's society, the operating efficiency of steam turbines also needs to be continuously improved. When improving the operating efficiency of steam turbines, the steam inlet parameters of steam turbines, such as temperature, pressure and steam inlet speed, continue to rise.
[0003] In the existing steam turbine market, users have diverse requirements for steam turbines, especially the need to extract specific pressure gas from the steam turbine to supply it to other industrial sites or other uses; at the same time, the internal components of the steam turbine are composed of multiple parts, and there are gaps between the parts, which are prone to steam leakage. Therefore, it is necessary to provide a sealing device with good sealing performance at the position where sealing is required to increase the efficiency and safety performance of the steam turbine. Summary of the invention
[0004] Based on the above description, the present invention provides a sealing device with a self-adjusting function to solve the technical problems in the prior art that the pressure in some chambers inside the steam turbine is too high, posing a safety hazard or failing to meet specific air extraction requirements.
[0005] The technical solution of the present invention to solve the above technical problems is as follows: A sealing device with self-adjusting function, comprising: A connecting member is provided between the first component and the second component, wherein the connecting member, the first component and the second component form a closed chamber, the fluid pressure in the chamber is higher than the fluid pressure outside the chamber, and a through hole is formed on the connecting member to connect the inside and outside of the chamber; A sealing assembly comprises a fixing member, a sealing member and an elastic member, wherein the fixing member is fixed to the connecting member and is located on a side of the connecting member away from the chamber, an adjustment space is formed between the fixing member and the connecting member, and a guide groove is formed on a side of the fixing member close to the connecting member; the sealing member comprises a first end and a second end, the first end movably blocks the through hole, and the second end movably is arranged in the guide groove; the elastic member is arranged between the sealing member and the fixing member, and provides elastic force for the sealing member to move toward the side close to the chamber.
[0006] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: The sealing device provided by the present application forms a closed chamber by separating the first component and the second component through a connecting piece, and the high-pressure fluid in the closed chamber presses the connecting piece to achieve the sealing of the chamber by the connecting piece; the fixing piece and the connecting piece are fixed as a whole, the sealing piece is movably arranged between the connecting piece and the fixing piece, and the elastic piece is arranged between the sealing piece and the fixing piece, so that when the pressure at the first end of the sealing piece is higher than the elastic force of the elastic piece, the sealing piece will move toward the fixing piece and compress the elastic piece, the elastic force of the elastic piece will gradually increase, and the fluid in the sealed chamber will flow out from the circular through hole on the connecting piece, and when the pressure at the first end is lower than the elastic force of the elastic piece, the sealing piece will be pressed against the connecting piece by the elastic force of the elastic piece, thereby achieving the self-adjustment function.
[0007] Based on the above technical solution, the present invention can also be improved as follows.
[0008] Furthermore, the connecting piece is composed of an upper half and a lower half, and both ends of the upper half and the lower half are respectively connected to the first component and the second component; the sealing assembly is arranged on the upper half and / or the lower half.
[0009] Furthermore, the contact surfaces of the upper half and the lower half are in a serrated or stepped shape that fits with each other.
[0010] Furthermore, the first end is a conical frustum, and the through hole is a circular hole matched with the outer contour of the conical frustum.
[0011] Furthermore, the second end is a cylinder, the guide groove is a circular groove adapted to the cylinder, the conical cone and the cylinder are coaxially arranged, the large circle diameter of the conical cone is smaller than the diameter of the cylinder, and an installation groove is formed on the end surface of the second end on the side away from the first end, and the elastic member is arranged in the installation groove and contacts with the guide groove.
[0012] Furthermore, the elastic member is configured such that when the fluid pressure in the chamber is equal to the fluid pressure outside the chamber, the second end and the connecting member are tightly attached to each other by the elastic force of the elastic member.
[0013] Furthermore, a first connecting groove is formed on the first component, a second connecting groove is formed on the second component, and a first plug-in portion and a second plug-in portion are respectively formed at both ends of the connecting member, and the first plug-in portion and the second plug-in portion are respectively correspondingly arranged in the first connecting groove and the second connecting groove.
[0014] Furthermore, a set screw is installed on one side of the first connecting groove or the second connecting groove for fixing the corresponding first plug-in portion or the second plug-in portion.
[0015] Furthermore, the fixing member is connected to the connecting member through a plurality of bolts or a plurality of welding ribs.
[0016] Furthermore, it also includes a buffer component, which is connected to the first component and the second component and is arranged on a side of the connecting component away from the chamber, and a buffer chamber is formed between the buffer component and the connecting component. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 A schematic structural diagram of a sealing device with a self-adjusting function provided by an embodiment of the present invention; Figure 2 This is a schematic diagram of an installation of a connecting piece in an embodiment of the present invention; Figure 3 It is a schematic diagram of a structure having a buffer member in an embodiment of the present invention; Figure 4 Schematic diagram of the upper and lower structures of the connecting member in an embodiment of the present invention; Figure 5 Schematic diagram of the structure of the upper and lower mating surfaces of the connecting piece in an embodiment of the present invention. DETAILED DESCRIPTION
[0018] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.
[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.
[0020] It will be appreciated that spatial relationship terms such as "under", "beneath", "below", "under", "above", "above", etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It will be appreciated that, in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as "on" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90° or other orientations), and the spatial descriptors used herein are interpreted accordingly.
[0021] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. The "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.
[0022] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.
[0023] like Figure 1-5 As shown, the present application provides a sealing device with a self-adjusting function, which includes a connecting member 10 and a sealing assembly 20.
[0024] It is arranged between the first component 100 and the second component 200. In some embodiments, the first component 100 and the second component 200 can be two components on different devices, or can be an inner component and an outer component on the same device. In this embodiment, the first component 100 and the second component 200 are respectively the inner surface and the outer surface of an annular cylindrical structure, and a cavity for accommodating steam is provided between the first component 100 and the second component 200.
[0025] The connector 10, the first component 100 and the second component 200 form a closed chamber a. As shown in the figure, the left side of the connector 10 is the chamber a, and the right side is the outside of the chamber a, wherein the fluid pressure in the chamber a is higher than the fluid pressure outside the chamber a, thereby forming a pressure difference between the inside and outside of the chamber a, and the connector is pressed tightly between the first component 100 and the second component 200 through the pressure difference, forming a strict seal.
[0026] A through hole b is formed on the connecting member 10 to connect the inside and outside of the chamber a; in this embodiment, the through hole b is a small circular hole.
[0027] As a preferred installation method, the connecting member 10 is formed by two parts, namely, an upper half 101 and a lower half 102. The upper half 101 and the lower half 102 are both semi-circular ring structures. The outer end of the upper half 101 is connected to the upper part of the first component 100 (i.e., the outer surface), and the inner end of the upper half 101 is connected to the upper part of the second component 200 (i.e., the inner surface). The outer end of the lower half 102 is connected to the lower part of the first component 100, and the inner end of the lower half is connected to the lower part of the second component 200. The contact surfaces of the upper half 101 and the lower half 102 are mutually matched offset surfaces. Optionally, the offset surfaces can be offset matched serrated surfaces or offset matched step surfaces, which are not limited here. In this embodiment, the latter structure is adopted.
[0028] Optionally, the through hole b can be formed in the upper half 101 , or in the lower half 102 , or in both the upper half 101 and the lower half 102 . In the present embodiment, the through hole b is formed in both the upper half 101 and the lower half 102 .
[0029] The connecting member 10 may be a plate-shaped member or a block-shaped member, which is not limited here. In the present application, a plate-shaped member is preferred.
[0030] The sealing assembly 20 is correspondingly installed at the position with the through hole b, wherein the sealing assembly 20 includes a fixing member 21 , a sealing member 22 and an elastic member 23 .
[0031] The fixing member 21 is fixed to the connecting member 10 and is located on the side of the connecting member 10 away from the chamber a, that is, the fixing member 21 is fixed to the right side of the connecting member 10, and an adjustment space is formed between the fixing member 21 and the connecting member 10. Optionally, a plurality of bolt holes are formed on the fixing member 21, and a plurality of threaded holes are correspondingly formed on the connecting member 10. The fixing member 21 is installed on the connecting member 10 at intervals by passing bolts 212 through the bolt holes.
[0032] As another optional embodiment, the fixing member 21 is fixed to the connecting member 10 at intervals by a plurality of welding ribs. It can be understood that any fixing method can be used as long as the fixing member 21 can be fixed to the right side of the connecting member 10 and a gap of a predetermined size is formed between the fixing member 21 and the connecting member 10.
[0033] Among them, a guide groove 211 is formed on the side of the fixing member 21 close to the connecting member 10; the sealing member 22 includes a first end 221 and a second end 222, the first end 221 movably blocks the through hole b, and the second end 222 is movably arranged in the guide groove 211; the elastic member 23 is arranged between the sealing member 22 and the fixing member 21, providing elastic force for the sealing member 22 to move toward the side close to chamber a.
[0034] The sealing device provided by the present application forms a closed chamber a by separating the first component 100 and the second component 200 through the connecting member 10, and the high-pressure fluid in the closed chamber a presses the connecting member 10 to achieve the sealing of the chamber a by the connecting member 10; the fixing member 21 and the connecting member 10 are fixed as a whole, the sealing member 22 is movably arranged between the connecting member 10 and the fixing member 21, and the elastic member 23 is arranged between the sealing member 22 and the fixing member 21, so that when the pressure at the first end 221 of the sealing member 22 is higher than the elastic force of the elastic member 23, the sealing member 22 will move toward the fixing member 21 and compress the elastic member 23 so that the elastic force of the elastic member 23 gradually increases, and the fluid in the sealed chamber a will flow out from the through hole b on the connecting member 10, the pressure in the sealed chamber a is reduced, and the internal and external pressure difference is reduced or even disappears, and when the pressure at the first end 221 is less than the elastic force of the elastic member 23, the sealing member 22 is pressed against the connecting member 10 by the elastic force of the elastic member 23, thereby achieving the self-adjustment function.
[0035] Preferably, the first end 221 is a conical cone, and the through hole b is a circular hole that matches the outer contour of the conical cone. The second end 222 is a cylinder, and the guide groove 211 is a circular groove that matches the cylinder. The conical cone and the cylinder are coaxially arranged, and the large circle diameter of the conical cone is smaller than the diameter of the cylinder.
[0036] The elastic member 23 is installed in the following manner: a mounting groove 223 is formed on the end surface of the second end 222 away from the first end 221 , and the elastic member 23 is arranged in the mounting groove 223 and contacts the guide groove 211 . The elastic member is preferably a compression spring.
[0037] Preferably, the elastic member 23 is configured such that when the fluid pressure in the chamber a is equal to the fluid pressure outside the chamber a, the second end 222 and the connecting member 10 are pressed tightly together by the elastic force of the elastic member 23 .
[0038] Among them, the connection method of the connecting member 10 can be as follows: a first connecting groove 110 is formed on the first component 100, and a second connecting groove 210 is formed on the second component 200. The two ends of the connecting member 10 respectively form a first plug-in portion 11 and a second plug-in portion 12, and the first plug-in portion 11 and the second plug-in portion 12 are respectively correspondingly arranged in the first connecting groove 110 and the second connecting groove 210.
[0039] Preferably, the first plug-in portion 11 and the second plug-in portion 12 are formed in a "convex" structure to facilitate plugging and positioning.
[0040] In order to ensure the installation stability of the connecting member 10 , a set screw D is installed on one side of the first connecting groove 110 or the second connecting groove 210 for fixing the corresponding first plug-in portion 11 or the second plug-in portion 12 .
[0041] In the above embodiment, when the pressure in chamber a is higher than the elastic force of the spring, the connector is pressed against component 1 and component 2, and the fluid in chamber a is sealed in chamber a. The fluid pressure acts on the first end 221 of the seal 22, and the seal 22 moves toward the fixing member 21 due to the fluid pressure until the first end 221 of the seal 22 is separated from the connector 10. The fluid in chamber a leaks out from the circular through hole b of the connector 10. As more fluid flows out, the pressure in chamber a gradually decreases. When the pressure in chamber a is lower than the elastic force of the spring, the seal moves toward the connector 10 due to the elastic force until the second end 222 is pressed against the connector 10, thereby re-forming the seal.
[0042] However, in some extreme cases, due to the large changes in fluid pressure in chamber a formed by the connecting member 10 and the first component 100 and the second component 200, the self-adjusting function may fail when the pressure is highest. Therefore, an annular groove is opened at the upper and lower semicircular groove positions of the connecting member 10. The depth of the annular groove is smaller than that of the circular groove. A buffer member 30 is added. The buffer member 30 is connected to the first component 100 and the second component 200 and is arranged on the side of the connecting member 10 away from the chamber a. A buffer chamber c is formed between the buffer member 30 and the connecting member 10, and a fluid with a higher pressure can be introduced into the buffer chamber c to avoid failure of the sealing assembly 20.
[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A sealing device with self-adjusting function, characterized in that: include: A connecting member is provided between the first component and the second component, wherein the connecting member, the first component and the second component form a closed chamber, the fluid pressure in the chamber is higher than the fluid pressure outside the chamber, and a through hole is formed on the connecting member to connect the inside and outside of the chamber; A sealing assembly comprises a fixing member, a sealing member and an elastic member, wherein the fixing member is fixed to the connecting member and is located on a side of the connecting member away from the chamber, an adjustment space is formed between the fixing member and the connecting member, and a guide groove is formed on a side of the fixing member close to the connecting member; the sealing member comprises a first end and a second end, the first end movably blocks the through hole, and the second end movably is arranged in the guide groove; the elastic member is arranged between the sealing member and the fixing member, and provides elastic force for the sealing member to move toward the side close to the chamber.
2. The sealing device with self-adjusting function according to claim 1, characterized in that: The connecting piece is composed of an upper half and a lower half, and both ends of the upper half and the lower half are respectively connected to the first component and the second component; the sealing assembly is arranged on the upper half and / or the lower half.
3. The sealing device with self-adjusting function according to claim 2, characterized in that: The contact surfaces of the upper half and the lower half are mutually matching offset surfaces.
4. The sealing device with self-adjusting function according to claim 1, characterized in that: The first end is a conical frustum, and the through hole is a circular hole matched with the outer contour of the conical frustum.
5. The sealing device with self-adjusting function according to claim 4, characterized in that: The second end is a cylinder, the guide groove is a circular groove adapted to the cylinder, the conical cone and the cylinder are coaxially arranged, the large circle diameter of the conical cone is smaller than the diameter of the cylinder, and an installation groove is formed on the end surface of the second end on the side away from the first end, and the elastic member is arranged in the installation groove and contacts with the guide groove.
6. The sealing device with self-adjusting function according to claim 5, characterized in that: The elastic member is configured such that when the fluid pressure in the chamber is equal to the fluid pressure outside the chamber, the second end and the connecting member are tightly attached to each other by the elastic force of the elastic member.
7. The sealing device with self-adjusting function according to claim 1, characterized in that: A first connecting groove is formed on the first component, a second connecting groove is formed on the second component, and first plug-in parts and second plug-in parts are formed at both ends of the connecting member, respectively. The first plug-in parts and the second plug-in parts are respectively correspondingly arranged in the first connecting groove and the second connecting groove.
8. The sealing device with self-adjusting function according to claim 1, characterized in that: A set screw is installed on one side of the first connecting groove or the second connecting groove for fixing the corresponding first plug-in portion or the second plug-in portion.
9. The sealing device with self-adjusting function according to claim 1, characterized in that: The fixing member is connected to the connecting member through a plurality of bolts or a plurality of welding ribs.
10. The sealing device with self-adjusting function according to claim 1, characterized in that: It also includes a buffer component, which is connected to the first component and the second component and is arranged on a side of the connecting component away from the chamber, and a buffer chamber is formed between the buffer component and the connecting component.