Sealing structure of steam turbine shaft end steam seal body
By introducing buffering and protection components into the steam seal seal structure at the shaft end of the steam seal, the collision damage of parts is reduced, and the convenient replacement of parts is achieved through the design of the connection and steam seal assembly, which solves the easy and difficult parts to replace in the prior art. The problem of the device improves the service life and practicality.
Patent Information
- Application Number
- CN202421574242.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-07-04
AI Technical Summary
The existing steam sealing structure of the shaft end of the steam turbine is easily damaged by collision between the connecting block and the steam sealing frame during use, and it is difficult to replace damaged parts, resulting in poor practicality of the device.
A structure including a steam seal frame, a buffer assembly, a protection assembly, a connection assembly and a steam seal assembly are designed. The buffer assembly and a protection assembly reduce collision damage, and the connecting assembly and a steam seal assembly achieve convenient disassembly and replacement of parts.
It effectively reduces parts damage, extends service life, and improves the practicality and maintenance convenience of the device.
Smart Images
Figure CN222208026U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of steam turbines, in particular to a steam turbine shaft end steam seal body sealing structure. Background Art
[0002] There is a gap between the moving and the static parts of the steam turbine rotor when it passes through the cylinder. Because of the pressure difference between the inside and outside, steam will leak out or even enter the bearing box, causing water to enter the lubricating oil or external air to leak in and destroy the vacuum, which will cause steam leakage and affect the efficiency of the unit. In order to better solve the leakage phenomenon, a sealing device will be set at the shaft end of the steam turbine. The traditional shaft end steam seals mainly include labyrinth steam seals, honeycomb steam seals, and brush-type soft tooth steam seals.
[0003] The existing steam turbine shaft end steam seal body sealing structure is difficult to reduce the collision between the connecting block and the steam seal frame during operation, which makes the connecting block and the steam seal frame easy to be damaged; it is difficult to replace damaged parts during use, resulting in poor practicality of the device. Utility Model Content
[0004] The utility model aims to provide a steam turbine shaft end steam seal body sealing structure to solve the problems raised in the above background technology.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A steam seal structure for a steam turbine shaft end includes a steam seal frame, a groove is provided on the surface of the steam seal frame, a plurality of buffer components are fixedly connected to the inner top wall of the groove, a protective component is fixedly connected to the bottom end of the buffer component, a rectangular plate is slidably connected to the inside of the groove, a threaded hole is provided in the middle of the top end of the rectangular plate, a connecting component is threadedly connected to the inside of the threaded hole, and a steam seal component is fixedly connected to the bottom end of the connecting component.
[0007] The buffer component comprises an extension column, the bottom end of the surface of the extension column is slidably connected with a hollow column, and the surface of the hollow column is sleeved with a buffer spring.
[0008] The protection component comprises a buffer plate, the top end of the buffer plate is fixedly connected to the bottom end of the hollow column, and the bottom end of the buffer plate is fixedly connected to a protection pad.
[0009] The connection assembly comprises a connection bolt, the top end of the connection bolt surface is threadedly connected to a threaded hole opened in the middle of the top end of the rectangular plate, and the bottom end of the connection bolt surface is threadedly connected to a connection block.
[0010] The steam seal assembly comprises a steam seal plate, the middle part of the top end of the steam seal plate is fixedly connected to the bottom end of the connecting block, and the bottom end of the steam seal plate is fixedly connected with a plurality of steam seal strips.
[0011] The top end of the surface of the connection block is slidably connected to a groove provided on the surface of the steam seal frame.
[0012] Compared with the prior art, the beneficial effects of the utility model are:
[0013] 1. This steam turbine shaft end steam seal body sealing structure, through the arrangement of a buffer component and a protective component, can utilize the cooperation between an extension column, a hollow column and a buffer spring when in use to reduce the steam seal plate and the steam seal strip from causing the rectangular plate and the connecting block to shake and collide with the steam seal frame during the steam sealing process to cause damage. At the same time, the protective pad under the buffer plate can further reduce the damage to the rectangular plate, thereby achieving the effect of protecting the device and extending its service life.
[0014] 2. This steam seal structure of the steam seal body at the shaft end of a steam turbine can be connected to a steam seal assembly. When in use, the steam seal plate can be used in conjunction with the steam seal strip to perform steam sealing work. When performing maintenance, the connecting bolts in the threaded holes on the rectangular plate can be rotated to disassemble and replace the connecting blocks on the steam seal plate, thereby achieving the effect of improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is an overall schematic diagram of the utility model;
[0016] Figure 2 This is a schematic diagram of the buffer component and the protection component of the utility model;
[0017] Figure 3 It is a schematic diagram of the connection assembly and steam seal assembly of the utility model;
[0018] Figure 4 It is a front view schematic diagram of the utility model.
[0019] In the figure: 1. steam seal frame; 2. groove; 3. buffer assembly; 301. extension column; 302. hollow column; 303. buffer spring; 4. protection assembly; 401. buffer plate; 402. protection pad; 5. rectangular plate; 6. threaded hole; 7. connecting assembly; 701. connecting bolt; 702. connecting block; 8. steam seal assembly; 801. steam seal plate; 802. steam seal strip. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] See also Figure 1-Figure 4 As shown, a technical solution provided by the utility model:
[0022] A steam seal body sealing structure at the shaft end of a steam turbine comprises a steam seal frame 1, a groove 2 is provided on the surface of the steam seal frame 1, a plurality of buffer components 3 are fixedly connected to the inner top wall of the groove 2, a protective component 4 is fixedly connected to the bottom end of the buffer component 3, and the arrangement of the buffer component 3 and the protective component 4 can utilize the cooperation between the extension column 301, the hollow column 302 and the buffer spring 303 to reduce the steam seal plate 801 and the steam seal strip 802 from shaking during the steam seal process and causing collision with the steam seal frame 1 to cause damage, and at the same time, the protective pad 402 under the buffer plate 401 can further reduce the rectangular plate 5 is damaged, so as to achieve the effect of protecting the device and extending the service life. A rectangular plate 5 is slidably connected inside the groove 2. A threaded hole 6 is opened in the middle of the top of the rectangular plate 5. A connecting component 7 is threadedly connected inside the threaded hole 6. A steam seal component 8 is fixedly connected to the bottom end of the connecting component 7. Through the arrangement of the connecting component 7 and the steam seal component 8, the steam seal plate 801 can be used to cooperate with the steam seal strip 802 to perform steam sealing work when in use. When performing maintenance, the connecting bolt 701 in the threaded hole 6 on the rectangular plate 5 can be rotated to disassemble and replace the connecting block 702 on the steam seal plate 801, so as to achieve the effect of improving the practicality of the device.
[0023] The buffer assembly 3 includes an extension column 301, the bottom end of the surface of the extension column 301 is slidably connected with a hollow column 302, and the surface of the hollow column 302 is sleeved with a buffer spring 303;
[0024] By setting the buffer assembly 3, the extension column 301, the hollow column 302 and the buffer spring 303 can be used to cooperate with each other to reduce the steam seal plate 801 and the steam seal strip 802 from shaking and colliding with the steam seal frame 1 to cause damage during the steam sealing process, thereby achieving the effect of the protective device;
[0025] The protection assembly 4 includes a buffer plate 401, the top of the buffer plate 401 is fixedly connected to the bottom of the hollow column 302, and the bottom of the buffer plate 401 is fixedly connected to a protection pad 402;
[0026] By setting the protection component 4, the protection pad 402 under the buffer plate 401 can be used to further reduce the damage to the rectangular plate 5 during use, thereby achieving the effect of the protection device;
[0027] The connecting assembly 7 includes a connecting bolt 701, the top end of the connecting bolt 701 is threadedly connected to a threaded hole 6 opened in the middle of the top end of the rectangular plate 5, and the bottom end of the connecting bolt 701 is threadedly connected to a connecting block 702;
[0028] By setting the connection assembly 7, the connection bolt 701 in the threaded hole 6 on the rectangular plate 5 can be rotated during maintenance to disassemble and replace the connection block 702 on the steam seal plate 801, thereby reducing the replacement cost.
[0029] The steam seal assembly 8 includes a steam seal plate 801, the middle part of the top of the steam seal plate 801 is fixedly connected to the bottom end of the connecting block 702, and the bottom end of the steam seal plate 801 is fixedly connected to a plurality of steam seal strips 802;
[0030] By setting the steam seal assembly 8, when the steam seal frame 1 cooperates with the rectangular plate 5 and the connecting block 702, the steam seal plate 801 cooperates with the steam seal strip 802 to perform steam sealing, thereby achieving a sealing effect;
[0031] The top end of the connection block 702 is slidably connected to the groove 2 formed on the surface of the steam seal frame 1 .
[0032] When a steam seal body sealing structure at the shaft end of a steam turbine of the present embodiment is in use, the cooperation between the extension column 301, the hollow column 302 and the buffer spring 303 can be utilized to reduce the possibility that the steam seal plate 801 and the steam seal strip 802 drive the rectangular plate 5 and the connecting block 702 to shake and collide with the steam seal frame 1 during the steam sealing process, thereby causing damage. At the same time, the protection pad 402 under the buffer plate 401 can be utilized to further reduce the damage to the rectangular plate 5, thereby achieving the effect of protecting the device and extending its service life. The steam seal plate 801 can be utilized in conjunction with the steam seal strip 802 to perform steam sealing work. When performing maintenance, the connecting bolt 701 in the threaded hole 6 on the rectangular plate 5 can be rotated to disassemble and replace the connecting block 702 on the steam seal plate 801, thereby achieving the effect of improving the practicality of the device.
[0033] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.
Claims
1. A steam turbine shaft end steam seal body sealing structure, comprising a steam seal frame (1), Features: The surface of the steam seal frame (1) is provided with a groove (2), the inner top wall of the groove (2) is fixedly connected with a plurality of buffer components (3), the bottom end of the buffer component (3) is fixedly connected with a protection component (4), the inside of the groove (2) is slidably connected with a rectangular plate (5), the middle part of the top end of the rectangular plate (5) is provided with a threaded hole (6), the inside of the threaded hole (6) is threadedly connected with a connecting component (7), and the bottom end of the connecting component (7) is fixedly connected with a steam seal component (8).
2. A steam turbine shaft end steam seal body sealing structure according to claim 1, Features: The buffer assembly (3) comprises an extension column (301), the bottom end of the surface of the extension column (301) is slidably connected to a hollow column (302), and the surface of the hollow column (302) is sleeved with a buffer spring (303).
3. A steam turbine shaft end steam seal body sealing structure according to claim 2, Features: The protection assembly (4) comprises a buffer plate (401), the top end of the buffer plate (401) is fixedly connected to the bottom end of the hollow column (302), and the bottom end of the buffer plate (401) is fixedly connected to a protection pad (402).
4. A steam turbine shaft end steam seal body sealing structure according to claim 1, Features: The connecting assembly (7) comprises a connecting bolt (701), the top end of the connecting bolt (701) being threadedly connected to a threaded hole (6) provided in the middle of the top end of the rectangular plate (5), and the bottom end of the connecting bolt (701) being threadedly connected to a connecting block (702).
5. A steam turbine shaft end steam seal body sealing structure according to claim 4, Features: The steam seal assembly (8) comprises a steam seal plate (801), the middle part of the top end of the steam seal plate (801) is fixedly connected to the bottom end of the connection block (702), and the bottom end of the steam seal plate (801) is fixedly connected to a plurality of steam seal strips (802).
6. A steam turbine shaft end steam seal body sealing structure according to claim 4, Features: The top end of the surface of the connection block (702) is slidably connected to a groove (2) provided on the surface of the steam seal frame (1).