Vortex type steam seal structure of steam turbine

Abstract

The utility model belongs to the field of steam turbine equipment, and particularly relates to a steam turbine vortex type steam seal structure which comprises two steam seal shells, a positioning assembly is arranged in an inner cavity of one steam seal shell, two positioning blocks are fixedly installed in an inner cavity of the other steam seal shell, springs are arranged in the inner cavities of the two steam seal shells, and the two positioning blocks are fixedly installed in the inner cavity of the other steam seal shell. The number of the springs is multiple. The positioning assembly is arranged, a screw driver is used for rotating a screw, the steam seal shell can be mounted and dismounted, therefore, the maintenance efficiency of workers is improved, the vortex grooves are formed in the surface of the sealing gasket, the air flow can be dissipated and disturbed, and therefore the use sealing performance of a steam turbine is improved; the problems that an existing vortex type steam seal structure is usually assembled through screws, installation is troublesome, after internal parts are abraded, workers need to disassemble the screws one by one, and therefore the maintenance efficiency of the workers is reduced are solved.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine equipment, specifically a steam turbine vortex-type steam seal structure. Background Technology

[0002] The device is installed between the moving and stationary parts of the steam turbine to reduce or prevent steam leakage and air leakage from the vacuum side. In order to reduce air leakage in the gaps mentioned above and to ensure the normal and safe operation of the steam turbine, various steam seals are specially set up. The vortex steam seal is a further improvement on the comb-tooth steam seal, that is, it is equipped with multiple vortex chambers. In order to reduce the steam flow velocity and increase the steam flow resistance, the kinetic energy of the high-speed steam flow rushing into the cavity due to inertia is consumed, so that the steam flow is fully dissipated in the vortex chamber.

[0003] Existing vortex steam seal structures are typically assembled using screws, which is not only cumbersome to install, but also requires workers to disassemble each screw individually when internal parts wear out, thus reducing maintenance efficiency. Therefore, a new vortex steam seal structure for steam turbines is proposed to address these issues. Utility Model Content

[0004] To overcome the shortcomings of existing technologies and solve the problem that existing vortex steam seal structures are usually assembled with screws, which is not only cumbersome to install, but also requires workers to disassemble each screw one by one when the internal parts are worn, thus reducing the maintenance efficiency of workers, this utility model proposes a steam turbine vortex steam seal structure.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a turbine vortex-type steam seal structure, including two steam seal shells, one of which has a positioning component in its inner cavity, and the other has two positioning blocks fixedly installed in its inner cavity. Both steam seal shells have springs in their inner cavities, and the number of springs is several. One end of each spring is fixedly connected to the inner wall of the steam seal shell, and the other end of each spring is fixedly connected to an arc-shaped partition. The surface of the arc-shaped partition contacts the inner wall of the steam seal shell. An arc-shaped connecting frame is fixedly connected to the inner side of the arc-shaped partition. One side of the arc-shaped connecting frame penetrates the steam seal shell and is fixedly connected to an arc-shaped steam seal tooth. A sealing gasket is fixedly connected to the inner cavity of the arc-shaped steam seal tooth. A vortex groove is formed on the surface of the sealing gasket, and the number of vortex grooves is several.

[0006] The positioning assembly includes two bidirectional lead screws, both of which are rotatably connected to the inner cavity of the gas seal housing. Both ends of the bidirectional lead screws penetrate the gas seal housing and are fixedly connected with screws. The surface of the bidirectional lead screws is threaded with two threaded sleeves, and the top of the threaded sleeves is fixedly connected with a locking block.

[0007] Preferably, the card block is L-shaped and is used in conjunction with the positioning block.

[0008] Preferably, a limiting block is fixedly connected to one side of the threaded sleeve, and one side of the limiting block is in contact with the inner wall of the gas seal housing.

[0009] By setting a limit block, the threaded sleeve can be limited to prevent its position from shifting during use.

[0010] Preferably, a sealing block is fixedly connected to each of the two gas seal housings on opposite sides. The sealing block is made of rubber and has a hollow structure. The surface of the sealing block is in contact with the surface of the arc-shaped connecting frame.

[0011] Preferably, one of the gas seal housings has a limiting hole at its top, and the other gas seal housing has a limiting post fixedly connected to its bottom for use with the limiting hole.

[0012] By setting limit holes and limit posts, the two gas seal housings can be positioned, thereby improving the stability of the installation.

[0013] Preferably, the sealing gasket is arc-shaped and made of rubber.

[0014] Preferably, one of the gas seal housings has four through holes on its surface for use with screws.

[0015] The utility model is beneficial in that:

[0016] This invention improves maintenance efficiency by incorporating a positioning component that allows for the installation and removal of the steam seal shell using a screwdriver. Furthermore, the surface of the sealing gasket features vortex grooves that dissipate and turbulent the airflow, enhancing the turbine's sealing performance. This design addresses the problem that existing vortex steam seal structures typically rely on screws for assembly, which is cumbersome and requires manual disassembly of screws after internal parts wear, thus reducing maintenance efficiency. Attached Figure Description

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

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is an enlarged cross-sectional view of the structure of the steam seal shell and the arc-shaped steam seal teeth of this utility model.

[0020] Figure 3 This is an enlarged cross-sectional view of the arc-shaped gas seal tooth and sealing gasket of this utility model.

[0021] Figure 4 This is a bottom sectional view of the structure of the gas seal housing of this utility model;

[0022] Figure 5 This is an enlarged cross-sectional view of the structure of the gas seal housing of this utility model.

[0023] In the diagram: 1. Gas seal housing; 2. Positioning assembly; 201. Two-way lead screw; 202. Screw; 203. Threaded sleeve; 204. Locking block; 205. Limiting block; 3. Positioning block; 4. Spring; 5. Arc-shaped partition; 6. Arc-shaped connecting frame; 7. Arc-shaped gas seal teeth; 8. Sealing gasket; 9. Vortex groove; 10. Sealing block; 11. Limiting hole; 12. Limiting post; 13. Through hole. Detailed Implementation

[0024] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0026] This application discloses a vortex-type steam seal structure for a steam turbine. (Refer to...) Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A turbine vortex-type steam seal structure includes two steam seal shells 1. One steam seal shell 1 has a positioning component 2 installed in its inner cavity, and the other steam seal shell 1 has two positioning blocks 3 fixedly installed in its inner cavity. Both steam seal shells 1 have springs 4 installed in their inner cavities. The number of springs 4 is several. One end of the spring 4 is fixedly connected to the inner wall of the steam seal shell 1, and the other end of the spring 4 is fixedly connected to an arc-shaped partition 5. The surface of the arc-shaped partition 5 contacts the inner wall of the steam seal shell 1. An arc-shaped connecting frame 6 is fixedly connected to the inner side of the arc-shaped partition 5. One side of the arc-shaped connecting frame 6 penetrates the steam seal shell 1 and is fixedly connected to an arc-shaped steam seal tooth 7. A sealing gasket 8 is fixedly connected to the inner cavity of the arc-shaped steam seal tooth 7. A vortex groove 9 is formed on the surface of the sealing gasket 8. The number of vortex grooves 9 is several.

[0027] The positioning assembly 2 includes two bidirectional lead screws 201, both of which are rotatably connected to the inner cavity of the steam seal housing 1. Both ends of the bidirectional lead screws 201 penetrate the steam seal housing 1 and are fixedly connected with screws 202. The surface of the bidirectional lead screws 201 is threadedly connected to two threaded sleeves 203, and the top of the threaded sleeves 203 is fixedly connected to a locking block 204. By setting the positioning assembly 2, the steam seal housing 1 can be installed and disassembled by turning the screws 202 with a screwdriver, thereby improving the maintenance efficiency of the staff. In addition, the surface of the sealing gasket 8 is provided with vortex grooves 9, which can dissipate and turbulent the airflow, thereby improving the sealing performance of the steam turbine.

[0028] Reference Figure 2 and Figure 5 The locking block 204 is L-shaped and works in conjunction with the positioning block 3. By setting the L-shaped locking block 204, the locking block 204 can be locked onto the surface of the positioning block 3, thereby fixing the two steam seal shells 1.

[0029] Reference Figure 5 A limiting block 205 is fixedly connected to one side of the threaded sleeve 203, and one side of the limiting block 205 contacts the inner wall of the steam seal housing 1. By setting the limiting block 205, the threaded sleeve 203 can be limited to prevent the threaded sleeve 203 from shifting position during use.

[0030] Reference Figure 2 and Figure 5 Each of the two steam seal housings 1 has a sealing block 10 fixedly connected to one side of its opposite side. The sealing block 10 is made of rubber and has a hollow structure. The surface of the sealing block 10 is in contact with the surface of the arc-shaped connecting frame 6. By setting the sealing block 10 with a hollow structure, when the arc-shaped steam seal teeth 7 drive the arc-shaped connecting frame 6 and the arc-shaped partition 5 to squeeze the spring 4, the sealing block 10 is deformed by force, which can improve the sealing performance of the steam seal mechanism.

[0031] Reference Figure 2 and Figure 4 One of the steam seal housings 1 has a limiting hole 11 on its top, and the other steam seal housing 1 has a limiting post 12 fixedly connected to its bottom for use with the limiting hole 11. By setting the limiting hole 11 and the limiting post 12 to cooperate, the two steam seal housings 1 can be positioned, thereby improving the stability of the installation.

[0032] Reference Figure 2 , Figure 3 and Figure 4 The sealing gasket 8 is arc-shaped and made of rubber. By setting the sealing gasket 8 made of rubber, not only is the sealing effect good, but the vortex groove 9 inside it can achieve the function of turbulence and dissipation of airflow.

[0033] Reference Figure 1 One of the gas seal housings 1 has four through holes 13 on its surface for use with screws 202. By setting through holes 13, space can be provided for screws 202, and the screws 202 can be prevented from protruding and affecting the appearance of the gas seal structure.

[0034] Working principle: During use, the airflow enters through one end of the vortex groove 9 and exits from the other end. This not only turbulences the airflow but also dissipates it, thereby improving the sealing performance of the steam turbine. When the operator needs to maintain or replace internal parts, they use a screwdriver to turn the screw 202. When the screw 202 rotates, it drives the double-acting screw 201 to rotate. When the double-acting screw 201 rotates, it drives the two threaded sleeves 203 to move in opposite directions. When the two threaded sleeves 203 move in opposite directions, they drive the two locking blocks 204 to move in opposite directions. After the two locking blocks 204 disengage from the positioning block 3, one of the steam seal housings 1 can be removed from the top of the other steam seal housing 1.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A vortex-type steam seal structure for a steam turbine, characterized in that: The device includes two steam seal housings (1), one of which has a positioning component (2) in its inner cavity, and the other has two positioning blocks (3) fixedly installed in its inner cavity. Both steam seal housings (1) have springs (4) in their inner cavities. The number of springs (4) is several. One end of each spring (4) is fixedly connected to the inner wall of the steam seal housing (1), and the other end of each spring (4) is fixedly connected to an arc-shaped partition (5). The surface of the arc-shaped partition (5) is in contact with the inner wall of the steam seal housing (1). An arc-shaped connecting frame (6) is fixedly connected to the inner side of the arc-shaped partition (5). One side of the arc-shaped connecting frame (6) penetrates the steam seal housing (1) and is fixedly connected to an arc-shaped steam seal tooth (7). A sealing gasket (8) is fixedly connected to the inner cavity of the arc-shaped steam seal tooth (7). A vortex groove (9) is formed on the surface of the sealing gasket (8). The number of vortex grooves (9) is several. The positioning component (2) includes two bidirectional lead screws (201), both of which are rotatably connected to the inner cavity of the steam seal housing (1). Both ends of the bidirectional lead screws (201) penetrate the steam seal housing (1) and are fixedly connected with screws (202). The surface of the bidirectional lead screws (201) is threaded with two threaded sleeves (203), and the top of the threaded sleeves (203) is fixedly connected with a locking block (204).

2. The turbine vortex steam seal structure according to claim 1, characterized in that: The card block (204) is L-shaped and is used in conjunction with the positioning block (3).

3. The turbine vortex steam seal structure according to claim 1, characterized in that: A limiting block (205) is fixedly connected to one side of the threaded sleeve (203), and one side of the limiting block (205) is in contact with the inner wall of the gas seal housing (1).

4. The turbine vortex steam seal structure according to claim 1, characterized in that: Two gas seal housings (1) are fixedly connected to a sealing block (10) on opposite sides. The sealing block (10) is made of rubber and has a hollow structure. The surface of the sealing block (10) is in contact with the surface of the arc-shaped connecting frame (6).

5. The turbine vortex steam seal structure according to claim 1, characterized in that: One of the gas seal housings (1) has a limiting hole (11) on its top, and the other gas seal housing (1) has a limiting post (12) fixedly connected to its bottom to cooperate with the limiting hole (11).

6. The turbine vortex steam seal structure according to claim 1, characterized in that: The sealing gasket (8) is arc-shaped and made of rubber.

7. The turbine vortex steam seal structure according to claim 1, characterized in that: One of the gas seal housings (1) has four through holes (13) on its surface for use with screws (202).

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