CN211900703U

CN211900703U - Steam turbine shaft end combined steam sealing device

Info

Publication number: CN211900703U
Application number: CN202020205819.2U
Authority: CN
Inventors: 潘洪涛
Original assignee: Tufgai Energy Technology Shanghai Co ltd
Current assignee: Tufgai Energy Technology Shanghai Co ltd
Priority date: 2020-02-25
Filing date: 2020-02-25
Publication date: 2020-11-10
Anticipated expiration: 2030-02-25

Abstract

The utility model relates to a steam turbine technical field just discloses a steam turbine axle head combination vapor seal device, including the vapor seal body, the fixed high tooth of the equal fixedly connected with in both sides of vapor seal body bottom, the bottom of vapor seal body and the inboard that is located fixed high tooth are provided with the short tooth of activity that the equidistance distributes. This steam turbine axle head combination vapor seal device, fix the short tooth of activity through the limiting plate, avoid its inside from the fixed slot to break away from, then move the clamp plate through first tensioning spring pushing down, make its bottom contact with the top of the short tooth of activity all the time, thereby promote the short tooth of activity downwards through first tensioning spring and clamp plate, in order to ensure its vapor seal effect, when dismantling, because the short tooth of activity has worn and torn, thereby demolish to it violently, then with the impurity in the fixed slot get rid of can, need not to change whole vapor seal, thereby simple structure has been reached, be convenient for change the short tooth, improve its life's purpose.

Description

Steam turbine shaft end combined steam sealing device

Technical Field

The utility model relates to a steam turbine technical field specifically is a steam turbine axle head combination vapor seal device.

Background

A steam turbine is also called as a steam turbine engine and is a rotary steam power device, high-temperature and high-pressure steam passes through a fixed nozzle to become accelerated airflow and then is sprayed on blades, so that a rotor provided with blade rows rotates and does work outwards, the steam turbine is main equipment of a modern thermal power plant and is also used in the metallurgical industry, the chemical industry and a ship power device, the structure of the steam turbine is greatly improved due to the continuous development of the metallurgical technology, a large unit generally adopts a double-layer structure of a high-medium pressure cylinder, the high-medium pressure rotor adopts a rotor structure, all high, medium and low pressure rotors adopt a block forging structure, a bearing adopts a tilting pad structure more, the development and design of large-capacity and high-parameter units are carried out in various countries, and a steam sealing device at the shaft end is one of very important devices.

The steam seal device in the prior art can generate great damage in long-term use to influence the use effect of the steam seal device, and the steam seal is generally directly discarded to cause certain waste, so that the steam seal device combined with the shaft end of the steam turbine is provided to solve the problems.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a steam turbine axle head combination vapor seal device, possess simple structure, be convenient for change the dogtooth, improve advantages such as its life, solved the vapor seal device among the prior art and can produce great damage in long-term use, influence its result of use, and this kind of vapor seal generally directly abandons, causes certain extravagant problem.

(II) technical scheme

For realizing above-mentioned simple structure, be convenient for change short tooth, improve its life's purpose, the utility model provides a following technical scheme: a steam turbine shaft end combined steam seal device comprises a steam seal body, wherein both sides of the bottom of the steam seal body are fixedly connected with fixed high teeth, the bottom of the steam seal body and the inner sides of the fixed high teeth are provided with movable short teeth distributed at equal intervals, the inside of the steam seal body is provided with fixed grooves corresponding to the movable short teeth, the inside of each fixed groove is connected with a pressing plate in a sliding manner, the top of each pressing plate is fixedly connected with first tensioning springs distributed uniformly, the top ends of the first tensioning springs are fixedly connected with the inner walls of the fixed grooves, the top ends of the movable short teeth extend to the inside of the fixed grooves, the bottom of each pressing plate is contacted with the top ends of the movable short teeth, the tops of both sides of the movable short teeth and the inside of the fixed grooves are provided with moving grooves, the inside of the moving grooves is connected with a limiting block in a sliding manner, and, the limiting plate is kept away from the inside that the one end of stopper extends to the fixed slot, the spacing groove has all been seted up to the both sides of fixed slot inner wall, the inside of limiting plate sliding connection and spacing groove.

Preferably, one side of the limiting block, which is far away from the limiting plate, is fixedly connected with a second tensioning spring, and one end, which is far away from the limiting block, of the second tensioning spring is fixedly connected with the inner wall of the moving groove.

Preferably, the locating slot has all been seted up to the both sides of clamp plate bottom, the top fixedly connected with of activity dogtooth and the locating piece that the locating slot corresponds, the locating piece is pegged graft in the inside of locating slot.

Preferably, the guide plates are fixedly connected to two sides of the top of the pressing plate, the guide grooves corresponding to the guide plates are formed in the inner tops of the fixing grooves, and the guide plates are connected to the inner portions of the guide grooves in a sliding mode.

Preferably, the bottom of the gland sealing body is fixedly connected with a sealing ring at the outer side of the movable short teeth, and the inner side of the sealing ring is in contact with the surface of the movable short teeth.

(III) advantageous effects

Compared with the prior art, the utility model provides a steam turbine axle head combination vapor seal device possesses following beneficial effect:

1. this steam turbine axle head combination vapor seal device, fix the short tooth of activity through the limiting plate, avoid its inside from the fixed slot to break away from, then move the clamp plate through first tensioning spring pushing down, make its bottom contact with the top of the short tooth of activity all the time, thereby promote the short tooth of activity downwards through first tensioning spring and clamp plate, in order to ensure its vapor seal effect, when dismantling, because the short tooth of activity has worn and torn, thereby demolish to it violently, then with the impurity in the fixed slot get rid of can, need not to change whole vapor seal, thereby simple structure has been reached, be convenient for change the short tooth, improve its life's purpose.

2. This steam turbine axle head combination vapor seal device promotes stopper and limiting plate through second tensioning spring, makes its inside at the spacing groove that can be more firm slide, fixes a position movable short tooth through constant head tank and locating piece, makes its installation more accurate, then protects first tensioning spring through the deflector, avoids impurity to enter into the top of clamp plate when dismantling and causes the damage for first tensioning spring, seals the fixed slot through the sealing washer, makes its sealed effect better.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a front sectional view of the overall structure of the present invention;

fig. 3 is an enlarged view of a portion a in fig. 2 according to the present invention.

In the figure: 1. a gland sealing body; 2. fixing the high teeth; 3. movable short teeth; 4. a seal ring; 5. a guide groove; 6. a guide plate; 7. a first tension spring; 8. fixing grooves; 9. positioning blocks; 10. positioning a groove; 11. pressing a plate; 12. a second tension spring; 13. a moving groove; 14. a limiting block; 15. a limiting plate; 16. a limiting groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, a steam turbine shaft end combined steam seal device comprises a steam seal body 1, both sides of the bottom of the steam seal body 1 are fixedly connected with fixed high teeth 2, the bottom of the steam seal body 1 and the inner sides of the fixed high teeth 2 are provided with movable short teeth 3 distributed equidistantly, the inside of the steam seal body 1 is provided with a fixed groove 8 corresponding to the movable short teeth 3, the inside of the fixed groove 8 is slidably connected with a pressing plate 11, the top of the pressing plate 11 is fixedly connected with first tensioning springs 7 distributed uniformly, the top ends of the first tensioning springs 7 are fixedly connected with the inner wall of the fixed groove 8, the top ends of the movable short teeth 3 extend to the inside of the fixed groove 8, the bottom of the pressing plate 11 is in contact with the top ends of the movable short teeth 3, the top parts of the two sides of the movable short teeth 3 and the inside of the fixed groove 8 are both provided with movable grooves 13, the inside of the movable, one side of the limit block 14 is fixedly connected with a limit plate 15, one end of the limit plate 15, which is far away from the limit block 14, extends into the fixed groove 8, both sides of the inner wall of the fixed groove 8 are provided with limit grooves 16, the limit plate 15 is slidably connected with the inside of the limit grooves 16, when in use, the limit plate 15 is manually shifted towards the inner side, then the movable short teeth 3 are inserted into the inside of the fixed groove 8, so that the limit plate 15 extends into the limit grooves 16, at the moment, the movable short teeth 3 are fixed through the limit plate 15 to be prevented from being separated from the inside of the fixed groove 8, then the pressure plate 11 is pressed downwards through the first tensioning spring 7, the bottom of the pressure plate is always contacted with the top ends of the movable short teeth 3, therefore, the movable short teeth 3 are pushed downwards through the first tensioning spring 7 and the pressure plate 11 to ensure the steam sealing effect, when in disassembly, because the movable short teeth 3, then with the fixed slot 8 in the impurity get rid of can, need not to change whole vapor seal to reached simple structure, be convenient for change short tooth, improved its life's purpose.

In this embodiment, specifically, stopper 14 keeps away from one side fixedly connected with second tensioning spring 12 of limiting plate 15, and second tensioning spring 12 keeps away from one end of stopper 14 and the inner wall fixed connection of shifting chute 13, promotes stopper 14 and limiting plate 15 through second tensioning spring 12, makes its inside slip at limiting groove 16 that can be more firm.

In this embodiment, specific, constant head tank 10 has all been seted up to the both sides of clamp plate 11 bottom, and the locating piece 9 that the top fixedly connected with of activity dogtooth 3 corresponds with constant head tank 10, and locating piece 9 is pegged graft in the inside of constant head tank 10, fixes a position activity dogtooth 3 through constant head tank 10 and locating piece 9, makes its installation more accurate.

In this embodiment, specifically, the equal fixedly connected with deflector 6 in both sides at clamp plate 11 top, guide way 5 that corresponds with deflector 6 is seted up at the interior top of fixed slot 8, and deflector 6 sliding connection protects first tensioning spring 7 in the inside of guide way 5 through deflector 6, and impurity avoids entering into the top of clamp plate 11 when dismantling and causes the damage for first tensioning spring 7.

In this embodiment, specifically, the bottom of the gland sealing body 1 is fixedly connected with the sealing ring 4 at the outer side of the movable short teeth 3, the inner side of the sealing ring 4 is in contact with the surface of the movable short teeth 3, and the fixing groove 8 is sealed by the sealing ring 4, so that the sealing effect is better.

The working principle is as follows: when using, manual stir limiting plate 15 to the inboard, then insert the inside of fixed slot 8 with the short tooth 3 of activity, make limiting plate 15 extend to limiting groove 16's inside, fix the short tooth 3 of activity through limiting plate 15 this moment, avoid it to break away from the inside of fixed slot 8, then move clamp plate 11 through first tensioning spring 7 pushing down, make its bottom contact with the top of the short tooth 3 of activity all the time, thereby promote the short tooth 3 of activity downwards through first tensioning spring 7 and clamp plate 11, with the steam seal effect of guarantee, when dismantling, because the short tooth 3 of activity has worn and torn, thereby carry out the violence to it and demolish, then with the impurity in the fixed slot 8 get rid of can, need not to change whole steam seal, thereby simple structure has been reached, be convenient for change the short tooth, improve its life's purpose.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a steam turbine axle head combination gland sealing device, includes gland sealing body (1), its characterized in that: the steam seal comprises a steam seal body (1), wherein fixed high teeth (2) are fixedly connected to two sides of the bottom of the steam seal body (1), movable short teeth (3) which are distributed equidistantly are arranged at the bottom of the steam seal body (1) and located on the inner side of the fixed high teeth (2), fixed grooves (8) corresponding to the movable short teeth (3) are formed in the steam seal body (1), a pressing plate (11) is connected to the inside of the fixed grooves (8) in a sliding mode, first tensioning springs (7) which are distributed uniformly are fixedly connected to the top of the pressing plate (11), the top ends of the first tensioning springs (7) are fixedly connected with the inner walls of the fixed grooves (8), the top ends of the movable short teeth (3) extend to the inside of the fixed grooves (8), the bottom of the pressing plate (11) is in contact with the top ends of the movable short teeth (3), and moving grooves (13) are formed in the tops of two sides of the movable short teeth (3) and, the inside sliding connection that removes groove (13) has stopper (14), one side fixedly connected with limiting plate (15) of stopper (14), the one end that stopper (14) were kept away from in limiting plate (15) extends to the inside of fixed slot (8), spacing groove (16) have all been seted up to the both sides of fixed slot (8) inner wall, limiting plate (15) sliding connection is in the inside of spacing groove (16).

2. The steam turbine shaft end combination gland seal of claim 1, wherein: one side of the limiting block (14) far away from the limiting plate (15) is fixedly connected with a second tensioning spring (12), and one end, far away from the limiting block (14), of the second tensioning spring (12) is fixedly connected with the inner wall of the moving groove (13).

3. The steam turbine shaft end combination gland seal of claim 1, wherein: locating slot (10) have all been seted up to the both sides of clamp plate (11) bottom, the top fixedly connected with of activity dogtooth (3) has locating piece (9) that correspond with locating slot (10), locating piece (9) are pegged graft in the inside of locating slot (10).

4. The steam turbine shaft end combination gland seal of claim 1, wherein: the equal fixedly connected with deflector (6) in both sides at clamp plate (11) top, guide way (5) that correspond with deflector (6) are seted up at the interior top of fixed slot (8), deflector (6) sliding connection is in the inside of guide way (5).

5. The steam turbine shaft end combination gland seal of claim 1, wherein: the bottom of the steam seal body (1) is fixedly connected with a sealing ring (4) on the outer side of the movable short teeth (3), and the inner side of the sealing ring (4) is in contact with the surface of the movable short teeth (3).