CN211448772U - Double-cross spring piece for steam turbine steam sealing device - Google Patents
Double-cross spring piece for steam turbine steam sealing device Download PDFInfo
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- CN211448772U CN211448772U CN202020030219.7U CN202020030219U CN211448772U CN 211448772 U CN211448772 U CN 211448772U CN 202020030219 U CN202020030219 U CN 202020030219U CN 211448772 U CN211448772 U CN 211448772U
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- spring leaf
- spring
- steam
- steam turbine
- gland sealing
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Abstract
The utility model discloses a double cross spring leaf for a steam turbine steam seal device, which comprises a spring leaf body; a pair of spring leaf extending bodies are arranged on two sides of the spring leaf body; the spring leaf extending bodies on the two sides of the spring leaf body are symmetrically arranged; the spring piece body and the spring piece extension body form a double cross-shaped structure. The utility model discloses increase the area of contact of spring leaf and gland sealing ring draw-in groove, the tight power of spring leaf when increasing gland sealing ring card on the gland casing reduces because of the tight power of spring leaf not enough causes the gland sealing ring not hard up and arouses gland sealing tooth and the gland sealing steam leakage loss and the vibration that the rotor friction caused.
Description
Technical Field
The utility model relates to a two cross spring pieces for gland sealing and baffle gland sealing around the fixed steam turbine belong to power equipment technical field.
Background
The steam turbine generally adopts tooth-like gland sealing circle, for reducing the steam turbine gland sealing and leaking steam, the steam turbine gland sealing circle is generally 0.2 ~ 0.4mm with rotor assembly clearance. When the steam turbine runs for a long time, the friction between the steam seal ring and the rotor causes the abrasion of steam seal teeth, the clearance between the steam seal and the rotor is increased, the steam leakage of the steam seal is increased, the internal efficiency of the steam turbine is reduced, and therefore the steam seal ring needs to be replaced periodically. For convenience of installation and replacement, the steam seal ring is often divided into six arc sections, and a spring leaf is installed on a groove of each arc section, as shown in fig. 1, the steam seal ring is clamped on a steam seal body B through the elasticity of the spring leaf A, so that the steam seal ring C is prevented from sliding. The contact area of the existing spring piece A and the steam seal ring C is small, the tightening force is insufficient, the spring piece is easy to fall off from the clamping groove, the steam seal ring slides, the steam seal tooth and the rotor D are strongly rubbed, the steam turbine strongly vibrates, and the power plant is shut down due to accidents. Further influence the axial thrust of the unit, shorten the life of rotor.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a steam turbine gland sealing device is with two cross spring leafs, solve single cross spring leaf and gland sealing circle area of contact little, tight not enough cause the gland sealing circle to slide, arouse that the gland sealing that the strong friction of gland sealing circle and rotor leads to leaks vapour greatly, and steam turbine efficiency reduces, the poor problem of user economic benefits.
In order to solve the technical problem, the utility model discloses take following technical scheme: a double cross spring leaf for a steam turbine steam seal device comprises a spring leaf body; a pair of spring leaf extending bodies are arranged on two sides of the spring leaf body; the spring leaf extending bodies on the two sides of the spring leaf body are symmetrically arranged; the spring piece body and the spring piece extension body form a double cross-shaped structure.
Furthermore, a pressing block is arranged below the spring sheet extension body.
Further, the pressing block and the spring plate extension body are connected through an elastic preload piece.
Furthermore, the elastic preload piece of the elastic preload piece is a Z-shaped spring piece, and two ends of the Z-shaped spring piece are respectively welded with the pressing block and the spring piece extension body.
The utility model has the advantages that:
1. the design double cross spring leaf increases the area of contact of spring leaf and gland sealing circle draw-in groove, increases the tight power of spring leaf when gland sealing circle card is on the gland casing, reduces because of the spring leaf tight power not enough cause the gland sealing circle not hard up and arouse gland sealing tooth and the steam leak loss and the vibration that the rotor friction caused.
2. The service life of the steam seal teeth and the rotor is prolonged, the overhaul period of a steam turbine user is prolonged, and the maintenance cost is reduced.
3. Economic benefits are as follows: the model B18-8.83/1.0 high-temperature high-pressure back press has the advantages that the steam seal clearance is reduced by 0.1mm each time, the steam leakage of the steam seal can be reduced by 0.7t/h by a steam turbine, the generated energy is increased by 90KW, the unit operates for 6000 hours per year, the electricity price is calculated by 0.75 yuan, and the annual income is increased by about 40.5 ten thousand yuan.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic view of the assembly of a rotor, a gland seal ring and a gland seal body.
Fig. 2 is a top view of the present invention.
Fig. 3 is a side view of the present invention.
Detailed Description
The technical solution of the present invention will be described clearly and completely through the following detailed description.
As shown in fig. 2 and 3, the double cross spring leaf for the steam turbine steam seal device of the present invention comprises a spring leaf body 1; a pair of spring piece extending bodies 2 are arranged on two sides of the spring piece body 1; the spring leaf extending bodies 2 on the two sides of the spring leaf body 1 are symmetrically arranged; the spring piece body 1 and the spring piece extension body 2 form a double cross-shaped structure. And a pressing block 3 is arranged below the spring piece extension body 2. The pressing block 3 and the spring leaf extension body 2 are connected through an elastic preload piece 4. The elastic preload piece 4 is a Z-shaped spring piece, and two ends of the Z-shaped spring piece are respectively welded with the pressing block 3 and the spring piece extension body 2.
The utility model discloses design two cross recesses on each segmental arc of gland sealing circle, increase the area of contact of spring leaf and gland sealing circle, it is not hard up to avoid the spring leaf through elasticity pretension piece 4 and compact heap 3, and then reduces the gland sealing steam leakage that the strong friction of gland sealing tooth and rotor leads to, reduces installation cost of maintenance for the user simultaneously, improves steam turbine operation safety and stability nature, increases user economic benefits.
The above-mentioned embodiments are only described as the preferred embodiments of the present invention, and are not intended to limit the concept and scope of the present invention, and the technical content of the present invention, which is claimed by the present invention, is fully recorded in the technical claims.
Claims (4)
1. The utility model provides a steam turbine is two cross spring leaf for gland sealing device which characterized in that: comprises a spring piece body (1); a pair of spring leaf extending bodies (2) is arranged on both sides of the spring leaf body (1); the spring leaf extending bodies (2) on the two sides of the spring leaf body (1) are symmetrically arranged; the spring piece body (1) and the spring piece extension body (2) form a double cross-shaped structure.
2. The double cross spring plate for a steam turbine gland seal according to claim 1 wherein: a pressing block (3) is arranged below the spring piece extension body (2).
3. The double cross spring plate for a steam turbine gland seal according to claim 2, wherein: the pressing block (3) and the spring leaf extension body (2) are connected through an elastic preload piece (4).
4. The double cross spring plate for a steam turbine gland seal according to claim 3, wherein: the elastic preload pieces (4) are Z-shaped spring pieces, and two ends of each Z-shaped spring piece are respectively welded with the pressing block (3) and the spring piece extending body (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020030219.7U CN211448772U (en) | 2020-01-08 | 2020-01-08 | Double-cross spring piece for steam turbine steam sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020030219.7U CN211448772U (en) | 2020-01-08 | 2020-01-08 | Double-cross spring piece for steam turbine steam sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211448772U true CN211448772U (en) | 2020-09-08 |
Family
ID=72299627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020030219.7U Active CN211448772U (en) | 2020-01-08 | 2020-01-08 | Double-cross spring piece for steam turbine steam sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211448772U (en) |
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2020
- 2020-01-08 CN CN202020030219.7U patent/CN211448772U/en active Active
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