CN201059205Y - High pressure cylinder velocity level sealing strip - Google Patents
High pressure cylinder velocity level sealing strip Download PDFInfo
- Publication number
- CN201059205Y CN201059205Y CNU2007200963349U CN200720096334U CN201059205Y CN 201059205 Y CN201059205 Y CN 201059205Y CN U2007200963349 U CNU2007200963349 U CN U2007200963349U CN 200720096334 U CN200720096334 U CN 200720096334U CN 201059205 Y CN201059205 Y CN 201059205Y
- Authority
- CN
- China
- Prior art keywords
- pressure cylinder
- washer
- labyrinth strip
- strip
- high pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a speed stage gland strip for a high pressure cylinder. A gland strip is arranged in a T-shaped groove produced in a governing stage blade top inner cylinder or a partition bushing, a packing sheet is arranged close to the gland strip, the top of the packing sheet is closely coordinated with the T-shaped top, a locking sheet is arranged close to the packing sheet and is fixed to further fix the gland strip. The utility model has the advantages that: even the bigger vortex force can not cause the gland strip to vibrate and fall off, so the structure of the gland strip can effectively reduce the steam leakage damage at the blade top of governing stage, improve the efficiency of governing stage and contribute greatly to the improvement of the efficiency of the whole high pressure cylinder.
Description
Technical field:
The utility model belongs to a kind of power generating equipment, particularly a kind of high-pressure cylinder velocity stage labyrinth strip.
Background technique:
My 2 500MW supercritical units of company are that preceding Russia makes.Find in the #1 major overhaul that in 1997 high-pressure cylinder velocity stage labyrinth strip comes off, and installs in the overhaul afterwards.Resistance vapour chip architecture is formed a circle after being packed into by conduit by 18 sections labyrinth strips, the labyrinth strip material is 1Cr13.Steam turbine 500MW is main vapour pressure 23.54MPa when (at full capacity).Come off and its of labyrinth strip have relation more really in the structure at governing stage place and the running parameter of governing stage.Enthalpy drop that governing stage bears and pressure drop are ranks of high-pressure cylinder maximum, and the steam flow whirling motion power that causes at the movable vane top is bigger, and the former labyrinth strip horizontal integration face ca(u)lk that is designed to of this place's labyrinth strip.The segmental arc diameter of labyrinth strip is bigger, can cause the vibration that the packing arc is disconnected under bigger whirling motion power.Produce fatigue fracture, consequently cause to come off.Coming off of high-pressure cylinder velocity stage resistance vapour sheet has a strong impact on the Economy of unit operation.
Summary of the invention:
The purpose of this utility model just is to overcome above-mentioned the deficiencies in the prior art, and a kind of high-pressure cylinder velocity stage labyrinth strip is provided, and the structure of this labyrinth strip can prevent the generation of obscission effectively.
The technical solution of the utility model is: a kind of high-pressure cylinder velocity stage labyrinth strip, it is characterized in that: the labyrinth strip of packing in the T-shape groove that in governing stage leaf item inner casing or diaphragm housing ring, processes, be close to the washer of packing on the labyrinth strip next door, and the top of washer and T-shape top are closely cooperated together, be close to the lock sheet and washer fixed of packing on the next door of washer, with further fixing labyrinth strip.
The utility model can also adopt following technical measures:
Above-mentioned lock sheet has crimp, and this crimp stoops can push down washer.
The utility model has the advantages that: because labyrinth strip, washer and lock sheet snugly fit in the T-shape groove that processes in governing stage leaf item inner casing or the diaphragm housing ring, and washer is fixed by lock sheet, with fixing labyrinth strip, even therefore labyrinth strip can not cause vibration yet under bigger whirling motion power, cause and come off, so this structure of labyrinth strip can reduce the leakage losses at place, governing stage leaf top effectively, improve governing stage efficient and very favourable to the efficient that improves whole high-pressure cylinder.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Embodiment:
As shown in the figure: a kind of high-pressure cylinder velocity stage labyrinth strip, the labyrinth strip 3 of packing in the T-shape groove 2 that in governing stage leaf item inner casing or diaphragm housing ring 1, processes, be close to the washer 4 of packing on the labyrinth strip next door, and the top of washer and T-shape top are closely cooperated together, be close to the lock sheet 5 of packing on the next door of washer, lock sheet has crimp 6, and this crimp stoops can push down washer.Washer is fixed, with further fixedly labyrinth strip.
Claims (2)
1. high-pressure cylinder velocity stage labyrinth strip, it is characterized in that: the labyrinth strip of packing in the T-shape groove that in governing stage leaf item inner casing or diaphragm housing ring, processes, be close to the washer of packing on the labyrinth strip next door, and the top of washer and T-shape top are closely cooperated together, be close to the lock sheet and washer fixed of packing on the next door of washer, with further fixing labyrinth strip.
2. high-pressure cylinder velocity stage labyrinth strip according to claim 1, it is characterized in that: above-mentioned lock sheet has crimp, and this crimp stoops can push down washer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200963349U CN201059205Y (en) | 2007-06-13 | 2007-06-13 | High pressure cylinder velocity level sealing strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200963349U CN201059205Y (en) | 2007-06-13 | 2007-06-13 | High pressure cylinder velocity level sealing strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201059205Y true CN201059205Y (en) | 2008-05-14 |
Family
ID=39407674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200963349U Expired - Fee Related CN201059205Y (en) | 2007-06-13 | 2007-06-13 | High pressure cylinder velocity level sealing strip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201059205Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102797512A (en) * | 2012-08-28 | 2012-11-28 | 上海电气电站设备有限公司 | Steam sealing structure for steam turbines and assembling method thereof |
| CN114991877A (en) * | 2022-08-03 | 2022-09-02 | 成都中科翼能科技有限公司 | Combined blade structure of turbine rotor |
-
2007
- 2007-06-13 CN CNU2007200963349U patent/CN201059205Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102797512A (en) * | 2012-08-28 | 2012-11-28 | 上海电气电站设备有限公司 | Steam sealing structure for steam turbines and assembling method thereof |
| CN102797512B (en) * | 2012-08-28 | 2015-07-08 | 上海电气电站设备有限公司 | Steam sealing structure for steam turbines and assembling method thereof |
| CN114991877A (en) * | 2022-08-03 | 2022-09-02 | 成都中科翼能科技有限公司 | Combined blade structure of turbine rotor |
| CN114991877B (en) * | 2022-08-03 | 2022-11-18 | 成都中科翼能科技有限公司 | Combined blade structure of turbine rotor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080514 Termination date: 20150613 |
|
| EXPY | Termination of patent right or utility model |