CN2649778Y - Radical gland sealing of duct root for tangential steam turbine - Google Patents
Radical gland sealing of duct root for tangential steam turbine Download PDFInfo
- Publication number
- CN2649778Y CN2649778Y CN 03279080 CN03279080U CN2649778Y CN 2649778 Y CN2649778 Y CN 2649778Y CN 03279080 CN03279080 CN 03279080 CN 03279080 U CN03279080 U CN 03279080U CN 2649778 Y CN2649778 Y CN 2649778Y
- Authority
- CN
- China
- Prior art keywords
- impeller
- baffle plate
- plate body
- steam turbine
- partition body
- 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 - Lifetime
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model relates to a radical gland seal of a duct root for a tangential steam turbine, which comprises an impeller, a movable blade, a baffle plate body and a static blade, wherein the movable blade is arranged on the top of the impeller, the static blade is arranged on the upper part of the baffle plate body, and a steam passage is formed between the movable blade and the static blade. The utility model is characterized in that the top of the impeller is provided with a projected platform along the axial direction, and the top of the platform is parallel to the axial direction; a groove is arranged on the upper part of the baffle plate body and corresponds to the projected platform at the top of the impeller, and a circular gland seal slice is arranged below the groove of the baffle plate body along the radical direction to seal the gap between the groove of the baffle plate body and the projected platform of the impeller. The gland seal slice is riveted with the baffle plate body. The utility model can enlarge the axial gap of the baffle plate body and the impeller to improve the running flexibility of the steam turbine unit and simultaneously reduce the steam loss of the duct root and effectively improve the whole efficiency, and the utility model has the advantages of simple structure and convenient assembly.
Description
(1) technical field
The utility model relates to impulse steam turbine steam passage root packing.
(2) background technique
In traditional impulse steam turbine,, be provided with axial packing at the steam passage root and leak vapour to reduce because the axial clearance of steam turbine is less.Yet modern impulse steam turbine adapts to daily start-stop for improving the flexibility of unit operation, generally increases the axial clearance of unit.But owing to increase the axial clearance of unit, make traditional axial packing lose effect, causing the steam passage root to leak vapour increases, and has reduced steam turbine set efficient.
(3) summary of the invention
The utility model has overcome the defective of prior art, and a kind of impulse steam turbine steam passage root radial gland is provided.This steam passage root radial gland adopts at the labyrinth strip realization of mounting circular ring shape on the partition body and the radial gland between impeller, thereby steam passage root Steam loss is significantly reduced, and has improved steam turbine set efficient effectively, and simple in structure, assembly manipulation convenience.
The utility model is achieved in that a kind of impulse steam turbine steam passage root radial gland, comprise impeller, movable vane, partition body, stator blade, movable vane is equipped with at the impeller top, stator blade is equipped with on partition body top, form steam passage between movable vane and stator blade, it is characterized in that having vertically the platform of protrusion at the impeller top, table top and parallel to an axis, one groove is arranged at partition body top, groove on the partition body is corresponding with the protrusion platform at impeller top, circular labyrinth strip radially is housed below the partition body groove, the gap between partition body groove and impeller protrusion platform is sealed.
Above-mentioned a kind of impulse steam turbine steam passage root radial gland, described labyrinth strip and partition body are riveted fixing.
Working principle of the present utility model is to adopt at the labyrinth strip realization of mounting circular ring shape on the partition body and the radial gland between impeller, so just needn't between partition body and impeller, carry out axial packing, can increase the axial clearance of partition body and impeller, make the steam turbine unit open, stop conveniently, operational flexibility, adapt to daily start-stop, possess peak modulation capacity.Simultaneously steam passage root Steam loss is significantly reduced, improved steam turbine set efficient effectively, and radial gland is simple in structure, assembly manipulation convenient.
(4) description of drawings
Fig. 1 is the axial gland seal structure schematic representation of existing steam passage root, and Fig. 2 is the utility model impulse steam turbine steam passage root radial gland structural representation.
Among the figure: 1 movable vane, 2 stator blades, 3 partition bodies, 4 impellers, 5 axial packings, 6 radial spill strips (labyrinth strip).
(5) embodiment
Provide embodiment of the present utility model below in conjunction with accompanying drawing.
Referring to Fig. 1, a kind of impulse steam turbine steam passage root radial gland comprises impeller 4, movable vane 1, partition body 3, stator blade 2, and movable vane 1 is equipped with at impeller 4 tops, and stator blade 2 is equipped with on partition body 3 tops, and 2 of movable vane 1 and stator blades form steam passage.Platform, table top and parallel to an axis that protrusion is arranged vertically at impeller 4 tops.One groove is arranged at partition body 3 tops, and the groove on the partition body 3 is corresponding with the protrusion platform at impeller 4 tops.Below partition body 3 grooves circular labyrinth strip 6 is housed radially, labyrinth strip can adopt the mode riveting jail towards riveting, and the gap between partition body 3 grooves and impeller 4 protrusion platforms is sealed.Impulse steam turbine steam passage root Steam loss will significantly reduce like this, improve steam turbine set efficient effectively, and radial gland is simple in structure, assembly manipulation convenient.
Claims (2)
1. impulse steam turbine steam passage root radial gland, comprise impeller, movable vane, partition body, stator blade, movable vane is equipped with at the impeller top, stator blade is equipped with on partition body top, form steam passage between movable vane and stator blade, it is characterized in that having vertically the platform of protrusion at the impeller top, table top and parallel to an axis, one groove is arranged at partition body top, groove on the partition body is corresponding with the protrusion platform at impeller top, circular labyrinth strip radially is housed below the partition body groove, the gap between partition body groove and impeller protrusion platform is sealed.
2. a kind of impulse steam turbine steam passage root radial gland according to claim 1 is characterized in that labyrinth strip and partition body are riveted fixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03279080 CN2649778Y (en) | 2003-09-29 | 2003-09-29 | Radical gland sealing of duct root for tangential steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03279080 CN2649778Y (en) | 2003-09-29 | 2003-09-29 | Radical gland sealing of duct root for tangential steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2649778Y true CN2649778Y (en) | 2004-10-20 |
Family
ID=34332251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03279080 Expired - Lifetime CN2649778Y (en) | 2003-09-29 | 2003-09-29 | Radical gland sealing of duct root for tangential steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2649778Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101749054A (en) * | 2010-01-21 | 2010-06-23 | 上海电气电站设备有限公司 | Turbine baffle seal structure and method thereof |
| CN101761362A (en) * | 2008-12-22 | 2010-06-30 | 通用电气公司 | Adaptive compliant plate seal assemblies and methods |
-
2003
- 2003-09-29 CN CN 03279080 patent/CN2649778Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101761362A (en) * | 2008-12-22 | 2010-06-30 | 通用电气公司 | Adaptive compliant plate seal assemblies and methods |
| CN101749054A (en) * | 2010-01-21 | 2010-06-23 | 上海电气电站设备有限公司 | Turbine baffle seal structure and method thereof |
| CN101749054B (en) * | 2010-01-21 | 2013-12-11 | 上海电气电站设备有限公司 | Turbine baffle seal method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI ELECTRIC POWER STATION EQUIPMENT CO. Free format text: FORMER OWNER: SHANGHAI TURBINE CO., LTD. Effective date: 20080509 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080509 Address after: No. 188, Chun Chun Road, Shanghai, Minhang: 201100 Patentee after: Shanghai Electric Station Equipment Co., Ltd. Address before: No. 333, Jiangchuan Road, Shanghai, Minhang District: 200240 Patentee before: Shanghai Steam Turbine Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130929 Granted publication date: 20041020 |