CN201991572U - Labyrinth gland with combined main teeth, side teeth and honeycomb belt - Google Patents
Labyrinth gland with combined main teeth, side teeth and honeycomb belt Download PDFInfo
- Publication number
- CN201991572U CN201991572U CN2011200271306U CN201120027130U CN201991572U CN 201991572 U CN201991572 U CN 201991572U CN 2011200271306 U CN2011200271306 U CN 2011200271306U CN 201120027130 U CN201120027130 U CN 201120027130U CN 201991572 U CN201991572 U CN 201991572U
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- China
- Prior art keywords
- teeth
- tooth
- gland
- packing
- rotor
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- 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)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model provides a labyrinth gland with combined main teeth, side teeth and a honeycomb belt for a turbine, which comprises a gland ring body, radial gland main teeth and the honeycomb belt are alternated with each other and arranged on an inner hole surface of the gland ring body, the radial grand main teeth are in clearance match with a rotor groove, and the honeycomb belt is in clearance match with a rotor boss. A steam inlet side teeth surface of the gland main teeth is provided with at least one line of annular side teeth arranged in an axial direction, and at least one line of groove bottom teeth arranged in the radial direction is arranged between the gland main teeth and the honeycomb belt. Tooth tops with thickness ranging from 0.2mm to 0.3mm are formed by reducing thickness of the back-steam sides of the teeth of the matching end of the gland main teeth and the rotor. The labyrinth gland has good steam-proof effect and is capable of ensuring safe and economical operation of a turbine set.
Description
Technical field
The utility model relates to turbine rotor packing parts, is specifically related to a kind of master, side tooth and cellular band combined labyrinth packing.
Background technique
At present, broach packing and Honeycomb steam seal are generally adopted in the sealing of domestic power plant steam turbine rotor.The broach packing is to process radially gland sealing gear in packing ring body inner hole surface, and gland sealing gear and epitrochanterian boss and groove Spielpassung constitute the labyrinth, and air-flow is throttling expansion in the labyrinth, and air pressure is subdued, and reaches the purpose of resistance vapour.Because hinder the vapour weak effect, when overhaul of steam turbine, be replaced by the packing of other structural type mostly.Honeycomb steam seal is on the basis of former broach packing, with the low tooth part replacement of packing is honeycomb, has been equivalent to increase the quantity of low tooth, and by the special construction of cellular band, the axial flow that can not only stop steam can also stop the rotational flow of steam with rotor, and resistance vapour effect is better than the broach packing.But the Honeycomb steam seal of on broach packing basis, transforming of prior art, the steam expansion space is dwindled, and the soldering of the cellular band of relatively large area processing, the distortion that has increased the packing ring body, cause both sides radial clearance and circumferential clearance not to wait easily, the effect of the whole resistance of influence vapour.In addition, at present the packing crown thickness size of broach packing is relatively large, when packing and rotor occurring and bump mill, easily causes the damage of rotor, influence the normal operation of steam turbine, also is the major issue that packing design need solution.
Summary of the invention
The purpose of this utility model is at the problems referred to above, and a kind of master, side tooth and cellular band combined labyrinth packing with good resistance vapour effect is provided.
The purpose of this utility model also is to improve by the structure to gland sealing gear, causes the problem of rotor damage when bumping mill with effective solution packing and rotor.
The technological scheme that realizes above-mentioned purpose is: a kind of master, side tooth and cellular band combined labyrinth packing, it includes the packing ring body, on the inner hole surface of this packing ring body alternate be provided with the radial gland master tooth of rotor recesses Spielpassung and with the cellular band of rotor boss Spielpassung, the steam admission side flank of tooth of described packing master tooth is provided with at least one axial annular side tooth, tooth packing master tooth is provided with at least radial slot between cellular band at the bottom of.
The technical solution of the utility model also comprises: the denticle back of the body vapour side attenuate of described packing master tooth and rotor abutting end, forming thickness is the crown of 0.2mm～0.3mm.
The utility model adopts packing master tooth and cellular band combination with side tooth to form the labyrinth gland structure, and the position soldering cellular band that is cooperating with the rotor boss only, when guaranteeing the cellular band sealing effect, saved the cellular band material, reduced the distortion of packing ring body in the brazing process, and strengthened the steam expansion space, its packing master tooth, side tooth, bottom land tooth cooperate the labyrinth gland structure that forms with cellular band, have good resistance vapour effect.
The utility model adopts the gland sealing gear crown structure of little thickness size, can be adjusted into littler radially assemblage gap during installation, even if bump mill with rotor, also can not cause damage to rotor, when guaranteeing the normal operation of unit, improves the packing effect.
Description of drawings
Accompanying drawing is this master, side tooth and cellular band combined labyrinth packing schematic representation.
Embodiment
In conjunction with the accompanying drawings embodiment of the present utility model is described.
As accompanying drawing, this master, side tooth and cellular band combined labyrinth packing include packing ring body 1, on the inner hole surface of this packing ring body 1 alternate be provided with the radial gland master tooth 2 of rotor recesses Spielpassung and with the cellular band 3 of rotor boss Spielpassung, the steam admission side flank of tooth of each packing master tooth 2 is provided with at least one axial annular side tooth 4, tooth 5 packing master tooth 2 is provided with at least radial slot between cellular band 3 at the bottom of.
Honeycomb belt carcass lattice of the present utility model are regular hexagon, and the core checkerwork cell is towards rotor.
The utility model packing master tooth 2 is carried on the back vapour side attenuate with the denticle of rotor abutting end, and forming thickness b is the crown of 0.2mm～0.3mm.
Working state after the utility model is installed is:
1, steam is from the steam admission side vapour side flow that supports or opposes, and through the throttle clearance between main tooth and the rotor, steam flow reduces;
2, steam enters the expansion chamber expansion, and vapor pressure descends, and continues the formation eddy current that flows in expansion chamber, steam internal resistance increase, and flow velocity slows down;
3, the steam of Jian Suing is divided into more tiny eddy current by honeycomb belt carcass lattice, forms the selfsealings steam zone in rotor periphery;
4, the flowing steam that enters in next expansion chamber through cellular band is run into side tooth and bottom land tooth, is forced to turn to, and has increased eddy current quantity, and the steam internal resistance further increases, and flow velocity slows down more;
5, continued to flow by the steam of throttling step-down, after through several throttle clearance and expansion chamber, vapor pressure is reduced to the designing requirement value, reaches desirable sealing effect.
Claims (2)
1. a master, side tooth and cellular band combined labyrinth packing, include packing ring body (1), it is characterized in that: on the inner hole surface of this packing ring body (1) alternate be provided with the radial gland master tooth (2) of rotor recesses Spielpassung and with the cellular band (3) of rotor boss Spielpassung, the steam admission side flank of tooth of described packing master tooth (2) is provided with at least one axial annular side tooth (4), tooth (5) packing master tooth (2) is provided with at least radial slot between cellular band (3) at the bottom of.
2. master according to claim 1, side tooth and cellular band combined labyrinth packing is characterized in that: described packing master tooth (2) is carried on the back vapour side attenuate with the denticle of rotor abutting end, and forming thickness is the crown of 0.2mm～0.3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200271306U CN201991572U (en) | 2011-01-27 | 2011-01-27 | Labyrinth gland with combined main teeth, side teeth and honeycomb belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200271306U CN201991572U (en) | 2011-01-27 | 2011-01-27 | Labyrinth gland with combined main teeth, side teeth and honeycomb belt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201991572U true CN201991572U (en) | 2011-09-28 |
Family
ID=44668062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200271306U Expired - Lifetime CN201991572U (en) | 2011-01-27 | 2011-01-27 | Labyrinth gland with combined main teeth, side teeth and honeycomb belt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201991572U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102953771A (en) * | 2012-11-16 | 2013-03-06 | 西安交通大学 | Labyrinth damping sealing device with low leakage and high damping performance |
| CN105934615A (en) * | 2013-12-03 | 2016-09-07 | 三菱日立电力系统株式会社 | Seal structure and rotary machine |
| KR101695126B1 (en) * | 2016-01-15 | 2017-01-10 | 두산중공업 주식회사 | Structure for reinforcing a turbine's sealing by using bump-shape |
| CN114151142A (en) * | 2021-11-11 | 2022-03-08 | 中国联合重型燃气轮机技术有限公司 | Seal assembly and gas turbine |
-
2011
- 2011-01-27 CN CN2011200271306U patent/CN201991572U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102953771A (en) * | 2012-11-16 | 2013-03-06 | 西安交通大学 | Labyrinth damping sealing device with low leakage and high damping performance |
| CN105934615A (en) * | 2013-12-03 | 2016-09-07 | 三菱日立电力系统株式会社 | Seal structure and rotary machine |
| CN105934615B (en) * | 2013-12-03 | 2021-06-18 | 三菱动力株式会社 | Sealing structure and rotary machine |
| KR101695126B1 (en) * | 2016-01-15 | 2017-01-10 | 두산중공업 주식회사 | Structure for reinforcing a turbine's sealing by using bump-shape |
| CN114151142A (en) * | 2021-11-11 | 2022-03-08 | 中国联合重型燃气轮机技术有限公司 | Seal assembly and gas turbine |
| CN114151142B (en) * | 2021-11-11 | 2023-09-01 | 中国联合重型燃气轮机技术有限公司 | Seal assembly and gas turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110928 |