CN2191280Y - Brush type steam sealing for steam turbine or gas turbine - Google Patents
Brush type steam sealing for steam turbine or gas turbine Download PDFInfo
- Publication number
- CN2191280Y CN2191280Y CN 94212453 CN94212453U CN2191280Y CN 2191280 Y CN2191280 Y CN 2191280Y CN 94212453 CN94212453 CN 94212453 CN 94212453 U CN94212453 U CN 94212453U CN 2191280 Y CN2191280 Y CN 2191280Y
- Authority
- CN
- China
- Prior art keywords
- steam
- steam sealing
- brush
- turbine
- packing
- 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)
- Sealing Devices (AREA)
Abstract
The utility model relates to labyrinth steam sealing for steam turbines or gas turbines, which is composed of stators and rotors, wherein, the upper half parts and the lower half parts of the stators are provided with grooves; steam sealing rings are arranged in the grooves; the circumferential directions of the inner rings of the steam sealing rings are provided with steam sealing ring grooves; steam sealing brushes are arranged in the steam sealing ring grooves and are composed of a plurality of metal wires of which one end is fixed. The utility model has the advantages of simple structure and convenient installation, maintenance and replacement. Positive pressure between the steam sealing brushes and the rotors is not strong. When the utility model is in friction, a large amount of heat is difficult to generate, and the leakage quantity of working mediums is one fourth to twentieth that of a commonly used labyrinth steam sealing.
Description
The utility model relates to the labyrinth gland of a kind of steam turbine, gas turbine.
At present, the junction point of steam turbine, gas turbine upper rotor part and stator uses labyrinth gland to prevent the leakage of working medium usually.This packing is separated out by the high and low pressure of some labyrinth strips that certain distance arranged each other with working medium; These labyrinth strips play throttling action to the working medium of leaking." adjustable clearance packing " structure of GE's design is disclosed in China's " power generating equipment " second phase nineteen ninety, " the manufacturing management tactics of the eighties U.S. steam turbine " literary composition.The gap of this gland seal structure is adjustable, and unit shutdown process intermediate gap is bigger, and the labyrinth clearance is less during the set steady operation.Japan " レ of Toshiba PVC ユ one " 1990, VOL, 45, " active clearance control system " disclosed among the NO7.Above-mentioned two kinds of gland seal structure better performances have obtained tangible economic benefit.Yet their gland seal structure is all very complicated, and its processing, installation, maintenance, replacing are all very inconvenient, and both inconvenience was used for the design of new unit, should not be used for the transformation at the labour unit again.
It is a kind of simple in structure that the purpose of this utility model is to provide, and can allow the labyrinth clearance to reduce, and do not reduce to reduce the steam turbine of the Security of unit, the brush formula packing of gas turbine because of the labyrinth clearance again.
For achieving the above object, the utility model provides the brush formula packing of a kind of steam turbine, gas turbine.It is characterized in that on upper half part of stator and lower half portion groove being set, place steam seal ring in groove, that encircles in steam seal ring circumferentially has a steam seal ring groove, and the packing brush is housed in the steam seal ring groove.
The advantage of the brush formula packing of the utility model steam turbine, gas turbine is that (1) is simple in structure, installation, maintenance, replacing packing brush are convenient; (2) labyrinth clearance reduces and does not destroy again the Security of unit; (3) positive pressure is little, difficult when rubbing between packing brush and the rotor produces a large amount of heat, thereby rotor is not fragile, so complete machine is difficult for having an accident; (4) brush formula packing reduces the refrigerant leakage amount, is 1/4～1/20 of the leakage rate of normally used labyrinth gland.
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
Fig. 1 is the vertical profile schematic representation of the brush formula packing of the utility model steam turbine, gas turbine.
Fig. 2 is a packing brush schematic representation of the present utility model.
As seen from Figure 1, Figure 2, the utility model has adopted the brush formula packing of a kind of steam turbine, gas turbine, on the first half of stator 1 and lower half portion, groove 4 is set, in groove 4, place steam seal ring 8, in steam seal ring 8 ring circumferentially have a steam seal ring groove 2,5,9, packing brush 18,15,12 is housed in steam seal ring groove 2,5,9.
Said packing brush the 18,15, the 12nd is made up of many one metal wires 7 that an end fixes as one, and is fixed tightly in the groove 2,5,9 by cushion block 20,17,13 and chock 3,6,10.The gap that wire 7 on the packing brush 18,15,12 and rotor are 11 is obtained littler than common labyrinth gland, thereby little by the refrigerant leakage amount of brush packing 18,15,12.Because wire has elasticity, have an accident so make rotor wear even when rotor 11 and packing brush 18,15,12 are collided, also can not produce a large amount of heat.
In order to increase the rigidity of packing brush 18,15,12 opposing working medium axial pressures, support plate 19,16,14 is arranged in the low voltage side of packing brush 18,15,12.The wire 7 of packing brush is a finer wire in this device, and their end is fixing by welding.
Claims (2)
1, the brush formula packing of a kind of steam turbine, gas turbine, form by stator and rotor, it is characterized in that: on upper half part of stator and lower half portion, groove is set, in groove, place steam seal ring, that encircles in steam seal ring circumferentially has a steam seal ring groove, and the packing brush is housed in the steam seal ring groove.
2, the brush formula packing of steam turbine according to claim 1, gas turbine is characterized in that: the packing brush is made up of the fixing wire of an end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94212453 CN2191280Y (en) | 1994-05-20 | 1994-05-20 | Brush type steam sealing for steam turbine or gas turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94212453 CN2191280Y (en) | 1994-05-20 | 1994-05-20 | Brush type steam sealing for steam turbine or gas turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2191280Y true CN2191280Y (en) | 1995-03-08 |
Family
ID=33829299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94212453 Expired - Lifetime CN2191280Y (en) | 1994-05-20 | 1994-05-20 | Brush type steam sealing for steam turbine or gas turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2191280Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926972A (en) * | 2011-08-08 | 2013-02-13 | 通用电气公司 | Seal assembly and method for flowing hot gas in a turbine |
| CN104153826A (en) * | 2014-07-28 | 2014-11-19 | 江苏透平密封高科技有限公司 | Flow-shielding brush-type steam seal |
| CN107614948A (en) * | 2015-06-03 | 2018-01-19 | 三菱日立电力系统株式会社 | Sealing device and rotating machinery |
-
1994
- 1994-05-20 CN CN 94212453 patent/CN2191280Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926972A (en) * | 2011-08-08 | 2013-02-13 | 通用电气公司 | Seal assembly and method for flowing hot gas in a turbine |
| CN104153826A (en) * | 2014-07-28 | 2014-11-19 | 江苏透平密封高科技有限公司 | Flow-shielding brush-type steam seal |
| CN107614948A (en) * | 2015-06-03 | 2018-01-19 | 三菱日立电力系统株式会社 | Sealing device and rotating machinery |
| CN107614948B (en) * | 2015-06-03 | 2020-04-07 | 三菱日立电力系统株式会社 | Sealing device and rotary machine |
| US10954808B2 (en) | 2015-06-03 | 2021-03-23 | Mitsubishi Power, Ltd. | Sealing device and rotary machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |