CN202500615U - Sealing gland casing of steam turbine - Google Patents
Sealing gland casing of steam turbine Download PDFInfo
- Publication number
- CN202500615U CN202500615U CN2011202984539U CN201120298453U CN202500615U CN 202500615 U CN202500615 U CN 202500615U CN 2011202984539 U CN2011202984539 U CN 2011202984539U CN 201120298453 U CN201120298453 U CN 201120298453U CN 202500615 U CN202500615 U CN 202500615U
- Authority
- CN
- China
- Prior art keywords
- brush
- sealing
- gland casing
- labyrinth casing
- steam
- 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
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model discloses a sealing gland casing of a steam turbine. The sealing gland casing comprises a gland casing body, a honeycomb seal, a set bolt, a front baffle plate, brush wires, a rear baffle plate, and a high sealing tooth. The honeycomb seal is welded in an inner circle of the gland casing body. The height of the honeycomb seal is same with the height of a low sealing tooth. The front baffle plate, the brush wires and the rear baffle plate constitute a brush sealing strip. The height of the front baffle plate is same with the height of the plane of the honeycomb seal. The brush wires are supported by the high sealing tooth. The brush sealing strip is embedded in a groove of the gland casing body and is fixed by the set bolt on a side face of the gland casing body. By arranging the honeycomb seal and the brush-type seal on the gland casing body, the interstage steam leakage loss of the steam turbine can be reduced effectively and the problem of low efficiency due to the steam leakage of the steam turbine can be solved. As the brush sealing strip is fixed in the groove of the gland casing body through the bolt, the brush sealing strip can be replaced conveniently. The gland casing is especially suitable for being used in high-pressure steam turbines. The gland casing adopts multiple types of novel sealing modes and has better effects on reducing the steam leakage.
Description
Technical field
The utility model relates to a kind of labyrinth casing, relates in particular to a kind of sealing that is applied to steam turbine sound position and uses labyrinth casing
Background technique
At present, the packing that is applied to steam turbine is for dredging tooth-like labyrinth casing, and this packing is hard tooth-like labyrinth casing, its with the steam turbine radial clearance hour, be prone to produce and rub with turbine shaft, cause Steam Turbine Vibration; When itself and steam turbine radial clearance are big, make and leak leakage quantity between stage and increase, reduce the thermal efficiency of steam turbine.
The model utility content
For the deficiency in addressing the above problem, the utility model provides a kind of steam turbine sealing to use labyrinth casing.
For solving above technical problem; The technological scheme that the utility model adopts is: labyrinth casing is used in a kind of steam turbine sealing; Comprise labyrinth casing, Honeycomb steam seal, tight fixed bolt, front screen, brush silk, backboard, high gland sealing gear; It is characterized in that: said Honeycomb steam seal is welded on the inner circle of labyrinth casing, and its height is identical with low gland sealing gear height; Front screen, brush silk, backboard are formed the brush strip of paper used for sealing; The height of front screen is identical with the plane of Honeycomb steam seal; The brush silk is supported by high gland sealing gear.
Be inlaid with the brush strip of paper used for sealing in the groove of labyrinth casing, and fix with the tight fixed bolt of labyrinth casing side.
The direction of brush silk and the radial direction in the center of circle are one 30 °～60 ° angle, and the true dip direction of brush silk is identical with the turbine shaft sense of rotation.
The split of labyrinth casing is 30 °～60 ° angle.
The utility model is provided with Honeycomb steam seal, brush steam seal through labyrinth casing, can reduce the interstage leakage loss of steam turbine effectively, has solved the low problem of efficient that steam turbine causes because of leaking vapour.Because the brush strip of paper used for sealing can be changed through in the groove that is bolted to labyrinth casing easily.This novel being particularly useful in the high-pressure turbine, sealing adopts multiple novel seal form, and it is better to reduce the effect of leaking vapour.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation.
Fig. 1 is the structure sectional view of the utility model application site.
Fig. 2 is the brush strip of paper used for sealing plan view of the utility model.
Fig. 3 is the plan view of the utility model.
Fig. 4 is the part-structure sectional view of the utility model.
Fig. 5 is the structure sectional view of the utility model
Embodiment
As shown in Figure 1, the high gland sealing gear 8 that shows labyrinth casing 1 among the figure, goes out in labyrinth casing 1 turning, low gland sealing gear 9, turbine shaft 10.Wherein, the high gland sealing gear 8 of labyrinth casing 1, low gland sealing gear 9 respectively with turbine shaft 10 and on the boss place be provided with radial clearance " H ".
High gland sealing gear 8 respectively with turbine shaft 10, low gland sealing gear 9 and the boss on the turbine shaft 10 form the steam medium runner in less gap respectively, are the tooth-like packing form of dredging.
Like Fig. 2, Fig. 4, shown in Figure 1, brush silk 5 is fixed on the neutral position of front screen 4, backboard 6.The direction of brush silk 5 and the radial direction in the center of circle are an angle " α ", and the angle of α is 30 °～60 °, and the true dip direction of brush silk is identical with turbine shaft 10 sense of rotation.
As shown in Figure 3, the split of labyrinth casing 1 also is " α 1 ", and the angle of α 1 is 30 °～60 °, and is promptly consistent with the true dip direction of brush silk.3 is tight fixed bolt.
Like Fig. 4, shown in Figure 1, show labyrinth casing 1, Honeycomb steam seal 2, tight fixed bolt 3, front screen 4, brush silk 5, backboard 6, high gland sealing gear 8 among Fig. 4.Honeycomb steam seal 2 is welded on the promptly low tooth position of inner circle of labyrinth casing 1, and its height is highly identical with low gland sealing gear 9.The brush strip of paper used for sealing that front screen 4, brush silk 5, backboard 6 are formed is embedded in the groove of labyrinth casing 1, and is fastening with the tight fixed bolt 3 of labyrinth casing 1 side.The height of front screen 4 is identical with the plane of Honeycomb steam seal 2.High gland sealing gear 7 also has the effect of supporting brush silk 5.
Fig. 5 is the structure sectional view of the utility model, the part-structure sectional view promptly shown in Figure 4 and the scheme of installation of turbine shaft.The high gland sealing gear of labyrinth casing and the radial clearance of turbine shaft are that the Honeycomb steam seal of " H ", labyrinth casing and the radial clearance of turbine shaft are that the brush silk of " H ", labyrinth casing and the radial clearance of turbine shaft are " B "." B " value be about " H " value 30%～70% promptly brush silk and the radial clearance of turbine shaft are less than the radial clearance of high gland sealing gear and turbine shaft.
The labyrinth casing working procedure: steam is when the radial clearance " H " of the Honeycomb steam seal and the turbine shaft of the labyrinth casing of flowing through, and steam produces vortex in getting into the honeycomb lattice one by one the time, and the friction local resistance is increased, and has reduced steam leakage.Steam is when flowing through the radial clearance " B " of labyrinth casing brush silk and turbine shaft; Steam produces bias current when flowing through the brush silk, bias current forms concurrent and jet gradually between brush silk row, and produces secondary flow and swirling flow; The overall presure drop of steam is increased, thereby reduce the leakage rate of steam.
Claims (4)
1. labyrinth casing is used in a steam turbine sealing, comprises labyrinth casing, Honeycomb steam seal, tight fixed bolt, front screen, brush silk, backboard, high gland sealing gear, and it is characterized in that: said Honeycomb steam seal is welded on the inner circle of labyrinth casing, and its height is identical with low gland sealing gear height; Front screen, brush silk, backboard are formed the brush strip of paper used for sealing; The height of front screen is identical with the plane of Honeycomb steam seal; The brush silk is supported by high gland sealing gear.
2. labyrinth casing is used in steam turbine sealing according to claim 1, it is characterized in that: be inlaid with the brush strip of paper used for sealing in the groove of said labyrinth casing, and fix with the tight fixed bolt of labyrinth casing side.
3. labyrinth casing is used in steam turbine sealing according to claim 1, it is characterized in that: the direction of said brush silk and the radial direction in the center of circle are one 30 °～60 ° angle, and the true dip direction of brush silk is identical with the turbine shaft sense of rotation.
4. labyrinth casing is used in steam turbine sealing according to claim 1, and it is characterized in that: the split of said labyrinth casing is 30 °～60 ° angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202984539U CN202500615U (en) | 2011-08-17 | 2011-08-17 | Sealing gland casing of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202984539U CN202500615U (en) | 2011-08-17 | 2011-08-17 | Sealing gland casing of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202500615U true CN202500615U (en) | 2012-10-24 |
Family
ID=47037230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202984539U Expired - Fee Related CN202500615U (en) | 2011-08-17 | 2011-08-17 | Sealing gland casing of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202500615U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603696A (en) * | 2013-09-09 | 2014-02-26 | 张建华 | Novel Brandon brush steam seal |
-
2011
- 2011-08-17 CN CN2011202984539U patent/CN202500615U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603696A (en) * | 2013-09-09 | 2014-02-26 | 张建华 | Novel Brandon brush steam seal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100068 Beijing Haidian District City West Village in eight East Building No. 69 103 Patentee after: Beijing Huifeng Renhe Science & Technology Co., Ltd. Address before: 100068 Beijing Haidian District City West Village in eight East Building No. 69 103 Patentee before: Beijing Huifeng Renhe Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121024 Termination date: 20170817 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| DD01 | Delivery of document by public notice |
Addressee: Long Xuebin Document name: Notification of Termination of Patent Right |
|
| DD01 | Delivery of document by public notice |