CN207728398U - Reverse pressurization sealing gland - Google Patents
Reverse pressurization sealing gland Download PDFInfo
- Publication number
- CN207728398U CN207728398U CN201721922192.7U CN201721922192U CN207728398U CN 207728398 U CN207728398 U CN 207728398U CN 201721922192 U CN201721922192 U CN 201721922192U CN 207728398 U CN207728398 U CN 207728398U
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- Prior art keywords
- labyrinth
- shaft
- gland
- several
- steam turbine
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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.)
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model discloses a kind of reverse pressurization sealing glands, belong to packing apparatus field, it is characterized in that, fixed several labyrinth strips on the inside of labyrinth casing, several labyrinth casings are fixed in the shaft of steam turbine, several fan blades are arranged in the labyrinth casing outer end, and fan blade is fastened around in the shaft of steam turbine, leaking gas conduit is equipped between labyrinth casing, leaking gas conduit connects gland-sealing cooler.The steam that sealing gland leaks out can be drawn out to gland-sealing cooler safely by the utility model, and have the characteristics of simple in structure, to improve efficiency, reduce cost.
Description
Technical field
The utility model is related to a kind of reverse pressurization sealing glands, belong to packing apparatus field.
Background technology
Packing is installed between steam turbine (dead axle and shaft two parts composition) dynamic and static part, and steam is reduced or prevent
It leaks and device that inlet side air is leak into.Steam turbine has dead axle and shaft two large divisions, at work shaft high speed rotation, fixed
Axis is fixed, therefore certain gap must be kept between shaft and dead axle, does not make phase mutual friction.Steam flows through steam turbine works at different levels
When making, sub-fraction can be flowed through from various gaps without doing work, and become a kind of loss, reduced the efficiency of unit.For height
The front end at air cylinder both ends and intermediate cylinder, the steam pressure in cylinder are more than external atmospheric pressure, will there is steam leakage herein
Come, reduces unit efficiency, and cause partial coagulation water loss.In order to reduce the gas leakage in above-mentioned gap everywhere, ensure again
Steam turbine normal safe operation is provided with various packings.These packings can be divided into flow passage component packing, diaphragm gland and shaft end vapour
Inside back cover major class.
In traditional sealing gland, packing has the feelings that leakage vapour escapes to outside, even leaks into bearing housing and pollute oil
Condition occurs, it is however generally that this part leakage vapour needs to use the equipment such as stream-jet ejector or axle envelope exhaust fan and could draw its safety
Go out.
Utility model content
The utility model aim is to provide a kind of reverse pressurization sealing gland, the steam peace that can leak out sealing gland
It is complete to be drawn out to gland-sealing cooler, and there is the characteristics of simple in structure, to improve efficiency, reduce cost.To solve the above problems, this
Utility model provides a kind of reverse pressurization sealing gland, which is characterized in that fixed several labyrinth strips, several vapour on the inside of labyrinth casing
Envelope body is fixed in the shaft of steam turbine, several fan blades are arranged in the labyrinth casing outer end, and fan blade is fastened around steam turbine
In shaft, leaking gas conduit is equipped between labyrinth casing, leaking gas conduit connects gland-sealing cooler.
Preferably, the fan blade is centrifugation or shaft flow blade.
Preferably, the fan blade is at least one.
The utility model advantageous effect：
The utility model fan blade is rotated with rotating shaft of steam turbine, is generated an inside wind pressure to prevent steam from flowing out, is made
The steam finally leaked out flows into gland-sealing cooler with micro-positive pressure, has prevented leakage vapour and has escaped to outside, even leaks into bearing housing and dirty
The situation of dye oil occurs, and greatly reduces security risk, simplifies gland seal structure and reduce cost.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
Wherein：1, shaft；2, fan blade；3, labyrinth casing；4, labyrinth strip；5, gland-sealing cooler；6, leaking gas conduit.
Specific implementation mode
Embodiment 1：
With reference to Figure of description, the utility model provides a kind of reverse pressurization sealing gland, which is characterized in that labyrinth casing 3
Several labyrinth strips 4 are fixed in inside, several labyrinth casings 3 are fixed in the shaft 1 of steam turbine, if 3 outer end of the labyrinth casing is arranged
Dry-air blast leaf 2, fan blade 2 are shaft flow blade, and fan blade 2 is equipped with gas leakage in the shaft 1 of fixed steam turbine between labyrinth casing 3
Pipeline 6, leaking gas conduit 6 connect gland-sealing cooler 5.
When work：Fan blade 2 is rotated together with the shaft 1 of steam turbine, and blades push air is flowed with direction identical with axis,
Generating inside wind pressure prevents steam from flowing out, and the steam of leakage is made finally to be flowed into leaking gas conduit 6 with guiding, then into
Enter gland-sealing cooler 5, has prevented to leak the situation generation that vapour escapes to outside, even leaks into bearing housing and pollute oil, drop significantly
Low security risk simplifies gland seal structure and reduces cost.
Claims (3)
1. a kind of reverse pressurization sealing gland, which is characterized in that fixed several labyrinth strips (4), several vapour on the inside of labyrinth casing (3)
Envelope body (3) is fixed in the shaft (1) of steam turbine, several fan blades (2) are arranged in labyrinth casing (3) outer end, and fan blade (2) is surround
It is fixed in the shaft (1) of steam turbine, leaking gas conduit (6) is equipped between labyrinth casing (3), leaking gas conduit (6) connects packing cooling
Device (5).
2. a kind of reverse pressurization sealing gland according to claim 1, which is characterized in that the fan blade (2) is centrifugation
Or shaft flow blade.
3. a kind of reverse pressurization sealing gland according to claim 1, which is characterized in that the fan blade (2) is at least one
It is a.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721922192.7U CN207728398U (en) | 2017-12-29 | 2017-12-29 | Reverse pressurization sealing gland |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721922192.7U CN207728398U (en) | 2017-12-29 | 2017-12-29 | Reverse pressurization sealing gland |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207728398U true CN207728398U (en) | 2018-08-14 |
Family
ID=63084514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721922192.7U Active CN207728398U (en) | 2017-12-29 | 2017-12-29 | Reverse pressurization sealing gland |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207728398U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826673A (en) * | 2019-02-28 | 2019-05-31 | 山东赫德能源科技有限公司 | A kind of structure preventing water inlet and oil leak in steam turbine oil |
-
2017
- 2017-12-29 CN CN201721922192.7U patent/CN207728398U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826673A (en) * | 2019-02-28 | 2019-05-31 | 山东赫德能源科技有限公司 | A kind of structure preventing water inlet and oil leak in steam turbine oil |
| CN109826673B (en) * | 2019-02-28 | 2021-04-06 | 山东赫德能源科技有限公司 | Structure for preventing water from entering and oil from leaking from steam turbine oil |
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