CN204060817U - One touches Shi Bulaideng brush steam seal - Google Patents
One touches Shi Bulaideng brush steam seal Download PDFInfo
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- CN204060817U CN204060817U CN201420492773.1U CN201420492773U CN204060817U CN 204060817 U CN204060817 U CN 204060817U CN 201420492773 U CN201420492773 U CN 201420492773U CN 204060817 U CN204060817 U CN 204060817U
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- steam seal
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model relates to one and touches Shi Bulaideng brush steam seal, and it comprises Bu Laideng structure, stage teeth structure and brush bar, it is characterized in that: be arranged at intervals with spiral compression spring at the circumferencial direction of packing; Brush bar is arranged in groove that steam seal ring is opened.The utility model has the advantage of: it is little that the utility model is not only embodied in the working clearance between packing and rotor, more mainly packing packing after cold and hot state repeatedly starts, without wearing and tearing, and remains that comparatively small―gap suture runs.Meanwhile, due to brush silk space having nonuniformity, the uniformity of steam incoming flow is destroyed, and form damping, and the utility model can stop leakage effectively, improves sealing effect.Brush silk is when colliding with rotor, and brush silk can elastic yield, and not easy to wear, also ensure that the safe operation of unit under small―gap suture even zero clearance, sealing effect is better.
Description
Technical field
The utility model belongs to the seal arrangement sealing system technical field of steam turbine, particularly relates to one and touches Shi Bulaideng brush steam seal.
Background technique
Brandon steam-glanding is as a kind of novel packing; similar to traditional comb packing; eliminate traditional packing back plate spring; install spiral compression spring additional at the circumferencial direction of packing, by the open configuration in stopping process and cross the closed state after critical speed of rotation effectively avoid the impact and rub of packing and rotor and make packing in unit running process all the time with the rotor minimally working clearance.So not only decrease gas leakage, and improve overall efficiency.Brush steam seal is using the brush tow of heat resistant and wear resistant as main seal and relies on its close-packed arrays produce damping to steam thus arrive sealing effect, it itself is contact-type zero clearance packing, can adapt to the moment radial motion of rotor and area is revealed in not permanent expansion, sealing effect is fine.
Bu Laideng and brush steam seal are combined, can play the advantage of packing in two, sealing effect is better, makes equipment run safety more economically.At present, the product combined about these two kinds of gland seal structures not yet relates to.
Summary of the invention
The purpose of this utility model be to overcome background technique deficiency and provide a kind of brandon steam-glanding and brush steam seal are combined and sealing effect touches Shi Bulaideng brush steam seal more significantly.
The technical solution of the utility model is:
One touches Shi Bulaideng brush steam seal, and it comprises Bu Laideng structure, stage teeth structure and brush bar, it is characterized in that: be arranged at intervals with four spiral compression springs at the circumferencial direction of packing; Brush bar is arranged in groove that steam seal ring is opened.
The utility model has the advantage of: it is little that the utility model is not only embodied in the working clearance between packing and rotor, more mainly packing packing after cold and hot state repeatedly starts, without wearing and tearing, and remains that comparatively small―gap suture runs.Meanwhile, due to the brush silk space on brush bar having nonuniformity, the uniformity of steam incoming flow is destroyed, and form damping, and the utility model can stop leakage effectively, improves sealing effect.Brush silk is when colliding with rotor, and brush silk can elastic yield, and not easy to wear, also ensure that the safe operation of unit under small―gap suture even zero clearance, sealing effect is better.
Accompanying drawing explanation
Fig. 1-1, Fig. 1-2 are that the utility model touches Shi Bulaideng brush steam seal ring schematic diagram.
Fig. 2 is that the utility model touches Shi Bulaideng brush steam seal spiral compression spring schematic diagram.
Fig. 3 is that the utility model touches Shi Bulaideng brush steam seal block side view.
Fig. 4 is that the utility model touches Shi Bulaideng brush steam seal block plan view.
Number in the figure is: 1-spiral compression spring, 2-brush bar, 3-stage tooth, 4-admission groove.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As shown in Figures 1 to 4, the utility model touches Shi Bulaideng brush steam seal, includes Bu Laideng structure, stage teeth structure and brush bar, is arranged at intervals with four spiral compression springs 1, and is provided with admission groove 4 at the circumferencial direction of packing; Brush bar 2 is arranged in groove that steam seal ring is opened.
Working procedure of the present utility model is:
After steam turbine starts, steam enters in cylinder, along with the increase of Turbine Flow Path steam inlet, the closing forces acting on packing segmental arc back overcomes opening force and the frictional force of the spiral compression spring 1 acting on packing flank, packing segment is closed gradually under the effect of closing forces, as shown in " a " in Fig. 1, and finally realizes the closedown of gland blocks, make stage tooth 3 reduce to minimum value with the radial clearance of rotor, and kept.When compressor emergency shutdown; because the steam flow entered is few; the corresponding steam flow entering packing segmental arc back also lacks; the closing forces acting on packing segmental arc back reduces; gland blocks, under the effect of the opening force of spiral compression spring 1, makes packing be in open configuration, away from rotor; stage tooth 3 and the radial clearance of rotor are kept larger state, as shown in " b " in Fig. 1.Like this; by opening and closing automatically of packing radian; achieve open at unit, the radial clearance of packing and rotor is adjustable in stopping process; avoid the impact and rub because vibration produces; in unit normally runs, the radial clearance of packing and rotor remains in less scope, i.e. the lower limit of design load.When steam flows through brush bar structure 2 simultaneously, have nonuniformity owing to brushing in brush bar in groove on silk space, the uniformity of steam incoming flow is destroyed, produce various flowing, form damping, make it produce larger whirlpool, thus brush bar 2 can stop leakage effectively, improve sealing effect.
Claims (2)
1. touch a Shi Bulaideng brush steam seal, it comprises Bu Laideng structure, stage teeth structure and brush bar, it is characterized in that: be arranged at intervals with spiral compression spring at the circumferencial direction of packing; Brush bar is arranged in groove that steam seal ring is opened.
2. according to claim 1ly touch Shi Bulaideng brush steam seal, it is characterized in that: be arranged at intervals with four spiral compression springs at the circumferencial direction of packing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420492773.1U CN204060817U (en) | 2014-08-28 | 2014-08-28 | One touches Shi Bulaideng brush steam seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420492773.1U CN204060817U (en) | 2014-08-28 | 2014-08-28 | One touches Shi Bulaideng brush steam seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204060817U true CN204060817U (en) | 2014-12-31 |
Family
ID=52202354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420492773.1U Active CN204060817U (en) | 2014-08-28 | 2014-08-28 | One touches Shi Bulaideng brush steam seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204060817U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105512419A (en) * | 2015-12-17 | 2016-04-20 | 东方电气集团东方汽轮机有限公司 | Self-sealing steam sealing action point setting method |
-
2014
- 2014-08-28 CN CN201420492773.1U patent/CN204060817U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105512419A (en) * | 2015-12-17 | 2016-04-20 | 东方电气集团东方汽轮机有限公司 | Self-sealing steam sealing action point setting method |
| CN105512419B (en) * | 2015-12-17 | 2018-10-16 | 东方电气集团东方汽轮机有限公司 | Self sealss packing operating point setting method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |