CN202866903U - Brush type honeycomb vapor seal - Google Patents
Brush type honeycomb vapor seal Download PDFInfo
- Publication number
- CN202866903U CN202866903U CN201220435359.8U CN201220435359U CN202866903U CN 202866903 U CN202866903 U CN 202866903U CN 201220435359 U CN201220435359 U CN 201220435359U CN 202866903 U CN202866903 U CN 202866903U
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- Prior art keywords
- brush
- seal
- honeycomb
- steam
- brush type
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Abstract
The utility model provides a brush type honeycomb vapor seal which comprises a vapor seal body which is provided with more than one honeycomb belts on the surface. The brush type honeycomb vapor seal is characterized in that a T-shaped groove is arranged on the vapor seal body and located between two adjacent honeycomb belts. A brush wire bunch is arranged in the T-shaped groove, and vortex seal of the honeycomb is combined with small-gap seal of the brush type seal so as to achieve a better seal effect. Efficiency of a steam turbine set is improved, and the purpose of energy preservation is achieved. Meanwhile, the brush wire bunch which is movable and detachable is utilized so that the overall seal block does not need replacing in maintenance, only brush wires need replacing, and the purpose of maintenance is achieved, and maintenance cost is reduced.
Description
Technical field
The utility model relates to a kind of packing, can be used as steam turbine axle head, dividing plate, movable vane top seal, belongs to the seal arrangement technical field.
Background technique
Packing is applied to steam turbine axle head, dividing plate, movable vane top, and its effect is to reduce steam leakage, reduces idle work, improves unit efficiency, reaches the purpose of energy-saving and emission-reduction.
At present, the packing of most types is serrate-type steam seal, and the mode by throttling expansion realizes the purpose that seals.Quantity and the seal clearance of this throttling expansion sealing means sealing effect and tooth are proportional.Be subjected to steam turbine body material and security limitations, sealing number of teeth amount can not increase.And the labyrinth clearance value is transferred to hour, easily produces friction with turbine shaft again, easily makes turbine rotor crooked and produce and vibrate, and affects unit safety.When the labyrinth clearance is larger, can cause again packing place steam leakage large, affect generatine set heat efficiency.
Honeycomb steam seal produces the convolution recoil by steam and forms eddy current realization sealing purpose in honeycomb hole.Compare with serrate-type steam seal, under the same conditions, the Honeycomb steam seal leakage rate is about 1/2 of serrate-type steam seal.But because honeycomb pore area rigidity is high, still be the rigid sealing means of can not making a concession, seal clearance can not diminish, otherwise also deposits the anxiety of safety.
Brush steam seal is made by thin alloy steel wire.Brush steam seal has preferably elasticity because the brush silk is thin, and seal clearance can be done very little, improves a lot than the serrate-type steam seal sealing effect.But brush-type gland-sealing brush wire silk fixedly conventional method is by being wrapped on the fixing silk, being fixed into one by support plate, clamping panel spot welding, then the brush combination body is embedded in the packing conduit, being integrated with the labyrinth casing riveting.This mode, in case the wearing and tearing of brush silk will all be changed by whole circle packing, maintenance cost is higher.And gapped between the brush silk, still have a large amount of steam leakages.
Summary of the invention
The purpose of this utility model is, overcomes the deficiency of background technique and a kind of packing that reduces steam leakage is provided.
In order to achieve the above object, the utility model provides a kind of brush Honeycomb steam seal, comprises that the surface is provided with the labyrinth casing of one or more cellular band, it is characterized in that described labyrinth casing is provided with the T connected in star, between two cellular bands of arbitrary neighborhood; Be provided with the brush tow in the T connected in star.
Described brush tow forms by brush tow matrix and by the brush silk of laser bonding on brush tow matrix.
Angle between described brush silk and the steam direct-axis is less than 90 °.
Preferably, the angle between described brush silk and the steam direct-axis is 45 °.
The utility model combines the sealing of the eddy current of Honeycomb steam seal and the little clearance seal of brush steam seal, reaches better sealing effect, improves the efficient of steam turbine set, reaches energy-conservation purpose.Simultaneously, application activity can be taken out the brush tow that unloads, and needn't change whole gland blocks during maintenance, need only substitute the brush tow and can realize maintenance purpose, reduces maintenance cost.
Description of drawings
Structural representation when the brush Honeycomb steam seal that Fig. 1 provides for the utility model is worked;
Fig. 2 is the structural representation of Honeycomb steam seal in the utility model;
Fig. 3 is the partial enlarged drawing of cellular band in the utility model;
Fig. 4 is the structural representation of brush tow in the utility model;
Air-flow moved towards schematic representation when Fig. 5 was the utility model work;
Fig. 6 is the sectional view at brush tow place among Fig. 1.
Among the figure:
1, steam direct-axis; 2, cellular band;
3, brush silk; 4, brush tow matrix;
5, T connected in star; 6, labyrinth casing.
Embodiment
For the utility model is become apparent, hereby with preferred embodiment, and cooperate accompanying drawing to be described in detail below.
Embodiment
Shown in Fig. 1-6, the structural representation of the brush Honeycomb steam seal that provides for the utility model comprises the Honeycomb steam seal that 4 cellular bands 2 of being located on the labyrinth casing 6 form, and brush silk 3 and brush tow matrix 4 are by laser bonding all-in-one-piece brush tow.On the labyrinth casing 6, be provided with T connected in star 5 between middle two cellular bands 2, the brush tow inserts in the T connected in star 5.Because by the laser bonding mode, the brush silk 3 on the brush tow a phenomenon can not occur falling.
In the utility model when work,, steam direct-axis 1 as the direction of arrow among Fig. 5 flow, and when in the honeycomb hole that enters cellular band 2, the formation rotating vortex forms powerful damping to rear portion steam; And then be 0 brush tow by the gap, damping is further strengthened, and leaks further to reduce.If steam direct-axis 1 with brush silk 3 grazing occurs, because brush silk 3 tilts 45 ° with respect to axle, then brush silk 3 bends, and dodges steam direct-axis 1, reduces friction.
Claims (4)
1. a brush Honeycomb steam seal comprises that the surface is provided with the labyrinth casing of one or more cellular band (2) (6), it is characterized in that described labyrinth casing (6) is provided with T connected in star (5), is positioned between two cellular bands of arbitrary neighborhood (2); The T connected in star is provided with the brush tow in (5).
2. brush Honeycomb steam seal as claimed in claim 1 is characterized in that, described brush tow forms by brush tow matrix (4) and by the brush silk (3) of laser bonding on brush tow matrix (4).
3. brush Honeycomb steam seal as claimed in claim 2 is characterized in that, the angle between described brush silk (3) and the steam direct-axis (1) is less than 90 °.
4. brush Honeycomb steam seal as claimed in claim 3 is characterized in that, the angle between described brush silk (3) and the steam direct-axis (1) is 45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220435359.8U CN202866903U (en) | 2012-08-29 | 2012-08-29 | Brush type honeycomb vapor seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220435359.8U CN202866903U (en) | 2012-08-29 | 2012-08-29 | Brush type honeycomb vapor seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202866903U true CN202866903U (en) | 2013-04-10 |
Family
ID=48033628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220435359.8U Expired - Lifetime CN202866903U (en) | 2012-08-29 | 2012-08-29 | Brush type honeycomb vapor seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202866903U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603696A (en) * | 2013-09-09 | 2014-02-26 | 张建华 | Novel Brandon brush steam seal |
| 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 |
-
2012
- 2012-08-29 CN CN201220435359.8U patent/CN202866903U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603696A (en) * | 2013-09-09 | 2014-02-26 | 张建华 | Novel Brandon brush steam seal |
| 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 |
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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: 20130410 |