CN209163878U - A kind of high helical teeth packing of comb teeth - Google Patents
A kind of high helical teeth packing of comb teeth Download PDFInfo
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- CN209163878U CN209163878U CN201820292235.6U CN201820292235U CN209163878U CN 209163878 U CN209163878 U CN 209163878U CN 201820292235 U CN201820292235 U CN 201820292235U CN 209163878 U CN209163878 U CN 209163878U
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- tooth
- teeth
- packing
- high tooth
- beveled tip
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Abstract
The utility model discloses a kind of high helical teeth packings of comb teeth, relate generally to turbine steam seal field, for solving the problems, such as that existing seal system easily leads to turbine shaft and the high tooth direct friction collision of packing, closure low efficiency.The high helical teeth packing of comb teeth described in the utility model, including packing main body, high tooth and high tooth beveled tip, the high tooth beveled tip are set on high tooth.The high tooth equipped with high tooth beveled tip that the utility model uses, the collision of axis and high tooth and abrasive damage when further decreasing axial play, while steam turbine being effectively prevent to start, and improve resistance vapour rate.
Description
Technical field
The utility model relates to seal system for steam turbine field more particularly to a kind of high helical teeth packings of comb teeth.
Background technique
Steam turbine is high-speed rotating large-scale, accurate heat to power output dynamic power machine.The quiet body such as cylinder, partition and main shaft,
Certain axially and radially gap must be reserved between the swivel such as blade, in case sound component is touched and is rubbed unit at work.For
Reduce the leakage vapour of labyrinth clearance, it is necessary to sealing gland be set, under the premise of guaranteeing not occurring sound friction, made at labyrinth clearance
In in critical field and tending to minimum value.It just can guarantee in this way and reduce leakage losses between multistage turbine cylinders at different levels and each, mention
High generatine set heat efficiency.
In every loss of steam turbine heat to power output, gland leakage losses occupy very big specific gravity, to the hot merit of steam turbine
Transfer efficiency has a major impact.Steam turbine occurred over more than 100 years, and technical know-how has been gradually improved, in existing steam turbine skill
Art is theoretical, and on the basis of manufacturing process and application material, it is unpractical for increasing substantially steam turbine internal efficiency, but passes through reduction
Turbine steam seal and rotor sound fit clearance achieve the purpose that reduce leakage vapour, are to improve steam turbine operation efficiency main path,
Improvement cost is far below Tong Liao area simultaneously, and the steam turbine of especially modern high capacity high parameter, vapour is leaked to turbine efficiency in gap
Influence it is bigger.Therefore it is most important to the raising of turbine efficiency to reduce labyrinth clearance leakage vapour.Packing is steam turbine sound portion
Transition member between part easily causes direct friction between steam turbine sound component to be collided because of labyrinth casing failure, injures vapour
The big axis of turbine causes the major accident of big axis permanent bending when serious.
Utility model content
The technical issues of the utility model solves easily causes turbine shaft and the high tooth direct friction of packing for existing seal system
Collision blocks low efficiency, provides a kind of high helical teeth packing of comb teeth.
In order to solve the above-mentioned technical problem, technical solution provided by the utility model are as follows:
A kind of high helical teeth packing of comb teeth, including serrate-type steam seal main body, admission end, low tooth and high tooth, the packing master
Body side is admission end, and the high tooth is equipped with high tooth beveled tip.
High tooth beveled tip can reduce axial play, while the collision and abrasion of axis and high tooth are damaged when steam turbine being effectively prevent to start
Wound.Steam enters packing from side where admission end, and the multi-level throttle bulking effect generated by a high tooth reduces steam and leaks,
Wherein high tooth beveled tip helps that steam is further hindered to flow, from low tooth stream in the steam chest especially formed between two high teeth
Flowing to the steam of high tooth crest effectively improves packing effect.
Preferably, the high tooth beveled tip is to admission end side bias.Bias can be with to the high tooth beveled tip of admission end
The effective steam that reduces leaks.
Preferably, the high tooth beveled tip tilt angle is not less than 20 °.The resistance vapour rate of packing can be improved in high tooth beveled tip.
Preferably, the high tooth is about 2~4cm than low tooth.
Preferably, 2~10 high teeth are set in the packing main body, 1~6 low tooth is set between every two high teeth,
The distance between every high tooth is identical, and the distance between low tooth between two high teeth is identical.
Preferably, 4~5 high teeth are set in the packing main body, 4~5 low teeth are set between every two high teeth, often
The distance between the high tooth of root is identical, and the distance between low tooth between two high teeth is identical.It could be formed between two high teeth
The throttling expansion of effect.
Compared with prior art, the utility model has the beneficial effect that using the high tooth for being equipped with high tooth beveled tip, into one
The collision of axis and high tooth and abrasive damage when walking and reduce axial play, while steam turbine being effectively prevent to start, mitigate between axis and high tooth
Abrasion and collision.Overcome the deficiencies in the prior art.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the high helical teeth packing of comb teeth of the utility model.
Fig. 2 is the Section A-A schematic diagram of Fig. 1.
Wherein, 1, packing main body, 2, high tooth, 3, high tooth beveled tip, 4, low tooth, 5, admission end.
Specific embodiment
Following embodiment is the further explanation to the utility model, rather than limitations of the present invention.
Embodiment 1
As shown in Figure 1, a kind of high helical teeth packing of comb teeth, including serrate-type steam seal main body 1, admission end 5, low tooth 4 and high tooth
2,1 side of packing main body is admission end 5, and the high tooth 2 is equipped with high tooth beveled tip 3.High tooth beveled tip 3 is to admission end 5
Bias, tilt angle are 30 °, i.e., are 150 ° with obtuse angle formed by high tooth.5 high tooth 2 is set altogether, is arranged between two high tooth 2
4 low teeth 4.The low tooth 4 of high 2 arm of tooth is 2cm high.
Steam enters packing from 5 place side of admission end, and the multi-level throttle bulking effect generated by 5 high tooth 2 is reduced and steamed
Vapour leaks, wherein high tooth beveled tip 3 helps that steam is further hindered to flow, the steam chest especially formed between two high tooth 2
The flowing of the interior steam that high 2 top of tooth is flowed to from low tooth 4, effectively improves packing effect.
Embodiment 2
2 difference from Example 1 of embodiment is: for high tooth beveled tip 3 to admission end bias, tilt angle is 60 °, i.e., with
Obtuse angle formed by high tooth is 120 °；4 high teeth are set altogether, 5 low teeth 4 are set between two high tooth 2, the low tooth 4 of high 2 arm of tooth is high
4cm。
Steam enters packing from 5 place side of admission end, and the multi-level throttle bulking effect generated by 4 high tooth 2 is reduced and steamed
Vapour leaks, wherein high tooth beveled tip 3 helps that steam is further hindered to flow, the steam chest especially formed between two high tooth 2
The flowing of the interior steam that high 2 top of tooth is flowed to from low tooth 4, effectively improves packing effect.
Embodiment 3
3 difference from Example 1 of embodiment is: 2 high teeth of setting, and 6 low teeth 4 are arranged between two high tooth 2.
Steam enters packing from 5 place side of admission end, and the multi-level throttle bulking effect generated by 2 high tooth 2 is reduced and steamed
Vapour leaks, wherein high tooth beveled tip 3 helps that steam is further hindered to flow, the steam chest especially formed between two high tooth 2
The flowing of the interior steam that high 2 top of tooth is flowed to from low tooth 4, effectively improves packing effect.
Embodiment 4
4 difference from Example 1 of embodiment is: 10 high teeth of setting, and 1 low tooth 4 is arranged between two high tooth 2.
Steam enters packing from 5 place side of admission end, and the multi-level throttle bulking effect generated by 10 high tooth 2 is reduced
Steam leaks, wherein high tooth beveled tip 3 helps that steam is further hindered to flow, the vapour especially formed between two high tooth 2
Interior flows to the flowing of the steam at high 2 top of tooth from low tooth 4, effectively improves packing effect.
Examples 1 to 4 has been all made of the high tooth with high tooth beveled tip, and packing resistance vapour rate can be improved in the high tooth beveled tip
6~7% or so.
Above-listed detailed description is illustrating for the utility model possible embodiments, and the embodiment is not to limit
The scope of the patents of the utility model, all equivalence enforcements or change without departing from carried out by the utility model, is intended to be limited solely by this case
In the scope of the patents.
Claims (4)
1. a kind of high helical teeth packing of comb teeth, including packing main body, admission end, low tooth and high tooth, the packing body side are
Admission end, which is characterized in that the high tooth is equipped with high tooth beveled tip；The high tooth beveled tip is to one skew back of admission end
Folding；The tilt angle of the high tooth beveled tip is not less than 20 °.
2. the high helical teeth packing of a kind of comb teeth according to claim 1, which is characterized in that the high tooth is about 2 than low tooth ~
4cm。
3. the high helical teeth packing of a kind of comb teeth according to claim 1, which is characterized in that in the packing main body be arranged 2 ~
1 ~ 6 low tooth is arranged between every two high teeth for 10 high teeth, and the distance between every high tooth is identical, low between two high teeth
The distance between tooth is identical.
4. the high helical teeth packing of a kind of comb teeth according to claim 3, which is characterized in that in the packing main body be arranged 4 ~
4 ~ 5 low teeth are arranged between every two high teeth for 5 high teeth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820292235.6U CN209163878U (en) | 2018-03-02 | 2018-03-02 | A kind of high helical teeth packing of comb teeth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820292235.6U CN209163878U (en) | 2018-03-02 | 2018-03-02 | A kind of high helical teeth packing of comb teeth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209163878U true CN209163878U (en) | 2019-07-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201820292235.6U Active CN209163878U (en) | 2018-03-02 | 2018-03-02 | A kind of high helical teeth packing of comb teeth |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111005772A (en) * | 2019-11-29 | 2020-04-14 | 安徽节源环保科技有限公司 | Servo suspension tooth brush type steam seal of steam turbine unit |
-
2018
- 2018-03-02 CN CN201820292235.6U patent/CN209163878U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111005772A (en) * | 2019-11-29 | 2020-04-14 | 安徽节源环保科技有限公司 | Servo suspension tooth brush type steam seal of steam turbine unit |
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