CN204284449U - A kind of circular arc form drag revolves grid sealing configuration - Google Patents
A kind of circular arc form drag revolves grid sealing configuration Download PDFInfo
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- CN204284449U CN204284449U CN201420748893.3U CN201420748893U CN204284449U CN 204284449 U CN204284449 U CN 204284449U CN 201420748893 U CN201420748893 U CN 201420748893U CN 204284449 U CN204284449 U CN 204284449U
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- circular arc
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- form drag
- sealing
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Abstract
A kind of circular arc form drag revolves grid sealing configuration, and comprise rotor, seal and circular arc form drag revolve grid.Seal is enclosed within the outer surface of rotor, and its inside is provided with sealing tooth, and multiple circular arc form drag is revolved grid and is distributed on the air inlet end face of seal.The circular arc form drag arranged revolves grid, plays guide vane effect, produces certain drag effect to Incoming gas, this drag effect just, reduce the circumferential speed of air-flow in Seal cage, inhibit the Airflow Exciting-Vibration Force that in sealing, gas produces, improve rotor stability.In rotating machinery, gas is prewhirled before entering sealing speed, and gas flow revolves after grid 1 effectively can reduce circumferential speed through circular arc form drag, and then reduces the intersection rigidity of sealing, contributes to the stability improving sealing, and then improves the rotor stability of rotating machinery.
Description
Technical field: the utility model is a kind of sealing configuration be applied in rotating machinery, especially a kind of circular arc form drag reducing entry spin suppression Airflow Exciting-Vibration Force revolves grid sealing configuration.
Background technique: sealing configuration is the critical component of the rotating machineries such as aeroengine, steam turbine, compressor, sealing configuration also can produce Airflow Exciting-Vibration Force while suppression rotating machinery fluid leaks, and affects rotor stability.Along with improving constantly of rotating machinery working medium parameter, the flow-induced vibration problem caused by sealing air-flow power is more and more outstanding.
Research shows, the main cause that sealing flow-induced vibration produces is that the intersection rigidity produced by the circumferential speed of sealing inner fluid causes.The circumferential speed of sealing inner fluid is produced by following two aspects: one is that sealing inner fluid produces circumferential flow under the viscous friction of rotor drives; Two is that fluid before entering sealing has larger entrance and to prewhirl speed.Both all can make fluid in sealing, have certain circumferential speed.Fluid, in the circumferential flow of seal clearance, makes seal clearance fluid circumferential pressure skewness, produces Airflow Exciting-Vibration Force by uneven pressure distribution, and then generation intersection rigidity causes sealing unstability.
For reducing sealing Airflow Exciting-Vibration Force, improve the stability of sealing, people, on the basis of traditional labyrinth seal, propose multiple sealing configuration by the structure changing sealing itself.Nineteen eighty-two, Von Pragenau reduces the circumferential flow velocity of sealing inner fluid by the degree of roughness changing sealing inner circumferential surface, proposes honeycomb seal structure.In view of factors such as honeycomb seal processing technology are complicated, foreign scholar proposes similar to honeycomb seal structure, has the pass sealing configuration of cylindrical hole.Vance and Shultz in Texas ,Usa A & M university's turbomachinery laboratory in 1991 have developed pouch-type sealing.The circumferential dividing plate of pouch-type sealing and groove can reduce the circumferential flow speed of fluid effectively.Although above-mentioned seal form mechanism is incomplete same, but inherently belong to and increase the resistance of fluid by circumferential chamber by changing sealed inside structure, weaken the circumferential flow of sealing inner fluid, and then reduce sealing intersection rigidity, to reach the object increasing rotor stability.Above-mentioned sealing is not prewhirled for reduction entrance and is made corresponding measure, and to seal inlet whirl be the key factor causing sealing unstability, and therefore, sealing flow-induced vibration problem can not be solved at all.
Model utility content: technical problem to be solved in the utility model is for above-mentioned the deficiencies in the prior art, propose a kind of circular arc form drag and revolve grid sealing configuration, this structure can effectively reduce sealing entry spin, reduce Airflow Exciting-Vibration Force, improve the stability of sealing, thus improve the rotor stability of the rotating machinery such as motor, steam turbine.
For achieving the above object, the technical solution adopted in the utility model is: a kind of circular arc form drag revolves grid sealing configuration, comprises rotor, and seal and circular arc form drag revolve grid.Seal is enclosed within the outer surface of rotor, and its lower end is provided with sealing tooth, and multiple circular arc form drag is revolved grid and is distributed on the end face of seal.
Preferably, the chord length scope that described circular arc form drag revolves grid is between the shoulder of seal and crown, and chord length is 10 ~ 15mm, and with one heart, central angle corresponding to arc-shaped edges is 45 ° ~ 60 ° for radial external arc limit and Inner arc limit; Circumferential width is 3 ~ 5mm, and axial height is 3 ~ 5mm, and the spacing that adjacent circular arc form drag revolves grid is 10 ~ 25mm.
Preferably, circular arc form drag revolves grid and the as a whole structure of seal.
Preferably, outside described seal, be equipped with T-shaped structure, for being connected with stuffing box gland.
A kind of sealed entry that reduces that the utility model proposes is prewhirled and is suppressed the circular arc form drag of Airflow Exciting-Vibration Force to revolve grid sealing configuration, and its major advantage is as follows:
(1) structure is simple, do not change the internal structure of conventional seals, only evenly arranging circular arc form drag in conventional seals inlet end portion circumference revolves grid structure, and any type of labyrinth seal, honeycomb damping seal, pass damping seal, pouch-type sealing etc. can be changed into corresponding circular arc form drag accordingly and revolve grid sealing configuration;
(2) circular arc form drag is set at sealed entry place and revolves grid structure, add sealed entry incoming flow circumferential flow resistance, effectively can reduce the speed of prewhirling of sealing air inlet.
(3) circular arc form drag revolves the intersection rigidity that grid effectively can reduce sealing, increases the main damping of sealing, improves the stability of sealing, improves the rotor stability of the rotating machineries such as aeroengine, steam turbine, compressor.
Accompanying drawing explanation
The utility model patent proposition resistance is revolved grid sealing configuration and is applicable to any one rotation non-contacting sealing structure, is described in accompanying drawing for labyrinth seal.
Fig. 1 is that circular arc form drag revolves grid seal and rotor axial structural representation.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the structural representation that circular arc form drag revolves grid.
Fig. 4 is T-slot, sealing, rotor integral circumferential partial view.
In figure, 1 is that circular arc form drag revolves grid, and 2 is seals, and 3 is sealing teeth, and 4 is stuffing box glands, and 5 is T-slots, and 6 is rotors, and O is the center of circle of rotor, and O ' is the center of circle of circular arc.
Embodiment:
Below in conjunction with the accompanying drawing in the utility model embodiment, to the technological scheme in the utility model embodiment carry out clear, intactly describe, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
As Figure 1-Figure 4: a kind of circular arc form drag revolves grid sealing configuration, comprises rotor 6, seal 2 and circular arc form drag revolve grid 1.Its mounting type is T-slot mounting type, this design of Sealing Structure is become to be fixed on the fixed component of cylinder T-slot 5, is enclosed within rotor 6 surface.Seal 2 is enclosed within the outer surface of rotor 6, and its lower end is provided with sealing tooth 3, and stuffing box gland 4 is arranged on the upper end of seal 2, and both are connected by T-slot 5.Multiple circular arc form drag is revolved grid 1 and is distributed on the end face of seal 2.Between the shoulder that the chord length scope that described circular arc form drag revolves grid 1 is in seal 2 and crown, chord length L is 12mm, and with one heart, central angle alpha corresponding to arc-shaped edges is 50 ° for radial external arc limit and Inner arc limit; Circumferential width W is 4mm, and axial height H is 4mm.Circular arc form drag is revolved grid 1 and is cast into an overall structure with seal 2.As shown in Figure 4, the direction of arrow is the direction of air-flow, the right side of sealing configuration is high pressure side, and left side is low voltage side, and the circular arc form drag arranged in ingress revolves grid 1, play guide vane effect, certain drag effect is produced to Incoming gas, just this drag effect, reduce the circumferential speed of air-flow in Seal cage, inhibit the Airflow Exciting-Vibration Force that in sealing, gas produces, improve rotor stability.In rotating machinery, gas is prewhirled before entering sealing speed, the circumferential speed that grid 1 effectively can reduce gas coming through is revolved in resistance, and then reduces the intersection rigidity of sealing, contributes to the stability improving sealing, and then improving the rotor stability of rotating machinery, sealing block material is common 45 steel, GC
r15deng material.
Claims (5)
1. circular arc form drag revolves a grid sealing configuration, it is characterized in that: comprise rotor, and seal and circular arc form drag revolve grid; Seal is enclosed within the outer surface of rotor, and its inside is provided with sealing tooth, and multiple circular arc form drag is revolved grid circumference and is distributed on the entrance face of seal.
2. a kind of circular arc form drag as claimed in claim 1 revolves grid sealing configuration, it is characterized in that: the chord length scope that described circular arc form drag revolves grid is between the shoulder of seal and crown, chord length is 10 ~ 15mm, with one heart, central angle corresponding to arc-shaped edges is 45 ° ~ 60 ° for radial external arc limit and Inner arc limit; Circumferential width is 3 ~ 5mm, and axial height is 3 ~ 5mm.
3. a kind of circular arc form drag as claimed in claim 1 or 2 revolves grid sealing configuration, it is characterized in that: the spacing that adjacent circular arc form drag revolves grid is 10 ~ 25mm.
4. a kind of circular arc form drag as claimed in claim 1 revolves grid sealing configuration, it is characterized in that: circular arc form drag revolves grid and seal is cast into an overall structure.
5. a kind of circular arc form drag as claimed in claim 1 revolves grid sealing configuration, it is characterized in that: be equipped with the T-shaped structure for being connected with stuffing box gland outside described seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420748893.3U CN204284449U (en) | 2014-12-01 | 2014-12-01 | A kind of circular arc form drag revolves grid sealing configuration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420748893.3U CN204284449U (en) | 2014-12-01 | 2014-12-01 | A kind of circular arc form drag revolves grid sealing configuration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204284449U true CN204284449U (en) | 2015-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420748893.3U Expired - Fee Related CN204284449U (en) | 2014-12-01 | 2014-12-01 | A kind of circular arc form drag revolves grid sealing configuration |
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| CN (1) | CN204284449U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949245A (en) * | 2017-03-07 | 2017-07-14 | 西安交通大学 | It is a kind of from spin-ended convergence type rotary seal structure |
| CN109404058A (en) * | 2018-12-03 | 2019-03-01 | 河北国源电气股份有限公司 | Steam turbine packing |
| CN113606344A (en) * | 2021-07-30 | 2021-11-05 | 西安交通大学 | Labyrinth seal based on optimized rotor dynamic characteristics of inter-tooth anti-rotation plate |
-
2014
- 2014-12-01 CN CN201420748893.3U patent/CN204284449U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949245A (en) * | 2017-03-07 | 2017-07-14 | 西安交通大学 | It is a kind of from spin-ended convergence type rotary seal structure |
| CN106949245B (en) * | 2017-03-07 | 2018-04-17 | 西安交通大学 | It is a kind of from spin-ended convergence type rotary seal structure |
| CN109404058A (en) * | 2018-12-03 | 2019-03-01 | 河北国源电气股份有限公司 | Steam turbine packing |
| CN109404058B (en) * | 2018-12-03 | 2024-01-16 | 河北国源电气股份有限公司 | Steam seal for steam turbine |
| CN113606344A (en) * | 2021-07-30 | 2021-11-05 | 西安交通大学 | Labyrinth seal based on optimized rotor dynamic characteristics of inter-tooth anti-rotation plate |
| CN113606344B (en) * | 2021-07-30 | 2022-12-09 | 西安交通大学 | Labyrinth seal based on optimized rotor dynamic characteristics of inter-tooth anti-rotation plate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20151201 |
|
| EXPY | Termination of patent right or utility model |