CN104929700A - Spiral multi-section combined type sealing labyrinth - Google Patents
Spiral multi-section combined type sealing labyrinth Download PDFInfo
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- CN104929700A CN104929700A CN201510306397.1A CN201510306397A CN104929700A CN 104929700 A CN104929700 A CN 104929700A CN 201510306397 A CN201510306397 A CN 201510306397A CN 104929700 A CN104929700 A CN 104929700A
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- labyrinth
- comb tooth
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- screw type
- spiral
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Abstract
The invention belongs to rotary sealing devices, and particularly relates to a device which can prevent labyrinth seal structure media from being leaked. The device is particularly applied to the fields of aero-engines, combustion gas turbines and steam turbines. The invention provides a spiral multi-section combined type sealing labyrinth which can improve the sealing effect at all the rotating speed stages and lower the requirement for the air entraining content of a compressor outlet. The spiral multi-section combined type sealing labyrinth comprises a rotating shaft with common labyrinth bodies and a static ring face. The left side and the right side of the common labyrinth bodies are provided with left section spiral labyrinth bodies and right section spiral labyrinth bodies respectively. The rotating direction of the left section spiral labyrinth bodies is opposite to the rotating direction of the right section spiral labyrinth bodies. The static ring face abuts against the common labyrinth bodies, the left section spiral labyrinth bodies and the right section spiral labyrinth bodies to form a sealing face. The spiral multi-section combined type sealing labyrinth has the beneficial effects that a traditional sealing labyrinth is optimized to be the spiral multi-section combined type sealing labyrinth, so that the sealing effect is improved at all the rotating speed stages, and meanwhile the requirement for the air entraining content of the compressor outlet is lowered.
Description
Technical field
The invention belongs to rotating sealing device, particularly a kind of device avoiding labyrinth gas seals structured media to reveal, be applied to aeroengine, gas turbine and steam turbine field especially.
Background technique
In all types of industries device, comb tooth of obturaging obtains application widely as important seal element, and its sealability also affects the performance of equipment performance greatly.
Labyrinth gas seals is widely used a kind of effective, the long-life non-contacting sealing structure of gas turbine, cooling as in the top of compressor blade and turbine blade, flow path system, combustion gas isolation, oil gas isolation etc. in bearing bore oil seal system.The sealing of comb tooth has significant impact to the performance of gas turbine, reliability, life-span and maintenance, because sealing problem causes the situation of engine failure and accident to happen occasionally, along with the raising of gas turbine performance, loop parameter increases and rotor speed adds ambassador's air-proof condition increasingly badly, seals the problem caused and becomes increasingly conspicuous.
Existing gas turbine bearing bore is obturaged and is usually adopted the dynamic seal apparatus of labyrinth gas seals, and side running shaft is processed with V-type comb tooth, and side is the static counterpart adopting coating or adopt cellular structure.Along with the raising of temperature before engine turbine, hot-end component cooling and bearing bore seal increasing to the demand of bleed air amount, high-pressure air more and more through multistage compressor compression is used for cooling and sealing, has had a strong impact on the overall performances such as the specific thrust of motor and oil consumption rate.Meanwhile, at high speed, high amount of air entrainment also can reduce the stability margin of compression system, and then reduces the transition temperature performance of complete machine.
Summary of the invention
Pin is in order to solve the problem, and the present invention proposes a kind of simultaneously can reduction the multi-section combined comb tooth of obturaging of the screw type of the demand of blower outlet amount of air entrainment at each rotating speed stage raising sealing effect.
The technical solution used in the present invention is the multi-section combined comb tooth of obturaging of a kind of screw type, comprise running shaft, the static anchor ring of being with common comb tooth, the left and right sides of described common comb tooth is respectively arranged with left section of screw type comb tooth, right section of screw type comb tooth, the rotation direction of described left section of screw type comb tooth, right section of screw type comb tooth is contrary, and described static anchor ring is near living common comb tooth, left section of screw type comb tooth, right section of screw type comb tooth and form sealing surface.
Further, the height of described left section of screw type comb tooth, right section of screw type comb tooth is the same with common comb tooth height.
The invention has the advantages that: the present invention, by traditional comb tooth of obturaging is optimized for the multi-section combined comb tooth of obturaging of screw type, can improves sealing effect in each rotating speed stage, reduce the demand to blower outlet amount of air entrainment simultaneously.And after the amount of air entrainment reduction of gas compressor, overall performance can be improved, reduce the oil consumption rate of motor, when fuel load is identical, the combat radius of aircraft can be increased, and reduce turbine inlet temperature (TIT), thus extend the working life of turbine, extend overhaul and the comdemning period of motor, reach and reduce costs, promote the object of aircraft fighting capacity.At high speed, low amount of air entrainment also can improve the stability margin of compression system, and then improves the transition temperature performance of complete machine, increases the Security of motor manipulation simultaneously, therefore has larger application value in army.
Accompanying drawing explanation
Fig. 1 is that a kind of conventional art is obturaged the structural representation of comb tooth;
Fig. 2 is structural representation of the present invention;
Fig. 3 is the three-dimensional structure schematic diagram of running shaft in embodiment;
Fig. 4 is that worm gear-endless screw coordinates transmission schematic diagram;
Fig. 5 is the structural representation of right section of screw type comb tooth in embodiment.
Shown in figure: 1-running shaft, 2-high-pressure air chamber, the static anchor ring of 3-, 4-common comb tooth, 5-lubricating cavity, 6-left section of screw type comb tooth, 7-right section of screw type comb tooth.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Wherein Fig. 1 is that a kind of conventional art is obturaged the structural representation of comb tooth, running shaft 1 is processed with common comb tooth 4, jointly forms sealing surface with static anchor ring 3, in order to isolated high-pressure air chamber 2 and lubricating cavity 5.
As shown in Figure 2, the invention provides the multi-section combined comb toothing of obturaging of a kind of screw type, comprise running shaft 1, the static anchor ring 3 of being with common comb tooth 4, the left and right sides of described common comb tooth 4 is respectively arranged with left section of screw type comb tooth 6, right section of screw type comb tooth 7, the rotation direction of described left section of screw type comb tooth 6, right section of screw type comb tooth 7 is contrary, and described static anchor ring 3 is near living left section of screw type comb tooth 6, right section of screw type comb tooth 7, common comb tooth 4 and form sealing surface.If total number of common comb tooth 4, left section of screw type comb tooth 6, right section of screw type comb tooth 7 is N number of, then the number of left section of screw type comb tooth 6, right section of screw type comb tooth 7 is maximum can be (N-1)/2, and can be regarded as left section of contrary for the right and left 1 ~ (the N-1)/2 comb tooth rotation direction in N number of for untouched tight surface common comb tooth 4 screw type comb tooth 6, right section of screw type comb tooth 7 are replaced, centre still retains tradition without the individual common comb tooth 4 of spiral (1 ~ N-2).Described left section of screw type comb tooth 6, right section of screw type comb tooth 7 can integratedly with running shaft 1 be processed, and other Placements also can be adopted to fix.
The multi-section combined comb tooth of obturaging of a kind of screw type of the present invention adds screw type comb tooth on original comb tooth basis, worm gear-endless screw is adopted to coordinate the moulding of the worm screw in transmission, as shown in Figure 3, can coordinate transmission schematic diagram each rotating speed rank wheel-worm screw, worm screw is along the Driving force that can produce in the rotation process of own axes worm gear.
Wherein the rotation direction of left section of screw type comb tooth 6, right section of screw type comb tooth 7 is selected according to turning to of running shaft 1, to ensure that left section of screw type comb tooth 6 is following in running shaft 1 rotation process, has the Driving force of right-to-left to the medium on the left side; Right section of screw type comb tooth 7 is being followed in running shaft 1 rotation process, Driving force is from left to right had to the medium on the right, common comb tooth 4 simultaneously plays isolated both sides medium, as the contactless motive sealing means of one, and maximized isolated, the sealing achieving left chamber and right chamber.And the pitch P of left section of screw type comb tooth 6, right section of screw type comb tooth 7, helix angle A and root thickness t1, top thickness t2 select according to the demand of the rotating speed of running shaft 1 and local radius and pressure of obturaging.
Be preferred embodiment that the height of described left section of screw type comb tooth 6, right section of screw type comb tooth 7 is the same with common comb tooth height.The sealing effect forming sealing surface with static anchor ring 3 can be ensured like this.
The invention has the advantages that: traditional comb tooth of obturaging, when structural change is very little, is optimized for the multi-section combined comb tooth of obturaging of screw type by the present invention, sealing effect can be improved in each rotating speed stage, reduce the demand to blower outlet amount of air entrainment simultaneously.And after the amount of air entrainment reduction of gas compressor, overall performance can be improved, reduce the oil consumption rate of motor, when fuel load is identical, the combat radius of aircraft can be increased, and reduce turbine inlet temperature (TIT), thus extend the working life of turbine, extend overhaul and the comdemning period of motor, reach and reduce costs, promote the object of aircraft fighting capacity.At high speed, low amount of air entrainment also can improve the stability margin of compression system, and then improves the transition temperature performance of complete machine, increases the Security of motor manipulation simultaneously, therefore has larger application value in army.
Claims (2)
1. the multi-section combined comb tooth of obturaging of screw type, comprise running shaft (1), the static anchor ring (3) of being with common comb tooth (4), it is characterized in that: the left and right sides of described common comb tooth (4) is respectively arranged with left section of screw type comb tooth (6), right section of screw type comb tooth (7), the rotation direction of described left section of screw type comb tooth (6), right section of screw type comb tooth (7) is contrary, and described static anchor ring (3) is near living left section of screw type comb tooth (6), right section of screw type comb tooth (7), common comb tooth (4) and form sealing surface.
2. the multi-section combined comb tooth of obturaging of a kind of screw type according to claim 1, is characterized in that: the height of described left section of screw type comb tooth (6), right section of screw type comb tooth (7) is highly the same with common comb tooth (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510306397.1A CN104929700B (en) | 2015-06-05 | 2015-06-05 | The multi-section combined comb tooth of obturaging of a kind of screw type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510306397.1A CN104929700B (en) | 2015-06-05 | 2015-06-05 | The multi-section combined comb tooth of obturaging of a kind of screw type |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104929700A true CN104929700A (en) | 2015-09-23 |
| CN104929700B CN104929700B (en) | 2016-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510306397.1A Expired - Fee Related CN104929700B (en) | 2015-06-05 | 2015-06-05 | The multi-section combined comb tooth of obturaging of a kind of screw type |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139269A (en) * | 2017-06-27 | 2019-01-04 | 中国航发常州兰翔机械有限责任公司 | A kind of aero-engine labyrinth gas seals structure in the tapered bleed hole of band |
| CN111577901A (en) * | 2020-05-26 | 2020-08-25 | 南京工业大学 | Labyrinth and spiral combined sealing device |
| CN111927632A (en) * | 2020-08-11 | 2020-11-13 | 中国航发湖南动力机械研究所 | Lubricating oil sealing structure and aircraft engine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5975844A (en) * | 1995-09-29 | 1999-11-02 | Siemens Aktiengesellschaft | Sealing element for sealing a gap and gas turbine plant |
| CN1865737A (en) * | 2005-05-20 | 2006-11-22 | 北京化工大学 | Composite tooth-shape labyrinth spiral sealing |
| US20060267289A1 (en) * | 2003-06-20 | 2006-11-30 | Elliott Company | Hybrid abradable labyrinth damper seal |
| CN103322203A (en) * | 2013-07-09 | 2013-09-25 | 艾志（南京）环保管接技术股份有限公司 | Interference designed shaft rubber seal provided with fixing rings and helical teeth |
-
2015
- 2015-06-05 CN CN201510306397.1A patent/CN104929700B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5975844A (en) * | 1995-09-29 | 1999-11-02 | Siemens Aktiengesellschaft | Sealing element for sealing a gap and gas turbine plant |
| US20060267289A1 (en) * | 2003-06-20 | 2006-11-30 | Elliott Company | Hybrid abradable labyrinth damper seal |
| CN1865737A (en) * | 2005-05-20 | 2006-11-22 | 北京化工大学 | Composite tooth-shape labyrinth spiral sealing |
| CN103322203A (en) * | 2013-07-09 | 2013-09-25 | 艾志（南京）环保管接技术股份有限公司 | Interference designed shaft rubber seal provided with fixing rings and helical teeth |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139269A (en) * | 2017-06-27 | 2019-01-04 | 中国航发常州兰翔机械有限责任公司 | A kind of aero-engine labyrinth gas seals structure in the tapered bleed hole of band |
| CN111577901A (en) * | 2020-05-26 | 2020-08-25 | 南京工业大学 | Labyrinth and spiral combined sealing device |
| CN111577901B (en) * | 2020-05-26 | 2022-04-01 | 南京工业大学 | Labyrinth and spiral combined sealing device |
| CN111927632A (en) * | 2020-08-11 | 2020-11-13 | 中国航发湖南动力机械研究所 | Lubricating oil sealing structure and aircraft engine |
| CN111927632B (en) * | 2020-08-11 | 2022-05-31 | 中国航发湖南动力机械研究所 | Lubricating oil sealing structure and aircraft engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104929700B (en) | 2016-03-16 |
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Granted publication date: 20160316 Termination date: 20200605 |