CN101886555A - Sealing device for rotor blade of flue gas turbine expander - Google Patents
Sealing device for rotor blade of flue gas turbine expander Download PDFInfo
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- CN101886555A CN101886555A CN2010102325885A CN201010232588A CN101886555A CN 101886555 A CN101886555 A CN 101886555A CN 2010102325885 A CN2010102325885 A CN 2010102325885A CN 201010232588 A CN201010232588 A CN 201010232588A CN 101886555 A CN101886555 A CN 101886555A
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- blade
- rotor blade
- flue gas
- ring
- gas turbine
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Abstract
A sealing device for a rotor blade of a flue gas turbine expander comprises a rotor blade, a turntable, a stator blade and a fixed blade ring, wherein a sealing cingulum is arranged between the rotor blade and a stator blade component and is used for isolating turntable cooling steam in an annular cavity formed by the fixed blade ring, a rotor blade root and the turntable; the rotor blade enables a side plate between a blade body and a blade root to extend outwards and protrude out of the end surface after assembly of the rotor blade and the turntable so as to from annular table facets after assembly of all the rotor blades and the turntable; and the fixed blade ring is fixed with cellular sealing rings which are matched with the annular table facets on the rotor blades so as to from a sealing cingulum. The turntable cooling steam is sealed in a rotor blade runner by additionally arranging a seal between the rotor blade and the static blade component so as to enable the cooling steam to cool the blade root to the maximum, thereby improving the use strength of the blade root, reducing cooling steam output quantity to the greatest extent, lowering the rotor blade abrasion and enhancing service life and efficiency of the flue gas turbine expander.
Description
Technical field
The invention belongs to flue gas turbine expander rotor blade blade root and wheel disc tongue-and-groove protective gear, the sealing configuration of particularly a kind of moving vane and stationary vane assembly assembling is a kind of sealing device for rotor blade of flue gas turbine expander specifically.
Background technique
Flue gas turbine expander is a turbine installation, is used for reclaiming pressure potential and the heat energy that flue gas is pressed in the high temperate zone of refinery catalytic cracking unit, changes mechanical energy into.Wherein the structure of critical piece rotor, stator blade directly has influence on the safe handling and the service life of cigarette machine.Flue gas turbine expander when work medium be 600-700 ℃ of high-temperature flue gas that contains solid particle, it can be converted to mechanical energy by moving vane with heat energy and pressure after by stator blade, drives the rotor acting.High-temperature flue gas overcurrent part mainly by stator blade, be installed in rotor movable vane on the wheel disc etc. and form; stator blade is a static element; rotor blade, wheel disc are rotating component; be Spielpassung between the two; because the overcurrent portion temperature is very high; front end is connected with steam in wheel core portion, the part cooling protection that wheel disc, moving vane are connected with wheel disc.In existing structure, blade root directly links to each other with the runner of cigarette machine with the clearance channel of tenon tooth, and steam mixes with flue gas in running usually, causes moving vane leaf root part temperature too high, reduce the working strength of moving vane material, the fracture accident of blade root takes place.Simultaneously a large amount of steam enters runner, and moving vane blade position produces eddy current, and the aggravation blade wear reduces rotor working life, has also reduced the efficient of flue gas turbine expander simultaneously.
Summary of the invention
Technical problem to be solved by this invention provides the seal arrangement of a kind of moving vane and stationary vane assembly assembling, the wheel disc cooling steam is stabilized in the space that comprises blade root and tenon tooth, thereby effective isolation flue gas, cooling movable vane blade root and wheel disc tenon tooth, improve the safety coefficient that blade uses, reduce cooling steam to greatest extent to the runner influence on flow field simultaneously.
The present invention adopts following technical proposals to solve its technical problem:
A kind of sealing device for rotor blade of flue gas turbine expander comprises moving vane, wheel disc, stator blade and fixed blade ring, establishes a seal ring platform between described moving vane and the stationary vane assembly, and the wheel disc cooling steam is stoped in the ring cavity of fixed blade ring and moving vane blade root, wheel disc formation.
Described seal ring platform is that the former between moving vane blade and the blade root is overhanging, protrudes from the end face after moving vane and wheel disc assemble, and forms the ring-type table top at all moving vanes and wheel disc assembling back.
The inboard of the overhanging former of described moving vane is provided with 2-6 road sealing tooth.
Described stationary vane assembly comprises stator blade and fixed blade ring, on the described fixed blade ring seal ring is set, and seal ring matches with ring-type table top on the moving vane and forms the seal ring platform.
Described seal ring is a cellular structure.
The cooling medium that sealing configuration of the present invention adopts is superheated vapor or hot nitrogen.Cooling medium consumption is at 200-1000Kg/h.
The present invention is sealed in the wheel disc cooling steam within the movable vane runner by increasing to seal between stationary vane assembly at moving vane, make cooling steam at utmost cool off blade root, thereby improved the working strength of blade root, reduce simultaneously the cooling steam output quantity to greatest extent, reduce the wearing and tearing of moving vane, improve the working life and the efficient of flue gas turbine expander.
Description of drawings
Fig. 1 is the whole sectional drawing of flue gas turbine expander of the present invention;
Fig. 2 is a schematic diagram of sealing device of the present invention;
Fig. 3 is the moving vane plan view.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail:
The present invention is a kind of sealing device for rotor blade of flue gas turbine expander, comprises moving vane 3, wheel disc 2, stator blade 4 and fixed blade ring 6.Establish a seal ring platform between moving vane 3 and the stationary vane assembly 1, wheel disc 2 cooling steams are stoped in the ring cavity that fixed blade ring 6 and moving vane blade root 3.3, wheel disc 2 form.The seal ring platform is that the former that moving vane 3 is designed between blade 3.1 and the blade root 3.3 is overhanging, protrude from the end face 8 after moving vane and wheel disc assemble, form a sealing ring table top 3.2 at all moving vanes and wheel disc assembling back, there is 2-6 road sealing tooth 9 inboard of ring-type table top 3.2.Stationary vane assembly 1 comprises stator blade 4 and fixed blade ring 6, adorns a honey-comb type seal ring 5 on fixed blade ring 6, matches with the ring-type table top 3.2 that protrudes on the moving vane to form a kind of dentation sealing configuration.
The needed cooling medium of sealing cooling structure of the present invention is superheated vapor or hot nitrogen.Rate-of flow is controlled at 200-1000Kg/h.
Flue gas turbine expander is in working order the time, and high-temperature flue gas A discharges by stator blade 4, moving vane 3 acting backs.Wheel disc cooling steam B enters the cavity between wheel disc 2 and the stator blade group 11, and the gap between passive blade 3 and the fixed blade ring 6 flows into runner, plays the cooling action to wheel disc 2 and movable vane blade root 3.3.Usually wheel disc 2, movable vane end face 8, and fixed blade ring 6 between be open, just there is the temperature radiation effect in high-temperature flue gas in the runner to wheel disc 2 and movable vane blade root 3.3 like this, make movable vane blade root 3.3 temperature too high, reduce the working strength of moving vane, can produce flue gas after wheel disc cooling steam B enters and flows to simultaneously and disturb, movable vane blade 3.1 is produced wash away, influence the safe operation of flue gas turbine expander.
Therefore the sealing configuration of setting up between wheel disc 2, moving vane 3 end faces and fixed blade ring 6 makes movable vane blade root 3.3, wheel disc 2 be protected in the wheel disc cooling steam chamber; make wheel disc cooling steam B at utmost cool off movable vane blade root 3.3 and wheel disc 2; stop wheel disc cooling steam B to flow into runner again, guaranteed the safe operation of flue gas turbine expander.
Claims (5)
1. sealing device for rotor blade of flue gas turbine expander, comprise moving vane, wheel disc, stator blade and fixed blade ring, it is characterized in that: establish a seal ring platform between described moving vane (3) and the stationary vane assembly (1), wheel disc cooling steam (B) is stoped in the ring cavity that fixed blade ring 6 and moving vane blade root 3.3, wheel disc 2 form.
2. sealing device for rotor blade of flue gas turbine expander according to claim 1, it is characterized in that described seal ring platform is that the blade (3.1) and the former between the blade root (3.3) of moving vane is overhanging, protrude from the end face (8) after moving vane and wheel disc assemble, form ring-type table top (3.2) at all moving vanes and wheel disc assembling back.
3. sealing device for rotor blade of flue gas turbine expander according to claim 2 is characterized in that the inboard of described ring-type table top (3.2) is provided with 2-6 road sealing tooth (9).
4. sealing device for rotor blade of flue gas turbine expander according to claim 1 is characterized in that being provided with on the described stationary vane assembly (1) seal ring (5), and seal ring (5) matches with ring-type table top (3.2) on the moving vane and forms the seal ring platform.
5. sealing device for rotor blade of flue gas turbine expander according to claim 4 is characterized in that described seal ring (5) is a cellular structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102325885A CN101886555A (en) | 2010-07-09 | 2010-07-09 | Sealing device for rotor blade of flue gas turbine expander |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102325885A CN101886555A (en) | 2010-07-09 | 2010-07-09 | Sealing device for rotor blade of flue gas turbine expander |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101886555A true CN101886555A (en) | 2010-11-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102325885A Pending CN101886555A (en) | 2010-07-09 | 2010-07-09 | Sealing device for rotor blade of flue gas turbine expander |
Country Status (1)
| Country | Link |
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| CN (1) | CN101886555A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373160A (en) * | 2014-10-09 | 2015-02-25 | 中国石油天然气集团公司 | Air intake cone of flue gas turbine and flue gas turbine |
| CN104775855A (en) * | 2015-04-22 | 2015-07-15 | 上海成航涡轮技术有限公司 | Internal stationary blade flue gas turbine |
| CN114607473A (en) * | 2020-12-07 | 2022-06-10 | 中国石油天然气集团有限公司 | Sealing structure of flue gas turbine and flue gas turbine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5639216A (en) * | 1994-08-24 | 1997-06-17 | Westinghouse Electric Corporation | Gas turbine blade with cooled platform |
| EP0926314A1 (en) * | 1997-06-18 | 1999-06-30 | Mitsubishi Heavy Industries, Ltd. | Seal structure for gas turbines |
| US6217279B1 (en) * | 1997-06-19 | 2001-04-17 | Mitsubishi Heavy Industries, Ltd. | Device for sealing gas turbine stator blades |
| JP2001123803A (en) * | 1999-10-21 | 2001-05-08 | Toshiba Corp | Sealing device, steam turbine having the device, and power generating plant |
| CN2821165Y (en) * | 2005-09-29 | 2006-09-27 | 中国石油天然气集团公司 | Heat-proof radiation device for smoke turbine bearing box |
| CN201241730Y (en) * | 2008-08-13 | 2009-05-20 | 成都市成航发工艺有限公司 | First level semi-smoke turbine apparatus |
| CN201714430U (en) * | 2010-07-09 | 2011-01-19 | 兰州长城机械工程有限公司 | Rotor blade sealing device for flue gas turbine |
-
2010
- 2010-07-09 CN CN2010102325885A patent/CN101886555A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5639216A (en) * | 1994-08-24 | 1997-06-17 | Westinghouse Electric Corporation | Gas turbine blade with cooled platform |
| EP0926314A1 (en) * | 1997-06-18 | 1999-06-30 | Mitsubishi Heavy Industries, Ltd. | Seal structure for gas turbines |
| US6217279B1 (en) * | 1997-06-19 | 2001-04-17 | Mitsubishi Heavy Industries, Ltd. | Device for sealing gas turbine stator blades |
| JP2001123803A (en) * | 1999-10-21 | 2001-05-08 | Toshiba Corp | Sealing device, steam turbine having the device, and power generating plant |
| CN2821165Y (en) * | 2005-09-29 | 2006-09-27 | 中国石油天然气集团公司 | Heat-proof radiation device for smoke turbine bearing box |
| CN201241730Y (en) * | 2008-08-13 | 2009-05-20 | 成都市成航发工艺有限公司 | First level semi-smoke turbine apparatus |
| CN201714430U (en) * | 2010-07-09 | 2011-01-19 | 兰州长城机械工程有限公司 | Rotor blade sealing device for flue gas turbine |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373160A (en) * | 2014-10-09 | 2015-02-25 | 中国石油天然气集团公司 | Air intake cone of flue gas turbine and flue gas turbine |
| CN104373160B (en) * | 2014-10-09 | 2017-01-11 | 中国石油天然气集团公司 | Air intake cone of flue gas turbine and flue gas turbine |
| CN104775855A (en) * | 2015-04-22 | 2015-07-15 | 上海成航涡轮技术有限公司 | Internal stationary blade flue gas turbine |
| CN114607473A (en) * | 2020-12-07 | 2022-06-10 | 中国石油天然气集团有限公司 | Sealing structure of flue gas turbine and flue gas turbine |
| CN114607473B (en) * | 2020-12-07 | 2024-06-25 | 中国石油天然气集团有限公司 | Sealing structure of flue gas turbine and flue gas turbine |
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Application publication date: 20101117 |