CN203464335U - Sealed connecting structure of combustion chamber flame tube with pressure stabilizing cavity and transition section - Google Patents
Sealed connecting structure of combustion chamber flame tube with pressure stabilizing cavity and transition section Download PDFInfo
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- CN203464335U CN203464335U CN201320490512.1U CN201320490512U CN203464335U CN 203464335 U CN203464335 U CN 203464335U CN 201320490512 U CN201320490512 U CN 201320490512U CN 203464335 U CN203464335 U CN 203464335U
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- pressure stabilizing
- stabilizing cavity
- sealing
- changeover portion
- inner liner
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Abstract
The utility model relates to structural design of gas turbine combustion chambers and discloses a sealed connecting structure of a combustion chamber flame tube with a pressure stabilizing cavity and a transition section. The sealed connecting structure comprises the flame tube, the transition section and the sealing structure, the flame tube is inserted into the transition section, a combustion runner is jointly limited by inner wall faces of the flame tube and the transition section, the sealing structure is arranged between the flame tube and the transition section and comprises a sealing supporting member and an elastic sealing member, the sealing supporting member is step-shaped, the front end of the sealing supporting member is a protruding circular truncated cone, the sealing supporting member and the flame tube jointly form the step annular pressure stabilizing cavity, the elastic sealing member seals a joint of the flame tube and the transition section, a sealing cavity is jointly limited by the elastic sealing member and the sealing supporting member, and cool air cools the flame tube, the transition section and the sealing structure through a cooling passage and the sealing cavity respectively. The pressure stabilizing cavity can increase static pressure difference of the cool air, lower pressure loss, reduce cooling air consumption at the joint of the flame tube and the transition section and improve rigidity of the sealing supporting member.
Description
Technical field
The utility model relates to the structural design of gas-turbine combustion chamber, relates in particular to the hermetically-sealed construction that combustion chamber flame drum is connected with changeover portion, belongs to chain drive technical field.
Background technology
Gas turbine is the indispensable great chain drive of energy field.Combustion chamber is as one of three large core components of gas turbine, and its task is heating working medium, the chemical energy of fuel is converted into the heat energy of high-temperature fuel gas, and then the combustion gas that formation temperature and temperature field all meet the demands is delivered to and in turbine, done merit.Combustion chamber is structurally generally partly comprised of shell, burner inner liner and changeover portion etc.Wherein the coupling part of burner inner liner and changeover portion is provided with hermetically-sealed construction conventionally.
The effect of hermetically-sealed construction is in order to prevent that air from leaking in combustion channels in less desirable position, but it is very difficult that complete hermetic hermetically-sealed construction implements, general preferred employing has the hermetically-sealed construction of a small amount of leakage, and this leakage can be played cooling effect suitable in the situation that.Hermetically-sealed construction is owing to standing the HTHP of combustion gas inside combustion channels, and it exists high thermograde and pressure to change, therefore obtain suitable cooling be very important.
By the cold air at hermetically-sealed construction place, except wanting cooling and sealing structure itself, also want burner inner liner wall and the changeover portion wall of cooling junction, and it is conventionally very little by hermetically-sealed construction refrigerating gas flow, therefore may cause every cooling performance of junction can not be guaranteed, the Temperature Distribution of expectation be may not reach, variety of issue and fault occurred.
In the patent documentation that existing technology Patent publication number is US8307656, the wall of burner inner liner junction is made as double wall, by the wall of cold air side, drive baroport, open some Cooling Holes play main cooling effect by the wall of combustion gas side, elastic sealing element mainly seals.The tolerance of the elastic sealing element by hermetically-sealed construction in this patent is very little, cold air throughput can be controlled by the perforated area on burner inner liner wall, in order to reach the requirement of abundant cooling flame tube wall surface, may need the hole that meets some and perforated area is set, the demand that causes cold gas is large, the not high problem of utilization rate of cold air herein.
Utility model content
For solving problems of the prior art,
The technical scheme that the utility model adopts is as follows: the utility model arranges pressure stabilizing cavity before cold air enters combustion channels, can promote cold air differential static pressure, reduces the pressure loss, reduces the cooling-air consumption of burner inner liner and changeover portion junction.
With the combustion chamber flame drum of pressure stabilizing cavity and a syndeton for changeover portion sealing, this structure comprises burner inner liner, changeover portion and hermetically-sealed construction; Burner inner liner inserts in changeover portion, by the internal face of burner inner liner and changeover portion, jointly limits combustion channels, and hermetically-sealed construction is arranged between burner inner liner and changeover portion; It is characterized in that:
Described hermetically-sealed construction comprises seal support part and elastic sealing element; Seal support part is stepped, and front end is protruding round platform, and support member front bulkhead and support member aft bulkhead are connected on burner inner liner, and seal support part and burner inner liner outside wall surface form the pressure stabilizing cavity of a ladder annular; On round platform ladder end wall, along circumferentially at least arranging row's stagnation pressure air admission hole, on support member aft bulkhead, a discharge pore is circumferentially at least arranged on edge; Elastic sealing element is arranged on protruding round platform support member wall below, between elastic sealing element and seal support part, forms annular seal space.
Technical characterictic of the present utility model is also: in the burner inner liner outside wall surface in pressure stabilizing cavity, be furnished with fin.
Preferably, on described burner inner liner wall the rib spacing of fin high with rib than scope, be 5-20.
Another technical characterictic of the present utility model is: the gross area of described stagnation pressure air admission hole is less than the gross area of venthole.
Another technical characterictic of the present utility model is: elastic sealing element is comprised of locating sealing ring and at least one circular-arc elastic sealing strip, and circular-arc elastic sealing strip is arranged on locating sealing ring, and this locating sealing ring is fixed on seal support part.Described circular-arc elastic sealing strip number is preferably between 36 to 72.When circular-arc elastic packing strip adoption is more than two during circular-arc elastic sealing strip, the gap between adjacent two circular-arc elastic sealing strips is preferably within the scope of 1mm～3mm.
This utility model compared with prior art, have the following advantages and high-lighting effect: 1. the region division of the utility model before in refrigerating gas enters combustion channels a pressure stabilizing cavity, compare with the baroport air inlet of prior art, cold air enters pressure stabilizing cavity by pitot hole, promoted differential static pressure, pressure stabilizing cavity has the effect of rectification concurrently, thereby has reduced the pressure loss, has reduced required cooling gas flow; Cold gas enters combustion channels after by pressure stabilizing cavity, in this course can cooling flame cylinder and changeover portion, improved the utilization rate of cold air.2. the version of pressure stabilizing cavity can effectively improve seal support part rigidity; 3. in burner inner liner outside wall surface, fin is set, has effectively strengthened cold side heat convection.
Accompanying drawing explanation
The structural principle schematic diagram of the syndeton of a kind of combustion chamber flame drum with pressure stabilizing cavity that Fig. 1 provides for the utility model and changeover portion sealing.
Fig. 2 is the structure three-dimensional cutaway view with the syndeton of pressure stabilizing cavity.
In figure, symbol description is as follows: 11-burner inner liner; 12-changeover portion; 13-hermetically-sealed construction; 14-seal support part; 15-elastic sealing element; 16-combustion channels; 17-burner inner liner outside wall surface; 19-pressure stabilizing cavity; 20-support member front bulkhead; 22-round platform ladder end wall; 23-support member wall; 24-support member aft bulkhead; 25-stagnation pressure air admission hole; 26-venthole; 27-fin; 28-locating sealing ring; 30-annular seal space; The circular-arc elastic sealing strip of 31-; 32-gap.
The specific embodiment
Below in conjunction with accompanying drawing, principle of the present utility model, structure and the specific embodiment are described further.
The structural principle schematic diagram of the syndeton of a kind of combustion chamber flame drum with pressure stabilizing cavity that Fig. 1 provides for the utility model and changeover portion sealing.This syndeton comprises burner inner liner 11, changeover portion 12 and hermetically-sealed construction 13; Burner inner liner 11 inserts in changeover portions 12, by the internal face of burner inner liner 11 and changeover portion 12, jointly limits combustion channels 16, and hermetically-sealed construction 13 is arranged between burner inner liner 11 and changeover portion 12.Described hermetically-sealed construction 13 comprises seal support part 14 and elastic sealing element 15; Seal support part 14 is stepped, and front end is protruding round platform, and support member front bulkhead 20 is connected on burner inner liner with support member aft bulkhead 24, and seal support part and burner inner liner outside wall surface 17 form the pressure stabilizing cavity 19 of a ladder annular; On round platform ladder end wall 22, along circumferentially at least arranging row's stagnation pressure air admission hole 25, on support member aft bulkhead 24, a discharge pore 26 is circumferentially at least arranged on edge; Stagnation pressure air admission hole 25, venthole 26 are connected with pressure stabilizing cavity 19; Elastic sealing element 15 is arranged on protruding round platform support member wall 23 below, and elastic sealing element 15 forms annular seal space 30 with seal support part 14.
Be positioned in the burner inner liner outside wall surface 17 of pressure stabilizing cavity 19 and be furnished with fin 27.The preferred spacing of fins of fin 27 is high with rib is 5～20 than scope.
Circular-arc elastic sealing strip 31 highest points are limited to changeover portion 12; And when highest point pressurized, can extend to the opposite direction of locating sealing ring 28, play the effect of elastic packing.
Operation principle of the present utility model is as follows:
Refrigerating gas is entered the pressure stabilizing cavity 19 of the ladder annular of hollow by stagnation pressure air admission hole 25, then by venthole 26, enter combustion channels 16, while flowing through pressure stabilizing cavity 19, burner inner liner outside wall surface 17 is played to the cooling effect of convection current, from venthole 26 flows out, again changeover portion 12 is played to the cooling effect of similar air film.Cold airflow is when pressure stabilizing cavity 19, and the fin 27 in burner inner liner outside wall surface 17 plays and strengthens cold air to the cooling effect of burner inner liner outside wall surface 17 convection current.
Some cold air can enter annular seal space 30 by the gap 32 between circular-arc elastic sealing strip 31, and cooling and sealing structure 13 lost efficacy to prevent hermetically-sealed construction, and this part gas that completes cooling effect flows into combustion channels 16 subsequently.
Claims (7)
1. with the combustion chamber flame drum of pressure stabilizing cavity and a syndeton for changeover portion sealing, this syndeton comprises burner inner liner (11), changeover portion (12) and hermetically-sealed construction (13); Burner inner liner (11) inserts in changeover portion (12), by the internal face of burner inner liner (11) and changeover portion (12), jointly limits combustion channels (16), and hermetically-sealed construction (13) is arranged between burner inner liner (11) and changeover portion (12); It is characterized in that: described hermetically-sealed construction (13) comprises seal support part (14) and elastic sealing element (15); Seal support part (14) is stepped, and front end is protruding round platform; Support member front bulkhead (20) is connected on burner inner liner with support member aft bulkhead (24), and seal support part and burner inner liner outside wall surface (17) form the pressure stabilizing cavity (19) of ladder annular; Upper along circumferentially at least arranging row's stagnation pressure air admission hole (25) at protruding round platform ladder end wall (22), upper along circumferentially at least arranging a discharge pore (26) at support member aft bulkhead (24); It is upper that elastic sealing element (15) is arranged on protruding round platform support member wall (23) below, between elastic sealing element (15) and seal support part (14), forms annular seal space (30).
2. the syndeton of a kind of combustion chamber flame drum with pressure stabilizing cavity as claimed in claim 1 and changeover portion sealing, is characterized in that: in the burner inner liner outside wall surface (17) in described pressure stabilizing cavity (19), be furnished with fin (27).
3. the syndeton of a kind of combustion chamber flame drum with pressure stabilizing cavity as claimed in claim 2 and changeover portion sealing, is characterized in that: the spacing of fins of fin in burner inner liner outside wall surface (27) is high with rib is 5～20 than scope.
4. the syndeton of a kind of combustion chamber flame drum with pressure stabilizing cavity as described in claim 1,2 or 3 and changeover portion sealing, is characterized in that: the gross area of described stagnation pressure air admission hole (25) is less than the gross area of venthole (26).
5. the syndeton that a kind of combustion chamber flame drum with pressure stabilizing cavity as claimed in claim 1 and changeover portion seal, it is characterized in that: elastic sealing element (15) is comprised of locating sealing ring (28) and at least one circular-arc elastic sealing strip (31), circular-arc elastic sealing strip is arranged on locating sealing ring, and this locating sealing ring is fixed on seal support part (32).
6. the syndeton of a kind of combustion chamber flame drum with pressure stabilizing cavity as claimed in claim 5 and changeover portion sealing, is characterized in that: the number of described circular-arc elastic sealing strip (31) is between 36～72.
7. the syndeton that a kind of combustion chamber flame drum with pressure stabilizing cavity as described in claim 5 or 6 and changeover portion seal, it is characterized in that: when circular-arc elastic packing strip adoption is more than two during circular-arc elastic sealing strip, the gap between adjacent two circular-arc elastic sealing strips is within the scope of 1mm～3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320490512.1U CN203464335U (en) | 2013-08-12 | 2013-08-12 | Sealed connecting structure of combustion chamber flame tube with pressure stabilizing cavity and transition section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320490512.1U CN203464335U (en) | 2013-08-12 | 2013-08-12 | Sealed connecting structure of combustion chamber flame tube with pressure stabilizing cavity and transition section |
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| Publication Number | Publication Date |
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| CN203464335U true CN203464335U (en) | 2014-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320490512.1U Expired - Lifetime CN203464335U (en) | 2013-08-12 | 2013-08-12 | Sealed connecting structure of combustion chamber flame tube with pressure stabilizing cavity and transition section |
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| CN (1) | CN203464335U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423774A (en) * | 2013-08-12 | 2013-12-04 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Sealed connecting structure of combustion chamber flame tube with pressure stabilizing chamber and transition section |
| CN106894849A (en) * | 2015-12-18 | 2017-06-27 | 安萨尔多能源瑞士股份公司 | Hula seal |
| CN107013338A (en) * | 2015-12-22 | 2017-08-04 | 通用电气公司 | Classification fuel and air injection in the combustion system of combustion gas turbine |
| CN113483361A (en) * | 2021-08-18 | 2021-10-08 | 中国联合重型燃气轮机技术有限公司 | Combustor liner for gas turbine and gas turbine |
-
2013
- 2013-08-12 CN CN201320490512.1U patent/CN203464335U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423774A (en) * | 2013-08-12 | 2013-12-04 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Sealed connecting structure of combustion chamber flame tube with pressure stabilizing chamber and transition section |
| CN103423774B (en) * | 2013-08-12 | 2015-11-11 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | The syndeton that a kind of combustion chamber flame drum and changeover portion seal |
| CN106894849A (en) * | 2015-12-18 | 2017-06-27 | 安萨尔多能源瑞士股份公司 | Hula seal |
| CN106894849B (en) * | 2015-12-18 | 2021-05-04 | 安萨尔多能源瑞士股份公司 | Hula seal |
| CN107013338A (en) * | 2015-12-22 | 2017-08-04 | 通用电气公司 | Classification fuel and air injection in the combustion system of combustion gas turbine |
| CN113483361A (en) * | 2021-08-18 | 2021-10-08 | 中国联合重型燃气轮机技术有限公司 | Combustor liner for gas turbine and gas turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Sealed connecting structure of combustion chamber flame tube with pressure stabilizing chamber and transition section Effective date of registration: 20161104 Granted publication date: 20140305 Pledgee: Tsinghua Holdings Co., Ltd. Pledgor: Beijing Huatsing Gas Turbine & IGCC Technology Co., Ltd. Registration number: 2016990000853 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20191211 Granted publication date: 20140305 Pledgee: Tsinghua Holdings Co., Ltd. Pledgor: Beijing Huatsing Gas Turbine & IGCC Technology Co., Ltd. Registration number: 2016990000853 |