CN103398398B - The double containment syndeton of a kind of gas-turbine combustion chamber burner inner liner and changeover portion - Google Patents
The double containment syndeton of a kind of gas-turbine combustion chamber burner inner liner and changeover portion Download PDFInfo
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- CN103398398B CN103398398B CN201310349647.0A CN201310349647A CN103398398B CN 103398398 B CN103398398 B CN 103398398B CN 201310349647 A CN201310349647 A CN 201310349647A CN 103398398 B CN103398398 B CN 103398398B
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- elastic sealing
- changeover portion
- inner liner
- burner inner
- preposition
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 34
- 238000007789 sealing Methods 0.000 claims abstract description 105
- 238000001816 cooling Methods 0.000 claims abstract description 47
- 238000010276 construction Methods 0.000 claims abstract description 30
- 238000012856 packing Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 6
- 239000000567 combustion gas Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
A double containment syndeton for gas-turbine combustion chamber burner inner liner and changeover portion, relates to the structural design of gas-turbine combustion chamber.This double containment syndeton comprises burner inner liner, changeover portion and hermetically-sealed construction; Burner inner liner inserts in changeover portion, and jointly limit combustion channels by the internal face of burner inner liner and changeover portion, hermetically-sealed construction is arranged between burner inner liner and changeover portion; Hermetically-sealed construction comprises seal support part, preposition elastic sealing element and rearmounted preposition elastic sealing element.The present invention adopts the version of preposition and rearmounted two-stage elastic sealing element and corresponding suitable passage cooling structure, make cold air by cooling duct and annular seal space cooling flame cylinder, changeover portion and hermetically-sealed construction respectively, the hermetically-sealed construction between burner inner liner and changeover portion is made to play sealing, cooling dual-use function, the sealing function that two-stage elastic sealing element strengthens hermetically-sealed construction is set, cold air is passed through more easy to control, and reduce the thorough possibility lost efficacy of single elastic sealing element wearing and tearing.
Description
Technical field
The present invention relates to the structural design of gas-turbine combustion chamber, particularly relate to the hermetically-sealed construction that combustion chamber flame drum is connected with changeover portion, belong to chain drive technical field.
Background technology
Gas turbine is the indispensable great chain drive of energy field.Combustion chamber is as one of the three large core components of gas turbine, and its task is heating working medium, is the heat energy of high-temperature fuel gas by the chemical energy of fuel, and the combustion gas that formation temperature and temperature field all meet the demands, then delivers in turbine and do merit.The structure of combustion chamber generally comprises the parts such as shell, spray group, burner inner liner and changeover portion, and wherein the coupling part of burner inner liner and changeover portion is provided with hermetically-sealed construction usually.
The effect of hermetically-sealed construction is to prevent air from leaking in combustion channels in less desirable position, but complete hermetic hermetically-sealed construction implements very difficult, usually adopt at present and have a small amount of hermetically-sealed construction leaked, this leakage can play the effect of cooling in a suitable case.Hermetically-sealed construction is owing to standing the HTHP of combustion gas inside combustion channels, and it there is high thermograde and pressure changes, and it is very important for therefore obtaining suitable cooling.
Due to the reason such as machining accuracy and thermal expansion deformation, the aisle spare that in actual moving process, hermetically-sealed construction limits is difficult to obtain guarantee, thus result through the cold air flow that hermetically-sealed construction enters combustion zone and easily change, affect the cooling performance of burner inner liner and changeover portion junction, the Temperature Distribution of expectation may do not reached, occur various problems and breakdowns.
Managed in prior art to avoid above-mentioned Problems existing as far as possible, double-wall structure is set to as Chinese patent literature (publication number is CN101713539A) discloses a kind of wall by burner inner liner junction, and adopt impinging cooling to play main cooling effect, and elastic sealing element plays main seal effect.Although the tolerance by the elastic sealing element of hermetically-sealed construction in this technical scheme is very little, but still be have cold air to pass through and wayward, and elastic sealing element is vulnerable part, its damage will directly have influence on life-span of combustion chamber and time between overhauls(TBO) etc.
Summary of the invention
For solving problems of the prior art, the object of this invention is to provide the two-stage hermetically-sealed construction that a kind of gas-turbine combustion chamber burner inner liner is connected with changeover portion, cold air is passed through more easy to control, reduce the impact of the unfavorable factor that may cause after adopting single elastic sealing element wear out failure simultaneously.
The technical solution adopted in the present invention is as follows:
A double containment syndeton for gas-turbine combustion chamber burner inner liner and changeover portion, this syndeton comprises burner inner liner, changeover portion and hermetically-sealed construction; Described burner inner liner inserts in changeover portion, and form combustion channels by the internal face of burner inner liner and changeover portion, hermetically-sealed construction is arranged between burner inner liner and changeover portion; , hermetically-sealed construction is arranged between burner inner liner and changeover portion; It is characterized in that: the rearmounted elastic sealing element that described hermetically-sealed construction comprises seal support part, is arranged on the preposition elastic sealing element on burner inner liner and is arranged on changeover portion; Described seal support part is arranged in burner inner liner outside wall surface, and leaves formation cooling duct, gap with outer wall, and seal support part at least arranges row's air admission hole along the upstream circumference of gas flow in combustion channels, and air admission hole is connected with cooling duct; Described preposition elastic sealing element and seal support part form preposition annular seal space, and rearmounted elastic sealing element and changeover portion form rearmounted annular seal space.
Preferred version of the present invention is: in described cooling duct, arrange two or more dividing plate vertically, and cooling duct being divided into section is several fan-shaped subchannels.The cross-sectional area of described cooling duct is less than the gross area of described air admission hole.
Another preferred version of the present invention is: described preposition elastic sealing element is made up of preposition locating sealing ring and at least one preposition arc-shaped elastic sealing strip, preposition arc-shaped elastic sealing strip is arranged on preposition locating sealing ring, and this preposition locating sealing ring is fixed on seal support part; Rearmounted elastic sealing element is made up of rearmounted locating sealing ring and at least one rearmounted arc-shaped elastic sealing strip, and rearmounted arc-shaped elastic sealing strip is arranged on rearmounted locating sealing ring, and this rearmounted locating sealing ring is fixed on the inwall of changeover portion.
Another preferred version of the present invention is: described preposition arc-shaped elastic sealing strip and rearmounted arc-shaped elastic sealing strip number are all between 36 ~ 72.When preposition arc-shaped elastic sealing strip or rearmounted arc-shaped elastic packing strip adoption two or more arc-shaped elastic sealing strip, the gap between adjacent two preposition arc-shaped elastic sealing strips or the gap between adjacent two rearmounted arc-shaped elastic sealing strips are within the scope of 1mm ~ 3mm.
This invention compared with prior art, have the following advantages and high-lighting effect: the present invention is by arranging corresponding suitable cooling duct and adopting the version that two-stage elastic sealing element seals, make the hermetically-sealed construction between burner inner liner and changeover portion play sealing, cooling dual-use function, the controllability of cooling performance strengthens; Two the elastic sealing element structures arranging two-stage play safety effect to contingent damage, effectively reduce the impact of the unfavorable factor that may cause after adopting the wearing and tearing of single elastic sealing element thoroughly to lose efficacy; Cooling duct dividing plate is divided into some fan-shaped subchannels and corresponding with air admission hole position, cold air flow velocity in passage is increased, heat convection strengthens, more be applicable to the heat taking away junction flame tube wall, effective cooling burner inner liner wall herein, the flowing that simultaneously can also make it to flow in combustion channels is more regular, forms air film thus one section of changeover portion wall after cooling.
Accompanying drawing explanation
Fig. 1 is the structural principle schematic diagram of the double containment syndeton of a kind of gas-turbine combustion chamber burner inner liner provided by the invention and changeover portion.
Fig. 2 is the structure three-dimensional sectional view of double containment syndeton.
Fig. 3 is the structural representation that cooling duct is divided into several subchannels.
In figure, symbol description is as follows: 11-burner inner liner; 13-changeover portion; 21-hermetically-sealed construction; 32-seal support part; The preposition elastic sealing element of 33-; The rearmounted elastic sealing element of 34-; 15-combustion channels; 42-air admission hole; 44-dividing plate; 16-cooling duct; 47-burner inner liner outside wall surface; 48-changeover portion internal face; The preposition locating sealing ring of 56-; The preposition arc-shaped elastic sealing strip of 57-; Gap between the preposition sealing strip of 58-; The preposition annular seal space of 59-; The rearmounted locating sealing ring of 63-; The rearmounted arc-shaped elastic sealing strip of 64-; Gap between the rearmounted sealing strip of 65-; The rearmounted annular seal space of 66-.
Detailed description of the invention
Below in conjunction with accompanying drawing, principle of the present invention, structure and detailed description of the invention are described further.
Fig. 1 is the structural principle schematic diagram of the double containment syndeton of a kind of gas-turbine combustion chamber burner inner liner provided by the invention and changeover portion.This syndeton comprises burner inner liner 11, changeover portion 13 and hermetically-sealed construction 21; Burner inner liner is inserted 11 and is entered in changeover portion 13, and form combustion channels 15 by the internal face of burner inner liner 11 and changeover portion 13, hermetically-sealed construction 21 is arranged between burner inner liner 11 and changeover portion 13.
The rearmounted elastic sealing element 34 that hermetically-sealed construction 21 comprises seal support part 32, is arranged on the preposition elastic sealing element 33 on burner inner liner and is arranged on changeover portion; Seal support part 32 is arranged in burner inner liner outside wall surface 47, and leave formation cooling duct, gap 16 with outer wall, seal support part at least arranges row's air admission hole 42 along the upstream circumference of gas flow in combustion channels 15, and air admission hole 42 is connected with cooling duct 16; Described preposition elastic sealing element and seal support part form preposition annular seal space 59, and rearmounted elastic sealing element and changeover portion form rearmounted annular seal space 66.
Air admission hole 42 is connected with cooling duct 16; Preposition elastic sealing element and support member form preposition annular seal space 59, and rearmounted elastic sealing element and changeover portion form rearmounted annular seal space 66.Cold air enters the cooling duct 16 of corresponding restriction and finally flows into combustion channels 15, first plays convection current cooling to burner inner liner outside wall surface 47, then changeover portion internal face 48 is played to the effect of similar gaseous film control.
Arrange two or more dividing plate 44 vertically in cooling duct 16, cooling duct being divided into section is fan-shaped several subchannels (see Fig. 2, Fig. 3).
Preposition elastic sealing element 33 is made up of preposition locating sealing ring 56 and at least one preposition arc-shaped elastic sealing strip 57, and preposition arc-shaped elastic sealing strip is arranged on preposition locating sealing ring, and this preposition locating sealing ring is fixed on seal support part 32; Rearmounted elastic sealing element 34 is made up of rearmounted locating sealing ring 63 and at least one rearmounted arc-shaped elastic sealing strip 64, rearmounted arc-shaped elastic sealing strip is arranged on rearmounted locating sealing ring 63, and this rearmounted locating sealing ring is fixed on (see Fig. 2) on the inwall of changeover portion.Preposition arc-shaped elastic sealing strip 57 and the preferred number of rearmounted arc-shaped elastic sealing strip 64 are all between 36 ~ 72.When preposition arc-shaped elastic sealing strip or rearmounted arc-shaped elastic packing strip adoption two or more arc-shaped elastic sealing strip, the gap between adjacent two preposition arc-shaped elastic sealing strips or the gap between adjacent two rearmounted arc-shaped elastic sealing strips are within the scope of 1mm ~ 3mm.
Preposition arc-shaped elastic sealing strip 57 highest point is limited to changeover portion internal face 48, when highest point pressurized, can extend, play the effect of elastic packing to the opposite direction of preposition locating sealing ring 56; Rearmounted arc-shaped elastic sealing strip 64 highest point is limited to seal support part 32, when highest point pressurized, can extend, play the effect of elastic packing to the opposite direction of rearmounted locating sealing ring 63.
Operation principle of the present invention is as follows:
Cold air enters preposition annular seal space 59 by air admission hole 42 by the gap 58 between preposition arc-shaped elastic sealing strip, and cooling and sealing structure lost efficacy to prevent hermetically-sealed construction, and this part gas completing cooling effect continues flowing subsequently to rearmounted elastic sealing element 34 direction.
The cold air flowed out by the gap between preposition seal 33 can be entered rearmounted annular seal space 66 by the gap 65 between rearmounted arc-shaped elastic sealing strip, cooling and sealing structure lost efficacy to prevent hermetically-sealed construction, and this part gas completing cooling effect flows into combustion channels 15 subsequently.
Preposition elastic sealing element 33 forms two-stage sealing function with rearmounted elastic sealing element 34, two-stage sealing makes by cold air flow therebetween very little, sealing effectiveness is fine, thus the effect of cooling more relies on the cold air entered from air admission hole 42, cold air finally enters combustion channels 15 by cooling duct 16, here cold air flow is limited by the discharge area of cooling duct 16, the perforated area of the air admission hole 42 on seal support part needs the discharge area coordinating cooling duct 16, namely the cross-sectional area of cooling duct 16 is less than the gross area of described air admission hole 42, the cold air in passage is made to have higher flow velocity, cooling flame drum outer wall face 47 is come to reach the convection current cooling performance possessed in passage.Cooling duct dividing plate is divided into some fan-shaped subchannels and corresponding with air admission hole position, the flowing that can also make it in rear inflow combustion channels is more regular, forms air film thus one section of changeover portion wall after cooling.
Claims (5)
1. a double containment syndeton for gas-turbine combustion chamber burner inner liner and changeover portion, this syndeton comprises burner inner liner (11), changeover portion (13) and hermetically-sealed construction (21); Described burner inner liner (11) inserts in changeover portion (13), the internal face of burner inner liner (11) and changeover portion (13) forms combustion channels (15), and hermetically-sealed construction (21) is arranged between burner inner liner (11) and changeover portion (13); It is characterized in that: the rearmounted elastic sealing element (34) that described hermetically-sealed construction comprises seal support part (32), is arranged on the preposition elastic sealing element (33) on burner inner liner and is arranged on changeover portion; Described seal support part (32) is arranged in burner inner liner outside wall surface (47), and leave formation cooling duct, gap (16) with outer wall, seal support part at least arranges row's air admission hole (42) along the upstream circumference of gas flow in combustion channels (15), and air admission hole (42) is connected with cooling duct (16); Described preposition elastic sealing element and seal support part form preposition annular seal space (59), and rearmounted elastic sealing element and changeover portion form rearmounted annular seal space (66); Described preposition elastic sealing element (33) is made up of preposition locating sealing ring (56) and at least one preposition arc-shaped elastic sealing strip (57), preposition arc-shaped elastic sealing strip is arranged on preposition locating sealing ring, and this preposition locating sealing ring is fixed on seal support part (32); Rearmounted elastic sealing element (34) is made up of rearmounted locating sealing ring (63) and at least one rearmounted arc-shaped elastic sealing strip (64), rearmounted arc-shaped elastic sealing strip is arranged on rearmounted locating sealing ring, and this rearmounted locating sealing ring is fixed on the inwall of changeover portion.
2. the double containment syndeton of a kind of gas-turbine combustion chamber burner inner liner as claimed in claim 1 and changeover portion, it is characterized in that: in described cooling duct (16), arrange two or more dividing plate (44) vertically, cooling duct being divided into section is several fan-shaped subchannels.
3. the double containment syndeton of a kind of gas-turbine combustion chamber burner inner liner as claimed in claim 1 or 2 and changeover portion, is characterized in that: the cross-sectional area of described cooling duct (16) is less than the gross area of described air admission hole (42).
4. the double containment syndeton of a kind of gas-turbine combustion chamber burner inner liner as claimed in claim 1 and changeover portion, is characterized in that: described preposition arc-shaped elastic sealing strip (57) and the number of rearmounted arc-shaped elastic sealing strip (64) are all between 36 ~ 72.
5. a kind of gas-turbine combustion chamber burner inner liner as described in claim 1 or 4 and the double containment syndeton of changeover portion, it is characterized in that: when preposition arc-shaped elastic sealing strip or rearmounted arc-shaped elastic packing strip adoption two or more arc-shaped elastic sealing strip, the gap between adjacent two preposition arc-shaped elastic sealing strips or the gap between adjacent two rearmounted arc-shaped elastic sealing strips are within the scope of 1mm ~ 3mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310349647.0A CN103398398B (en) | 2013-08-12 | 2013-08-12 | The double containment syndeton of a kind of gas-turbine combustion chamber burner inner liner and changeover portion |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310349647.0A CN103398398B (en) | 2013-08-12 | 2013-08-12 | The double containment syndeton of a kind of gas-turbine combustion chamber burner inner liner and changeover portion |
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| Publication Number | Publication Date |
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| CN103398398A CN103398398A (en) | 2013-11-20 |
| CN103398398B true CN103398398B (en) | 2016-01-20 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104359127A (en) * | 2014-10-31 | 2015-02-18 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Channel type cooling structure of flame tube in combustion chamber of gas turbine |
| EP3073057B1 (en) * | 2015-03-27 | 2019-05-15 | Ansaldo Energia Switzerland AG | Gas turbine hula seal and corresponding method |
| CN104864416A (en) * | 2015-04-22 | 2015-08-26 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Connecting structure of combustion liner and transition section |
| JP6779098B2 (en) * | 2016-10-24 | 2020-11-04 | 三菱パワー株式会社 | Gas turbine combustor |
| CN111750380B (en) * | 2019-03-28 | 2021-09-21 | 中国航发湖南动力机械研究所 | Flame tube outlet connecting device |
| CN114412645B (en) * | 2021-12-26 | 2023-01-31 | 西北工业大学 | Cooling structure and cooling method of laminated plate with slit ribs for combustion chamber of turbofan engine |
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| CN103398398A (en) | 2013-11-20 |
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Denomination of invention: Double-seal connection structure of flame tube and transition section of combustion gas turbine combustion chamber Effective date of registration: 20161104 Granted publication date: 20160120 Pledgee: Tsinghua Holdings Co., Ltd. Pledgor: Beijing Huatsing Gas Turbine & IGCC Technology Co., Ltd. Registration number: 2016990000853 |
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