CN104296160A - Flow guide bush of combustion chamber of combustion gas turbine and with cooling function - Google Patents
Flow guide bush of combustion chamber of combustion gas turbine and with cooling function Download PDFInfo
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- CN104296160A CN104296160A CN201410487031.4A CN201410487031A CN104296160A CN 104296160 A CN104296160 A CN 104296160A CN 201410487031 A CN201410487031 A CN 201410487031A CN 104296160 A CN104296160 A CN 104296160A
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- flow deflector
- flow
- water conservancy
- conservancy diversion
- inner liner
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Abstract
The invention discloses a flow guide bush of a combustion chamber of a combustion gas turbine and with a cooling function, and belongs to structural design of combustion chambers of combustion gas turbines. The flow guide bush is characterized in that flow deflectors are arranged on the inner wall face of a flow guide bush cylinder, and the flow deflectors comprise direct flow sections and bent sections; according to the flow direction of air in the flow guide bush, the initial positions of the direct flow sections are located at the upstream ends of mixing holes of a flame tube, and the tail ends of the direct flow sections do not exceed the axial position, corresponding to the flow guide bush cylinder, of a last row of main combustion holes; the initial positions of the bent sections of the flow deflectors are in smooth transition connection with the tail ends of the direct flow sections of the flow deflectors, the ending positions of the bent sections of the flow deflectors are located between the upstream of a locating block and the downstream of the main combustion holes, the bending direction of the bent sections is the same as the rotation direction of combustion gas in the flame tube, and the included angle alpha between the tangential direction of the tail ends of the bent sections and the center line of the flame tube is 5-70 degrees. The flow guide bush has the advantages that air flows inside the flow guide bush can flow evenly, the mechanical strength of the flow guide bush is enhanced, the safety of operation is improved, the service life is prolonged, and meanwhile, the cooling effect of the surface of the flame tube can be effectively improved.
Description
Technical field
The present invention relates to a kind of structural design of gas-turbine combustion chamber, particularly relate to the structure of the water conservancy diversion lining of combustion chamber, belong to gas turbine technology field.
Background technology
Gas turbine is the visual plant of world today's clean utilization fossil energy.The life-span of gas turbine depends primarily on the life-span of its hot-end component, such as the life-span of combustion chamber flame drum.And the life-span of burner inner liner is mainly by the impact of the Temperature Distribution on its surface, therefore scholars takes a large amount of manpower and materials and attempts to solve this difficult problem of Calculating Wall Temperature of Flame Tube, mainly contain two large directions at present, one is find better material, working long hours at higher temperatures; Two is the better cooling structures of design.The former is limited to the progress of material science development, and the breakthrough of material resistance to extreme temperature is very difficult, and latter mainly concentrates in the version on burner inner liner surface, as air film hole, divergence hole, fish scale hole etc.The latter in the past few decades in achieve huge progress, but thing followed structural complexity also makes the processing cost of burner inner liner sharply increase, this is disadvantageous to lifting Gas Turbine Market competitiveness.
In combustion chamber, another one vitals is water conservancy diversion lining, and in traditional design, mostly water conservancy diversion lining is to be formed by connecting by one or more snippets thin cylinder, mainly plays air flow passage.This thin cylinder not only function singleness, and in actual motion, also easily there is the situation of structural strength deficiency.
Summary of the invention
In order to overcome above-mentioned deficiency of the prior art and defect, the present invention proposes a kind of water conservancy diversion lining with the gas-turbine combustion chamber of refrigerating function, make it that water conservancy diversion bush inside uniform stream not only can be made to flow, strengthen the mechanical strength of water conservancy diversion lining, improve the security and service life that run, and significantly can improve the cooling effect on burner inner liner surface, thus overcome the defect of its function singleness.
The technical solution adopted in the present invention is:
Have a water conservancy diversion lining for the gas-turbine combustion chamber of refrigerating function, this water conservancy diversion lining is arranged on the outside of burner inner liner, and is connected with burner inner liner by being arranged on burner inner liner head location block; Burner inner liner outside wall surface is circumferentially provided with many row's blending hole and primary holes, it is characterized in that: described water conservancy diversion lining cylinder inboard wall face is provided with flow deflector, and described flow deflector comprises flow deflector direct current section and flow deflector bending section; According to air-flow direction in water conservancy diversion lining, flow deflector direct current section original position is positioned at the upstream extremity of burner inner liner blending hole, and the end of flow deflector direct current section is no more than last row's primary holes and axial location corresponding to water conservancy diversion lining cylindrical shell; The end of flow deflector bending section original position and flow deflector direct current section is connected smoothly, and the final position of flow deflector bending section is between locating piece upstream and cooling effectiveness downstream of primary jet, and the bending direction of flow deflector bending section is identical with the direction that gas rotary in burner inner liner turns.
Another technical characteristic of the present invention is: the degree of crook of flow deflector bending section is for seamlessly transitting, and flow deflector bending section end tangential direction and burner inner liner centerlines α are 5 ° ~ 70 °; Flow deflector bending section end tangential direction and burner inner liner centerlines α are preferably 10 °, 20 °, 30 °, 40 °, 50 ° or 60 °.
The number of flow deflector of the present invention is N times that often arranges primary holes number, and N is positive integer, and 1≤N≤5; The number of described flow deflector is preferably 1,2 or 3 times for often arranging primary holes number.
Flow deflector of the present invention adopts straight thin-slab structure, and thickness is 0.1 ~ 4mm; The thickness of flow deflector is preferably 1mm, 2mm or 3mm.
The present invention has the following advantages and the technique effect of high-lighting: 1. due to the existence of flow deflector bending section, define bent fan passage, the air-flow flowed in the channel is so just forced to flow according to the bending direction of bending section, namely the direction of rotation against burner inner liner flame flows, that is to say to flow in the direction against burner inner liner wall high-temperature region, therefore compared with traditional water conservancy diversion lining, the flow distance of gas adds, and increase the area carrying out heat exchange with gas, thus improve heat exchange efficiency, and then improve the cooling effect of burner inner liner wall high-temperature region, reduce the temperature of burner inner liner, extend the service life of burner inner liner.2. because the present invention is provided with multiple flow deflector at the internal face of water conservancy diversion lining, greatly strengthen the mechanical strength of water conservancy diversion lining, thus make water conservancy diversion lining in the gas turbine course of work, further increase security and the service life of operation.3. water conservancy diversion lining provided by the invention not only can limit the circumferential flow of air-flow in water conservancy diversion lining, realizes the Uniform Flow of water conservancy diversion bush inside air-flow, and then makes burner inner liner internal-combustion more stable.
Accompanying drawing explanation
Fig. 1 is the chamber structure schematic diagram of gas-turbine combustion chamber of the water conservancy diversion lining proposed containing the present invention.
Fig. 2 is the three-dimensional cutaway view of Fig. 1.
Number in the figure: 1-water conservancy diversion lining; 2-burner inner liner; 3-end cap; 4-locating piece; 5-nozzle; 6-incoming air; 7-fuel gas; 11-flow deflector; 21-primary holes; 22-blending hole; 23-head airport; 110-direct current section; 111-bending section.
Detailed description of the invention
Below in conjunction with accompanying drawing, principle of the present invention, structure and embodiment are described further.
Fig. 1 is the chamber structure schematic diagram of gas-turbine combustion chamber of the water conservancy diversion lining proposed containing the present invention, containing water conservancy diversion lining 1, burner inner liner 2, end cap 3, locating piece 4 and nozzle 5; Water conservancy diversion lining is formed by connecting by one or more snippets cylinder, and water conservancy diversion lining 1 is connected with end cap 3 in front end.
This water conservancy diversion lining is arranged on the outside of burner inner liner 2, and is connected with burner inner liner by being arranged on burner inner liner head location block 4; Burner inner liner outside wall surface is circumferentially provided with many row's blending hole 22 and primary holes 21; Described water conservancy diversion lining cylinder inboard wall face is provided with flow deflector 11, can welds with water conservancy diversion lining cylinder inboard wall face or integratedly to cast; Described flow deflector comprises flow deflector direct current section 110 and flow deflector bending section 111; According to air-flow direction in water conservancy diversion lining, flow deflector direct current section original position is positioned at the upstream extremity of burner inner liner blending hole 22, and the end of flow deflector direct current section is no more than last row's primary holes 21 and the axial location corresponding to water conservancy diversion lining cylindrical shell; The end of flow deflector bending section original position and flow deflector direct current section is connected smoothly, the final position of flow deflector bending section is between locating piece 4 upstream and primary holes 21 downstream, namely flow deflector 11 should not interfered with locating piece 4, and flow deflector can not drop on primary holes 21 or blending hole 22 region in the projection of radial direction.The bending direction of flow deflector bending section should be identical with the direction that gas rotary in burner inner liner turns.
The degree of crook of flow deflector bending section is for seamlessly transitting, and flow deflector bending section end tangential direction and burner inner liner centerlines α are 5 ° ~ 70 °; Flow deflector bending section end tangential direction and burner inner liner centerlines α are preferably 10 °, 20 °, 30 °, 40 °, 50 ° or 60 °.The number stating flow deflector is N times that often arranges primary holes number, and N is positive number, and 1≤N≤5; Preferred version is: the number of described flow deflector is preferably 1,2 or 3 times for often arranging primary holes number, and is uniformly distributed circumferentially.Described flow deflector adopts straight thin-slab structure, and thickness is 0.1 ~ 4mm; The thickness of flow deflector is preferably 1mm, 2mm or 3mm; Flow deflector 11 is 1 ~ 10mm with the radial spacing of the outer surface of burner inner liner 2 outer surface.
Working mechanism of the present invention and the course of work as follows:
As shown in Figure 1, the circular passage between water conservancy diversion lining cylindrical shell and burner inner liner 2 is divided into sector channel the same number of with flow deflector 11 by flow deflector 11.Again due to the existence of flow deflector direct current section 110 and flow deflector bending section 111, sector channel can be divided into again direct current sector channel and bent fan passage.Incoming air 6 flows in the circular passage between water conservancy diversion lining cylindrical shell and burner inner liner, reverse flow is to head of combustion chamber, then to flow into by flow deflector direct current section 110 split in the direct current sector channel formed, in this process, fraction flows into burner inner liner inside from blending hole 22; To flow into again subsequently by flow deflector bending section 111 split in the bent fan passage formed, in this process, fraction flows into burner inner liner inside from primary holes 21; Last remaining air flows into burner inner liner head from head airport 23.Carry out mixing mixing combustion with the fuel gas 7 being entered burner inner liner head by nozzle 5 after incoming air 6 enters burner inner liner inside.
In current Combustion chamber design, the air of burner inner liner head and fuel gas flow mainly with certain cyclonic form greatly, and better to organize burning and to keep combustion stability, therefore the flame of burner inner liner inside also exists with the form of same direction of rotation.But such flame form can cause burner inner liner wall to exist to match the high-temperature region distributed with flame structure, and high-temperature region mainly concentrates on the burner inner liner wall near primary holes 21.In the technical scheme that the present invention proposes, due to the existence of flow deflector bending section 111, define bent fan passage, the air-flow flowed in the channel is so just forced to flow according to the bending direction of bending section 111, flow against the direction of rotation of burner inner liner 2 flame, also be flow against the direction of burner inner liner wall high-temperature region, this existing flowing for traditional water conservancy diversion lining, three aspects are had to improve: 1) flow distance of gas increases, and can increase with the heat-exchange time in hot wall face; 2) thermal conductivity factor of gas and burner inner liner wall can increase; 3) flow deflector increases the area carrying out heat exchange with gas.So, greatly can improve the cooling effect of burner inner liner wall high-temperature region, thus reduce the temperature of burner inner liner, extend the life-span of burner inner liner 2, from but water conservancy diversion lining has refrigerating function, meanwhile, due to the existence of flow deflector, also greatly strengthen the structural strength of water conservancy diversion lining, thus make water conservancy diversion lining have better security and long-life in the gas turbine course of work.
Claims (8)
1. have a water conservancy diversion lining for the gas-turbine combustion chamber of refrigerating function, this water conservancy diversion lining is arranged on the outside of burner inner liner (2), and is connected with burner inner liner by being arranged on burner inner liner head location block (4); Burner inner liner outside wall surface is circumferentially provided with and arranges blending hole (22) and primary holes (21) more, it is characterized in that: described water conservancy diversion lining cylinder inboard wall face is provided with multiple flow deflector (11), and described flow deflector comprises flow deflector direct current section and flow deflector bending section; According to air-flow direction in water conservancy diversion lining, flow deflector direct current section original position is positioned at the upstream extremity of burner inner liner blending hole (22), and the end of flow deflector direct current section is no more than last row's primary holes (21) and the axial location corresponding to water conservancy diversion lining cylindrical shell; The end of flow deflector bending section original position and flow deflector direct current section is connected smoothly, the final position of flow deflector bending section is positioned between locating piece (4) upstream and primary holes (21) downstream, and the bending direction of flow deflector bending section is identical with the direction that gas rotary in burner inner liner turns.
2. according to a kind of water conservancy diversion lining with the gas-turbine combustion chamber of refrigerating function according to claim 1, it is characterized in that: the degree of crook of flow deflector bending section is for seamlessly transitting, and flow deflector bending section end tangential direction and burner inner liner centerlines α are 5 ° ~ 70 °.
3. according to a kind of water conservancy diversion lining with the gas-turbine combustion chamber of refrigerating function according to claim 1, it is characterized in that: described flow deflector (11) is 1 ~ 10mm with the radial spacing of burner inner liner (2) outer surface.
4. according to claim according to a kind of water conservancy diversion with the gas-turbine combustion chamber of refrigerating function according to claim 1
Lining, is characterized in that: described flow deflector is straight thin-slab structure, and thickness is 0.1 ~ 4mm.
5. according to a kind of water conservancy diversion lining with the gas-turbine combustion chamber of refrigerating function according to claim 1, it is characterized in that: the number of described flow deflector is N times that often arranges primary holes number, and N is positive number, and 1≤N≤5.
6. according to a kind of water conservancy diversion lining with the gas-turbine combustion chamber of refrigerating function described in the arbitrary claim of Claims 1 to 5, it is characterized in that: flow deflector bending section end tangential direction and burner inner liner centerlines α are 10 °, 20 °, 30 °, 40 °, 50 ° or 60 °.
7. according to a kind of water conservancy diversion lining with the gas-turbine combustion chamber of refrigerating function described in the arbitrary claim of Claims 1 to 5, it is characterized in that: the number of described flow deflector is 1,2 or 3 times that often arranges primary holes number.
8. a kind of water conservancy diversion lining with the gas-turbine combustion chamber of refrigerating function according to the arbitrary claim of Claims 1 to 5, is characterized in that: the thickness of flow deflector is 1mm, 2mm or 3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410487031.4A CN104296160A (en) | 2014-09-22 | 2014-09-22 | Flow guide bush of combustion chamber of combustion gas turbine and with cooling function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410487031.4A CN104296160A (en) | 2014-09-22 | 2014-09-22 | Flow guide bush of combustion chamber of combustion gas turbine and with cooling function |
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| CN104296160A true CN104296160A (en) | 2015-01-21 |
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| CN201410487031.4A Pending CN104296160A (en) | 2014-09-22 | 2014-09-22 | Flow guide bush of combustion chamber of combustion gas turbine and with cooling function |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105505416A (en) * | 2015-12-18 | 2016-04-20 | 江苏鼎新环保科技有限公司 | Zoned-temperature-control rotary continuous pyrolyzing and carbonizing device for biomass |
| CN107702144A (en) * | 2017-09-05 | 2018-02-16 | 中国联合重型燃气轮机技术有限公司 | Burner and the gas turbine with the burner |
| CN108131399A (en) * | 2017-11-20 | 2018-06-08 | 北京动力机械研究所 | A kind of engine shaft bearing cooling structure |
| CN112240569A (en) * | 2020-09-29 | 2021-01-19 | 南京航空航天大学 | Flame stabilizer |
| CN112902226A (en) * | 2021-03-11 | 2021-06-04 | 西北工业大学 | Fuel oil evaporation type flame tube |
| CN113483362A (en) * | 2021-08-18 | 2021-10-08 | 中国联合重型燃气轮机技术有限公司 | Flame tube and gas turbine |
| CN114484500A (en) * | 2022-01-27 | 2022-05-13 | 北京航空航天大学 | Uniform flow sleeve and combustion chamber head structure |
| CN114857619A (en) * | 2022-04-29 | 2022-08-05 | 江苏中科能源动力研究中心 | Micro-mixing combustion chamber of gas turbine |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105505416A (en) * | 2015-12-18 | 2016-04-20 | 江苏鼎新环保科技有限公司 | Zoned-temperature-control rotary continuous pyrolyzing and carbonizing device for biomass |
| CN107702144A (en) * | 2017-09-05 | 2018-02-16 | 中国联合重型燃气轮机技术有限公司 | Burner and the gas turbine with the burner |
| CN107702144B (en) * | 2017-09-05 | 2020-03-10 | 中国联合重型燃气轮机技术有限公司 | Combustor and gas turbine with same |
| CN108131399A (en) * | 2017-11-20 | 2018-06-08 | 北京动力机械研究所 | A kind of engine shaft bearing cooling structure |
| CN112240569A (en) * | 2020-09-29 | 2021-01-19 | 南京航空航天大学 | Flame stabilizer |
| CN112240569B (en) * | 2020-09-29 | 2022-02-11 | 南京航空航天大学 | Flame stabilizer |
| CN112902226A (en) * | 2021-03-11 | 2021-06-04 | 西北工业大学 | Fuel oil evaporation type flame tube |
| CN113483362A (en) * | 2021-08-18 | 2021-10-08 | 中国联合重型燃气轮机技术有限公司 | Flame tube and gas turbine |
| CN114484500A (en) * | 2022-01-27 | 2022-05-13 | 北京航空航天大学 | Uniform flow sleeve and combustion chamber head structure |
| CN114484500B (en) * | 2022-01-27 | 2022-12-20 | 北京航空航天大学 | Uniform flow sleeve and combustion chamber head structure |
| CN114857619A (en) * | 2022-04-29 | 2022-08-05 | 江苏中科能源动力研究中心 | Micro-mixing combustion chamber of gas turbine |
| CN114857619B (en) * | 2022-04-29 | 2024-01-26 | 江苏中科能源动力研究中心 | Micro-mixed combustion chamber of gas turbine |
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Application publication date: 20150121 |