CN105605605A - Anti-vibration cooling wall of ground gas turbine combustion chamber - Google Patents
Anti-vibration cooling wall of ground gas turbine combustion chamber Download PDFInfo
- Publication number
- CN105605605A CN105605605A CN201610048079.4A CN201610048079A CN105605605A CN 105605605 A CN105605605 A CN 105605605A CN 201610048079 A CN201610048079 A CN 201610048079A CN 105605605 A CN105605605 A CN 105605605A
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- CN
- China
- Prior art keywords
- wall
- combustion chamber
- cooling
- cooling wall
- vibrationproof
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M5/00—Casings; Linings; Walls
- F23M5/08—Cooling thereof; Tube walls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
Abstract
The invention provides an anti-vibration cooling wall of a ground gas turbine combustion chamber. The anti-vibration cooling wall comprises an inner wall and an outer wall, wherein the inner wall and the outer wall are connected by using screw type spring steel with incremental diameter and are arranged in a certain manner; a communicated cavity is formed between the inner wall and the outer wall. According to the anti-vibration cooling wall, by changing the wall surface structure of a main combustion chamber flame tube, the propagation of sound wave in a main combustion chamber is absorbed and changed, and then the phase difference between oscillation of sound pressure and fluctuation of heat release rate cannot remain unchanged all the time; meanwhile, the spring has a trimmer pressure effect, so that the occurrence of thermo-acoustic oscillation is effectively prevented. Through the arrangement of the spring in the anti-vibration cooling wall, the heat convection area of cooling air is increased, the cooling efficiency of cooling air is improved, and the anti-vibration cooling wall has a wide application prospect.
Description
Technical field
The present invention relates to gas turbine field, in particular to the vibrationproof cooling wall of a kind of ground combustion machine combustion chamber.
Background technology
Gas turbine is the crystallization of modern industry achievement, and combustion chamber is the vitals of gas turbine, combustion chamber mainFunction is to make the chemical energy of fuel be converted into heat energy. Combustion chamber, in the process of fuel combustion, often can produce some problems,As oscilatory occurrence. When hugging occurs, can follow the significantly vibration of thermal discharge and pressure, produce huge noise,Cause burner high vibration, affect the normal work of burner, when serious, even can cause the damage of system unitWound is destroyed. In general, in the time that disturbance reaches chemical reaction and releases energy, the amplitude of the pressure fluctuation producing justBe equivalent to combustion chamber average pressure peak amplitude. This significantly pressure fluctuation is easy to cause the heavy damage of structure.
In the combustion process of gas-turbine combustion chamber, due to the interaction of fuel combustion heat liberation rate, heat release rate and acoustic pressure fluctuation,There will be hot sound wild effect, it shows as pressure vibration increase, produces noise, when serious, may destroy combustion chamberStructure. Operation and the security of the generation of hugging to Actual combustion chamber has a huge impact. Hugging meetingCause combustion chambers burn stability decreases, when serious, will directly cause stopping working, combustion chamber is had to disastrous effect.Hugging worsens combustion position, and the pressure fluctuation that hugging causes likely destroys the structure of combustion chamber. Therefore,Constantly carry out the research about hugging both at home and abroad, in the mechanism research of hugging, had many progress now,But aspect the prevention of gas turbine main chamber hugging, there is not temporarily more satisfactory scheme.
Low-frequency oscillation in combustion chamber burning is normally by fuel in combustion chamber combustion heat release rate and the acoustic pressure mutual lotus root of fluctuatingClose, generation self-oscillation causes. Its general mechanism is if burning rate of heat release has a small variation, thisSmall variation can produce acoustic pressure disturbance, and sound wave, in burning indoor propagation, returns after running into wall, conversely impact againFuel supply rate, thus combustion heat release rate is changed again. Burn heat release and pressure oscillation influences each other, and works as phasePhase mutual excitation when position is appropriate, forms positive feedback loop. Modern gas turbine generally all requires high temperature rise, and high temperature riseCombustion chamber wall surface make term durability gas turbine flame barrel overheated, so generally all can be taked certain cooling provision. Modern combustionIt is cooling that gas turbine combustion chamber's wall portions takes unsteady wall-like structure to carry out, and it is cooling that part takes maze-type structure to carry out,Although these two kinds of types of cooling can obtain good cooling effect, the combustion chamber wall surface knot of this constructed in two waysStructure is relative complex all, and difficulty of processing is large.
Summary of the invention
The technical problem to be solved in the present invention is to provide the vibrationproof cooling wall of a kind of ground combustion machine combustion chamber, and this vibrationproof is coolingWall energy is effectively prevented the generation of oscilatory occurrence in ground gas turbine combustion chamber, and can improve the cooling effect of cold gasRate.
The present invention solves the problems of the technologies described above by following technological means: the vibrationproof cooling wall of a kind of ground combustion machine combustion chamber,Described vibrationproof cooling wall comprises inner and outer wall, and the spiral spring steel by Diameter Gradual Change between described inner and outer wall connectsConnect, described spiral spring steel is arranged according to certain way, forms the cavity being communicated with between described inner and outer wall.
Vibrationproof cooling wall of the present invention has double-decker, forms the cavity being communicated with between two walls, is convenient to pass into cold air coldBut, simultaneously spring has increased heat exchange area, has higher cooling effectiveness, and the diameter of the present invention by linking springs graduallyThe variation of the hand of spiral of increasing and spring has absorbed a part of sound wave, and has the reflection of change sound wave in combustion chamber concurrentlyPropagate, thereby the phase difference that oscillation of sound pressure and HRR are fluctuateed can be not constant all the time, and then prevent the burnup of vibratingAppearance.
As improvement of the present invention: be provided with multiple air film holes on described inwall, described air film hole is communicated with described cavity.Have most of heat to be transmitted in cavity by connecting the numerous springs of inwall, cold gas is carried out in advance by heat convectionCooling, then it is cooling to carry out secondary by air film hole, has effectively prevented the hot erosion of combustion gas to chamber wall.
As the preferred embodiment of the present invention: the linking springs in described cavity, it is one large that initial diameter can be set toOne is little, on axial and circumferential, is evenly distributed.
That described cavity inner spring initial diameter is larger is 1.2mm～1.5mm, and the difference of pitch and spring steel diameter is 0.1,Direction of rotation is right-handed helix; That diameter is less is 0.7～1mm, and the difference of pitch and spring steel diameter is 0.1, rotationDirection is left hand helix.
Circumferential 24 or 36 altogether of upper spring quantity in described cavity, large little spring is evenly spaced apart, axially onSpring base 5～10mm, large little spring is equally spaced
Adopt the present invention can obtain following beneficial effect:
1) the present invention, by changing the wall structure of main chamber burner inner liner, absorbs and has changed sound wave in main chamberPropagation, and then make the phase difference of oscillation of sound pressure and HRR fluctuation can not remain constant, simultaneously spring thisBody has the effect of compensator or trimmer pressure, thereby has effectively prevented the generation of thermal acoustic oscillation.
2) medi-spring of the present invention the heat convection area that has increased cold gas is set, improved the cooling effectiveness of cold gas,Have broad application prospects.
Brief description of the drawings
Fig. 1: the circumferential spring distribution schematic diagram of example of the present invention;
Fig. 2: example of the present invention is spring distribution schematic diagram vertically.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail:
As shown in Figure 1, 2, the vibrationproof cooling wall of a kind of ground combustion machine combustion chamber of the present embodiment comprises outer wall 1 and inwall2, inwall 2 is fixed on outer wall 1 by little spiral shell chip type spring 3 and large spiral shell chip type spring 4, between two walls, forms and is communicated withCavity 5. On inwall 2, be provided with multiple gas mould Cooling Holes 6, gas mould Cooling Holes 6 is communicated with cavity 5, as Fig. 2Shown in. Air film hole 6 is sparse near the position distribution of spiral plate type spring 3 and 4, away from spiral plate type springPosition distribution is comparatively intensive.
As shown in Figure 2, spiral spring steel 3 connects one end of inwall 2, and diameter is less, is 0.6～0.7mm; ConnectThe one end that connects outer wall 1, diameter is larger, is 0.9～1mm. Spiral spring steel 4 connects one end of inwall 2, diameterAlso less, be 1.2～1.3mm; The one end that connects outer wall 1, diameter is larger, is 1.5～1.6mm. By each spiral shellThe diameter of rotating spring increases progressively, and its cushioning effect to vibration is strengthened gradually, and the interval of different large little springsDistribute, increased the frequency range that can absorb vibration.
As illustrated in fig. 1 and 2, big or small spiral plate type spring is upwards uniformly distributed 36 altogether in week, and wherein size is each18, and spaced apart. Axially, be also that size interval distributes, distribute spacing is 5～10mm.
The structure that connects the numerous springs of inside and outside wall in cavity of the present invention has obvious enhanced heat exchange effect, numerous springsStructure can derive the heat of internal face to carry out large-area heat convection rapidly, makes cold gas be able to efficient utilization.As shown in Figure 2, on inwall 2, air film hole 6 can be given vent to anger and strengthen overflow heat exchange, spiral plate type spring 3 and 4 by dynamic pressureNear few perforate, can improve cooling effectiveness in the constant situation of tolerance.
Above-described embodiment is only a preferred embodiment of the present invention, should not become limiting the scope of the invention,The specific embodiment of the present invention is not limit above-described embodiment. According to foregoing of the present invention, common according to this areaTechnological know-how and customary means, do not departing under the above-mentioned basic fundamental thought of the present invention prerequisite, and the present invention can also makeAmendment, replacement or the change of other various ways, all should drop within the scope of rights protection of the present invention.
Claims (4)
1. a vibrationproof cooling wall for ground combustion machine combustion chamber, is characterized in that, described vibrationproof cooling wall comprise outer wall andInwall, inwall is fixed on outer wall by two kinds of spiral springs of One's name is legion, forms the cavity being communicated with between two walls.
2. the vibrationproof cooling wall of a kind of ground combustion machine according to claim 1 combustion chamber, is characterized in that, described inOn vibrationproof cooling wall inside, be provided with multiple gas mould Cooling Holes, gas mould Cooling Holes is communicated with cavity. Air film hole is at close spiral shellThe position distribution of rotary vane type spring is sparse, comparatively intensive in the position distribution away from spiral plate type spring.
3. the vibrationproof cooling wall of a kind of ground combustion machine according to claim 1 combustion chamber, is characterized in that, described inSpiral spring steel is a kind of one end that connects inwall wherein, and diameter is less, is 0.6～0.7mm; Connect one end of outer wall,Diameter is larger, is 0.9～1mm. Another spiral spring steel connects one end of inwall, and diameter is also less, for1.2～1.3mm; The one end that connects outer wall, diameter is larger, is 1.5～1.6mm.
4. according to the vibrationproof cooling wall of a kind of ground combustion machine combustion chamber described in claim 1,3, it is characterized in that,Described big or small spiral spring is upwards uniformly distributed 36 altogether in week, and wherein each 18 of size, and spaced apart.Axially, be also that size interval distributes, distribute spacing is 5～10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610048079.4A CN105605605A (en) | 2016-01-25 | 2016-01-25 | Anti-vibration cooling wall of ground gas turbine combustion chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610048079.4A CN105605605A (en) | 2016-01-25 | 2016-01-25 | Anti-vibration cooling wall of ground gas turbine combustion chamber |
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| Publication Number | Publication Date |
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| CN105605605A true CN105605605A (en) | 2016-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610048079.4A Pending CN105605605A (en) | 2016-01-25 | 2016-01-25 | Anti-vibration cooling wall of ground gas turbine combustion chamber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112833424A (en) * | 2021-01-08 | 2021-05-25 | 西北工业大学 | Novel volute type combustion chamber flame tube wall surface structure |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB701099A (en) * | 1950-05-22 | 1953-12-16 | Lucas Ltd Joseph | Improvements to combustion chambers |
| JPS58102031A (en) * | 1981-12-11 | 1983-06-17 | Hitachi Ltd | Supporting structure of gas turbine combustor |
| JPH0953825A (en) * | 1995-08-16 | 1997-02-25 | Nissan Motor Co Ltd | Combustor of gas turbine |
| CN1450304A (en) * | 2002-04-10 | 2003-10-22 | 通用电气公司 | Annular one-piece corrugated liner for combustor of gas turbine engine |
| CN1509392A (en) * | 2001-04-27 | 2004-06-30 | Combustion chamber in particulary of gas turbine | |
| CN1590734A (en) * | 2003-08-29 | 2005-03-09 | 三菱重工业株式会社 | Gas turbine combustor |
| CN101460783A (en) * | 2006-05-31 | 2009-06-17 | 西门子公司 | Combustion chamber wall |
| CN104896514A (en) * | 2015-05-13 | 2015-09-09 | 广东电网有限责任公司电力科学研究院 | Anti-vibration heat insulation wall of main combustion chamber of gas turbine |
| CN204776926U (en) * | 2015-07-15 | 2015-11-18 | 洪帅金 | 4 - methyl - 3 - bromopyridine saves jar |
-
2016
- 2016-01-25 CN CN201610048079.4A patent/CN105605605A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB701099A (en) * | 1950-05-22 | 1953-12-16 | Lucas Ltd Joseph | Improvements to combustion chambers |
| JPS58102031A (en) * | 1981-12-11 | 1983-06-17 | Hitachi Ltd | Supporting structure of gas turbine combustor |
| JPH0953825A (en) * | 1995-08-16 | 1997-02-25 | Nissan Motor Co Ltd | Combustor of gas turbine |
| CN1509392A (en) * | 2001-04-27 | 2004-06-30 | Combustion chamber in particulary of gas turbine | |
| CN1450304A (en) * | 2002-04-10 | 2003-10-22 | 通用电气公司 | Annular one-piece corrugated liner for combustor of gas turbine engine |
| CN1590734A (en) * | 2003-08-29 | 2005-03-09 | 三菱重工业株式会社 | Gas turbine combustor |
| CN101460783A (en) * | 2006-05-31 | 2009-06-17 | 西门子公司 | Combustion chamber wall |
| CN104896514A (en) * | 2015-05-13 | 2015-09-09 | 广东电网有限责任公司电力科学研究院 | Anti-vibration heat insulation wall of main combustion chamber of gas turbine |
| CN204776926U (en) * | 2015-07-15 | 2015-11-18 | 洪帅金 | 4 - methyl - 3 - bromopyridine saves jar |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112833424A (en) * | 2021-01-08 | 2021-05-25 | 西北工业大学 | Novel volute type combustion chamber flame tube wall surface structure |
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