CN204404245U - A kind of supporting construction strengthening gas-turbine combustion chamber cover cap stability - Google Patents
A kind of supporting construction strengthening gas-turbine combustion chamber cover cap stability Download PDFInfo
- Publication number
- CN204404245U CN204404245U CN201420851654.0U CN201420851654U CN204404245U CN 204404245 U CN204404245 U CN 204404245U CN 201420851654 U CN201420851654 U CN 201420851654U CN 204404245 U CN204404245 U CN 204404245U
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- China
- Prior art keywords
- ring
- fixed
- glass holder
- supporting construction
- cover cap
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- Withdrawn - After Issue
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Abstract
Strengthen a supporting construction for gas-turbine combustion chamber cover cap stability, belong to gas turbine technology field.This supporting construction comprises outer shroud, inner ring and multiple support ring; Outer shroud is fixed on the internal face of urceolus, and inner ring is fixed on the glass holder outer wall of center; Multiple support ring is separately positioned on the outside of each peripheral glass holder, and each support ring is divided into stationary half and movable semi-ring; Each stationary half one end is fixed in inner ring, and the other end is fixed on outer shroud; Each movable semi-ring one end is fixed in inner ring, and the other end is fixed on urceolus and outer shroud by locking component.Supporting construction effectively can strengthen the rigidity of peripheral glass holder and center glass holder, strengthens cover cap stability, improves the intrinsic frequency of cover cap, thus avoids the frequency that thermal acoustic oscillation may occur, prevents resonance and causes parts damages.
Description
Technical field
The utility model relates to gas turbine technology field, particularly relates to a kind of supporting construction strengthening gas-turbine combustion chamber cover cap stability.
Background technology
Traditional gas-turbine combustion chamber adopts diffusion combustion technology, and due to the localized hyperthermia in combustion chamber, cause its pollutant emission, especially discharged nitrous oxides is higher.In view of more and more stricter to the requirement of discharge of gas turbine amount, the method meeting this generic request is the combustion chamber making traditional diffusion flame combustors be developed as fully premixed burning, to reduce the discharge of NOx and CO.There are dry low NOx (DLN) combustion system, dry low emissions (DLE) combustion system, poor fuel premix (LPM) combustion system in these combustion chambers well known in the prior art.These combustion chambers generally include the multiple fuel nozzles be arranged in cylinder, and described cylinder is also referred to as cover cap.
Because these combustion chambers are run under this type of poor fuel/air ratio, the less change therefore in speed can cause mass flow to occur larger change, thus causes fuel/air mixture than fluctuation.These fluctuations can cause heat liberation rate, heat release rate that larger change occurs, and cause producing high pressure fluctuations in end cap.The fluctuation of fuel/air mixture ratio, swirl flame interact and instability heat release between interaction may cause pressure fluctuation, the phenomenon of this pressure fluctuation is called as thermal acoustic oscillation.If the intrinsic frequency of combustion chamber components overlaps in a certain degree with the frequency of thermal acoustic oscillation, hardware longevity can be made to shorten.That is, the resonance caused because of thermal acoustic oscillation can cause damage to combustion chamber components, and these parts need periodic maintenance.And keep in repair combustion chamber components and need gas turbine is shut down.Therefore, except except the relevant cost of maintenance combustion chamber components, also exist because gas turbine overhauls the loss of time of causing and the extra cost caused.
Utility model content
The purpose of this utility model is to provide a kind of supporting construction strengthening gas-turbine combustion chamber cover cap stability, this technical scheme can by the peripheral glass holder in reinforcing cover cap and center glass holder, improve the rigidity of cover cap, effectively avoid thermal acoustic oscillation frequency, the life-span of elongation hood cap.
The technical solution of the utility model is as follows:
Strengthen a supporting construction for gas-turbine combustion chamber cover cap stability, described cover cap comprises multiple peripheral glass holder, center glass holder, end cap and urceolus, and one end of each described peripheral glass holder is fixed on end cap; It is characterized in that, this supporting construction comprises outer shroud, inner ring and multiple support ring; Outer shroud is fixed on the internal face of urceolus, and inner ring is fixed on the glass holder outer wall of center; Described multiple support ring is separately positioned on the outside of each peripheral glass holder, and each support ring is divided into stationary half and movable semi-ring two parts, and each described stationary half one end is fixed in inner ring, and the other end is fixed on outer shroud; Each described movable semi-ring one end is fixed in inner ring, and the other end is fixed on urceolus and outer shroud by locking component; Stationary half and movable semi-ring clamp peripheral glass holder when being in tensioning state jointly.
In technique scheme, the thickness of described stationary half and movable semi-ring is limited in the scope between 0.5mm ~ 2mm.The axial length of described stationary half and movable semi-ring is limited in the scope between 5mm ~ 40mm.
The utility model has the following advantages and the technique effect of high-lighting: 1. supporting construction effectively can improve the intrinsic frequency of peripheral glass holder and center glass holder, strengthens cover cap stability; 2. effectively can be improved the intrinsic frequency of cover cap by supporting construction, thus avoid the frequency that thermal acoustic oscillation may occur; 3. supporting construction does not affect the installation of peripheral glass holder.
Accompanying drawing explanation
The structural representation of the supporting construction embodiment of the enhancing gas-turbine combustion chamber cover cap stability that Fig. 1 provides for the utility model.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the B enlarged drawing of Fig. 2.
Fig. 4 is the B enlarged drawing of movable semi-ring Fig. 2 in a relaxed state.
In figure, the peripheral glass holder of 1-; 2-center glass holder; 3-end cap; 4-urceolus; 5-outer shroud; 6-inner ring; 7-stationary half; The movable semi-ring of 8-; 9-locking component; 11-shell; 12-flange; 13-burner inner liner locating piece; 14-support member; 15-floating ring; 16-center bearing bracket.
Detailed description of the invention
Below in conjunction with drawings and Examples, structure of the present utility model, principle and concrete enforcement are described in further detail.
As shown in Figure 1, gas-turbine combustion chamber cover cap comprises multiple parts such as multiple peripheral glass holder 1, center glass holder 2, end cap 3, urceolus 4, shell 11, flange 12, burner inner liner locating piece 13, support member 14, floating ring 15 and center bearing bracket 16, cover cap is installed to head of combustion chamber by flange 12, flange 12 and shell 11 are fixedly linked, flange 12 is furnished with multiple burner inner liner locating piece 13, the effect of burner inner liner locating piece 13 stops burner inner liner upstream direction to move, arrange multiple support member 14 inside shell 11, the other end of support member 14 is connected with urceolus 4; The upstream extremity of urceolus 4 arranges end cap 3, and the side of end cap 3 is furnished with multiple floating ring 16, and nozzle and floating ring 16 fit inside, play sealing function, and the opposite side of end cap 3 is furnished with multiple peripheral glass holder 1 and a center glass holder 2; The supporting role that center glass holder 2 has center bearing bracket 16 certain at downstream direction, one end of each described peripheral glass holder 1 is fixed on end cap 3.
Described supporting construction comprises outer shroud 5, inner ring 6 and multiple support ring; Outer shroud 5 is fixed on the internal face of urceolus 4, and inner ring 6 is fixed on center glass holder 2 outer wall; Described multiple support ring is separately positioned on the outside of each peripheral glass holder 1, and each support ring is divided into stationary half 7 and movable semi-ring 8 two parts, and each described stationary half 7 one end is fixed in inner ring 6, and the other end is fixed on outer shroud 5; Each described movable semi-ring 8 one end is also fixed in inner ring 6, and the other end is fixed on urceolus 4 and outer shroud 5 by locking component 9; Stationary half 7 and movable semi-ring 8 clamp peripheral glass holder 1 when being in tensioning state jointly; Thus making peripheral glass holder restrained, rigidity increases to some extent.The thickness of stationary half and movable semi-ring is generally limited in the scope between 0.5mm ~ 2mm; The axial length of stationary half and movable semi-ring is generally limited in the scope between 5mm ~ 40mm.
As shown in Figures 2 and 3, stationary half 7 is identical with the number of peripheral glass holder 1 with the number of movable semi-ring 8, thus guarantees that each peripheral glass holder is restrained.Be fixed on urceolus 4 after described locking component 9 is in place, prevent from occurring coming off in the combustion engine course of work.After peripheral glass holder installation in position, the through hole that each movable semi-ring is offered from outer shroud and urceolus passes, and tension activity semi-ring end makes to be close to peripheral glass holder and produces certain effect power.Fix the position of movable semi-ring with locking component 9, keep the state that peripheral glass holder is fixed.Movable semi-ring and stationary half acting in conjunction, enhance the rigidity of peripheral glass holder, thus strengthen the stability of cover cap, improves intrinsic frequency, effectively avoid the frequency that thermal acoustic oscillation may occur, prevents the damage that resonance causes parts.
As shown in Figure 4, there is certain interval in movable semi-ring 8 in a relaxed state and between peripheral glass holder, is in tensioning state, jointly clamps peripheral glass holder 1 with stationary half 7, thus ensure that supporting construction does not affect the installation of peripheral glass holder after fixing by locking component 9.
Claims (3)
1. one kind strengthens the supporting construction of gas-turbine combustion chamber cover cap stability, described cover cap comprises multiple peripheral glass holder (1), center glass holder (2), end cap (3) and urceolus (4), and one end of each described peripheral glass holder (1) is fixed on end cap (3); It is characterized in that, this supporting construction comprises outer shroud (5), inner ring (6) and multiple support ring; Outer shroud (5) is fixed on the internal face of urceolus (4), and inner ring (6) is fixed on center glass holder (2) outer wall; Described multiple support ring is separately positioned on the outside of each peripheral glass holder (1), and each support ring is divided into stationary half (7) and movable semi-ring (8) two parts, each described stationary half (7) one end is fixed in inner ring (6), and the other end is fixed on outer shroud (5); Each described movable semi-ring (8) one end is fixed in inner ring (6), and the other end is fixed on urceolus (4) and outer shroud (5) by locking component (9); Stationary half (7) and movable semi-ring (8) clamp peripheral glass holder (1) when being in tensioning state jointly.
2. a kind of supporting construction strengthening gas-turbine combustion chamber cover cap stability as claimed in claim 1, it is characterized in that, the thickness of described stationary half (7) and movable semi-ring (8) is limited in the scope between 0.5mm ~ 2mm.
3. a kind of supporting construction strengthening gas-turbine combustion chamber cover cap stability as claimed in claim 1 or 2, it is characterized in that, the axial length of described stationary half (7) and movable semi-ring (8) is limited in the scope between 5mm ~ 40mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420851654.0U CN204404245U (en) | 2014-12-26 | 2014-12-26 | A kind of supporting construction strengthening gas-turbine combustion chamber cover cap stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420851654.0U CN204404245U (en) | 2014-12-26 | 2014-12-26 | A kind of supporting construction strengthening gas-turbine combustion chamber cover cap stability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204404245U true CN204404245U (en) | 2015-06-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420851654.0U Withdrawn - After Issue CN204404245U (en) | 2014-12-26 | 2014-12-26 | A kind of supporting construction strengthening gas-turbine combustion chamber cover cap stability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204404245U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104566478A (en) * | 2014-12-26 | 2015-04-29 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Support structure for enhancing stability of combustion chamber cover cap of gas turbine |
-
2014
- 2014-12-26 CN CN201420851654.0U patent/CN204404245U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104566478A (en) * | 2014-12-26 | 2015-04-29 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Support structure for enhancing stability of combustion chamber cover cap of gas turbine |
| CN104566478B (en) * | 2014-12-26 | 2017-09-15 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | It is a kind of to strengthen the supporting construction of gas-turbine combustion chamber cap stability |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150617 Effective date of abandoning: 20170915 |