DE1211441B - Combustion chamber, especially for gas turbine systems - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. α .:

F02c

German KL: 46 f- 7/03

Number: 1211441

File number: A 418101 a / 46 f

Filing date: December 4, 1962

Opening day: February 24, 1966

The invention relates to a known combustion chamber with one of an outer wall Space for the flow of a coolant enclosed inner wall, which is axially in the combustion chamber successive inner wall rings is divided and in which each inner wall ring from in the circumferential direction successive plates is formed, the outer wall in particular divided into rings which follow one another axially in the combustion chamber and each surround an inner wall ring. The inside surface the inner wall is in contact with the flame and the hot gases. The outside surface the inner wall is through the coolant flow located in the intermediate space, in particular Gas flow, ζ. B. air flow, cooled. The space in between, an annulus, becomes the coolant space below called. The combustion chamber is a metallic combustion chamber. The combustion chamber is particular a combustion chamber for a gas turbine. In the known combustion chamber, each plate is curved and fixed with respect to this wall via hooks that engage in slots in the outer wall. These Construction is complex and not very stable and also brings flow losses because of the hook lie in the coolant flow.

According to the invention, less effort should be made, the flow losses being lower and intensive cooling and good thermal expansion possibilities should be available.

It is therefore proposed according to the invention that each plate from the outer wall over two in Radial ribs that follow one another in the circumferential direction and are welded to the plate and the outer wall is worn. This results in a low-resistance flow guidance and a less complex construction. You only need simple sheet metal rings for the outer wall, simple sheet metal pieces for the plates and radial ribs and a welding machine. The production is much faster, and this one Construction is extremely stable. There are also good thermal expansion possibilities of the parts mentioned. The flow resistances are as low as possible. The cooling is intense. Other known types with inner wall and outer wall and curved plates or the like are also more complex and require far more production time and are more expensive. Among other things, it concerns the production of many one-piece cast parts, which then have to be machined precisely. Also are there the flow resistances are also greater.

Preferably, a combustion chamber following an inner wall ring towards the axial combustion chamber outlet, in particular for
Gas turbine plants

Applicant:

Associated Electrical Industries Limited, London

Representative:

Dr.-Ing. A. Schmidt, patent attorney,
Berlin 33, Hohenzollerndamm 150

Named as inventor:
Thomas Lowthian Gardner,
Sale, Cheshire (UK)

Claimed priority:

Great Britain 5 December 1961 (43 512)

Inner wall ring has a larger diameter than said previous inner wall ring. In particular form the two close-lying axial ends of these two inner wall rings an annular gap that can be flown through. However, all the inner wall rings can also have the same diameter to have. In particular, the inner wall panels follow in the circumferential direction at a mutual distance on each other. Each inner wall panel is circumferential in order to be cheaper and easier to manufacture seen, preferably flat. Preferably those are made up of those connected by the radial ribs Outer and inner wall rings formed overall rings arranged within a support housing, wherein this is preferably arranged within the combustion chamber housing. In particular, they are out the overall rings formed by the radial ribs connected to the outer and inner wall rings in Divided sectors. For the just mentioned designs of the combustion chamber, protection is only available in connection coveted with the subject matter of the main claim.

The cross-sections of the plates that are visible in an axial section extend in particular parallel to Combustion chamber axis. The plates are at the same time a means of enlarging the heat exchange surfaces. The radial ribs determine the direction of the coolant flow in the coolant space. They stretch in particular axially to the combustion chamber.

609 509/87

In the drawing, FIG. 1 shows an embodiment of the combustion chamber according to the invention in FIG an axial section in their, viewed axially, shown central area. This combustion chamber has called Overall rings on. Each overall ring is divided into segments.

F i g. 2 of the drawing shows an embodiment of such a segment in perspective View.

In the combustion chamber according to FIG. 1 is, not shown, at the top of the drawing, the inlet of gas and air via nozzles. The hot combustion gases flow downwards. In each case, an inner wall ring 3 is surrounded by an outer wall ring 6 and is firmly connected to it by radial ribs 5. This results in an overall ring. The two axial ends of two inner wall rings 3 lying close to one another form an annular gap through which a flow can flow. Each inner wall ring 3 is divided into inner wall plates 4 which follow one another in the circumferential direction and which follow one another in the circumferential direction at a mutual spacing 8. The overall rings are arranged within a support housing 2. The support housing! in turn is arranged within the combustion chamber housing 1. The fixing of the support housing 2 with respect to the combustion chamber housing 1 is done by radial bolts, pins or journals 7 through which eyes 7 α penetrate. These radial bolts, pins or journals 7 and these eyes 7 a are provided with circumferential spacings from one another on the circumference of the combustion chamber. Instead of the radial bolts, pins or journals 7, other suitable fixing means can also be used.

In the overall ring segment according to FIG. 2, which extends over a quarter of the circumference, it can be seen that the inner ring plates 4 are flat. But they can also be curved, that is, run parallel to the outer wall 6. The overall ring segment consists of five inner ring plates 4, ten metallic radial ribs 5 and an outer wall segment 6 α. Each inner wall plate 4 is firmly connected to the outer wall segment 6 α by two radial ribs 5. It is all about welded joints. To attach the entire ring segment to the support housing 2 z. B. od by bolts. Like. Bores 9 are provided in the outer wall segment 6 α . The inner ring plates 4 all extend parallel to the combustion chamber axis and are tangent to an imaginary, inscribed cylinder that has the combustion chamber axis to the axis. The planar design of the inner ring plates 4 does not interfere with the function of the combustion chamber. The inner wall plates 4 and the parts connected to them are expediently made of high temperature resistant material, for example nickel-chromium steels or similar high temperature resistant steels or alloys.

Claims (8)

Patent claims: 1. Combustion chamber, in particular for gas turbine systems, with an inner wall enclosed by an outer wall with a space for the flow of a coolant, which is divided into inner wall rings that are consecutive to the combustion chamber and in which each inner wall ring is formed from plates following one another in the circumferential direction, the outer wall is divided in particular into rings which follow one another axially in the combustion chamber and each surround an inner wall ring, characterized in that each plate (4) is attached to the plate (4) from the outer wall (the outer wall segments 6d) via two circumferential successive ones. and the outer wall (outer wall segments 6 α) welded radial ribs (S) is supported. 2. Combustion chamber according to claim 1, characterized in that a ring on an inner wall (3) a larger inner wall ring (3) following the axial combustion chamber outlet Has a diameter than the aforesaid inner wall ring (3). 3. Combustion chamber according to claim 2, characterized in that the two are close together Axial ends of these two inner wall rings (3) form an annular gap through which a flow can flow. 4. Combustion chamber according to claim 1, characterized in that the inner wall plates (4) in Successive circumferential direction with mutual spacing (8). 5. Combustion chamber according to claim 1, characterized in that each inner wall plate (4), in Seen in the circumferential direction, is flat. 6. Combustion chamber according to claim 1, characterized in that the from the through the radial ribs (5) connected outer and inner wall rings (6 and 3, respectively) formed overall rings (3, 5, 6) arranged within a support housing (2) are. 7. Combustion chamber according to claim 6, characterized in that the support housing (2) within of the combustion chamber housing (1) is arranged. 8. Combustion chamber according to claim 1, characterized in that the from the through the radial ribs (5) connected outer and inner wall rings (6 and 3, respectively) formed overall rings (3, 5, 6) are divided into sectors. Considered publications:
British Patent Nos. 790 292, 700 004;
U.S. Patent No. 2617255. For this purpose, 1 sheet of drawings 609 509/87 2.66 © Bundesdruckerei Berlin