JPH05507333A - Tubing, especially flame tubes, with an inner area for hot gas induction - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] A tube material, in particular a flame tube, with an inner area for the induction of hot gases. an inner region for guiding the flow, and a large number of and a heat shield made of stone.

This type of tube material is used in a variety of ways, especially as a flame tube in the combustion equipment of gas turbine equipment. has been done. Federal Republic of Germany Patent No. 81173734 and No. 02523 Publication No. 449 describes a pipe material equipped with this type of heat shield, but this heat shield Each arch is made up of a number of stones arranged in parallel, each consisting of two stones. are clamped by supports on opposite sides of the Tightening is perpendicular to the direction The direction of fixing the masonry is not explicitly stated, but the pipe may be vertical or less If both are located diagonally, a suitable support frame is required to support the stones. Be horizontal! For tubing that is The corresponding support frame that must be mounted is generally made of metal. Support frame is heat shield The support frame must be sufficiently cooled to withstand operational heat loads to the same extent as There must be.

The support frame is provided with holes or similarly shaped channels for cooling the support frame. , through which cooling gas (in the case of flame tubes, part of the combustion air that is generally sent to the flame tube) part) is washed away. Proposals of this kind have been proposed, for example, in German Patent No. C252344. It is described in Publication No. 9. The problem often arises here is that the cooling air is It flows into the inner region in the form of separate streams. This creates a vortex in the hot gas flow. This results in hot gases being directed towards the inner area of the support frame surface. There is a risk of swirling on the surface and damaging this surface. In some cases, high-temperature flow itself is impeded by the cooling gas flowing across it. For this, By setting the channel at a lower angle than perpendicular to the surface of the support frame, you can Measures will be taken. However, this solution is extremely expensive to manufacture and At the very least, it is sufficient to choose an angle that cannot be realized without considerable expense. No sufficient effect can be obtained.

It is therefore an object of the present invention to provide ripe seeds which can be cooled efficiently and as economically as possible. heat shield reinforced tubing with at least one support frame for the Therefore, the obstruction of hot gas flow in the tubing and the associated high temperatures impinging on the support frame. The object of the present invention is to provide a pipe material that can avoid dangers caused by small gas flows.

According to the invention, the tubing has an inner region for directing the hot gas in the vertical flow direction. This heat seal is reinforced with a heat shield consisting of multiple stones arranged in parallel The card is oriented toward the inner area and supported by at least one support frame, the support frame being made of metal. tube material while forming numerous channels and slits for supplying cooling gas It has a main part surrounding the main part, and in this main part, the channel Almost covered.

The tube material according to the present invention has a support frame with a slit around it, and a chamfer in the slit. The cooling gas entering through the channel is collected, where it forms a uniform slow flow, and this The flow eventually enters the inner region guiding the hot gas, this slow flow is supported. A sufficient cooling gas jaw can be created above the support frame, and this cooling gas film is reliably supported. The frame is shielded, but in this case the hot gas flow is unobstructed and does not cause vortices. The cooling fluid guided through the channels impinges on the important parts before entering the inner region. They are decelerated by this process and merge while forming a uniform cooling fluid film. Also support frame Effective impingement cooling of the heat-resistant parts of the material is achieved.

In order to achieve particularly good collective guidance of the cooling gas flow exiting the channels, supports The frame is equipped with a collecting chamber or an array of collecting chambers surrounding the tubing; A channel opens in and from this collecting chamber the cooling gas passes through the slit into the inner area. be guided. The cooling gas flow is decelerated in the collection chamber, so that it is can form uniform pus.

Providing the slits approximately parallel to the flow direction is a special feature regardless of their formation by other methods. It is advantageous for the direction of flow to be approximately parallel or opposite to the direction of flow. A cooling gas flow is generated that has as small a velocity variable component as possible in the vertical direction. Further support The most heat-resistant part of the frame, that is, the part directly facing the inner area, is efficiently cooled down. channel by forming the most thermally strong part as a thin main part. Efficient impingement cooling is achieved with a flow of cooling gas from the chamber.

In another implementation LQ of the invention, the slit is advantageously located close to the inlet of the support frame. A slit is provided in the support frame so as to open in the inner (jl%!i area. This will cover almost the entire support frame and will allow the cooling to be shielded from hot gases. A cooling gas film can be formed.

In a particularly advantageous embodiment of the invention, the tubing is substantially upright with respect to an axis parallel to the flow direction. There is. Further developing this, the tube material is axially symmetrical with respect to the axis, especially cylindrical. This results in a particularly simple and inexpensive embodiment of the invention.

A preferred use is for the tube according to the invention to be a flame tube for a gas turbine 'JR.

This tubing material is extremely thermally strong and additionally requires very little cooling, which makes it possible to A large degree of freedom can be obtained in terms of configuration when installing it in the bin.

A detailed explanation of the present invention will be given based on the embodiment shown in FIG.

FIG. 4 shows a tube with a heat shield and a support frame according to the invention; FIGS. 2 and 3 show a tube according to the invention; FIG. Implementation of the support frame according to Mr. Wl, Figure 4 shows a tube with a heat shield and a support frame according to the invention. 11 shows a particularly advantageous embodiment of the material.

Figure 1 shows a standpipe with a region 2 in which the hot gas is to be guided in the direction of flow 3 indicated by the arrow. 1, this pipe material is a mature shield 4 consisting of stones 5 arranged in parallel and one above the other. The six lining stones are fixed inside the pipe 1 with suitable fixing materials. fixed The types of materials and their handling methods are clear from the prior art and are not shown in the drawings. The tube material 1 is provided with a support frame 6 at its lower end, and a stone material 5 is supported on the support frame 6.

This support frame 6 is attached directly to the tube 1 in this embodiment. This support Of course, the holding frame can be made separately if necessary, and later joined to the pipe material 1 by any method deemed appropriate. You can also

The support frame 6, like the rest of the tube, is made of metal and is therefore more heat-resistant than the heat shield 4. Correspondingly, the support frame 6 has a special cooling section outside the support frame 6. A channel 7 is provided around the periphery, through which a cooling fluid, in particular cooling air, is conveyed to the tubing 1. can be guided to the inner region 2 of. However, according to the invention, the channel 7 is directly connected to the inner region. Instead of opening in the slit 2, the slit 8 surrounding the tube 1 in the support frame 6 is opened. This slit opens in the same manner as the inner region 2 of the tube l and surrounds the tube #1. It is formed by a tube portion 9. The cooling air flow coming out of channel 7 The cooling air film joins to form a uniform cooling air film at low speed, and this cooling air film is , comes out from the support frame 6 and functions as a reliable heat shield while protecting the top of the support frame 6. Inside pipe material 1 The island panel 7 toward the side region 2 is substantially covered by the main part 9 of the support frame 6.

The cooling air flow guided through the island channel 7 collides with this main part 9 and cools inside the support frame 6. Additional impingement cooling is provided for areas in direct contact with the hot gas in the side areas 2.

Another embodiment of the support frame 6 according to the invention is shown in FIGS. 2 and 3. PJ abbreviation Therefore, both figures will be referred to here at the same time. Here too, it can be cooled to support stone 5. A support frame 6 is provided which allows the cooling air to pass through the channels 7 and pick up the tubing 1. To the surrounding slit 8, from there inside y! It is cooled by being guided to the territorial area. It will be done. The generation of vortices in the hot gas flow guided through the inner region 2 is avoided as much as possible. In order to achieve this, the slits 8 are opened not perpendicularly but parallel to the flow direction 3.

Therefore, a -1 deceleration of the cooling air film is achieved, and the structure to be cooled, especially the main part 9, is In the embodiment of FIG. 2, where cooling is accelerated, the hot gas flow is directed first to the support frame 6 and then to the masonry. 5. Correspondingly, the slit 8 has a cooling The supports are arranged in such a way that the air film can be inserted as completely as possible between the support frame 6 and the hot gas stream. It opens toward the inner region 2 near the inlet 11 of the holding frame 6.

Another embodiment according to the invention is shown in FIG. Here the supporting frame 6 is a separate structure. It is shown as an element, which is flanged to other parts of the tubing 1. support frame 6, the cooling air is guided to the inner region 2 through channels 7 and slits 8. However, it is also advantageous if the slit 8 is located close to the inlet 11 of the support frame 6. (By this, the flow direction should be extended to cover the entire support frame 6 as much as possible.) A cooling air film flowing in direction 3 is obtained. In particular, the support frame 6 has a channel 7 and a slit 8. A gathering chamber 10 surrounding the pipe material 1 is provided between the tubes 1, and cooling air is supplied to this gathering chamber through the slits 8. It enters through channel 7 before exiting through to inner region 2 . Gathering room 10 is a slit 8 serves to further homogenize the cooling fluid exiting. The gathering room is formed as a composite part. It can be done. The slit 8 is formed between the inflow part 11 and the main part 9. In this main part, Effective impingement cooling is provided by the cooling fluid entering channel 7. Main part 9 is a figure In the case shown, the support frame is of course not made integral with the support frame, but as a separate component. 6 can be combined. Although this creates a certain additional disadvantage in terms of manufacturing technology, , it is possible to select various materials for the support frame 6. Channel 7 of support frame 6 The part containing the part should be made of an economical material that can be processed into a spacer, such as ferritic steel. In contrast, the main part 9 is made of a particularly strong material, such as a high heat-resistant nickel alloy. Available for use. In this way, any economic inconvenience that may seem daunting at the moment can be alleviated. In some cases, this can be resolved.

The shielded pipe material according to the present invention has particularly good heat resistance, and can withstand high temperature gases. Allowing more unobstructed guidance of flow. This is the case, for example, in a gas turbine combustion chamber. It is sometimes effective for use in combustion equipment such as

international search report 1mereN16MI　Aejlle*116n　N. PCT/DE90100 542 International Search Report PCT/DE 90100542 SA　38553

Claims (7)

[Claims] 1. an inner region (2) for guiding the hot gas in the flow direction (3) and a a heat shield consisting of a large number of stones (5), which supported by at least one metal support frame (6) toward the Remove the tubing (1) while forming a number of channels (7) and slits (8) to and a surrounding lip (9) in which the channel (7) connects to the inner region (2). The tubing (1) is substantially covered towards. 2. 2. The slit (8) according to claim 1, wherein the slit (8) extends substantially parallel to the flow direction (3). Pipe material (1). 3. The support frame (6) includes a gathering chamber (10) surrounding the pipe (1), and this gathering chamber A tube according to claim 1 or 2, characterized in that the channel (7) is connected to the slit (8). 1). 4. The support frame (6) has an inlet (11) for hot gas, and the slit (8) 4. The tube according to claim 1, wherein the entrance (11) opens into the inner region (2). Pipe material (1). 5. Claim 1 is substantially upright with respect to an axis (12) parallel to the flow direction (3). The tube material (1) according to one of item 4. 6. 6. The tube (1) according to claim 5, which is axially symmetrical about the axis (12), in particular cylindrical. 7. A gas turbine device comprising a tube (1) according to one of claims 1 to 6. flame tube for.