A flame tube cross-flame tube cooling device

Abstract

The present application belongs to the technical field of engine testing, and specifically relates to a flame tube cross-fire tube cooling device. The device comprises a plurality of horizontal fins (1) and a plurality of vertical fins (2). The plurality of horizontal fins (1) are arranged in parallel to form a semi-enclosed structure, which is used to be mounted on the outer wall of a cross-fire tube (3). Each vertical fin (2) is arranged outside the middle position of the semi-enclosed structure of the horizontal fin (1), and the roots of the two outermost vertical fins (2) extend along the inner annular surface of the semi-enclosed structure to form a large contact area (21); when the flame tube cross-fire tube cooling device is installed on the cross-fire tube (3), the plate surface of each horizontal fin (1) is parallel to the outlet end surface (31) of the cross-fire tube (3), and the plate surface of the two outermost vertical fins (2) is perpendicular to the elliptical minor axis (32) of the cross-fire tube (3). The present application prolongs the service life of the cross-fire tube and ensures the stable ignition and cross-fire of the combustion chamber.

Description

Technical Field

[0001] The present application belongs to the technical field of engine testing, and in particular relates to a flame tube and cross-flame tube cooling device. Background Art

[0002] The cross-fire tube is an important part of the flame tube of the annular tube combustion chamber. Its function is to transfer the high-temperature gas and flame formed by the combustion of the fuel in the flame tube where the ignition nozzle is located to other single-tube flame tubes without ignition nozzles when the combustion chamber is started and ignited, so as to achieve successful ignition of multiple flame tubes in the entire combustion chamber. During operation, high-temperature gas and even flames will flow through the cross-fire tube.

[0003] In the prior art, when conducting engine tests, the cross-fire tube has no cooling function. When high-temperature gas or flame flows through the cross-fire tube, its root is subjected to huge heat load and generates huge thermal stress. After working for a period of time, cracks and ablation will appear at the root of the cross-fire tube, affecting the start-up cross-fire of the combustion chamber. The cross-fire tube needs to be replaced after ablation and damage, which will cause the test to be suspended, the test cycle to be extended, and the cost to be increased. Summary of the invention

[0004] In order to solve the above problems, the present application provides a flame tube cross-fire tube cooling device, which mainly includes a plurality of horizontal fins and a plurality of vertical fins. The plurality of horizontal fins are arranged in parallel to form a semi-enclosed structure for being clamped on the outer wall of the cross-fire tube. Each vertical fin is arranged outside the middle position of the semi-enclosed structure of the horizontal fins, and the plurality of horizontal fins are connected as a whole. The roots of the two outermost vertical fins extend along the inner annular surface of the semi-enclosed structure to form a large contact area.

[0005] When the flame tube cross-fire tube cooling device is installed on the cross-fire tube, the plate surface of each horizontal fin is parallel to the outlet end surface of the cross-fire tube, and the plate surfaces of the two outermost vertical fins are perpendicular to the elliptical minor axis of the cross-fire tube.

[0006] Preferably, the number of the horizontal fins is 3-5, and the number of the vertical fins is 5-8.

[0007] Preferably, the semi-enclosed structure formed by the horizontal fins is an elliptical structure with 2 / 3 of the ring length.

[0008] Preferably, the horizontal fins have a fin thickness of 1.3-1.7 mm, a width of 2.8-3.2 mm, and a spacing between adjacent fins of 1.8-2.2 mm.

[0009] Preferably, the lower end surface of each of the vertical fins is an arc surface so as to fit on the root chamfer profile of the cross-fire tube.

[0010] Preferably, the area of ​​each vertical fin that fits the outer wall of the cross-fire tube is an arc-shaped area and merges with the inner surface of the horizontal fin.

[0011] Preferably, the horizontal fins and the vertical fins are integrally formed.

[0012] The cooling structure of the present application can significantly reduce the root temperature of the cross-flame tube, extend the service life of the cross-flame tube, and ensure stable ignition and cross-flame of the combustion chamber. The cooling structure of the present application does not require additional drilling or welding for installation, and utilizes the elliptical surface of the cross-flame tube and the existing cross-flame tube sleeve to achieve installation and positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of a preferred embodiment of the flame tube and cross-flame tube cooling device of the present application.

[0014] Figure 2 This is a schematic diagram of the installation of the flame tube and flame tube cooling device for this application.

[0015] Among them, 1-horizontal fin, 2-vertical fin, 21-large contact area, 22-arc surface, 23-arc area, 3-cross-flame tube, 31-exit end surface, 32-elliptical short axis, 33-cross-flame tube root guide round end. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the implementation of this application will be described in more detail in combination with the drawings in the implementation of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described implementation is a part of the implementation of this application, not all of the implementations. The implementation described below with reference to the drawings is exemplary and is intended to be used to explain this application, and cannot be understood as a limitation on this application. Based on the implementation in this application, all other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The implementation of this application is described in detail below in combination with the drawings.

[0017] The present application provides a flame tube cross-fire tube cooling device, such as Figure 1-Figure 2 As shown, it mainly includes a plurality of horizontal fins 1 and a plurality of vertical fins 2. The plurality of horizontal fins 1 are arranged in parallel to form a semi-enclosed structure, which is used to be clamped on the outer wall of the cross-fire tube 3. Each vertical fin 2 is arranged outside the middle position of the semi-enclosed structure of the horizontal fin 1, and the plurality of horizontal fins 1 are connected as a whole. The roots of the two outermost vertical fins 2 extend along the inner annular surface of the semi-enclosed structure to form a large contact area 21.

[0018] When the flame tube cross-fire tube cooling device is installed on the cross-fire tube 3 , the plate surface of each horizontal fin 1 is parallel to the outlet end surface 31 of the cross-fire tube 3 , and the plate surfaces of the two outermost vertical fins 2 are perpendicular to the elliptical minor axis 32 of the cross-fire tube 3 .

[0019] The flame tube cross-fire tube cooling device of the present application increases the heat exchange area of ​​the cross-fire tube, strengthens the heat exchange, and reduces the temperature of the entire cross-fire tube, especially the root. Figure 2 As shown, the horizontal fin 1 is parallel to the cross-fire tube outlet end face 31, and is arranged in sequence from the rounded end 33 at the root of the cross-fire tube outward. The two outermost fins of the vertical fin 2 are respectively perpendicular to the elliptical short axis 32 of the inner profile of the cross-fire tube to avoid blocking the airflow outside the cross-fire tube, and the front end surface is made into a large contact area 21 of the arc surface to increase the contact area between the fin and the cross-fire tube. In use, the cooling device is directly put on the cross-fire tube, the inner side of the cooling device is in contact with the outer profile of the cross-fire tube, and the lower side of the cooling device is completely in contact with the root of the cross-fire tube, which prolongs the service life of the cross-fire tube and ensures the stable ignition and cross-fire of the combustion chamber.

[0020] In some optional embodiments, the number of the horizontal fins 1 is 3-5, and the number of the vertical fins 2 is 5-8. Figure 1 In the given embodiment, the number of the horizontal fins 1 is 3, and the number of the vertical fins 2 is 5.

[0021] In some optional embodiments, the semi-enclosed structure formed by the horizontal fins 1 is an elliptical structure with a length of 2 / 3 of the ring. Figure 1 and Figure 2 The elliptical structure of the horizontal fins is used to fix the cooling device in the axial and circumferential directions. The upper side of the cooling device is fitted with the sleeve, and the installation and positioning of the cooling device is achieved without adding any parts.

[0022] In some optional embodiments, the horizontal fins 1 have a fin thickness of 1.3-1.7 mm, a width of 2.8-3.2 mm, and a spacing of 1.8-2.2 mm between adjacent fins. For example, the horizontal fins 1 have a fin thickness of 1.5 mm, a width of 3 mm, a spacing of 2 mm between adjacent horizontal fins, and a spacing of 1.5 mm between adjacent vertical fins.

[0023] In some optional embodiments, the lower end surface of each of the vertical fins 2 is an arc surface 22 to fit on the root chamfer profile of the cross-fire tube 3 .

[0024] In some optional embodiments, reference Figure 1 The area of ​​each vertical fin 2 that fits the outer wall of the cross-fire tube 3 is an arc-shaped area 23 and is integrated with the inner surface of the horizontal fin 1.

[0025] In some optional embodiments, the horizontal fins 1 and the vertical fins 2 are integrally formed. In alternative embodiments, they can also be processed and assembled by means of clamping or bolting.

[0026] Although the present application has been described in detail above with general descriptions and specific implementation schemes, it is obvious to those skilled in the art that some modifications or improvements may be made to the present application. Therefore, these modifications or improvements made without departing from the spirit of the present application all fall within the scope of protection claimed in the present application.

Claims

1. A flame tube cross-fire tube cooling device, characterized in that: The invention comprises a plurality of horizontal fins (1) and a plurality of vertical fins (2), wherein the plurality of horizontal fins (1) are arranged in parallel to form a semi-enclosed structure for being clamped on the outer wall of a cross-fire tube (3), each vertical fin (2) is arranged outside the middle position of the semi-enclosed structure of the horizontal fin (1), and the plurality of horizontal fins (1) are connected as a whole, and the roots of the two outermost vertical fins (2) extend along the inner annular surface of the semi-enclosed structure to form a large contact area (21); When the flame tube cross-fire tube cooling device is installed on the cross-fire tube (3), the plate surface of each horizontal fin (1) is parallel to the outlet end surface (31) of the cross-fire tube (3), and the plate surfaces of the two outermost vertical fins (2) are perpendicular to the elliptical minor axis (32) of the cross-fire tube (3).

2. The flame tube cross-fire cooling device according to claim 1, characterized in that: The number of the horizontal fins (1) is 3-5, and the number of the vertical fins (2) is 5-8.

3. The flame tube cross-fire tube cooling device according to claim 1, characterized in that: The semi-enclosed structure formed by the horizontal fins (1) is an elliptical structure with a length of 2 / 3 of the ring.

4. The flame tube cross-fire cooling device according to claim 1, characterized in that: The horizontal fins (1) have a fin thickness of 1.3-1.7 mm, a width of 2.8-3.2 mm, and a distance between adjacent fins of 1.8-2.2 mm.

5. The flame tube and cross-fire tube cooling device according to claim 1, characterized in that: The lower end surface of each vertical fin (2) is a circular arc surface (22) so as to fit and adhere to the root chamfer profile of the cross-fire tube (3).

6. The flame tube cross-fire cooling device according to claim 1, characterized in that: The area of ​​each vertical fin (2) that fits the outer wall of the cross-fire tube (3) is an arc-shaped area (23) and is integrated with the inner surface of the horizontal fin (1).

7. The flame tube and cross-fire tube cooling device according to claim 1, characterized in that: The horizontal fins (1) and the vertical fins (2) are integrally formed.

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