A water-cooled pilot ring for an air heater pilot torch

Abstract

The application belongs to the technical field of combustion wind tunnel, and discloses a water-cooled ignition ring for an air heater ignition torch. The water-cooled ignition ring comprises a cooling outer ring and a cooling inner ring which are connected in a nested manner from outside to inside, the cooling outer ring is provided with corresponding annular clamping grooves and clamping rings on both sides, and the water-cooled ignition ring is connected with adjacent sections through the clamping grooves and the clamping rings. The water-cooled ignition ring is provided with a cooling water outlet and an opposite cooling water inlet. The contact surfaces of the cooling outer ring and the cooling inner ring are provided with annular water-cooled channels, the cooling outer ring is internally provided with a water collecting cavity which is communicated with the annular water-cooled channels, and the cooling water outlet and the cooling water inlet extend into the water collecting cavity. The water-cooled ignition ring is further provided with a torch interface which penetrates through the cooling outer ring and the cooling inner ring, and the torch interface and the cooling water outlet and the cooling water inlet are staggered. The water-cooled ignition ring has the advantages of small volume, simple structure, low manufacturing cost, good heat insulation effect and the like, and can be applied to the air heater of the combustion wind tunnel.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of combustion wind tunnel, and particularly relates to a water-cooled ignition ring for an air heater ignition torch. BACKGROUND

[0002] The air heater commonly used in combustion wind tunnels is a reliable ignition device with a torch capable of generating stable high-temperature duty flame. The actual working duration of the torch is relatively short, usually 2-3 seconds, but due to the high-temperature air supply flushing of the connecting part of the combustion wind tunnel and the air heater for a long time, the thermal load is increased, and special thermal protection and cooling measures need to be set. The closer the connecting part is to the upstream fuel injection panel, the smaller the thermal load it bears.

[0003] The commonly used air heater is composed of an injection panel, an ignition section and a combustion chamber sequentially connected through flanges; the torch is installed on the ignition section through welding or threaded fixing; the inner walls of the injection panel, the ignition section and the combustion chamber are provided with water cooling channels; the injection panel is surrounded by an injection panel water cooling channel, which is in communication with the water cooling channels of the injection panel; the ignition section is surrounded by an ignition section water cooling channel, which is in communication with the water cooling channels of the ignition section; the combustion chamber is surrounded by a combustion chamber water cooling channel, which is in communication with the water cooling channels of the combustion chamber. Among them, the ignition section water cooling channel is used to cool the connection between the torch and the ignition section.

[0004] The cooling scheme of this torch has the following problems: 1. The ignition section has a large volume, a complex structure and a high manufacturing cost; 2. Due to the presence of the connecting flanges between the sections, the distance between the connection of the torch and the ignition section and the upstream injection panel is increased, and the thermal load of the torch is large, and under the condition that the temperature of the combustion chamber is high, the connection has the risk of damage.

[0005] Currently, there is an urgent need to develop a water-cooled ignition ring for an air heater ignition torch. SUMMARY

[0006] The technical problem to be solved by the present application is to provide a water-cooled ignition ring for an air heater ignition torch to solve the problem of thermal protection and cooling of the torch.

[0007] The water-cooled ignition ring for an air heater ignition torch of the present application has the characteristics that the water-cooled ignition ring comprises a cooling outer ring and a cooling inner ring nested and connected from outside to inside, the left and right sides of the cooling outer ring are provided with corresponding annular clamping grooves and clamping rings, and the water-cooled ignition ring is connected with the adjacent section of the air heater through the clamping grooves and clamping rings.

[0008] The water-cooled ignition ring is provided with a cooling water inlet and an opposite cooling water outlet.

[0009] Several annular water cooling channels are provided on the contact surface of the cooling outer ring and the cooling inner ring. A water collecting cavity is provided inside the cooling outer ring, which is connected to the annular water cooling channels. The water cooling channels are arranged around the torch interface to avoid the water inlet and outlet.

[0010] The water-cooled ignition ring is also provided with two torch interfaces that penetrate the cooling outer ring and the cooling inner ring. The torch interfaces are staggered with the cooling water inlet and the cooling water outlet. The intersection angle of the central axis of the two torch interfaces ranges from 90° to 150°.

[0011] High-pressure cooling water enters the water collecting chamber from the cooling water inlet, and then flows through the water cooling channel to cool the water-cooled ignition ring.

[0012] Furthermore, the pressure range of the high-pressure cooling water is 1MPa~2MPa.

[0013] Furthermore, the water-cooled ignition ring is suitable for a combustion wind tunnel with a Mach number of 3 to Mach number 7, and the total temperature range of the incoming flow of the combustion wind tunnel is 900K-2100K.

[0014] Furthermore, the material of the cooling inner ring is copper, and the material of the cooling outer ring is stainless steel.

[0015] The water-cooled ignition ring for an air heater ignition torch of the present invention reduces the volume of the ignition section and lowers the manufacturing cost. While retaining the water-cooling structure, it shortens the distance between the torch and the upstream injection panel and reduces the heat load at the connection between the torch and the air heater.

[0016] In short, the water-cooled ignition ring for an ignition torch of an air heater of the present invention has a small size, a simple structure, a low manufacturing cost, and a good heat insulation effect, and can be applied to air heaters of combustion wind tunnels. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic cross-sectional view of a water-cooled ignition ring for an air heater ignition torch according to the present invention;

[0018] Figure 2 AA is a schematic cross-sectional view of a water-cooled ignition ring for an air heater ignition torch according to the present invention;

[0019] Figure 3 BB is a cross-sectional schematic diagram of a water-cooled ignition ring for an ignition torch of an air heater according to the present invention;

[0020] Figure 4 This is a CC cross-sectional schematic diagram of a water-cooled ignition ring for an air heater ignition torch according to the present invention;

[0021] Figure 5This is a partial schematic diagram of the connection between the cooling inner ring and the torch interface in the water-cooled ignition ring for an air heater ignition torch of the present invention.

[0022] In the figure, 1. Cooling outer ring; 2. Cooling water outlet; 3. Torch interface; 4. Cooling water inlet; 5. Cooling inner ring; 6. Water cooling channel; 7. Water collecting chamber; 8. Retaining ring; 9. Retaining groove. Implementation Method

[0023] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0024] like Figures 1 to 5 As shown, the water-cooled ignition ring for an air heater ignition torch of the present invention comprises a cooling outer ring 1 and a cooling inner ring 5 nested and connected from the outside to the inside. Corresponding annular clamping grooves 9 and clamping rings 8 are provided on the left and right sides of the cooling outer ring 1. The water-cooled ignition ring is connected to the adjacent section of the air heater through the clamping grooves 9 and the clamping rings 8.

[0025] The water-cooled ignition ring is provided with a cooling water inlet 4 and an opposite cooling water outlet 2;

[0026] Several annular water cooling channels 6 are provided on the contact surface of the cooling outer ring 1 and the cooling inner ring 5. A water collecting chamber 7 is provided inside the cooling outer ring 1. The water collecting chamber 7 is connected to the annular water cooling channels 6. The water cooling channels 6 are arranged around the torch interface 3 to avoid the water inlet 2 and the cooling water inlet 4.

[0027] The water-cooled ignition ring is also provided with two torch interfaces 3 that penetrate the cooling outer ring 1 and the cooling inner ring 5. The torch interfaces 3 are staggered with the cooling water inlet 4 and the cooling water outlet 2. The intersection angle of the central axes of the two torch interfaces 3 ranges from 90° to 150°.

[0028] High-pressure cooling water enters the water collecting chamber 7 from the cooling water inlet 4 and then flows through the water cooling channel 6 to cool the water-cooled ignition ring.

[0029] Furthermore, the pressure range of the high-pressure cooling water is 1MPa~2MPa.

[0030] Furthermore, the water-cooled ignition ring is suitable for a combustion wind tunnel with a Mach number of 3 to Mach number 7, and the total temperature range of the incoming flow of the combustion wind tunnel is 900K-2100K.

[0031] Furthermore, the material of the cooling inner ring 5 is copper, and the material of the cooling outer ring 1 is stainless steel.

[0032] Example 1

[0033] The cross-sectional dimensions of the water-cooling channels 6 in this embodiment are 3 mm×3 mm, with a total of 6 channels; the water collecting cavity 7 is 33 mm wide and 15 mm high, with a corresponding central angle of 15 degrees.

[0034] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and embodiments, and can be applied to various fields suitable for the present invention. It will be understood by those skilled in the art that the present invention is not limited to the specific details and illustrations shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims

1. A water-cooled ignition ring for an air heater ignition torch, characterized in that: The water-cooled ignition ring comprises a cooling outer ring (1) and a cooling inner ring (5) which are nested and connected from the outside to the inside. Corresponding annular clamping grooves (9) and clamping rings (8) are provided on the left and right sides of the cooling outer ring (1). The water-cooled ignition ring is connected to adjacent sections of the air heater via the clamping grooves (9) and the clamping rings (8). The water-cooled ignition ring is provided with a cooling water inlet (4) and an opposite cooling water outlet (2); A plurality of annular water cooling channels (6) are provided on the contact surfaces of the cooling outer ring (1) and the cooling inner ring (5); a water collecting chamber (7) is provided inside the cooling outer ring (1); the water collecting chamber (7) is communicated with the annular water cooling channel (6); the water cooling channel (6) is arranged to circumvent the torch interface (3); the cooling water outlet (2) and the cooling water inlet (4) extend into the water collecting chamber (7); The water-cooled ignition ring is also provided with two torch interfaces (3) penetrating the cooling outer ring (1) and the cooling inner ring (5). The torch interfaces (3) are arranged alternately with the cooling water inlet (4) and the cooling water outlet (2). The intersection angle of the central axes of the two torch interfaces (3) ranges from 90° to 150°. High-pressure cooling water enters the water collecting chamber (7) from the cooling water inlet (4), and then flows through the water cooling channel (6) to cool the water-cooled ignition ring; The water-cooled ignition ring reduces the volume of the ignition section, shortens the distance between the flare interface (3) and the upstream injection panel while retaining the water-cooling structure, and reduces the heat load at the connection between the flare interface (3) and the air heater.

2. The water-cooled ignition ring for an air heater ignition torch according to claim 1, characterized in that: The pressure range of the high-pressure cooling water is 1MPa~2MPa.

3. The water-cooled ignition ring for an air heater ignition torch according to claim 1, characterized in that: The water-cooled ignition ring is suitable for a combustion wind tunnel with a Mach number of 3 to Mach number 7, and the total temperature range of the incoming flow of the combustion wind tunnel is 900K-2100K.

4. The water-cooled ignition ring for an air heater ignition torch according to claim 1, characterized in that: The material of the cooling inner ring (5) is copper, and the material of the cooling outer ring (1) is stainless steel.

Images