Combustion chamber ignition device

Abstract

The present invention relates to a combustion chamber ignition device, including a combustion chamber cavity, an insulating tube and an igniter, wherein the igniter includes an ignition end and a sliding rod, wherein the insulating tube is sleeved on the middle section of the sliding rod, and one end of the insulating tube is fixed on the side wall of the combustion chamber cavity, so that the ignition end located at the end of the sliding rod is located in the combustion chamber cavity, and the inner side of the side wall of the combustion chamber cavity is provided with an interlocking groove that matches the shape of the ignition end, and when the sliding rod moves outward along the insulating tube, the ignition end is embedded in the interlocking groove. Compared with the prior art, the present invention realizes ignition through discharge between the ignition end and the side wall; when the ignition is completed, the ignition end is embedded in the interlocking groove of the side wall, which can not only provide good protection for the igniter and extend its service life, but also prevent the ignition end from interfering with the flow field and avoiding interference with the experimental shooting of the combustion chamber.

Description

Technical Field

[0001] The invention relates to the field of igniters, in particular to a combustion chamber ignition device. Background Art

[0002] In order to solve the ignition problem of the combustion chamber, the existing method is usually to install an igniter in the combustion chamber. The igniter has two electrodes, which generate energy through discharge between the electrodes to ignite the combustibles in the combustion chamber. However, in this process, the electrodes of the igniter will be exposed to the combustion chamber for a long time, and will be worn out over time. In addition, for the combustion chamber in the laboratory, the electrodes in the combustion chamber cavity will affect the stability of the flow field and emit very bright light, which seriously affects the shooting of the flame self-luminescence. Therefore, the market needs an automatic ignition device that does not interfere with the combustion chamber. Summary of the invention

[0003] The purpose of the present invention is to provide a combustion chamber ignition device in order to overcome the defects of the above-mentioned prior art.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] A combustion chamber ignition device includes a combustion chamber cavity, an insulating tube and an igniter, the igniter includes an ignition end and a sliding rod, the insulating tube is sleeved on the middle section of the sliding rod, and one end of the insulating tube is fixed to the side wall of the combustion chamber cavity, so that the ignition end located at the end of the sliding rod is located in the combustion chamber cavity, and the inner side of the side wall of the combustion chamber cavity is provided with an interlocking groove that is adapted to the shape of the ignition end, and when the sliding rod moves outward along the insulating tube, the ignition end is embedded in the interlocking groove.

[0006] Furthermore, the end surface of the ignition end away from the sliding rod and the inner surface of the side wall of the combustion chamber cavity form a coplanar surface.

[0007] Furthermore, the edge side of the ignition end is provided with a sharp-angled convex edge facing the side wall.

[0008] Furthermore, the outer ring of the sliding rod is provided with a tail ferrule and a head ferrule, the tail ferrule is fixed to the tail end of the sliding rod, and the head ferrule is fixed to the connection between the ignition end and the sliding rod.

[0009] Furthermore, the tail ferrule is provided with a tail cone angle facing the insulating tube, and the head ferrule is provided with a head cone angle facing the insulating tube.

[0010] Furthermore, the tail ferrule and the head ferrule are made of copper.

[0011] Furthermore, inner circle edges at both ends of the insulating tube are provided with inscribed angles.

[0012] Furthermore, the insulating tube is a ceramic tube.

[0013] Furthermore, it also includes a high-voltage power supply, the side wall of the combustion chamber cavity is connected to the negative pole of the high-voltage power supply, and the igniter is connected to the positive pole of the high-voltage power supply.

[0014] Furthermore, it also includes a control system, which includes a drive module, a controller and a thermocouple, the thermocouple is installed on the side wall of the combustion chamber cavity, the drive module is connected to the sliding rod, drives the sliding rod to move back and forth in the insulating sleeve, and the controller is connected to the thermocouple, the drive module and the high-voltage power supply.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention is provided with an igniter that can move in the insulating tube, and ignition is achieved by discharge between the ignition end and the side wall; when the ignition is completed, the ignition end is embedded in the interlocking groove of the side wall, which can not only provide good protection for the igniter and extend its service life, but also prevent the ignition end from interfering with the flow field and avoiding interference with the experimental shooting of the combustion chamber.

[0017] 2. In the present invention, the edge of the ignition end is provided with a sharp convex edge; when the ignition end is a certain distance from the side wall of the combustion chamber, the sharp convex edge and the edge of the fitting groove are easy to generate discharge, thereby improving the ignition efficiency of the igniter. At the same time, this structure can improve the airtightness of the ignition end and the fitting groove.

[0018] 3. A tail ferrule and a head ferrule are arranged at both ends of the igniter sliding rod. When the igniter moves to both ends of the insulating rod, a sealing structure is formed to improve the safety of the combustion chamber.

[0019] 4. The present invention also includes a control system to realize full-automatic ignition and control of the igniter, which is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention.

[0021] Figure 2 It is the structural diagram of the control system.

[0022] Figure 3 This is a schematic diagram of the installation structure of the tail ferrule.

[0023] Figure 4 This is a schematic diagram of the installation structure of the head ferrule.

[0024] Figure numerals: 1. combustion chamber cavity, 11. side wall, 12. fitting groove, 2. insulating tube, 21. internal cut angle, 3. igniter, 31. ignition end, 31a, pointed convex edge, 32. sliding rod, 4. tail ferrule, 41. tail cone angle, 5. head ferrule, 51. head cone angle, 6. high voltage power supply, 7. control system, 71. drive module, 72. controller, 73. thermocouple. DETAILED DESCRIPTION

[0025] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0026] like Figure 1 As shown, this embodiment provides a combustion chamber ignition device, including a combustion chamber cavity 1, an insulating tube 2 and an igniter 3. The igniter 3 includes an ignition end 31 and a sliding rod 32 connected to each other; the insulating tube 2 is sleeved on the middle section of the sliding rod 32, and one end of the insulating tube 2 is vertically fixed on the side wall 11 of the combustion chamber cavity 1, so that the ignition end 31 located at the end of the sliding rod 32 is in the combustion chamber cavity 1. The inner side of the side wall 11 of the combustion chamber cavity 1 is provided with an interlocking groove 12 that is adapted to the shape of the ignition end 31. When the sliding rod 32 moves outward or inward along the insulating tube 2, the ignition end 31 is embedded in the interlocking groove 12 or leaves the interlocking groove 12 and is a distance away from the combustion chamber side wall 11. In this embodiment, an external high-voltage power supply 6 is provided, the negative pole of the high-voltage power supply 6 is connected to the side wall 11 of the combustion chamber cavity 1, and the positive pole is connected to the sliding rod 32 of the igniter 3. Therefore, when the ignition end 31 is at a distance from the combustion chamber side wall 11 and is energized, the side wall 11 and the ignition end 31 form an electric discharge so that the gas inside the combustion chamber can be ignited.

[0027] like Figure 2 As shown, this embodiment also includes a control system 7 to realize the automatic ignition function. The control system 7 includes a drive module 71, a controller 72 and a thermocouple 73. The thermocouple 73 is installed on the side wall 11 of the combustion chamber cavity 1 to monitor the temperature in the combustion chamber; the drive module 71 adopts an existing mechanical drive structure to drive the extension and retraction of the sliding rod 32 of the igniter 3, which can be a cylinder or a motor and a screw structure, etc., without limitation; the controller 72 adopts a conventional computer or intelligent device, and the controller 72 is connected to the thermocouple 73, the drive module 71 and the high-voltage power supply 6, and the specific control process is as follows:

[0028] During ignition, there is a certain distance between the ignition end 31 and the side wall 11 of the combustion chamber cavity 1, and the high voltage power supply 6 is controlled to start, and combustion gas has been introduced into the combustion chamber. The ignition end 31 and the combustion chamber side wall 11 generate electric sparks to ignite the gas, thereby achieving ignition.

[0029] After ignition, the temperature in the combustion chamber rises, and the thermocouple 73 detects a high temperature signal, which is fed back to the controller 72, which controls the high-voltage power supply 6 to stop discharging and gives a reversal signal to the drive module 71. The ignition end 31 moves toward the side wall 11 until it fits into the fitting groove 12. This step protects the ignition end 31 and prevents it from affecting the flame flow field and interfering with the experimental shooting.

[0030] In this embodiment, the end surface of the ignition end 31 away from the sliding rod 32 and the inner side of the side wall 11 of the combustion chamber cavity 1 form a coplanar surface, so that the ignition end 31 has the least effect on the flame flow field in the combustion chamber. The edge side of the ignition end 31 is provided with a sharp angle convex edge 31a facing the sliding rod 32, which is more conducive to tip discharge and improves the ignition efficiency of the igniter 3. The position of the edge side can be adjusted according to the shape of the ignition end 31; at the same time, this structure can make it more difficult for the gas in the combustion chamber to escape, and improve the airtightness of the ignition end 31 and the fitting groove 12 when fitting.

[0031] like Figure 3 and Figure 4 As shown, the outer ring of the sliding rod 32 is provided with a tail ferrule 4 and a head ferrule 5. The tail ferrule 4 is fixed to the tail end of the sliding rod 32; the head ferrule 5 is fixed to the connection between the ignition end 31 and the sliding rod 32. The tail ferrule 4 is provided with a tail cone angle 41 facing the insulating tube 2, and the head ferrule 5 is provided with a head cone angle 51 facing the insulating tube 2. An inscribed angle 21 is provided at the inner ring edge at both ends of the insulating tube 2, and the angle of the inscribed angle 21 is greater than the angles of the tail cone angle 41 and the head cone angle 51. During ignition, the tail cone angle 41 is inserted into the gap between the insulating ring and the sliding rod 32 to achieve structural sealing; after ignition, as the igniter 3 moves, the head cone angle 51 is inserted into the gap between the insulating ring and the sliding rod 32 to achieve structural sealing. The inscribed angle 21 forms a certain buffer against the cone angle and improves the sealing effect.

[0032] In this embodiment, the tail ferrule 4 and the head ferrule 5 are made of conventional copper ferrules; the insulating tube 2 is made of a ceramic tube, taking both life and strength into consideration.

[0033] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A combustion chamber ignition device, characterized in that: The igniter (3) comprises a combustion chamber body (1), an insulating tube (2) and an igniter (3), wherein the igniter (3) comprises an ignition end (31) and a sliding rod (32), wherein the insulating tube (2) is sleeved on the middle section of the sliding rod (32), and one end of the insulating tube (2) is fixed on the side wall (11) of the combustion chamber body (1), so that the ignition end (31) located at the end of the sliding rod (32) is located in the combustion chamber body (1), and an engaging groove (12) matching the shape of the ignition end (31) is provided on the inner side of the side wall (11) of the combustion chamber body (1), and when the sliding rod (32) moves outward along the insulating tube (2), the ignition end (31) is embedded in the engaging groove (12); The end surface of the ignition end (31) away from the sliding rod (32) and the inner surface of the side wall (11) of the combustion chamber cavity (1) form a coplanar surface; The edge side of the ignition end (31) is provided with a sharp-angled convex edge (31a) facing the side wall (11); The outer ring of the sliding rod (32) is provided with a tail ferrule (4) and a head ferrule (5), the tail ferrule (4) is fixed to the tail end of the sliding rod (32), and the head ferrule (5) is fixed to the connection between the ignition end (31) and the sliding rod (32); The tail ferrule (4) is provided with a tail cone angle (41) facing the insulating tube (2), and the head ferrule (5) is provided with a head cone angle (51) facing the insulating tube (2); The tail ferrule (4) and the head ferrule (5) are made of copper; Inner edges at both ends of the insulating tube (2) are provided with inscribed corners (21).

2. A combustion chamber ignition device according to claim 1, characterized in that: The insulating tube (2) is a ceramic tube.

3. A combustion chamber ignition device according to claim 1, characterized in that: It also includes a high-voltage power supply (6), the side wall (11) of the combustion chamber cavity (1) is connected to the negative pole of the high-voltage power supply (6), and the igniter (3) is connected to the positive pole of the high-voltage power supply (6).

4. A combustion chamber ignition device according to claim 1, characterized in that: The control system (7) further comprises a drive module (71), a controller (72) and a thermocouple (73), wherein the thermocouple (73) is mounted on a side wall (11) of the combustion chamber cavity (1), the drive module (71) is connected to a sliding rod (32) to drive the sliding rod (32) to move forward and backward in the insulating sleeve, and the controller (72) is connected to the thermocouple (73), the drive module (71) and a high-voltage power supply (6).

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