An automatic ignition device for a turbojet engine bench
By automatically controlling the position of the high-energy igniter, the problem of reduced service life of the high-energy igniter under high-temperature environment in turbojet engine testing was solved, and the service life of the high-energy igniter was extended.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHAANXI NORTH DYNAMIC CO LTD
- Filing Date
- 2025-05-21
- Publication Date
- 2026-05-29
AI Technical Summary
During turbojet engine testing, the exhaust gas generates high temperatures after being ignited. Testers manually control the high-energy igniter to disengage, extending its time in the high-temperature environment, which reduces its service life.
Design an automatic ignition device that uses a temperature sensor to detect the exhaust temperature and connects to an ignition controller composed of a PLC controller and relays via wires. The device automatically controls an electric push rod to move the high-energy ignition head away from the center of the exhaust flow before ignition and quickly removes it from the high-temperature area after successful ignition.
Reduce the time that the high-energy igniter spends in a high-temperature environment, thus extending its service life.
Smart Images
Figure CN224300981U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of turbojet engine testing technology, and in particular to an automatic ignition device for a turbojet engine test bench. Background Technology
[0002] Currently, during turbojet engine testing, the solenoid valve is first manually opened to allow compressed air to blow the engine. Then, the solenoid valve is manually opened to allow propane gas to be introduced into the engine. As the engine rotates, the air and propane gas mix and are discharged from the engine exhaust. The high-energy igniter is positioned at the center of the exhaust gas flow at the engine exhaust. After the propane and air mix and are discharged from the engine, the high-energy igniter is manually controlled to ignite the gas. After ignition, the on-site test personnel judge whether the ignition is successful based on the increase in engine speed. After successful ignition, the high-energy igniter is manually moved away from the center of the engine exhaust gas flow.
[0003] However, during the implementation of the above technical solution, at least the following technical problems were found: After the exhaust is ignited, it will generate high temperature. If the tester determines whether the ignition is successful and then manually controls the high-energy igniter to disconnect, the high-energy igniter will be in a high-temperature environment for a long time, which will reduce the service life of the high-energy igniter. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides an automatic ignition device for a turbojet engine test bench. This solves the technical problem that after the exhaust is ignited, it generates high temperatures. If the test personnel manually control the high-energy igniter to disengage after judging whether the ignition is successful, the high-energy igniter will be exposed to a high-temperature environment for a long time, which will reduce the service life of the high-energy igniter.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] An automatic ignition device for a turbojet engine test bench includes a test bench and an operating table. An engine body is mounted on the test bench. An exhaust port and an air inlet are provided on the side end of the engine body. An electric actuator controller is mounted on the test bench. An electric actuator is mounted on the electric actuator controller. A high-energy ignition head is mounted on the electric actuator.
[0007] Preferably, the test bench has an exhaust channel on its side.
[0008] Preferably, a temperature sensor is installed inside the exhaust passage.
[0009] Preferred option: An ignition controller is installed on the control panel.
[0010] Preferably, a first wire is installed between the ignition controller and the temperature sensor.
[0011] Preferably, a second wire is installed between the ignition controller and the electric push rod, and the outer wall of the second wire is coated with a fire-retardant and high-temperature resistant coating.
[0012] Preferably, a third wire is installed between the electric actuator controller and the ignition controller.
[0013] Preferably, the ignition controller consists of a PLC controller and a relay.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] Before ignition, the electric pushrod is in the retracted state, meaning the high-energy ignition head is far from the center of the exhaust gas flow. Propane gas is introduced into the engine through the intake port. The propane gas mixes with air inside the engine and is then ejected by the electric pushrod controller. The tester then presses the ignition controller's start button. The ignition controller sends an electrical signal to the electric pushrod controller via a third wire. The electric pushrod controller initiates the extension of the electric pushrod, pushing the high-energy ignition head to the center of the exhaust gas flow. After a one-second delay, the ignition controller... The second wire sends an electrical signal to the high-energy igniter, causing it to ignite. If ignition is successful, the temperature sensor in the exhaust passage will detect that the exhaust temperature exceeds 200 degrees Celsius. The temperature sensor transmits the temperature data to the ignition controller via the first wire. The ignition controller then sends an electrical signal to the electric actuator controller via the third wire. The electric actuator controller will then control the electric actuator to retract and reset. The extension rod of the electric actuator will move the high-energy igniter away from the high-temperature area, reducing the time the high-energy igniter is in a high-temperature environment and thus extending its service life. Attached Figure Description
[0016] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.
[0017] Figure 1 This is an overall structural diagram of the present invention.
[0018] Legend: 1. Test bench; 2. Control panel; 3. Engine body; 4. Exhaust port; 5. Intake port; 6. Electric actuator controller; 7. Electric actuator; 8. High-energy ignition head; 9. Exhaust passage; 11. Temperature sensor; 12. Ignition controller; 13. First wire; 14. Second wire; 15. Third wire. Detailed Implementation
[0019] This application provides an automatic ignition device for a turbojet engine test bench, effectively solving the technical problem that after exhaust ignition, high temperatures are generated. Manually disengaging the high-energy igniter after the tester determines ignition success would keep the igniter in a high-temperature environment for an extended period, reducing its lifespan. Before ignition, the electric push rod is in a retracted state, meaning the high-energy ignition head is far from the exhaust gas flow center. Propane gas is introduced into the engine body through the intake port, mixes with air inside the engine body, and is then ejected by the electric push rod controller. The tester then presses the start button on the ignition controller, at which point the ignition controller sends a signal to the electric push rod controller via a third wire. An electrical signal triggers the electric actuator controller to extend the electric actuator, which pushes the high-energy ignition head to the center of the exhaust flow. After a one-second delay, the ignition controller sends an electrical signal to the high-energy ignition head via a second wire, initiating ignition. If ignition is successful, the temperature sensor in the exhaust passage detects that the exhaust temperature exceeds 200 degrees Celsius. The temperature sensor transmits the temperature data to the ignition controller via a first wire. The ignition controller then sends an electrical signal to the electric actuator controller via a third wire. The electric actuator controller then controls the electric actuator to retract and reset. The extension rod of the electric actuator pulls the high-energy ignition head away from the high-temperature area, reducing the time the high-energy ignition head is exposed to high temperatures and thus extending its lifespan.
[0020] Example
[0021] like Figure 1 As shown, the technical solution in this application embodiment effectively solves the technical problem that after the exhaust is ignited, it will generate high temperatures. If the high-energy igniter is manually disengaged after the tester determines whether ignition is successful, it will be kept in a high-temperature environment for a long time, which will reduce the service life of the high-energy igniter. The overall idea is as follows:
[0022] In view of the problems existing in the prior art, the present invention provides an automatic ignition device for a turbojet engine test bench, including a test bench 1 and an operating table 2. An engine body 3 is installed on the test bench 1. An exhaust port 4 is provided on the side end of the engine body 3, and an air inlet 5 is provided on the side end of the engine body 3.
[0023] Test bench 1 is equipped with an electric actuator controller 6, an electric actuator 7 is installed on the electric actuator controller 6, a high-energy ignition head 8 is installed on the electric actuator 7, an exhaust channel 9 is provided on the side of test bench 1, a temperature sensor 11 is installed inside the exhaust channel 9, an ignition controller 12 is installed on the control panel 2, and a first wire 13 is installed between the ignition controller 12 and the temperature sensor 11.
[0024] A second wire 14 is installed between the ignition controller 12 and the electric push rod 7. The outer wall of the second wire 14 is coated with a fire-retardant and high-temperature resistant coating. A third wire 15 is installed between the electric push rod controller 6 and the ignition controller 12. The ignition controller 12 is composed of a PLC controller and a relay.
[0025] Test bench 1: Serves as the support platform for the entire automatic ignition device and engine body 3, and provides installation positions for other components such as electric push rod controller 6 and exhaust channel 9, ensuring the stability and relative positional relationship of each component during the test process;
[0026] Control panel 2: Used to install ignition controller 12, providing operators with an interface to control the automatic ignition device, facilitating testers to perform start-up and other operations during the ignition process;
[0027] Engine body 3: This is the core object of the turbojet engine bench test. Propane gas is introduced through the air intake 5 to mix with air, providing a combustible mixture for ignition, and then discharged from the exhaust port 4.
[0028] Exhaust port 4: Located at the side end of the engine body 3, propane gas mixed with air is discharged from here to provide a combustible mixture for ignition;
[0029] Air inlet 5: used to introduce propane gas, so that the propane gas mixes with air inside the engine body 3 to form a combustible mixture, providing fuel for ignition and engine operation;
[0030] Electric actuator controller 6: Installed on the test bench 1, it receives electrical signals from the ignition controller 12 through the third wire 15, and controls the extension and retraction of the electric actuator 7 according to the signal, thereby adjusting the position of the high-energy ignition head 8;
[0031] Electric push rod 7: Installed on electric push rod controller 6, its telescopic rod can extend or retract under the control of electric push rod controller 6. When extended, it pushes the high-energy ignition head 8 installed at its end to the center of the exhaust gas flow. When retracted, it brings the high-energy ignition head 8 back away from the high-temperature area, thereby controlling the position of the high-energy ignition head 8 during the ignition process.
[0032] High-energy ignition head 8: Installed on electric push rod 7, it performs ignition operation after receiving electrical signal sent by ignition controller 12 through second wire 14, providing ignition energy to the combustible mixture in engine body 3, and realizing engine ignition and start-up;
[0033] Exhaust passage 9: Located on the side of test bench 1, connected to exhaust port 4 of engine body 3, guides the flow of exhaust gas discharged from the engine, and provides an installation position for temperature sensor 11 to detect exhaust temperature;
[0034] Temperature sensor 11: Installed inside the exhaust passage 9, it detects the temperature of the exhaust gas in the exhaust passage 9 in real time and transmits the temperature data to the ignition controller 12 through the first wire 13, providing a basis for the ignition controller 12 to determine whether the engine has been successfully ignited.
[0035] Ignition controller 12: Installed on the control panel 2, it consists of a PLC controller and a relay. It receives the start command from the tester, sends an electrical signal to the electric push rod controller 6 through the third wire 15 to control the electric push rod 7 to move. After a one-second delay, it sends an electrical signal to the high-energy ignition head 8 through the second wire 14 to ignite it. It receives temperature data from the temperature sensor 11, determines whether the ignition is successful based on the exhaust temperature, and sends a signal to the electric push rod controller 6 again through the third wire 15 to control the electric push rod 7 to retract and reset or continue to control the high-energy ignition head 8 to ignite. It is the control core of the entire automatic ignition process.
[0036] First wire 13: connects ignition controller 12 and temperature sensor 11, and is responsible for transmitting the exhaust temperature data detected by temperature sensor 11 to ignition controller 12, realizing the transmission of temperature data, and is the channel for ignition controller 12 to obtain temperature information.
[0037] Second wire 14: connects ignition controller 12 and electric push rod 7. The outer wall is coated with fire-retardant and high-temperature resistant coating. On the one hand, it transmits the electrical signal sent by ignition controller 12 to high-energy ignition head 8, so that high-energy ignition head 8 performs ignition operation. On the other hand, the fire-retardant and high-temperature resistant coating can prevent the wire from being damaged in the high-temperature environment of the engine and ensure the reliability of signal transmission.
[0038] The third wire 15 connects the electric actuator controller 6 and the ignition controller 12, transmits the electrical signals sent by the ignition controller 12 to the electric actuator controller 6, realizes the control of the electric actuator controller 6 by the ignition controller 12, and thus controls the action of the electric actuator 7. It is the signal transmission channel for controlling the electric actuator 7.
[0039] Working principle:
[0040] Before ignition, the electric pushrod 7 is in the retracted state, meaning the high-energy ignition head 8 is far from the center of the exhaust flow. Propane gas is introduced into the engine body 3 through the intake port 5. The propane gas mixes with air inside the engine body 3 and is then ejected by the electric pushrod controller 6. The tester then presses the start button on the ignition controller 12. At this time, the ignition controller 12 sends an electrical signal to the electric pushrod controller 6 through the third wire 15. The electric pushrod controller 6 activates the extension of the electric pushrod 7, which pushes the high-energy ignition head 8 to the center of the exhaust flow. After a one-second delay, the ignition controller 12 sends an electrical signal to the high-energy ignition head 8 through the second wire 14, causing the high-energy ignition head 8 to ignite. If ignition is successful, the temperature sensor 11 in the exhaust passage 9 will detect that the exhaust temperature exceeds 200 degrees Celsius. The temperature sensor 11 will transmit the temperature data to the ignition controller 12 via the first wire 13. The ignition controller 12 will send an electrical signal to the electric actuator controller 6 via the third wire 15. The electric actuator controller 6 will control the electric actuator 7 to retract and reset. The extension rod of the electric actuator 7 will drive the high-energy ignition head 8 away from the high-temperature area, which can reduce the time that the high-energy ignition head 8 is in the high-temperature environment, thereby improving the service life of the high-energy ignition head 8. If ignition is unsuccessful, the temperature in the exhaust passage 9 will not exceed 50 degrees Celsius. The ignition controller 12 will continue to control the high-energy ignition head 8 to ignite until ignition is successful.
[0041] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
Claims
1. An automatic ignition device for a turbojet engine test bench, comprising a test bench (1) and an operating table (2), characterized in that, An engine body (3) is installed on the test bench (1). An exhaust port (4) is provided on the side of the engine body (3). An air inlet (5) is provided on the side of the engine body (3). An electric push rod controller (6) is installed on the test bench (1). An electric push rod (7) is installed on the electric push rod controller (6). A high-energy ignition head (8) is installed on the electric push rod (7).
2. The automatic ignition device for a turbojet engine test bench as described in claim 1, characterized in that, The test bench (1) is provided with an exhaust channel (9) on its side.
3. An automatic ignition device for a turbojet engine test bench as described in claim 2, characterized in that, A temperature sensor (11) is installed inside the exhaust passage (9).
4. The automatic ignition device for a turbojet engine test bench as described in claim 1, characterized in that, An ignition controller (12) is installed on the control panel (2).
5. An automatic ignition device for a turbojet engine test bench as described in claim 4, characterized in that, A first wire (13) is installed between the ignition controller (12) and the temperature sensor (11).
6. An automatic ignition device for a turbojet engine test bench as described in claim 4, characterized in that, A second wire (14) is installed between the ignition controller (12) and the electric push rod (7), and the outer wall of the second wire (14) is coated with a fireproof and high-temperature resistant coating.
7. An automatic ignition device for a turbojet engine test bench as described in claim 4, characterized in that, A third wire (15) is installed between the electric actuator controller (6) and the ignition controller (12).
8. An automatic ignition device for a turbojet engine test bench as described in claim 6, characterized in that, The ignition controller (12) consists of a PLC controller and a relay.