Method and device for starting turbojet engine

Abstract

The invention relates to a turbojet engine starting method which comprises the following steps: step 1, starting an automobile chassis engine, enabling the automobile chassis engine to rotate and transmit power to a power takeoff through a gearbox, and enabling the power takeoff to transmit the power to an input shaft of an oil pump through a transmission shaft so as to drive the input shaft of the oil pump to rotate; 2, an input shaft of the oil pump drives the oil pump to rotate, hydraulic oil in the oil tank is extracted, meanwhile, the hydraulic oil is compressed in the oil pump along with rotation, pressure rises, and high-pressure oil is formed; 3, the high-pressure oil is conveyed in the oil pipe, a control valve on the oil pipe is opened, the high-pressure oil in the oil pipe is controlled to flow in the direction of the hydraulic motor, and the high-pressure oil is conveyed to the hydraulic motor; 4, a closed working cavity in the hydraulic motor is filled with high-pressure oil, and a rotor in the hydraulic motor rotates under the pushing action of the high-pressure oil; and 5, an output shaft of the hydraulic motor is connected with an input shaft of the turbojet engine, the input shaft of the turbojet engine is driven to rotate, and the turbojet engine is started.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile braking, and in particular relates to a method and device for starting a turbojet engine. Background Art

[0002] Starting an automotive turbojet engine requires an electric motor, which requires a dedicated external power source. This sometimes requires multiple or extended starts to bring the turbojet engine into normal operation. Therefore, using an electric motor to start a turbojet engine requires an external power source with a high starting current and a long discharge time. External power sources typically rely on batteries, but batteries, with their characteristics of instantaneous discharge, high current, long discharge times, and low power, are not ideal for turbojet starting. Summary of the Invention

[0003] The present invention aims to provide a method and device for starting a turbojet engine to solve the technical problems raised in the background technology.

[0004] To achieve the above object, the technical solution adopted by the present invention is: A method for starting a turbojet engine comprises the following steps: Step 1: Start the vehicle chassis engine, which rotates and transmits power to the power take-off through the gearbox. The power take-off transmits power to the input shaft of the oil pump through the transmission shaft, driving the input shaft of the oil pump to rotate. Step 2: The input shaft of the oil pump drives the oil pump to rotate, extracting the hydraulic oil from the oil tank. At the same time, the hydraulic oil is compressed in the oil pump as it rotates, and the pressure increases, forming high-pressure oil, which converts the mechanical energy generated by the rotation of the input shaft into hydraulic energy; Step 3: High-pressure oil is transmitted in the oil pipe. The control valve on the oil pipe is opened to control the high-pressure oil in the oil pipe to flow toward the hydraulic motor, thereby transmitting the high-pressure oil to the hydraulic motor. Step 4: The sealed working chamber inside the hydraulic motor is filled with high-pressure oil. Under the driving force of the high-pressure oil, the rotor inside the hydraulic motor rotates, converting the high-pressure hydraulic energy into mechanical energy. Step 5: The output shaft of the hydraulic motor is connected to the input shaft of the turbojet engine, and the mechanical energy is transmitted to the input shaft of the turbojet engine, thereby driving the rotation of the input shaft of the turbojet engine and starting the turbojet engine.

[0005] As a further improvement of the present invention, in step 3, an overflow valve is connected to the oil pipe. When the oil pressure at the oil inlet of the overflow valve is greater than the set threshold pressure of the overflow valve, the overflow valve opens and the high-pressure oil flows back to the oil pump inlet from the oil outlet of the overflow valve.

[0006] As a further improvement of the present application, in the step 1, the transmission shaft is connected with a rotating speed sensor, which monitors the rotating speed of the transmission shaft in real time, thereby ensuring the normal operation and efficiency of the hydraulic system.

[0007] As a further improvement of the present application, the overflow valve is installed on the oil pipe between the oil pump and the control valve.

[0008] Based on the above-mentioned starting device of a turbojet engine, it comprises a power take-off, a transmission shaft, a rotating speed sensor, an oil pump, an oil tank, an overflow valve, an oil pipe, a control valve, a hydraulic motor and a turbojet engine. The power take-off is used to be connected with the chassis engine of the automobile, the output shaft of which is coaxially connected with one end of the transmission shaft, and the other end of the transmission shaft is coaxially connected with the input shaft of the oil pump, and the transmission shaft is provided with a rotating speed sensor for monitoring the rotating speed thereof. The oil inlet of the oil pump is connected with the oil tank through a pipeline; the oil outlet of the oil pump is connected with the motor through the oil pipe, and the oil pipe is sequentially provided with an overflow valve and a control valve, the oil inlet of the overflow valve is communicated with the oil pipe, and the oil outlet is communicated with the oil inlet of the oil tank; the motor is connected with the turbojet engine.

[0009] The beneficial effects produced by the above technical solution are as follows: The present application utilizes the power provided by the chassis engine of the automobile to drive the hydraulic system to work, and the hydraulic system drives the hydraulic motor to drive the turbojet engine to rotate, thereby meeting the starting requirement of the turbojet engine. Compared with the mode of starting the electric motor by the power supply of the storage battery and then starting the turbojet engine, since the mechanical energy of the chassis engine of the automobile can be output for a long time with high power, the hydraulic system can be ensured to continuously operate, so that the hydraulic motor can output the rotational kinetic energy for a long time to drive the turbojet engine to rotate until the engine is started. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 The connection relationship of the embodiment 2 of the present application is shown in the figure; DETAILED DESCRIPTION

[0011] In order to better understand the purpose, structure and function of the present application, the present application is described in detail below in combination with the drawings.

[0012] Embodiment 1 A starting method of a turbojet engine, comprising the following steps: Step 1: Start the vehicle's chassis engine. The engine rotates and transmits power to the power take-off (PTO) through the gearbox. The PTO then transmits power to the oil pump's input shaft via a drive shaft, which in turn rotates the oil pump's input shaft. Furthermore, the drive shaft is connected to a speed sensor, which monitors the shaft's speed in real time to ensure the proper operation and efficiency of the hydraulic system.

[0013] Step 2: The input shaft of the oil pump drives the oil pump to rotate, extracting the hydraulic oil in the oil tank. At the same time, the hydraulic oil is compressed in the oil pump as it rotates, and the pressure increases to form high-pressure oil, which converts the mechanical energy generated by the rotation of the input shaft into hydraulic energy.

[0014] In step 3, high-pressure oil is transmitted within the oil pipe. The control valve on the oil pipe is opened to control the flow of high-pressure oil within the oil pipe toward the hydraulic motor, transmitting the high-pressure oil to the hydraulic motor. Furthermore, a relief valve is connected to the oil pipe. When the oil pressure at the relief valve's oil inlet exceeds the set threshold pressure of the relief valve, the relief valve opens, allowing high-pressure oil to flow back from the relief valve's oil outlet to the oil pump inlet. This limits the maximum pressure of the hydraulic system, preventing damage to the hydraulic system due to excessive pressure, preventing system overload, and protecting the system and its components. Specifically, the relief valve is installed on the oil pipe between the oil pump and the control valve.

[0015] Step 4: The sealed working chamber inside the hydraulic motor is filled with high-pressure oil. Under the driving force of the high-pressure oil, the rotor inside the hydraulic motor rotates, converting the high-pressure hydraulic energy into mechanical energy. Step 5: The output shaft of the hydraulic motor is connected to the input shaft of the turbojet engine, and the mechanical energy is transmitted to the input shaft of the turbojet engine, thereby driving the rotation of the input shaft of the turbojet engine and starting the turbojet engine.

[0016] The hydraulic system described above refers to a system consisting of an oil pump, oil tank, hydraulic motor, and oil pipes that utilizes the pressure of hydraulic oil to transmit pressure and motion. The present invention utilizes the vehicle chassis engine to provide power to drive the hydraulic system, which in turn drives the hydraulic motor, which in turn drives the turbojet engine, thereby meeting the turbojet engine starting requirements. Compared to battery-powered electric motors that in turn start the turbojet engine, the vehicle chassis engine's mechanical energy can be output at high power for extended periods of time, ensuring continuous operation of the hydraulic system. This allows the hydraulic motor to continuously output rotational kinetic energy, driving the turbojet engine until the engine starts.

[0017] Example 2 like Figure 1 As shown, this embodiment provides a starting device for a turbojet engine, which includes a power take-off, a transmission shaft, a speed sensor, an oil pump, an oil tank, a relief valve, an oil pipe, a control valve, a hydraulic motor and a turbojet engine; The power take-off is used to connect to the automobile chassis engine, and its output shaft is coaxially connected to one end of the transmission shaft, and the other end of the transmission shaft is coaxially connected to the input shaft of the oil pump, and a speed sensor for monitoring its speed is provided on the transmission shaft; The oil inlet of the oil pump is connected to the oil tank through a pipeline; the oil outlet of the oil pump is connected to the motor through the oil pipe, and a relief valve and a control valve are sequentially provided on the oil pipe, the oil inlet of the relief valve is connected to the oil pipe, and the oil outlet is connected to the oil inlet of the oil tank; the motor is connected to the turbojet engine.

[0018] It will be understood that the present invention is described by way of some embodiments, and it will be appreciated by those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A method for starting a turbojet engine, characterized in that: It includes the following steps: Step 1: Start the vehicle chassis engine, which rotates and transmits power to the power take-off through the gearbox. The power take-off transmits power to the input shaft of the oil pump through the transmission shaft, driving the input shaft of the oil pump to rotate. Step 2: The input shaft of the oil pump drives the oil pump to rotate, extracting the hydraulic oil from the oil tank. At the same time, the hydraulic oil is compressed in the oil pump as it rotates, and the pressure increases, forming high-pressure oil, which converts the mechanical energy generated by the rotation of the input shaft into hydraulic energy; Step 3: High-pressure oil is transmitted in the oil pipe. The control valve on the oil pipe is opened to control the high-pressure oil in the oil pipe to flow toward the hydraulic motor, thereby transmitting the high-pressure oil to the hydraulic motor. Step 4: The sealed working chamber inside the hydraulic motor is filled with high-pressure oil. Under the driving force of the high-pressure oil, the rotor inside the hydraulic motor rotates, converting the high-pressure hydraulic energy into mechanical energy. Step 5: The output shaft of the hydraulic motor is connected to the input shaft of the turbojet engine, and the mechanical energy is transmitted to the input shaft of the turbojet engine, thereby driving the rotation of the input shaft of the turbojet engine and starting the turbojet engine.

2. A method for starting a turbojet engine according to claim 1, characterized in that: In step 3, a relief valve is connected to the oil pipe. When the oil pressure at the oil inlet of the relief valve is greater than the set threshold pressure of the relief valve, the relief valve opens and the high-pressure oil flows back to the oil pump inlet from the oil outlet of the relief valve.

3. The method for starting a turbojet engine according to claim 1, wherein: In step 1, the transmission shaft is connected to a speed sensor, which monitors the speed of the transmission shaft in real time, thereby ensuring the normal operation and efficiency of the hydraulic system.

4. A method for starting a turbojet engine according to claim 2, characterized in that: The overflow valve is installed on the oil pipe between the oil pump and the control valve.

5. A turbojet engine starting device according to claim 1, characterized in that: It includes a power take-off, a transmission shaft, a speed sensor, an oil pump, an oil tank, a relief valve, an oil pipe, a control valve, a hydraulic motor and a turbojet engine; The power take-off is used to connect to the automobile chassis engine, and its output shaft is coaxially connected to one end of the transmission shaft, and the other end of the transmission shaft is coaxially connected to the input shaft of the oil pump, and a speed sensor for monitoring its speed is provided on the transmission shaft; The oil inlet of the oil pump is connected to the oil tank through a pipeline; the oil outlet of the oil pump is connected to the motor through the oil pipe, and a relief valve and a control valve are sequentially provided on the oil pipe, the oil inlet of the relief valve is connected to the oil pipe, and the oil outlet is connected to the oil inlet of the oil tank; the motor is connected to the turbojet engine.

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