Engine radial force measuring system and engine radial force measuring method based on displacement measurement
A technology of displacement measurement and measurement system, which is applied in the direction of measuring devices, force/torque/power measuring instruments, instruments, etc.
Active Publication Date: 2017-01-11
XIAN AEROSPACE PROPULSION TESTING TECHN INST
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Problems solved by technology
[0003] However, there is a lack of radial thrust measurement technology for ground test engines in the prior art
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[0028] The engine lateral force measurement system based on displacement measurement welds the displacement sensor fixing frame at the quadrant of the circular moving frame of the test bench above the engine, and fixes the four displacement sensors on the sensor fixing frame through elastic materials. The connecting wire end of the sensor is connected with the quadrant connecting line of the nozzle section of the engine through a stainless steel wire lead wire. Make sure the leads are stretched straight and that the sensor support is oriented parallel to the direction of the leads. Therefore, by supporting the frame, installing the sensor, connecting the lead wires, and establishing the offset measurement system.
[0029] A method for measuring engine radial force based on displacement measurement, comprising the following steps:
[0030] Step 1) Build the model:
[0031] Two models are established according to the lateral situation of the engine, such as figure 1 The model...
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The invention belongs to the aeroengine testing technology field, to be specific, relates to an engine radial force measuring system and an engine radial force measuring method based on displacement measurement. The engine radial force measuring system comprises 1# a displacement sensor, 2# a displacement sensor, 3# a displacement sensor, 4# a displacement sensor, a supporting rack, and lead wires. The four displacement sensors are fixedly disposed on the supporting rack, and the circumferences of the four displacement sensors are uniformly disposed on the upper part of the engine, and are respectively connected with the nozzle of the engine by the lead wires. The engine radial force measuring method comprises steps that the displacement sensors are used to measure the displacement amount of the circular surface of the nozzle, and then are used to calculate the mass center space displacement amount of the engine, and a displacement angle is calculated by the displacement amount, and then radial thrust is acquired according to a main thrust. The engine radial force measuring system and the engine radial force measuring method are used to fill the blank of the prior art of the lack of the testing of the engine radial force measurement technology, and reference data is provided for the design of the engine and later high-precision measurement.
Description
technical field [0001] The invention belongs to the technical field of aerospace engine tests, and in particular relates to an engine radial force measurement system and method based on displacement measurement. Background technique [0002] As the key performance parameter of liquid rocket engine ground test and rocket flight, thrust has very important research value. During the working process of the engine, the inhomogeneity of the gas flow out of the nozzle mouth is likely to occur due to insufficient combustion of the medium, which inevitably causes the phenomenon of nozzle deflection, thereby generating the instantaneous radial force of the engine. If the instantaneous radial force reaches a certain level, it will affect the flight control accuracy of the rocket body. Therefore, it is urgent to measure the radial thrust of the ground test engine, which will help to estimate the influence of the instantaneous radial thrust of the engine on the main thrust, and provide ...
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Login to View More IPC IPC(8): G01L5/00
CPCG01L5/00
Inventor 董冬赵建军刘英元单琳徐峰刘晓彭飞朱成亮耿直刘军胡瑛王晓华翟文化姚羽佳
Owner XIAN AEROSPACE PROPULSION TESTING TECHN INST