Force measuring apparatus of jet vane carried engine hot firing test

Abstract

The invention relates to a force measuring apparatus of a jet vane carried engine hot firing test. The force measuring apparatus comprises a measuring assembly, a driving mechanism, a transmission mechanism, a heat proof assembly, an installation pedestal, and a connection assembly. The measuring assembly is used for measuring an air load exerting force on a jet vane and a defection angle of the jet vane as well as comprises a strain gauge balance and an angular transducer and the like. The driving mechanism, which is a driving apparatus for deflection of the jet vane, is fixed on the installation pedestal and is composed of a motor and a reducer. The transmission mechanism mainly includes a gear wheel and a pinion, wherein the pinion is connected with an output shaft of the reducer and the gear wheel is fixed with an inner bearing sleeve of a bearing pedestal. The heat proof assembly is used for protecting the force measuring apparatus to be in an environment with a temperature for normal working during the test process. The connection assembly consists of a coupling band, an angular output shaft and a shaft coupling. And the installation pedestal is used for fixing all parts including the measuring assembly, the driving mechanism, and the heat proof assembly and the like as well as is connected with an external fixed mechanism. According to the force measuring apparatus provided in the invention, a jet vane can be driven to make deflection rapidly and accurately in an engine tail jet flow; and real-time measurement is carried out on an air load exerted on the jet vane and an actual deflection angle; therefore, the force measuring apparatus has good universality and can be used repeatedly.

Description

technical field [0001] The invention relates to a force measuring device for a thermal test run of an engine equipped with a gas rudder, belonging to the field of aerodynamic tests. Background technique [0002] With the development of thrust vectoring technology, gas rudders are used more and more as the actuators of missile thrust vector control. Due to the special characteristics of high temperature, strong corrosion and high scour, the jet flow of the engine is an unsteady jet flow, and it is difficult to obtain the real force of the gas rudder when it is working, whether it is theoretical calculation or wind tunnel test. The gas rudder is equipped with an engine hot test test to measure the force of the gas rudder under actual ablation conditions. The measurement results reflect the force of the gas rudder during the actual working process, which is the final data of the force of the gas rudder and the evaluation of the aerodynamic force of the gas rudder. The ultimate...

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Problems solved by technology

Due to the lack of gas rudder applications in the past, there were not many force tests carried out on hot test vehicles equipped with engines. Usually, a simple and special test device was developed for a specific model to realize the forc

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