Mobile micro-friction solid rocket engine thrust measurement system and installation method thereof

Abstract

The invention relates to a mobile micro-friction solid rocket engine thrust measurement system and an installation method thereof. The measurement system is composed of a fixed frame, a movable frame,a supporting frame, an engine, a holding ring, a transition frame, a force measurement assembly, a force bearing pier and an ejector rod. The movable frame and the force bearing pier are both fixed to the fixed frame through bolts, the supporting frame is fixed to the movable frame through bolts, and the holding ring is connected to the supporting frame. An ejector rod is fixed at the front end of the force bearing pier through a bolt, and the force measuring assembly is connected at the rear end of the force bearing pier; and the rear end of the force measuring assembly is connected with thetransition frame which is fixedly connected with an engine front skirt through bolts. According to the overall structure of the device, an in-situ calibration device is omitted, and compared with a traditional fixed plate spring connecting structure, the structure is simpler, and the precision is higher.

Description

technical field [0001] The invention relates to a mobile micro-friction solid rocket motor thrust measurement system and an installation method thereof, belonging to the technical field of solid rocket motors. Background technique [0002] The solid rocket motor ground test is an irreversible, high-cost, high-risk test. The working time of the engine is short, the amount of information to be obtained is large, and the process control and key parameters require high precision. The solid rocket motor thrust test is the most important link in the ground test. In the thrust test, the test frame is the key equipment for the thrust test, which has a great impact on the test accuracy of the engine thrust, transient thrust and negative thrust. The reason is that During the test, the test frame must bear the pressure of the engine and all its accessories, and maintain a certain attitude for the engine to fix the position to ensure that the axis of the engine is aligned with the forc...

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Problems solved by technology

[0004]1. The friction force of the leaf spring is a variable value, which generally changes with the change of the engine mass, which affects the test accuracy;

[0005]2. During the test, the leaf spring is in an unstable state, which affects the test accuracy;

[0006]3. The lateral stiffness of the leaf spring is relatively weak, and distortion and deformation occur, which affects the test accuracy;

[0007]4. Generally, four leaf springs are used for connection, but the damping of each leaf spring is in all directions;

[0008]5. Generally, the test frame connected by leaf spring needs to be equipped with in-situ calibration device

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