Rocket engine thrust testing device

Abstract

The invention puts forward a rocket engine thrust testing device, which comprises a sensor fixing table, a sensor fixing plate, a force transmission shaft, a thrust plate, a guidance rod, a guidance frame, a movable frame, a fixed frame, a plate spring, an engine fixing plate and an engine fixing frame, wherein the sensor is fixed on the sensor fixing table on one end of the testing device; on theother hand of the testing device, the movable frame is fixed just above the fixed frame through the plate spring; the guidance rod performs a guidance function for the axial displacement of the movable frame; the displacement of the movable frame in other directions is restricted; the force transmission shaft is fixed just above the movable frame to guarantee that the force transmission shaft andthe sensor are coaxial and are free from stress contact; and before an experiment, a testing frame is integral and does not need to be assembled, after the experiment is finished, a supporting seat is installed, and the plate spring guarantees to be free from stress under a non-experiment state. An engine fixing frame and the movable frame adopt a detachable fixing way, different engines can be replaced according to experiment requirements, the device can be suitable for engines of different sizes by replacing the engine fixing frame, and the universality of the testing device is realized.

Description

technical field [0001] The invention belongs to the field of engine testing, and in particular relates to a rocket engine thrust testing device. Background technique [0002] The rocket engine testing technology is the core key technology in the engine development process. It runs through the entire engine experimental research process. The working process of the rocket engine is very complicated. It requires a combination of theoretical analysis and experiments to understand its comprehensive characteristics. Thrust is the main parameter to reflect the performance of a rocket engine. In order to accurately test the thrust of a rocket engine, it is necessary to study thrust testing technology. The ground experiment can provide the most intuitive data for the performance appraisal of the engine, and conclusions can be drawn through the analysis of the data, so as to accurately obtain the thrust of the rocket engine during the ground test. The performance of the test system d...

AI Technical Summary

Problems solved by technology

I understand that the current rocket engine thrust test mostly uses a separate test device. During the experiment, due to the tangential movement of the moving frame, the thrust eccentricity is likely to occur, resulting in inaccurate test results. In addition, the separate test device is used in each test. At present, it takes a lot of time to install the test frame. At the same time, most of the current test devices are model-specific, so they are highly targeted, resulting in limited application range, reducing the versatility of the experimental test system, and thus increasing the experimental cost.

For example, the thrust plate of the existing test device is used for the positioning of the engine, and the thrust plate is fixed at one end of the engine; while the solid-liquid engine is provided with an oxidant supply pipeline at one end, if the test device in the prior art is used, it will interfere and affect the test experiment , resulting in a test setup that is not universal

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