Flow weighing device

Abstract

The invention aims at providing a flow weighing device. The flow weighing device comprises a packaging device, a booster pipe, a weight unit, a weighing sensor and a supply pipe, wherein the weighingdevice and the weighing sensor are arranged inside the packaging device; the weighing device is arranged on the weighing sensor, and the weighing sensor is fixed onto the inner wall of the packaging device; the booster pipe is arranged above the weighing unit for distributing boosting gas into the packaging device and the weight unit; the first end of the supply pipe is fixed at the top of the packaging device, and the second end of the supply pipe is inserted into the weighing unit. The flow weighing device avoids the factors such as insurmountable external constraining force led by mechanical connection between the supply pipe and the weighing unit as well as dynamic influence produced by liquid medium outflow, thereby improving the flow weighing and measurement accuracy and achieving high-precision measurement.

Description

technical field [0001] The present application relates to the field of fluid mechanics, in particular to a flow weighing device. Background technique [0002] With the rapid development of aerospace technology, a new type of strategic liquid rocket attitude control engine ground thermal test flow weighing measurement device, for the tiny flow rate of attitude control liquid rocket engine propellant as small as a few grams per second, the measurement accuracy will directly affect the rocket engine. The thrust ultimately affects the precise trajectory of the rocket flying in space and the strike accuracy of the missile. It cannot accurately reflect the inherent mass of the engine, causing attitude adjustment failure or deviation from the planned flight trajectory. Therefore, the development of the liquid rocket attitude control engine puts forward strict requirements of "high precision and accuracy". At present, the existing weighing and measuring device directly mechanically...

AI Technical Summary

Problems solved by technology

[0003] The purpose of this application is to provide a flow weighing device to solve the insurmountable external constraints caused by the connection of the pressurized pipeline of the weighing vessel and the connection of the propellant outlet pipeline, as well as the pressure flow of the pressurized gas and the propellant Many factors such as the dynamic influence generated by the outflow cause the problem of inaccurate weighing measurement accuracy

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