Water hammer pressure sensor field calibrating device

Abstract

The invention relates to a water hammer pressure sensor field calibrating device comprising a water hammer pressure generating device, a standard sensor, and a data processing system for acquiring and processing data of a calibrated water hammer pressure sensor and the standard sensor. The water hammer pressure generating device comprises a propellant supplying system, a propellant supplying pipeline connected with the outlet of the propellant supplying system, a propellant valve disposed on the propellant supplying pipeline, a pressure regulating device for regulating pressure in the propellant supplying pipeline, and a flow regulating device for regulating propellant flow. The calibrated water hammer pressure sensor and the standard sensor are arranged on the propellant supplying pipeline behind the propellant valve and are used for measuring pressure in the propellant supplying pipeline. By establishing the water hammer pressure generating device, the water hammer pressure sensor field calibrating device really simulates a water hammer sensor operating environment in a test, eliminates system errors, and improves water hammer pressure measurement accuracy.

Description

technical field [0001] The invention relates to a liquid rocket engine test device, in particular to an on-site calibration device for a water hammer pressure sensor of a liquid rocket engine. Background technique [0002] The water hammer pressure parameter of a liquid rocket engine is the moment when the engine is ignited and shut down, the instantaneous opening and closing of the engine inlet valve causes a sudden change in the flow rate of the propellant, which causes a sharp increase and decrease in the medium pressure of the propellant supply pipeline, and the maximum exceeds the rated pressure. Ten times or even dozens of times the inlet pressure value. [0003] The water hammer pressure is related to the engine inlet pipeline, inlet valve, inlet pressure, etc., and the water hammer pressure test data is the main reference basis for the design reliability of the engine structure, main valve, test system inlet pipeline, and test frame structure. Excessive water hammer...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problem that the existing laboratory calibration cannot eliminate these system errors to the greatest extent, the present invention provides an on-site calibration device for water shock pressure sensors

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