Drainage engine kerosene servo mechanism ground test method

Abstract

The invention discloses a drainage engine kerosene servo mechanism ground test method, and belongs to the technical field of a servo mechanism. The drainage engine kerosene servo mechanism ground test method comprises the steps of firstly adopting aviation hydraulic oil to replace kerosene, and performing a dynamic test on a servo mechanism hydraulic motor; then performing kerosene replacement on the servo mechanism hydraulic motor; and finally, performing air tightness detection by respectively adopting positive pressure detection and negative pressure detection. According to the invention, a ground hydraulic energy source is adopted to replace an engine kerosene source, a ground dynamic test is performed on the hydraulic motor, the principle is simple, the reliability is high, and the test process is safer for an operator at the same time; air tightness checking is performed on a drainage connecting loop by adopting a positive pressure mode and a negative pressure mode respectively, positive and negative pressure sealing capacities of the hydraulic motor in external sealing is fully considered, and a guarantee is provided for reliable work of the servo mechanism in an all-rocket system.

Description

technical field [0001] The invention relates to a ground test method for a kerosene servo mechanism of a drainage engine, and belongs to the technical field of servo mechanisms. Background technique [0002] The servo mechanism is the actuator of rocket thrust vector control, and it is a typical representative of integrated design, which integrates hydraulic pipelines, hydraulic components, power energy, and measurement and control plugs. The power energy includes hydraulic motor, axial plunger pump, etc. When the servo mechanism is working on the rocket, the fluoroplastic hose is connected to the engine drainage interface to drain the high-pressure kerosene of the liquid rocket engine, driving the hydraulic motor to rotate at a high speed, and the power is transmitted through the rotor Provide high-pressure oil to the axial piston pump and the actuator of the servo mechanism, and return the kerosene to the engine system through the low-pressure hose after the work is done. ...

AI Technical Summary

Problems solved by technology

At this stage, there are very few servo mechanisms powered by hydraulic motors at home and abroad, so there is a lack of reference for corresponding testing methods

In addition, the safety of the kerosene medium is low. In addition, the kerosene medium has high requirements for the design and manufacture of the energy platform. Once a dangerous source appears during the test, safety accidents such as explosions are very likely to occur.

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