Research on parameter selection method of gas-charged accumulator

Abstract

Volume and pre-charge gas pressure are the key parameters of the gas-charged accumulator, which are of great influence on its dynamic performance(the output performance of pressure and flow under working conditions). The calculation and selection of a certain type of aircraft rudder surface emergency gas accumulator is taken as an example, based on the hydraulic component library in the Hypneu simulation software, combined with the main design parameters of this type of aircraft hydraulic system and the working principle of the emergency accumulator, the simulation model of the actuation of the accumulator is established. The test points are set in Hypneu to record the simulation curve, and the influence of the key parameters of the gas-filled accumulator on its dynamic performance is explored by analyzing the simulation curve. The theoretical calculation and simulation analysis are combined to propose a set of accumulator parameter selection method, and the selection method is verified by experiments. The results show that the greater of the pre-charge gas pressure of the accumulator is, the smaller the effective volume output by the initial accumulator is, and the reduction of the pre-charge gas pressure can increase the effective volume, and reduce the output pressure of the accumulator at the same time. The experimental results are close to the simulation results, and the accumulator selected by this method can meet the actuation requirements.

Keywords

• aircraft
• hydraulic simulation
• pre-charge gas volume
• gas-charged accumulator
• emergency gascharged accumulator
• accumulator volume
• hypneu