The Research Of Static And Dynamiccharacteristics Of Double Buffering Load Sensor Large-flow Amplification Hydraulic Steering System

As a power steering with greater power output, hydraulic steering gear is widely used in large engineering machinery. The traditional steering gear which relies on increasing internal through-flow area to improve the displacement has oversize volume and is inconvenient to setted up,TLF with the function of amplifing flow still exists the problem of the vibrational of surge diverter, and its magnifying factor of flow is not big. Double buffering load sensor large-flow amplification hydraulic steering gear is a new type of hydraulic steering gear designed to solve above problems. The steering system is component of this steering gear, it has advantages of big displacement, high power and stable steering. Therefore, the simulational analysis and research of static and dynamic performance of this steering system has the extremely vital significance to the improvement of steering gear's design and the working performance of the steering system.At present,the more effective,economical and practical method used to study the static and dynamic properties of the hydraulic steering system is appling relevant computer software to simulational analysis. The simulation analysis of the static and dynamic characteristics of hydraulic steering system can effectively shorten design cycle and avoid repeatedly tests and processings to reduce the cost. At the same time, in the design stage,it can timely and accurately predict the static and dynamic performance of steering system to save time of the debugging of steering system,and it also through the simulation analysis to understand more in-depth every performance of steering system designed.This paper firstly analyzes the working principle of bidirectional buffer load sensor large-flow amplification hydraulic steering system and the system's components. The static and dynamic mathematical model of hydraulic steering system are established by using flowing continuous equation and power equilibrium equation through which the system of the static characteristics were analyzed. Based on the dynamic mathematical model of hydraulic steering system, according to this system's working principle, the simulation model is established of every component and the simulation model of whole steering system is founded based on the relationship of every part by using MSC.EASY5 which simulation soft has the professional hydraulic characteristics. When step signal inputted, the simulation analyses dynamic characteristics of bi-directional load sensor large-flow buffer amplifier hydraulic steering system. The results of simulation show that this system can realize the function enlarging 4 times flow and have good performance of double buffering and stable veering. The results of simulations have very important instruction meaning and reference value to further upgrade and optimization design.