DYNAMIC CHARACTERISTICS OF LOW-PRESSURE WATER HYDRAULIC SYSTEM

摘要

Low-pressure water hydraulics is an attractive technology having the low price of pneumatics, good controllability and stiffness of oil hydraulics as well as safety environment. This paper deals with the dynamic characteristics of the low-pressure water hydraulic system consisting of a vortex pump, a flexible tube with a length of 10 m, an electro-magnetic on-off valve and a single rod cylinder with some inertia loads. The step responses on the pressure and the piston displacement in the water hydraulic system under the operational conditions of a low pressure are obtained experimentally. The computer simulation of the system under the above conditions was done by using the simulation software of OHC-Sim developed by our research group. The efficiency in the system is also discussed on the basis of the system simulation.