TRANSIENTS IN MACHINERY HYDRAULICS

摘要

The mathematical model of a problem, including the specification of the hydrodrive topology, the description of liquid flows in pipes and of the equipment functioning in non-steady modes is given. Considered computational technique is used for computation of the working fluid supply system for test stand. The effect of such protective measures as safety valve and air dome is researched. The comparison the using of variable-capacity pump with fixed-capacity pump is fulfilled. The influence of the adjusted pressure and capacity of relief valve on intensity of transient is investigated. The dependencies illustrating the air volume value influence on pressure in system are presented. It is ascertain that the capacity of relief valve is the key parameter, which influences on the maximum pressure in the system. The mathematical models and computational methods provide a reliable toolkit for modeling of various regular and irregular situations in such complex structure as hydraulic drivers that enables elaborating the modes of its safe operation.