Basic Hydraulic Circuit Design: Energy Conservation: Part 3

摘要

A special class of hydraulic systems has evolved to improve the efficiency of transmitting power from the prime mover to the load. They are load-sensing systems. There are two basic methods of sensing load: with pump controls and valve controls. Most commercial load-sensing systems use pump controls. The control signal sometimes consists of only a load-pressure signal, but often the load-pressure signal is combing with a flow signal. Load-sensing pump control systems resemble those used in pressure-compensated pumps with one significant difference - control pressure for pressure-compensated pumps is sensed inside the pump and reflects all system pressure variations.