Hydraulic drive appts. for high pressure water pump - uses hydraulic drive between drive motor and pump with outlet pressure control acting on hydraulic system

摘要

The hydraulic drive appts. comprises a hydraulic drive system (5) connected between a main driving motor (4) and a high pressure water pump (2). An outlet pressure control device (6) includes a pressure detecting element and is connected to the hydraulic system, for varying the flow of the hydraulic transmission in order to control the output pressure of the pump (2). The hydraulic flow is controlled by varying the system capacity using a servo-mechanism, having three chambers disposed in series and separated by two sets of pistons and springs placed in opposition. ADVANTAGE - Provides improved control of high pressure water pump.