Hydraulic Constant Pressure Supply
Typical arrangements of a constant pressure supply are shown in Figs 1. In its simplest form, shown in Fig. 1, the power unit consists of a fixed displacement pump, a pressure relief valve and a reservoir. As the pump delivers fluid at a constant rate. The supply pressure is determined by the setting of the pressure relief valve which diverts pump flow in excess of system demand back to tank. The energy dissipated through the relief valve is not recoverable and is converted into heat energy causing a rise of temperature of the fluid in the system. which can be counteracted to some extent by increasing the amount of fluid circulating in the system. although normally, other than for very low power levels. some form of cooling would have to be provided.
Fig 1. Fixed displacement pump with relief valve.
hydraulic constant pressure systemNo related posts.