1、中文中文 3357 字字 Fluid Power Pumps Purpose of pumps Every fluidpower system uses one or more pumps to pressurize the hydraulic fluid. The fluid under pressure, in turn, performs work in the output section of the fluid-power system. Thus, the pressurized fluid may be used to move a piston in a cylinder o
2、r to turn the shaft of a hydraulic motor. The purpose of a pump in a fluid-power system is to pressurize the fluid so that work may be performed. Some fluid-power systems use low ressures-100psi or less-to do work. Where a large work output is required, high pressures-1000pse or more-may be used. So
3、 we find that every modern fluid-power system uses at least one pimp to pressurize the fluid. Types of Pumps There types of pumps find use in fluid-power systems ： (1)rotary, (2)reciprocating, and(3)centrifugal pumps. Simple hydraulic systems may use but one type of pump. The trend is to use pumps w
4、ith the most satisfactory characteristics for the specific tasks involvedIn matching the characteristics of the pump to the requirements of the hydraulic system, it is not unusual to find two types of pumps in series. For example, a centrifugal pump may be used to supercharge a reciprocating pump, or a rotary pump may be used to supply pressurized oil for the controls associated with a reversing variable-displacement reciprocating pump Rotary Pumps These are built in many different designs an
