SCIENCE AND TECHNOLOGY ENGLIAH FOR MECHANICAL ENGINEERING From an operational standpoint, any hydraulic system can be divided into four accumulator 蓄能器 logical segments: The power input segment, the tube connector power transmission system, the control devices管接头 and the power output portion. The power input swivel joint gment usuall! consists of pumps and转节,旋转接头 accumulators. The power transmission system flexible hose th includes tubing, tubing connectors, swivel joints and flexible hose. Flow control valves, relief valve 溢流阀 pressure control val ves. And relief valves make oscillatory up the control elements. The power output摆动的,振荡的 portion usually consists of rotary and actuator oscillatory motor or linear actuators. Because al most all practical hydraulic systems can be 执行机构 divided into these same four basic segments they will be considered in detail laterSCIENCE AND TECHNOLOGY ENGLISH FOR MECHANICAL ENGINEERING From an operational standpoint, any hydraulic system can be divided into four logical segments: The power input segment, the power transmission system, the control devices and the power output portion. The power input segment usually consists of pumps and accumulators. The power transmission system includes tubing, tubing connectors, swivel joints and flexible hose. Flow control valves, pressure control valves. And relief valves make up the control elements. The power output portion usually consists of rotary and oscillatory motor or linear actuators. Because almost all practical hydraulic systems can be divided into these same four basic segments, they will be considered in detail later. accumulator 蓄能器 tube connector 管接头 swivel joint 转节，旋转接头 flexible hose 软管 relief valve 溢流阀 oscillatory 摆动的，振荡的 actuator 执行机构