Hydraulic - Mechanical Power Terminology

Hydraulic pressure is a term used in the mechanical and electromechanical industries. Hydraulic pressure can be transmitted through power transmission, becoming hydraulic transmission. Hydraulic pressure can also be used as a control method, known as hydraulic control.

Hydraulic transmission uses liquid as the working medium and utilizes the pressure energy of the liquid to transmit power.

Hydraulic control is a control method that uses pressurized liquid as the transmission of control signals. The control system composed of hydraulic technology is called a hydraulic control system. Hydraulic control usually includes hydraulic open loop control and hydraulic closed-loop control. Hydraulic closed-loop control, also known as hydraulic servo control, constitutes a hydraulic servo system, typically including electrical hydraulic servo systems (electro-hydraulic servo systems) and mechanical hydraulic servo systems (hydraulic servo systems, or hydraulic servo mechanisms).

A complete hydraulic system consists of five parts, namely energy device, actuator, control and adjustment device, auxiliary device, and liquid medium. Hydraulic pressure is widely used in industrial and civil industries due to its characteristics of large power transmission, easy transmission and configuration. The function of the executing components of the hydraulic system (hydraulic cylinder and hydraulic motor) is to convert the pressure energy of the liquid into mechanical energy, thereby obtaining the required linear reciprocating or rotary motion. The function of the energy device (hydraulic pump) in the hydraulic system is to convert the mechanical energy of the prime mover into the pressure energy of the liquid.