Hydraulic drive technology


Hydraulic drive technology is a technology that uses the pressure energy of a liquid to transfer energy to achieve mechanical movement and power output. It is based on the incompressibility of the liquid and the characteristics of pressure transmission, and realizes the transmission of power and power through the cooperation of hydraulic energy, actuators and control elements.


Hydraulic drive technology has many advantages, such as small size, light weight, low inertia force and impact force generated, large driving force or driving torque, high power density ratio, hydraulic cylinder can be integrated into the mechanical structure, compact structure, Good stiffness; hydraulic drive speed regulation is relatively simple, can achieve stepless speed regulation in a wide range; the working medium is hydraulic oil, self-lubrication between hydraulic cylinder and piston, small wear and long service life; the system runs smoothly, the natural frequency of hydraulic system is high, and the commutation and speed regulation can be well realized; overload protection is easy to achieve.


The core components in hydraulic drive technology mainly include the following parts:

Hydraulic pump: The hydraulic pump is the power element of the hydraulic system, which converts the mechanical energy of the prime mover (such as an electric motor or internal combustion engine) into the pressure energy of the liquid, thus providing a power source for the entire hydraulic system. There are various types of hydraulic pumps, including gear pumps, vane pumps, piston pumps, etc., and different types of pumps are suitable for different working conditions and needs.

Hydraulic motor: A hydraulic motor is a device that converts the pressure energy of a liquid into mechanical energy, usually rotational motion. In hydraulic systems, hydraulic motors are usually used as actuators to drive loads for rotational motion.

Hydraulic cylinder: A hydraulic cylinder is a device that converts the pressure energy of a liquid into mechanical energy in a straight line reciprocating motion. It is one of the common actuators in hydraulic systems and is widely used in various mechanical equipment that requires linear motion.

Control Element: A control element is an element used in a hydraulic system to control and regulate the direction, pressure, and flow of liquids. Common control components include various hydraulic valves (such as directional control valves, pressure control valves, and flow control valves), as well as electro-hydraulic proportional control valves, electro-hydraulic servo valves, etc. These elements enable precise control of the hydraulic system by adjusting the direction and flow of the fluid.

Auxiliary components: auxiliary components include oil tanks, filters, oil pipes, joints, seals, etc., although they do not directly participate in the conversion and control of hydraulic energy, but play an important role in ensuring the normal operation of the hydraulic system and prolonging the service life.


How does a hydraulic drive work

What is  hydraulic drive technology


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