Hydraulic control refers to a control method that uses liquid power to change the working state of the manipulated object. It is a comprehensive application based on fluid mechanics and control theory, mainly using the transmission of pressure, in a closed hydraulic system, through the medium of liquid to transmit pressure, so that each hydraulic component produces force and motion.
The main elements of hydraulic control include hydraulic pumps, hydraulic valves, actuators and control elements. The hydraulic pump converts the fluid energy into pressure energy, and the hydraulic valve directs the liquid energy to the actuator to finally achieve the work task. According to whether the control system structure constitutes a closed loop, hydraulic control can be divided into open-loop control and closed-loop control (feedback control). According to the type of control element, it can be divided into hydraulic valve control and hydraulic pump control.
Hydraulic control system has a wide range of applications in various fields, such as aerospace aircraft flight control system, flight simulator, metallurgical field rolling mill downward pressure control system, steel belt deviation control system, weapons and equipment tank artillery stabilization system, self-propelled artillery driving booster system, robot humanoid robot, bionic robot animal, etc. In addition, hydraulic control systems are widely used in machine tools and metalworking equipment, construction machinery and engineering equipment, metallurgical and mining equipment, aerospace and military equipment, automobiles and vehicles, and other fields.
With the continuous development of artificial intelligence, machine learning and other technologies, the hydraulic parts and hydraulic parts industry will gradually realize intelligent production, improve the degree of automation of the production process, reduce manual intervention, reduce production costs, and improve the accuracy and consistency of products. At the same time, energy-saving and environmental protection technology and digital and network technology will also become an important development direction of the hydraulic parts and hydraulic parts industry, and promote the sustainable development and transformation and upgrading of the industry.
In hydraulic control, there are two main types of actuators commonly used: hydraulic cylinders and hydraulic motors.
Hydraulic cylinder: Hydraulic cylinder is one of the most common actuators in hydraulic systems, consisting of a cylinder block, piston, piston rod and seal, etc. The hydraulic cylinder converts the hydraulic energy into mechanical energy through the pressure of the hydraulic oil to achieve linear motion. There are many types of hydraulic cylinders, such as piston hydraulic cylinders, plunger hydraulic cylinders, oscillating hydraulic cylinders, and combination hydraulic cylinders, etc.
Hydraulic motor: A hydraulic motor is an actuator that converts hydraulic energy into rotating mechanical energy, similar to a hydraulic cylinder, and consists of a motor shell, rotor, seal, etc. The hydraulic motor drives the rotor to rotate through the pressure of the hydraulic oil, so as to realize the rotary motion of the mechanical equipment. There are also various types of hydraulic motors, such as gear hydraulic motors, vane hydraulic motors, plunger hydraulic motors, etc.
force controlling hydraulic device
electro proportional controls