Hydraulic transmission and pneumatic transmission, called fluid transmission, is a new technology developed according to the principle of liquid static pressure transmission put forward by PASCAL in the 17th century. It is a widely used technology in industrial and agricultural production. Nowadays, the level of fluid transmission technology has become an important symbol of a country's industrial development level.
The application of hydraulic transmission is very strong, such as loading and unloading stacking machine hydraulic system, as a kind of storage machinery, in the modern warehouse to use it to realize the loading and unloading of textile bags, oil drums, barrels and other goods mechanization work. Can also be used in the universal cylindrical grinder hydraulic system and other production practice. These systems are characterized by large power, high production efficiency and good stationarity.
As a widely used technology, hydraulic pressure has a broad prospect in the future. With the further development of the computer, hydraulic control system and intelligent control technology, computer control technology and other technologies, so that it can play a role in more occasions, but also can be more delicate, more flexible to complete the expected control task.
Hydraulic transmission has many outstanding advantages, so it is widely used, such as general work. Industrial plastic processing machinery, pressure machinery, machine tools, etc.; Construction machinery, construction machinery, agricultural machinery, automobile, etc.; Metallurgical machinery, lifting devices, roll adjusting devices for iron and steel industry, etc.; Flood gates and DAMS for civil and hydraulic engineering, riverbed lifting device, bridge control mechanism, etc.; Power plant turbine speed regulating device, nuclear power plant and other countries; Deck cranes (winches), bow doors, bulkhead valves, stern thrusters, etc.; Giant antenna control device for special technology, measuring buoy, lifting and rotating stage, etc.; Military industrial use of gun control device, ship roll damping device, aircraft simulation, aircraft landing gear retraction device and rudder control device.
The basic principle of hydraulic transmission is to use the oil under pressure as the working medium in a closed container to achieve energy conversion and power transmission. The liquid is called the working medium, generally for mineral oil, its role and mechanical transmission in the belt, chain and gear transmission components similar.
In hydraulic transmission, hydraulic cylinder is one of the most simple and relatively complete hydraulic transmission system, analysis of its working process, can clearly understand the basic principle of hydraulic transmission.
The composition of the required various control loops, and then a number of circuits organically combined to complete a certain control function of the transmission system to complete the transmission, conversion and control of energy
