Called fluid drive, hydraulic and pneumatic transmission is proposed according to the 17th century PASCAL hydrostatic pressure transmission principle and developed a new technology, in 1795 the British Joseph Braman family (Joseph Braman, 1749-1814), in London with water as working medium, in the form of hydraulic press is applied to industry, gave birth to the world's first hydraulic press. In 1905, the working medium water was changed to oil, which was further improved.
Hydraulic transmission was widely used after world war I (1914-1918), especially after 1920. Hydraulic components began to enter the formal stage of industrial production in the late 19th and early 20th centuries. F.vickers invented the pressure-balanced vane pump in 1925, which laid the foundation for the progressive establishment of modern hydraulic components industry or hydraulic transmission. GoConstantimsco's theoretical and practical research on the transmission of energy fluctuations in the early 20th century; In 1910, the contribution to hydraulic transmission (hydraulic coupling, hydraulic torque converter, etc.), so that these two areas have been developed.
During world war ii (1941-1945), hydraulic drives were used in 30 percent of machine tools in the United States. It should be pointed out that the development of hydraulic transmission in Japan is more than 20 years later than that in Europe and America. Around 1955, the rapid development of hydraulic transmission in Japan, the establishment of the "hydraulic industry" in 1956. In the past 20~30 years, Japanese hydraulic transmission has developed rapidly, ranking the world's leading position.
Hydraulic transmission has many outstanding advantages, so it is widely used, such as general industrial plastic processing machinery, pressure machinery, machine tools, etc. Walking machinery, construction machinery, agricultural machinery, automobile, etc. Metallurgical machinery, lifting devices and roll adjusting devices used in iron and steel industry; Flood gates and levee devices, riverbed lifting devices and bridge operating mechanisms used in civil and water conservancy projects; Power plant turbine speed regulation device, nuclear power plant, and so on; Deck lifting machinery (winch), bow door, bulkhead valve, stern propeller, etc. Used by ships; Special technology for the use of giant antenna control device, measuring buoys, lifting rotating stage, etc. Artillery control device, ship anti-rolling device, aircraft simulation, aircraft landing gear and rudder control device, etc.
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