Hydraulic technology is one of the key technologies for achieving modern transmission and control, and countries around the world attach great importance to the development of the hydraulic industry. The total sales of hydraulic components worldwide are 35 billion US dollars. According to statistics, the sales revenue of hydraulic industry in major countries around the world accounts for 2% to 3.5% of the output value of mechanical industry, while China only accounts for about 1%. This fully indicates that the utilization rate of hydraulic technology in China is relatively low. Efforts to expand its application fields will have broad development prospects.
In the mid-20th century, China officially began its hydraulic industry, and currently its hydraulic technology is in a period of rapid development and improvement. In the early stages of development, the products only covered areas such as machine tools and forging that required high-power machinery, but later developed into engineering machinery. Since 1965, we have purchased some hydraulic components and production technology from abroad, and at the same time, we have designed our own hydraulic products. From then on, our country's hydraulic component production has developed our own series from low pressure to high pressure, and has been widely used in various mechanical products. Afterwards, technological exchange for excellent foreign products was accelerated, and localized design was carried out in combination with foreign products to ensure that China's hydraulic technology can actively catch up with the world average level and enhance the overall industrialization process of China. With the rapid development of industrialization in the future, China has successively built research institutions, promoted institutional construction, and promoted market optimization and upgrading. Under the promotion of the system, market enterprises are not only able to produce hydraulic components such as pumps, valves, and motors, but also have innovatively designed many new hydraulic components, such as logic directional valves and electro-hydraulic proportional valves. Nowadays, there is a complete series of hydraulic components produced in China. The development of hydraulic technology is moving towards high quality, high performance, and high efficiency.
After entering the 21st century, due to the widespread application of computers, the development of hydraulic technology has been greatly promoted. The application of computer assisted hydraulic system design, computer simulation and optimization, microcontroller control and other tasks have achieved good innovative results. At present, hydraulic technology has made significant progress in high pressure, high power, high efficiency, low pollution, and low energy consumption, and has achieved new development achievements in digital control, proportional control, and other technologies. In addition, there are increasingly good results in computer simulation optimization of hydraulic systems and microcontroller control. The hydraulic industry in China has the characteristics of complete categories, excellent production capacity, and high technical level. At present, the national hydraulic industry has been able to provide a full range of products for agriculture, machine tools, ironmaking, petroleum, chemical industry, railways, ships, engineering machinery, agricultural machinery, etc. At present, there are over 1000 varieties and specifications of hydraulic component products. Moreover, China's hydraulic industry attaches great importance to technical exchange, cooperation, and economic cooperation with foreign enterprises. In recent years, various components and hydraulic systems quoted from foreign countries have played a very important role in improving the technical level of China's products.
