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一、前言液压技术在30年代已在航空上得到普遍应用,只是在近几十年才在民用工业得到推广。由于液压技术具有许多优点,因此它发展得很快,例如我国生产液压元件厂66年仅20多个厂,年产8万余件,目前已发展到250多个元件生产厂,产量达到141万件。在我国农机行业液压技术应用还很落后,大部分只是“泵——阀——缸”所组或的一个简单提升系统(高度调节),这是远不能满足现代农机要求的。液压这门新技术最大特点是体积小,传递功率大。作为作功的液压元件,如果是作直线往复运动,习惯称之为油缸;
I. INTRODUCTION Hydraulic technology has been widely used in aviation in the 1930s, but it has only been popularized in civilian industries in recent decades. Because hydraulic technology has many advantages, it has developed rapidly. For example, China’s hydraulic components factory has only 20 factories in 66 years, with an annual output of more than 80,000 pieces. At present, it has grown to more than 250 component production plants, and the output reaches 1.41 million. Pieces. The application of hydraulic technology in China’s agricultural machinery industry is still lagging behind. Most of them are only a simple lifting system (height adjustment) of the “pump-valve-cylinder” or group, which is far from meeting the requirements of modern agricultural machinery. The biggest feature of this new technology of hydraulic pressure is its small size and large power transmission. As a hydraulic component for work, if it is a linear reciprocating motion, it is used as a cylinder;