液压传动的工作原理及组成（Working principle and composition of hydraulic drive）.docVIP

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液压传动的工作原理及组成（Working principle and composition of hydraulic drive）.doc

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液压传动的工作原理及组成（Working principle and composition of hydraulic drive）

液压传动的工作原理及组成（Working principle and composition of hydraulic drive） I. the working principle and composition of hydraulic transmission The working principle of hydraulic transmission can be explained by the working principle of a hydraulic jack Fig. 1: working diagram of hydraulic jack 1 - lever handle 2 - small cylinder 3 - small piston 4, 7 - one-way valve 5 - oil suction pipe 6, 10 - pipe 8 - big piston 9 - large cylinder 11 - stop valve 12 - fuel tank Fig. 1 is the working diagram of the hydraulic jack. The big cylinder 9 and the big piston 8 form a lifting hydraulic cylinder. The lever handle 1, the small oil cylinder 2, the small piston 3, and the one-way valves 4 and 7 comprise a manual hydraulic pump. Such as lift handle to make small piston moves upward, the lower end of the piston oil chamber of small volume increases, the formation of local vacuum, then the one-way valve 4 is opened, 5 from 12 oil tank through the oil suction pipe; press the handle, small downward movement of the piston, a small piston cavity high pressure one-way valve 4 is closed, the one-way valve 7 is opened, the inferior vena cava the oil pipeline 6 input lifting cylinder 9 chamber, forcing the piston to move up 8, lifting the top. Again, when the handle suction oil, one-way valve 7 automatically closed, so that the oil can not flow back, thereby ensuring that the weight does not fall on its own. Constantly reciprocating handle, you can continue to oil hydraulic pressure into the lift cylinder, the lower chamber, so that the weight gradually rise. If the shutoff valve 11 is opened, the oil in the lower chamber of the lifting cylinder flows back to the tank through the pipe 10 and the stop valve 11, and the heavy object moves downward. This is how the hydraulic jack works. Basic working principle: Hydraulic transmission is to use the pressure of the oil as the transmission of power medium, and the transmission must pass two energy conversion Thus, hydraulic transmission is a different