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Fluid Mechanics
Hydraulic Force Transfer with Pascal's Law
Description
Hydraulic force transfer uses Pascal's law to move pressure through an enclosed fluid. Pascal showed experimentally that a change in pressure applied to a confined fluid is transmitted undiminished throughout the fluid and to the walls of its container. That idea is the basis of hydraulics, a major part of modern mechanical ...
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Transcript
液压系统(如液压千斤顶)基于帕斯卡定律。
它由一根U形管构成,其两臂横截面积不相等。活塞A安装在较细的管臂上,而活塞B则安装在较粗的管臂上。
将管道中充满液体,使两列中的液面高度相同。当对活塞 A 施加一个力时,它会对液体施加压力 p1。
根据帕斯卡定律,该压力通过流体传递到活塞 B,导致活塞 B 向外推出。
活塞B所受的压力p2等于p1。现在,利用压力与力之间的关系,可在系统摩擦力可忽略不计的条件下,得到液压系统中力的表达式。通过在较小面积上施加力,可在液压系统中增大输出力。
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