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在液压传动中,传递能量的介质是液压油(包括乳化液、磷酸脂和水等)。介质的性质对系统的工作影响极大。因此,必需了解其特性并进行适当的选择。一、油的粘度当液体流动时,液体各部分之间产生内摩擦力或切应力,这种性质称粘性。表示粘性大小的量称为粘性系数或粘度。从图12-1可以看出,当平板A相对于平板B以V_0速度运动时,其间油液速度场分布规律为一曲线。相对板B而言,贴在A板上的油液速度为V_0,而贴在B板上的油液速度为零,
In hydraulic transmission, the energy transfer medium is hydraulic oil (including emulsion, phosphate and water, etc.). The nature of the media has a huge impact on the system’s work. Therefore, it is necessary to understand its characteristics and make the appropriate choice. First, the viscosity of oil When the liquid flow, the liquid friction between the various parts or shear stress, this property is called sticky. The amount that indicates the viscosity is called the viscosity coefficient or viscosity. As can be seen from Figure 12-1, when plate A is moving at V_0 relative to plate B, the field velocity distribution is a curve. Relative to the B plate, affixed to the A plate oil velocity V_0, while the affixed to the B plate oil velocity is zero,