液体在静止状态下受力产生的压力称为液体静压力。作用在静止液体上的力有两种:质量力
和表面力。前者作用在液体的所有质点上,如重力;后者作用在液体的表面上,如切向力和法向
力。表面力可能是容器作用在液体上的外力,也可能是来自另一部分液体的内力。
如果在液体内部某点微小面积△A上作用有法向力△F,则△F/△A的极限定义为该点的静压
力,用p表示,即:
若在液体的面积A上受均匀分布的作用力F,则静压力可表示为:
在液压传动中所用的压力一般都是指液体的静压力。液体的静压力是由液体的自重和液体表
面受到的外力产生的。由于静止液体受压不受拉,受拉液体要流动,所以忽略切向力。则静止液
体在单位面积上所受的法向力称为静压力,简称为压力。液体静压力在物理学上称为压强,在工
程应用中习惯称为压力。
The pressure produced by the force exerted by a liquid in quiescent state is called liquid static pressure. There are two forces acting on stationary liquids: mass force.
And surface forces. The former acts on all the particles of a liquid, such as gravity; the latter acts on the surface of the liquid, such as tangential force and normal force.
Power. The surface force may be the external force of the container acting on the liquid, or the internal force from the other part of the liquid.
If there is a normal force Delta F acting on a tiny area Delta A in the liquid, the limit of delta F / delta A is defined as the static pressure at that point.
The force is expressed in P, that is:
If the force F is evenly distributed on the area A of the liquid, the static pressure can be expressed as:
The pressure used in hydraulic transmission generally refers to the static pressure of the liquid. The static pressure of a liquid is determined by the gravity and liquid surface of the liquid.
The external force produced by the surface. Because the static liquid is not pulled under tension and the liquid is flowing, the tangential force is ignored. Still liquid
The normal force acting on a unit area is called static pressure, or referred to as pressure. Liquid static pressure is called pressure in physics.
Application is called pressure.
