UC知道液压系统英文翻译
来源：百度知道 编辑：UC知道 时间：2024/06/06 14:20:08
An inherent disadvantage of simple restrictors is that the flow through them is strictly
dependent on pressure drop across the valve and thus through flow will vary with changes in
load. As a consequence their application is virtually limited to those systems where the load
is constant, or where variation in flow rate, and thus operating speeds, are permissible.
To overcome this limitation, a combination of two restrictors can be used, one fixed and
the other automatically variable, so as to provide a constant pressure drop across the orifice,
and thus constant flow characteristics. The two elements are normally combined in a single
unit to produce a pressure-compensated flow restrictor. A further refinement may be feedback
of pressure from downstream to provide ’meter-in’ control, when the variable throttle acts
as a sensing orifice. Oneway working can be provided by incorporating a non-return valve in
the unit to provide free flow in
dependent on pressure drop across the valve and thus through flow will vary with changes in
load. As a consequence their application is virtually limited to those systems where the load
is constant, or where variation in flow rate, and thus operating speeds, are permissible.
To overcome this limitation, a combination of two restrictors can be used, one fixed and
the other automatically variable, so as to provide a constant pressure drop across the orifice,
and thus constant flow characteristics. The two elements are normally combined in a single
unit to produce a pressure-compensated flow restrictor. A further refinement may be feedback
of pressure from downstream to provide ’meter-in’ control, when the variable throttle acts
as a sensing orifice. Oneway working can be provided by incorporating a non-return valve in
the unit to provide free flow in
一个固有的缺点是,简单的节气门减慢藉着他们严格
依赖于通过阀门的压降,因此通过流量变化,会有所不同
负荷。由于他们的应用程序是有限的,事实上这些系统的负载
哪里是不变的,或者在流量变化,从而运转速度,是允许的。
要克服这个局限性,结合两种节气门减慢可用,一个固定的和
另一个自动变量,以提供一个恒定的压力降穿过孔,
因而恒流特性。这两个因素通常会合并成一个单一的
单位生产pressure-compensated流动的节流棒。进一步细化可以反馈
从下游压力提供的meter-in的控制,当变量油门的行为
作为传感口。Oneway工作,可以提供包含逆止阀
这个单位提供免费的一个方向流动。
pressure-compensated的主要限制是,尽管不断流动的节流棒
流量特性,独立的负荷控制流和节流
过剩流动必须直接通过另一个阀门、泵的工作,导致
设置。要克服这种损失的效率,pressure-compensated旁路
调解阀可以用。这里的超流穿过阀旁路工作
压力,同时控制流不受损失,标志节流。
使用一种pressure-compensated旁路调节器,因此,使得高得多的电路
要实现的效率。它的主要限制是,与pressure-compensated
节流棒,它不能用在平行的配置。它也不适合不变
压力系统,因为它会绕过了不必要的大体积的流体,导致
操作效率低下。
这个区别这两种类型的工作中可以看出,在这里Fig.1.30 1.31
在形式的双向三方阀门respectly,每一种都有一个固定的节流棒插进来
出口。在私有单位实际的几何appeciably可能有所不同,但弹簧
芯或活塞类型通常使用。
给的分太少了!