Читать книгу Hydraulic Fluid Power - Andrea Vacca - Страница 84
4.5.1 Orifices in Pressure and Return Lines
ОглавлениеWhen an orifice is used in the working or the return line of a system, it can operate as metering or compensating element.
In principle, if an orifice establishes the flow rate, for a given pressure drop, it functions as a metering element; however, if the orifice defines a certain pressure drop for a given flow rate, it functions as a compensator. In both cases, the relation between pressure drop and flow rate across the orifice is given by Eq. (4.5).
This classification is important to understand several control strategies used in hydraulic systems, as it will be shown in Part II and Part III of the book. A significant example is now provided to clarify the distinction between these different behaviors of an orifice.
