Hydraulics, from the Greek hydor = water and = Aulos’s concerns, is a generic term for the components of a hydraulic system, commonly termed hydraulic system. Hydraulic systems are grouped in fluid power systems group (both liquid and gas) which works with hydraulic fluid and pneumatic systems are working with gas. A hydraulic system is a design intended to rely on one stream of pressurized fluid transfer, and in most cases control the energy from a power source in the form of an electric motor or internal combustion engine, the hydraulic motors and / or hydraulic cylinders.Hydraulic pumps, motors, controllers, valves and accumulatorer can thus be controlled in a number of different ways to achieve a machine for all types of very high efficiency and precision of energy transfer, unlike mechanical transmissions which have strong limitations in controllability. A distinction between hydraulic system also called hydrostatic systems and hydrodynamic systems. The energy imparted in a hydraulic system defined by the fluid pressure (N / m) multiplied by the volume flow (cubic meters / second). Hydraulic efficiency (ηtotal) is defined as “based on power (Watts) divided by input power and is the conventional hydraulic system in the area max.0.90 to 0.75. Most types of hydraulic systems for the continuous transmission of hydraulic requires some sort of cooler for the liquid will not be overheated (temperatures above about 80-90 ° C).
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