Ship Crane Hydraulic Power Systems

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=aZ4jCkk5wCk

Hydraulic systems transmit and control energy of power through the use of moving and pressurized fluids. When man first learned how to exploit water power to turn millstones and power pumps, he had taken the first step towards industrialization. • Nowadays, the use of hydraulic as a power medium is widespread throughout many different industries. In fact, usage has expanded to such an extent. Today, very few industries would be able to survive without hydraulics. • Many of us drive cars, and, each time we break, we make use of the vehicle’s hydraulic system. • Ship’s cranes have hydraulic system and in this training film it is represented very clearly. • ________________________________________ • Timeline: • 00:00 Hydraulic Power Systems • 00:50 Hydraulic System in Car Brakes • 02:30 Hydraulic Pressure • 06:44 Throttle Valve • 09:03 Pressure Limiting Valve • 10:14 Parallel Connection • 10:55 Series Connection • 12:32 Hydraulic Flows • 14:41 Composition of a Simple Hydraulic System • 17:37 Hydraulic Power • 18:36 Deck Crane Hydraulic Power • 19:30 Hydrodynamic Losses and Mechanical Losses • 20:19 Efficiency and Energy Loss • 22:08 Basic Principles of Hydraulic System. Closed Circuits. Hydraulic Deck Cranes • 28:55 Overloaded Circuit and Relief Valve • 29:50 Cooling. Hydraulic Cooler • 31:34 Unit Valve • 33:15 System Unloading. Motor Valve • 34:10 Shock Absorber Valve • 35:04 Two-Speed Plug • 35:36 Pilot Pressure • 36:17 Three Closed Circuits in Complete Crane Hydraulic System (Hoisting, Luffing, Slewing) • 37:00 Hydraulic Diagram of Deck Crane • ________________________________________ • Key thoughts • 1. Unloaded pump do not provide pressure, they merely supply a volume flow, usually stated in liters per minute. • 2. A modern hydraulic pump is capable of supplying a more or less constant volume flow, independent of the pressure. Pressure is generated through loading.

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