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The Hydraulic Power Pack

The Hydraulic Power Pack. The hydraulic power pack combines the pump, the motor, pressure relief valve and the tank. The hydraulic power pack unit provides the energy required for the hydraulic system. Hydraulic Symbols.

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The Hydraulic Power Pack

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  1. The Hydraulic Power Pack • The hydraulic power pack combines the pump, the motor, pressure relief valve and the tank. • The hydraulic power pack unit provides the energy required for the hydraulic system.

  2. Hydraulic Symbols • The symbols don’t show the component construction, or size, however, it is a standard form that is used by all engineers to represent that specific component. Electric Motor Hydraulic Pump Tank or Reservoir Pressure Relief Valve Simplified Hydraulic Power Pack Detailed Hydraulic Power Pack

  3. Fundamental Laws of Hydraulics

  4. Pressure • When a force (F) is applied on an area (A) of an enclosed liquid, a pressure (P) is produced. • Pressure is the distribution of a given force over a certain area. • Pressure can be quoted in bar, pounds per square inch (PSI) or Pascal (Pa) • P = F • A • ` 1 Pascal (Pa) = 1 N/m2. 1 bar= 100,000 Pa= 105Pa 1 bar= 0.1 Mpa (mega Pascals) Force (N) Pressure (N/m2 ) Area (m2)

  5. Class Activity 1: • A cylinder is supplied with 200 bar pressure; its effective piston surface is equal to 800 mm2. Find the maximum force which can be attained. P= 200 bar = 200X100000 N/m2 = 20000000 N/m2 A= 800/1000=0.8 m2. F= P.A= 20000000 X 0.0008= 16,000,000N = 16,000 kN

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