pascal’s principle: more practice. fluid systems: student success criteria i can describe common...
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Pascal’s Principle: More Practice
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Pascal’s Principle: More Practice
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Pascal’s Principle: More Practice
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Pascal’s Principle: More Practice
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Pascal’s Principle: More Practice
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Fluid Systems:Student Success CriteriaI can describe common components used in
hydraulic and pneumatic systems and explain their function.
I can draw simple hydraulic or pneumatic circuits.
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SPH4C
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Fluid Systems: DefinitionThe hydraulic press
is an example of a fluid system, an arrangement of components used to transmit and control forces in a fluid.
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Energy SourcesThe initial source of energy for the
system can be an electric motor or other device that drives a pump (for liquids) or a compressor (for gases).
The symbol for a compressor or a fixed-displacement single direction hydraulic pump (the arrow shows the direction of the fluid flow).
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Energy OutputThe pump or compressor transforms
mechanical energy to fluid energy, and then the actuator transforms the fluid energy back to mechanical energy.
The symbol for a single acting cylinder, the actuator for the hydraulic press you constructed.
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More Circuit SymbolsTransmission lines (through which the fluid
travels)
A continuous line is a fluid flow line
A dashed line is a pilot or drain
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More Circuit SymbolsA diamond is a fluid conditioner (filter,
separator, lubricator, heat exchanger)
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More Circuit SymbolsOne square indicates a pressure control
function Two or three adjacent squares indicate a
directional control
The most commonly used directional controls are valves.
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ValvesExample: 3 ports / 2 positionsA normally closed directional control valve with
3 ports and 2 finite positions looks like:
A normally open directional control valve with 3 ports and 2 finite positions looks like:
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Manual Controlsgeneral symbol (without showing the control type)
pushbutton
lever
foot pedal
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Example System: A Car Hoist
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Example System, by Parts
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Example System, by Parts
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Example System, by PartsNote that open triangles are uses to illustrate gases and solid triangles for liquids.
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Hoist being loweredWhen the hoist is lowered, the valve’s position
changes:
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More PracticeThe Hand-Powered Air Compressor:
An Introduction to Valves Lab ActivityRobotic Applications Assignment (ref. p. 258 –
260).