power5 - DOUBLE ACTING ENGINE DOUBLE Double Acting Engine...

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Unformatted text preview: DOUBLE ACTING ENGINE DOUBLE Double Acting Engine Double Steam Steam Inlet Mechanism & Distribution Device Device Experiments by Other Inventors Principle of Double Acting Planet Gear & Parallel Motion Cutoff Valve & Governor Industrial Uses of Steam Summary - Development of Engine Steam Inlet Mechanism Steam Large Engine of Watt Used Condenser For Cost Reasons Steam Entered Steam-Jacket Entered and Evacuated at Bottom Exited Towards Condenser Condenser Connected to Suction Pump Inlet Mechanism - Single Acting Engine Engine Steam Distribution Device Steam Watt (1778) Steam Enters Cylinder at Bottom - Piston Rises Steam Evacuated To Condenser - Piston Lowers Newcomen (7 psi), Watt (10 psi) Watt (1780) Led to Double Acting - Reversed Operation Constant Steam Pressure Under Piston Alternating Pressure & Vacuum Above Piston Did Not Change Operating Principle Vacuum Was Still Driving Force Not Satisfactory - Led to Double Acting Steam Distribution - Watt (1778) Steam Steam Distribution - Watt (1780) Steam Experiments by Other Inventors Experiments Jacob Leopold (1724) Two Newcomen-Type Cylinders Four-Way Cock Steam Pressure Higher Than Atmospheric Jonathan Hull (1736) Paddle Wheel in Continuous Motion Ratchet Mechanism Opposite Direction With Counter Weight Experiments by Other Inventors (continued) Continuous Movement (competing with Watt) Keane Fitzgerald (1759) John Stewart (1777) Matthew Washborough (1779) James Pickard (1780) Thompson (1793) & Sherrats (1794) Double Acting - Two Alternating Cylinders E. Cartwright (1797) Closed Circuit Two Gears - Flywheel Atmospheric Engine - Leopold (1724) (1724) Atmospheric Engine - Hull (1736) Atmospheric Rotary Engine - Cartwright (1797) Rotary Planet Gear & Parallel Motion Planet Planet Gear - Watt (1781) Crankshaft & Connecting Rod Matthew Washborough (1779) James Pickard (1780) Epicyclic Gear Train Watt’s Sun and Planet Gear Parallel Motion - Watt (1784) Tried Rack & Pinion Chains Previously “O” is Center of Beam “A” is Fixed “B” & “C” are Attached to Piston Rods Planet Gear - Watt (1781) Planet Parallel Motion - Watt (1784) Parallel A Cutoff Valve Cutoff Previously Previously Steam Pressure Was Used Throughout The Stroke Throughout Watt (1769) Stop Supply Of Steam Before End Of Stoke Utilize Steam Expansion For Last Portion Of Utilize Stroke Stroke Absorbed Shock of Piston At End Of Stroke Total Power of Engine Decreased Economy Of Steam To Produce Same Work Patent - Watt (1782) Governor Governor Last Of Watt’s Great Inventions Speed Governor Limited Opening Of Valves Controlled Steam Flow Slowed Down Engine No No Patent - Used In A More Primitive Form In Grain Mills Form Governor With Fly-Balls (1784) Governor Industrial Uses of Steam Industrial Boulton & Watt (1773 - 1800) Soho Factory - Built 500 Engines 1/3 Were Pumping Engines 2/3 Were Double Acting Averaged 15 hp After 1800 Watt’s Patents Went Public Great Britain & Ireland (1817) 20,000 hp In Cotton Mills Glasgow (1825) 310 Steam Engines Double Acting Rotative Engine Boulton & Watt (1787 - 1800) Boulton Summary of Development Summary of Steam Engine Papin (1690) Savery (1698) Newcomen Watt - Condenser (1769) Watt - Double Acting (1784) Woolf - Double Expansion (1803) Papin (1690) Papin Savery (1698) Savery Newcomen Newcomen Watt (1769) Watt Watt (1784) Watt Woolf (1803) Woolf ...
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This note was uploaded on 11/22/2011 for the course EGN 2031 taught by Professor Staff during the Summer '08 term at University of South Florida.

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