Showing posts with label mechanical transmission. Show all posts
Showing posts with label mechanical transmission. Show all posts

Tuesday, 1 October 2013

Gears The Purpose




Gears are generally used for one of four different reasons:
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To reverse the direction of rotation
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To increase or decrease the speed of rotation
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To increase or decrease the speed of rotation
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To move rotational motion to a different axis
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Gears

Mechanical Engineering

Thursday, 26 September 2013

External Gear Pump

External gear pumps are similar in pumping action to internal gear pumps in that two gears come into and out of mesh to produce flow.  However, the external gear pump uses two identical gears rotating against each other -- one gear is driven by a motor and it in turn drives the other gear.  Each gear is supported by a shaft with bearings on both sides of the gear.
1.  As the gears come out of mesh, they create expanding volume on the inlet side of the pump. Liquid flows into the cavity and is trapped by the gear teeth as they rotate.
2.  Liquid travels around the interior of the casing in the pockets between the teeth and the casing -- it does not pass between the gears. 
3.  Finally, the meshing of the gears forces liquid through the outlet port under pressure.
Because the gears are supported on both sides, external gear pumps are quiet-running and are routinely used for high-pressure applications such as hydraulic applications. With no overhung bearing




Other Topics

Wednesday, 25 September 2013

Method of ignition

SI engines, mixture is uniform (conventional engines), mixture is non-uniform (stratified-charge engines) ignition is by the application of external energy (to spark plug)

CI engines, ignition by compression in conventional engine (Diesel engine), pilot injection of fuel in gas engines (eg, natural gas and diesel fuel – dual fuel engines)



Other Topics

AIR STANDARD CYCLES

AIR STANDARD CYCLES
Because the products of combustion are not too different from air (in terms of thermodynamic properties) we can analyse the engine cycle as a series of reversible non-flow processes using air as the working fluid throughout the cycle.This is known as an air-standard cycle.



Other Topics

IC engine

Physics basic inventions and inventors

1.Which instrument is used to measure altitudes in aircraft's ? Audiometer Ammeter Altimeter Anemometer Explanation : ...