Showing posts with label Enthalpy. Show all posts
Showing posts with label Enthalpy. Show all posts

Friday 4 October 2013

Worm Gears

Helical Gears

 The teeth on helical gears are cut at an angle to the face of the gear. When two teeth on a helical gear system engage, the contact starts at one end of the tooth and gradually spreads as the gears rotate, until the two teeth are in full engagement.

This gradual engagement makes helical gears operate much more smoothly and quietly than spur gears. For this reason, helical gears are used in almost all car transmissions.

Because of the angle of the teeth on helical gears, they create a thrust load on the gear when they mesh. Devices that use helical gears have bearings that can support this thrust load.

One interesting thing about helical gears is that if the angles of the gear teeth are correct, they can be mounted on perpendicular shafts, adjusting the rotation angle by 90 degrees.





Other Topics

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 14 June 2012

PHOTOSHOP


 File.pdf     

Physics basic inventions and inventors

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