Tuesday 10 December 2013

Bevel gears and its applications:

Bevel gears and its applications:-
Bevel gears are the gears where the axes of the two shafts
intersect and the tooth-bearing faces of the gears
themselves are conically shaped. Bevel gears are most often
mounted on shafts that are 90 degrees apart, but can be
designed to work at other angles as well. The pitch surface
of bevel gears is a cone.
Applications:
1)Bevel gears are used in differential drives, which can
transmit power to two axles spinning at different speeds,
such as those on a cornering automobile.
2)Bevel gears are used as the main mechanism for a hand
drill. As the handle of the drill is turned in a vertical
direction, the bevel gears change the rotation of the chuck to
a horizontal rotation. The bevel gears in a hand drill have the
added advantage of increasing the speed of rotation of the
chuck and this makes it possible to drill a range of
materials.
3)The gears in a bevel gear planer permit minor adjustment
during assembly and allow for some displacement due to
deflection under operating loads without concentrating the
load on the end of the tooth.
4)Spiral bevel gears are important components on rotorcraft
drive systems. These components are required to operate at
high speeds, high loads, and for a large number of load
cycles. In this application, spiral bevel gears are used to
redirect the shaft from the horizontal gas turbine engine to
the vertical rotor.

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