Experiment Name: Study on gearing mechanism of tappet loom.
Theory: Tappets are generally used for heald shedding.
Tappet is a type of cam to which a rotary motion is given for the purpose of
producing reciprocating motion in rods and levers by sliding contact. When the
rod is to receive a series of lifts, with intervals of rest and thus forms a
shed called tappet.
Objective:
1) To learn about
gearing diagram or mechanism of tappet loom.
2) To learn about different parts related with the
experiment.
3) To write a report according to this experiment.
Figure:
Related machine parts:
Motor
Motor Pulley
Machine Pulley
Gear
Crank Shaft
Bottom Shaft
Tappet
Construction of the mechanism:
1) The machine pulley connected with motor by belt.
2) Machine pulley is connected with crank shaft and crank
shaft wheel.
3) Crank shaft wheel connected with bottom shaft wheel.
Which rotate the bottom shaft.
Working Principle:
1) When motor rotate, the machine pulley also rotate because
motor pulley connected with machine pulley by belt.
2) Crank shaft wheel also rotate with machine pulley and
crank shaft which transmit the motion to bottom shaft wheel.
Calculation:
R.P.M of motor : 960
Motor pulley dia = 3"
Machine pulley dia = 24"
No. of teeth of crank
wheel = 38
R.P.M of crank shaft = 960 X (3/24) = 120
R.P.M of bottom shaft = {960 X (3X38)} / (24 X 76 )
=
60
Result : R.P.M of
crank shaft = 120
R.P.M
of bottom shaft = 60
Conclusion :
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