Design a gear train which satisfies the above criteria use

Question

Question :A gear train is to be designed to transmit power from shaft 1 to shaft 2 with the following condition:

(i) Shaft 1 (driven by an electric motor) rotates at 100 revs min-1.

(ii) Shaft 2 is to rotate at 400 revs min-1 in the opposite direction to shaft 1 against a load of 200 Nm.

(iii) The centre of shaft 1 is 300 mm from shaft 2.

(iv) The minimum number of teeth on any gear is 15, all gears must have a multiple of 5 teeth and have a module of 2 mm.

(v) The maximum number of gears permissible is 4 gears and the diameter of the maximum gear must be minimised.

(vi) The centres of the gears should lie on a line which is as close to straight as possible.

(vii) All shafts have a frictional resistance of 5 Nm. Carry out the following:

(a) Design a gear train which satisfies the above criteria. Use a sketch to illustrate your design, label the gears A, B, C, etc. from the driver to the driven gear, and state the number of teeth on each gear.

(b) Determine the input power required at shaft 1.

(c) Specify the efficiency of the gear train as a percentage.

(d) Determine an equation for the efficiency of the gear train in terms of the load (torque) on shaft 2 (all other factors remaining constant).

Answer 1

The problem is basically belongs to mechanical numerical problem. For which you have to properly read all the conditions and data given above and on the basis simplify the numerical. A gear train is to be framed to transmit power from shaft 1 to shaft 2 by means of the following condition: 1) Plan a gear train that satisfies the above criteria. Make use of a sketch to describe your design, label the gears A, B, C and so on from the driver to the driven gear and define the number of teeth on each gear. 2) Find out the input power requisite at shaft 1. 3) State the efficiency of the gear train as the percentage. 4) Find out an equation for the effectiveness of the gear train in terms of the load (torque) on shaft 2 (that is, all other factors remaining stable).