Use Differential Axle and Wheel.

 

Practical Significance

Many times there is a need to lift the loads and depending upon the type of load, intensity of load and other site conditions different lifting machines are used. Differential Axle and Wheel machine is used to lift the smaller loads with constraint of space. After performing this experiment a Diploma Engineer will able to decide the suitability of Differential Axle and Wheel based on the given load lifting situation.

Relevant Course Outcomes 

Select the relevant simple lifting machine for a given purpose.

Practical Outcome

Use Differential Axle and Wheel machine to lift smaller load.

Minimum Theoretical Background

Differential axle and wheel: It is different from simple axle and wheel machinebecause of its axle configuration. Instead of prismatic single axle in simple wheel and axle, step down axles are used in differential axle and wheel. This machine has a better mechanical advantage as compared to single axle and wheel. Two axles of different diameters are coaxially fitted with the spindle, with which a wheel is also coaxially attached. The effort is applied through a wrapped string wound around this wheel. Another string is wound over two axles and carries load with the help of movable pulley. The rope on the wheel and smaller axle are wound in the same direction, whereas that on the larger axle is in opposite direction. When an effort is applied through the wheel, the rope on the wheel and smaller axle gets unwound but gets wound on the larger axle, thus lifting the load.

Conduction of experiment

Practical Related Questions

1. Write four field applications of Differential Axle and Wheel

2. Can this machine is used to lift heavy load?

3. Weather the given machine is reversible or not? Give reason.

4. Write the principle used in increasing VR of differential axle and wheel than the simple axle wheel.

5. Write the purpose of using different sizes of axles. 

6. What will happen if same sizes of axles are used?

7. Calculate maximum M.A. and maximum efficiency of machine from graph.

8. Determine the effort required to lift the load of 100kN from law of machine.