Concept explainers
The design of the input shaft including complete specification of gear, bearings, key, retaining rings and shaft.
Answer to Problem 1P
The torque on the shaft
The torque on the shaft
The torque on the shaft
The number of tooth on gear
The number of tooth on gear
Explanation of Solution
Assume the following values for the suitable design.
Power to be delivered =
Input speed =
Output speed =
Extension of the shaft =
Gear box size =
Gear bearing life
Pressure angle =
Modulus =
Here, take the value of output speed as
Write the expression for the ratio of input and output speeds.
Here, the ratio is
Write the expression for the identical inline condition.
Here, the number of teeth of second gear is
Write the expression for the ratio of speed for a reverted compound gear train.
Here, the number of teeth on the fourth gear is
Write the expression for the ratio of speed of fourth and fifth gear.
Substitute
Write the expression for the number of teeth on second gear.
Here, the module is
Write the expression for checking the limit of the output speed.
Write the expression for speed of third shaft.
Write the expression for speed of third shaft.
Write the expression for the torque at gear
Here, the power to be delivered is
Write the expression for the torque at gear
Here, the torque on the gear three is
Write the expression for the torque at gear
Here, the torque on the gear five is
Conclusion:
Substitute
Substitute
Substitute
Substitute
Substitute
Substitute
Substitute
Substitute
Substitute
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Chapter 18 Solutions
Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
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