Prepared By;
Vivek Hayaran
Prahalad Yadav
Aniket Kumar
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The shafts may be designed on the basis of -
-Strength
-Stiffness
Cases of designing of shafts, on the basis of Strength
(a) Shafts subjected to Twisting Moment only.
(b) Shafts subjected to Bending Moment only.
© Shafts subjected to Combined Twisting and Bending Moment only.
Pls send me the ppt of whirling of speed
DESIGNING OF SHAFTS
Shafts
Previous projects have pointed out the importance of machine elements such as fasteners, springs, gears, valves, pipe fittings, etc., in engineering design. SHAFTS, too, are a basic, important and very common machine element. We have already come across some examples of shafts in earlier projects, e.g. gears must be mounted on some sort of shaft, and a gate valve or globe valve is opened and closed by a hand-wheel turning another type of shaft often referred to as a SPINDLE. It is normal practice to buy items such as gate or globe valves, gears, pulleys and many other items as standard components, "off the shelf". In other words, a manufacturer makes large quantities of industry-standard items which are sold in many different locations for many different purposes. Shafts generally do not fall into this category. A shaft is usually designed to perform a specific task in a specific machine. There may of course be thousands of similar machines produced, each using a shaft of that design, and the manufacturer may provide extra shafts as "spare parts", but that shaft design generally has no use outside the machine for which it was designed. It follows that designers will frequently be called upon to design shafts and it is therefore important for them to understand the requirements of shafts and the design features needed to fulfil these requirements.