Exercise 1 #
Exercise 2 #
Exercise 3 #
Exercise 4 #
Exercise 5 #
Shaft / Rod Support #
Shafts are a very common, important, and basic machine element. Usually, shafts are designed for one specific machine to perform one particular task. Generally speaking, a rotating member that is used to transmit power is referred to as a shaft. Shafts can be called a Jack Shaft, a Cardan Shaft, a Tailshaft, or a Driveshaft. They are used for transmitting torque and power from the back of the vehicle's gearbox over to the differential's input shaft, which is called the Pinion Shaft.
Gears need to be mounted on some type of shaft, while a globe valve or a gate valve is closed and opened using a hand-wheel that turns another kind of shaft which is often called a spindle.
Some of the different kinds of shafts that are available include:
Stub shaft – This type of shaft is integral to a prime mover, motor, or engine and is a suitable project, shape, and size to make it easy to connect it with other shafts.
For example, it allows a belt pulley or other type of power-transmission device to be equipped to drive external machines.
Line shaft (also called a power transmission shaft) - This type of shaft connects to a prime mover and transmits power to several machines - which is now mainly superseded by machines that have their own motors.
For example, the overhead line shaft runs continuously. Individual machines only can be stopped by the flat drive belts being moved from the driving pulley to a free-running pulley. The building's mostly timber construction allows for a significant amount of flexing of structures that are under the load.
Jack Shaft – This is a type of short shaft used for connecting a prime mover to another shaft or a machine. It can also be a short shaft that is positioned as an intermediate between a driven machine and a prime mover.
For example, the Speed reduction is similar to that of gear drives.
Flexible shaft – allows the power to be transmitted between two shafts (e.g., machine shaft and motor shaft) with rotational axes at an angle or at the point where the angle in between the shafts might change.
For example, a Japanese-style backpack mower has a flexible shaft between the normal hand-held mower assembly and the red power pack. Generally speaking, flexible shafts are not utilized to transmit high speed or high powers.
A majority of shafts are made out of steel, either medium- or low-carbon. However, high-quality alloy steel, normally heat-treated, can be used for critical applications. Light-duty, small shafts, e.g., inside household appliances, can be injection-molded into a plastic material like Delrin or nylon. Other meals, e.g., aluminum, stainless steel, or brass, can be used whenever lightness is required, or corrosion is an issue.
In corrosion, copper tubing suspension causes a challenging problem. If there are severe local corrosions due to extreme humidity, acid fumes, etc., then copper-plated steel will not be satisfactory, and it will require special materials to be used. This mitigates galvanic corrosion from occurring. There is no electrical continuity between the support beam and pipe.
The flanged support blocks have been specially designed to secure the shafts to the mounting surface at right angles. The Flanged supports are made out of spheroidal graphic cast iron that have flanged liner sets.