Module 5 Flashcards
are machine elements used to prevent relative motion between the shaft and the member to which it is connected such as pulleys, gears, and crank.
Keys
What are the two classificcation of keys?
- Constant Cross Section
- Variable Cross-Section
What are the types of constant cross section keys?
sqaure key, flat key, round key, barth key
What are the common types of keys for industrial applications?
Square Key and Flat Key
What key have a square cross section?
Square Key
What key sunk half in the shaft and half the hub?
Square Key
What key has a rectangular in cross-section with smaller dimensions placed in radial direction?
flat key
What key is sunk in half in each of the two mating members?
Flat Key
What are the four types of variable cross-section keys?
- woodruff
- Saddle Key
- Gib Head
- Feather Key
What are the forces that are of the two classes?
- Forces due to the fit of the key in its keyway, as in tiht fitting straight key or in a tapered key driven in place. These forces produced compressive stress in the key, and it is impossible generally predict their magnitudee.
- Forces that are caused by the torque transmitted. These force produce compressive and shearing stresses in the key. The distribution of the forces along the length of the key is not uniform, since the forces are concentrated near the torque input end. The non-uniformity of the distribution is caused by twisting of the shaft within the hub.
What is a mechanical device used to unite or connect teo mechanical shafts for the purpose of transmitting power?
Coupling
It is used to connect section of the shaft or connect the shaft of the driving machine to the shaft of a driven machine?
Coupling
What are the main classification of coupling?
Rigid Coupling and Flexible Coupling
It is a device used to connect the end of the shaft to the end of another shaft that do not allow any misalignment.
Rigid Coupling
It is used to take care of a small amount of unintentional misalignment.
Flexible Coupling
It usually applies to a coupling having two separate cast iron flanges.
Flange Coupling
This type of coupling is each is mounted on the shaft end and keyed to it.
Flange Coupling
This type of coupling faces are turned up at right angle to the axis of the shaft.
Flange coupling
One of the _ has a projected portion and the other __has a corresponding recess. This helps to bring the shafts into line and maintain alignment.
flange
The two ___ are coupled together by means of bolts and nuts
flange
The _______ coupling is adopted to heavy loads and hence it is used on large shifting.
flange
What are the types of flange couplings?
unprotected type, protected flange type, and marine flange type
It is also called a compression coupling or split miff coupling.
Clamp Coupling
In this coupling, the sleeve is made of two halves which are split along a plane passing through the axes of the shafts. The two halves of the sleeve are clamp together by means of bolts.
Clamps Coupling
