Couplings Flashcards
Compression couplings use keys to transfer torque between hubs and shafts true or false?
False
Couplings are used to connect shafts that are end to end?
True or false
True
Flange face couplings will have male and female hubs?
True or false
True
Gear couplings with straight teeth are good example of a rigid coupling?
True or false
False
Hey rubber tire coupling can accommodate axial movement, angular and offset alignment conditions?
True or false
True
Rubber tire couplings can be clamped in place or may have the rubber bonded to the coupling?
True or false
False
The coupling that can accommodate the most offset miss alignment is the single, flexible metal disc
True or false
False
A curved tooth gear coupling will have both material and mechanical flexibility?
True or false
False
Steel grid couplings and chain couplings require lubrication?
True or false
True
Jaw and spider couplings are mainly used for high power drives that require no shock dampening?
True or false
False
Pin and rubber bushing couplings can accommodate substantial axial float? True or false
True
Universal joins best kept in accurate alignment for long service life?
True or false
False
Single universal joints can only accommodate small angular misalignment?
True or false
True
Consistent velocity joints more versatile than universal joints
True or false
True
Fluid couplings have an output member called an impeller?
True or false
False
Fluid couplings will have maximum vortex flow within the coupling at start up?
True or false
True
The speed of engagement on a centrifugal coupling can be easily changed? True or false
False
Dry shot couplings should be filled with the correct level of hydraulic oil, and never over filled?
True or false
False
The shear pin in a shear pin coupling will fail when the coupling is subject to overload or severe shock load?
True or false
True
Floating shaft couplings are used to save space when installing new machinery? True or false
False
When a machine needs to be held at rest or stop quickly a brake wheel coupling is a good choice of coupling? True or false
True
When removing tapered couplings off the shaft; where safety glasses; stand in the path the coupling hub will take if it is dislodged off the shaft; make sure there is clear space for the piece to fly off the shaft; and watch it very closely to see when the coupling begins to move off the taper? True or false
False
Misalignment is the greatest cause of coupling wear and destruction?
True or false
True
All couplings should be well lubricated after installation? True or false
False
A flexible coupling that is hot after running for a few hours may have serious alignment problems? True or false
True
What is the purpose of couplings?
Shaft couplings are power transmission components used to connect the driving and driven shafts end to end
Three basic types of couplings?
Rigid flexible and the special purpose couplings
What a rigid couplings?
Rigid couplings provide a fixed union between two shafts
What are some types of rigid couplings
Sleeve couplings compression couplings rib couplings flange face couplings threaded couplings
What is a sleeve coupling
Rigid coupling used in low speeds and low talk applications they consist of a piece of heavy walled tubing
What is a compression coupling
Compression couplings grip the shaft by using tapered sleeves in tapered hubs so that when the two hubs are drawn together they clamped to the shaft, require no set screws or splines used on equipment with light to moderate loads The two shafts can be the same or different diameters
Ribbed couplings?
Ribbed couplings are used in heavy load and talk services talk is transmitted through the key, make sure after talking down equals space on both sides of the coupling
Ridgid multibore?
Used to connect shafts of unequal diameter
Flange face couplings? Used to connect shafts of the same diameter or shafts of different diameters?
Made with a male and female hubs. Must be aligned accurately.
Threaded couplings
Commonly used in applications such as vertical pumps. This coupling will transmit talk between the driver and the pump adequately as long as the shaft Rotates in direction of thread.
Flexible couplings
Mechanical flexibility the parts of the coupling have a designed clearance
Material flexibility -the material of a specified part of the coupling is designed to bend or compress
Combination of material and mechanical flexibility the material temporarily deforms by compressing or bending, plus that is some internal clearance for sliding motion
Types of mechanical flexible couplings
Rolling chain silent chain synthetic chain gear
Mechanical flexibility
Mechanical flexibility couplings permit limited flexibility by allowing the coupling components to move relative to each other. These couplings have sufficient internal clearances to allow this type of movement
Chain couplings
Rolling chain single rolling double rolling silent chain synthetic chain
Chain couplings
Chain couplings have mechanical flexibility limited torsional shock and vibration dampening compatibilities very easy to disconnect some shaft misalignment and and play is accommodated by the clearances between the chain, axial travel can be up to 1/4 inch on sometimes
Rolling chain coupling
Made of high tensile heat-treated steel teeth on sprocket for maximal wear
There are two types of rolling chain couplings
Single and double rolling chain couplings
What is the difference between single rolling chain and double rolling chain
The single-strand rolling chain provides slightly more end float then the double strand roller chain due to the absence of pin link and roller link plates in the center of the chain
Silent chain coupling
Recommended for heavy duty drives at speeds of up to 5000 rpm Minor amounts of misalignment and some end play, torsional flexibility is very limited, main advantage is the ability to perform smoothly and quietly and remain in balance at the high rotational speeds
