Final Review Flashcards
Most common clutches for general purpose applications?
Friction type
What are clutches used for?
Connect prime mover to a load and protect everything in the system
What are brakes used for?
To slow down, stop and hold something in place
What are the actuation methods for clutches?
Hydraulics, pneumatic, mechanical, electric and self
Transmission of torque can take place via….
Frictional, electromagnetic flux and mechanical lock up
2 types of electromagnetic designs?
Magnetic particle and eddy current
How are magnetic particle clutches engaged?
By energizing a coil creating lines of flux
How is an eddy current clutch energized?
By DC current and with relative motion
What is the oldest and most basic type of clutching method?
Mechanical lock up
Characteristics of square jaw clutches?
Provide instant positive engagement in both directions, they cannot slip and running engagement only possible up to 10 rpm
Characteristics of spiral jaw clutches?
Engage up to speeds of 150 rpm but can only go 1 direction
What is the refinement of the jaw clutch?
Multiple tooth clutch
What does overrunning mean?
Drive in one direction, free wheel in the other direction
Wrap spring, ramp and roller and sprag clutches are examples of what?
One way clutches
Characteristics of centrifugal clutches?
The greater the speed the greater the torque
