Breaks And Cluthes

Question 1

What do clutches do?

Answer 1

Smooth transmission of power
Protect machines or saftey feature

Question 2

What are breaks used for?

Answer 2

Stop slow or hold a load

Question 3

What are the methods of power transmission?

Answer 3

Friction types
Magnetic and electromagnetic
Mechanical lockup

Question 4

What are the methods of actuation of power transmission?

Answer 4

Hydraulic
Pneumatic
Electromagnetic
Mechanical

Question 5

Lines of flux is?

Answer 5

Putting current into a coil creating magnatisum

Question 6

Friction types

Answer 6

Rotation in both directions
Heat generation / heat dissipation

Question 7

Electromagnetic

Answer 7

• Magnetic particle - lines of flux attract particles to give power transmission
  -Rotation in both directions
• non friction

-Eddy current - DC voltage
-will not stop or hold
-small to light load
-rotation in either directions
-must be motion between two magnetic surfaces to work

Question 8

Direct mechanical lock up

Answer 8

-oldest
-self actuation

TYPES
-wrap spring- one direction
-sprag - one direction
-Ramp and roller- one direction
- centrifugal- both directions / more speed =more torque transmission
^^^ no outside control needed

AKA backstopping / overrunning / one way

-square jaw
- positive engagement
-0-10 RPM
- no overload
- both directions

• spiral jaw
  -0-150 rpm
  -one direction
  -positive engagement

-Multi tooth
- same as square jaw but uses electromagnetic/ hydraulic/ pneumatic engagement