Type of Loads (Cont.)
(c) Pulsating loads: Reciprocating
pumps and compressors, frame saws, textile looms and generally
all machines having crank shaft.
(d) Impact loads: Apparent, regular
and repetitive load peaks or pulses which occurs in rolling
mills, presses, shearing machines, forging hammers etc. Drives
for such machines will have heavy fly wheels.
(e) Short time intermittent loads:
Almost all forms of cranes and hoisting mechanisms, excavators,
roll trains etc.
(f) Short time loads: Motor generator
sets for charging batteries, servo motors used for remote
control of clamping rods of drilling machines.
- Loads of the machines like stone crushers and ball mills
are characterized by frequent impact of small peaks so they
are classified as continuous variable loads rather than
the impact loads
|
|
