Ametek Gemco TM 43, Инструкция по применению

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Brake Systems Application Guide
The total dynamic torque required for an overhauling load is the sum of T
d
and T
0
, as follows:
T
t
= T
d
+ T
o
where: T
t
= Total dynamic torque for descending load
BRAKE THERMAL CAPACITY
When a brake stops a load, the energy required to stop is converted to heat. This heat is
absorbed by the brake and the wheel. The ability to absorb and dissipate heat without exceeding
temperature limitations is known as thermal capacity.
There are two types of thermal capacity. The first is referred to as the maximum energy the brake
can absorb in one stop, or emergency stop. The second is the heat dissipation capability of the
brake if it is for frequent stopping.
The kinetic energy that must be absorbed and dissipated by the brake can be determined as
follows:
Rotational Loads:
WK
T
2
X N
B
2
KE
r
=
5875
where: KE
r
= Kinetic energy of rotating load (ft-lb)
WK
T
2
= Inertia of the rotating load reflected to brake shaft (Ib-ft
2
)
N
B
= Shaft speed at brake (RPM)
5875 = Constant
W x V
2
KE
L
=
2g
where: KE
L
= Kinetic energy (ft-lb)
W = Weight of load (lb.)
V = Linear velocity of load, (ft/sec.)
g = Gravitational constant (32.2 ft/sec
2
)
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