Ametek Gemco TM 43, Инструкция по применению

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Brake Systems Application Guide
5.Calculate Total Minimum and Maximum Torques:
T
MN
(previous) ___________Lb-Ft. T
MX
(previous) ___________Lb-Ft.
T
NLD
+ ___________ Lb-Ft. T
FLD
+ Lb-Ft.
T
MNT
___________ Lb-Ft. T
MxT
Lb-Ft.
6.Check to determine that T
MxT
is still within the torque limits of the brake size selected. If
necessary, recalculate the problem based on alternate brake size and brakewheel inertia.
The chart below shows the dynamic torque values developed by manually operated brake
systems. Maximum torques tabulated are developed at 70 lb. pedal force, the limit indicated by
AISE and OSHA. Two maximum values are shown for 10 x 4, 14 x 6, and 18 x 8 brakes, as
follows:
The chart below shows the dynamic torque ranges developed by air powered hydraulic
systems.
The maximum torques shown are developed by a 70 lb. force applied on the air treadle on
Type A/H systems or applied on the pedal of the control cylinder on Type NHM-HRC systems.
Air powered hydraulic systems include either a 1 x 5 or a 1 x 8 air hydraulic pressure cluster to
apply the service brake. In addition, 10”, 14”, and 18” brakes include either a 7/8” diameter or a
1-1/8” diameter service brake actuator. Hence, 6” and 8” brakes have two possible maximum
torque limits, while 10”, 14”, and 18” have four possible maximum torque limits.
The minimum torque limits shown are developed by light application of the treadle or pedal.
Because of hysteresis and friction in the power system valves, it is not practical to consistently
control less torque than the minimum calculated.
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