Views: 465 Author: Site Editor Publish Time: 2019-07-12 Origin: Site
1. Cranes Work duty Classification
|State of loading||FEM||ISO||GB||Cycles/H||Start/H||Ed in %|
2. Determining the Operating Group of the Hoist
According to the Average daily operating time to separate the lifting mechanism work duty:
Average daily operating time (hours per day)
How to calculate the Average daily operating time ?
The average daily operating time of the hoist can be calculated from the running time of the hoisting machinery (hours per day):
t = (2 × H ×N × T) ÷ (V × 60)
T:Average Daily Operating time.
H:Average lifting height (meter)
N:Number of Work Cycles Per Hour (cycles/h)
T:Daily working time (h)
V:Lifting Speed (m/min)
3. Work duty Classification
Light Duty: Mechanism subjected very rarely to the maximum load and normally, to light loads.
Widely used in the power plant and areas where mainly use to installation and maintenance the machines, or the not busy workshop.
Moderate Duty: Mechanism subjected fairly frequently to the maximum load but, normally, to rather moderate loads.
Widely used in the busy work shop, like the normal machinery processing and assembly line etc.
Heavy Duty: Mechanisms subjected frequently to the maximum load and, normally, to loads of heavy magnitude, Widely used in the busy workshop, long times and frequently loading the heavy duty materials, steel plant etc.
Super Heavy Duty: Mechanisms subjected regularly to the maximum load, mainly used in the steel plant, casting plant etc.