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Coupling selection case calculation

2022-02-13|admin


There are usually two ways to choose a coupling:


Select a suitable coupling according to the maximum torque, i.e. the peak torque required by the load should not exceed the rated torque of the coupling:


TKN ≧ 1.5 TAS Nm


The coupling is selected according to the acceleration torque. At this time, the rotational inertia of the drive system needs to be considered. If the inertia ratio is large, the influence of the load factor in the calculation of the coupling specification will be reduced:


聯軸器負載系數計算.png

振動或負載系數 SA

均勻載荷

非均勻載荷

高動態載荷

1

2

3-4

對伺服電機來說,負載系數通常為SA=2-3

 

Calculation example:


Servo motor drive, maximum torque TAS=50Nm


Load factor SA=3


聯軸器選型計算.png

So 聯軸器選型計算公式.png,It can be seen that when the load inertia is relatively large, the inertia of the coupling itself has little influence on the calculation results.


In addition to the torque, it is necessary to consider whether the speed meets the requirements. Most of the R+W couplings have been preliminarily balanced before leaving the factory. The default speed of some smaller models can reach 10000rpm. If the equipment needs The rotation speed is relatively high, and additional dynamic balancing treatment is required.


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