Selection method of flexible coupling

1. First of all, according to the requirements of mechanical characteristics, such as whether there is backlash, torsional stiffness, vibration and impact force absorption, etc., select the appropriateCouplingType. 
2. From the driving machinery (such as motor) power [KW, HP] and the number of rotations used by the coupling [N], the torque that the coupling bears [TA] 
TA(Kg.m)=973.5 ×KW/N(rpm)=716.2 ×HP/N(rpm)或 TA(N · m)=9550 ×KW/N(r/min) 3. 由被正系数表中查得负载条件系数 K 1 ，运转时间系数 K 2 ，起动停止频度系数 K 3 ，周围环境温度系数 K 4 ，求得补正扭力 [TD] 。 
TD=TA · K 1 · K 2 · K 3 · K 4 
4. The common torque [TN] of the selected coupling must be greater than the positive torque [TD]. 
TN ≥ TD

5. The maximum torque [TM] that the coupling can withstand must be greater than the maximum torque [TS] produced by both the driving side and the passive side. 
TM ≥ TS 
6. Determine whether the aperture range is applicable. 
7. In addition to the above selection steps, the vibration frequency must also be reviewed.That is, the frequency of the torque fluctuation and the natural vibration number of the shaft [N 1] avoid the phenomenon of resonance.