How is a ZIMM bevel gearbox of the ZK Series selected by calculation for a fan?

In the following example, a ZIMM bevel gearbox ZK-065 with a drive ratio of 2:1 is checked by calculation for a three-phase motor with fan. The selection is carried out by calculating input torque, output torque, output power, factors, design torque and thermal limit power. The calculated values are then compared with the permissible values.

Which initial data are used for the calculated selection of a ZIMM bevel gearbox of the ZK Series

How are input, output and factors calculated in the example?

1. Calculate input torque
T_D = 0,75 kW × 9550 / 1390 min⁻¹
T_D = 5,15 Nm

2. Calculate output torque
T_AC = 5,15 Nm × 2 × 0,97
T_AC = 10,0 Nm

3. Calculate output power
P_AC = 10,0 Nm × 695 min⁻¹ / 9550
P_AC = 0,73 kW

4. Include factors
f_b = 1,1
f_d = 1,15
f_t = 1,0
f_e = 1,0

5. Calculate design torque
T_a;AC = 10,0 Nm × 1,1 × 1,15 × 1,0
T_a;AC = 12,65 Nm

6. Calculate thermal limit power
P_t = 0,73 kW × 1,15 × 1,0 × 1,0
P_t = 0,84 kW

Which check criteria are compared in the calculated selection of a ZIMM bevel gearbox of the ZK Series?

The comparison is carried out using design torque, radial force, thermal limit power and the 80% limit of the thermal limit power.