technical data Reducer Worm Reducer Selection

Selection example

For operating conditions that do not fall under Selection Tables 1 and 2 for the EWJ, EW, SWJ, and SW series (Selection Table 3), and for the TD series, please select using the following procedure.

conditions

  • ・Machine name: Stirrer (pure liquid)
  • Motor: 15kW, 1450 r/min
  • ・Output shaft rotation speed: 24 r/min
  • ・Output shaft torque: 4000N・m {408kgf・m}
  • ・Other: Vertical/Hollow
  • - Output shaft load: Axial load only 18000N
  • ・Operating time: 10 hours/day
  • ・Number of startups: 1 time/hour
  • Ambient temperature: 30°C

Selection

1. Determining the correction factor

Machine load classification table (pure liquid) = uniform load: U, and from Service factor table (Table 1), Sf = 1.0.

2. Determine design kW and corrected torque

Correction torque is calculated from Service factor and load torque.

Corrected torque = 4000N・m × 1.0 = 4000N・m

3.Determining the reduction ratio

The reduction ratio is calculated from the motor rotation speed and output rotation speed.

Reduction ratio = 1450 r/min ÷ 24 r/min ≒ 60

4. Deciding on size

Select a size that satisfies the corrected torque from the kW ratings table kW ratings table

Size: TD175 Nominal reduction ratio: 60 (output torque 4785N・m at input 1450 r/min)

For the TD series, the equivalent heat capacity was confirmed.

[Check equivalent heat capacity]

With an ambient temperature of 30°C and the temperature correction coefficient table (Table 3), the temperature correction coefficient f1 is 1.0.

Equivalent heat capacity = 4000N・m × 1.0 = 4000N・m

5. Check the axle load

An axial load is generated on the output shaft, and check whether it is within allowable load.

Axial load: 18000N < Allowable axial load = 34255N (Output hollow: H output 59 r/min or less)

6. Calculating the required input kW

Check the required motor kW using the TD175 - 1/60 kW ratings table.

Required input kW = 14.2kW x 4000N・m 4785N・m x 1.0 = 11.87kW, so a 15kW motor is sufficient

Select model number TD175H60VRF(LF) from vertical mounting (V type) and hollow (H)