How to determine the peak impact torque of the reducer

The peak impact torque of the gearbox can be accurately determined through a three-step process of operating condition analysis, parameter calculation, and safety factor correction. The core is to identify instantaneous load changes during equipment operation and match them with the dynamic load capacity of the gearbox. The following are specific judgment methods:

1、 Clearly identify the source and characteristics of the impact load

Peak impact torque is usually caused by equipment start stop, sudden load changes, or mechanical jamming, and its generation scenario needs to be identified first:

1. Starting/Braking Moment: During the process of the motor from static to rated speed, the inertia force generates a starting torque that is much higher than the operating torque, usually 2-3 times the rated torque.

2. Load mutation conditions: such as crushing machine to hard material, conveyor belt jamming, mixing blade jamming, etc., resulting in a sudden increase in load within milliseconds.

3. Frequent reversing equipment, such as cranes and slewing mechanisms, generates reverse impact torque during direction switching.

Judgment method: If the equipment produces a "clunking" abnormal noise during operation and synchronizes with the load, it may be due to the peak torque exceeding the limit, causing the gear mesh clearance to jump.

2、 Calculate the theoretical peak impact torque
Based on the dynamic parameters of the equipment, estimate using the following formula:

2. Empirical estimation method (applicable to conventional working conditions)

Starting peak torque ≈ rated torque × starting coefficient (2-3)

Peak braking torque ≈ rated torque × braking coefficient (1.5-2.5), depending on braking time

Peak torque under impact conditions ≈ rated torque × impact coefficient (3-5), such as mining machinery and stamping equipment