What is the safety factor of planetary reducers?

What is the safety factor of planetary reducers? The safety factor of planetary reducers, also known as service factor or usage factor, is mainly obtained by dividing the rated power of the reducer by the motor power. The safety factor of the reducer is very important and can directly determine the normal operation of subsequent equipment. So, how should we determine the safety factor of planetary reducers?

Planetary reducer

The safety factor of planetary reducers refers to the determination of the utilization factor of the reducer (generally>1, that is, the reducer capacity>motor capacity) based on factors such as operating conditions and driven machinery when selecting the reducer, to ensure that the rated mechanical and thermal energy of the reducer has an allowance. The influencing factors include running time, load, also known as "load" situation, etc.

One of the basic requirements for the safety factor of planetary reducers is to ensure that the gears have sufficient load-bearing capacity. At present, although there are recognized (standard) calculation methods for the bearing capacity of tooth surface, tooth root, and bonding, there are many factors (commonly expressed as coefficients or parameters) that affect the bearing capacity of gears, and some influencing factors are contradictory and mutually restrictive. Therefore, it is difficult for an ordinary engineering technician who is just starting to engage in gear transmission design to successfully complete gear transmission design. When calculating the bearing capacity of the planetary reducer device, it is crucial to choose an appropriate safety factor, as excessive safety factors can increase the overall size and weight of the transmission device, thereby increasing manufacturing costs; If the safety factor is too small, it can cause unexpected failures and dangers. The appropriate safety factor should be within a reasonable manufacturing cost to enable the equipment to meet the given reliability requirements.

Minimum safety factor for gear contact and bending fatigue strength:

High reliability (failure rate not exceeding 1/10000) 1.50-1.60, 2.00

High reliability (failure rate not greater than 1/1000) 1.25-1.30, 1.60

General reliability (failure rate not greater than 1/100) 1.00~1.10, 1.25

Low reliability (failure rate not greater than 1/10) 0.85, 1.00