Planetary gear reducer is widely used in servo, stepper, and DC motor drive systems due to its small size, high transmission efficiency, and high precision. While ensuring precise transmission, the main function of planetary gear reducer is to reduce speed, increase torque, and reduce the inertia ratio of the load motor. Do you know the efficiency of the planetary gear reducer? What are the factors that affect its transmission efficiency? The following is the answer provided by the reducer manufacturer - Fubao to these two questions.
1. What is the efficiency of the planetary gear reducer?
The driving efficiency of the planetary gear reducer is determined by the gear ratio output of the gear number. The number of stages of the planetary gear reducer is composed of the sun gear and the surrounding planetary gears, which form an independent reduction gear system. To achieve a larger gear ratio, multiple stages of drive are required. Due to the inability of a set of planetary gears to meet a large drive ratio, sometimes two or three sets are needed to meet the user's requirements for a large drive ratio.
As the number of planetary gears increases, the length of the two or three-stage reduction stage will increase, and the efficiency will decrease. The number of stages of the planetary gear reducer is different, and the driving efficiency is also different, usually not exceeding three stages. The smaller the number of stages, the higher the driving efficiency, and vice versa:
Single-stage driving efficiency is 98%;
Two-stage driving efficiency is 98% × 98%;
Three-stage driving efficiency is 98% × 98% × 98%.
2. What are the factors affecting the transmission efficiency of the planetary gear reducer?
The transmission efficiency of the planetary gear reducer is actually related to the equipment's oil leakage, grease, and heat generation. Transmission efficiency is also one of the important evaluation indicators of the equipment. Testing transmission efficiency also requires professional equipment, because it is difficult for customers to measure specific data by themselves. In other words, the data tested by customers themselves is much less accurate than that tested by professional equipment.
However, a horizontal comparison is still possible, and the heat generation of the equipment is a direct way of comparison. Middle school knowledge tells us that energy is conserved, and the gradual increase in heat generation means that more power of the motor is used to remove friction, resulting in less output power. With less output power, the load capacity is naturally weaker, there is less force, the acceleration is naturally smaller, and the rhythm is naturally slower.
In other words, the transmission efficiency of the planetary gear reducer actually affects the working efficiency of the equipment. A decrease in transmission efficiency means that the working efficiency may slow down, resulting in losses for the manufacturing enterprise. Therefore, when purchasing this equipment, we still need to consider multiple factors. Even a seemingly inconspicuous and detailed factor may have a certain adverse effect on the equipment. We must pay attention to this kind of problem!