Characteristics and Application of Planetary Reducer Gear

Planetary reducer gears have the characteristics of light weight, small size, large transmission ratio range, high efficiency, stable operation, low noise, and strong adaptability. Widely used in metallurgy, mining, lifting transportation, electric power, energy, building materials, light industry, transportation and other industrial sectors.

P series planetary reducer gears adopt modular design, which can be replaced and combined according to customer requirements. There are 9-34 specifications, and the planetary transmission series has 2 or 3 grades. The planetary reducer gear adopts involute planetary gear transmission, rational use of internal and external meshing and power splitting, and the box body adopts ductile iron, which greatly improves the rigidity and seismic resistance.

Planetary reducer gears are carburized and quenched to obtain high hardness and wear resistance. After heat treatment and polishing, the noise is reduced and the efficiency and life of the whole machine are improved. The installation form includes bottom, flange and torsion arm. Shaft output methods include solid, involute spline, open spline hollow, and extended fasteners.

The main features of the planetary reducer gear are as follows:

(1) Small size, light weight, compact structure, large transmission power, and high carrying capacity; this characteristic is determined by internal factors such as structure.

A. There is the principle of power splitting. Several identical planetary gears are evenly distributed around the central wheel to share the load, so that the load on each gear is smaller, and the corresponding gear modulus can also be smaller. In the case of uniform load, with the increase of the planetary gear, its shape size decreases.

B. Reasonable use of internal meshing. High load-bearing capacity and internal gear (or ring gear) space volume, thereby reducing the radial and axial dimensions, making the structure compact and high load-bearing capacity.

C. Planetary reducer gear is a coaxial transmission device. Each center wheel forms a coaxial transmission, and the input shaft and the output shaft are coaxial, which greatly reduces the size of the transmission device in the length direction.

(2) The transmission ratio is large; as long as the type of planetary transmission and gear matching scheme are correctly selected, several gears can be used to obtain a larger transmission ratio. In planetary mechanisms that are not used as power transmission but are mainly used to transmit motion, the transmission ratio can reach several thousand. In addition, the transmission can realize the synthesis and decomposition of movement, and can also realize the complex movement such as stepped transmission and stepless transmission, because its three basic components can be rotated. A larger transmission ratio can be obtained with a planetary reduction gear, but it must be noted that its transmission efficiency will become lower.

(3) The transmission efficiency is high; due to the adoption of the symmetrical split drive structure, even if there are multiple evenly distributed planetary gears, the reaction forces acting on the center wheel and the rotating arm bearing are balanced with each other, which helps to improve the transmission efficiency. The transmission type is suitable, the structure layout is reasonable, and the efficiency can reach 0.97-0.99.