Selection specification of planetary reducer gear

1. On the premise of satisfying the bending fatigue strength, when the center distance of the planetary reducer is constant, more teeth should be selected, which can improve the coincidence degree, make the transmission stable, and reduce noise.Under the premise of meeting the transmission requirements, the teeth numbers of the large and small gears should be mutually prime, so as to disperse and eliminate the influence of gear manufacturing errors on the transmission, and also avoid the periodic meshing of certain teeth on the large and small gears, so as to make the transmission stable. Reduce noise.

2. Adopting a smaller pressure angle can reduce the running noise. Considering the influence of the strength comprehensively, the standard value is usually 20°.

When the structure allows, priority should be given to the use of helical gears, compared with spur gears, its vibration and noise are greatly reduced.Generally, the helix angle is required to be selected between 8°C and 20°C.

3. Under the economic capacity that the user can afford, the precision grade of the gear should be improved as much as possible during the design.High precision grade gears produce much less noise than low precision grade gears.

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