First, increase the ring gear contact stress
Planetary gearbox nuclear strength is usually the nuclear solar wheel – planetary wheel transmission contact stress, solar wheel – planetary wheel bending stress, planetary wheel – inner gear transmission contact stress.
The ring contact stress is usually more first failure, so to increase the carrying capacity, the first thing to ensure the ring contact stress.
Second, gear shape
Profile trim, root repair and tooth end trim are better ways to improve the transmission performance of heavy-duty gears, because for heavy-duty gears, generally at the end of the tooth trim can prevent the end of the tooth overload caused by the direction error.
Third, the adjustment of the variable coefficient
The correct selection variable factor can increase gear carrying capacity by 20% to 30%.
Fourth, control gear accuracy and error
The flank strength is not only related to the gear accuracy level, but also to the value of the base section error, if the base section error of the gear is large, then the rolling pressure added to the teeth is also large.
V. To choose a good gear material
Six, tooth root strengthening
The bending strength of the gear has a great relationship with the condition of the root surface, especially the defects such as decarbonization layer on the root surface of the carbide quenching gear, which can hardly guarantee the residual pressure and reduce the fatigue intensity of the root bending, so the root strengthening measures are taken to improve the fatigue intensity.
Seven, increase the width of the teeth
When the outer diameter of the planetary gearbox transmission is constant, the internal gear width can be increased appropriately, which can effectively increase the carrying capacity of the gear.
Eight, increase the gear module, increase the profile angle
Planetary gearbox outer diameter size unchanged, need to increase the carrying capacity, can take reasonable increase gear module, reduce the number of gear teeth to meet.