The fatigue limit of the limited life should be determined from the fatigue strength of the material. Oil seal: Imported double-lip oil seal is adopted, which has very high dust and oil leakage resistance. Spindle: Use high-quality high-purity alloy The steel 40Cr is quenched and tempered, with high suspended load capacity.Single axis, dual axis, single longitudinal axis, dual longitudinal axis are available. Bearing: The reducer is equipped with heavy-duty tapered bearings.
Transmission box, standardized, multi-variety, speed ratio 1:1, Spiral bevel gears can run forwards and backwards, low-speed or high-speed transmission is stable, and low noise, small vibration, bearing large shaft input and vertical axis output are deceleration, and vertical axis input and horizontal axis output are acceleration..7 as the limit value. Chassis: Cast iron with high rigidity FC-25;
The allowable stress of the reducer is the fatigue limit divided by the safety factor, which is determined according to the reliability of the parts, the stress state during work and the expected life. The average efficiency is 98%. Gear: Use high-quality and high-purity alloy steel 50CrMnT quenched and tempered, carburized and quenched and ground; For split transmission gears, the allowable stress of bending fatigue strength should be reduced by 20-40%.
When the reducer gear is working, the σH and σF of the gear teeth are cyclically changed. All the data in the figure correspond to the value of the pulsating cyclic stress; if it is a symmetrical cycle, the figure is The value multiplied by the reducer takes 0.5:1, 3:1, 4:1, 5:1 are all actual transmission ratios.5 China planetary gear units Manufacturersσlim–the ultimate fatigue of the gear material (determined by the test method)Flim value for bending fatigue strength limit, σHlim value for contact fatigue strength limit, KN– Life factor (related to the number of stress cycles during the effective life of N)
Description: In the general design, the lower value of the figure is adopted.25～1. Known from the foregoing: σr-corresponding to the ultimate stress at N0 N-effective number of cycles N0-cycle base m-an index related to the stress state Allowable stress is the fatigue limit divided by the safety factor: S-safety Coefficient, contact strength: S=1, bending strength: SF=1. 4.
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