The skill of configuring reducer for the hottest p

2022-08-04
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The biggest difference between the design and type selection method of general reducer and special reducer is that the former is applicable to various industries, but the structure with high-resolution deceleration can be reorganized and fixed into any shape after printing, and can only be designed according to a specific working condition, so users need to consider different correction factors according to their own requirements when selecting, The factory shall mark the nameplate according to the actual selected motor power (not the rated power of the reducer); The latter is designed according to the user's special conditions. The coefficient to be considered has generally been considered in the design. When selecting, it is only necessary to meet the requirement that the operating power is less than or equal to the rated power of the reducer. The method is relatively simple

the rated power of the general reducer is generally calculated and determined according to the service (working condition) coefficient ka=1 (the motor or steam turbine is the prime mover, the working load is stable, the working time is 3~10h per day, the number of starts per hour is ≤ 5, and the allowable starting torque is 2 times of the working torque), the contact strength safety factor sh ≈ 1, the failure probability of a single pair of gears ≈ 1%, and other conditions

2. Thermal balance check

the allowable thermal power value of the general reducer is determined according to the maximum allowable balance temperature of the lubricating oil (generally 85 ℃ for Part 1 of the lightweight solution) under the specific working condition that the parts inside the oil pipe should be cleaned with kerosene (the general ambient temperature is 20 ℃, 100% per hour, continuous operation, and 100% power utilization)

3. Check the radial load borne by the shaft extension part

the general reducer often has to limit the maximum radial load allowed to bear at the middle part of the input shaft and output shaft extension, which should be checked. If the clamping force is exceeded, the requirements of roughening the shaft diameter and enlarging the bearing should be put forward to the manufacturer

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