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减速机许用应力为疲劳极限除以安全系数与零件可靠度决成正比
click：2389 Add time：2017-03-29 11:41:17 information sources：
The allowable stress of the reducer is divided into the fatigue limit and the safety factor, which is determined according to the reliability of the parts, the stress state and the expected life of the work.
When the gear reducer is working, the sigma H and sigma F of the gear teeth are cyclical changes, the fatigue limit of the finite life should be determined from the fatigue strength of the material. From the foregoing knowledge: sigma R - ultimate stress corresponding to N0
N - effective number of cycles
N0-- cycle base
M-- index of stress state
Allowable stress is divided by the safety factor:
S-- S=l: safety coefficient, contact strength, bending strength, fatigue limit of SF=1.25 ~ 1.5 Sigma lim-- gear material (determined by the test method) on the bending fatigue strength limit Sigma Flim value on contact fatigue strength limit. Hlim value, KN-- life factor (check book figure associated with the number of cycles should be the effective life of N description):
In general design take the value of the figure in the lower
All the data in the corresponding numerical charts of pulsating cyclic stress; such as symmetric circulation, in operation in 0.7 as the limit of speed reducer.
For the open transmission gear, the bending fatigue strength should be reduced by 20 ~. Transmission box, standardized, multi species, the ratio of 1:1, 1.5:1, 2:1, 2.5:1, 3:1, 4:1, 5:1 for the actual transmission ratio. Average efficiency 98%.
2, a single axis, two axis, single longitudinal axis, double axis optional.
3, spiral bevel gear can be positive and negative operation, low speed or high speed transmission is stable, and the noise is low, vibration is small, bearing large shaft input, the vertical axis output for deceleration, the vertical axis input, the horizontal axis output for the growth rate.
4, the chassis: the use of high FC-25 cast iron;
5, gear: the use of high quality and high purity alloy steel 50CrMnT quenching and tempering process, after carburizing quenching and grinding;
6, spindle: the use of high-quality high purity alloy steel 40Cr quenching and tempering process, with high load capacity.
7, bearing: reducer equipped with heavy load capacity of the rolling cone bearing;
8, oil seal: the use of imported lip seal, with a high ability to prevent dust leakage.
When the gear reducer is working, the sigma H and sigma F of the gear teeth are cyclical changes, the fatigue limit of the finite life should be determined from the fatigue strength of the material. From the foregoing knowledge: sigma R - ultimate stress corresponding to N0
N - effective number of cycles
N0-- cycle base
M-- index of stress state
Allowable stress is divided by the safety factor:
S-- S=l: safety coefficient, contact strength, bending strength, fatigue limit of SF=1.25 ~ 1.5 Sigma lim-- gear material (determined by the test method) on the bending fatigue strength limit Sigma Flim value on contact fatigue strength limit. Hlim value, KN-- life factor (check book figure associated with the number of cycles should be the effective life of N description):
In general design take the value of the figure in the lower
All the data in the corresponding numerical charts of pulsating cyclic stress; such as symmetric circulation, in operation in 0.7 as the limit of speed reducer.
For the open transmission gear, the bending fatigue strength should be reduced by 20 ~. Transmission box, standardized, multi species, the ratio of 1:1, 1.5:1, 2:1, 2.5:1, 3:1, 4:1, 5:1 for the actual transmission ratio. Average efficiency 98%.
2, a single axis, two axis, single longitudinal axis, double axis optional.
3, spiral bevel gear can be positive and negative operation, low speed or high speed transmission is stable, and the noise is low, vibration is small, bearing large shaft input, the vertical axis output for deceleration, the vertical axis input, the horizontal axis output for the growth rate.
4, the chassis: the use of high FC-25 cast iron;
5, gear: the use of high quality and high purity alloy steel 50CrMnT quenching and tempering process, after carburizing quenching and grinding;
6, spindle: the use of high-quality high purity alloy steel 40Cr quenching and tempering process, with high load capacity.
7, bearing: reducer equipped with heavy load capacity of the rolling cone bearing;
8, oil seal: the use of imported lip seal, with a high ability to prevent dust leakage.
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