BHNm | up to 200 | ||||||||
HRCm | - | ||||||||
NH0·106 | 16.5 | 36.4 |
stress cycles;
stress cycles.
2.3.3. Determine the service life in hours for the gearing:
t = L · 365 · Ka · 24 · Kd,
where L is the service life in years; Ka is the annual utilization factor that takes into account use of the gearing during a year; Kd is the daily utilization factor that takes into account use of the gearing for 24 hours. These parameters should be given in the specification for the term paper.
In our case the service life of the gearing is 7 years, Ka = 0.5, Kd =0.3
.
2.3.4. Determine the design number of stress cycles for the pinion and the gear.
Table 2.2