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东风4型内燃机车轴箱体内滚动轴承与轴颈的配合为φ160(D_1(~(+0.024))/g_α(~(+0.052) _(+0.025))),其过盈量仅为0.001～0.052,这对于机车轴箱的工况来说,显然是不足的。在有温升、重负荷和冲击力的作用下,很容易在配合面之间产生相对位移,所以轴套在工作时就必然会出现周向转动和轴向窜出。据统计,原配属我段的两台东风4型机车(0132、0133号现已调配给南京东机务段)在走行25万公里后,轴箱滚动轴承内套有松动现
The fitting of the rolling bearing and journal of the axlebox of Dongfeng 4 diesel locomotive is φ160 (D_1 (~ (+0.024)) / g_α (~ (+0.052) _ (+0.025))), the interference is only 0.001 ~ 0.052, This is obviously not enough for the condition of the axle box. Under the action of temperature rise, heavy load and impact, it is easy to produce relative displacement between the mating surfaces. Therefore, the sleeve must be rotated circumferentially and axially when working. According to statistics, two Dongfeng 4 locomotives (originally assigned to Nanjing East Locomotive Depot of No. 0132,0133) that originally belonged to me were loosened within 250,000 km of roller bearing