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dong feng -50 qu zhou duan lie de yuan yin
Author(s): 
Pages: 19
Year: Issue:  2
Journal: Farm Machinery

Keyword:  拖拉机大修连杆轴颈技术状况良好圆角半径停机检查油底壳剪切应力过渡圆角应力集中系数油道;
Abstract: <正> 一东风-50型拖拉机大修后,曲轴缩小了两级尺寸,经过装复、磨合、试车,进入正常工作时,各部位技术状况良好,但仅工作了40个小时,油底壳内就发出了异响,遂停机检查。转动曲轴,时而卡死,时而灵活。解体后,发现第3缸连杆轴颈断裂,第2缸连杆轴颈有裂纹。测量连杆轴颈过渡圆角半径,仅有0.8毫米。纵观裂纹,为45°斜线,与扭转剪切应力
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