key groove meaning in English

链槽。

Five key groove bit multiple keys bit hexagonal bit
五键槽花键六角钻头
For motor shafts , the highest stress is at the boundary between the key groove and the ring groove ; the next one is at bottom and terminal of the spline . according to the results , the 17 . 4mm shaft is insecurity , the 22 . 2mm and 30 . 2mm shafts are security
在轴的安全性上，对17 . 4mm泵轴计算结果是不安全的；对22 . 2mm泵轴计算结果是安全的；对30 . 2mm电机轴计算结果是安全的，而且还有较大的功率输出空间。
For the 30 . 2mm shaft , there are still larger over measure to load . the strength is increased by optimization . for ? 17 . 4mm shaft , the strength is increased by enlarge the inner dimension of the spline ; for 30 . 2mm shaft , the strength is increased by adjust the structure at the boundary between the key groove and the ring groove , the highest stress of the shaft is at bottom and terminal of the spline after optimization
其中对17 . 4mm泵轴的优化，通过增大花键内径，提高了花键齿底的强度，降低了应力集中点附近的应力；对30 . 2mm电机轴的优化，通过在轴承键的环槽端增加倒角，有效降低了该位置的应力集中，使轴的最大应力点从轴承键与环槽的交界处转变到花键根部与收尾的交界处，提高了电机轴整体结构强度的合理性。