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["泵轴问题,想请教"

2019-08-15View Original

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"친구들, 저这里有个直接用电机驱动叶轮的自吸泵,目前轴突然断了。这个轴是一体车成的,前半段直径nmm mm,后半段直径45 mm,断裂处就是在n和45的交接处。从断裂面来看,之前就已经断了一半了,因为这一半已经生锈了。因为这个泵不常开,所以这次才完全断了。我想问一下,这种轴前后直径差这么多,设计合理吗?是否会因为直径差,容易造成轴断裂。这种泵没有轴承,对于转数有没有什么要求,是不是不能高于多少?"
Reply #22019-08-15
"그 부분의 라운지 상태는 어떠한가요?那个地方容易应力集中"
Reply #32019-08-15
"그 泵轴是什么材质的,裂纹慢慢成长"
Reply #42019-08-15
"변경 부분의應变容易集中,不过,n到45似乎突变有点厉害了。"
Reply #52019-08-15
"n mm的轴,应该是n KW的电机,这样的的轴,都是45#钢加工后调质,硬度是具备的,不过,这么大的轴,对于加工过程就显得尤为重要,是整根车,还是焊接后车,这也决定轴的寿命,另外,回火淬火过程是不是严格也很重要,如果先天没有缺陷,那就是调质过程存在问题,轴的脆性稍大所致。火候是很重要的,脆了容易断,软了叶轮容易扫箱。"
Reply #62019-08-15
"说实话,轴径大小、轴径尺寸突然变化与断轴没有直接关系,从尺寸变化处断断大部分是,因为轴径过度没有做好倒圆和不合理过渡的卸荷槽所致"

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