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旋回破碎机的主轴矩形螺纹局部或大部剥落的现象虽不多见,却时有发生。严重剥落时,因螺纹连接强度大幅度下降,故主轴不能使用,造成破碎机停产。为此,1985年我矿对粗碎破碎机主轴螺纹进行了修复,经鉴定技术性能达到了设计要求,经试运转,情况正常。我矿使用的PX1200/180旋回破碎机,运转一段时间后,螺纹开始剥落,剥落情况见图1,其剥落面积为68.4％。螺纹这样大面积的剥落,极大地削弱了螺纹的联接强度,必须进行修复。
Cyclone crusher spindle splinter thread partial or most spalling phenomenon is rare, but sometimes occur. Serious flaking, the thread connection due to a substantial drop in strength, so the spindle can not be used, resulting in crusher shutdown. To this end, in 1985 I mine on the coarse crushing spindle screw was repaired, the technical performance of the identified design requirements, the test run, the situation is normal. I mine used PX1200 / 180 gyratory crusher, running for a period of time, the thread began to spall, spalling shown in Figure 1, the stripping area of 68.4%. Such a large area of thread peeling, greatly weakened the thread connection strength, must be repaired.