塔式起重机工作时,启制动频繁,钢绳受力随载荷和作业要求不断变化。因而,卷筒中心的支承长轴要具有适应这种变化的能力。在QTZ120型自升塔式起重机的起升机构中,卷筒转动支承长轴与减速器输出端联接部位,设计了活动结合用的关节轴承。因关节轴承具有自动调位作用,可以补偿卷筒长轴的偏摆变形。1 选择计算活动结合用关节轴承属于滑动轴承,其设计计算包括动载荷确定,寿命计算,结构设计与公差设计。 Tower crane work, Kai Kai frequent moves, steel wire load with the load and job requirements continue to change. Thus, the long axis of support of the roll center should have the ability to accommodate this change. In the lifting mechanism of QTZ120 type jack-up tower crane, the reel is pivoted to support the coupling point of the long shaft and the output end of the reducer, and a joint bearing for active engagement is designed. Because the joint bearing has the function of automatic adjustment, the deflection of the long axis of the mandrel can be compensated. 1 Select the calculation of activities The joint bearing is a sliding bearing, the design and calculation, including dynamic load determination, life calculation, structural design and tolerance design.