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ZT.TQ3～5吨塔机上所采用的液力偶合器,经常因泵轮,涡轮的叶片被螺栓击掉而报废的现象,影响了工程的正常施工。经现场观察发现:是用于连接泵轮和半连轴套的普通沉头螺栓(见图中7)掉落造成。其掉落的原因是:由于电动机经常正反转变换,在惯性力矩的作用下使得转矩很大,泵轮又是用材质较软的铸铝,在螺栓销紧力、振动力的作用下,螺母容易沉陷,再加上没有可靠的防松装置(只用3个弹簧垫圈)。至使螺母松动,螺栓掉落。连接方法的改进与比较
The hydraulic coupling used on the ZT.TQ 3-5 ton tower crane is often scrapped due to pump impellers and turbine blades and is scrapped, which affects the normal construction of the project. It was found through field observation that the common countersunk head bolts (see Figure 7) used to connect the pump wheel and the semi-rotary sleeves were dropped. The reason for the drop is: Since the motor is often reversed and reversed, the torque is very large under the action of the inertia moment, and the pump wheel is made of cast aluminum with softer material, under the action of bolt pinning force and vibration force. , The nut easily sinks, and there is no reliable anti-loosening device (only 3 spring washers). Allow the nut to loosen and the bolts fall. Improvement and Comparison of Connection Methods