How to deal with the problem of broken shaft of reducer?
Electrical energy is converted into mechanical energy. In the process of energy conversion, the output shaft is equipped with pulley or coupling, which transmits torque through the belt or coupling to drive the equipment to work. In addition to the poor concentricity of the output end assembly of the reducer, if the output shaft breaks, the motor shaft will break on the load side, which may mainly appear at the front bearing support, the place with obvious knife marks, the joint of the rib plate and the main shaft, the shoulder of the shaft and the place with grooves. According to the detection research and analysis, the following points can easily deal with the problem of broken shaft.
Type selection or material defects lead to: the wrong type selection leads to the poor output of the machine. Some users mistakenly believe that only the additional output torque of the selected reducer meets the working requirements. In fact, it is not. First, the value obtained by multiplying the additional output torque of the motor with the reduction ratio is in principle less than the additional output torque of the nearby reduction speed supplied by the product sample, The second is to consider the overload ability of the driving motor and the required working torque in practice. Theoretically, the working torque required by the user. Be sure to be less than twice its extra output torque. If the instantaneous torque of the output shaft of the reducer exceeds twice of its extra output torque, and the acceleration and deceleration are too frequent, the shaft of the reducer will be broken eventually. When the selected materials are high-quality carbon structural steel and alloy steel and have not passed the useful heat treatment, the material function is poor and the strength is not good.
If there is a problem with the equipment, the motor shaft often has various grooves (such as over travel groove, unloading groove, etc.), stepped transition and shaft shoulder structures in design and process. If the groove structure is unreasonable or uneven, the transition fillet is too small, and the shaft diameter changes greatly, the output shaft and its load of the reducer are stuck under the action of alternating stress, At this time, the overload of the drive motor will continue to increase its output, the stress distribution in these parts will be extremely uneven, and the micro cracks will gradually form and expand in the parts with high stress, and finally lead to sudden brittle fracture. Especially in some applications, it is necessary to strictly abide by this principle, which is not only to protect the machine, but also to prevent the output shaft of the reducer motor from being twisted
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