Belt conveyor reducer broken shaft failure analysis

Belt Conveyor gear reducer occur at off-axis high-speed shaft , the most common is to use the first level is the vertical gear bevel gear shaft speed shaft . The main reasons are :
First, the speed reducer shaft design strength is not enough
Generally occurs in the shaft shoulder broken shaft after fracture usually flush . Because here there fillet vertical vibrating conveyor , prone to fatigue damage, such as rounded corners make the gear is too small in a short period of time broken shaft . This happens should be replaced or modified gear reducer design.
Second, the high-speed shaft misalignment
    In most cases do not occur off-axis motor shaft screw conveyor , it is because the motor shaft materials are generally 45 steel , motor shaft fairly thick, stress concentration is better, so do not usually break the inertia motor shaft vibration conveyor. Motor shaft and reducer speed shaft misalignment causes the input shaft when increased radial load , increase the bending axis , long-term operation will occur off -axis phenomenon . In the installation and maintenance of its location should be carefully adjusted to ensure that two concentric shafts .
Third, the dual motor drive in case of off-axis
   Belt conveyor drive past without using fluid couplings are more prone to this type of situation , because the two motors run at startup and speed synchronization and the force balance is difficult to guarantee . Dual motor drive is on the same drive gear equipped with two rollers and two motors. Now, most have adopted a fluid coupling less off -axis phenomenon occurs, but should pay attention to the amount of fuel coupling can not be too much , so it has a torque limiting coupling effects and improve the life of the vibrating conveyor . High-speed shaft of the gear unit design or selection of smaller margin more likely to occur when the phenomenon of broken shaft .