There will be a monorail hoist brake failure, even in the no-load will also fall. We have the cone brake ring to the limit position, still no use. In the sand casting workshop, the working time almost non-stop to use the driving, so a failure will affect production,and the other kind of failure threatens the safety of workers' lives.
Cause of brake failure
In the overhaul, it is found that the hoist shaft end of a screw loosening caused by analysis, we believe that the failure is due to the hoist motor when the cone-shaped rotor in the action of electromagnetic force, in addition to the rotation movement, and produce a right axial force, so that the axis to the right movement. When the power is cut off, the electromagnetic force disappears, the rotor spindle is shifted to the left by compression spring force, so that the rotor is quickly braked, such a cycle, the vibration difference is large. Cause the braking ring and the motor back end of the snapping force between the reduction and failure, serious space-time load of the hook will also fall.
To completely solve the hoist brake failure of loose M6, fastening bolts alone is not possible, so we use anaerobic adhesive to prevent loose, the electric hoist right end cone rotor is disassembled, the screw is removed, the screw hole and screws are cleaned with acetone, the screw hole and screws are respectively coated with anaerobic glue, and the screws are screwed into, wiping out the excess glue, and the adhesive can be used after dry.