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Excessive Misalignment — Short Life
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PROBLEM
Our customer operates a take-up drive. Due to heavy loading and vibration, over time they cannot maintain alignment between the gearbox and the motor. As a result, the flexible coupling fails on a regular basis. Since it is a jaw style design, either the motor or reducer must be moved to change the element.
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SOLUTION
The motor and gearbox are wedged into a tight space. Neither can be moved back. This limits the number of options available. After reviewing horsepower and speeds, we suggested they consider an elastomeric coupling.
This design offers several desirable features. First, it provides more torque in a slightly larger envelope. Secondly, the design provides 2° of misalignment compared to 1° with most other designs. Finally, the element can be replaced without disturbing the equipment.
The elastomeric coupling was installed and is running without failure.
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