Case 4: Cement Application

Excessive wear to blades, center plate and hub bolts due to process material in the air flow. This fan is located inside and in an awkward location, making a rotor change-out a difficult and lengthy job.

Solution:

Robinson Service provided and installed center plate wear pads made of 3/8” erosion resistant material. They removed the old hub bolts, replaced and torqued down new bolts, and added hub bolt covers for further protection. The leading edge of each blade was repaired by welding numerous passes and capping off with a final overlay of hard surface weld material.

Result:

All repairs were accomplished by working through the available access doors. The fan rotor did not have to be removed, reducing time in bearing tear-down and reassembly, realignment of equipment and crane rental.