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What are general concerns associated with industrial Fluid Drives? Since most Fluid Drives have been in operation for over ten years on continuous or stop and start duties, maintenance should be considered in order to maintain past reliability. The most common brands of variable speed Fluid Drives used in an industrial application are the American Blower/American Standard Gyrol and Liquid Drive Power Mate. Maintenance trends that we have experienced and feedback from your colleagues indicated the following are the most frequent causes of unscheduled shutdown. WEAR - Ball or Roller Bearing - Internal Oil Pump Impeller, Key and Seals - Internal Oil Pump Reversing Valve - Shafts at Shaft Seals Surfaces - Scoop Tube Assembly, Control Rod and Seals DRYING OUT OF GASKETS & "O" RINGS POOR OIL QUALITY MISALIGNMENT COOLER CLEANLINESS Since Fluid Drives are volume sensitive devices, proper oil flow is critical for power transmission, lubrication and dissipating of heat. Low oil pressure will cause unit to over heat, increase response time to speed change, and reduce lubrication to critical components. Vibration is a good indicator of the running condition of the unit. If the unit runs under high vibration for an extensive period of time, mechanical damage will occur to the bearings and shafts and possible major damage to the aluminum input and output rotors could occur. Oil quality is another important indicator that if monitored will identify whether excess wear is occurring in your unit. Since the Fluid Drive housing that supports the bearing is also the reservoir for the hot oil, shaft alignment should be checked periodically due to the effects of thermal growth. |
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