Machinery Lubrication magazine published by Noria Corporation
Issue link: https://www.e-digitaleditions.com/i/957021
in a circulation system utilizing both heat transfer systems and filtration. e oil is often synthetic, but this is not always necessary if the flow rate is adequate and the heat transfer system is efficient. e inherent frictional properties of certain types of synthetic lubri- cants may be advantageous, as might the high viscosity index. However, the selection of a synthetic grease likely will be more important than the selection of a synthetic oil for the gearbox, as greased bearings will not provide the same cooling effects. In most cement plants, slow-moving conveyors, sometimes called clinker conveyors, transport material directly from the kilns. ese conveyors typically are constructed of metal and consist of a series of buckets that are hinged together. ey are often carried by wheels on guide rails with a grease nipple in the center. Because of the adverse oper- ating conditions, i.e., dusty and hot, they will require frequent greasing. Centralized greasing systems will not work in this type of application due to the constant movement of the wheels. A system must be installed that travels with the buckets for a short distance, with greasing probes automatically projected into the grease nipple. is type of automatic system works well, but it must be checked on a regular basis because of the many moving parts and associated sensors. Large cement plants frequently have a limited lubricant stock in order to keep lubri- cant application as simple as possible. While this approach can be somewhat effective, specialized lubricants should be considered in certain applications. eir increased initial cost can lead to larger savings in the long run as a result of the equipment's longevity and reduced downtime. Consideration should also be given to the use of synthetic gear lubricants in larger geared drives, as their potential energy savings can be significant. Although every cement plant operates differently and will have its own existing lubrication strategies, preferences, histor- ical problems, maintenance requirements, management structure and available work- force, optimum solutions can be identified regarding the lubricants selected, the equip- ment utilized to apply those lubricants and the maintenance regime. All of these elements can then be combined with appropriate condi- tion monitoring techniques. By coordinating both lubrication and condition monitoring strategies with your maintenance regimes, you can ensure that your cement plant oper- ates more efficiently and cost effectively. ML www . machinerylubrication.com | March - April 2018 | 31 Visit us at Booth #109 ML