Pit & Quarry, April 2017
CONVEYING MATERIAL HANDLING Extreme duty drum motors serve users in abrasive environments A drum motor is a one component conveyor drive where the motor gear drive and all moving parts are enclosed inside the drum The motor and gears operate in an oil bath ensuring proper lubrication and cooling With no external motor gear reducer sprockets chain or OSHA required chain guard no external component maintenance is required VAN DER GRAAF plans to further develop its Extreme Duty Series which is designed specifically for the mining and aggregate sector In sizes up to 36 in in diameter Van der Graaf now provides drum motors up to 350 hp Utilizing a high efficiency planetary gearing system these drum motors are designed to provide years of reliable use in the most abrasive environments The compact design allows the units to operate well in tight environments typically found in mobile equipment With virtually zero maintenance required the drum motor can be used in hard to access places like stackers and elevated conveyors without the need to regularly access for bearing greasing or v belt tensioning Using mechanical sealing systems Van der Graaf Extreme Duty Series drum motors are able to operate continuously in wet dusty environments With no contamination of internal parts this contributes to a longer drive life The drum motors provide a number of features that are not typically found in conventional drive systems By eliminating external components the drum motors reduce the footprint of a conveyor drive saving space The reduction of components also results in a reduction of guarding requirements making the drum motor a safer solution With no external wear parts a Van der Graaf drum motor only requires an oil change every 50000 hours Combined with an electrical savings of up to 30 percent Van der Graaf drum motors provide a lower total cost of ownership compared to a conventional conveyor drive the company says www vandergraaf com 50 PIT QUARRY April 2017 pitandquarry com
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