NORD Drive Systems – designed by German precision engineers, Getriebebau Nord, and assembled locally by BMG – encompass modular drive configurations that ensure optimum performance of mechanical speed control for specific applications. Suitable for use in almost every industry, typical applications are in water, wastewater, waste and raw materials management.
“Nord drive solutions, which meet stringent local and international quality standards, are known for reliability, energy-efficiency, low noise levels, extended service life and reduced maintenance,” says Johan (Os) Stoltz, national product specialist, Nord Drive Systems, BMG’s electromechanical drives division.
These modular drive systems incorporate advanced drive technology and special design features to meet the precise re-quirements of every operation. Pumps, mixing and agitating systems are required to meet high demands in environmental technology, to distribute safe drinking water, convey wastewater and circulate activated sludge.
“BMG’s Nord agitator drive systems – which easily move large masses in agitating and mixing applications – consist of an electric motor, frequency inverter, Maxxdrive gear unit and accessories. The Nord Maxxdrive series is the only complete industrial gear unit system on the market with a one-piece Unicase lightweight housing for mixing and agitating processes.
“Nord helical and helical bevel gear units – available from BMG in various sizes and speed ratios – offer high operational reliability and protection against leaks through optimum sealing. The robust and rigid design enables the system to cope with excessive loads, while the short total axis spacing results in low bending torques and extended operation times for the entire drive system.
“BMG also offers a wide range of attachment options for simple and economical integration into mixing and agitation industry applications. We also supply numerous Nord drive components as explosion-protected ATEX versions, for safe operation in hazardous areas, including Zone 1, 2, 21 or 22.”
Nord Maxxdrive units offer high output torques, from 15 to 282 kNm and ensure reliable operation even under extreme conditions. These compact industrial gear units are designed for vertical and horizontal installa-tion positions, requiring minimal space.
An important feature is the IEC/NEMA approved (Safomi – sealless) adapter for agitators, which prevents vi-brations during operation.
This adapter includes an oil compensation volume, so attachments and wearing parts, like an oil tank and drive shaft sealing ring, are not necessary.
This results in greater operational reliability and reduced maintenance.
Existing Maxxdrive helical gear units with standard IEC/NEMA adapters can be easily converted for Safomi adapters.
Bearings
Nord drive systems for agitators, pumps and mixers used in process plants are engineered with reinforced bearings and increased bearing spacing. Reinforced and larger output shaft bearings allow the gear unit to absorb high radial and axial bearing loads that occur during the agitating process. Advantages of oversized output bearings include quick assembly, large bore capacities, high radial load capacity and longer service life.
To enhance efficiency, BMG offers an agitator version (VL2 bearing) with increased bearing spacing and reinforced bearings, as well as a drywell version (VL3) with an additional oil drip plate and leakage or oil sensors. The bearing spacing of VL2 and VL3 versions is increased with attachments, while the gear unit size remains unchanged.
Coaxial drives are recommended for agitators and mixers that require a double agitator, due to the large size of the tank.
