Belt Tracking Idlers
Published: Wednesday, 07 October 2009 14:55
Conveyor belt mis-tracking or mis-alignment is a major concern for many mining companies and power plants. Conveyor belt mis-tracking can cause a number of problems including conveyor belt rubbing against structural components; MSHA violations; premature conveyor damage and component failure; mis-tracking around the tail pulley will cause off-center loading; off-center loading will cause constant belt training problems on the troughing/carry side of the conveyor belt; material spillage due to mis-tracking in the loading areas; and constant cleanup/housekeeping problems due to not being able to property seal/skirt the loading area. The solution has been to install a Tru-Trainer belt tracking idler before the tail pulley to ensure the conveyor belt is square over the tail pulley and throughout the loading area. The Tru-Trainer employs a patented and highly effective tracking action which is non-damaging to the belt and reacts immediately if the belt begins to drift off center. Because it does not rely on contact with the belt edge in order to guide the belt, belt edge damage which occurs frequently with other tracking systems, is avoided. www.asgco.com
AC Induction Motor
Published: Wednesday, 07 October 2009 14:54
The SH630 Above NEMA AC induction motor from Siemens Energy & Automation is the newest member of the H-compact Plus series. It offers higher horsepower in a smaller footprint while meeting the requirements of the most demanding applications. The SH630 has been developed to provide optimal performance and efficiency in a compact design, providing up to 11,000 hp at supply voltages from 2.3
to 13.8 kV, 50 or 60 Hertz. The low-windage design and precision within all rotating and stationary components minimize friction losses. Its highly conductive copper rotors and stator windings deliver optimal electrical performance.
Like all the H-compact Plus modular motor family, the SH630 offers a wide selection of cooling configurations and enclosures (Weather-Protected Type II, Totally Enclosed Water-to-Air Cooled and Totally Enclosed Air-to-Air Cooled) to meet users’ constant or variable speed performance and ambient operating environment needs. To provide the high reliability that is imperative for the process industries, Siemens builds each SH630 using the most advanced techniques and materials in its ISO 9001-certified factory in Norwood, Ohio. The SH630 motors’ features, design and materials meet and often exceed the industry’s toughest standards—NEMA, IEC, ANSI, API, IEEE, NEC and CSA standards—making it well-suited for the oil and gas, petrochemical, mining, cement and pulp and paper industries.
The SH630 also features Siemens’ exclusive Micalastic comprehensive vacuum impregnation insulation system to extend the motor’s service life. With its line-supply and converter-fed operation, corona shielding, high switching and reversing strength, the Micalastic system delivers exceptional thermal stability, surge strength and resistance to severe environmental and electrical operating conditions. www.usa.siemens.com/motors