Embed Size (px)
Citation preview
SUCCESS STORYWhere ROSTA made the difference
CONTACTGórnicze Zakłady Dolomitowe S.A.ul. Bacholinska 1142-470 SiewierzPolandPhone +48 32 6744300 Fax +48 32 [email protected]
Górnicze Zakłady Dolomitowe S.A.Górnicze Zakłady Dolomitowe (GZD) is located in Siewierz and one of the largest aggregate plants in Poland. Exploitation of aggregate is carried out by opencast method and the end product is wide-ly used in construction, agriculture or metallurgy.
MB 70 × 800
HOW TO REDUCE MAINTENANCE COSTS MASSIVELY
ROSTA AGHauptstrasse 58, CH-5502 Hunzenschwil, Switzerland
Phone: +41 62 889 04 [email protected], www.rosta.com
BENEFITS– Saving 13 hours of weekly maintenance– Saving on belts, pulleys and bearings– Higher productivity– Higher Yield
THE INITIAL SITUATIONAs in many quarries, a first step in processing mined rocks is crushing them. In this case the crusher is equipped with 110 kW motor connecting the drive with 8 SPC 7500 V-belts. The motor was mounted on traditional sliding setup creating a fixed connection be-tween the pulleys. Since the quarry has a high work load the crusher suffered from frequent production standstill due to broken belts or maintenance work. The high impact and the huge load took its toll on the belts and motor bearings. Any maintenance intervention was time consuming and required three staff to execute the work. Subsequently the quarry suffered from reduced productivity.
THE SOLUTIONAfter a thorough analysis the client decided to invest in a ROSTA motor base MB. Short after the installation a significant improvement was noticed. Not only lasted the belts four times longer but also the regular re-ten-sioning was not required anymore. The frequent unex-pected production stops where no longer a threat to the productivity. The ROSTA MB 70 × 800 compensates shock loads which occur with every new rock dropped in the crusher and therefore prevents the belts form tak-ing up all these loads like they do in a rigid installation. Additionally, the frequent re-tensioning and the realign-ment of the pulleys are no longer need. Once an MB is aligned there is no need for re alignment.
PRODUCTS USEDThe used ROSTA element is MB 70 × 800. This unit is a self and automatic tensioning motorbase for belt drives. It offers compensation of belt elongations which results to increased drive efficiency and eliminating downtime. Further-more no re-alignment is need-ed, dampens peak- loads and offers longer service life of all drive components.
Maintenance ManagerGórnicze Zakłady Dolomitowe S.A.
The ROSTA motorbase increas-es our productivity greatly, as the constant interruptions caused by the maintenance of the belts could be re-duced to a minimum.
