Conveying
Expertise in Bulk Materials Handling
Customers are expecting drive companies to provide increasingly better performance combined with low energy consumption. Bosch Rexroth is meeting the challenge
B
ulk handling of materials is crucial for a range of industries. However, they all share similar engineering and technical aspects. Industries involved with extraction and mining as well as industries importing and processing raw materials have common needs. One of these requirements is the use of hydraulic, pneumatic and electrical systems to safely and efficiently drive and control the pro- cess of materials. High performance, low energy consumption, dynamics and out- standing control are just some of the properties a modern drive strategy must provide to meet increasingly high customer expectations. Bosch Rexroth, with its extensive product portfolio covering a wide range of disciplines, has identified itself as “The Drive & Control Compa- ny”. Over many years the team has developed expertise and experience in bulk materials handling and can provide a specialist knowledge and service to this sector. Although of great importance, service needs to be about much more than having a strong product portfolio. Over a number of years, Rexroth has been able to also develop systems and engineering expertise in addi- tion to systems build and testing facilities to satisfy all bulk materials handling application requirements. The application of products into customised, efficient and safe systems pro- vides added value to customers and can only be offered thanks to the many years experi- ence of extensive systems engineering and
14 June 2012 Solids and Bulk Handling
design. The acquisition of Hagglunds Drives earlier in 2011 has also added a comple- mentary product range and systems expertise for direct hydraulic drive systems including a wide range of modular Drive Units designed to suit many applications in standard form. Efficient and responsive aftersales services are vital to ensure that the systems are main- tained once commissioned, allowing them to run smoothly and safely for a number of years. Bosch Rexroth’s drive and control concept with power packs, cylinders, motors, gearboxes and electronics
Packaged direct hydraulic drive solutions. The LPDU here provides a cost effective low power drive solution.
requirements which inevitably depend on the application and the environment concerned. In Bosch Rexroth the following examples are typical in bulk material handling applications:
• Belt Conveyors - There are at least three areas for hydraulic systems on belt conveyors. The first concerns the main drive where smooth variable speed enables a good starting and stopping characteristic. The drive should be able to start with a full load and if downhill, be able to take variable regen- erative loads. A standard system with closed circuit hydraulic system will do this if powered from the grid. The belt tension system is also an impor- tant element to control the friction between belt and pulley to allow starting and running with variable loadings without slippage. Underground systems obvi- ously have to conform to appropriate standards. For example with skid type explosion proof design to suit ATEX.
are tailored to the application at hand, but consist of components from its standard product range. This guarantees international availability of spare parts and local service knowledge. Additionally, Bosch Rexroth’s regional Centres of Competence provide a network of system advisors who in partner- ship with Rexroth, provide comprehensive advisory service for specific customer issues.
THE SYSTEMS Power units are designed to suit customer
www.solidsandbulk.co.uk
Braking and auxiliary systems for clamp- ing and reeling are also often required. • Feeders - Often used for pulling raw material out of large storage hoppers and feeding out a controlled rate onto conveyors, railway wagons or sizers of various descriptions. Apron feed- ers are usually constructed from steel belts to provide the strength required for heavy duty work on large mine sites and quarries. Belt feeders are usually used for lighter materials and duties. • Bucketwheel reclaimers, ship
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