DS-MAR24-PG24_Layout 1 20/03/2024 09:15 Page 1
FEATURE
DRIVES, CONTROLS & MOTORS
DRIVING CONSTRUCTION MACHINERY
SBM Mineral Processing (SBM), a member of the international MFL Group, relies on drive systems from WEG for the conveyor belts in its mobile mixing plants. Here we find out why
S
BM Mineral Processing (SBM) specialises in the development and production of concrete mixing plants,
and in processing and conveying systems for the natural stone and recycling industries. The Austrian company is a full-service supplier in the ready-mixed and prefab concrete sector and has both mobile and stationary concrete mixing plants in its product line. One of the company’s solutions is the supermobile EUROMIX 400C unit, which features its own electrical generator for fully autonomous operation. Compact and powerful, this is being used by Dutch recycling company Van Gansewinkel to process materials such as excavated soil, bottom ash, sludge and sieved sand, into concrete suitable for long-term storage. The plant operates in continuous operation with an effective production capacity of more than 400 tonnes of concrete per hour. For the 400C model as for other EUROMIX plants, SBM relies on geared motors from WEG for the conveyor belt drives.
ROBUST EQUIPMENT Several conveyor belts with reliable drive systems are necessary for smooth operation of the concrete mixing plant. The aggregate is weighed and dispensed according to the desired concrete grade and fed to the steep- angle conveyor belt, which transports the material to the double-shaft mixer. Cement, water and additives are fed directly
into the mixer, with the resulting concrete taken away by lorry or by ready-mix concrete trucks. The geared motors therefore need to withstand
extreme operating and environmental conditions, high availability and optimal plant use, as well as humidity and extreme dust loading. Particularly for motorway or tunnel
construction, a continuous supply of concrete is essential, so robust and reliable equipment is
24 DESIGN SOLUTIONS MARCH 2024
needed. In addition, the compact design and high mobility of the EUROMIX 400C also requires low- profile gear units with flexible mounting options.
DRIVE TECHNOLOGY The SBM mixing plants feature a range of drive technology from WEG, including various types of gear units from the K Series with torque ratings from 2,700 to 20,000 Newton meters (Nm). The EUROMIX 400C also has a pair of helical bevel geared motors, type KUA 85A 70 134M4, rated at 7.5 kilowatts (kW) for the two dispensing belts and an angle parallel shaft geared motor, type CSA 80A 70 161M4, rated at 11 kW for the steep-angle conveyor belt. The compact, structurally optimised housing of the helical bevel geared motors has efficiency class IE2, speed 22 revolutions per minute (rpm) at 50 Hertz (Hz), torque 3,274 Nm, controlled by frequency inverters and housing in UNIBLOCK design provide flexible mounting options. The K series gear units offer rapid, adaptable solutions to tailor to specific customer needs. Collaborating with SBM, WEG customised drives suit environmental conditions and individual requirements for the EUROMIX 400C. Specifically designed for this application, the helical bevel and angle parallel shaft geared motors feature special functions like humidity protection, condensation bores, PTC temperature control, forced ventilation and protective covers. The angle parallel shaft geared
motor also includes a modular backstop for added protection, preventing reverse motion of the steep-angle conveyor belt during power outages.
RELIABILITY The combination of high operational
reliability and outstanding versatility makes the modular drives units from Watt Drive an optimal solution for flexible, demanding applications like the EUROMIX 400C. A current project employing the combination of SBM concrete mixing plants and WEG technology is the 4.4-km Götschka Tunnel on the S10 motorway in Austria, which forms the traffic corridor between Linz and Prague. Here, three mobile EUROMIX plants, types 2000, 3000 and 4000, produced a total output of 300,000 cubic metres (m3
) of concrete
between spring 2012 and 2015. The plants operate around the clock regardless of season and weather, and thanks to its high- quality configuration they fulfil the demanding Austrian specifications for tunnel construction. WEG and SBM also partnered in the
construction of the S10 motorway in Austria, where a EUROMIX 4000 with conveyor belts powered by WEG motion drive technology produced concrete for the motorway substructure.
WEG
www.weg.net
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60
