BAUMA PREVIEW
The 280 SM ( i ) is an “ all-rounder ” for all rock hardnesses and applications , Wirtgen says
depth with consistently high precision and without further aids .
The 280 SM ( i ) is an “ all-rounder ” for all rock hardnesses and applications , Wirtgen says . The 2,750 mm cutting drum unit , with a cutting depth of up to 650 mm , is precisely adaptable to each specific application and achieves outstanding cutting performance with minimal pick wear , it added .
Wear-resistant toolholder systems ensure optimal pick utilisation and minimal downtime .
While the soft-rock cutting drum unit is designed for high material flows in soft rocks , the hard-rock cutting drum unit ensures maximum durability and long life in hard-rock applications , according to Wirtgen .
The hydraulically , height-adjustable rear discharge conveyor with a movable counterweight can be slewed to the right and left by 90 ° and enables the loading of mining trucks with payloads of up to 100 t . Whats ’ more , the operator can continuously vary the speed of the belt independent of the engine speed to reduce belt wear dependent on the material volume and the size of the mined material .
Entirely new standards are set by the dustsealed and air-conditioned , positive-pressure cabin on the new surface miner with fresh air filtration . This , the company says , prevents the ingress of dust into the operator ’ s workplace .
Mounted on the front left chassis column , the operator ’ s cabin has all-round glazing and is decoupled from the machine body to offer 90 ° rotation in both directions . Up to six cameras can also be installed to provide even better all-round vision , while various automated functions further contribute to operator comfort . This potentially reduces the risk of fatigue , assists the operator in achieving high productivity rates and improves the overall efficiency of the process , the company says .
Thanks to the reduction of carbon emissions by low specific fuel consumption , an efficient water management system and effective solutions for the minimisation of dust pollution , the 280 SM ( i ) shows that ecological and economic considerations are compatible and closely interconnected , Wirtgen concluded .
Moving to drive mode
After launching Generation X . e in 2019 , SEW- EURODRIVE says it is once again setting new technology standards .
The helical and bevel-helical gear units of the X . e series cover a torque range from 6.8 to 475 kNm across 23 graduated sizes .
Digital data models and the latest calculation methods have laid the foundations for a further improvement in the performance of its Generation X . e series . Among the benefits that come with this update are a higher thermal limit rating , a longer bearing service life , and higher nominal and application torques . Moreover , larger application angles are permissible with the maximum overhung load .
One potential result of this optimisation is a smaller gear unit size . Besides reducing the oil volume , energy consumption and total cost of ownership , this also means the units are lighter and take up less space in the plant . Particularly in the case of drives that are subject to high loads , mechanical safety – and , thus , the potential for preventing damage – is also further improved . What ’ s more , a lower oil-bath temperature and a higher bearing service life mean reduced unplanned maintenance .
These same gear units , to be displayed at Bauma , are part of the company ’ s “ Industrial gear units to go ” program for shorter delivery times , aiming to supply SEW-EURODRIVE industrial gear units to customers even faster .
This sees standard drives from the X . e – up to 175 kNm – and P series – up to 360 kNm – leave the plant just five working days after receiving an order . Gear units that require design adaptations – such as special output shafts or preparation for use at low temperatures – are ready for shipping within 15 working days .
In terms of hardware , the company will also be talking up the introduction of new line-operated DRU .. series asynchronous motors in the IE4 energy efficiency class in Munich .
The new IE4 AC motors with 4-pole design will be available in a power range of 0.75 kW to 200 kW and can be combined either directly with SEW gear units , or as standalone motors in all footmounted and / or flange-mounted designs .
The launch takes place ahead of the July 1 , 2023 deadline stipulated in the third stage of the European ecodesign regulations for motors , ( EU ) 2019 / 1781 and ( EU ) 2021 / 341 .
Still along the lines of sustainability , the Bruchsal-based drive specialist recently introduced GearFluid , a premium lubricant for
Among the benefits that come with this update to the X . e series of helical and bevel-helical gear units are a higher thermal limit rating , a longer bearing service life , and higher nominal and application torques
38 International Mining | SEPTEMBER 2022