For the last seven years, Liebherr has been manufacturing the world’s largest and most efficient mining truck – the T 282 B (Fig.). This 363 tons payload truck has set benchmarks worldwide for high production and low fuel consumption. Over that time, there have been numerous design improvements to increase the efficiency and reliability of the truck. However, recent improvements have re-sulted in a substantial evolution of the product and a change in name from T 282 B to T 282 C. With a new cast frame, axle box and cab, and a drive system that was designed and built by Liebherr, the T 282 C now has a designed reliability with a focus on Liebherr Vertical Integration. At the 2010 bauma, the new T 282 C has been presented in public for the first time. With an empty vehicle weight (EVW) of 237 t, the T 282 C can carry a payload of up to 363 t. Available engine options for the T 282 C include the MTU DD 20V4000 (20-cylinder/2800 kW/3755 hp) or the Cummins QSK 78 (18-cylinder/2610 kW/3500 hp). Its top speed is 64 km/h (40 mph).
The Liebherr Vertical Integration philosophy incorporates proprietary truck components, specifically developed to serve the needs of the mining industry. By being in control of all components of the drive system, innovative design solutions can be developed within the Liebherr group to accommodate operations with high altitudes, high ambient temperatures and other unique mining applications. The largest and one of the most important structures on any mining truck is the truck frame. It is upon which the truck’s dump body, superstructure and power module rest. The new T 282 C frame is unique. It utilizes strategically located castings only in high stress areas and subsequently maximize its payload and production potential. With an elimination of all stress concentrations, a reduced chassis weight from the previous generation frame and no compromise in durability, the T 282 C frame is designed for reliability. In addition to the new frame, a completely redesigned axle box is now available with the T 282 C. The new axle box now has two service doors, improved cable routing, vertical linkage and greater air flow across the electric drive motors and service brakes. With both increased service accessibility and better airflow, especially in high altitudes and ambient temperatures, the T 282 C’s axle box has been redesigned for reduced downtime and increased reliability.
In an ultra class mining truck, the operator environment is a major area of concern. Some of the cab’s major upgrades include new dash display gauges and a 12“ integrated color touch screen for all operator alerts, faults, warnings, cameras and other control functions. In addition, the cab now features more amenities including an increased number of vents for air circulation, increased width for greater interior space, three point seat belts and larger dual cup holder for operator comfort and convenience.
Another technical step forward and major part of Liebherr Vertical Integration is the new Liebherr drive system with IGBT frequency inverters. Together with the Liebherr regulating system, the liquid-cooled IGBT power modules optimise control of the traction motors. The frequency inverters for auxiliary equipment are supplied with electrical energy regenerated, if circumstances permit, when the vehicle is braked. The new system includes wheel motors and planetary gear sets developed by Liebherr. It guarantees that the diesel engine runs independently of travel speed and its fuel consumption can therefore be optimised. The only deciding factor is the performance called for in any particular application.
Liebherr Mining Equipment Co.,
Newport News, VA (USA),
Tel.: +1 757 245 5251,