June 29, 2010
June 28, 2010 – The new EVO Series of track-mounted, mobile impact crushers from Kleemann constitutes the next generation of impact crushers, and drew attention at the EVO introduction at bauma 2010 in April in Germany.
Kleemann sets new standards with its new MR 110 R EVO and MR 110 Z EVO, and MR 130 R EVO and MR 130 Z EVO mobile impact crusher plants. EVO represents a genuinely new evolution for the entire plant spectrum in terms of performance, economic efficiency and equipment longevity.
New Material Flow Concept
The new EVO concept matches refinements for all individual components with a new material flow concept. The new, highly efficient material flow concept of the EVO models eliminates all restriction to the flow of the material throughout the entire plant.
For example, the discharge chute under the crusher is 4 in. wider than the inner width of the crusher, and the subsequent discharge belt is another 4 in. wider than the discharge chute. Material is thus transported quickly and carefully away from the critical area under the crusher, with flow rate increased, and wear reduced.
Even before the crushing takes place, there is an improvement in the material flow, thanks to the system widths of the feeder troughs and grizzly that facilitate flow of the material through the opening of the crusher.
The independent and effective vibrating double-decker pre-screen, a Kleemann “specialty,” improves the EVO models’ impressive cost efficiency. In the EVO plants, vibration of the pre-screen and vibrating feeder below the crusher have been improved. Together with the newly designed crusher bypass – which features changes to both form and geometry – the entire system has been relieved of load and a significant contribution has been made not only to increased performance, but long-term life of the EVO models.
Optional new and improved screening units – now simpler and faster to assemble and disassemble – are available. These screening units now are significantly bigger, by over 44 percent on the MR 110 EVO compared to its predecessor. With its significantly increased screening area, this allows EVO models to deliver considerably higher overall tonnages of between 350 or 450 tph (MR 110 EVO and MR 130 EVO, respectively).
New Inlet Geometry
The advantages to EVO technology don’t stop there, however. The new crusher features highlights such as a new inlet geometry which allows even better penetration of the material into the range of the rotor. Also, the wear behavior of the new C-form impact ledges has been improved to such an extent that the edges remain sharper longer, leading to improved material shape. The rotor ledges are held securely by a new and extremely user-friendly clamping system, which means that they can be changed even quicker, and thus contribute to greater plant uptime.
Outstanding performance is made possible in part by the extremely efficient direct drive with which both machines are equipped. A latest-generation diesel engine transmits its power almost loss-free directly to the flywheel of the crusher, via a robust fluid coupling and V-belts. This drive concept enables enormous versatility, as the rotor speed can be adjusted in four stages to suit different processing applications.
Also, the newly developed and fully hydraulic adjustment capability of the crushing gap permits greater plant uptime, while improving quality of end product. Not only can the crushing gap be completely adjusted via the electronic control unit, but the calculation of the zero-point is possible while the rotor is running. This ability to accurately set the crusher aprons from the control panel saves time, and improves the overall efficiency and handling of the crusher.
Further improvements include the new touch screen control unit, which allows the operator to run the crusher and diagnose faults with a user-friendly control screen.
Wirtgen America, Inc., Nashville, is the North American arm of the Wirtgen Group, the single-source marketer of the world’s most technologically advanced lines of asphalt reclaiming and recycling equipment from Wirtgen, asphalt and soil compactors from Hamm Compaction Division, asphalt pavers from Vögele America Inc., and construction materials processing equipment from Kleemann.
In late 2004 Reinhard Wirtgen, founder of Wirtgen Group, was honored as one of the “Top 100 Private Sector Transportation Design & Construction Professionals of the 20th Century” by the American Road & Transportation Builders Association (ARTBA).