Vehicle OEM Keestrack used this week’s Bauma China 2016 to showcase two new jaw crusher machines, the H4e and B4e, which are part of a new fuel-saving plug-in product line.
The Keestrack crushers, screeners and stackers are ‘e-versions’ of conventional diesel-hydraulic units. They have onboard diesel engines but also a plug-in-option, which means they can be powered externally via the mains, by another machine in the processing line, or via a separate gen set.
The e-versions have up to 30% lower fuel consumption compared with the same models with modern load-sensing hydraulic systems. Smaller hydraulic networks also minimize the risk of leakage, which is particularly important for operations in protected areas. It also avoids production downtime.
Lower oil volumes prevent temperature problems and fewer filters and coolers reduce maintenance. And even the service life of onboard diesels can be extended significantly, when the engines run under lower and more regular loads or only have to be started to move the tracks.
“Our e-versions give the customer the choice and freedom to start the engine and work conventionally wherever and whatever the job is. But if there’s mains available, or an external gen set makes sense, why not bring down [the] diesel rev to zero, reducing fuel costs instantaneously and boosting the live-time profitability of your machinery investments?” said Keestrack owner Kees Hoogendoorn.
The 35-metric ton Keestrack H4 machine has an innovative compact frame design that features an electrically driven cone crusher. Optional one-deck pre-screen and three-deck after-screen modules convert it into a highly efficient but very compact secondary or third stage production plant. The full hybrid H4e version debuted at Bauma 2016.
According to emission regulations, both machines feature 328/346kW onboard diesels powering the 330 kVA onboard generator for the crusher drive and ancillary components (side conveyors, magnet, etc.). For full electric operation from mains or external gen set the new H4e is equipped with an additional electric motor/hydro pump unit to supply the hydraulic driven feeder, the large after-screen module, the tracks, and all hydraulic cylinders.
The brand-new tracked mobile jaw crusher Keestrack B4/B4e operates on a similar principle. It is completely re-designed and follows the successful Apollo/B4, which for years set industry standards with high production rates in flexible recycling applications or medium-sized quarry operations.
Accordingly, the new frame structure incorporating elements of high-strength Domex steel qualities guarantees low transport weights (42-49 metric tons) and good static properties on site. Optionally the B4/B4e can be now equipped with a one-deck afterscreen module with oversize and recycling conveyors.
November 25, 2016
