The rise of minimal emissions machinery
A combination of increasing capability and evolving environmental legislation has fuelled the demand for efficient, minimal emissions machinery and has driven Sennebogen on to make strides with its E-series technology, writes Rebecca Jeffrey.
With the ability to handle 320t, a lifting capacity of 15t and a reach of up to 42m, Sennebogen's 330t 8400 EQ balance material handler uses a balance system and electric engine to achieve productivity while saving energy and operating costs. The machine is controlled with two cylinders, one for the lift and one for the stick. Its balance system is based on an equilibrium principle. A counterweight in the rear of the machine balances the equipment, including the grapple, via a coupling bar that runs parallel to the 32m boom.
The setup is intended to ensure that only the load lifted is moved so that minimal energy is required for operation with heavy working loads, high reaches and long ranges to achieve high efficiency. When lifting a load power only needs to be provided for handling the load in the grab. This has enabled the company to install a smaller engine than used in other classic hydraulic material handlers, explains Erich Sennebogen, co-owner of Sennebogen.
To meet emissions regulations, 8400 EQ has two European regulations compliant tier 4/5 160kW electric motors at 400 V/50/60 Hz, which, through the constant provision of power, make sure the machine’s hydraulic system is minimally loaded.
The smaller engine also means that a big network of electricity is not required. The 8400 EQ requires approximately 50% of the energy of a comparable diesel-powered machine. Mr Sennebogen says: “All the balance machines are driven by an electric engine which saves 50% of energy, service and operating costs in comparison to classic diesel engines. In total the EQ system and the electric drive lead to a maximum of 75 % fuel savings.”
8400 EQ also incorporates a walk-in powerpack linked to the engine and hydraulics and because the hydraulic lines are connected from the power pack to the machine, transportation and maintenance is made easier. Mobility of the electric handler is made easier still with the increasing use of electric plug-in stations at ports where machines can be charged and powered and moved around the port to load and unload ships.
To add to the machine’s environmental credentials, dust emissions are managed through counter rotation of the vents and the machines are mainly used with a pylon or gantry so their elevated status minimises the risk of on-ground generated pollution from dust.
The development of 8400 EQ, launched at the end of last year alongside the 9300E mobile port crane and the 870E material handler for ports, is a timely fit with increased capacity at ports. Mr Sennebogen explains: "Ports have always been a big segment for Sennebogen but over the last 10-20 years the size of machines has grown constantly. The ship size grew, the ports grew; we had to follow with different concepts and different machines.”
8400 EQ is currently in use by BMF Port Burgas, port operator at terminal Burgas East 2 and terminal Burgas West at the Port of Burgas in Bulgaria; and Alberton, which supplies concrete mortar and operates a mortar plant at its Amsterdam-Westpoort site at the Port of Amsterdam.
Alberton says that with their large capacity, energy-efficiency and a long-life span of their electric motors, the concept of the balancing crane fits in perfectly with the company’ sustainability policy.
It stresses that the machine is expected to help optimise the company's work processes and " forms the basis for an efficient, productive and sustainable logistics system."