NOVELTY - The device has a shaft (14) provided for discharging a mechanical energy i.e. torque, and a drive (30) connected with shaft sections by using couplings, where the shaft sections are diametrically opposite to each other. The drive has a wheel that is provided with weights arranged on the circumference of the wheel, where the weights are movable in a radial direction by using piston-cylinder-units based on a rotating position. The cylinder-units are designed as telescope units and arranged at a ring flange that surrounds the shaft, where the weights are supported by longitudinal guides.    USE - Energy producing device i.e. main drive, for driving a generator of a power station e.g. solar power station, wind power station and hydroelectric power station, for generating an electric current for hydrolysis in a system e.g. fermentation container, that is utilized for manufacturing hydrogen to supply a fuel cell (all claimed) e.g. hydrogen fuel cell and oxygen fuel cell, of a motor vehicle, for processing of red wine slurry, for a fermenter in a biogas-system, in a food technology, for manufacturing gelatin, in an environmental engineering for waste processing, in diverse chemical process and during processing of textiles. Can also be used for generating the electric current for public, commercial and official consumers e.g. residential house, hospital, school, office, enterprise and bank.    ADVANTAGE - The wheel has the weights arranged on the circumference of the wheel, where the weights are movable in the radial direction by using piston-cylinder-units based on the rotating position, such that the energy can be generated, without the need for primary energy. The device can be designed in a compact and cost-effective manner, such that the device can be used in any places e.g. hall and cellar room. The device can be driven in a simple manner, so that the undesirable downtime of the drive during the overloading of the drive can be prevented.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic partial sectional view of a device as a main drive for a fermentation container.    Fermentation container (10)    Stirring unit (13)    Shaft (14)    Inner area (19)    Drive (30)