Abstract: A device converts mechanical energy to other forms of energy, preferably to electrical energy. The device referred to as a flow converter has been configured such that a rotating turbine cone set into motion by a flow medium has spiral-shaped impeller blades disposed on the circumference thereof and is supported relative to a fixed housing by a main bearing. The device is sealed by slip ring seals, axial shaft end sealing rings and radial shaft end sealing rings such that units for efficiently converting rotary speed and converting energy can be located in a hollow space created thereby and can be effectively protected against penetration of the flow medium. Flow material can be discharged by the structure of the flow converter, and large power levels can be transferred.