Experimentální problémy nových konstrukcí přenosných ponorných čerpadel pro důlní těžbu s elektrickým motorem chlazeným vodním pláštěm

摘要

The article presents a new construction of a submersible pumping engine where new original solutions in flowing system and control system where introduced It let obtain high efficiency and fulfill user’s expectations. The article also contains experiments of the new pumping engine and their results. The results of numerical analysis of the movement of liquid in flowing channel is described and the analytical characteristics are compared with ones measured in laboratory. The work also presents the problems with constructing, research and certification of new submersible pumping engine which construction fulfils ATEX requirements for machines working in explosive conditions areas