Centrifugal pump with flow deflecting rim - suitable for central heating plant, cavitation noise is almost eliminated

摘要

At the circumference of the pump rotor (9) or on the pump housing surrounding the rotor, a rim (11) is provided which deflects the flow of fluid axially. The transfer of velocity-head to pressure-head in the pump is achieved within the pump rotor and during the flow past the deflecting rim. The pump medium leaves the pump without local pressure fluctuations which are usually the cause of pump noise. The rim round the rotor overlaps the rotor outlet completely or partially. The edge of the rim is parallel to the centreline of the rotor.