Method for reducing the pressure pulsation of a positive-displacement pump, in particular a screw pump, and a screw pump designed according to this method

摘要

In the case of a positive-displacement pump, in particular a screw pump, the troublesome pressure pulsation is to be avoided. To this end, a method is proposed in which the characteristic pulsation present is superimposed by a forced inverse pulsation. To this end, the screw pump according to the invention has a stop with an outlet to the suction side, which stop is periodically open or covered as a function of the rotary position of the screw spindles.