选隙自吸法为了将普通带底阀的离心泵改成效率不比原来低(甚至比原来高)的自吸泵,我们经过多年研究,终于探索出一种既能将普通离心泵改成高效自吸泵又能设计新型高效自吸泵的独特方法—选隙自吸法。选隙自吸法是利用优选法和正交试验法,通过在水泵蜗壳隔舌处涂HNT耐磨涂层或粘一定形状的金属自吸元件,来优选隔舌与叶轮间隙、隔舌形状和安放角等因素,从而为将普通离心泵改成高效自吸泵或为设计新型高效启吸泵提供一组最佳参数。 Gap self-priming method In order to ordinary centrifugal pump with a valve at the bottom of the efficiency is not lower than the original (even higher than the original) of the self-priming pump, after years of research, we finally explored a can not only ordinary centrifugal pump into efficient Self-priming pump can design a new type of highly efficient self-priming pump unique way - stripping self-priming method. Gap self-priming method is the use of optimization and orthogonal test method, through the pump volute tongue coated with HNT wear-resistant coating or a certain shape of the self-priming metal stick to the tongue and the impeller clearance, tongue shape and Placement angle and other factors, so as to ordinary centrifugal pump into a highly efficient self-priming pump or pump for the design of a new type of efficient high-lift pump to provide the best set of parameters.