According to the formation principle of the tritubercular cycloid in this paper, the rotor, whose bore curve is the inner envelope line of the cycloid, is made with the solid radius vector.

根据三尖线的形成原,线的内包络线定子内腔曲线,体化后作转子,定子、转子按照一定关系运则形成一种新型线泵。