Rotary piston pump, method for securing rotary pistons of a rotary piston pump and method for removing rotary pistons of a rotary piston pump

The invention relates to a rotary piston pump having at least two counter-rotating rotary pistons which are arranged in a pump space on drive shafts. The rotary pistons each have a recess for the drive shafts. The respective drive shaft is arranged and secured with an end region in the recess of the respective rotary piston. According to the invention, a diameter of the drive shafts can be widened elastically in the end region. In an operating state in which the rotary pistons are arranged on the respective drive shafts, a friction-fit is established between the respective recess of the rotary piston and the end region of the respective drive shaft. The invention also relates to a method for securing rotary pistons in a rotary piston pump and to a method for removing rotary pistons of an above-described rotary piston pump. 本发明涉及种旋转活塞泵，该旋转活塞泵具有在泵腔中布置在驱动轴上的相反环绕的至少两个旋转活塞。旋转活塞分别包括用于驱动轴的容纳部。相应的驱动轴以端部区域布置并固定在相应的旋转活塞的容纳部中。根据本发明，驱动轴在端部区域中的直径可弹性地扩宽。在旋转活塞布置在相应驱动轴上的运行状态中，在旋转活塞的相应容纳部和相应驱动轴的端部区域之间形成摩擦连接。本发明还涉及用于在旋转活塞泵中固定旋