公开(公告)号：US20150017031A1

公开(公告)日：2015-01-15

申请号：US14368852

申请日：2012-12-19

Applicant: Grundfos Holding a/s

Inventor： Thomas Blad

IPC: F04D13/06 ,  F04D29/041 ,  F04D29/049 ,  F04D29/16

CPC classification number: F04D13/0633 ,  F04D13/06 ,  F04D29/041 ,  F04D29/0413 ,  F04D29/042 ,  F04D29/0473 ,  F04D29/049 ,  F04D29/167

Abstract: A pump assembly includes an electric drive motor having a stator and a permanent magnet rotor, at least one impeller connected to the rotor via a rotor shaft, a thrust bearing accommodating axial forces acting on the impeller and rotor shaft in operation, and at least one radial bearing arranged on the rotor shaft. The rotor and stator are designed such that a magnetic axial force, acting in the direction of the rotation axis of the rotor and acting on the rotor in the direction of the inflow direction into the impeller, is produced between the rotor and the stator. The rotor shaft and rotor are mounted displaceably in the axial direction relative to the stator, and with an axial displacement of the rotor shaft in the inflow direction into the impeller, the bearing surfaces of the radial bearing lying opposite one another at least partly disengage.

Abstract translation: 泵组件包括具有定子和永磁转子的电驱动马达，经由转子轴连接到转子的至少一个叶轮，承载作用在叶轮上的轴向力和运行中的转子轴的推力轴承，以及至少一个 径向轴承布置在转子轴上。 转子和定子被设计成使得在转子和定子之间产生沿着转子的旋转轴线的方向作用在转子上的沿着流入方向的叶轮中的磁力轴向力。 转子轴和转子相对于定子在轴向上可移动地安装，并且随着转子轴在流入方向上的轴向位移进入叶轮，径向轴承的相对的轴承表面至少部分脱离。