Topological structure of multi-stage impeller type magnetic suspension pump set with two suspension fulcrums and three protection fulcrums

The invention provides a multi-stage impeller type magnetic levitation pump set topological structure with two levitation fulcrums and three protection fulcrums. The structure is composed of a motor 1, a multistage pump 2, an axial magnetic bearing 3, a radial magnetic bearing, a protective bearing, a rotating shaft 9, a filter 10 and the like. According to the structure, parts such as a mechanical seal and a coupler in a traditional pump set structure are omitted, a motor shaft and a pump shaft are integrated, two suspension fulcrums and three protection fulcrums are adopted for overall suspension and protection of a rotor, and non-contact supporting of the rotor is achieved. Based on the compact structural form of the multi-stage impeller type pump set, the axial length of the pump set is effectively reduced, and the integration level of the whole device is remarkably improved. 本发明提供了一种两悬浮支点三保护支点多级叶轮式磁浮泵组拓扑结构。该结构其由电机1、多级泵2、轴向磁轴承3、径向磁轴承、保护轴承、转轴9、过滤器10等组成。该结构取消了传统泵组结构中的机械密封、联轴器等部件，将电机轴与泵轴集成，采用两悬浮支点、三保护支点对转子进行