Micro-axial pump with press-fit impeller

Abstract

An axial pump for delivering liquid coolant to cool an electronic device comprises a conduit, an impeller in the conduit, a shaft, a rotor, and a motor stator. The conduit defines a flow path from an inlet of the conduit to an outlet of the conduit. The rotor is disposed in a hollow interior of the impeller and comprises magnetic portions, a front bearing housing, and a rear bearing housing. The front and rear bearing housing comprising bearings rotatably coupling the rotor to the shaft. The motor stator is configured to drive rotation of the rotor about the shaft, with the impeller rotating along with the rotor about an axis of rotation extending parallel to the flow path. The rotor is coupled to the impeller by a press-fit attachment of the front bearing housing to the impeller.