Electric motor pump with axial-flow impellers
AssigneeToshiba Tec Kabushiki Kaisha
InventorsToshiyasu Takura, Yoshifumi Tanabe
Life of this patent
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Abstract
An electric motor pump with axial-flow impellers includes an electric motor having an output shaft both end portions of which are connected to axial-flow impeller units, and a pair of pump housings provided on both sides of the motor in the longitudinal direction of the output shaft and including fluid inlet and outlet ports, the pump housings cooperating with the impeller units to suck fluid into the housings through the inlet ports, move the fluid in the longitudinal direction and discharge the fluid from the outlet ports, thrust forces applied to the output shaft by the impeller units are canceled.
Claims7
An electric motor pump with axial-flow impellers, comprising:
- a pair of axial-flow impeller units;
- an electric motor including an output shaft having both end portions connected to the pair of axial-flow impeller units, radial bearings for rotatably supporting the output shaft, and a mechanism for rotating the output shaft;
- and
- a pair of pump housings provided on both sides of the electric motor in the longitudinal direction of the output shaft and including fluid inlet and outlet ports, the pump housings cooperating with the pair of the axial-flow impeller units to suck a fluid located around the electric motor pump into the housings through the inlet ports, move the sucked fluid in the longitudinal direction and discharge the fluid from the outlet ports, thereby mutually canceling thrust forces along the longitudinal direction applied to the output shaft by the axial-flow impeller units in the longitudinal direction.
Dependencies are inferred from the claim text.