Centrifugal pump with outlet flow passage of increasing cross-section

Patent metadata

Field	Value
Publication number	US-8939719-B2
Application number	US-95441710-A
Country	US
Kind code	B2
Filing date	Nov 24, 2010
Priority date	Nov 27, 2009
Publication date	Jan 27, 2015
Grant date	Jan 27, 2015

Abstract

A centrifugal pump includes a motor having an output shaft, a volute mounted at one side of the motor and an impeller which is located inside the volute and attached to the output shaft. The volute has an inlet arranged along the axial direction, an oulet arranged along the lateral direction and a flow channel arranged along the circumferential direction. The flow channel has a spiral shape. The cross-sectional area of the flow channel increases towards the outlet.

First claim

The invention claimed is:

1. A centrifugal pump, comprising:
a motor having a shaft;
an impeller attached to the shaft of the motor; and
a monolithic volute comprising:
a chamber enclosing the impeller;
an inlet along an axial direction of the shaft of the motor and communicating with the chamber;
a spiral flow channel communicating with the chamber and having a spiral inner wall with a decreasing radius of curvature between a first end and a second end along a flow direc…

Assignees

• Wan Ying Juan
• Tang Long Hing
• Johnson Electric Sa

Inventors

• Wan Ying Juan
• Tang Long Hing

Classifications

• A47L15/4225

  Human Necessities · mapped topic

• D06F39/085

  Textiles & Paper · mapped topic

• F04D29/426 Primary

  Mechanical Engineering · mapped topic

• D06F2103/48

  Textiles & Paper · mapped topic