Water pump including supporting structure for impeller

Patent metadata

Field	Value
Publication number	US-11035373-B2
Application number	US-201916523982-A
Country	US
Kind code	B2
Filing date	Jul 26, 2019
Priority date	Jul 27, 2018
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

Provided is a water pump including a supporting structure for an impeller having a lower manufacturing cost and having reduced noise and vibration characteristics compared to a conventional water pump including a supporting structure for an impeller. The water pump including a supporting structure for an impeller includes: a shaft; an impeller having the shaft inserted into a center of the impeller and rotating together with the shaft to discharge an introduced fluid; a core formed on an outer circumference of the shaft; a magnetic material formed on an outer circumference of the core and forming a magnetic field rotating the shaft connected to the core and the impeller; a pump housing the shaft, impeller and core; and a supporting member installed between an end of the shaft and the pump housing to support the shaft.

First claim

The invention claimed is:

1. A water pump including a supporting structure for an impeller, the water pump comprising:
a shaft;
the impeller having the shaft inserted into a center of the impeller and rotating together with the shaft to discharge an introduced fluid;
a core formed on an outer circumference of the shaft;
a magnetic material formed on an outer circumference of the core and forming a magnetic field rotating the shaft connected to the core and the impeller;
an upper housing;
a lower housing assembled to the upper housing and housing the shaft, the impeller, and the core therein with the upper housing;
a first support installed between an upper end of the shaft and the upper housing, and in contact with the shaft to support the shaft;
a second support installed between a lower end of the shaft and the lower housing, and in contact with the shaft to support the shaft;
an upper supporting structure formed in the upper housing to house the first support and the upper end of the shaft; and
a lower supporting structure formed in the lower housing to house the second support and the lower end of the shaft;
wherein when at least one of the first support and the second support has a curved surface in contact with the shaft, one end of the shaft in contact with the curved surface is flat, and
wherein when at least one of the first support and the second support has a flat surface in contact with the shaft, one end of the shaft in contact with the curved surface is curved.

2. The water pump including the supporting structure for the impeller of claim 1 , further comprising a bearing provided between at least one of the upper supporting structure and the lower supporting structure and an outer circumference of an end of the shaft.

3. A water pump including a supporting structure for an impeller, the water pump comprising:
a shaft;
the impeller having the shaft inserted into a center of the impeller and rotating together with the shaft to discharge an introduced fluid;
a core formed on an outer circumference of the shaft;
a magnetic material formed on an outer circumference of the core and forming a magnetic field rotating the shaft connected to the core and the impeller;
an upper housing;
a lower housing assembled to the upper housing and housing the shaft, the impeller, and the core therein with the upper housing;
a first support installed between an upper end of the shaft and the upper housing, and in contact with the shaft to support the shaft;
a second support installed between a lower end of the shaft and the lower housing, and in contact with the shaft to support the shaft;
an upper supporting structure formed in the upper housing to house the first support and the upper end of the shaft; and
a lower supporting structure formed in the lower housing to house the second support and the lower end of the shaft;
wherein at least one of the first support and the second support is a spherical ball, and between the lower supporting structure and the upper supporting structure a partial inner portion of the upper and lower supporting structures housing a ball has a curved shape corresponding to a curved surface of the ball to house the ball.

4. The water pump including the supporting structure for the impeller of claim 3 , further comprising a bearing provided between at least one of the upper supporting structure and the lower supporting structure and an outer circumference of an end of the shaft.

Assignees

• Coavis

Inventors

• Pae Wan Sung
• Lee Hyun Tae
• Kim Joon Seup

Classifications

• F04D13/06

  the pump being electrically driven · CPC title

• F04D29/046 Primary

  Bearings · CPC title

• F04D29/669

  especially adapted for liquid pumps (F04D29/18 takes precedence) · CPC title

• F04D1/00

  Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps (adapted for pumping specific fluids F04D7/00; priming or boosting F04D9/00) · CPC title

• F04D29/04 Primary

  Shafts or bearings, or assemblies thereof (specially adapted for elastic fluid pumps F04D29/05) · CPC title