Title:
PUMP
Document Type and Number:
Japanese Patent JP2014231796
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a pump capable of preventing liquid leakage even when there is a pressure difference between a rotor chamber and the outside.SOLUTION: In a pump 1, a rotor 3 is separated from a stator 2 by a metallic first case 6 covering the rotor 3 from one side in an axis L direction (one side Z1 in a Z direction), and the first case 6 and a metallic second case 7 covering the rotor 3 from the other side in the axis L direction (the other side Z2 in the Z direction) are welded at the whole circumference, and the rotor chamber 10 is sealed. Accordingly, liquid leakage from a seal part can be prevented even when the pump 1 is used under the condition that the pressure difference is generated between the rotor chamber 10 (pump chamber 15) and the outside. By setting a rotational speed of the rotor 3 to be 5000 rpm or less, generated eddy current is reduced even when the first case 6 and the second case 7 are made of metal, and adverse effects due to the eddy current can be suppressed.
Inventors:
AYUSAWA YU
YOSHIKAWA SHINICHI
YOSHIKAWA SHINICHI
Application Number:
JP2013113367A
Publication Date:
December 11, 2014
Filing Date:
May 29, 2013
Export Citation:
Assignee:
NIDEC SANKYO CORP
International Classes:
F04D5/00; F04D13/06
Domestic Patent References:
| JPS5768590A | 1982-04-26 | |||
| JPH0592493U | 1993-12-17 | |||
| JPH1077982A | 1998-03-24 | |||
| JP2011088203A | 2011-05-06 | |||
| JP2014141913A | 2014-08-07 | |||
| JP2011507280A | 2011-03-03 | |||
| JP2011171078A | 2011-09-01 | |||
| JPS62176500U | 1987-11-09 | |||
| JPH0842484A | 1996-02-13 | |||
| JP2008223659A | 2008-09-25 | |||
| JP2011085027A | 2011-04-28 | |||
| JPH0532789U | 1993-04-30 | |||
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Foreign References:
| US20100111730A1 | 2010-05-06 |
Attorney, Agent or Firm:
Shiro Yokozawa
Kodaira 晋
Kawai 徹
Nobuko Kawaguchi
Kodaira 晋
Kawai 徹
Nobuko Kawaguchi