Circulating pump for cooling water to be forcibly circulated

Details Circulating pump for cooling water to be forcibly circulated Circulating pump for cooling water to be forcibly circulated

1996-01-02

1997-04-29

Thorpe, Timothy S.

Pumps

Motor driven

Including means utilizing pump fluid for augmenting cooling,...

F04B 3906

Patent

active

056242441

ABSTRACT:
The present invention relates to a circulating pump for pressurizing and circulating fluid in a system such as a boiler. An object of the present invention is to provide an improved structure of an impeller body and a motor shaft so that a substance such as mud is prevented from being accumulated in a motor while the motor is sufficiently cooled. The circulating pump comprises a motor, an impeller and a pump housing. At the outer surface of motor shaft a spiral groove is formed and at the center of motor shaft a cooling water discharging passage is formed along the axis of the motor shaft. At a lower portion of an impeller body a curved projecting portion forming a cooling water inflow chamber by joining together with motor shaft is provided and a plurality of cooling water outlet holes are formed therein. At an upper end of cooling water discharging passage a ball seat with a ball therein is provided. Fluid pressurized into in the inpeller chamber by the impeller returns into the impeller through a spiral groove and cooling water discharging passage of the motor shaft under the action of pressure difference of fluid between the impeller chamber and the impeller and rotation of the spiral groove.

REFERENCES:
patent: 2592612 (1952-04-01), Smith, Jr.
patent: 2936715 (1960-05-01), Southam et al.
patent: 3420184 (1969-01-01), Englesberg et al.
patent: 3967915 (1976-07-01), Litzenberg
patent: 4990068 (1991-02-01), Zhong et al.
patent: 5248245 (1993-09-01), Behnke et al.
patent: 5464333 (1995-11-01), Okada et al.

Affiliated with

Also associated with

Rating

Circulating pump for cooling water to be forcibly circulated does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Circulating pump for cooling water to be forcibly circulated, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circulating pump for cooling water to be forcibly circulated will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-701546