US1163242A

US1163242A - Centrifugal pump.

Info

Publication number: US1163242A
Application number: US77941013A
Authority: US
Inventors: Ferdinand W Krogh
Original assignee: Individual
Current assignee: Individual
Priority date: 1913-07-17
Filing date: 1913-07-17
Publication date: 1915-12-07
Anticipated expiration: 1932-12-07

Description

F. W. KROGH.

CENTRIFUGAI. PUMP.

APPLICATION FILED IIILY I7. I9I3.

WITNESSES ATTO R N EY.

I". W. KROGH.

cENTmFuGAL PUMP.

APPLICATION FILED JULY I7. III3. v 1,163,242, Patented Deo. 7, 1915.

2 SHEETS-SHEET 2.

WITN ESSES ATTO R N EY.

. nu, M7@

` .To all whom t may] concern.'

ASamaras CENTRIFUGAL PUMP.

specification of Letters Patent.

rateateanee. 7,1915.

Application mea Juiy 17, 191s. serial No. ricain.`

Be it known that I, FERDINANp1W ..KnoGi I, of San Francisco, California, have invented certain new and useful Improvements in Centrifugal Pumps, whereof the following is a specification.

This invention relates to centrifugal pumps, not only those that are used for deep well pumping, but also contractors" pumps, such as areY used for keeping a place dry while work is progressing and also relates to certain features disclosed in my applicationjiled Jan. 6, 1913, Serial No. 740,299. The objects of the invention include; the balancing of the impeller; the easy removability and replacement of all parts subject to wear and the prevention 0f tools or other objects which may accidentally fall into the discharge from entering the body of the pump where they might cause damage.

To these ends the invention comprises a pump casing provided with a suction and a discharge, an impeller mounted therein and by its rotation causing the water to enter at the suction and pass out of the discharge;

a chamber at the upper part of theirnpeller,

closed by a diaphragm in the casing above the impeller, whereby leakage from the discharge entering said chamber causes a pressure therein and pushes the impeller toward the suction; ports in the diaphragm connect with a space above the same from which openings connect with the outside of the casing so that the water may be thrown through said ports and space and into the body of water outside the pump; a chamber beneath the impeller surrounding the suction thereof,

and connected with the discharge, whereby the pressure of the column of water in the discharge opposes the suction; a grating inthe discharge above the bodyof the pump; the making of said diaphragm and other parts easily removable; and including a removable bushing c at the suction orifice, whereby the parts subject to wear are easily replaced.

In the accompanying two sheets otv drawing, I have shown my invention as applied to a single unit pump, it being understood that it may be equally `applied to tandem pumps in which the several units may be identical with the one shown or otherwise.

In the drawings ,Figure 1 is a sectional elevation through the center of the pump.

Fig'. a top View ofthe casing showing the grating, and Fig. 3 is an inverted secj a pump connected by the Harige joints 2;

with a discharge 3, and/provided with a suc- 'tion 4 connected to it by the ange joint at 5. The pump may also be provided with a suction pipe 6, secured to it by the flange joint 7 when desired.

8 is the impeller mounted upon the shaft 9, andsharpened toward the suction end, as shown, to reduce the resistance of the inflowing water.

10 are the usual impeller arms, which need not be further described.

Under the impelleris a chamber 11 surrounding the suction and connecting with the discharge portion of the casing at 12, whereby the pressure ofthe water in the discharge acts upon the under side of the impeller, and tends to push it up away from the suction. j

The impeller includes a downward extending annular flange 13 forming the throat thereof, which partly enters into the suction orifice fand forms a connection therewith at all times in the movement of the impeller. Surrounding this flange 13 is a bushing 14, provided with a'flange portion 15, by which it may be secured tothe casing 4. The upper part of the impeller includes a longitudinal flange 16, and an inward extending transverse flange 17, which parts form a chamber 18 in the upper part of the impeller.

19 represents the bearing for the shaft 9 in the casing. At. the lowerredge of the bearing 19 there is a diaphragm 20, provided with a downward extending flange 21 at its periphery which embraces the ange 16 of the impeller. These parts are secured to to the hydrostatic head in the discharge,

tends to force the impeller up away from the suction, and into the position shown in Fig. 1;- While in lthis position, the leakage of Water through the joints betweeirthe im'v peller and the diaphragm 20, and its flange 21, produces a pressure in the chamber 18, and against the under side of the diaphragm i 20, and tends `to push the impeller away from the diaphragm. Such movement of the impeller opens the ports 23, and the water in chamber 18 is thrown out bythe centrifugal force., engendered by the rotation of the impeller, into the space 24, and thence through the channels 25, to the outside of the casing.

It will be observed that the parts subject to wear, aside` from the journals and bearings of the shaft, are the impeller; the diaphragm 20; the flange 21; and the bushing 14. These part are all easily gotten at for repair, or for removal andreplacement, by simply disconnecting the joints at 2 and 5.

The `above pump may be used by itself or as a member of a tandem, or series of pumps, and in the latter case it may be the initial pump of the series or tandem, or one of the other pumps thereof.

Having thus described my invention and believing I have produced useful and novel improvements in the art to which it appertains, let it be understood that I do not wish to be limited to the exact construction and arrangement of the several parts composing the same, as many changes can be made lBvithout departing from the spirit thereof,

What Iv claim and desire to secure by United. States Letters-Patent is:

l. A centrifugal pump comprising a casing having a chamber, a self balancing impeller provided with a chamber in its upper part, registering with said casing chamber, and a removable diaphragm between said chambers provided with a port adapted to be -opened and closed by the axial movement of said impeller.

, Q. A centrifugal pump comprising a casing having a chamber, a self balancing impeller provided with a chamber in its upper part opposite said casing chamber, and a diaphragm having ports near its periphery adapted to open and close communication betweensaid chambers by the axial movement of said impeller.

3. A centrifugal pump including a casing, having an upper chamber therein, closed by a removable diaphragm, downwardly projecting ports from said diaphragm communicating with a pressure chamber formed in the impeller of the pump, an annular shoulder in said impeller surroundin said pressure chamber adapted to close sai ports and flanges on said diaphragm and said impeller coperating to partially seal said chamber in the impeller.

4. A centrifugal pump comprising a casing, a self-balancing impeller provided with a pressure chamber, a removable diaphragm, secured to said casing, adapted to close said pressure chamber and a downward projecting annular flange on said diaphragm engaging the upper part of said impeller and forming therebetween a running joint.

5. A centrifugal pump comprising a casing, a self-balancing impeller, a removable diaphragm appl/ied to the casing and constituting with the impeller, a pressure chamber and a removable running joint.

6. A centrifugal pump including a casing having an upper chamber therein closed by a removable diaphragm having a plurality of openings, a flange on the impeller of the pump adapted to close said openings, flanges on said impeller and said diaphragm, cooperating to form a pressure chamber in said impeller.

7 A centrifugal pump including a casing having an upper chamber formed therein closed by a removable diaphragm, downwardlv projecting ports from said diaphragm communicating. with a pressure chamber formed in the impeller of the pump, an annular shoulder on said impeller adapted to close said ports, flanges on said diaphragm and said impeller, coperating'to partially seal said chamber in the impeller, a throat on said impeller, a suction opening in said casing surrounding saidthroat and a removable bushing interposed between said throat and said suction opening.

8. A centrifugal pump including a casing, having an upper chamber therein, closed by a removable diaphragm, ports in said diaphragm communicating with a pressure chamber formed in the impeller of the pump, a flange in said impeller adapted to 'close said ports, and flanges on said diaphragm and said impeller cooperating to partially seal said chamber in the impeller. 9. A centrifugal pump including a casing having an upper chamber formed therein i closed by a removable diaphragm, ports in said diaphragm communicating-with a pressure chamber formed in the impeller of the pump, a flange on said impeller adapted to close said ports, flanges on said vdiaphragm and saidv impeller, coperating to partially seal said chamber in the impeller, a throat on said impeiler, a suction opening in said casing surrounding said throat and 'a removable bushing interposed between said throat and said suction opening.

10. A centrifugal pump, comprising acasing, a Self-balancing impelier provided With an annular extending ange forming a run- 10 ning joint With the suction, a shoulder on said flange and a removable inverted IL-shaped In testimony that I claim the foregoing, I 15 have hereto set my hand this 11th day of July, 1913.

FERDXNAND W. KROGH.

Witnesses:

J. C. MARTIN, o D. B. RioHARDs.