US2397718A

US2397718A - Centrifugal pump mechanism

Info

Publication number: US2397718A
Application number: US444616A
Authority: US
Inventors: Victor N Albertson
Original assignee: Individual
Current assignee: Individual
Priority date: 1942-05-27
Filing date: 1942-05-27
Publication date: 1946-04-02
Anticipated expiration: 1963-04-02

Description

April 2, 1946 l v. N. M BEQRTSON` 2,397,718

` CENTRIFUGAL PUMP MECHANISM V Filed May 27, 1942 2 sheets-sheet 1- Ap 2, 1946. v. N. ALBER-rsoN CENTRIFUGAL PUMP MECHANISM Filed May 27, 1942 2 Sheets-Sheet 2 u lill/470 mM/.vf W.

Patentedl Apr. 2, 1946 i.

UNITED STATES PATENT OFFICE CENTRIFUGAL PUMP MEcHAyIsM Victor N. Albertson, Minneapolis, Applicatin May 27, 1942, serial No. 444,616

9 Claims. '(01. 10a-103) This application is filed as a continuation-inpart of my pending application Serial No. 392,267 led May 7.194,1, under title Auto parts washer, and which application matured into Patent No.

2,352,356 on June 27, 1944. The present invention is directed to an improved centrifugal pump mechanism and associated lter; and, generally stated, consists of the novel devices, combinations of devices, and arrangement of parts hereinafterdescribed and deilned in the claims.

The invention is illustrated in the accompanying' drawings wherein like characters indicate like parts throughout the several views.

Referring to the drawings:

Fig.v l is a transverse vertical section taken through the washing apparatus such as that disclosed in my pending application above identified and showing the improved pump and lter mechanism incorporated in the said washing machine;

Fig. 2 is a longitudinal section taken approximately on the line 2-2 of Fig. 1;

Fig. 3 is an axial section taken through the pump and lter mechanism substantially on the line 3--3 of Fig. l; g

Fig. 4 is a transverse section taken on th'e line 4-4 of Fig. 3;

Fig. 5 is a 'view in elevation, with some parts broken away, illustrating a centrifugal pump head that differs slightly in details of construction from that shown in Fig..3; and

Fig. 6 is a View, partly in plan and partly in axial section, taken on the line 6 6 of Fig. 5.

Referring first to thev construction illustrated in Figs. l to 4, inclusive, Figs. 1 and 2 illustrate substantially the same use of the pump and iilter mechanism herein claimed applied to a wash'ing machine of the type of my above identied pending application, and hence, the parts of the washing apparatus, other than of the pump and illter mechanism, will be quite briey described as follows: Th'e tank for containing the washing fluid, here illustrated, is a rectangular structure 1 I0, preferably formed of sheet metal, provided at a point considerably below the open top thereof with a work table or. deck II. At one end of the tank andV separated from the interior thereof is a box-like motor housing' I2. This motor housing is, by suitabIemeanS, securely Aanchored to and obliquely projects into the tank I below the deck Il.'

Thetank I0 along its sides andends is provided with a sediment receiving trough I3. Within the motor housing I 2 is an'electric motor, not herein shown but-illustrated in my pending application, the rotor of which is provided with an obliquely extended shaft I4 that extends into a drum-like shell or casing I provided with heads I6 and I1, the latter of which is provided with a sleevelike hub I8. To rigidly support the shell I5 from the motor housing I2, a' tube or pipe section I9 is rigidly connected to the hub of the housing I2 and is extended through the head I6 and rigidly se cured within the hub I8 of head Il by suitable v means such as a set-screw 20. A long sleeve 2| is 'telescoped onto the extended end of the pipe section4 I9 'and its threaded end is extended through the4 head I6 and connected to said head by a packed nut 22.

The head I1 is hanged and is detachably connected to a supplemental head 23 by a packed joint 24 andmacbine screws 25. Head Il and.

conical screens 30 and. 3| between which is contained the fibrous filtering material 32. These screens and th'e ltering material aiford a conical partition between the receiving and the discharging end of the filtering chamber afforded by the casing I5.. i

It should now be noted that the motor-driven shaft I4 is axially extended through and journaled in. the head Il and projects into the pump chamber 26.

In thedrawings the

screens

30 and 3| are perforated thin sheet metal cones, but may take other forms. Their oblique extensionl within the casing I5 gives a maximum perforated surface within the space allotted for the same.

The centrifugally acting pump head is located within the casing of the pump chamber 26 and is secured to the inwardly projected end of the motor-driven power shaft I4. This pump head is a hollow'shell-like structure having an axial in,

take passage and open at its Aperiphery for the free discharge of the circulated water or liquid under the action of centrifugal force. The pump head may take4 various forms but is preferably of the form shown in Figs. 3 and 4 wherein the said pump head is made up chiefly of two reversely bulged discs or

plates

33 and 34, the peripheries of which areA brought close together but -Slightly spaced. The reduced nut-equipped end or trun`` I nion of the shaft I4 is extended axially through the inner disc 34 and is thus rigidly secured to said shaft for rotation therewith. The outside disc 33 has a quite large axial intake port 35 that registers with the intake port 21. A sealing ring or washer 36, preferably of ber, is seated in the ysupplemental head 23 and has frictional engagement with the bulged side of the disc 33 surroundingthe intake port 35 of the latter.

' Located within the rotary head and secured to at least one of the discs thereof are substantially radial impelling varies 31 that start radially inward of the intake port 35 and extend to or substantially to the periphery of the pump head. These vanes 31 may be spot welded er otherwise secured to both of the discs of the head. As best shown in Fig. 4, the disc 34 i's provided with several circumferentially spaced ears 38 that are bent over and welded or otherwise secured to the overlapped edge of the disc 33. Here it should be noted that' the circumferentially spaced ports 28 in the head or wall I1 of the pump chamber are located radially inward of the substantially cylindrical surrounding peripheral wall of the chamber 26, this being done for a purpose which will presently more fully appear.

The pump chamber 26, at at least one point and preferably at the extreme bottom thereof, is provided with a transverse intercepting groove or trough 3S from which outwardly extends a sediment discharge passage in the nature of a port 40. The term sediment is herein used to include solid or heavy foreign portions which, under the action of gravity, would naturally settle and which, under the action of centrifugal force, will be thrown radially outward against the surrounding cylindrical wall of the pump chamber..

As will hereinafter more fully appear, this roagainst the interior cylindrical wall of the chamber and on reaching the intercepting trough or channel 39 will be stopped or intercepted in its movement and, under the internal pressure of the fluid, will be caused to escape or be discharged through the port 48.

l The internal' fluid pressure produced in the chamber 26 will cause the liquid, except for its discharge sediment and some slight leakage with the latter, to flow through the ports 28 to the interior of the conical shell 38, fromA thence through the filtering material,` thence through the screen 3 I and from thence out through the outlet or pipe 29. With the main fluid outlet ports 28 located as described, the sediment and the fluid that carries the same will be caused to circulate radially outward of said ports 28, thereby preventing the sediment from being discharged through ports 28 and causing .the same to be skimmed off and discharged through the sediment port 48. By this arrangement the major portion of the sediment or tary centrifugal pump mechanism operates as a combined pump and separator for removing the heavy or solid portions, called sediment, from the water or other liquid that is being circulated by the pump and discharged through the filter..

impurities carried by the fluid will be removed therefrom before the fluid is subjected to the` filter and only a veryv minor portion of the separation of impurities from the fluid will be intercepted by the filtering material. Hence, only infrequently of the centrifugal head passes into the interior of K said head through the port 35 radially inward of the vanes 31 and comminglesfin a common body before it is acted upon by the said vanes. This insures even distribution of the fluid between the circumferentially spaced vanes with resulting uni- 40 form discharge of the water or fluid at the periphfluid outlet ports 28 taken singularly or collectively, so that centrifugal. separation can be automatically accomplished without materially reducing the flow through the main outlet passage or passages 2B.

In Figs. 5 and 6 I have illustrated a somewhat modified form of the rotary pump head, the same. in this instance, being made up of a concavo-convex plate 4I secured to a hub 42, and a fiatdis'c 43. In lthis arrangement the discs and plates are spaced at their peripheries, except for clinched ears 44 of the plate 4I that are bent over and hold the plate 43 in place. .'Ihe hub 42 is adapted' to be secured to the inner end of the power-driven shaft I4. This pump head, shown in Figs. 5 and 6, will have the inner propelling vanes 45 arranged like the vallesv 31 of the previously described head. Y

In the operation of the combined pump and separator described, the wateror fluid will be delivered through the port 21 into the interior of the rotary pump head and, under the action of centrifugal force, will be discharged from the periphery of the head under high velocity against the surrounding cylindrical wall of the chamber 26 and will be caused to rotate within said chamber in the direction in which the pump head is rotated. Under this action the heavier particles or sediment will be caused to closely hug or travel ery of the head.

In the application of this invention to a washer of the character described in my above identified pending application, the following additional con# nections may be employed and in the drawings are shown, to wit: The intake port 21 is con.

nected to a tubular arm 41 that is provided, at its free end, with a screen-equipped receiving head 48. The outlet port or pipe 29, by a tube 49. is connected to a valve SII from which a flexible discharge tube 5I is extended. The sediment dis'- charge port 48 is connected to a tube 52, the end of which is arranged to discharge into the sediment trough I 3.

What I claim is:

1. In a device of the kind described, a pump chamber having an axial intake port, a power driven shaft extending into said pump chamber through one wall thereof and in axial alignment with the intake port thereof, the inner periphery of said pump chamber being defi-red by a substantially cylindrical wall having anormally open peripheral discharge port for dlschage of for- 1 eignsub'stance and which has a diameter ma- 2. In a device of the kind described, a pump chamber having an axial intake port, a power driven shaft extending linto said pump chamber through one wall thereof and in axial alignment with the intake port thereof, the innerl periphery of said pump chamber being defined by a substantially cylindrical wall having a normally open peripheral discharge port for discharge of foreign substance and which has a ldiameter maaxial intake port in alignment with the intake port of the pump chamber.

3. The structure defined in claim l in which the said pump head is a hollow structure composed of axially spaced walls, one of which is provided with an axial intake port in alignment with the intake port of the pump chamber.

4. In a device of the kind described, a substantially cylindrical pump chamber having an axial intake port through one of its axially spaced walls, a nlter chamber in axial alignment with the pump chamber and having one of its end walls formed by the other of the axially spaced walls of the pump chamber, a power driven shaft extending axially through the filter chamber and into the pump chamber, a rotary impeller head mounted fast on said shaft within the pump chamber, a normally open restricted discharge port for foreign substance in the peripheral wall of the pump chamber, a main fluid outlet port leading from the pump chamber to the filter chamber through the wall of the pump chamber separating the same from the filter chamber, said main fluid outlet'port being materially radially inwardly spaced from the aforesaid restricted peripheral discharge port, a fluid outlet passage from the filter chamber, and a filter within the filter chamber interposed between the said main fluid outlet port leading from the pump chamber 'thereinto and the said outlet p0rt from the lter chamber, said filter being a stationary element.

5. In a device of the kind described, a pump chamber having an axial intake port, a power driven shaft extending into said pump chamber throushonewallthereofandinaxialalig'nment with the 'intake port thereof, the inner periphery of laid pump chamber being defined by a substantially circular wall having a normally open peripheral discharge port for discharge of foreign substance and which has a diameter 'materially less than the width of the inner circular` surface of the pump chamber, a circumferentially spaced series of main ilui'd outlet ports leading from the pump chamber in materially radially inwardly spaced relation from the peripheral wall.

of the pump chamber, and a rotarypumphead mounted onsaid shaft within the'pump chamberlndhavingimpellervanes. l

6. The structure dei-ined in claim 5 in which the inner substantially circular surface of the peripheral wall of the pump chamber is formed to provide a catch channel extending transversely thereacross I and intersecting the foreign substance discharge port.

7. The structure dened in c1aim'5 in Which the said circumferentially spaced main iiuid outlet ports extend through a side wall of the pump chamber, and in further combination with a filter chamber in axial alignment with the pump chamber and having one of its walls i'ormed by the discharge port-containing side wall of the pump chamber, the said power driven shaft extending throughsaid wall and through said filter chamber, a fluid outlet passage from the filter chamber interposed between said circumferentially spaced main pump chamber outlet ports and the outlet from the filter chamber, and an annular stationary filter element in said illter chamber between the said circumferentially spaced outlet ports from the pump chamber and the outlet from the lter chamber.

8.` In a device of the class described, a pump chamber defined by spaced side walls and an approximately circular peripheral wall, a substantially axial intake port in one of said side walls, a drum-like casing extending axially from the last said pump chamber wall, said drum-like casing havinga closed end opposite said pump chamber wall, a tube rigidly carried by and projectingV from the last said. pumpv chamber wall through the closed end of said drum-like casing, a power driven shaft extending through said tube and the said wall ofthe .pump chamber, a pump rotor mounted on said shaft within the pump chamber, a restricted normally open foreign substance discharge port through the peripheral wall of the pumpchamber, a plurality of circumferentially-spaced main fluid discharge passages from the pump chamber through the said pump discharge passage for discharge of foreign subchamber wall adjacent the said drum-like casina. said main fluid discharge passages being materially radially inwardly spaced from the peripheral wall of the pump chamber, a iiuid outlet from the drum-like casing, and an annular lter disposed in said drum-like casing intermediate said pump chamber outlet ports and the saidv outlet passage from the drum-like casing.

9. In a device of the kind described, a pump chamber having lan axial intake port, a power driven shaft extending into said pump chamberV through one end wall thereof and in axial alianment with the intake port thereof, the inner pe riphery of `the pump chamber being defined by a circular wall having a normally open peripheral stance and which has a diameter materially less than the width of the inner peripheral surface of the pump chamber, a fluid outlet port leading axially through the other end wall of the pump chamber in' materially radially inwardly spaced relation from the peripheral wall of the pump chamber,l and .a rotary pump head mounted on the shaft within the pump chamber and having impeller vanes. f

y NZALBER'I'SON.