US2659312A - Centrifugal pump - Google Patents

Description

Nov. 17, 1953 w 2,659,312

CENTRIFUGAL PUMP Filed Sept. 8, 1950 FIG, 6 INVENTOR.

ADOLPH WAHLE BY ATTORNEY Patented Nov. 17, 1953 W. H. Martin,

CENTRIFUGAL PUMP Adolph Wahle, Davenport, Iowa, assignor to Davenport, Iowa Application September 8, 1950, Serial No. 183,850

3 Claims. 1

The present invention relates to the art of rotary pumps and more specifically to centrifugal fiuid pumps. However, centrifugal pumps having an impeller with curved blades and a volute for discharge of iluid have long been known, but, today, there is a demand for a rotary pump at low cost but with still higher eiiiciency than has so far been produced.

An object of the present invention is to proe an inexpensive pump, but one which is lienible in operation and simple to construct and maintain in operating condition. It is a further object of this invention to provide in a single pump either high pressure differential between inlet and outlet or high rate of delivery proportionate to the horsepower input, depending upon the delivery taken from the pump. Other objects and advantages will be apparent from the following description and from the subjoined claims.

A preferredforln of this invention is shown in the accompanying drawings in which:

Fig. l is a section of this preferred pump on a plane through the pump shaft;

Fig. 2 is a section substantially on the line 2-2 in Fig. 1;

Fig. 3 is an elevation from the rear side of the pump as shown in Fig. 1;

Fig. 4 is a right end elevation as shown in Fig. 1;

Fig. 5 is an elevation of the rotor from the right side as shown in Fig. 1;

Fig. 6 is a partial section on the broken line 6-5 in Fig. 5; and

Fig. 7 is a fragmentary isometric view of the rotor showing flow lines of fluid within the pump.

The pump shown has a body 8 which is provided with heads 9 and Ill. The head 9 has a circular shoulder II with a fiat face, which shoulder is of a size to fit into the body 3 and center the same. The head 9 has a central bearing opening Ito through which a shaft It extends. The head I0, also, has a similar shoulder H? of a size to fit into the body 8 and center the same. The inner face of said shoulder is is slightly dished inwardly. The bore of the pump body 8, enclosed by heads 9 and 10, forms a cylindrical chamber 16. p

An. impeller :9, consisting of a circular flange at with a central hub 2|, and radial blades 22, is provided with an opening for the reception of the shaft 12 on which it is non-rotatably mounted. The impeller is provided with openings 24 through the flange, adjacent to and between the blades to balance the pressure on both of the pump sides of the flange. However, with a double type of impeller, as shown in Patent No. 2,419,924 this is not necessary because, in the double type, the impeller is balanced.

The blades 22 are secured to the flange 25) and to the hub 2| in positions radially of the shaft I2, and they extend outwardly from the hub 2|. The blades are narrow at the tip and much wider at the hub. Thus the edges of the blades 22 are at an angle to the face of the flange 2t.

With the impeller 19 in place in the chamber I 5, and in motion, an unobstructed V-channel is formed adjacent the edges of the blades 22. The widest part of this channel is, naturally, at the tip of the blades, where the blades are the narrowest.

The head I B has an opening I5 positioned centrally thereof to provide an inlet into the cylindrical chamber 15. The water, thus taken in at the eye, flows radially between the blades of the impeller and over the forward edge of each blade, as indicated by arrows in Fig. 7, into the V-channel. This equalizes the pressure of the impeller I9 and the V-channel. The discharge of the water from the V-channel is through a tangential outlet 23. The tangential discharge avoids the necessity for a volute discharge.

Within the opening [5 to the chamber I 6 there is provided a central hub IT for supporting the shaft I2 axially of the body 8. The hub I1 is supported by arms 18 secured at their inner ends to the hub and at their outer ends to the head I I] about the inlet or eye 15. The hub 11, furnishing a bearing Ha for the shaft 12, acts as a deflector for water entering the eye l5, since it has its end, toward the flow of water, rounded, as shown in Fig. 1, to streamline the flow of intake water.

It is of course understood that the specific description of structure set forth above may be departed from without departing from the spirit of this invention as disclosed in this specification and as defined by the appended claims.

Having now described my invention, I claim:

1. A centrifugal pump comprising a body, a head closing one end of said body and having an opening therethrough centrally located therein, a hub positioned in said opening and supported by said head, said opening being larger than said hub whereby to provide an annuluar inlet about said hub, a second head closing the other end of said body and having a bearing located centrally therein, said body and said heads forming an of said chamber and approximately cylindrical chamber therein, a shaft rotatably supported by said bearing and by said hub, an impeller amxed to said shaft within said chamber, said impeller having a circular flange adjacent to the head having the bearing, the chamber in the body being divided by the flange into two compartments, one compartment being much larger than the other, and the impeller having radial blades which extendat their inner ends from said flange to the oppositeend of said chamber and at said flange outwardly into running engagement with said body, said flanges having holes therethrough between the bladcs adjacent the hub, said blades terminating short of engagement with said bodyandthefflrstmen tioned head at the juncture thereof, whereby? to provide in said chamber an --linoinstructed entirely therearound, and said body having an outlet opening therethrongh to the outer portion extending between the facing surfaces of said flange and of the"flrst mentioned head.

2. A centrifugal pump comprising a body open at the ends with a pair of heads'closing the' ends thereof and forming a, cylindrical chamber therein, an impeller rotatably'supportedinsaid'dhainher, said impeller havinga fiangedividingthe space between the heads into unequal parts and having radial blades secured to' said flange; said flanges having holes therethrough between'the blades adjacent the hub, said blades extending outwardly only a part ofthe'length ofsaid impeller, whereby to provide an unobstructed channel for 3. A centrifugal pump comprisinga the flow of liquid about-"saidch'amberyone of said heads being flat'a'nd thes'econd body hav ing, internally, a cylindrical chamber, a first head provided with a shoulder closing one end of said body, said head having a bearing opening, a second head for the second end of the body opening, said second head having an axial opening, a first hub in the second head having an opening therethrough and connected thereto by a plurality of arms extending radially from the said hubto the second head, the openings in the two heads being in alignment, a 'sh'attin the openings, an impeller in the body mounted on said shaft, said impeller having a flange mounted at a right angleto the shaft and close to the first head but being much farther from the second head than TrUmWhe flrst'heaid, said flanges having holes therethrough between the blades adjacent the -hub.=a second -hub-m said chamber, blades connected to said second hub and arranged parallel tosaidshatt, said second hub connecting said blades and said shaft, the blades being wider where connected-to the-hub and narrower at their=-outer -ends, whereby there is -iormed between. the bla'd'es'and the' second head an unobstructed -v-channehin the body, the inlet for the pump being-attheeye and there beinga tangential 'Klischargeppening.

-ADOLPH WAHLE.

-Beferences Cited in the file of thispatent

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