US1696776A - Low-lift pump - Google Patents

Description

D ec 25, 1928.

S. L. MENGE LOW LIFT PUMP Filed March 9, 1928 2 Sheets-Sheet l Snucntor 5. L. LM?

www 9 Gttorneg.

uw 25, 192s.

S. L. MENGE LOW LIFT PUMP Filed March 9. 1928 2 Sheets-Sheet. 2

Patented Dec. 25, 1928.

UNITED *STATESA SIDNEY L. MENGE, OFNEW ORLANS, LOUVISIANA.

LOW-LIFT PUMP.

Application filed March 9, 1928. Serial No. 260,527.

Reissued Letters Patent .to J oseph Menge,

No. 11,214, dated December 20, 1891; also Letters Patent to Joseph Menge, No. 171,485,

granted March 22, 1892; also Letters Patent to Sidney L. Menge, Nos. 950,398, granted February 22, 1910; and 1,630,180, granted May si, 192

In this type of pump, there is a free passage for the water, which is pushed through without being subjected to any material pressure, thereby differing from snail or other force pumps. y

My present invention will be more fully understood after reference to the accompanying drawings, in which like parts are indicated by similar reference symbols throughout the several views, and in which Figure 1 shows a sectional elevation through the center of the pump casing, in which a rect-angular wooden box isused, the propeller and pump shaft being shown in elevation.

Figure 2 shows a section along the line 2-2 of Figure l, looking down. l

Figure 3 shows a modification, in which the pump casing is made of metal and substantially cylindrical in form, and

Figure 4 shows an inverted plan view of..

the construction shown in Figure 3.

Referring first to Figures 1 and 9., A represents the pump casino preferably having' the closed bottom A, so that the casing may be set up on the bottom of the ditch or the drain. Above the bottom, inlet openings A0 are provided for the influx of water. At the corners of the box are provided vertical beams A2, to which the sides of the pump casing are attached. The top of the casing is open, as shown in Figure 1, and carries the cross beams A3 and A4, as shown in said figure.

One side of the pump casing is provided with an outlet passage above the delivery trough B, which may be made of wood, and should be suitably braced, as by the braces C. D and D represent two shelves, which are mounted above and below the housing E, and

which shelves are provided with a circular opening in the center thereof to register with t-he opening through the housing aforesaid, as will be hereinafter described.

kThis housing E is provided with a tapered"y bore e in the form of a frustrum of anV inverted cone, the elements of said cone having a very slight inclination, and below and '35 above this tapered bore, the housing is flared outward, as at e and e2, so as to give a free." passage forv the water, as it is pushed upward through the pump.

The purpose of the entering and leavingiifl) cones@ and e2 is to gradually increase the velocity of th-e flow of the water from the entrance velocityy at Ao to that which thewater will attain in the propeller chamber e, The purpose of the inverted cone e2 Vis to 7 yCh gradually reduce this velocity to a much lower velocity in the discharge chamber; thereby causing an increase in efliciency. These cones e, e and e2 also havethe additional purpose of reducing the whirl in the S0 water, caused by the rapidly rotating screw propeller.

Below the shelf D, I provide a cross piece F, preferably triangular in cross section, to facilitate the flow of water, carrying the bearing G for the lower end of the propeller yshaft H, to which shaft the hub I of the propeller is secured, said propeller having blades I', which blades areY of. a suitable pitch to lift the water to thedesired height.

Above the shelf D may be provided a cross piece F also preferably triangular in cross section,.carrying the journal bearing G for the pump shaft, and above the beam A2, I provide an anti-friction bearing J, preferably a ball bearing, having balls y' on which the base of the nut K rests.

This ball bearing and nut form a'suspension bearing on which the weight of the propeller and its shaft is normally suspended, and when in use, this bearing also serves as a thrust bearing to resist the downward pressure of the water as it is forced upward.

This nut is adjustably mounted on the screw thread /L on the upper end of the shaft, and if desired, a lock nut K may also be used. The propeller shaft is adjusted vertically by screwing up or easing up on this nut K, so that the propeller blades will just clear the conical bore e, and as the tips wear', as will occur due to the presence of sand, grit or the like in the Water as it goes upward, by easing up on this nut K, the shaft A is permitted to descend slightly, and the tips of the propeller blades will just clear the lower portion of the bore Where the calibre is somewhat less. By this arrangement, the tips of the propeller blades may be conveniently adjusted, so as not to touch, but just clear the adjacent portion of the bore of the housing E.

The propeller shaft may be driven in any convenient Way, as by means of a pulley/,or by direct connection with a motor, not shown.

lllhile l have shown, in Figures l and 2, a circular' housing E in a rectangular pump casing, l recognize that a rectangular casing has its disadvantages with regard to the free circulation upward of the Water, but it has its advantages, owing to cheapness of construction and facility with which the parts may be assembled and used.

But in order to secure a somewhat increased efficiency of the pump, the pump casing may be made free from angles or of a. substantially cylindrical form such as is shown in Figures 3 and 4, in which thev casing is made of tivo parts, the lower part M being flared at the bottom, as at m, and provided with a flange m at the top. ln this bottom section, l pro-v vide the housing E, having the tapered bore c and the conical surfaces e and e2, as already described With reference to Figures l and 2.

' On top of this section M, l provide a spider N, having its ends n resting on the flange m at the upper end of the section M. The upper section M of the pump casing has a delivery passage M0 between the curved guide surfaces m3 and m4. Above the outlet passage, the pump casing may be continued in the cylindrical form, as at M, if desired.

The propeller hub I, carrying the blades l', is secured on the shaft H', which passes through the journal bearing a and m5 and also through the anti-friction bearing j, which is supported on the head O` of the pump casing. The' nut K rests on the ball j, and this nut forms a suspensionV and thrust bearing for the propeller shaft. This nut may be adjusted so that the tips of the blades I may be set at the desired distance from the bore e',

hereinbefore described.

ln addition to the nut K, l may provide a loch nut K, if desired.

The propeller shaft may be driven in any suitable Way, as by a pulley, gear or other arrangement carried by the extension shaft H2 connected by the coupling members It and h2 to the propeller shaft l-l. ln this form of pump casing having the iared bottom M, obviously this must be raised clear of the ground, and for this reason, l provide supporting brackets P, which may rest on any suitable frame Work, not shown.

lfilhile l have illustrated and described tivo embodiments of the invention in the preferred forms, it will be obvious that various changes could be made in the construction, combination and arrangement of parts, Which could be used Without departing from the spirit of my invention, and l do not mean to limit the invention to such details, except as particularly pointed out in the claim. I

Having thus described my invention, what l claim and desire to secure by Letters Patent of the United States is A propeller pump comprising a casing provided with a lower or suction chamber and an upper or delivery chamber, Wit-h means for ad mitting Water to the lower chamber, and for carrying it od from the upper chamber, a partition mounted between said chambers and provided with a bore in the form of the frustum of a slightly tapered inverted cone, said partition being` provided With frusto conoidal faces flaring outwards above and below said bore, a shaft journalled in said casingconcentric With said bore, and a screw propeller mounted on said shaft and having the tips of its blades in close proximity to said bore.

SlDNEY LAVRENCE MENGE.

Images