US1342551A - Deep-well propeller-screw pump - Google Patents

Description

DEEP WELL PROPELLEB SCREW PUNLP-x APPLICATION FILED OCT. 18. 1916.

Patented June 8, 1920.

2 SHEETS-SHEET l.

INVENTOR PER -ATTORNEY F W. KROGH. DEEP WELL PROPELLER SCREW PUMP. APPLICATION FILED OCT. 18, 1916.

1,342,555 1 Patented June 8, 1920. l 2 SBEET$SHEET 2- lNVENT OR rmw 41 2 ATTORNEY.

FERDINAND w. KRoe or SAN FRANCISCO, POULSEN ADMINISTRATORS or SAID CALIFORNIA; CARL A. KROGI-I AND OSCAR FERDINAND W. .KROGH, DECEASED.

, DEEP-WELL PROPELLER-SCREW PUMP.

Specification of Letters Patent.

PatentedJune s, 1920.

Application filed October 18, 1916. Serial No. 126,409.

' proved series of suitably proportioned and curved blades for impelling the water and of intervening sections formed into diverting channels for directing the flow of the water.

The objects of my invention are to pro.- vide a simple, practical and operative pump that will efficiently and constantly discharge an unvariable stream by means of a pair of suitably arranged propelling blades, having diverting waterways interposed therebetween; also to provide in combination therewith an automatic compensating device in y the form of an adjustable valve pivoted to the main shaft that will regulate and control the water pressure and thereby balance the pump shaft.

Other objects of my invention will become apparent as the description progresses. In the two sheets of drawings here annexed forming a partof thisapplication in which: I

I Figure 1 represents a vertical section taken through a vertical propeller 'screw pump constructed in accordance with this invention.

Fig. 2 is a cross section taken on line aa of Fig. 1. V V V Fig. 3 is a cross section taken on line Z) b of Fig.1.

Fig. 4 is a modification and elaboration of Fig. 1 showing the means of lubrication and the compensating device for automatically balancing the opposed cooperating series of propeller blades, and. the shaft.

Fig. 5 is a cross section taken on the line c-cof Fig. 4. o 4

Fig. Geis a cross section taken on the line cl-d of, ig. 4 and Fig. 7 is a vertical section of a thrust bearing for supporting the'weight of the shaft.

In detail the constructionillustrated in the drawing, Fig. 1 shows the outer casing of a pump designated by the numeral l havei ing the inner, tubular shaped casing-'2, spaced from the outer casi'n'gl and held in position by the coredinlet openings 3. The outer casing 1 is flanged at its topmost end as at '4 to provide a means for connecting the, pipe.

The bottom 5 isrounded at 6 tOfCllIl'llIllSll the frictional tendencies and has the bearing j 7 formed therein for the shaft 8, and to re-' ceive any end thrust which the said shaft might have.

Securely fastened to the shaft 81are the l hubs 9 provided with a plurality of suitably shaped spiral blades '10. The Hat semi-elliptic braces 11 securely fastened in a slanted position within the collar 12, which is rigidly secured to the inner casing 2, are interposed between each [set of spiral blades 10 and prevent any water that is being pumped from swirling. As can be easily perceived in the drawing (Fig. 1) theshaft 8 has two series of spiral blades 13 and 14, correctly spaced with reference to the inlets 3, the pressure faces of the opposite series of blades are directly-opposed. The blades 10 on the lower series 13 are so formed that when revolved, the liquid contained in the inner casing will be forced downward, whereas the series 14, when revolved in the same direction, as the lower series, will force the liquid upward. This is dueto the fact thatthe blades are spirally opposite directions.

The action of the described pump is somewhat similar to the double acting pump now in common use in that, a double pumpshaped, and pitched in ing action results, but pulsation is absent,

the latter 1 being a continuous flow, which the. alternating aca downward thrust at 13 and an upward thrust at 15., The liquid in each-case is forced away from the inlets 3. As the liquid is being pushed downward by the propeller seriesv 13, it encounters the concave surface .6 of

. 14 and force the liquid through the outlet 7 blades 10 an aetionis imparted to it action is broken by the interposed braces the liquid.

bottom 5, and not being able to go back through the tubularccasing 2, is deflected upward in the channel16 formed by the casing 2,,spaced fromithe outercasing 1. The liquid from the propeller series 14 hasbeen forced upward synchronously with the water from series 13 that has been forced downward so that the two liquids meet at through the the outlet15, and continue on connect ng plpe (here not shown). Asthe water 1s pressed forward by the revolving 11; The braces ll are a valuable asset in that they destroy any whirling motion oi urality of spiral blades contained The p in each of the series '13 and 14 are so fas tened on the shaft '8 that they are balanced perfectly. Were: the series blades 10 not affixed in a-balanced manner, an undue strain would be imposed onone or the other propellers and would deter its mechanical abilities. V i

A modification is shown in Fig; 4 in which 17' denotesthe main pump casing im closed atoits lower end by the enlarged 63$: ing 18, which may be connected toa suction pipe. Thetubu-lar casing 17 is turned at 19 so parallel with the main pump casing. The

a ends of the casing 17' and 20 terminate in-the upon which series 24 and 25 attached thereon with 7 propellersof series 24 or 25 and its move- 1 ments, operate the compensating device consisting of arm. 30 pivoted to the extended portion 31 above the chambers 21 and pivotally vided with connecting rod 83 having the diminish or increase cone shaped gate 34' secured thereonito the pressure of liquid passing through the port 35; i

The operation of the compensating device is asfollows, The port 85 being closed 5 a as shown in Fig. 4 by the downward move- 'ment of. the shaft thenthe downward pressure of water from thepropeller series 24 againstthe gate 34 will become greater than the upward pressure. of water from the propeller series 25 that will cause the shaft 23 to move upward and through the arm 30 and rod 3.3,; the gate 34will'move upward which V propellers. and the upper that the continued section 20-isto the Variations in the 131 68% 7 sure of he incoming liquid exerted on the connected to shaft 23 at 32, and pro- 7 and consequently open theport 35 thus releasing the water pressure and thereby causing the'upward waterv pressure from the propellers series '25 together .with the weight of the shaft, etc., to'move,the latteridownwardly and vice versa until the shaft 23 finds its "equilibrium, thus balancing the shaft. f

' Rotation is imparted to the shaft 28? by a belt running on, the pulley 36, or motor connected to the shaft if desired.

The maner of lubricating deep well shafts has heretofore: been, aj source,- of' endless trouble, but-it'is: wel'ltaken. care, of in this case by the positive force pump 87; havautomatically ing the pipe 38" with its tributariesB-Q run- 7 ning to allthebeari ngs v a Around the prope1l'ers shaft; as shown in Figs. 1 and 4,,is a pipe easing 40,,whi'ch is located between the upper series 25 of'the shaft and carries, the ,waste oil leaking out from the hearings to; the discharge pipe, 41.,

As shown in Fig1thepipe casing 40is provided above the collar 12 with packing bearing 29' of the c 42 forced down by a weight '43,,to' prevent i il at that point from leaking out into the outer casing-p V It will be noticedin Fig; 1 that the, number of propellers at the top of casing 2 15 less than at the bottom, because in addition j p to the balance of. the water on the upper propeller, it, also has to carry all its couplings and connections. This can-- not be accurately done. It will, therefore,

require an adjustable mechanical thrust bearing,\to.take the unbalancedweight of same and'keep it, in its proper place so that v the propeller hubs will .haverno rubbing surfa e thrust bearing consistingof two frames 44, and 45 forming a part of the main casing of the pump and projecting therefrom around the rotating shaft 8 thereof.

Upon the shaft, 8 is a. collar secured thereon between: the frames 44and45 byrneans of. a set. screw 4 or otherwise, and on each side of the collar 46 are two. loose rings. 48provided therebetween with ball bearings 49 to form antifrictional means. against one,v of the projecting frames 44 and 45 to which theshaft may move. 1 v p Havingftlrus described; my invention, and anembodimcnt of it, in the full,'clear and exact terms-required by law, and knowing that it comprises novel, useful and valuable improazements in the, art to. which it pertains, I here state that I do not wish to be limited to. the: precise COIlStIllClllOIliLllfil arrangement of the several parts, as, herein set forth, asthe samemay b evariously modified by a skilled mechanic without departing from thespirit' of the invention.

In 7 I have shown an example of such 46 aa nsauy j prej ectine" V the shaft with V What I claim and desire to secure by Letters Patent of the United States, is the fol- 7 mg having an intake port; a shaft mounted in said inner casing having securely fastened thereon a set of propeller screws of which one set of pressure faces is mounted on the reverse of the other in an inclined position; a continuation of said inner casing on the outside running parallel to said inner casing; a chamber covering the ends of said casing; and a valve covering the ends of said parallel pipe controlled by a lever arm attached to the main shaft.

2. In combination with a screw pump; a casing having an outlet port; an inner casing with inlets therein, having a lower extended portion bent and made parallel with the said inner casing so that the ends lie in the same plane; a chamber covering said open pipe ends; a shaft with two sets of pro peller screws securely mounted thereon having the blades of one set attached the reverse of the other, revolubly running in said inner casing; between said blades; and a valve covering the end of said bent parallel casing, having an arm attached thereto that is pivotally mounted on the shaft, and pivotally secured to the casing of said chamber. V

3. In combination with a screw pump; a casing having an outlet port; an inner cas a deflecting means interposed having a lower-enmade parallel with that the ends lie in ing with inlets therein, tended portion bent and the said inner casing so the same plane; open pipe ends; a shaft with two sets of propeller screws securely mounted thereon having the blades of one set attached the reverse of the other, revolubly running in said inner casing; a deflection means interposed between said blades; a valve covering the end of said bent parallel casing, having an arm attached thereto that mounted on the shaft and pivotally secured to the casing of said chamber, and a means for lubricating the bearings of said shaft.

4. In combination with a casing having an outlet port; an inner casing with inlets therein, having a lower eX-' tended portion bent and made parallel with the said inner casing; a shaft with two sets of propeller screws securely mounted thereon having the blades of one set secured the reverse of the other, revolubly running in said inner casing; a deflection means interposed between said blades; a valve for said bent parallel casing, andmeans on said shaft to control said valve.

In testimony that I claim the foregoing, I have hereto set my hand this 13 day of Oct., 1916, in the presence of two witnesses.

FERDINAND W. KROGH. Witnesses: Y

LOUISE BEARDIN, FLORENCE L. WOLFE.

screw pump; a

a chamber covering said is pivotally v

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