US1974107A - Drilled well turbine pump - Google Patents

Description

S 18,1934." i Hm ngmgm" DRILLED WELL TURBINE PUMP Filed Aug. 10, 1931 I #5 7: n Q5. v if I y W f lmi INVENTOR JAMES M. HAW

A+TORNEY Patented Sept. 18, 1934 DRILLED WELL TURBINE PUMP James M. Bait, Long Beach, Calif assignor to Food Machinery Corporation, a corporation of Delaware Application August 10, 1931, Serial No. 556,046

14 Claims.

This invention relates to drilled well turbine pumps, and provides an improvement in pumps of this nature, which improvement resides primarily in increasing the pressure of the pump by unobvious changes in the internal structure of the pump. The primary object of this invention is to provide a drilled well turbine pump having an impeller wherein the fluid accelerating path through the impeller is materially lengthened without increasing the dimensions of the component parts of the pump assembly. The actual effect is to increase the effective diameter of the impeller, which results in increasing the hydraulic pressure developed by the impeller, which in turn renders the pump useful to lift against higher heads with an increased, gallonage.

The invention has been designed primarily in connection with pumps which have impellers provided with an upper and a-lower shroud; however, it will be apparent that the principle involved in this invention is also applicable to pumps having impellers with but a single shroud.

Briefly stated, the invention consists in extending the fluid accelerating vane of the impeller beyond one or both of the shrouds of the impeller and into the fluid passages of the bowl in which the impeller operates. Since it is well known that the fluid pressure developed by impellers of this nature varies directly as the square of the efiective diameter of the fluid impelling vane,'it is apparent that a small extension of the vane results in a comparatively large increase in such fluid pressure. In practice, the vane may be extended beyond the inner diameter of the mating connection between adjacent bowls of the pump. The manner in which this is accomplished'will be more fully explained hereinafter. By extending the fluid controlling vane in the manner stated, the characteristics of the pump heretofore found most desirable in practice are maintained. Also, the efflciency of the pump is improved, due to prolonged accelerating control of the fluid by the impeller. In addition, it becomes apparent that by virtue of being able to increase the efiective fluid controlling diameter of the impeller without increasing the dimensions of the other parts of the pump that pumps heretofore designed for delivering a certain gallonage against certain heads with maximum efliciency may be used for deliv-' 'ering increased heads against the-same gallonage with the same emciency. This obviously reduces the cost of production since it enables smaller pumps to take the placeof larger ones.

.ri ng-shapedor annular opening which is defined It accordingly becomes afurther object of this invention to provide an improved impeller in pumps of the character described, which impeller is characterized by having the upper portion of the fluid accelerating vanes extending beyond the upper shroud of the impeller. As before stated,

in one of its aspects this invention embodies an impeller having vanes extending into the water passage of the bowl in whiclr it operates. It is obvious that vanes of this nature will extend beyond the inner circumference of the mating connection between adjacent bowls, and it therefore remains to provide means for assembling impellers and bowls of this type. For this purpose, I provide recesses between the bolt holes in the lower open end of each bowl, which are adapted to pass the extending vanes and permit them to be raised into position in the water passage of thebowl where they may rotate freely.

A further object of this invention is therefore to provide a combination of a bowl and an impeller wherein the impeller has vanes extending beyond the shrouds and the bowl has recesses to pass said vanes into operative position.

Other objects and advantages will become apparent as the description proceeds in conjunction with the drawing, in which- Fig.4 is an elevation of a fragment of a pump assembly, partly in section; showing one form of my invention; I Fig. 2 is an inverted plan view on line 2-2 of Fig. 1; and

Fig. 3 is a view, similar to Fig. 1, showing another form which my invention may take.

Referring to Fig. 1 ofv the drawing, 1 have shown a part of a pump assembly comprising bowls A and A, suitably connected. Since the bowls are capable of being multiplied to fit existing requirements of pumping conditions, and since each bowl would be identical, a description of one bowl only will be entered. The bowl A is provided with an'annular water passage 11 which extends through the bowl from bottom to top and is to be considered as originating in a by alower edge 13a. on a hub member 13 and an inner edge 13b within the bowl. The position of this annular opening, which is the mouth through which the fluid'projected from the impeller enters between smooth walls defining the fluid passage 11 through the bowl is indicated by the dotted lines 11a in Figs. 1 and 3. Within said water passage is provided a plurality of intermediate vanes 12 which not only serve to gradually check whirling of the water column, 11g

but also to support the hub 13 which forms an intermediate bearing for a shaft 1% which'is driven from the surface in any conventional manner. Mounted upon the shaft 14 is the usual impeller B, which is arranged to be rotated by the shaft by means of a key 15. l

The impeller comprises what will be termed an upper shroud 15, a lower shroud 1?,"and a fluid impelling vane 18. Between the upper and the lower shrouds l6 and l? and outwardly between the vane 18 a water passage 19 is formed.

The bowl A is connected to the bowl A by means of a plurality of bolts 20 which are synr metrically spaced around the circerence of a flange 21, and are adapted to screw-threadedly engage holes 20' in the lower end of the bowl A. In practice, it is customary to turn down the outer surface of the flange 21 on the bowl A, as shown at 22. This forms a seating surface for engaging the two bowls and, at the same time, produces a mating shoulder 23 on the bowl A, which serves to accurately locate the bowl A with respect to the axis or the shaft 14 by means of a complementary mating shoulder 24 on the inner diameter oi the lower open endoi the bowl A. it is recod that such matlm shoulders are necessary since the shaft it is continuous and.

lit is recognized.

is iournaled in each bowl. that the shoulder 23 must be of less dieter than the bolts ZQinorder. to leave sumcient material for the bolts 20 and the bolt holes 2o. This ,ordinarily precludes any possibility of exten the vanes it beyond the lower shroud 1'? since the lower shroud 17 is arranged to form a rotating clearance free from the shoulder 2d of the bowl A.

As shown in Fig. l, the vane 18 is extended be yond the shrouds 16 and 17 and actually exerts a fluid-controlling influence in the lower part of the water passage 11. In order to permit this, it is necessary to dispose the lower edge of the intermediate vane 12 as shown at 25. This results in a benefit since the lower edge of the vane is removed from the high velocity zone of the pumped fluid. It is also necessary to provide means for assembling the impeller into an operative position through the lower open end of the bowl'A. Since the outer edge 26 of the vane 18 extends beyond the circerence of the shoulder 24, it is necessary to provide means for passing the vanes through the shoulder. For this purpose, I form recesses 29 between the bolt holes 20', as shown m Fig. 2, which permit the extending portions 26 of the vanes 18 to pass upwardly into an operative position in the bowl as shown in Fig. l. The recesses may be of any shape or size (preferably small) and are merely for the purpose oif'passing the extended portions oi the vanes for purposes of assembling, and will not in any way interiere with the operation or the en ciency oi the pump.- In this manner the parts of the pump may be assembled and it is apparent that by extending the vane 18 outwardly, as shown at 26, the fluid ccntrolling influence of the vane is materially increased.

In Fig. 3 I have illustrated another form which my invention is take, which is somewhat simpier in construction. in this embodiment, the same numerals be used to designate similar parts, but will be primed to denote the different construction.

In this form, the outer edge or the vane 18 extends beyond the upper shroud it, and is limited in its extension by the eter or the mating shoulder 34' through which it must pass in being assembled. This type oi impeller does not necessitate recesses in the shoulder zt' since the outer edge 27 of the vane 18' is adapted to pass within the circumference of the shoulder 2e. However, it is apparent that the fluid-controlling influence oi the vane 13' is materially increased since it is extended beyond the upper shroud and into the fluid passage 12 of the bowl A. In con ventional construction, the vane 18 would termi= note at the dotted line 28, whereas in my improved to, the terminating edge extends beyond this line and operates at a larger diameter. Itis thus evident that the increased efiective diameter of the impeller will operate to produce an increased hydraulic pressure and that this increase may be obtained without increasing any of the external dimensions or the pump units.

Although I have shown my invention as end bodied in two forms, nevertheless I am aware that it may take other forms and that the prin-- ciple of extending the fluid-controlling influence of the impeller in accordance with my irnrentionv may be adapted to other types of impeller, and

'1 therefore intend this, disclosure to include a l such modifications and adaptations of my invention as come within the scope of thedisclosure and the purview of the appended claims.

I claim as my invention:

1. For use in a pump of the character described the combination of: a bowl having a. lower open end adapted to be connected to an adjacent bowl; an impeller adapted to be rotatably mounted in said bowl through said open end, said impeller having fluid-impeding vanes of greater diameter than the inner diameter of said open end and said bowl having recesses in the inner wall or said open end adapted to pass said extend'ng vanes into operative position.

2. For use in a pump or the character described the combination of: a bowl having a lower open end and a fluid passage extending through sa d bowl and communicating with said open end; an impeller adapted to be rotatably mounted in said bowl through said open end, said impeller having fluid-irnpelling vanes arranged to extend into said fluid passage beyond the inner circumference of said open end, the lower end of said bowl having passages therethrough for passing said extending vanes through the lower open end of said bowl into operative position.

3. For use in a pump of the character described the combination oi: a bowl having an annular fluid passage bounded by fixed substantially concentric walls extending therethrough; a shrouded impeller rotatably mounted in said bowl, said impeller having fiuid-impelling vanes extending radially outward beyond the shrouds of the inipeller into said fluid passage.

4. A pump unit embodying: a bowl having walls defining a circular fluid passage therein; and an impeller rotatably mounted in sad bowl, said impeller comprising an upper shroud, a lower shroud of greater diameter than said upper shroud, and

fluid-tunnelling vanes positioned between said shrouds, the outer edgesoi said vanes being oi equal diameter with said lower shroud, and having their upper comers extending into said fluid passage.

5. in a pump of the, character described the combination of: a plurality of bowls having circular mating members for forming a connection therebetween; an impeller rotatably mounted in each bowl, said impeller having iiuid-impelling vanes of greater diameter than said mating Nil lilo

zit

members; and said bowls having radial recesses arranged in a, circumferential series in one of said mating members and adapted to pass said vanes.

6. A pump unit embodying the combination of: a bowl; a fixed hub member in said bowl, said hub member being spaced from the wall or said bowl so as to form an annular fluid passage along the wall of said bowl, said fluid passage having an annular opening defined by vertically spaced edges in the bottom of said bowl; an impeller including a shroud in said bowl; and vanes formed on said impeller with their outer ends extending radially through said opening beyond said impeller shroud into said fluid passage.

7. A pump unit embodying the combination of a bowl; a fixed hub member in said bowl, said hub member being spaced from the wall of said bowl so as to form an annular fluid passage along the wall of said bowl, said fluid passage having an annular opening in the bottom of said bowl, a shaft rotatably mounted in said hub member; and an impeller mounted on said shaft below said hub member, said impeller comprising a lower shroud, an upper shroud of a diameter not greater than the smallest diameter of said annular opening; and vanes mounted between said shrouds with their outer end portions extending through said annular opening outwardly beyond the shrouds into said fluid passage.

8. A pump unit embodying the combination of a bowl having in its periphery an annular fluid passage bounded by two fixed walls, said passage having an annular opening defined by two vertically spaced edges in the bottom portion of said bowl; an impeller rotatably mounted in the bottom portion of said bowl; vanes on said impeller, said vanes having the upper corners of their outer ends extending radially through said annular opening into said fluid passage; and vanes in said annular fluid passage having their lower edges terminating above the upper edges of said impeller vanes.

9. A pump unit embodying the combination of a bowl having in its periphery an annular fluid passage which communicates with the bottom of said bowl through an annular opening defined by two coaxial, vertically spaced edges, the lower edge defining a circle of greater diameter than the upper edge; and an impeller rotatably mounted in the bottom or" said bowl, said impeller comprising a lower shroud having its periphery adjacent the lower edge of said annular opening, an upper shroud having its periphery adjacent the upper edge of said annular opening, andvanes between said shrouds with their outer ends extending radially through said annular opening into said fluid passage.

10. A pump unit embodying the combination of: a bowl having in its periphery an annular fluid passage which communicates with the bottom of said bowl through an annular opening defined by two coaxial vertically spaced edges, the lower edge circle of greater diameter than the and an impeller rotatably mounted in of said bowl, said impeller comprising periphery adjacent the opening, an upper defining a upper edge; the bottom a lower shroud having its lower edge of said annular shroud having its periphery adjacent the upper edge of said annular opening; and vanes between said shrouds, said vanes having outer edges which extend substantially vertically from the periphery of said lower shroud and upper edges which extend radially from said upper shroud through said annular opening into said fluid passage.

11. A pump unit embodying a bowl member having walls forming a circular fluid passage therein extending inwardly at its lower end where it terminates in a ringhaped opening defined by vertically spaced edges, a shaft, an impeller on said shaft extending into the lower end of the bowl member and having a circular fluid passage therein said impeller passage having an opening corre sponding with and positioned opposite the opening of the passage in the bowl member, and vanes mounted in the impeller passage and extending radially through said first mentioned opening into the fluid passage in the bowl member.

12. A pump unit embodying a bowl member hav-- ing walls forming a circular fluid passage therein, a shaft, an impeller on said shaft extending into the lower end of the bowl member and having a circular fluid passage therein having a corresponding opening with the opening of the passage in the bowl member, and vanes on the impeller extending into the fluid passage in the bowl memher, the outer walls of the inwardly extending portion of the fluid passage being formed with re cesses to receive the impeller blades during assembly of the unit.

13. A pump unit embodying: abowl having in its periphery an annular fluid passage which communicates with the bottom of said bowl through an annular opening defined by two coaxial vertically spaced edges, the lower cdge defining a circle of greater diameter than the upper edge; a shrouded impeller rotatably mounted in the bottom of said bowl; and vanes on said impeller with their outer ends extending radially beyond the shrouds of the impeller through said annular opening into said fluid passage.

14. A pump unit comprising a pump bowl having spaced walls forming an annular fluid passageway therethrough terminating at its lower end in an annular opening, an impeller rotatably mounted in said bowl and including upper and lower shrouds spaced to provide a fluid passageway hav-,

ing an annular discharge opening in registration with the annular opening in said bowl, and fluid impelling vanes positioned between said shrouds and projecting outwardly of said impeller discharge opening beyond the outer periphery of the upper shroud into the passageway of the bowl.

JAMES M. HAIT.

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