US2245114A - Deep well turbine pump - Google Patents

Description

June 10, 1941. c. A. ORLEANS .DEEP WELL TURBINE PUMP Filed Jan. 6, 1940 2 Sheets-Sheet 1 la 1; 1941 c. A. ORLEANS DEEP WELL TURBINE PUMP Filed Jan. 6, 1940 2 Sheets-Sheet 2 Patented June 10, 1941 DEEP WELL TURBINE PUMP Charles A. Orleans, Enid, Okla., assignor of forty-nine one-hundredths to Eugene L. Merritt and Elmer 0. Holmes, both of Enid, Okla.

Application January 6, 1940, Serial No. 312,715

:2 Claims.

This invention relates to turbine pumps of the deep well type, and the primary object of the present invention is to improve the construction of the pump section of a turbine pump of this type.

Deep well turbine pumps generally include a pump section comprising a plurality of pump bowls connected together end to end, a continuous passage being provided upwardly through the pump section and being formed by connecting a series of impeller chambers, one of which is formed in each bowl, by passages which connect the outer portion of each impeller chamber with the central portion of the chamber formed in the bowl thereabove. Disposed in each of the impeller chambers is one of a series of impellers through which the pump shaft extends and which is secured to the shaft so that the impellers are rotated when the upper end of the shaft is 1'0- tated by a pump head. The rotation of the impellers centrifugally impels the well liquid upwardly through each of thebowls so as to form a multi-stage centrifugal pump.

Heretofore, in the construction of this type of pump, the impellers have been provided with radial discharge passages from which the liquid is discharged in a generally radial direction from the impellers into spaces between the impellers and the passages in the pump bowls connecting the outer portions of the impeller chambers with the spaces immediately above the bowls.

An object of the present invention, therefore, is to greatly increase the efiiciency of pumps of this type by providing the impellers whose discharge passages extend radially and then terminate in axially extending outlet portions opening through the tops of the impellers so as to direct the liquid Parallel with the discharge line of the pump and directly into the passages of the bowls.

Another object of the present invention is to extend the axial outer end portions of the impeller blades upwardly beyond the upper shroud or core of the impeller, and to extend the inner wall or core of the bowl below the axial lower end portions of the bowl blades so that the impeller and. the core of the bowl interfit for providing a very eflicient and durable construction.

It is also noted that, in prior constructions, the pump bowl has been in the nature of a one-piece casting with the outer wall and the inner wall or core of the bowl integrally connected by the bowl vanes or webs. Accordingly, it has been a difficult and expensive operation to produce the bowls so that they are free of all obstructions that might retard free flow.

A further object of the present invention, therefore is to provide a bowl in two parts consisting of an inner wall or core with integral vanes, and a separate outer wall, the two parts being connected by screws or dowels passing through the outer wall and entering the vanes. In this way, it is possible to readily and cheaply manufacture the parts and machine the vanes before assembly of the parts.

I attain the same advantages in constructing the impellers by forming them in two parts, one part consisting of an upper core or shroud with integral vanes, and the other part consisting of a separate sheet metal lower shroud attached to the vanes of the upper shroud, after machining such vanes free of obstructions, by welding or the like.

It has heretofore been the general practice to join the pump bowls by providing the upper ends thereof with integral flanges adapted to be bolted to the bottoms of the adjoining bowls. With such a construction, it has been difficult to provide for snug assembly of the bowls with respect to the impellers.

A still further object of the present invention, therefore, is to provide the outer wall of the bowls with top externally threaded tubular outlets and with the lower portions thereof internally threaded, and providing internally and externally threaded base flanges for the bowls threaded into the latter. These flanges can be readily ad justed into snug relation to the adjacent impellers, and the externally threaded outlet of each bowl may be readily threaded into the base flange or ring of the adjoining bowl or intothe discharge pipe of the pump.

With the above objects. in view, the present invention consists in the novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawings and claimed.

In the drawings:

Figure 1 is a vertical sectional view of the pump section of a deep well turbine pump constructed in accordance with the present invention.

Figure 2 is a transverse section on line 2-2 of Figure 1. I

Figure 3 is a transverse section on line 3--3 of Figure 1; and

Figure 4 is a bottom plan View of one of the impellers with the lower shroud thereof removed.

Referring in detail to the drawings, 5 indicates the outlet pipe or column of the pump to the lower end of which is connected the pump section 6. An inlet pipe I is connected to the lower end of the pump section 6 in the usual way, and a line shaft 8 is suitably journaled in position to extend axially of and through the pump section 6.

The pump section 6 includes a series of impeller bowls 9 connected together, and each of these bowls has an impeller. chamber formed in its lower end. A series of passages connect the outer portion of the impeller chamber with the space immediately above that bowl, which passages are formed by the spaces between radial vanes or ribs l9 integrally formed on an inner wall or core II of the bowl. that the inner wall or core 'has the vanes or ribs I cast integral therewith so as to provide a part separate from the outer wall of'the bowl and secured to the latter by screws or dowels IZa passing through said outer wall and entering the ribs or vanes I0 as shown clearly in Figure 1. Thus, the parts may be readily and cheaply manufactured and assembled, the vanes or ribs l0 being readily machined free of obstructions to flow of fluid prior to assembly of the parts. It 'willbe noted that the vanes or ribs H] are of curved form, the inner wall or core II being of conical form but provided with a cylindrical bottom portion or base I2, and the vanes or ribs It terminating at their lower ends in axially'extending portions I3 which terminate above the bottom of the base I2. The inner wall or core I I of the bowl has an axial bore in which is fitted a cylindrical packing and bearing sleeve I4 formed of rubber and adapted to snugly receive the shaft 8 to prevent leakage of fluid between the shaft and the wall or core II. Retaining rings I5 are threaded into the opposite ends of the bore of core I I against the ends of the packing and bear-.

ing sleeve l4 to retain the same in place within the bore of said core or inner wall II It will be noted that the outer wall of the bowl 9 terminates at the top in a cylindrical outlet portion I6 which is externally threaded, and has a cylindrical lower portion which is internally threaded atits lower end, the purposes, of which will presently become apparent.

Disposed in each of the impeller chambers is one of a series of impellers, and each of such impellers includes an upper shroud I! in the form of a conical disk, and a lower shroud I8, connected by radial vanes or ribs I9 curved as shown in Figures 3 and 4. The spaces between the vanes or ribs I9 form radial discharge passages, but the outer ends of said vanes are provided with axial extensions which abut the axial lower end portions of the vanes or ribs II] of the bowl and which surround the lower portion of the cylindrical bottom or base I2 of the inner wall orcore I I of the bowl. Thus, the liquid is directed axially of the pump or parallel with the discharge line 5 as it is discharged from each impeller into the passages of the bowl thereabove. At the same time, the impellers interfit with the associated inner walls or cores II of the bowl so as to provide a very efficient construction. The upper shrouds I I of the impellers are suitably keyed to the shaft 8 so that rotation of this shaft will be imparted to the impellers. The lower shroud of each impeller consists of a sheet metal shell surrounding and welded to the vanes or ribs I9 and having a cylindrical upper end portion. 2| surrounding the axial extensions 20 on the outer ends of said vanes I9. By making the shroud, I8 separate from the shroud I! and the It will be noted.

integral ribs or vanes I9 of the latter, said vanes I9 may be machined free of obstructions to flow of liquid prior to assembly of the shroud I8 to such vanes I9. At its lower end, each lower shroud I8 is formed with a depending cylindrical inlet member 22, and threaded into the lower end of each bowl 9 is a base or flange 23 which may be adjusted into close relation to the lower shroud I8 of the adjacent impeller. Each base ring or flange 23 is internally threaded as at 24 for receiving the top or threaded outlet member I6 of the bowl therebeneath, or for receiving the inlet pipe I of the pump. The cylindrical inlet flange 22 on the lower shroud I8 of each impeller rotatably fits in the bottom inlet of each bowl to insure axial flow into each impeller. The outlet member I6 of the upper bowl is adapted for threaded reception within the lower end of the discharge line or column 5 as shown.

, From the foregoing description, it will be seen that I have provided a construction and assembly for the pump section of a deep well turbine pump, whereby manufacture is made economical and facilitated. Also, the construction is such as to insure durability and high efiiciency in operation. Minor changes in details illustrated and described, are contemplated within the spirit and scope of the invention as claimed.

-What I claim as new is:

1. In a turbine pump of the deep well type, the combination with a pump bowl having an impeller chamber in the lower portion thereof and inner and outer walls with vanes therebetween forming passages in the upper portion of the bowl extending from said impeller chamber, there being a shaft opening extending through said inner wall, a shaft extending through said opening, an impeller mounted on said shaft in said impeller chamber, said inner wall comprising a conical member having the vanes formed integral therewith, said outer wall comprising a shell separate from the inner wall and its vanes and having a conical upper portion and dowels passing through said conical portion and entering saidvanes for securing said outer wall to said vanes.

2. In a turbine pump, the combination of a pump bowl having an impeller chamber therein and inner and outer walls with vanes therebetween forming passages extending from said impeller chamber, there being a shaft opening extending through said inner wall, a shaft extending through said shaft opening, and an impeller mounted on said shaft in said impeller chamber, said impeller including an upper shroud in the form of a conical disk having integral vanes formed thereon, and a lower shroud separate from said upper shroud and secured to said vanes, said vanes of the impeller terminating at their outer ends in axial extensions, the lower shroud having a cylindrical upper portion surrounding said axial extensions, and the vanes of the pump bowl terminating at their lower ends in axial portions alined with the axial extensions of the impeller vanes, the axial lower ends of the vanes of the bowl terminating above the bottom of the inner wall of the bowl, and the axial extensions of the impeller vanes extending above the upper shroud of the impeller and above the bottom of the inner wall of the pump bowl so that the impeller and the'inner wall of the pump bowl interfit.

CHARLES A. ORLEANS.

Images