US2524770A - Centrifugal ejector pump - Google Patents

Description

@m M 5 w. J. CONERY 9 CENTRIF'UGAL EJECTOR PUMP Filed May 11, 1945 4 Sheets-Sheet l MVEMTQR WILLIAM E. CONfiRY Filed May ll, 1945 W. J. CONERY 2,524WW CENTRIFUGAL EJECTOR PUMP 4 Sheets-Sheet 3 ATTQWNEYEB QM. W WSQ W. J. GONERY Z SMHW CENTRIFUGAL EJECTOR PUMP Filsd! May 11, 1945 4 Sheets-Sheet 4 I ENVENTQW wmmm J. comm E1 Y mm,

Patented Oct. 10, 1950' CENTRIFUGAL EJECTOR PUMP William J. Conery, Ashland, Ohio, assignor to The F. E. Myers & Bro. Company, Ashland, Ohio, a corporation of Ohio Application May 11, 1945, Serial No. 593,212

25 Claims. 1

This invention relates to pumps and, in particular to centrifugal pumps adapted for conversion to deep or shallow well operation.

It is an object of this inventionto provide a self-priming, centrifugal-jet pump adaptable either to shallow well or deep well usage and so arranged that the conversion from one type of well to the other can be accomplished by a very simple structural change.

It is a further object of the invention to provide a novel form of separation or discharge chamber in combination with discharge mechanism for the rotor of the pump and means in combination therewith for directing the fluid discharged by the pump so that it will move through the reentry port and the final exit port with minimum of turbulence, cavitation and circulatory movement.

It is an object of the invention to prevent the free rotation of the pumped fluid within the discharge chamber.

It is a further object to provide means whereby air will be separated from the pumped fluid so that it can rise to the top of the discharge chamber, leaving the main body of the fluid' in the chamber and in the pump rotor and discharge passageways substantially free from air.

It is an object of this invention to provide arrangements whereby the fluid delivered from the discharge casing through the re-entry port into the ejector is substantially air free.

It is an object of the invention to provide an ejector construction in which the pressure of fluid ejected acts as a liquid seal with respect to the air line to a pressure tank, after the accomplishment of a predetermined pressure.

It is a further object of the invention to providean ejector axially aligned with the axis of a rotor and the axis of the armature of the driving motor.

It is an object, in a compact structure, to provide a discharge chamber in which the rotor is located adjacent the semi-circular bottom thereof while being somewhat spaced from the upper portion thereof; and to include in that combination guide vanes and stationary baiiies in order to direct the flow of liquid being pumped as heretofore indicated; and to thereby prevent rotary water movement while eliminating the necessity for a volute casing.

Referring to the drawings:

Figure l is a perspective view of the shallow well arrangement of the pump of this invention showing the pressure tank broken away and the dis charge casing, ejector, and ejector casing in section.

Figure 2 is a similar view of a deep well pump installation.

Figure 3 is a section on'the line 3-3 of Figure 5 looking in the direction of the arrows. Figure 3 shows a construction utilized with a shallow well pump.

Figure 4 is a view similar to Figure 3 showing a construction used with a deep well pump.

Figure 5 is a section on the line 55 looking in the direction of the arrows of Figure 4, illustrating in section the discharge casing, the baflies and guide vanes, the guide casing and the rotor of the pump.

Figure 6 is a similar view on the line 6-6, looking in the direction of the arrows on Figure 4.

Referring to the drawings in detail, I designates a platform or the ground upon which is mounted the pressure tank 2 which contains the pumped fluid 3 and above which is the air space 4. The float 5 mounted on the arm 6 controls a valve 1 which regulates the air passage through the pipe 8, this pipe and its function being more particularly described hereinafter.

The platform I supports the feet or base 9 of the pump discharge casing 16. This casing is semi-circular at the bottom as at H but at the top it is extended upwardly in substantially a rectangular body with rounded'corners at I2 forming an enlarged space l3 above the rotor i l.

The rotor 14 comprises the back plate H, the front plate 19 and the blades l5 therebetween, the blades and plates defining the passages l6 for the flow of fluid through the rotor. The back plate l'l comprises a hub I8 which is internally threaded as at 24 for receiving the threaded end of the rotor shaft 23 which, in turn, is drivingly engaged by the shaft 21 of the drive motor 22.

A liquid tight seal is provided around the rotor shaft 23, between the casing closure wall 25, which forms a part of the supporting bracket 26a for the motor 22, and the rotor hub l8.

The front plate I9 has the annular hub 20 which is received in a correspondingly shaped aperture in the front wall of the guide casing 32.

The aforementioned liquid tight seal consists of ends of the sprin and the abutments thus described and within the spring 29 is a flexible sealing diaphragm 30.

The closure member 25 and bracket 26a are detachably secured by the bolts 3i to the side of the d scharge casing Ill. Mounted upon the inner face of the closure member or plate 25, inside the casing I0, is the guide casing 32. This guide casing is provided with two semi-circular guide ribs concentrically disposed with overlapping ends to form guide passageways for the discharge of fluid from the rotor into the discharge casing l0. These discharge guide vanes or ribs are des nated respectively 33 and 34. The passageways between their overlapping ends are designated 35 and 36. The fluid from the rotor is discharged through the passageways tangentially into the interior of the discharge casing ID with a minimum of turbulence.

If it were not impeded in its circulation, the fluid would tend to rotate within the casing I and to prevent this, there are provided spaced, opposiely disposed, transversely arranged, baiiles 31 and 38 at the bottom of the casing in. These bailles extend transversely into the bottom of the casing l0. They extend upwardly along one wall of the casing l 0 to form semi-circular guide vanes 39 and 40. In this way the pumped fluid is guided as indicated by the arrows in Figure 5. The enlarged portion of the chamber I0 as at I3 provides for the separation of air from the liquid while the substantially air free liquid remains in the bottom of the casing in and a portion of it is discharged through the re-entry opening or port M. The upwardly extending guide vanes 39 and 40 are arranged on the wall of the discharge casing Ill adjacent to the inlet side of the rotor and to the outlet re-entry port 4!, with the result that the fluid pumped is discharged tangentially into the chamber In and then returned 180 upwardly after it impinges upon the baille 31 and the guide vane 39. This serves to free the air from the water and serves to guide and supply air free water into the re-entry port 4!.

The guide casing is provided on one face with a port 42 which is located within the periphery of the rotor. The re-entry port 4! is connected by the pipe or passageway 43 in the casing Illa to the ejector consisting of the nozzle 44 which is spaced from the Venturi tube 45. This spacing of the nozzle and the Venturi tube permits induction of fluid from the well through the pipe 46. The fluid thus induced is delivered into the eye or center of the rotor and thence discharged in the manner heretofore described.

It will be observed that there is a space provided around the inner end of the Venturi tube 45 and inside of the passageway 41 formed through one wall of the discharge casing which forms the entry port.

Communicating with this space is the air pipe 8 which has in it a check valve 48. Up to twenty-five pounds discharge pressure in a typical centrifugal-jet pump the action of the rotor is to pull a vacuum, but after twenty-five pounds the pressure builds up at the rotor inlet, due to the ejector action, and this pressure thereafter seals ofi the valve 48. The fluid discharged from the casing in makes its exit through the pipe or fitting 49 and thence through the pipe 53 into 4 ment. In this way there is a complete seal between the discharge side and the inlet side of the rotor and the discharge casing.

With reference to Figures 1 and 2, it will be observed that the invention is adaptable to either shallow well or deep well pumps. This is accomplished in the conversion from shallow well to deep well by the removal of the detachable casing Ilia and the direct connection of the pipes 43a and 46a into the re-entry port and entry port 4! and Ma respectively. The single drop pipe of the shallow well shown in Figure 1 is removed and the dual drop pipe of Figure 2, including the Jet pump, is substituted.

The fluid discharge through the pipe 43a, in the deep well pump, is conducted through the pipe 55 and thence discharged through the nozzle 56 and Venturi tube 51 upwardly through the pipe 58, thereby inducing the flow from the well through the pipe 59 which communicates with the space 60 between the nozzle 56 and the entry to the throat of the Venturi tube 51.

It will be noted that the arrangement is very simple for either shallow well or deep well operation, no change of the pump in its housing being necessary. A simple interchange of the casing Ilia and associated piping of the shallow well assembly, Figure 1, with the pipes 43a and 46a and associated piping of the deep well assembly, Figure 2, being all that is required for the conversion.

It will be understood that I desire to comprehend within my invention such modifications as come within the scope of the specification and the appended claims.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

1. The combination in a pump, of a vertically disposed, relatively narrow, discharge casing, a vertically disposed pump rotor mounted therein rotatable on a horizontal axis, a guide casing surrounding said rotor and having tangential passageways at the top and bottom communicating with a discharge passageway from said rotor, said guide'passageways being disposed progressively away 'from the periphery of the rotor from the point of inlet to the point of discharge, and baflie means extending between said casings for deflecting the discharge fluid upwardly into said discharge casing, and for preventing rotation of the fluid in said discharge casing in the plane of said rotor, said bafile means comprising vane means extending from the bottom of,said discharge casing upwardly intermediate the side walls of the said casings.

2. In a pump, a discharge casing having an arcuate bottom, a rotor rotatable on a horizontal axis and located adJacent said arcuate bottom and spaced from the top of said casing, a guide casing surrounding said rotor adapted to discharge tangentially into said discharge casing at the top and bottom of said rotor, and vanes lying substantially parallel with the axis of rotation 01 said rotor and arranged between the bottom of said guide casing and the bottom of said discharge casing and forming bafile means preventing rotary movement of the fluid in said discharge casing and around said guide casing whereby the fluid discharged from the guide casing will be deflected upwardly toward the top of the discharge casing.

3. In a pump, a discharge casing having an arcuate bottom, a rotor rotatable on a horizontal axis and located adjacent said arcuate bottom and spaced from the top of said casing, a guide casing surrounding said rotor adapted to dis- 'therearound and will be deflected upwardly toward the top of said discharge casing, and guide vanes between the adjacent vertical walls of said casings adapted to guide the fluid in its travel toward the top of the discharge casing.

4. In a pump, a discharge casing having an arcuate bottom, a rotor rotatable on a horizontal axis and adjacent said arcuate bottom and spaced from the top of said casing, a guide casing enclosing said rotor adapted to discharge tangentially into said discharge casing at the top and bottom of said rotor, baiiie means extending from the front to the back wall of said discharge casing and between the bottom of said guide casing and the bottom of said discharge casing whereby the fluid discharged into the discharge casing will be prevented from rotating around said guide casing and will be deflected upwardly into the top of the discharge casing, guide vanes within said casing between adjacent vertical walls of said casings adapted to guide the fluid in its upward movement within the discharge casing, said discharge casing having a re-entry port near the bottom thereof, an entry port therein opening into the eye of said rotor, a discharge port at the top thereof, and a jet unit communicating with said re-entry port and directed into the eye of the rotor.

5. The combination in a pump, of a vertically disposed discharge casing, a rotor vertically disposed therein and means for driving said rotor in rotation on a horizontal axis; a guide casing mounted within said discharge casing and around said rotor to guide the discharge of fluid tangentially from the periphery of said rotor, spaced baffie and guide vanes within said discharge casing and extending toward said guide casing preventing bodily rotating movement of the fluid around said guide casing, said discharge casing having a re-entry port adjacent the bottom and between said vanes, a jet unit connected with said re-entry port and directed into the eye of said rotor, a suction line connected thereto and a jetdischarge communicating with an entry port in said discharge casing adjacent the eye of said rotor, said discharge casing having an exit port at the top thereof for the discharge of fluid therefrom, whereby the fluid is discharged,

the air is separated from the water, and water is induced to flow from a well through said jet unit;

6. In a convertible deep and shallow well pump, the combination of a discharge casing having a re-entry port adjacent thebottom and an entry port opening through the front wall and a discharge port to service adjacent the top, a rotor within the discharge casing having its eye coaxial with said entry port, a guide casing' enclosing the rotor and located within the discharge casing in spaced relation with the front, side, and top and bottom walls thereof, means for driving the rotor supported on the rear wall of the guide casing, said rotor guide-casing and said discharge casing being arranged in sealing engagement with one another around said entry port, a pump suction line and a jet unit therein connected to said entry port and re-entry port, respectively, and baffle and guide vanes within said discharge casing between the bottom and sides of the guide casing and the discharge casing whereby fluid discharged by the rotor tangentially from the guide casing will be prevented from rotating within the discharge casing by said baflle and guide vanes, said vanes extending upwardly in said discharge casing on opposite sides of said re-entry port to position above and on opposite sides of the axis of rotation of said rotor.

7. In a pump adapted for conversion to deep or shallow well operation, the combination of a discharge casing having a re-entry port adjacent the bottom, an entry port in the mid-port of the front wall, and a discharge port adjacent the top to service, a rotor within the discharge casing rotatable on a ho"lzontal axis and having its eye co-axial with and opening toward said entry port, a guide casing enclosing the rotor and located within the discharge casing in spaced relation with the top, bottom, side and front walls thereof, means for driving the rotor supported on the rear wall of said discharge casing and supporting said guide casing, said guide casing and discharge casing being arranged in sealing engagement with one another around said entry port, a pump suction line connected to said entry port, a jet unit in said suction line connected to said re-entry port, spaced baffle and guide vanes within said discharge casing between the bottom and front walls of the guide casing and the discharge casing, said vanes being on opposite sides of said re-entry port and extending upwardly to points above and on opposite sides of said entry port. said vanes being operable to prevent the fluid in the discharge casing from rotating around said guide casing and to guide the fluid upwardly in said discharge casing, a storage tank connected to said discharge port, an air p pe connected into said discharge casing at a point adjacent said entry port, an air valve controlling said pipe, and a float in said tank controlling said valve.

8. In a convertible deep and shallow well pump, the combination of a discharge casing having a re-entry port at the bottom, an entry port in the center of the front wall, and a discharge port in the top to service, a rotor within the discharge casing, a guide casing enclosin the rotor and located within the discharge casing, means for driving the rotor supported on the rear wall of the discharge casing and supporting said guide casing, said rotor guide casing and discharge casing being arranged in sealing engagement with one another around said entry port, a pump suction line connected to said entry port, a jet unit in said line connected to said re-entry port, baffle and guide vanes within said discharge casing between the bottom and front walls of the guide casing and the discharge casin and extending on opposite sides of said entry and re-entry ports to above the former, the upper ends of said vanes being spaced to permit entr of fluid to said reentry port, the arrangement of said vanes being such that fluid discharged by the rotor tangentially from the guide casing will be prevented from rotating within the discharge casing by said haflle means and guide vanes, a storage tank connected to said discharge port, a float controlled air valve and air pipe connected to a point adiacent the entry port into said discharge casing, said jet unit bein arranged with one end adjacent to said pipe and in spaced relationship to said entry port, and a valvein said air pipe adjacent thereto.

9. In a pump convertible from deep to shallow wells, and vice versajthe combination of a combined air and water storage tank, a discharge casin connected thereto, an air line connecting said tank and discharge casing, a float valve controlling said air line, a rotor mounted within said discharge casing, a guide casing enclosing said rotor adapted to discharge fluid tangentially into said discharge casing, bailjle and guide means disposed in the space between the bottom and front walls of said casings for preventing a rotary movement of fluid in said discharge casing and around said guide casing, said discharge casing having a re-entry port and an entry port, an ejector connected to said respective ports, and a suction line from said elector to a well whereby the movement of fluid from the re-entry port to the ejector and thence to the entry port and into the eye of the rotor of the pump will induce the flow of fluid from the well.

10. In a pump convertible i'rom deep to shallow wells, and vice versa, the combination 01 a combined air and water storage tank, a discharge casing connected thereto, an air line connecting said tank and discharge casing, a float valve controlling said air line, a rotor mounted within said discharge casing, a driving motor for said rotor, a guide casing enclosing said rotor adapted to discharge fluid tangentially into said discharge casing, and baille and guide vanes extending inwardly from the front wall of said discharge casing and upwardly from the bottom thereof for dividing the space between said casings at the bottom thereof into two separate chambers thereby preventing bodily movement of fluid in said discharge casing around said guide casing, said discharge casing having a re-entry port and an entry port, an ejector connected to said respective ports, a suction line fromsaid ejector to a well, whereby the movement of fluid from the re-entry port to the ejector and thence to the entry port and into the eye of the rotor of the pump will induce the flow of fluid from the well, and a pressure switch connected to said discharge casing and to the driving motor for said rotor whereby the operation of the rotor will depend upon the maintenance of an established pressure in said discharge casing.

11. In a pump, a discharge casing having transverse bafiles between the front and back walls of the casin at the bottom thereof, arcuate guide ribs on at least one wall of aid casing and extending upwardly from the tops of said baflles, a rotor, a guide casing enclosing said rotor and having tangentially disposed top and bottom horizontally located discharge passageways,.said guide casing having its bottom in engagement with said baflles and at least one wall in engagement with said guide vanes whereby the rotary movement of fluid from said discharge passageways is interrupted by said baffles and converted into upward movement guided by said guide vanes with any entrained air into the upper part of said casing leavingsubstantially air free fluid at the bottom of the casing; a jet pump, and means for connecting the jet pump to said discharge casing at the bottom thereof and between said bafiies so as to utilize substantially air free water discharged under pressure by said rotor for inducing flow from a well through said jet pump into the eye of the rotor of thepump.

bottom thereof, upwardly extending arcuate' uide ribs on at least one wall 01' said casing having their lower ends connected with the upper ends of said baffles, a rotor, a guide casing enclosing said rotor and having tangentially disposed top and bottom horizontally located discharge passageways, whereby the rotary movement of fluid from said discharge passageways is interrupted by said baflies and converted into upward movement with any entrained air into the upper part of said casing l'eaving substantially air free fluid at the bottom of the casing; said guide ribs being positioned to guide the fluid in its upward travel, a Jet pump, and means for connecting the Jet pump to said discharge casing at the bottom thereof and between said baffles so as to utilize substantially air free water discharged under pressure by said rotor for inducing flow from a well through said jet pump into the eye of the rotor of the pump.

13. In combination, a discharge casing, a guide casing, a rotor rotatably mounted in said guide casing, said casings and said rotor having inlet openings in alignment with each other and leading axially into the eye of the rotor, said casings having a space between them and means sealing Y openings at spaced intervals from each other for uiding fluid as it issues from said discharge means thereby causing fluid to move between said casings and on said opposite sides of said openings and around said sealing means, a plurality of outlet openings in said discharge casing, a jet pump, and conduit means connecting one of said outlet openings .to said Jet pump.

14. In combination, a discharge casing, a guide casing, a rotor rotatably mounted in said guide casing, said casings and said rotor having inlet openings in alignment with each other and leading axially into the eye of the rotor, said casings having a space between them and means sealing said space adjacent the eye of the rotor whereby .to provide for circulation of fluid between said casings except at the eye of the rotor, discharge means in said guide casing for discharging fluid from said rotor between said guide casing and said discharge casing, guide vanes extending between the casings on opposite sides of said inlet openings at spaced intervals from each other for guiding fluid as it issues from said discharge means thereby causing fluid to move between said casings and on said opposite sides of said openings and around said sealing means, a plurality of outlet openings in said discharge casing, a Jet pump, and conduit means connecting one of saidoutlet openings to said Jet pump, one of said openings in said discharge casing forming a mounting for said jet pump.

15. In combination, a discharge casing, a guide casing, a rotor rotatably mounted in said guide casing, said casings and said rotor having inlet openings in alignment with each other and leading axially into the eye of the rotor, said casings having a space between them and means sealing said space adjacent the eye of the rotor whereby to provide for circulation of fluid between said casings except at the eye of the rotor, discharge means in said guide casing for discharging fluid from said rotor between said guide casing and said discharge casing. uide vanes extending between the casings on opposite" sides of said inlet openings at spaced intervals from each other for guiding fluid as it issues from said discharge means thereby causing fluid to move between said casings and on said opposite sides of said openings and around said sealing means, a plurality of outlet openings in said discharge casing, a jet pump, and conduit means connecting one of said outlet openings to said jet pump, said guide vanes having arcuate portions.

16. In combination, a discharge casing, a guide casing, a rotor rotatably mounted in said guide casing, said casings and said rotor having inlet openings in alignment with each other and leading axially into the eye of the rotor, said casings having a space between them and means sealing said space adjacent the eye of the rotor whereby to provide for circulationoffiuid between said casings except at the eye of the rotor, discharge means in said guide casing for discharging fluid from said rotor between said guide casing and said discharge casing, guide vanes extending between the casings on opposite sides of saidinlet openings at spaced intervals from each other for guiding fluid as it issues from said discharge means thereby causing fluid to move between said casings and on said opposite sides of said openingsland around said sealing means, a plurality of outlet openings in said discharge casing, a jet pump, conduit means connecting one of said outlet openings to said jet pump, and baflies forming bases for said vanes.

1'7. In combination, a discharge casing, a guide casing, a rotor rotatably mounted in said guide casing, said casings and said rotor having inlet openings in alignment with each other and leading axially into the eye of the rotor, said casings having a space between them and means sealing said space adjacent the eye of the rotor whereby to provide for circulation of fluid between said casings except at the eye of the rotor, discharge means in said guide casing for discharging fluid from said rotor between said guide casing and said discharge casing, guide vanes extending between the casings on opposite sides of said inlet openings at spaced intervals from each other for guiding fluid as it issues from said discharge means thereby causing fluid to move between said casings and on said opposite sides of said openings and around said sealing means, a plurality of outlet openings in said discharge casing, a jet pump, and conduit means connecting one of said outlet openings to said jet pump, said outlet openings being located adjacent to the top and bottom of said discharge casing whereby a line connecting said outlet openings is located substantially midway between said vanes.

18. In combination, a discharge casing, a guide casing, a rotor rotatably mounted in said guide casing, said casings and said rotor having inlet openings in alignment with each other and leading axially into the eye of the rotor, said casings having a space between them and means sealing said space adjacent the eye of the rotor whereby to provide for circulation of fluid between said casings except at the eye of the rotor, discharge means in said guide casing for discharging fluid from said rotor between said guide casing and said discharge casing, guide vanes extending between the casings on opposite sides of said inlet openings at spaced intervals from each other for guiding fluid as it issues from said discharge means thereby causing fluid to move between said casings and on said opposite sides of said openings and around said sealing means, a plurality of outlet openings in said discharge casing. a jet pump, and conduit means connecting one of said outlet openings to said jet pump, said outlet openings being located adjacent to the top and bottom of said discharge casing whereby a line connecting said outlet openings is located substantially midway between said vanes, said vanes extending entirely across said discharge casing whereby water issuing from said guide casing is caused to turn back on itself and to pass out of said discharge casing through the discharge opening adjacent the bottom thereof.

19. In combination, a discharge casing, a guide casing, a rotor rotatably mounted in said guide casing, said casings and said rotor having inlet openings in alignment with each other and leading axially into the eye of the rotor, said casings having a space between them and means sealing said space adjacent the eye of the rotor whereby to provide for circulation of fluid between said casings except at the eye of the rotor, discharge means in said-guide casing for discharging fluid from said rotor between said guide casing and said discharge casing, guide vanes extending between the casings on opposite sides of said inlet openings at spaced intervals from each other for guiding fluid as it issues from said discharge means thereby causing fluid to move between said casings and on said opposite sides of said openings and around said sealing means, a pinrality of outlet openings in said discharge casing, a jet pump, and conduit means connecting one of said outlet openings to said jet pump, said outlet openings being located on a line extending between said guide vanes.

20. In combination, a discharge casing, a guide casing, a rotor rotatably mounted in said guide casing, said casings and said rotor having inlet openings in alignment with each other and leading axially into the eye of the rotor, said casings having a space between them and means sealing said space adjacent the eye of the rotor whereby to provide for circulation of fluid between said casings except at the eye of the rotor, discharge means in said guide casing for discharging fluid from said rotor between said guide casing and said discharge casing, uide vanes extending between the casings on opposite sides of said inlet openings at spaced intervals from each other for guiding fluid as it issues from said discharge means thereby causing fluid to move between said casings and on said opposite sides of'said openings and around said sealing means, a plurality .of outlet openings in said discharge casing, a

jet pump, and conduit means connecting one of said outlet openings to said jet pump, and baifles extending across said discharge casing and beneath said guide casing, and said vanes being directly connected with said baffles.

21. In combination, a discharge casing, a guide casing, a rotor rotatably mounted in said guide casing, said casings and said rotor having inlet openings in, alignment with each other and leading axially into the eye of the rotor, said casings having a space between them and means sealing said space adjacent the eye of the rotor whereby to provide for circulation of fluid between said casings except at the eye of the rotor, discharge means in said guide casing for discharging fluid from said rotor between said guide casing and said discharge casing, guide vanes extending between the casings on opposite sides of said inlet openings at spaced intervals from each other for guiding fluid as it issues from said discharge means thereby causing fluid to move between said casings and on said opposite sides of said open ings and around said sealing means, a plurality of outlet openings in said discharge casing, a jet pump, and conduit means connecting one of said outlet openings to said jet pump, said outlet openings being located adjacent to the top and bottom of said discharge casing whereby a line connecting said outlet openings is located substantially midway between said vanes, said discharge means in said guide casing for discharging fluid from said rotor consisting of openings positioned to dischage fluid tangentially into the interior of said discharge casing with a minimum of turbulence whereby fluid leaving one of said discharge openings passes in part through each discharge casing outlet opening, and the fluid from the other discharge opening flows around one of said guide vanes, and means for causing the fluid to reverse itself after flowing around said guide vane whereupon said fluid flows out of one of said discharge casing outlet openings.

22. In a jet centrifugal device having a pump, a casing therefor with a plurality of discharge outlets, a receiving chamber for receiving fluid so discharged, a jet, and means for delivering part of the fluid from the receving chamber to the jet and the remainder to service, and means for preventing continuous rotation of the fluid delivered from the pump casing to the receiving chamber, comprising spaced ribs and vertical guide vanes extending toward one of said discharge outlets, said vertical guide vanes extending only a part of the vertical dimension of the receiving chamber.

23. In a, centrifugal pump, an impeller, a casing for said centrifugal pump having a plurality of discharge openings for receiving fluid delivered by said pump impeller, a receiving chamher, a jet connected to said receiving chamber for the reception of liquid therefrom and for forcing liquid to the eye of the impeller, and pipe means connected with a well for delivering fluid to the Jet, said receiving chamber having a plurality of discharge openings, vanes in said chamber, said vanes extending toward one of said discharge openings and on either side of the axis of rotation of the centrifugal pump, and bafiles extending across said chamber, each bame having one of said vanes connected thereto.

24. In acentrifugal pump, an impeller, a casing for said centrifugal pump having a plurality of discharge openings for receiving fluid delivered by said pump impeller, a receiving chamber, a jet connected to said receiving chamber for the reception of liquid therefrom and for forcing liquid to the eye of the impeller, and pipe means connected with a well for delivering fluid to the Jet, said receiving chamber having a plurality of discharge openings, vanes in said chamber, said vanes extending toward one of said discharge openings and on either side of the axis of rotation of the centrifugal pump, said vanes having arcuate portions, said vanes extending only partially across said chamber and converging toward each other at their free ends.

25. In a centrifugal pump, an impeller, a casing for said centrifugal pump having a plurality of discharge openings for receiving fluid delivered by said pump impeller, a receiving chamber, a jet connected to said receiving chamber for the reception of liquid therefrom and for forcing liquid to the eye of the impeller, and pipe means connected with a well for delivering fluid to the jet, said receiving chamber having a plurality of discharge openings, vanes in said chamber, said vanes extending toward one of said discharge openings and on either side of the axis of rotation of the centrifugal pump, said vanes having ends, one of said ends being closer to one of said discharge openings than the other of said ends is to said discharge opening.

WILLIAM J. CONERY.

REFERENCES CITED The following references are of record in the flle of this patent:

UNITED STATES PATENTS Number Name Date 2,077,213 Conery et a1 Apr 13, 1937 2,257,507 Mann Sept. 30, 1941 2,264,953 Regar Dec. 2, 1941 2,274,987 Lung Mar. 3, 1942 2,287,397 Rupp June 23, 1942 2,291,760 Rupp Aug. 4, 1942 2,332,875 Stratton Oct. 26, 1943 2,335,109 Conery Nov. 23, 1943 2,371,019 Badgley Mar. 6, 1945 2,375,571 Mann May 8, 1945 FOREIGN PATENTS Number Country Date 260,417 Italy 1928 404,829 Great Britain Jan. 25, 1934

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