US2150799A - Pumping apparatus - Google Patents

Description

F. JACUZZI PUMPING APPARATUS March 14, 1939.

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March 14, 1939. F, JACUZZl 2,150,799

PUMP ING APPARATUS Filed Oct. 28, 1936 3 Sheets-Sheet 2 23 n INVENTOR.

/Q'RANK Jncuzz/ ATTORNEY March 14, 1939. F JACUZZI PUMPING APPARATUS Filed Oct. 28, 1936 5 Sheets-Sheet 3 INVENTOR. FRANK Jncuzz/ WTORNZYW Patented Mar. 14, 1939 PATENT OFFICE PUMPING APPARATUS Frank Jacuzzi,

Berkeley, Calif., assigner to Ja#- cuzzi Bros. Inc., a corporation of California Application October 28, 1936, Serial No. 107,991

ICIairn.

'I'he invention relates to an hydraulic pumping system wherein a mechanical lift pump is provided above the level of the liquid to be pumped and an injector pump is operative below said level for supplying liquid at the lift pump.

A general object is to provide a system of the class described which is particularly eilicient as a deep well pumping means.

A more specific object is to provide an improved multi-stage centrifugal pump in which assemblies of like members provide the plural stages and may beV readily associated with a basic onestage assembly in any required number to meet diierent lift and/or discharge requirements.

Another object is to provide a vertical shaft multi-stage centrifugal pump having its last stage at the top and providing an internal return Aduct extending downwardly through the pump body to a connection with an injector supply pipe of the system of which the pump is a part.

A further object is to provide a multi-stage pump assembly which is unusually short axially thereof and is otherwise particularly compact.

The invention possesses other objects and features of advantage, some of which, with the foregoing, will be set forth or be apparent in the following descriptionthereof, and in the accompanying drawings, in which,

Figure 1 is an elevation showing an assembly embodying the present system and apparatus installed at a well, certain parts of the apparatus being broken away and/or shown in section.

Figure 2 is a. sectional elevation of a centrifugal pump of the apparatus, certain interior members of the pump structure being differently shown at the different pump stages.

Figure 3 is a fragmentary sectional elevation taken at approximately right angles to the showing of Figure 2.

Figure 4 is a stepped plan section of the centrifugal pump, the steps comprising quadrant views at different levels, the quadrants being respectively indicated as 4a, 4b, 4c and 4d, and the levels of the same being indicated by the same characters in Figure 2.

Figure 5 is a fragmentary underneath view of the centrifugal pump, the view being taken at the plane of the line 5-5 in Figure l.

Figure 6 is a reduced-scale side view of a runner assembly of the centrifugal pump structure shown in Figures 2 to 4.

As is particularly brought out in Figure 1, the features of present invention are shown as applied in a pumping system which is arranged for the lifting removal of liquid from a well through the combined actions of a mechanically operated pump II mounted above the liquid level, and an injector pump I2 which receives its operating liquid from the pump IIand is arranged to re- 5 ceive the liquid from the well for delivery to the pump II.

The injector pump I2 is of the type disclosed in United States Patent Number 1,758,400 which issued to R. Jacuzzi on May 13, 1930, and essen- 10 tially comprises a structure wherein a nozzle I3 discharges a jet of liquid axially into an eductor tube I4 providing the outlet from a chamber I5.

The chamber I5 receives liquid from the well through a suitable one-way foot valve I3, and the 15 stream from the nozzle induces and entrains a stream of liquid through the chamber I5 for delivery to the pump with it. The injector I2 receives the operating stream through a supply pipe I1 and discharges the combined streams 20 through/a riser pipe I8,

Essentially, the pump II comprises a plurality of centrifugal runners 2l nxedly mounted on a vertically disposed shaft 22 and operative in a like number of chambers in the pump casing to 25 progressively advance the pumped liquid upwardly through the pump when the pump shaft '22 is rotated. The pump casing is generally cylindrical and comprises a base section 23, a head section 24, and a plurality of like stage sections 30 25 engaged between the sections 23 and 24. An upward extension 26 of the head section 24 is formed to provide a supporting bracket for an electric motor 21, said motor having its shaft 28 attached to and supporting the runner shaft 22 35 at a suitable coupling 29. The precise manner` of drivingthe shaft 22 is generally immaterial, however, :It being understood, for instance, that a pulley shaft might be provided in lieu of the motor as a means for driving the shaft 22. v

As shown in Figure 2, tubular bearings 3l and 32 are provided for the shaft 22 in the casing members 23 and 24 respectively. The bearing 3| comprises a sleeve fixed in a tubular and depending extension 33 of the member 23, the bore of 45 the extension 33 being closed at its bottom by means of a screw plug 34 which is spaced below the lower shaft end to provide a cavity which may, if desired, contain a lubricant for the shaft. The bearing 32 comprises a stuffing box for seal- 50 ing the bore thereat while centering the shaft 22 therein.

By reference to Figure 2, it will be seen that the member 24 is cylindrically recessed from its lower face to ttedly and iixedly receive a gen- 56 erally disc-shaped member 35 with the bottom faces of the two members mutually ush. 'I'he member. 35 is cylindrically recessed from its lower face to provide a chamber 36 in which the upper runner 2| is operative in a manner to be hereinafter described. The upper face of the underlying casing member 25 is sealedly engaged with the mutually coplanar annular lower faces of the members 24 and 35 and denes the lower wall of the chamber 36.

'Ihe various runners 2| are of like size and structure, each runner comprising a disc-shaped upper wall 31, a lower wall 38, and curved webs 39 integrally connecting the walls 31 and 38. 'I'he upper runner wall 31 is fiat, is centrally perforated to fittedly receive the shaft 22 therethrough, and is provided with an annular hub 4| extending transversely thereof and along the shaft whereby the mounted runner may be retained in fixed angular relation to the shaft. The lower runner wall 38 has a planar outer portion from which the inner wall portion slopes conically downwardly to a central opening 42 which comprises the bore of a tubular apron 43 integrally depending from the inner edge of the wall 38. The apron 43 extends freely through a circular opening in the top wall 44 of the underlying member 25 or of the member 23, as the case may be. Preferably, and as shown, the webs 39 are curved rearwardly from their inner ends, and the passages dened between adjacent webs are of smallest cross-section at the discharge ends thereof.

By particular reference to Figures 2 and 3 and 6, it will be noted that the shaft 22 is stepped outwardly above the hub 4| of the upper runner 2| to provide an annular shoulder 45 between which and said runner hub a spacing ring 46 is operative. With the shaft 22 xed against axial shifting with respect to the pump casing assembly, and the ring 46 engaging the shoulder 45, and the hub 4| of the upper member 2| engaging the ring 46, the upper runner is arranged to be axially centered in the upper runner chamber 36. Spacing sleeves 41 are engaged between the hubs 4| of succeeding runners on the shaft 22, and a nut 48 threadedly engages the shaft beneath the hub of the lowermost runner for clamping the runners and sleeves in their line on the shaft 22. The reduced shaft portion below the threads which mount the nut 48 is engaged in the sleeve bearing 3|.

Each intermediate casing sectionA 25 has a top end wall 44 and a depending peripheral wall 49 which together define a downwardly opening chamber for receiving a member 35 which in turn provides a downwardly opening runner chamber 36-as in the assembly of the casing section 24. In this manner, the members 35 and runners 2| may each be alike, this being an important factor for minimizing the production cost of the pump while providing for a pump assembly with any desired number of stages; in the present instance, a three-stage assembly is shown, and it`will be noted that the casing sections 23 and 24 may be directly engaged about a single runner 2| to provide a single-stage pump.

The lower 'casing section comprises a circular plate 5| which is centrally perforated to receive the apron 43 of the adjacent runner 2| and has its upper face otherwise formed as are the upper faces of the top walls 44 of the sections 25. The plate V5| may rest on top of a foundation 52 surrounding the upper end of a tubular well casing 53 as is particularly illustrated, or even on top of the casing 53 itself, whereby to support the pump assembly in position for its use. Bolts 54 extending axially though the various pump casing sections provide a knock-down assembly of the pump to have a desired number of stages, the arrangement being such that the bolts 54 and the shaft 22 are the only elements which need be different for assemblies to provide different numbers of stages.

It will now be noted that the members 35 are provided with a plurality of equally spaced discharge openings or ports 56 which are directed tangentially forwardly through the circumferential Wall of the chambers 36 in the central planes of the chambers, the present structure having eight discharge ports 56 in each member 35. Each of the ports 56 has a cylindrical inner portion and a flaring outer portion whereby these ports may be generally classified and referred to as Venturi orifices. Peripherally thereof, each member 35 is notched out opposite the discharge end of each port 56 whereby the member is generally star-shaped in plan with its extreme points tightly engaging the circumferential wall of the casing cavity which receives it, the latter cavities being provided in the top casing section 24 and in the stage sections 25. The members 35 are preferably arranged for a press t in their mounted positions in the sections 24 and 25 for retaining them in their appointed places.

Preferably, and as shown, the peripheral notches of the members 35 are defined by flat sides 59 and 6|] which are perpendicular to the plane of the members and cooperate with the opposed casing wall portions to define laterally closed riser passages 6|. 'Ihe ports 56 terminate intermediately in the notch sides 59, and the latter sides are perpendicular to the longitudinal axes of the ports which terminate thereat. Each notch side 68 is substantially parallel to the axis of the adjacent port in advance thereof. In the present instance, a plan section of each riser passage 65 has the general form of an obtuseangled triangle having its larger angle at the juncture of the notch sides 59 and 60, as is particularly evident in Figure 4.

Intermediate its ends, each member 35 includes a cross wall portion 63 whichprovides the top wall of the runner chamber 36 of the member, said wall 63 being centrally perforated to rotatably receive the runner assembly thereat. Curved and radial ribs or fianges 64 extend upwardly from each plate 63 to define the top plane of the member 35 and engage against the upper walls of the chambers which receive the members. The ribs 64 extend inwardly from the points of the members 38 and terminate adjacentJand externally of the runner aprons 43. Preferably, and as shown in the quadrant 4b of Figure 4, the ribs 64 have straight outer portions which are parallel to the adjacent notch faces 59 and arcuate inner portions which are directed radially of the runner axis at their inner extremities; the aforesaid rib portions are of substantially like lengths. In this manner, liquid flowing upwardly in the riser passages 6| of a given stage is directed inwardly over the top of the wall 63 and radially beneath the intake opening or eye provided by the apron of the runner above the wall.

It will' now be noted that the casing section 24- provides the upper, and last, pump stage, and is provided with an external delivery, or discharge, outlet-.opening 65. As shown in Figures 1 and 2 and 4, the section 24 is formed with a radial extension 66 having the discharge opening 65 extending axially therethrough. the' bore 'df said opening being threaded for the connection therepressure at the pump side of the valve 68 for set-I ting said valve. To facilitate the ow of liquid over the member in the/section 24 to the discharge outlet, an annular groove 12 may be /provided in the under face of the top Wall portion of the section, said groove and outlet forming parts of a discharge chamber 13 within thel casing section. i 1

An intake cavity 14 is defined in the pump base section 23 below the wall 5I of the section, and an inlet opening 15 is provided in the under wall of said cavity, which wall provides the bearingreceiv'ing extension 33. A threaded pipe' flange v16 is bolted to said under wall of, the section 23 with its bore in registration with the opening 15, and the riser pipe I8 is threadedly connected to said flange. The described connection for the pipe I8 is laterally oifset from the bearing extension 33 which carries the bottom bearing sleeve 3 I, said sleeve extending slightly within the cavity 14 and being generally encircled by the cavity.

Preferably, and as brought out in Figure 3, the nut 48 of the runner assembly is provided with a depending skirt 11- whichv closely encloses the upper part ofthe sleeve 3| when the runner assembly is operativelyA installed in the pump structure. In this manner, the bearing bore of the sleeve 3l is protected from the intrusion of particles of grit which might be carried through the pump with the liquid being pumped.

It will now be noted that the water for operating the injector I2 is arranged to be taken from the discharge stream of the pump II at the pump side of the back-pressure valve 68 whereby an adjustment of the valve 68 will provide the injector-operating stream at the required pressure. Generally speaking, a greater pumping lift requires the greater pressure and/or greater volume flow of operating liquid to the injector, this resulting in a lessened volume of ow from the discharge pipe 61. The pipe 61 may discharge at the level of the valve at atmospheric pressure or against a lifting` head, as required, the valve 68 being suitably adjusted and set to meet the conditions.

As particularly disclosed, the injector supply pipe I1 receives liquid from the pump discharge chamber 13 through a passage 18 which axially traverses the casing, the pipe I1 being connected with said passage at the bottom of the casing base section 23. Considering the assembled pump casing as a whole, the passage 18 is seen to be provided in a. lateral rib-like extension 19 which is provided in part by the various casing sections, the line of its passage being shown as intersecting the line of the discharge opening 65 within the chamber 13. At its portion'within the bottom casing section 23, the passage 18 is directed radially inwardly and then axially downwardly whereby the pipe I1 may be connected to the section adjacent the depending bearing extension 33 of the section, and within the space of the well casing 53. As shown, the necessary connection is provided by means of a threaded pipe flange 88 which is mounted on the upper end of the pipe I1 and is bolted to the under side of the section 23. It will be noted that the radial portion of the passage 18 is generally coplanar with the pump intake cavity 14.

The provision of the passage 18 within the casing structure is important for several reasons, including lthe following. Thus, the feature permits m unting of the pump structure directly at the top of the well casing to overlap the casing all around, with all parts of the pipes I1 .and I8 disposed below it and within the casing space, thereby eliminating any need for lateral connections through the side of the well while minimizing fluid friction in the pipes which may both be straight for their full lengths. Another advantage of connecting both pipes directly at the casing section 23 lies in the fact that these pipes need not be changed in lengthias stages are added`t or subtracted from' thepump assembly.

While such is not shown, it will be understood Y that the pump discharge outlet 65 might be provided anywhere along the passage 18, as in a section 25 or in the base section 23 without affecting the operation of the pumping system; in this event, the passage 18 would comprise ypart of the pump cavity 13 as far therealong as the outlet 65 is provided. On the other hand, the outlet 65 might be'provided at some other point of the casing section 24 than at the upper end of the passage 18.

'I'he described structure wherein the separately formed members 35 are in unitary but separable association with the pump casing sections 24 and 25 is designed to provide for a machining of the surfaces of the members 35 and the .provision of the Venturi orifices 56 therein withv Ioperated at an appropriate rotative speed by the motor 21 or otherwise, and that an appropriate pressure exists in the discharge chamber 13 of the pump II, a branch discharge stream will be continuously forced downwardly through the passage 18 and pipe I1 to the injector nozzle I3. As previously noted, the stream discharging upwardly from the injector nozzle I3 will entrain water from the chamber I5 of the injector, and the combined streams will fiow upwardly to the intake chamber 14 of the pump II whence it will enter the eye of the lowermost member 2| for centrifugal discharge radially into the central runner chamber 36 of the lower member 35;

The Water centrifugally discharged into the chamber 36 will. acquire an increased pressureover that at intake, and will discharge under pressure tangentially outwardly through the Venturi orifices 56 and into the riser passages 6I and thence over the top of the member 35 to the eye of the overlying runner for a repetition of the process for the full number of runners. The described cooperation of the runners 2l and the members 35 is repeated for all of the stages provided, whereby the pressure in the wate'r traversing the pump is progressively built up'to a maximum in the chamber 13, a portion of the water escaping through the pipe 61 and the remainder being used over again to operate the injector. It will be understood that the action duces at least some degree of suction in the the top ribs 64 of the member 35 which encloses the runner, is designed and arranged to minimize frictional losses in the pump. It is noted that the action of the runners 2l in combination with that of the Venturi orifices 56 is generally that disclosed in United States Patent Number 1,929,496 which issued to R; Jacuzzi on October 10, 1933.

It will be understood that the runners 2| may have different numbers of radial passages and that the number of Venturi orii'lces in a ring thereof may be varied for meeting different operating conditions to be met, it being generally important only that the plurality of said orifices and passages of a given stage be symmetrically arranged about the runner axis. Generally speaking, the capacity of the pump assembly will be increased with an increase in the number of stage `sections `25 inserted between the base `section 23 and the head section 24. It will also be understood that the required rotative runner speed for removing water from a given well will be less as the number of stages is increased; 1n

, this manner, the present multi-stage pump may be provided withthat number of stages which permits its operation at a speed which will minimize pump wear Without materially eiecting the pump eiciency.

From the foregoing description taken in connection with the accompanying drawings, the advantages of the construction and method of operation of the present device will be readily understood by those skilled in the art to which the invention appertains. While I have dechanges may be made as fall within the scope of 5 the following claim.

I claim:

In combination with an injector pump installed within a bored Well to lift liquid from the well,

a vertical shaft centrifugal pump supported to l0 have its bottom extending across the top of the Well bore and arranged to receive liquid from the well through the discharge pipe of the injector pump and comprising a casing having a base section providing an inlet passage at its bottom, 15

intermediate and head casing sections providing similarly directed and mutually aligned cylindrical recesses opening at the lower ends thereof, similar members ttedly engaged in said recesses and recessed from the same sides thereof as the 20 casing sections to provide cylindrical chambers therein opening at the corresponding section ends and each having a plurality of discharge ports directed tangentially from the periphery of its chamber through its lateral wall, runners simul- 25 taneously operative in said chambers and arranged to receive liquid axially thereof, means at the peripheral and upper exterior of each said member directly cooperative with the opposed walls of the member and the recess ref'- 3o ceiving it to provide independent passages for directing the liquid vdischarged from its ports to- .f-

Ward the pump axis and to the next run means providing a discharge passage Tir the centrifugal pump in said head section, means necting said outlet with the nozzle of the injector 40 4 pump.

FRANK JACUZZI.

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