US2387377A

US2387377A - Deep well pump

Info

Publication number: US2387377A
Application number: US524710A
Authority: US
Inventors: George F Wislicenus
Original assignee: Worthington Pump and Machinery Corp
Current assignee: Worthington Pump and Machinery Corp
Priority date: 1944-03-02
Filing date: 1944-03-02
Publication date: 1945-10-23
Anticipated expiration: 1962-10-23

Description

*Oct 23, 194577 G. F.`wlsl lcENus DEEP WELL PUMPV .Filed March 2, 1944 IN VEN TOR 7 7 577,7705/7 5 77 057877 j a 25m2 ATmRNEY arationljoflthe casing.

Patented occasion UNITEDSTATE suchuasfdeepwwell and` sumpipumps. and more particularly to a novelcasing and rotor structure An object ofthe present invention isto provide `a centrifugalmachine of the multistae type in whichwjthercasing and rotor thereof are of such was utc permit axialremovalof the rotor intact the "casing without necessitatingsepo `Arrothenobiectis toprovide a centrifugal machine@oflgthe` multistage `type wherein both the wins andthe reformer respectively comprise l unitary structure, and in whichthe rotor maybe removed "intact from c the `casing without neoeesitatingdismantlingof the rotor or separa-l tion ofjthecasing. L l l o n Another object is to provide a deepwell pump of themultistage type which is of such design as to eliminatethci necessity of a large number of bearingsfor supporting the rotor in-the casing.

f` `Anothex'l object is tcprovidea centrifugal ma- A`chine lof;` the multistage typehaving a rotor prowith "huid denecting vanes 'coasting with body structure ofthe rotor in `auch manner as to function asstrut means forresisting denection objectfis to provide a casing and `a rotor for aoentrifugal machine of the multistage typeinwhich theconstruction is such that the ninningiointsof both parts may be machined in onesettingtc automatically assure .i alignment.

obiect is to provide a centrifugal machine of i the multistage 'type wherein mechanically thestructureischaracterized by a simpli- Uiioation in comparable to that of-a single ltlo"`vmachinei. n u n c withtbeseyandother objects in view, asmay appear from the accompanying specincation, the invention ofvarious features of constructionf'and combination of'parts. which will bem-st in connection with thefaccompanying drawing. showing a deep well pump of a preferred the invention. and the features invention will be speoioally Poinkd llgurei is a longitudinal dus il Flgurellisa longitudinalsectional and elevational ofamodined form of pump structure.

o o view ofte. lpump inaccordance with the present @more b particularly to thedrawing.

yi` a` deep well, pumpcomprising a eating" withinwhichh containedsa rotor Il.`

bowls or sections i2,`a bottom end section il and a discharge cone or top end section I4,all of which are, arranged end to end.` Bolts Il extend through flanges It on the bowls I2,`the`section `I2 and the discharge cone Il for connecting `thel parts into a, unitary structure. The section i3 is internally threaded'at I8 for` connection with the III ymay be built in any number of stages by merely assembling and securing together the requisite number of bowls.

All the bowls I2 and the discharge cone Il have inner faces Il arranged concentrically of the axis l of the easing lland extending `360 degrees there` about. These faces are of curved or concaved contours when viewed according to Figure 1. In` 'c `side the respective bowls [I2 and the `discharge cone "Il are mounted wearing or shroud rings 2li which are arranged in co'-`axialre1ationship at the axis of the casing I0. The wearing rings are of `smaller outside diameters than the inside die ameters of thebowls i2 and the discharge cone Y .il andhave curved or convexed outer faces 2l` spaced fromthe faces I8 to provide stage fluid es 22. n n

As will "be 4noted by reference to Figure 1, the fluid passages 22 are curved or `generally U- shaped in cross sectionand have fluid inlets 231 and iluid outlets 24 opening through. the inside` annular contour of the casing for communication with the rotor containing chamber of the casing. Means for supporting `the wearing rings 2li comprise guide varies-25 which'` arearrangedin the respective fluid passages 22 and are -integralwith` the wearing rings andthe bowls I2 and the dis-` charge cone Il. n o i To the bottom end of inside `diameterof the section il to define a fluidv passage-which isannular in cross-secs" tion.` Inlet guide vanes 22 provide support for the bearing 21, `these vanes beingintegralwith `the bearing and the end section il. The bearing ingl2'l is externally contoured to present a smooth ream ilowing through the meen the nuid 'assu-n i n f i n i U 1 c 1 f `George F. Wislicenus. Summit, N. .Lalligncrto x w rthingtonlumpandMachineryCorporac `tl`n`,Harrison,1N.J.,acornorationof Delaware n rf'imaginaisnMarron2.1944.sermi1v,sz4,'1io` c t c o -soialma (cries-1oz) Q i invention relat'eslil.renleifuwl` machines the rotor ii isattaached` w a cofaxial shaft 26 which is supported for rota- M tion ina bearing 21. @This bearing is arranged"` c concentrically: with and inside the end section i2 and is of smaller outside diameter than the c Additional support is provided for the rotor by a second bearing 30 mounted in an inner cone` 3| which is fixedly related to the discharge cone |4 by'g'uide vanes 32. The vanes 32 are integral with the inner cone 3| and a ring 33 atv tached to the discharge cone I4. rI'he upper end of the rotor is attached to the Ausual drive shaft 34. The shaft 34 is co-axial with the shaft 26 and is supported for rotation in the bearing 30. The shaft 34 extends upwardly to any approved type of driving head (not shown) and may be connected with any suitable source-of power. Y

The inner cone 3| is of smallerdiameter than thel discharge cone I4 to provide a fluid passage 35 which places the last stage fluid passage 22 The ye.4| of the first stage impeller 36 com' municates with the annular passage 28, and the fluid passage 40 discharges into the inlet 23 of n the firstgstage fluid passage 22. Fluid deflecting vanes 42 arearranged in the passage 4 0'and are integral .with the body 31 and the shroud ring 38 'to connect the parts into a unitary structure.V

The remainingV impellers 36 respectively comprise hollow bodies `43 which are open at their ends andannular in cross-section. An annular flange 44 is formed on the end body 31,. within which is inserted an end of the second stage body 43. Bolts 45 iixedly connect the end body 31 withfthe second stage body 43. The third, fourth, and'fifth` stagebodies 43 are` fitted inside annular vflanges 46 on the second, third, and fourth stagebodies 43, respectively, and the abutting bodies arefixedly related one with the other by bolts 41.

All the bodies 43 are constricted intermediate their ends so that, because of the spool-like contours of the bodies, each body 'is characterized by a channel or groove`48 extending circumferentially 360 degrees about the body. Shroud rings 48 encircle the respective: bodies 43 and are tions thereof which lie in the inlets 52 and the outlets 53, make the rotor II very bending-stiff without depending in any way on shaft stiffness, since the vanes form a continuous mechanical structure of large diameter. Thus the vanes 54 function additionally as strut means co-acting with the impeller bodies 43 and the shroud rings 49 to resist deflection of the rotor. With this form of construction, a central shaft becomes actually unnecessary, the

shafts

26 and 34 being employed for bearing purposes only, in addition to the 'driving function of the shaft 34.

The en cl body 31 and the bodies 43 are respectively provided with wearing surfaces 55 of a common diameter. The wearing surfaces 55 lie in the planes of and in co-active relationship withthe wearing surfaces or inner faces 56 of the wearing rings 2|). All the wearing surfaces 56 are alsoof a common diameter.` Similarly, the

shroud rings 49 andthe shroud ring 39 are provided with wearing rings 51`having'the same-f.-

outside diameter as the Wearing surfaces 55. All the wearing rings 51lie in the planes of and in co-aotive relationship with the respective wearing surfacesv58 comprisingfthe inner facesof necks 59 to which the flanges `I6 are attached. The wearing surfaces 58 are of the'same diameter as the Wearing surfacesv 56.

spaced from the faces of the bodies defining the channels 48 to provide iiuid passages 50 extending Vcircumferentially 360 degrees about the axis of the rotor The inner faces 5| of the shroud rings are convexed in cross-section and are curved in conformity with the curvature of the channels 48 so that the rfluid passages 50 4are of curved or generally U-shaped contourin cross-section. 'I'hustheV respective fluidpassages 50 have inlets 52y and outlets 53 opening through the annular perimeter of the rotor. vThe inlets 52 and outlets 53 are arranged in communication with the outlets 24 randthe inlets 23, respectively so that thefluid passages 50 are in series communication with the fluid passages A22;-

Means for supporting the shroud 'rings 49 comprise fluid deectlng vanes`54 arranged in the respective `fluid passages 50.

integral with rthe bodies 43 and the' shroud rings 49 and are of the combination inward flow and outward flow type, such as are disclosed in an application for patent on Rotor filed on even date herewith. Accordingly, the vanes 54 extend from end to end of the respective passages 50.

Provision of the vanes 54, particularly the por- These vanes arev The wearing surfaces 55 and the wearing rings 51 are of diameters at least equal to thefoutside diameters of the respective impellers 36, and the wearing

surfaces

58 and 60 constitute the smallest inside diameter of the casing. Accordingly the rotor may be axially removed intact from the casing I0 without removing or opening any stationary parts except the inner cone 3 I, or the end section I3 if the rotor is removed through the upper end of the casing. The casing I0, which contains'all the stationary passages, need not be parted either in the plane of or at right angles to its axis. In addition, the running joints in the casing as well as onthe rotor lcan be machinedl in one setting to automatically assure perfect alignment. 'I'he rotor may also be dynamically balanced as a whole. The machine herein described is completely devoid of any stationary parts which reach between the impellers of the` individual stages.

'I'he shroud ring 2| in the discharge cone I4 differs somewhat from the remaining shroud rings 2|, in that this shroud ring is provided with a` wearing ring 60 of considerable length, and the wearing surface 55 associated with this ring is also of a greater length than the remaining wearing surfaces 55. This wearing ring ts'over the base end of the inner cone 3|. fitted inside the anges 44 von the last stage body 43 and is securedl thereto by bolts 62. A bushing 63 is mounted on the shaft 34 inside the bearingy 30 and is interposed between the end body 6| and. an annular shoulder 84 on the shaft 34, the latter c extending through a bore 65 in the end body.` fA- nut 68 is threaded on the shaft 34 and bears.:

i against the end body 6| to clamp thebushing 63 lsxtween theend body and the annular shoulder .While Figure-1 illustrates both the casing I0 yand the rotor I I as being ofsectional construction,

Figure 2 illustrates a centrifugal machine wherein the casing I0' and the rotor I are respectively of unit construction. In .other respects the two` pump structures are identical so` that similarv reference characters are applied to corresponding parts, with the exception that the reference char-v -acters arprimed in Figure 2. Although the axi- An end body 6| is yg assured the casing,"the running clearances between the claims rally removablerotor permits the `use *ofla one-` pieceoasing, there arecertain advantages in buildi inglup the casing from individual and `small castuch' advantages reside in thesimplification sages, and thelexact stagedistances are aboutthef axis of that part and are curved int wardyto Place ,their ends in communication with pr niaclninlg the* mdividuarcasingpieces before "assembling the pieces inte a finished [casing structure. Finalr machining `of the casing 1 l isdonewafterfthecasin ipieces" have been con` nected together.,

therotor chamber. Similarly, the vfluid passages y in thegrotor part respectively extend" 360 degrees i aboutth axis,` of thewrotorlandare curved out-` wardlyto open through the varnularperimeter of g the" rotore The l fluid passages in4 the rotor and the casino`glare` inendwise and series communicationbne with the o other; toi provide 4a continuous passage, extending" from fthe" suction inlet 28 to t the `iiisallarga as er the machine.

Beeauselofthe reversed curvature of thecas` ingpassfagesf withrespect td the-rotor passages, the fcontinuouspassage isfof sinuous contour in section, but annular in `cross-section.

latitude t Whlethe continuous, passage iswavy, i; e., wind-f in and 'outE with respect `to both'the rotor and rotor `and `thecasing are sdarranged'as to isolate the` rotor passagesone fromwthe other, which is also true of theocasing passages. buteffectively connect` the,` rotor passages` with the `casing pasremcval of `the rotor.

twill bei l tothespecic construction or arrangementlof, partsshown, but thatthey may be widely modified` within`t`lthe invention defined by `the whaistmaeais i i 1 v. t l,` In a@deep,vvell` pump, the combination of a a x'otorA infsaidtchamberyand having annular and o axially spaced stage fluid passages each opening endwise `only throughthe `annular perimeter of t o, the rotonsaid casing and rotor fluid passages havlng endwise and series communication one with theyother `to provide a continuous fluid passage extending from the flrst stage through the latter o stageof the pump, fluid deflecting vanes in said i second mentioned fluid passages, said casing comprising connected undivided bowl portions each t containing one of said casing fluid passages, and

said `rotor comprising connected undivided impeller bodies each containing one of said rotor fluid passages. i o 2. In a deep well pump, the combination of a casing having a rotor chamber and annular and axially spaced stage fluid passages each having `j endwise communication only with said chamo ber, a rotor in said chamber `and having annularjand axially spaced `stage `fluid passages o each opening endwise only through` the annular perimeter of the rotor, said casing and `rotorfiuid passages having endwise and series l o sages,`i`n addition to permitting unobstructed axial derstood thatthe invention is not to` 1440 and a discharge, said casing having a rotor cham. o ber `andl axially spaced annular faces arranged' o concentrically of the axis `oi? saidchambeir., said o f "casinghaving arotor chamber andannular and o o t `a`.`xial1y` spacedustage `fluid passages eachhaving o endwise communicationonly o with` said chamber,`

fluid passages, said casing comprising connected undivided bowl portions each containing one of said casing fluid passages, said rotor coinprising connected undivided impellerbodieseaoh containingone of said rotor fluid passages, said casing having` a discharge cone, a cone shaped,

bearing xedly related to said casing and spaced casing having a rotor chamber and annular and axially -spaced stage` fluid passages `each havigf. endwise` communication onlywith said chamben, o a rotor in said chamber andhaving, annular. and'v 5 axially spaced stage fluid passages eachopening endwise only through the annular perimeter oflf the` rotor, said casing and rotor fluid passages having endwise and series communicaticnjone4 with the other to provide a continuous fluid passage extending from the first `stage through the` latter stageof the pump, fluid delecting venes in said second-mentioned fiuid passagessaid`casing comprising connected undivided bowl portions each containing one 0f said casing fiuid passages, said rotor comprisingiconnected undivided lmft peller bodies each containingone `of `said 'roten` o fluid passages, said casing 'having a discharge cone,` a coneshaped bearing xedly related to y.

said casing and spaced therefromuto provide an" annular fluidl discharging passage between the discharge cone and `the cone shaped bearing,,a` shaft fixed to Asaid impeller and extending'through` saidcone shaped bearing. a second bearing fixedly related to `said casing and spaced therefromV to provide ,arflvuid` inletpassage annular` in cross" section, a headilxedto said rotor, and a shaft attached to said head androtatably supported. in said second bearing.

. 4. In a centrifugal deep wel1`pump, the combi- 4 nation of a casing provided ,with a suction inlet annulary faces being concaved in `cross section,

tion only with said chamber, guide vanes in said fluid passages and fxedly relating the casing shroud rings to said casing, a rotor in said chamber and having channels extending circumferentially of the rotor and being concaved in cross section, rotor shroud rings having convexed faces spaced from the faces of said channels to provide stage fluid passages curved to open endwise only through the annular perimeter of the rotor, uid deflecting vanes in said rotor fluid passages and flxedly relating the rotor shroudrings to said rotor, said casing fluid passages being reversely curved with respect to said rotor fluid passages and having endwise and series communication therewith to provide a continuous passage sinuous in longitudinal section and extending from said suction inlet to said discharge, said casing shroud rings and rotor shroudrings having wearing surfaces, wearing surfaces on said rotor arranged in co-active relationship with the wearing faces on said casing shroudv rings, wearing faces o on said casing arranged in co-active relationship with the wearing faces on said rotor shroud rings, said rotor being of such contour with respect to the contour of said chamber as to 4be axially removable therefrom while in assembled condition, said casing comprising undivided bowls Joined one with the other in the respective planes of the rotor shroud rings.

5. In a centrifugal deep well pump, the combination of a casing provided with a suction inlet and a discharge, said casing having a rotor chamber and axially spoced annular faces arranged concentrically of the axis of said chamber, said annular faces being concaved in cross section, casing shroud rings having convexed faces spaced from the respective annular faces to provide stage iluid passages curved for. endwise communication only with *said chamber, guide varies in said fluid passages and ilxedly relating the easing shroud rings to said casing, a rotor in said chamber and having channels extending circumferentially of the'rotor and being concaved in cross section, rotor shroud rings having convexed faces spaced from -the faces of said channels to provide stage uid passages curved to open endwise only through the annular perimeter of the rotor, nuid deilecting vanes in said rotor iluid paages and fixedly relating the rotor shroud rings A,to said rotor, said casing iluid passages being reversely curved with respect to said rotor fluid passages and having endwise and series communication therewith to provide a continuouspassage sinuous in longitudinal section and v y from said suction inlet to said disrings having wearing surfaces, wearing surfaces'- onsaid rotor arranged in co-active relationship with-.the wearing faces on said casing shroud 141.188.. wearing faces on said casing arranged in co-active relationship with the wearing faces on said 'rotor shroud rings, said rotor being of such contour with respect to the contour of said chamberas to be axially removable therefrom while in assembled condition, said casing comprising un- \divided bowls joined one with the other in the respective planes of therotor shroud rings.` said rotor comprising' undivided impellers of spool- 'like contour'and joined one with theotherin endwise relationship in the respective planes of said casing shroud rings.

6. In a centrifugal deep well pump, the combinatibnrof a casing having a rotor chamberando l "annular and axially spaced stage iluid each having endwise communication only witii said chamber, a rotor in said chamber and hav' ing vannular and spaced stage fluid paspassages assasvv sages each opening endwise only through the annular perimeter of the rotor, said casing fluid passages Vand rotoriluid passages having endwise and series communication one with the other to provide a continuous iluid passage ex. tending from the rst stage throughthe last l bination of a casing having a rotor chamber and annular and axially spaced stage fluid passages each having endwise communication only with said chamber, a rotor in said chamber and having annular and axially spaced stage uid passages each opening endwise only through the annular perimeter of the rotor, said casing iluid passages and rotor fluid passages having endwise and series communication one with the other to provide a continuous uid passage extending from the rst stage through the secondstage of the pump, fluid deflecting vanes in said rotor iluid passages and extending substantially from end to'end of their respective passages, said rotor comprising undivided spool-like bodies arranged end to end, means for connecting said bodies into a unitary structure. each of said bodies containing one of said rotor iluid passages, andsaid rotor being of such contour with` respect to the contour of said chamber as to be axially removable therefrom while in assembled condition.

8. In a centrifugal deep well pump, the combination of a plurality of individual spoolshaped impellers detachably connected in end to end engagement, each of said spool-shaped impellers having a plurality of generally longitudinally extending curved vanes lying in its poncaved contour, a casing surrounding said spool-shaped impellers and comprising individ-Y ual sections connected in endwise relationship and having surfaces curved reversely to the concaved contours of the spool-shaped impellers. the curved portions of said sections spanning the connection Joints of two adjacent spool shaped impellers, the endmost spool shaped impellers in the assembly having shaftV receiving heads detachably connected thereto.

GEORGE F. WISLICENUB.