AU458564B2

AU458564B2 - Vertical centrifugal pump

Info

Publication number: AU458564B2
Application number: AU39409/72A
Authority: AU
Inventors: Frank Zagar Irvin
Original assignee: AR Wilfley and Sons Inc
Current assignee: AR Wilfley and Sons Inc
Priority date: 1971-02-26
Filing date: 1972-02-25
Publication date: 1975-01-31
Also published as: US3704960A; NL171374C; AU3940972A; ZA721121B; GB1359749A; NL171374B; CA974124A; NL7202463A

Description

39.40 9 n VERTICAL CENTRIFUGAL PUMP

a stationary shaft A vertical centrifugal .pump having associated with said shafts for and a rotating shaft and means the pump impeller and pump casing. adjusting the clearance between the clearance between the Means are also provided for adjusting form a is secured in a position to expeller and a die ring which the shaft. the bearing means for labyrinth passage for.protecting are coaxially arranged in a The stationary and rotating shafts for the shaft bearings. manner to provide an effective seal

458.564

3940 9 2 BACKGROUNG OF THE INVENTIOH.

vertical centrifugal pumps. This invention relates to pumps to provide art vertical centrifugal It is a problem in prior for wear between the impeller an effective means for compensating to maintain the clearance within and casing of the pump in order operation of order to obtain efficient predetermined limits in the It is often necessary to either repair or replace the pump. this clear- art pump in order to maintain worn parts in the prior Further, it is difficult to achieve ance within tolerable limits. casing for preventing an effective seal between the impeller and of the pump without contaminants from reaching the shaft bearings in order to protect the bear- resorting. to epensive onstruction

ir The present invention overcomes these problems by pro-

limits in order to obtain the ance within certain predetermined the shaft of the most effective operation from the pump. Further, that is arranged in such a manner pmp in the present invention seal is provided for preventin effective and simple bearin l y greater from reaching the bearings, and according contaminants to one realized. Moreover, according pump and bearing life is th d e t h of submersion embodiment of-the invention, the leng ail p sections from by addin to or removing of the pump may be adjusted to increase the shaft, die ring cylinder and other parts the pump the.pump. flexibility of installation of a threaded adjustment means In the present invention, and with the pump shaft for adjusting the shaft is associated respect to the pump casing in impeller axially vertically with to to adjust the clearance etween the impeller and casin order the operation of the pump. Further maintain the most efficient

39.40 9 na

pump shaft includes a stationary shaft and a coaxially arranged rotating shaft which is connected to the impeller. Bearing means are provided between the stationary and rotating shafts and the stationary and rotating shafts are sealed with respect to one another to prevent the fluid being pumped from reaching the bear- ings. Further, a sleeve means is disposed in coaxial relationship with the pump shaft and includes a labyrinth seal means thereon for effecting a labyrinth seal between the expeller and pump shaft. Adjustment means also is provided for independently ad- Jasting the clearance at the labyrinth seal in order to compen- sate for wear and to adjust the expeller clearance in order to *obtain the most effective seal. In one embodiment of the inven-

tion, sections may be added to or removed from the stationary and rotating shafts and the sleeve means to adjust the length or depth of submergence of the pump, and support bearing means are pro- vided between the radial and thrust bearings to add stability and rigidity to the extended pump. These support bearing means, by

.c7critical 42,.damping ,Tew vibrations, coupled,/yo z,9 the with /6 case 73 double volute constructionJland which reduces unbalanced radial forces on the impeller, enables a much more increased length of pumping unit. It is ayteotu. of this invention to provide a vertical

centrifugal pump having a simple and effective means for readily. adjusting the clearance between the pump impeller and pump casing. It is another feature of this invention to provide a vertical centrifugal pump having a simple and effective means for sealing the shaft bearings from the fluid being pumped. Yet another teejof this invention is to provide a

means for adjusting both the clearance between a pump impeller between and pump casing and for adjusting a part of the seal means the casing and shaft of the pump.

4 "458.56

39,409 M

means for adjusting A further object)is to provide a of the pump. ie length or depth of submergence

THE DRAWINGS. BRIEF DESCRIPTION OF view in elevation of one Fig. 1 is-a vertical sectional

mbodiment of the pump. in elevation of a Fig. 2 is a vertical sectional view

econd embodiment of the pump. view of a portion of a Fig. 3 is a vertical sectional

,hird Pmbodiment of the DumD. DETAILED DESCRIPTION OF THE INVENTION.. like rererence Referring now to the drawings, wherein the several views, a pre- iumerals refer to like parts throughout is illustrated in Fig. 1 and lerred embodiment of the invention disposed main pump support -omprises a generally horizontally base 11 secured to the pump platform 10 with a main pump slide or screws 12 or the ipper surface thereof as by means of bolts mounted to the main like. A motor pedestal 13 is adjustably pump slide bolts 14 or the like pump slide base by means of main disposed slots 15 in the extended thrnugh generally horizontally A suitable motor means 16 is supported on main pump slide base. pump. A motor shaft 16' ex- the motor pedestal for driving the a motor sheave 17 is secured tends downwardly from the motor and A plurality of V-belts 18 are thereto for rotation therewith. pump sheave 19. A main pump reeved on the motor sheave hahon a longitudinally through the main slide adjustment screw 20 extends main pump support adjustment pump support platform and through a main pump slide base. The screw bracket 20' for adjusting the pump sheave may be adjusted distance between the motor sheave "and and main pump slide by means of the main pump slide bolts "458.5 6

3 940o9 1

on the belts 18. adjustment screw for adjusting the tensioning means of screws The pump sheave 19 is secured to an end cap 21 by turn secured to a or bolts 22 or the like and the end cap is in or bolts or the like rotating pump shaft 23 by means of cap screws three axially 24. The rotating pump shaft 23 is comprised of an upper aligned parts corineated in end-to-end relationship: end to the end rotating bearing ring 25 connected at its upper rotating bearing cap; a lower rotating bearing ring 26; and a the upper housing 27, connected at its opposite ends between bearing ring 26 rotating bearing ring 25 and the lower rotating like. A rotating by means of screws or bolts 28 and 29 or the of-the lower shaft adapter 30 is connected to the lower end or bolts 31 or r otating bearing ring 26 by means of cap screws with the the like, and extends downwardly in axial aliglm~nt 32 upon which is suit- rotating shaft to form an axle or shaft hub ably secured a runner or impeller 33 having suitable ports or vanes 34 therein. The structure including the rotating shaft

thus described forms a means for transmitting power from the motor to the impeller. shaft A hollow generally vertically.disposed stationary shaft and extends is positioned coaxially within the rotating the upper end of upwardly at its upper end substantially beyond is supported in a the rotating shaft and the pump sheave,-and end of the shaft cylindrical shaft support sleeve 36. The lower enlarged depending support sleeve 36 includes a diametrically hub 38 which is skirt 37 within which is disposed a shaft locking wedged or cammed between the skirt 37 and shaft 35. One or a operatively connect- plurality of pull-up bolts 39 or the like are the locking hub ed between the skirt and locking hub for wedging of locking between the shaft and skirt and one or a plurality 6 458,564

39.40 9 nz the skirt and hub jack screws 40 are operatively engaged between sup- locking hub for releasing the shaft locking hub. The shaft plurality of port .sleeve 36 is connected to and supported by a the shaft shaft sleeve support arms 41 secured at one end to platform. sleeve and at their other end to the main pump support pump The shaft support arms 41, shaft support sleeve 36 and main if desired or support platform 10 may be all formed integrally like. may be joined together as by welding or the A radial bearing means 42 is interposed between the 25, and stationary shaft 35 and the upper rotating bearing ring lower most a thrust bearing means 43 is interposed between the bearing end of the stationary shaft. 35 and the lower rotating support the rotat- ring 26. The bearing means serve to rotatably ing shaft 23 on the stationary shaft 35. A pair-of lubricating

fittings 44 and 45 extend longitudinally within the stationary the bear- shaft to points adjacent the bearings for lubricating disposed around the ings, and a flexible grease retainer 46 is stationary shaft 35 between the stationary shaft and upper adjacent rotating bearing ring for maintaining the lubrication the upper bearings 42. A die ring adjustment sleeve or cylinder 47 is disposed in surrounding coaxial relationship with the rotating bearing an opening 48 in housing 27 and extends at its upper end through end extends the main pump support platform 10, and at its lower ring downwardly below the rotating shaft adapter 30. A die die ring adjustment adapter 49 is secured to the lower end of the sleeve 47 and a stationary die ring 50 is'secured to the die rin upwardly adapter by means of machine screws 51 of the like. An 52 is formed oh and outwardly flared axial extension or .epeller rt. a the impller and includes a skirt portion 53 cooperating 7 45 4.

wall 54 on the die ring to forwardly extending annular rib or the casing and shaft. When the effect a labyrinth seal between 52 expels fluid from the area pump is running, the expeller the die-ring adjustment sleeve between the rotating shaft and in conjunction with the behind the die ring, and the expeller passing beyond the die ring labyrinth s eal pre vents fluid from adjustment sleeve or cylinder to the space between the die ring the shaft to rotate in a and the rotating shaft, thus enabling and 2, which illustrate the level dry environment. See Figs. 1 the pump running and stationary, of the fluid being pumped with respectively. downwardly through The shaft *or impeller hub 32 extends plate 56 having a downwardly a central opening 55 in a follower projecting volute case or wall 57 thereon in surrounding relation A pump case 58 closes the lower to the impeller or -runner 33. an upstanding peripheral wall end of the volute wall and includes its th6 volute wall and engaged at portion 59 spaced outwardly of recess 60 in the follower upper peripheral edge in a marginal for 61 is disposed in the recess plate 56. A case gasket seal plate. sealing the case to the follower 57 and pump case 58 The follower plate 56, volute case by .means of a follower Iate are held in assembled relationship held together in clamped assembled guide 62 and a case support 63 614 or the like.* An intake relationship by means of stud bolts 56, voluite case reservoir 65 is assembled to the follower plate and is disposed in surrounding 57 and follower plate guide 62 of the die ring adjustment sleeve relationship to the lower end is provided by a plural- 47. The inlet Into the intake reservoir resistant liners 67 which ity of openings 66 formed in abritioa blade (not shown). are replaceable and have an anti-vortexing 8v 458.,564

39.4o 9 n capacity The number of intakes open can be varied to determine the of the pump. One or more openings 68 are also provided in the

upper end of the intake reservoir 65 to which a flexible hose or or the like (not shown) may be attached to introduce clear water

the like to the pump to prime or flush the pump. The outlet from up- the pump case is through a discharge keeper elbow 69 and then the wardly through a vertical stand pipe 70 to a location above

main pump platform The follower plate 56, volute case 57, pump case 58 and intake reservoir 65 are supported by a guide means 71 comprised of an upper annular ring -71' secured to the main pump platform in any desired manner such as by bolts 72; a lower annular ring and 72suitably secured to the top end of the intake reservoir having an inlet opening 68' therein aligned with'the inlet open- lower ing 68; an annular guide ring 73 ntermediate, the upper and to the die guide rings, and.extending .in surroundieg relationship of ring adjustment sleeve. or cylinder 47 with a guide ring 74 Teflon or the like interposed between the.ring 73 and the die ring adjustment sleeve 47 for reducing the resistance to relative axial movement between the die ring adjustment sleeve and the spaced guide means; and three longitudinally extending, equally support members, only one of which, is shown, formed rings integrally with the rings 71'1i 72" and 73 and holding the in predetermined fixed spaced relationship. In order to obtainrhe most efficient operation of the between the pump, a predetermined clearance is maintained at D runner or impeller.33 and the follower plate.56. Further, the. muit be clearance at E between the expeller 52 and die ring 50. .an maintained within predetermined limits in order to obtal effective seal. In order to maintain these clearances within 9. 45 j.

.39,40 912 predetermined limits, adjustment means is provided for adjusting the spacing between the impeller 33 and follower plate 56 and between the expeller 52 and die ring 50. The adjustment is accomplished by means of a stationary shaft adjustment nut which is threaded on an externally threaded end portion 76 of the stationary shaft 35 which extends upwardly beyond the station- ary shaft support sleeve 36. By turning the nut 75 in a counter clockwise direction, the stationary shaft 35 is caused to move downwardly, increasing the clearance between the impeller 33 and the follower plate 56 and by turning the nut 75 in a clockwise direction, the shaft 35 is moved upwardly, decreasing the clear- ance at D. The upper end of the die ring adjustment sleeve 46 includes a radially outwardly extending flange 77 and a plurality of elongated support rods or members 78 are threaded or otherwise secured to the flange and extend upwardly to a support plate 79 which is held In fixed relati onship to the stationary shaft between a stationary shaft shoulde r 80 and a lock nut 81'.threaded on the end of the stationary shaft. Accordingly, when the sta- tionary shaft 35 is adjusted upwardly or downwardly by means-of the nut 75, the support plate 79 Is carried along with the stationary shaft, and through the support rods or members 78.4 the die ring adjustment sleeve 47 And die ring 50 are adjusted up- wardly or downwardly along with the stationary shaft to maintain the clearance between the expeller 52 and the die ring 50 con- stant as the clearance between the impeller 33 and follower plate 56 is adjusted. Alternatively, the nut 75 could be welded or otherwise secured to the shaft support sleeve 36 and the stationary shaft turned relative thereto as by means of the nut 81, which -k 16 458*5 64

3 9 '.40 9fl2 ~996- rotation of would be suitably secured to the shaft/,Vf to effect the shaft by turning the nut. die Independent adjustment of the clearance between the the posi- ring 50 and the expeller 52 is accomplished by adjusting to the support tion of the support rods or members 78 relative plate 79. Referring nlow to Fig. 2 of the drawings, the second correspond- embodiment of the invention is illustrated and parts are indicated by ing to the same parts in the Fig. 1 embodiment of the in- the same reference numerals primed. This embodiment in Fig. 1 primari- vention differs from the embodiment illustrated the clearance ly in that the adjustment means for Adjusting the expeller between the impeller and follower plate and between of adjustments and die ring is accomplished through a plurality pump case, al- and the intake reservoir is eliminated from the embodiment if though the reservoir could be provided in this desired. pump This embodiment of the-invention includes a main curved sup- support platform 10' having a plurality of upwardly a stationary shaft port arms 41' connected at their upper ends to downwardly support sleeve 36', having a diametrically enlarged shaft 35' extends extending skirt 37' thereon. A stationary pump and is held in coaxially through the shaft support sleeve 36' fixed relationship to the shaft support sleeve 36' by means of a 37' and secured locking hub 381 wedged between the shaft and skirt is. in position by means of the bolts 391. 'Apump sheave 19' rotatably disposed around the stationaryshaft 35' and Is secured 22'1o The end to an end cap 21' by means or bolts or the like 82 by"means of cap 21' is secured to a rotating -bearing housing includes an bolts or the like 24'. The rotating bearing housing __11

39.4 0 9 nl2: to an upper end portion disposed in surrounding relationship portion disposed upper, radial bearing means 42' and a lower end bearing means 43'. in surrounding relationship to a lower thrust rotating shaft for The rotating bearing housing 82 comprises the to the lower the pump and. a rotating shaft adapter 30' is secured 31' or the like. end of the rotating shaft 82 by means of bolts from the rotating An impeller hub or axle 321 extends downwardly shaft adapter 30' and has an impeller or runner 331 secured form- thereto. A plurality of ports or vanes 34, or the like are is an upwardly ed in the impeller. Also formed on the impeller annular skirt extending outwardly flared expeller 52' having an annular down- 53' disposed in cooperating relationship with an ring wardly projecting rib or wall 54' on a stationary die pump case and to to define a labyrinth seal between the shaft and sleeve expel fluid from the space between the die ring adjustment operating. The shaft or and rotating shaft when the pump is in a follower impeller hub 32' extends through an opening 55' volute wall or plate 56' which has a downwardly extending annular is closed by a case 57'. The lower end of the volute wall 57' wall 59' there- pump case 58t which includes an annular upstanding 60' formed in on .extending at its upper marginal edge in a recess the follower plate 56'. The follower plate, vo~te case and pump follower case are held in assembled relationshiPjby-meae-of held in clamped plate guide 62' and a case support 63' which are pump case by relationship on the follower plate volute case and at their lower means of a plurality of support rods 83 extending support 63' ends through the follower plate guide 62' and case pump support and extending at their upper ends through the main platform 10'. The upper ends of the support rods 83 are thread- on ed and include a pair of adjusting nuts 84 and 85 thereon 12 r 45'8. 56

39,40 9 112. 10' for adjust- opposite sides of the main pump support platform case relative to the ably supporting the support rods 83 and pump 33'. Washers main pump support platform 10' and to the impeller 86 and 87 are disposed between the adjusting nut 84 and adjust- support platform ing nut 85, respectively, and the main pump in surround- A die ring support sleeve 47' is disposed and is held in fixed Ing relationship to the rotating shaft 83 10' by means of relationship to the main pump support platform an annular flange 88' welded to the sleeve 47' adjacent its upper by means of end and bolted to the main pump support platform flange and through the bolts or the like 89 extended throUgh the main pump support platform. A die ring adapter 49' is suitably sleeve 47' and secured to the lower end of the die ring support adap ter by means of the die ring 50' is secured to the die ring 51'. By adjusting a plurality of bolts or screws or the like support rods 83, the the position of the nuts.84 and 85 on the pump support platform position of the rods relative to the main the follower is adjusted and accordingly the position of adjusted thereby vary- plate 56' relative to the impeller 33' is and the follower plate. ing the clearance D between the impeller 14 threaded onl The/stationary shaft adjustment nut 90 is and cooperates with the the upper end of the stationary shaft 35' when the nut is turn- stationary shaft support sleeve 36' so that shaft 35' is ed in the appropriate direction, the stationary thereby vary the clear- caused to move upwardly or downwardly to ance both at D and E. clearance at Accordingly, by turning nut 90, both the the nuts 814 and D and at E may be adjusted and by turning the clearance at D may be adjusted. Since the bearings 42' and 43' are confined between 13 458,564 the stationary shaft 30' and rotating shaft 82, they are effec- tively sealed from the fluid being pumped. The labyrinth seal effected between expeller 52' and die ring 50' also provides a protective seal for the bearings. As can be seen, the first embodiment provides an adjust- ment whereby the clearance D between the impeller and follower plate may be adjusted by turning the single adjustment nut 75 or 81 and without affecting the clearance between the expeller 52 and die ring 50 since the die ring adjustment sleeve 47 is moved along with the stationary shaft by means of the support rods 78 and support plate 79 which is engaged with stationary shaft shoulder 80 on the stationary shaft 35. Fine adjustment of the clearance E between the eypeller and die ring may be accomplished by adjusting the position of the support rods 78-relative to the support plate 79. In the second embodiment, on the other hand, manipula- tion of the nut 90 on the stationary shaft 35' causes both the clearance E between the expeller and die ring and the clearance D between the impeller and follower plate to be adjusted, and the clearance between the impeller and follower plate may be inde- pendently adjusted b3 adjusting the position of the nuts 84 and on the support rods 83. A case support guide-ring 91 is suitably secured, as by welding or the like, to the die ring support sleeve 471 and includes apertures 92 adjacent the periphery thereof through which the case support rods 83 extend for guiding the support rods and maintaining the case in proper alignment with the impeller. In both embodiments, the-bearings are effectively seal- ed from the liquid being pumped and accordingly greater bearing

14 V04 58,564

3 9.409 N. that, Moreover, it is to be understood knd pump life is achieved. second embodiment may be provided a lubrication system in the with lubrication System described substantially identical to the and similar inlet and outlet reference to the first embodiment, pump. means may be provided for the is illustrated in Fig. 3. A third embodiment of the pump is identical in every respect This embodiment of the invention illustrated and described with the embodiment of the invention that the rotating and stationary- with reference to Fig. 1, except 147 the die ring adjustment sleeve shafts 23 and 35, respectively, flanged provided with a threaded or and guide means 71 are each intermediate their ends between and bolted joint or connection bearing 143 whereby one or more the radial bearing -42 and thrust of to increase the length or depth sections may be added thereto submergence of the pump. guide means 93 comprises Looking to Fig. 3, a modified are and a lower section 95 which at least an upper section 914 of their adjacent ends as by means removably joined together at through a flange 97 on the upper bolts 96 or the like extended flange 98 on the lower section. section and a mating, abutting sleeve 99 comprised of at least A modified die ring adjustment suit- lower section 101 is similarly an upper section 100 and a upper at the adjacent ends of the ably removably secured together of bolts or the like 102 extended and lower sections by means 103 and 1014 on the upper and through mating abutting flanges lower sections, respectively. is similarly comprised of A modified rotating shaft 105 and a lower section 107 suitably at least an upper section 106 of their adjacent ends as by means removably secured together at like 108 extended through mating, bolts or cap screws or the 1545S.56 4

39,40 9 nl2. opposed abutting flanges 109 and 110 on the upper and

lower sections, respectively. A modified stationary

shaft 111 likewise comprises at least an upper section

112 suitably removably secured to a lower section 113

by suitable means such as internal threads 114 in the end

of the upper-section in which is matingly threaded an

externally threaded end 115 of the lower section. At least

one support bearing means 116 is disposed between the

stationary and rotating shafts adjacent the point of inter-

connection of the upper and lower sections of the shafts

for strengthening and rigidifying the pump and for damping

vibrations. By providing the releasable or removable

coupling or interconnection between the ends of the guide

means 93, die ring adjustment sleeve 99, rotating shaft 105,

and stationary shaft 111, one or more sections may be added

to or removed from these elements to increase or shorten the

length or depth of submergence of the pump to thus sub-

stantially increase the flexibility of installation of the

PUMP. As this invention may be embodied in several forms

without departing from the spirit or essential characteristics

thereof, the present embodiment is therefore illustrative and

not restrictive, since the scope of the inventio~n is defined

by the appended claims rather than by the description

proceeding them, and all changes that fall within the metes and

bounds of the claims or that form their functional as well

as conjointly cooperative equivalents, are therefore intended

to be embraced by those claims.

16 It 45&5 r.A 45.5.

Claims

39,40O9 n The claims defining the invention are as follows

1. A vertical centrifugal pump comprising a normally

horizontally disposed pump support means, normally vertically

disposed pump shaft means extending through an opening in said

-pump support means and supported relative thereto, pump case

means supported by said pump support means in spaced relation

thereto, impeller means secured to said shaft means for within rotation therewith, said impeller means being disposed

said case means, expeller means adjacent said impeller means

and connected for rotation with said shaft means, stationary

means disposed adjacent said expeller means, said expeller labyrinth means cooperating with said stationary means to form a

seal therebetween, and adjustment means for adjusting the

clearance between the impeller means and pump case.

2. A vertical centrifugal pump as in claim 1, wherein said shaft shaft means includes a stationary shaft and a rotating

coaxially arranged therewith.'

3. A vertical centrifugal pump as in claim 2, wherein said rotating stationary shaft is disposed coaxially within said -shaft.

A vertical centrifugal pump as in claim 3, wherein said an impeller rotating shaft includes a lower end and an upper end,

hub on the lower end of said rotating shaft, said impeller

means being secured to said impeller hub.

A vertical centrifuga4,pump as in claim 4, wherein bearing

shaft and said m.eans are disposed between said rotating shaft stationary shaft for rotatably supporting said rotating relative to said stationary shaft.

6.A vertical centrifugal pump as in claim 5, wherein the beyond upper end of said stationary shaft extends upwardly 17 4 58. 56 4

39,40 9n2 sleeve and a stationary shaft support said pump support means, end of relationship with the upper is engaged in supporting shaft supporting said stationary said stationary shaft for means. relative to said pump support pump as in claim 1, wherein 7. A vertical centrifugal die ring means supported said stationary means comprises means to said expeller means by in operative position relatiVe in coaxial surrounding relation- of a die ring cylinder disposed ship to said shaft means. means pump as in claim 7, having 8. A vertical centrifugal is longitudinally adjustable wherein said die ring cylinder, to thereby adjust the position relative to said shaft means to said expeller means. of said die ring means relative pump as in claim wherein said 9. A vertical centrifugal relative to said pump support pump case means is supported at one end to the pump support *means by a guide means connected guide to the pump case means, said means and at the other end to with said die ring cylinder means including means engaged operative and impeller means in proper maintain the shaft means means. alignment with the pump case as in claim 5, wherein said A vertical centrifugal pump bearing means disposed between bearing means includes upper bearing stationary shaft and lower said rotating shaft and said shaft lower end of said stationary means disposed between the and said rotating shaft. said pump as in claim 10, wherein 11. A vertical centrifugal an of three portions, including rotating shaft is comprised surrounding relationship to said .upper bearing ring disposed in bearing ring disposed in upper bearing means, a lower and a to said lower bearing means, s.irrounding relationship 18 1r 458,564

39,40 9 n

rotating bearing housing connected at its opposite ends to said

upper bearing ring and said lower bearing ring, respectively.

12. A vertical centrifugal pump as in claim 10, wherein said

rotating shaft is of substantially one-piece construction and

includes an upper end disposed in surrounding relation to said

upper bearing means and a lower end disposed in surrounding

relation to said lower bearing means.

13. A vertical centrifugal pump as in claim i, wherein said

adjustment means includes means operatively connected to said

shaft means for adjusting the position of the shaft means

relative to the pump support means and the impeller relative

to the pump case means for adjusting the clearance between

the impeller means and the pump case means.

14. A vertical centrifugal pump as in claim" 13, wherein said

adjustment means further includes means operatively connected

with said pump case means for adjusting the position of said

pump case means relative to said pump support means and to said

impeller means for adjusting the clearance between said impeller

means and said pump case means.

A vertical centrifugal pump as in claim 6, wherein said

adjustment means includes means operatively associated with

sad stationary shaft means and with said pump support means

for adjusting the stationary shaft means, rotating shaft means and

impeller means in an axial direction relative to said pump case

means for adjusting the alearance between said impeller means

and said pump case means.

16. A vertical centrifugal pump as in claim 15, wherein the

upper end of said stationary shaft means extends upwardly

beyond said stationary shaft support sleeve and has external

thread means thereon, said adjustment means comprising an 19 458.564

39.40 912. said external thread means so adjustment nut means threaded on stationary shaft is long- that when said nut is turned, said said sleeve. itudinally adjusted relative to as in claim 16, wherein 17. A vertical centrifugal pump operatively connected with said adjustment means includes means position of said said means for~ adjusting the longitudinal for simultaneously adjusting stationary shaft and said impeller commensurate with adjustment the position of said die ring means the clearance between the of said impeller means to maintain constant as the clearance expeller means and die ring means said pump case means is between said impeller means and adjusted. as in claim 17, Wherein 18. A vertical centrifugal pump of said stationary shaft means said externally threaded portion portion defining an upwardly includes a diaimetrically reduces for adjusting the position facing shoulder means, said means a support plate means clamped oF said die ring means including a nut means threadably engaged between said shoulder means and so that said support plate on said reduced diameter portion shaft for movement there- means is secured to said stationary with said support plate 'with, and support rod means connected for moving said die ring means means and said die ring means means as said stationary shaft along with said support plate clearance between the expeller raeans is moved to maintain the as the clearance between 'means and die ring means constant case means is adjusted. said impeller means and said pump as in claim 18, wherein a 19. A vertical centrifugal pump disposed in coaxial surroundin die ring adjustment cylinder is shaft means and includes a lowex relationship to said rotating means and an upper end end connected with said die ring means. zroyjnected with said support rod 4 48,

39,40 9 112,

wherein A vertical centrifugal pump as in claim 19, includes a the upper end of said stationary shaft means portion and a diametrically enlarged, externally threaded

nut means is threadably engaged with said diametrically

enlarged portion and is in operative engagement with said supporting the stationary shaft support sleeve means for relative to stationary shaft in predetermined axial position said stationary shaft support sleeve means. 16, wherein 21. A vertical centrifugal pump as in claim adjustment said adjustment means further includes separate case for adjusting means operatively connected with said pump said impeller means- the position of said pump case relative to 21, wherein 22. A vertical centrifugal pump as in claim a'plurality of rod said separate adjustment means comprises to said pump case means operatively connected at one end end to said means and adjustably connected at the other main pump support means. 22,wherein Z3. A vertical centrifugal pump as in claim elongate rods, said rod means comprises a plurality of extending through a 'said other end of each of said rods thread means on sad hole in said main pump-support, external nut means threadably other end of each said rod means, and rod means above engaged with said external threads on said for adjustably position- and below said main puimp support means support means and said ing said rod means relativeio said pump means. pump case means relative to said impeller claim 1, wherein intake 24. A vertical centrifugal pump as in to said pump case and reservoir means is operatively connected fluid to be pumped, said forms an inlet to said pump case for inlet openings therein. intake reservoir having a plurality of Ak21 458U564

.39.4 09 Z.

as in claim 24, wherein A vertical centrifugal pump in said intake reservoir anti-vortexiflg means are provided for Substantially reducing adjacent said inlet openings said reservoir. vortical movement of fluid in pump as in claim 25, wherein 26. A vertical centrifugal said intake reservoir for inlet means iEs provided on fluid to said pump casing. introducing a priming or purging pump as in claim 24, wherein 27. A vertical centrifugal intake reservoir are in re- said inlet openings into said liners. placeable abrasion resistant pump comprising a pump support 28. A vertical centrifugal supported by said pump support means, a pump shaft means support means in supported by said pump means, pump case means means and expeller means spaced relation thereto, impeller for rotation therewith, said secured to said shaft means within said case means, impeller means being disposed said adjacent said expeller means, ctationary means disposed to with said stationary means expeller means cooperating and adjustment means for form a labyrinth seal therebetween, the impeller and pump case. adjusting the clearance between comprising; a pump casing; 29. A vertical centrifugal pump casing; impeller- means and outlet means in said pump inlet casing; disposed within said pump means and expeller means means and connected with the impeller elongate pump shaft means casing; outwardily beyond the pump expeller means and extending rotating remote from the casing for ,neans connected co the shaft and expeller means; adjustment the shaft and the impeller carried the shaft and including means means adjacent the end of by between the said means carried i~he.:eby to adjust clearance expeller; and further adjustment adjustment means and the 22 458,564

39,40 OanM. means adjacent the end of said shaft for adjusting clearance

between the impeller means and pump casing.

A vertical centrifugal pump comprising: a pump casing;

inlet means and outlet means-.in said pump casing; impeller

means and expeller means disposed within said pump casing;

elongate pump shaft means connected with the impeller means

and expeller means and extending outwardly beyond the pump

casing; means connected to the shaft for rotating the shaft

and the impeller and expeller means; means cooperating with

said expeller means to form a labyrinth seal therebetween;

and adjustment means for adjusting clearance between said

expeller means and said cooperating means and between said

Impeller means and said casing.

DATED this 4th day of January,.'1974..

WILFLEY &'SONS, -INC.

39*40 9 z

458 564

39,40O9n

49*

458.564

39.,40 9n.

FIG. 3.

4 564