US1861839A - Centrifugal pump - Google Patents

Description

June 7, 1932. A. w. Bu'RKs CENTRIFUGAL PUMP Filed June 26, 1930 3 Sheets-Sheet 3 pump which includes a rotor havin Patented June 7, 1.932

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appliance and :une as,

The present invention relates to pumps and more particularly to pumps of the centrifugal t pe. Inm Patent 1,619,286, issued Marc 1 1927, t ere is disclosed a roiiry a Jacent its margin an annular series of uckets which serve to propel fluid throgha substantially circular raceway from an inlet to an outlet, there being a substantially waterti ht fit at opposite sides of the ra-ceway.

he present invention relates to pumps of this type and has as an object to provide a pump of this character with a multiplicity of raceways arranged in a novel manner and cooperating with a rotor of diii'erent construction.v v

A further object ofthe invention is to provide a pump having a plurality of longitudinally arcuate raceways each having an inlet and an outlet independent of the inlet and outlet of the other and arranged preferably in' a common plane with radii of curvature of the same length. The invention also seeks to provide in association with such a raceway arrangement, a rotor of novel construction having an annular series of blades adapted to traverse both raceways from their inlets to their outlets and also having a plurality of peripherally directed passages which serve to direct a high velocity liquid discharge toward these raceways. For this purpose there is provided a primary raceway adapted to receive the centrifugal discharge from the rotor passages and to direct the Huid into bh of the first mentioned raoewavs.

A further object of the invention is to provide a pump of this character having as-4 sociated therewith means for forming a liquid whirl ool adapted to separate air by centrifugal orce as disclosed in my Patent 1,686,549, granted October 9, 1928. The invention aims to provide adjacent eachfinlet .for the longitudinally arcuate raceways and adjacent each outlet a pocket adapted to set up a liquid whirlpool which separates air from the liquid by centrifugal force.

The foregoing and other objects and features of the invention will become clearer as the description proceeds in connection -6-6 of Figure 2.V

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with a preferred embodiment disclosed in the accompanying drawings. In these drawings:

Figure 1 is a vertical sectional'view on the line 1-i-1 of Figure 2.' .i

Figure 2 is a vertical sectional viewon the line 2-2 of Figure 1`.`

Figure 3 is a sectional view `on the line 3 3ofFigul'eZ.` Figure 4 is aface view ofthe raceway sectionofthepump. v" i Y Figure 5 is a face view of the opposite side A of the raceway section. f y.

Figure 6 is a sectional view on the `line Fi I re 7 is asectional view on the line 7-7 of Figure 2, and

Figure 8 is a face broken away. y p n ,y

Referring to the drawings for a more detailed description, 10 indicates aportion 'of a pump casing havingsecured thereto, asby cap screws 11, a secondsection 12,`the two sections being of substantially uniformfdameter and serving to'clamp therebetween a plate-like raceway section 13 "of "somewhat smaller diameter than the`[irst,rrien'tionied's'ections, so that its marginal portion; may itland be clampedV hetween'a sliculderjlfl on the section 12 and `a shoulder; on thecasingfsecf tion 11. The raceway "n '1,3 'has `fori'ned on a lateral face a plurali :'Jfoffraceways 16,

17, each of which isloiigitlldinally arcuate' the feter partly and also arcuate in crosfssectioinas shownfl'n Stantiauy filled by? en p p serves to min'imize'jt A Q the outlet op'eni1'i`g;fv of one raceway. toftheflnletfj auyaush with che ends of blades 2e on the rotor 124, the blades forming therebetween an annularseries of buckets adapted to ropel ways`16, 17 in the liquid through the raceways. Aswill observed, the rotor and raceway section are provided, at radially oppositesides of the racewa and bucks with com lemental ribs ands grooves w lich intert and form a substantially huid-tight seal, although if desired the ribs may be notched to permit passage from the racewa into the grooves of a very sli ht amountv of 'quid suiiicient tommimize friction between opposed surfaces. ."Ihe rotor 24 is actuatedV by means of a-shaft 25 to which the rotor is connected, the shaft extendoutwardly throuh a stuiing box 27 and liilearing 28 forme in arms 10 cast with the ump section 10.

As will understood, oseration of the rotor will serve to pro l iiui through the racedaiiection of the arrows A. The liquid which is discharged through the outlet opening 20 enters a discharge chamber formed in the section 12. This chamber is of irre ar formation and comprisesfan .upper poc et 29 disposed at the outlet opening 19 and a lower pocket 30, the two poc ets being connected by means of a substantially circular channel 31 disposed between a circular inner wall 32a and an outer wall 33 of similar formation. The passage communicates with the lower pocket through an opening 34 formed in the outer wall and with the upper pocket 29 through an opening 35 formed in the outer wall 33. One of the pockets, in the sresent instance the upper pocket 29, has a ischarge line connection 36 for discharge of liquid or air, or both, fromv the pump. This dischar connection is, therefore, in communication with both pockets of the chamber, in the present instance directly with the pocket 29 and through the latter with the pocket 30. Liquid discharged into the two pockets through the outlet openings 19, 21, sets up a liquid whirlpool indicated by the. arrows W in Figure 6. These whirlpools tend to separate air by centrifugal force and the liquid of the whirlpool due to its location adjacent the buckets, to the path of which the whirl l is tangential, engages the buckets and Egglaces therefrom into -the whirlpool air containedin the buckets. Further description of this feature of the invention is thought unnecessary since the general operation of the whirlpool is set forth in my Patent 1,686,549, granted ,October 9, 1928. It will be understood, however, that any liquid which may be carried away fromeither whi r1- l as the buckets leave `the discharge openings will be carried'into the other raceway and after assing through the latter will be discharge through the outlet openingr of the second raceway. Although the cut-off webs 22 serve to keep this liquid at a minimum, a' small amount will necessarily be carried away i,sei.eee

from each whirlpool, but an equivalent amount will be supplied thereto in the manner described.

Moreover, the manner in which the li uid passes throu h each of the raceways 16, 1 in a helical pat repeatedly entering and leaving the buckets need not be here described, since it is fully set forth in m Patent 1,619,286, granted March 1, 1927. e path of travel of the liquid in each of the raccways 16, 17 is identical with that described in said patent, the only difference between the raceways-being that in the form of the pres ent application they'are somewhat shorter. Each raceway is, however, cross sectionally arcuate on radii substantially the same as the radii of curvature of the bucket bottoms in the rotor, whereby the walls of the buckets and rnceways merge and do not interfere with the whirling or helical movement of the liqiid as it passes through the raceways.

he liquid is not supplied directly to the raceways as in the above mentioned stent, but according to the present invention lilas imparted thereto, preferably by the same rotor, a considerable velocity and pressure before entering the raceways. For this purpose the rotor is formed with a plurality of peripherally directed passa 38 formed between the substantially radially disposed webs 39.

These webs serve to connect a rear wall 46 of the rotor and a wall 41 curved in cross section and carrying the buckets on one lateral face.4

The rear surface of the wall41 is curved toward the same face of the rotor, so that liquid centrifugall discharged through the passages 38 w' l be laterally directed adjacent the periphery of the rotor. Intermediate the webs 39 are shorter webs 39 which serve to divide the passages adjacent the periphery into a pluralit of buckets or outlets 44. These outlets direct-the fluid into a raceway 45 formed on the racewav section 13 and radially spaced outwardly v rom the raceways 16, 17 Liquid mayenter the passages 38 at substantially the center of the rotor through opening 46 which surrounds the axis of the rotor and is in connnunication with a supply chamber-47 formed by the inner wall 32 of the annular passage 31. Y

The supply chamber 47 receives fluid from a supply connection 48 and there is disposed between the' latter and the chamber 47 a sub stantiallytubular strainer 49, so that foreign matter in the liquid may not reach the rotor. This liquid after passing through the chainber 47 into the rotor passages 38 is discharged ccntrifugally into the radially spaced raceway 45.

he raceway 45 communicates through outlet openings 50, 51 with pockets 52, 53

formed in the pump section 12 at the inlet openings 18, 20, the pockets communicating, respectively, with the raceways 16, 17. In other words, the pockets 52 and 53 are in lll) Leonesa communication with the raceways 16 and 17 throu h the inlet openings 18, 20 and also with t e raceway 45 from which liquid is dis charged into the pockets through openings 50, 51. Liquid enters the ockets 52, 53 in a substantially tangential irection, as illustrated in Figure 7, and forms an airseparating liquid whirlpool, the path of the l1 ind in the `aihirl ool being generally indicate by the arrows IlV' in Figure 7. These whirlpools in the pockets 52, 53 o erate in a manner similar to the whirlpools in the pockets 29, 30 and serve to separate air fromthe `liquid as well as to displace into the whirlools the contents of the open mouths or uckets 44 at the ends of the centrifugally discharging passages 38 in the rotor.

The rear face of the raceway section at the various outlet and inlet openings is beveled to provide surfaces 55 which permit the paths of the whirlpools in the several pockets to closely approximate the paths of travel of the buckets 23 and 44 on the rotor, thereby insuring an engagement of the whirling liquid with the buckets on the rotor and the displacement of any gaseous content of the buckets into the liquid whirlpools.

The tubular strainer 49 may be readily removed without disturbing the supply con nection 48, since it is supported beneath an entrance chamber 59 which has a lower wall formed with an opening 60 permittingr the liquid to pass to the interior of the strainer. The lower end of the strainer is closed by a cap 61 which is supported at an opening 62 by means of a removable plate 63. The plate 63 has one end restingupon alug 64 and its other end is fastened as by means of a cap screw 65 to the Wall of the section 12. To clean or replace the screen 49, it is simply necessary to disconnect the plate 63 and the screen may then be lowered through the opening 62. The entrance chamber 59 may be inspected, as for the purpose of determining whether the strainer should be cleaned, through a port 66 normally closed by a threaded plug 67 This port. also serves the purpose of priming the pump should, for any reason, the whirl ool pockets 29, 30, 52, 53 become empty. rdinarily, however, these pockets will serve to retain a suicient amount of iuid to cause evacuation of air from the supply line and initiate liquid pumping.

Obviously, numerous modifications may be made in the structure illustrated and described without departing from the invention, the essential features of which are set forth in the following claims.

I claim:

l. In a pump of the class described, a plurality of longitudinally arcuate raceways each having an inlet opening and an outlet opening, a radially spaced raceway having openings leading therefrom to said inlet o nings, a rotor having a series of buckets agpted to traverse said arcuate raceways and having a series of eripherally directed and centrifugall disc arging passages independent of sai buckets emptying into said last-mentioned raceway, means for introducing liquid into said rotor passages, and means for discharging from the pump liquid which gasses' through the outlet openings of said rst-mentioned racewa s.

2. In a Jump of t e class described, a plurality o longitudinally arcuate racewa s with radii of curvature of substantial y equal length each having an inlet openin and an outlet opening, a radiall space raceway having openings leading t erefrom to said inlet openings, a rotor havin a series of buckets adapted to traverse sai arcuate raceways and havin a series of peripherally directed and centriugally discharging pas sages independent of said buckets emptying into said last-mentioned raceway, means for introducing liquid into said rotor assages, and means for dischargin from t e pump liquid which iasses throug the outlet openings of said rst-mentioned raceways.

3. In a pump of the class described, a plurality of longitudinally arcuate raceways each having an inlet openingand an outlet opening, a raceway spaced radially outwardly from said first-mentioned raceways and having openings leading therefrom to said inlet openings, a rotor having a series of buckets adapted to traverse said inner race- Way and having a series of peripherally directed and centrifugall discharging passages independent of sai buckets and emptying into said outer raceway, means for introducing liquid into said rotor passages, and means for discharging from the pump liquid which passes through the outlet openings of said inner raceways.

4. In a pump of the class described, a plurality of longitudinally arcuate racewa s having radii of curvature of substantial equal length in a common plane and each7 having an inlet openin and an outlet opening, a raceway spac radially outwardly from said first-mentioned raceways and having openings leading therefrom to said inlet openings, a rotor having a series of buckets adapted to traverse said inner raceway and having a series of eripherally directed and centrifugally disc arging passages independent of said buckets and emptying into said outer raceway, means for introducing liquid into said rotor passages, and means fordischarging from the pump liquid which passes through the outlet openings ofsaid lnner raceways.

5. In a pump of the class described, a plurality of longitudinally arcuate raceways each having an inlet opening and an outlet opening, a raceway radially spaced from said first-mentioned raceways and having open- A raceway, means for introducingli in leadn therefrom to said inlet openings, a gter havging a series of buckets ada to traverse said arcuate raceways and av 1ng a series of ripherally directed and centrifugally disc urging passages independent of said buckets and em tying Into said stpaced ui into said rotor passages, and means ischarging from the )ump liquid which passes through the outlet openings of said arcuate raceways, said last-mentioned means includin a ocket dis osed at each outlet opening an a apted to orm a liquid air-separating whirlpool and said pockets being in communication with one another.

, 6. In a pump of the class described, a plurallty of longitudinally arcuate raceways ea having an inlet opening and an outlet opening,Y a raceway spaced from said first-mentioned raceways and having openings leading therefrom to said inlet openings a rotor havin a series of buckets adapted to traverse sad arcuate raceways and having a series of peripherally directed and centrifugally discharging passages independent of said buckets and emptying into saidspaced raceway, means for introducing` li uid into said rotor passages, means for dfsc arging from the pump liquid which passes through Athe outlet openings of the radially inner raceways, sald last-mentioned means including a pocket disposed at each outlet opening and ada ted to form a liquid air-separating whirlpoo ,and a discharge connection in communication with both of said pockets, with one directlyvand the other through the first-menn tioned pocket.

7. In a pump of the class described, a plu- A rality of lonftudinally arcuate raceways arranged in su stantially a common plane and each having an inlet openin and an outlet opening, a raceway spaced ra 'ally from said first-mentioned raceways and having discharge openings leading therefrom to said inlet openings, ockets formed at said inlet openings into w ich the last-mentioned openings empty and each ada ted to form a liquid air-separating whirlpo a rotor having a series of buc ets a a ted to traverse said arcuate raceways and aving a series of r'pherally 'directed and centrifugall 'scharging passages independent of sai buckets and emptyin into said spaced raceway, means for intro ucing liquid into said rotor l passages, and means for discharging from the pump liquid whch passes through the outlet openings of said arcuate raceways.

8. In a pump of the class described, a plurality of longitudinally arcuate raceways with uniform radii of curvature and each having an inlet opening and an outlet opening, a raceway spaced from sa'd tiret-mentioned raceways and having discharge openings leadng therefrom to said inlet openings, pockets formed at said inlet openings ch with both of said pockets Leonesa Y last-mentioned means including a poc et d1s posed at each outlet opening and adapted to erm a liquid air-separating whirlpool, and a discharge connection in communication with one directl and the other through the first-mentions pocket.

9. In a ump of the class described, a plurality o longitudinally arcuate racewa s each having an inlet opening and an out et opening and another raceway s ced from said first-mentioned raceways an having an o ning leadin therefrom, means for exc anging liqui between said spaced raceways after it has traversed one of the raceways, means for discharging the exchanged ,liquid after it has traversed a separated raceway, means for .introducing liquid into one of said raceways, and a rotor having a series of buckets adapted to traverse said first-mentioned raceways and having a plurality of peripherall'y directed centri u lng :1 s emptying into the second-mentioned raceway. p

10.- In a pump of the class described, a raceway portion having on a lateral face a plurality ofvlongitudinally arcuate racewa s each having an inlet opening and an out et opening both of which extend `through the portion to the opposite lateral face and another raceway radially separated from said first-mentioned raceways and having an o ing leadirg therefrom, means for excg liqtuoi between said radially spaced raceways a r it has traversed one of the .racewa s, vmeans for discharging the exc liquid after it has traversed a second and radiall se arated raceway, means for introducing iquid into one of said raceways and a rotor havi a series of buckets ada-pted to traverse sai iirst-mentioned raceways, and also havin a plurality of peripherally directed centri ga ly discharging passages emptying into the second-mentioned raceway.

11. In a pump of the class described, a plurality of longitudinally arcuate raceways each having an inlet opening and an outlet opening, another raceway radially separated outwardly from said first-mentioned raceways and located in a section having an openfrom the raceway tothe op osito lateral face of the section, means for exc anging liquid between said radially spaced racegally dischargways after it has traversed one of the raceways means for discharging the exchanged liqui after it has traversed a second raceway, means for introducing liquid into one of said raceways, and a rotor having a series of buckets adapted to traverse said iirst-mentioned raceways and having a plurality of peripherally directed centrifugally discharging passages emptying into the second-mentioned raceway.

12. In a pump of the class described, a raceway portion having on a lateral face a plurality of longitudinally arcuate raceways each having an inlet opening and an outlet opening both of Which extend through the portion to the opposite lateral face and another race- Way radially separated outwardly from said first-mentioned racevvays and having an opening leading therefrom to the opposite lateral face of the portion, means for exchanging liquid between said radially s aced raceways after it has traversed one o the raceways, means for discharging the exchanged liquid after it has traversed the second raceway, means for introducing liquid into one of said raceways, and a rotor having a series of buckets adapted to traverse said lirst-mentioned raceways and also having -a plurality of peripherally directed centrifugally discharging passages emptying into the secondmentioned raceway.

13. In a pump of the class described, a plurality of longitudinally arcuate raceways raving radii of uniform length in a substantially common plane, each raceway having an inlet opening and an outlet opening, a rotor having a series of buckets traversing said raceways, means for dischargin from the pump liquid propelled through said outlet openings, and means for directing liquid simultaneously into said raceways through said inlet openings, said last-mentioned means including a plurality ofperipherally directed and centrifugally discharging passages in said rotor adapted to initially receive liuid, a iaceway into which said buckets empty and connections between said race- Way and the inlets for said first-mentioned raceways.

14. In a pump of the class described, a pluralit of longitudinali arcuate raceways dispose in a substantie y common plane, each raceway having an inlet opening and an outlet opening, a rotor having a series of buckets traversing said raceways, means for discharging from the pump liquid propelled through said outlet openings, and means for directing liquid simultaneously into said raceways through said inlet openings, said last-mentioned means including a plurality of peripherally directed and centrifugally discharging passages in said rotor adapted to initially receive fluid, a raceway into which said buckets empty and connections between said raceway and the inlets for said first-mentioned raceways, said connections including a pocket disposed at each of said inlet openings, and a pair of openings formed in said last-mentioned raceway through which the latter discharges into said pockets.

15. In a puin of the class described, a raceway section Ihaving on one lateral face a plurality of longitudinally arcuate raceways each having an inlet opening and an outlet opening both of which extend through the section to the opposite lateral face, a casing section at each side of said raceway section between which the raceway section is held in position by the clamping action of the two casing sections, a rotor in one of said sections having aseries of buckets traversing said raceways, the other section having an inlet chamber in communication with both raceways through said inlets, and also havin a discharue chamber for receiving fluid ischarged through said outlets.

16. In a pump of the class described, a racevvay portion having on a lateral face a lurality of longitudinally arcuate raceivays liaving radii of equal lenvth in a common plane and each havin an inlet opening and an outlet opening, Which'extend through the ortion to the opposite lateral face, a raially outer raceway separated from said first-mentioned raceways and having a pair of outlet openings extending through the portion to the opposite lateral face a pocket at each of said inlet openings adapted to receive liquid discharged through the outlet openings of said radially outer raceway and to direct the same into said radially inner raceways through their inlet openings, a pocket at each of said outlet openings for said inner raceways, each pocket vbeing adapted to form a liquid air-separating Whirlpool, a discharge connection for liquid discharged from the radial inner race- Ways and in communication With said pockets at their outlet openings, and a rotor havin a series of buckets traversing said radial y inner raceways and a series of peripherally directed ccntrifugally discharging passages emptying into said outer raceway, complemental surfaces on said rotor and raceway section sealing said raceways one from another, and means for introducing fluid into said rotor passages.

In testimony whereof I have hereunto set in hand.

y ARTHUR W. BURKS.

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