Патент USA US2113116код для вставки
.April 5, 1938‘. J.-o. MCMILLAN _ I 2,113,116 ' REGENERATIVE TURBINE ' PUMP ' 1 Filed April 9, 1955 s Sheets-Sheet 1 MN“, . a@524; \\Wm_ .m \1.QN&N\ . %\ 1km‘. " W V 0.\ .w. m.Q“ J.N§R WW. 1| 3 MW R McMz‘ZZaz; . I ’ ; , . , A1335, 1938- - > r J. O.iMcMll‘_LAN ' 2,113,116 REGENERATIVE TURBINE PUMP I Filed April 9, 1935 ‘ 3‘Sheets-Sheeti 3 \1 .. r I . .M \ . \. 0‘. . [Ml"ml l l u . , 2351m?» I, . I J’ 0. McMillan I, ‘Patented Apr. 5, 1938 “ ~ 2,113,116’ ' ; iUNlTED. STATES-Q" PATENT-r OFFICE‘ _ 2,113,116" . REGENERATIVE TURBINE PUMP ' ' ' ‘ - James 0. McMillan, ‘Wichita, Kans; Application April 9, ‘1935, Serial No. 15,486 1 Claim. ‘(01. 103-96) makes it possible to cast or‘ die cast the impeller This invention relates to pumps and more particularly to regenerative pumps and is a con struction capable of pumping a, mixture of water of bronze or other similar material. » Additionally, I aim to provide an impeller pref- ' erably having two raceways .with means for ad-- ' and air at the same time to as high a ‘pressure 5 head with one impeller as‘. will the commonly justmentwhile the pump is in operation to_ com- 5 known multiple stage centrifugal pump. It is of thetype having a casing provided with an in let opening and outlet opening for receiving and discharging either liquid or liquid and air by pensate for wear, to provide means for adiust- , ment to- take up wear in the raceways independ in the action of a rotor of the single cone or dou ently of the impeller, to provide such a pump with interchangeable and renewable raceway lin ers in which the ?uid raceways are sealed one 10 ble cone type with a multiplicity of enclosed from the other, and to provide a pump of this type in which one of the passageways‘ may be used vanes leaning in the direction of rotation, im pinging against the free liquid in‘ the channels ' for low pressure and the other for high pressure of the pump and carrying the ?uid therein with to make a two stage pump for high pressure duty. Various additional objects and advantages will ill become apparent from a consideration of the de scription following taken in connection with ac companying drawings illustrating an operative combined action thereof resulting in a helical or , 15 it. . Operation of the pump is aided by kinetic en ergy, centrifugal force and tangential force, the spiral course or travel of, the ?uid to cause a ,, parted to the particles of fluid as it travels through the channels. ‘ ' embodiment. ’ ‘ In said drawings: regenerative action or repeated impulses im ' , - ' 20 Figure 1 is a_ substantially central, longitudi nally sectionalview through one form of pump One object of this invention is to improve this ' according to my invention; .type of pump as to structure, efficiency and vol 25 ume based on the discovery that if the raceways are properly curved and placed at right angles to the axis and at an angle to the rotor, the helical path taken by the ?uid and the pressure head will be increased. ,, 30 A second object of my invention is to provide :1 double cone or triangular rotor having two channels sealed one from the other to increase the volume, to balance the rotor load, a d to prevent the impeller from becoming air bound :3 by providing sucha rotor that one side may pump liquid and the other side may pump air. A third object is to provide in a, pump of the general character stated, a chamber in which the ‘ liquid and air arelseparated and in which the 4-9 liquid, or a portion of it, is revolved in the di rection opposite to rotation of the rotor and the travelling ?uid in the channels, and to return ‘a _ Figure 2 is a vertical, substantially central cross sectional view through said pump; ~ ’25 Figure 3 is a fragmentary side elevation of the impeller; - Figure 4 is a cross sectional view taken on the . line 4—4 of Figure 3; _ Figure 5 is a. detail view of the combination 30 check valve and strainer employed, being partly in side elevation and partly in section; ' Figure 6 is a view similar to Figure 3 but the‘ vanes thereof being disposed at the opposite an gle; 3 Figure 7 is a section taken on the line 'l-‘| of Figure 6; = ‘ - v . Figure 8 is a central, longitudinalsectional view through a modi?ed form of pump; ‘ Figure 9 is a section taken on the line 8~—9 40 of Figure 8, and ' ‘ ‘ Figure 10 is a sectional view taken on the line Ill-10 of Figure 9. Referring specifically to the‘ drawings where maintain a seal. ' in like reference characters designate like or 45 Another object of the invention is to_provide ~ corresponding parts throughout the di?erent an impeller in which the channels and vanes are views, and ?rst to the form of Figs. 1‘ to 7, l designates the pump casing having a removable positioned at zones remote to the axis and have portion of the water into the rotor chamber to H) means for adjustment and increasing the ca- . cover 2 bolted at 2’ to one side thereof, which , casing encloses an impeller 3 between liners l and 50 A further object is to provide an impeller in ' 5. Said liners 4 and 5 have annular, inwardly m pacity. which the vanes lean in the direction of rotation and are otherwise angular to cause the fluid to extending portions 6 and 'I enclosing the impeller and provided with raceways 6' and ‘I’ communi-_ travel in a more pronounced spiral path .to in eating with a common inlet 8, and a common radial outlet 9. Said raceways are blocked or 55 55 crease the ' pressure head. This construction 2 2,113,116 sealed off betweenthe inlet and outlet by a solid . studs 3| by means of a screw driver’ engaged'with portion iii of said portions 6 and ‘I. _ key-ways or kerfs 3|’ thereof. Adjustment of Said impeller or rotor 3 is mounted on a tapered the.impeller is effected by relative adjustment portion ll of a ‘shaft l2 and'held rigidly in place of the nuts 22 and 23. _ by a nut l3 screwed to the shaft._ In turn, shaft It will be apparent that arrangement of the I2 is mounted on double row ball bearing devices impeller channels on an angle to a perpendicular l4 and l5_ and sealed by rotary shaft seals l6 ‘ line, usually but not necessarily a 45° angle, and and I1 against seats [8 and I3 through the agency raceways to match this angle causes the ?uid to be of expansive springs 20 and 2| surrounding the acted upon. by centrifugal and tangential forces, .10 shaft. Adjusting nuts 22 and 23 maintain the the centrifugal force causing the ?uid to follow impeller 3 in proper spacedrelation'with respect the curved channels“ and raceways to return the 10 to the liners 4 and 5 to prevent a'ctu'al‘metal to ' ?uid to the blades at the point nearest the axis metal contact and its undue wear. A spring to receive additional impulses, the inclination of washer 24 between bearing device l4 and nut any matter moving in a circlebeing to ?y radially 15 22 permits of shaft expansions and contractions. from the center of rotation to the extreme point The mounting parts for said shaft are disposed of the periphery. The ?uid-is encased and trapped 15 within tubular extensions la and 2* of the casing - in:the channels of the rotor 3 and the raceways and cover and lubricant is. supplied to the shaft 6' and l’ and the resultant forces cause the ?uid and other working parts, preferably to maintain to be deflected at right angles and downwardly to a bath, by introduction through openings nor be returned to the impeller blades 21 where the 20 mally covered by screw plugs Ib and 2b. blades give it added impetus and a succession of Speci?cally, the impeller rotor 3 is of the double such impetuses assists in the two forces mentioned ' cone, triangular or wedge shape at the periphery as ‘shown and intimately contacts with walls of the portions 6 and ‘l inwardly of the raceways. The impeller vanes are on opposite sides of rotor 3, extending generally parallel to shaft I2 and designated 21. Said vanes‘2l slant in the direc tion of rotation to the extent of 45° and the faces 30 thereof are also 45° to a line perpendicular to the shaft I2. The ‘base walls of the raceways 6 and ‘I are preferably semi-circular and the spaces between adjacent blades or vanes 21 have in creating a growing pressure head as the liquid again and again receives kinetic energy from the impeller 3. ‘This ef?cient action of the impeller 25 is due to a large extent to the tapered impeller with its tapered channels, blades inclined in the direction- of rotation, raceways on an angle to match the channels of the tapered impeller to cause the ?uid to be acted upon by centrifugal 30 ‘force at the point most remote from the axis of rotation and because the centrifugal force is greatest at this point,v the ?uid is de?ected at right angles and downwardly towards the axis at a point where centrifugal force is not so great 35 their base walls substantially semi-circular but preferably ?attened slightly at 21'. These vanes, raceways and spaces are designed substantially , returning the ?uid to the blades to receive a series as described so as to cause the ?uid to describe ’ of impulses as outlined. a path of travel approaching a helical or spiral path in the impeller'channels or spaces and the 40 raceways, the object being to cause the ?uid ahead to dip or return back into the impeller vanes The helical or spiral path taken by the-?uid results in the fluid re turning to the impeller blades at a point farther ahead in, the direction of rotation, when it would 40 again receive, kinetic energy by the action of and receive a plurality of impulses to increase ‘the impelling vanes. ' , The e?lciency of the pump is materially in The impeller has grooves 25 engaged by seal creased by the balanced wedge type of the im the pressure head. 45 ing rings or packing 26 of the liners ‘4 and 5 to prevent radial‘ leakage or inward seepage of fluid. Said blades 21 preferably have their backs more pronouncedly tapered than theirv fronts to pre vent the formation of eddies and the curved base 50 walls of the spaces or channels between the vanes 21 also prevent the formation of eddies. ' In pumping a mixture of air and water, it-is preferable to connect an air inlet to only one side or one raceway near the-inlet so that the 55 impeller may at all times be water sealed vand prevented also from becoming air bound. As a further precaution, an air separating chamber 29 is provided in the outlet 3. This chamber 29 has its wall round with its axis parallel ‘to the 60 axis of shaft l2 and hence it causes the water peller. Various changes may be resorted to within the spirit and scope of the invention, for instance to dispose the blades or vanes 21 and the channels‘ at angles greater or less than that set forth. I may also dispose .the blades or vanes of the 50 impeller as designated 21' in Figs. 6 and '7 at the opposite angles to those described so that the pump will operate in the reverse direction to that described, the other pump parts correspond ing to such reversal. . 7.55 - As shown in Figs. 2 and 5, I may employ a novel combined check valve and strainer combination at the intake or suction‘ end of the pump to keep the water from falling back into the well or source of supply and to protect the impeller and parts 60' from coarse sand and other particles. This device has a casing 32 having an inlet at 33 in to form a whirlpool in which a portion of the water will be ‘returned to the vanes 21 to perfect ‘and maintain a water seal while pump ' line with a removable, tubular screen 34, held in ' ing a mixture of water-and air. The water in - place by a screw plug 35 in one end of casing 32. 65 said chamber 29 revolves in the opposite direc A pipe 36 connects casing 32 to inlet 3 of the tion t9 the impeller and thus releases the air at pump, such pipe communicating with a chamber the outlet and a portion of the water is returned 31 within the casing which communicates with to the impeller 3 to ,displace the air which may inlet 33 and the screen chamber through a valve Q have remained between the blades 21. 70 ' To compensate for corrosion, erosion and wear, seat 38. Said vvalve'seat is normally covered by' a check valve 39, removably secured to a stem the raceways 4 and 5 are interchangeable and . by nuts 40 and washers 4|, the upper end of the‘ ‘renewable. They are also adjustable for wear independently of the impeller and while the pump is in operation. This adjustment is accomplished stem being slidably telescoped in 9. depending tube 42 of a removable screw closure or plug 43 for an opening ‘of casing'32 through which the, 75 byremoving screw plugs 30 and adjusting screw . valve and valve seat are applicable and remote-f 3 2,118,116 able. ’ Strainer or screen 34 is removable for cleaning. ~ blades increase the efficiency and pressure of th pump. , Instead of the vanes 21, raceways and channels being provided on two sides of an impeller, they may be provided on one side only, as in the form $1 of Figs. 8, 9, and 10. Speci?cally, there are .two raceways and two sets of blades, the outlet of one raceway being connected to the inlet of the .next one to form a two-stage pump. In this 10 form, a casing 44 is used having an inlet 45 and outlet 46. The combined check valve and strainer of Figs. 2 and 5 may be connected to inlet 45 if-desired. On one side of casing 44 is a side plate 46 removably bolted in place at 41. 15 Within the casing, an ‘impeller 48 is disposed being mounted on a shaft 49 in the same man ner in which impeller 3 is mounted on shaft l2, and said shaft 49 in casing 44 and side plate 46 being mounted in the identical manner in 20 which the aforesaid‘ shaft 12 is mounted. Cas-_ ing 44 has an interior ?uid raceway 50 which is semicircular in cross section and extends more than 360° around the casing, thus being spiral or substantially so. (Jo-acting with such race 25 way 50 are vanes 5| and channels or spaces 52, identical in structure and arrangement to the vanes 21 and channels or spaces between them, being however, arranged in a path more than 360° so as to correspond with the raceway 50. 30 Raceway 5!! discharges at 5! into the outlet 46. By reason of the construction last described, the impeller 48 is impelled by the ?uid almost ' - I claim as my invention: I . A pump of the class described having a casing open at one side provided with an annular wall, a side wall and an outlet chamber extending from the side wall to the open side and ,out wardly from the annular wall, said chamber having its inner wall curved about an axis sub-' stantially parallel to the longitudinal axis of 10 the casing, a shaft journalled longitudinally in said casing, a peripherally wedge-‘shaped im peller on said shaft, liners disposed one on each side of said impeller, each inclined face of said _ impeller having channels, blades in said chan l5. nels inclined in the direction of rotation and , disposed at an angle to the axis of the impeller, said liners having portions jointly surrounding the periphery of the impeller and provided with raceways ‘opposite the respective channels and 20 communicating through said portions with said . outlet chamber, and a closure at said open side of the casing abutting one of ‘said liners and se cured to the casing, said side wall' and closure having tubular outward extensions disposed 25 about said shaft provided with interior shoul ders, seat members for said shaft located in said. extensions and abutting said shoulders, seal de vices about the shaft engaging said impeller and said seat member's, expansive springs about the shaft engaging said impeller and said seal de two revolutions before being discharged so as vices, said impeller having a tapered fit on said shaft with the taper ?aring in a direction away to increase the pressure head. from said closure, and screw elements on said - 7 If desired, the blades or vanes 21, 21', and SI, 35 instead of being integral with the parts carry ing them, may be initially separate and welded in place. These separate blades or vanes may be made of ‘very thin sheet metal. Such thin . closure operable from the exterior of the pump and against one of the liners to move the same and adjacent parts to take up wear. JAMES O. MCMILLAN.