Патент USA US2134219код для вставки
Oct. 25, 1938. ' E. w. TILTON , 2,134,219 ROTARY PUMP Filed Dec. 18, 1936 w] 0%’ 2 Sheets-Sheet 1 ‘ Om“! E. w. TILTON ‘ 2,134,219 ROTARY PUMP Filed Dec. 1a, 1936 i6? \ 2 Sheets-Sheet 2 140% 9 @o-hqr Patented o¢t._25,*193s v ' ' ~ _ ' 2,134,219 UNITED STATES PATENT‘ ROTARY PUMP Edward W. Tilton, Oshkosh, Wis., assignor of one-half to Harryv R. Kay," Winnetka, Ill. - Application December 18, 1936, Serial No. 116,457 ' 5. 2 Claims. (01. 103-144) My invention relates to rotary pumps and par- portions of these passageways being de?ned by ticularly to rotary pumps of the impeller or vane type, such as are used for pumping oil, water, suitable hollow bosses or projections 9 and H cast integrally with the housing. The outer. ends milk, pulp, and other liquids. of these projections may be conveniently thread Stated generally, the principal object of the ed"for connection to pipes or the like, as at l2. 5.. present inventionisto provide an improved rotary .- To give increased rigidity to the housing, cen--- . pump of the impeller or vane type which shall trally disposed external ribs l3 are cast integral- ~ be more ei?cient in operation, less expensive to ly therewith, the ribs, I3 extending between the - construct and manufacture, and easier to repair, 10 clean, and service than any of the pumps here- feet 3 and the inlet and outlet passageway de ?ning projections 9 and H. “ l0 The bore l5 of the housing I is accurately machined to a cylindrical form, and the two ends of the housing I6 and I1 are machined flat in tofore known to the art. Somewhat more spe-_ ci?cally, it ‘is an object of. the present invention to provide an improved rotor structure for use in pumps of the subject type; to provide an im- planes substantially perpendicular to the axis of 15 proved impeller assemblage for use in pumps of _ the bore l5. Spaced holes I9 are provided in the 15 the subject type; and to provide an improved seal and bearing structure for use in pumps of the subject type. side walls of the housing | for. receiving tie bolts 20 which serve to hold the stationary parts of ' These and other objects of the invention, and 20 ‘the preferred method of accomplishing the same will bem'ade more apparent by reference to'the following description taken in conjunction with the attached drawings, wherein- _ the pump in the assembled position. " ' The housing | is closed at either end thereof by: an end plate 2|, preferably of cast metal. 20 Each of the end plates 2|, as is particularly illus trated in Figures 2 and 3, includes an inwardly ' Figure 1. is a sectional view through a, rotary 25 pump embodying the features'of the present in- projecting, hollow boss 23, the outer surface 25 ofvwhich is accurately machined to a cylindrical form. Each of the bosses 23 is provided with an ‘25 inner bore 26 eccentrically disposed with respect vent'ion; ~ Figure 2 is a sectional view on the line 2—2 of I to the outer surface 25 thereof, and with a cylin Figure 1; _ - . Figure 3 is an exploded perspective; view show30 ing the rotor, the impeller assemblages, and certain other of the structural features of the pump drical opening 21 .for receiving the shaft 29 form ing‘a part of the pump rotor. ' A_ somewhat similar hollow boss 3| projects 30 outwardly from the outer surface of eachof the illustrated in Figures land 2; . , end plates 2|, the bosses 3| having a cylindrical , Figure 4 is a perspective view of one of the ‘ bore 33 for receiving the bearing and the gland ~impeller assemblages; I seal, which will be described indetail later.‘ The 35 Figure 5 is an elevational view, ‘partially in outer edge of each of the end‘ plates 2| is re- '35 section, of one of the impeller assemblages; cessed to form a-?ange 34 for engaging the, end _ ‘ Figure 6 is a sectional view showing the features of one of the‘ roller members which serve to connect'the impeller blades to the rotor proper; 40 I .Figure 7 is an end elevational View of this- roller support, the view being taken on the gen- surfaces l6 and I‘! of the housing I, and suitable holes 35 are providedin the ?ange.“ for receiving . the tie bolts 20 which extend through the holes in the housing. - I _ 40 It will be seen that when the end vplates 2| eral line '|-'| of Figure 6; ' _ > are ‘fastened-in positionupon the housing |, the Figure 8 is a. sectional view on the line 8—8 of _ space enclosed thereby will be substantially cylin Figure 6; and 45 ‘y ' ' a - Figure 9 is a fragmentary, perspective view of one of the combined bearing and seal struc-4 tures ‘forming a part of the pump‘ illustrated I particularly in Figures 1 and >2. " , The-pump illustrated in the drawings includes drical in form.- The pump rotor-is‘ adapted to move within this space and includes a generally 45 cylindrical body -_memb81‘- 3'' press-?tted and _ keyed to the rotor shaft 29 which extendsthrough theialigned openings 21 in the end plates 2|. At either end thereof the‘ rotor body 31 is- under 50; a generally cylindrical housing | preferably of‘ cut by an "annular recess 39 for receiving the 50 cast metal. Suitable. feet 3 for attaching ‘the - bearing portions of the impeller assemblages 4| pump to the supporting structure therefor are which‘ are mounted upon theinwardly projecting , discharge cast integrally passageways with this 5 and housing. 7|, respectively, ' ‘Intake and are 55 provided in the walls of the housing I, the outer , , I ' _ The bosses rotor 23 forming body is provided a_part ofalong the end the plates periphery 2|. thereoi with a plurality of longitudinally extend; 65 _ _,| _ _ . ' 2 2,184,219 ing, regularly spaced, cylindrical slots 43 for re- ' lindrical slots 43 in the rotor, and the engaging surfaces of the slots and the rollers are machined slots 43 are open along the periphery of the to a bearing fit. The impeller blade 49 forming pump rotor 31 and connect with the annular a part of each of the impeller members is adapt recesses 39 at either end thereof. _In the pump ed to be disposed within a longitudinal rectan -illustrated in the drawings, the rotor body 31 is gular slot 55 formed in each of the blade sup provided with four of the slots 43. It will be porting rollers 5!. To secure the best mechani understood that any number of such slots as is cal advantage, it is desirable that this slot 55 indicated by the design of the pump may be used. shall have a depth greater than one-half the 10 The end surfaces 45 of the rotor body 3'! are diameter of the roller, and to minimize the width 10 of the pump, one end of each of the rollers 5| machined flat in planes substantially perpen dicular to the axis of rotation of the rotor, and is provided‘with a transversely extending slot 58 which aligns with the annular recess 39 in the the longitudinal width of the rotor is made slight ly less- than the width of the space enclosed rotor body 31! to receive the right angle portion 15 between the end plates, i. e., su?cient clearance of the impeller extending between the blade and being provided to accomplish a good running ht the hub portion thereof. This arrangement permits the width of the en between the end plates 2i and the ends of the rotor body. For pumps of moderate capacity, a tire rotor, including the cooperating impeller as semblages, to be kept the same as the width of clearance of two-thousandths of an inch will gen 20 erally be found satisfactory for this purpose. If the impeller blades, thereby simplifying the prob 20 desired, shims may be used intermediate the end lem of securing a good seal within the pump, and also materially aiding in reducing the space oc surfaces it and ii of the housing and the ad , jacent surfaces of the end plate flanges 3% for cupied by the pump. I prefer to utilize roller hearings in conjunc permitting adjustment of the width of the en 25 closed space during the operative life of the tion with the pump of my invention, but it is 25 to be understood that other types of bearings . pump. The impeller assemblages Ail forming a part of may be successfully employed. It is, of course, the pump of my invention are illustrated par- ‘ desirable that the bearings shall accurately po ticularly in Figures 3, 4, and 5, and as will be sition the rotor within the housing and shall be 30 seen from inspection of those ?gures, each of of a low friction type. The bearing and seal as 30 these assemblages includes a pair of impeller semblage illustrated particularly in Figures 2 and members ill and ‘it which are normally assems 9 is intended for use with a roller bearing. As bled in cooperative unitary relationship. For will be seen by reference to those ?gures, the bore formed in. each of the end plates 2i is convenience, I have designated one of these im 35 peller members (the member ?ll) as the male partially closed at its inner end by an annular 35 ‘member and the other (the member 68) as the member bl which defines a suitable retaining sur female member. Both types of members are face for a gasket, and a gasket 58 of the conven tional trapezoidal cross section type is placed provided with an impeller blade as generally rec against the outer surface’ of this member during tangular in cross section. Each of the impeller members also includes an the assembling of the pump so as to surround 40 annularly shaped hub or bearing portion. ‘The ‘the rotor shaft 29. . ' An annular gasket retaining ring 5% of suit hub portion of each of the male members fl‘? is provided with a cylindrical bore 52 adapted to able dimensions is next introduced into each of be journaled upon the outer surface 25 of one the bores» 33. This ring is followed by a roller bearing assemblage 60 of the conventional type, 45 45 of the inwardly projecting bosses 23 forming a part of each of the end plates 29. The outer the‘ outer race of which is adapted to abut surface of the bearing portion of each of the against the gasket retaining ring. Preferably, the .male impeller members 41 is provided with an. gasket retaining ring is recessed, as at 6!, to annular recess 53 which is adapted to engage a positively ‘prevent any interference with the movable race of the bearing. The next element 50 suitable ?ange forming a part of the hub por 50 tion of the cooperating female member 48 with in the bearing and seal assemblage is a combined a bearing fit. By virtue of this arrangement, the bearing and lubrication retainer 62. This mem two impeller members may be assembled into the ber, as is shown particularly in Figure 9, is gen erally cylindrical in its outer dimensions and is unitary relatiozfship, shown particularly in Fig provided with an annular recess 63 machined in 55 ures 4 and 5, and each of these units can then be journaled upon ’one of the inwardly projecting the inner surface thereof for providing a lubrica-. bosses 23 forming a part of each of the end plates tion well. Lubricant is admitted into this recess 2 I, as illustrated in Figure 2. It will be seen that through a suitable opening 54 formed in the up this arrangement permits the maximum possible per portion thereof, and the proper positioning of the retainer member 62 is assured during the 60 60 bearing surface for each of the impeller assem blages, which necessarily rotate at the same assembling operation by means of a pin 65 which speed as the pump rotor, and yet at the same is ‘adapted to engage a suitable slot formed in time it permits relative movement about the axis the wall of the adjacent outwardly projecting ceiving the impellers and their supports. These of rotation of the unit as a whole between the boss II. 65 male and female impeller members making up ‘ each of the impeller assemblages. This construc tional arrangement of the impeller units is one of the. important features of the present inven tion.’ '10 ‘ ' After the gasket 58, the gasket retaining ring 65 59,_the bearing 60, and the bearing and lubricant retainer 82, have been placed in position within each of the bores 33, a suitable retaining nut 61 is screwed in position so as to hold the several _The impeller blades 49 are driven by .the rotor, ‘elements in place and to tighten the gland seal. 70' and for mechanically interconnecting the rotor ' It will be seen that the number of structural fea tures utilized in making‘ up each of the bearing with the impeller blades, I utilize slotted, cy lindrical rollers 5|, the features of which are and seal assemblages is reduced to the barest min illustrated in Figures 6, 7, and 8. One of the imum, and that substantially all of the elements rollers Si is positioned within each of the cy - are called upon to perform more than one func 75 3 2,134,219 tion, the outer race portion of the bearingBIJ, within 45° of the horizontal, as indicated at 13. for example, serving to transmit the stress in The width of the slots, 12, as is shown in Figure 2, duced by the retaining nut 61 to the gasket re ' is purposely made substantially less than the . taining ring 59, and the bearing retainer 62 width of the impeller blades 49' in order to ac also serving as a lubricant retainer. The entire complish the most ef?cient and quiet’operation of the pump. Through the arrangement of these‘ assemblage is a simple and highly ef?cientar rangement, and not only serves to give a good seal between the shaft and the interior of the pump, but in addition constitutes a seal which is 10 particularly free from any possibility of contam ination, this feature being of great importance when the pump is used for handling milk or like liquids. Further, this arrangement permits the pump'to be easily disassembled, as for cleaning. 15 During operation of the pump, power is ap plied to the rotor shaft 29 from any suitable source. Due to the‘ eccentricity of the axes of rotation of the impeller assemblages and. the rotor, ‘the impeller blades 49 project from the 20 surface of the rotor at all times except when they are passing across the seal point 69 at the upper portion of the pump housing. The amount of this projection varies from zero or less at this upper or seal point to a maximum at the bottom 25 of the pump casing. The bore l5 of the housing I is concentric with the axis of rotation of the impeller assemblages 4|, and hence a very close ?t may be maintained between the impeller blades 49 and the inner surface of the bore at all 30 times during operation of the pump. This makes for high heads and high pumping e?iciency. At the same time, the retractable feature of the blades assures a‘ complete cutting 01f of the inlet and outlet sides of the pump at the seal point 69. 35 It is apparent that there is substantial rela tive movement between the impeller blades 49 and the supporting rollers 51 therefor during op eration of the pump. Because of this, it. is de slots 12, the actual pumping or working portion of the pump is con?ned to the space enclosed by two ‘of the impeller blades. Actual tests have shown that this assures much more satisfactory 10 and more reliable operation than has ever been accomplished in any of the prior art devices. It also permits the pump to be used for pumping liquids which contain rather large amounts of solid material, such as grit, metallic oxides or scale, machinings, and the like. The pump is completely reversible, as will be apparent from inspection of the drawings. From the foregoing, it will be seen that I have disclosed the features. of an improved form of 20 impeller pump which operates much more‘ ef ficiently and much more satisfactorily than any of the pumps heretofore developed. This im-‘ proved operation is brought about, to ya consider able extent, by virtue. of the novel arrangement 25 of the impeller assemblages, which assures a large bearing surface for each of the impeller as semblages as a whole while at the same time pre— venting any undue increase in the dimensions of the pump. '. ‘ - 30 . The pump of my invention is an exceedingly compact structure, and there is substantially no waste space whatsoever withinthe pump hous ing. This means that no liquid is retained with in the pump for any material, interval of time, 35 which is of great advantage from a sanitary view point when pumping perishable liquids such as milk, and of great advantage from the viewpoint sirable that the spaces beneath the impeller blades ‘ of preventing clogging when pumping liquids con- ‘ taining solid material.‘ The novel structural ar bility of excessive friction due to unequal pressure rangement-of my pump permits ready disas distribution. In the pump illustrated in' the‘ sembling thereof, thus particularly adapting it ' drawings, this interconnection is accomplished for use in pumping milk or other food products by four passageways 1| (Figure 1). The outer and for the pumping of pulp solutions which have a notorious tendency to clog pumps of all 45 portion of each of the passageways ‘H is pref erably formed by a suitable drilling in one of the types. The improved pump of my invention se roller members 5|, and the inner portion of each cures a much more positive and more accurate of the passageways ‘H constitutes a connecting control over the movement of the impeller blades drilling which extends through the rotor body 3‘! than was heretofore believed possible of attain and the shaft 29. The drillings through the ment, and this control is accomplished with a 60 shaft preferably intersect and connect with each minimum of frictional effort. I/have disclosed a other so as to attain the best possible equalization novel arrangement for the ports. of the pump of pressure during the operation of the pump. of the subject- type, which arrangement con _It will be also apparent that there is a certain tributes materially to the improved operation of. 55 amount of relative angular movement between the . the pump of my invention, and I have also dis 65 impeller blades 49 and the rotor body 31 during the ' closed an improved form of bearing and seal as operation of the pump. It is for this reason that semblage which is particularly adapted for use the roller membersjl engage the slots 43 within in conjunction with the pump‘ of my invention. the rotor body with a bearing ?t, and that the Moreover, the pump of my invention is com , . 60 impeller blades ‘49 engage the slots 55 within the pletely reversible. 40 shall be connected in order to minimize any possi rollers with a bearing ?t. I It will be understood that various modi?ca In connection with the operation of the pump , tions and variations may be made in the form of my invention, I have found that the position ing and form of the inlet andcutletports 5 and ‘I 05 is of considerable importance. Particularly, I of apparatus embodying the principles of the present invention, and it is my intention that the claims shall be accorded» the broadést rea have discovered that if the ports are extended ‘ sonable construction consistent with the state ofv along the bore of the housing I so that the actual working surface of the bore of the pump subtends an angle no greater than the angle be- ‘ the .art. / g - ' I claim the following as my invention: ‘ 1. A rotary pump comprising a shaft, 8. body member supported on said shaft and having at each end thereof an annular recess ‘arranged. 70 tween two adjacent impeller blades, substantial improvement of performance will result. This is accomplished in the pump illustrated in the concentrically to the axis of the shaft, the outer drawings by the provision of a rectangularly portion of said member. being provided with a ' shaped slot 12 formed in the side walls of the plurality of cylindrical slots, said slots being open 75 housing, which slot is extended down to a point along the peripheral surface of said member, a 05 4 2,184,219 cylindrical roller member disposed in each slot, each roller being provided with a longitudinal slot, a casing for said body member, a plate for closing each end of the casing, each plate be ing provided with an inwardly projecting boss positioned coaxially with respect to the axis of the casing, each boss having a circular opening therein positioned eccentric with respect to the axis of the'casing, an impeller assemblage com 10 prising a pair of impeller members respectively supported upon each boss for rotation about said axis, each pair comprising a male impeller mem ber and a female impeller member, each im peller member comprising an impeller blade con 15 nected to an annular hub, the annular hub of each male member having a cylindrical bore adapted to vengage over a respective boss with a journal ?t, the hub of each female member ?t ting over the hub of a respective male member, said shaft being supported within the circular openings formed in said bosses‘, a pair of im peller members being positioned within each an nular recess, each impeller blade being positioned within a respective longitudinal slot formed in 25 a roller member and extending through a regis tering peripheral opening in an associated cyl indrical slot. , 2. A rotary pump comprising a shaft, a body member supported on said shaft and having at 30 each end thereof an annular recess arranged con cessQa cylindrical roller member disposed in each slot slot ing, nal and having at one end thereof a transverse registering with a respective lateral open each roller being provided with a longitudi slot intersecting said transverse slot, the length of ‘each roller being substantially equal to the length of said body member, a casing for said body member, a plate for closing each end of the casing, each plate being provided with an inwardly projecting boss positioned coaxially 10 with respect to the axis of the ‘casing, each boss having a circular opening therein positioned ec centric with respect to the axis of the casing, an impeller assemblage comprising a pair of im peller members respectively supported upon each 15' boss for rotation about said axis, each pair com prising a male impeller member and a female impeller member, each impeller member compris ing an impeller blade connected to an annular hub; the annular hub of each male member hav 20 ing a cylindrical bore adapted to engage over a respective boss with a journal fit, the hub of each female member ?tting over the hub of a respec tive male member, said shaft being supported within the circular openings formed in said 25 bosses, a pair of impeller members being posi tioned within each annular recess, each impeller blade being positioned within a respective longi tudinal slot formed in a roller member and ex tending through a registering peripheral open 30 ing in an associated cylindrical slot, each blade centrically to the axis of the shaft, the outer portion of said member being provided with a _ being connected to its associated hub by a radial plurality of cylindrical slots, said slots being open portion which is positioned within a respective along the peripheral surface of said member-and transverse slot formed in the roller member which having lateral openings communicating at each > engages said blade. 35 end of the slot respectively with an annular re EDWARD W. 'I'ILTON.