US1709580A - Rotary pump - Google Patents

Description

A. V. JENSEN April 16, 1929.

ROTARY PUMP F i led March 24, 1927 3 Sheets-Sheet l 6, 1929. A; v. JENSEN ROTARY PUMP Filed-Marchj April 1 5 Sheet s-Sheet 2 T zzzrefi 0'2? gig/7205 Vrizerv/zae/z April 16, 1929. A, v, JENSEN 1,709,580

ROTARY PUMP Fled March 24, 1927 5 Sheets-Sheet 5 2 25 /0 20 55* 4 Patented Apr. 16,

UNITED STATES g 1,709,580 PATENT OFFICE.

AMOS VERNEB JENSEN, OI CEDAR FALLS, IOWA, AS OIGNOR TO THE VIKING PUMI COMPANY, A CORPORATION OF IOWA.

ROTARY PUMP.

Application filed March 24, 1827, Serial No. 177,912.

This invention relates to rotary pumps and is particularly adaptable to such pumps when used in the paper making industry for pumping or handling pulp in solution such as paper and wood pulp, or in other industries where it is desired to handle by means of a pump, a fluid having a consistency similar to pulp or the like. A

Heretofore in attempting to handle pulp or the like by the use of rotary pumps, it has been discovered that the pulp fibers orthe like tend to accumulate and wad or ball up in pockets or depressions'in the pump,thus caus- ,ing the pump eventually to jam, and resultpump.

ing in delay and loss of time while the pump is being cleared. It has been discovered also thatlthe pulp tends to work into the bearings, thereby causing sticking and heating, and possible scoring or freezing of the bearings.

The present invention is intended to provide a novel construction and arrangementof element s whereby the above and certain other objectionable results are overcome, and wherein a system of novel construction and arrangement is employed for conducting a fluid such as water, used in the present'1n stance in a pulp pump, to and through various partsof the pump to keep the pump free from i the accumulation of pulp fibers, which, if permitted to wad orball up in the pump and collect on the rotating parts, would seriously interferewith the eflicient operation of the pump.

' One of the objects of the inventionis to provide a casing wherein objectionable pockets or depressions in which the pulp may collect and wad up are entirely eliminated, and wherein the inlet and outlet ports are so positioned, and certain portions of the'casing adjacent the said ports are so arranged as toco-operate with the peripheral edges of the rotor teeth or vanes to produce a cutting or shearing action on the pul vide means for insuring'the removal of pulp from adjacent the sealmg portions or abutments formed in the head plate intermediate the inlet and outlet ports.

Another object of the invention is to provide a novel construction and arrangement for keeping the bearings of the idler pinion and rotor shaft free from the accumulation of pulp, thereby bearings.

Another object of the invention is to pro vide a construction and arrangement for effectually washing the sealing faces of the idler teeth free of pulp just before passing into co-operative relationship with the sealing abutments.

Another object of the invention is to provide means for flushing out the interior of the preventing heating of the ,pump, and also the casing at the rear of the rotor, in case the pump is to be shut down for an appreciable length of time, or in the event that the pump may have been operated during a temporary shortage of water supply. 7 Another object of the invention is to provide a novel construction and arrangement whereby the pulp is continually forced back into the interior .of the pump, thus preventing the passage of pulp to the rear of the rotor and its subsequent passage and loss through the drain or flush-out hole at the rear of the casing. j p A further object of the invention is to relieve excessive friction at the hub of the rotor due to possible end thrust on the rotor tending to force it rearwardly in the casing.

A still further object of the invention is toimprove devices of this character in sundry details hereinafter described and particular- 1y pointed out in the appended claims.

One embodiment of the invention is shown for illustrative purposes in the accompanying drawings, in which Fig. 1 is a front elevation of a pump illustrating the embodiment of certain features of the invention.

Fig. 2 is a front elevation, partly in section, of the pump shown in Fig. 1, with the head plate removed to show the interior of the pump and the relative'position of the rotor, idler pinion and crescent partition, and. to illustrate certain other features of the inven tion. the view being taken substantially on the line 2-2 of Fig. 3. i

Fig. 3 is a vertical sectional, elevational view taken as indicated by the line 33 of Fig. 1 and showing additional features of the front. end

removable ead plate 15 secured to the casing Referring to the drawings,

invention. I l

Fig; 4 is' 'a fragmentary elevational view of' the inner face of the head plate taken as in dicated by the line 44 of Fig. 3,

Fig. 5 is an enlarged transverse sectional elevation through the rotor shaft and associated parts including its bearing sleeve, the view being taken as indicated by the line 55 of Fig.3.

Fig. 6 is an enlarged fragmentary sectional elevational view taken on the line 6-6 of Fig. 1 illustrating the construction ofthe spray arrangement for removing the pulp from adj acent the sealing portions or abutments formed in the head plate intermediate theinlet and outlet orts.

Fig. 7 is a si e elevational View of the rotor.

Fig. 8 is a front elevation of the pump shown in Fig. 1 illustrating diagrammatically a system of pipes or tubing for conducting a suitable fluid, such as water, in the present instance, to the various parts of the pump for keepin the pulp passages and bearings of the pump ree from the accumulation of pulp, thereby contributingv materially to ,the efiicient operation of the pump.

the type of rotary pump shown, and containing an illustrative embodiment of the invention, coinprises a cylindrical casing 10 having an annular wall portion 11 and a back or rear wall portion 12, the annular wall portion being 1 provided with inlet and outlet ports 1;} and 14, respectively.

The casing 10 is dprovidedwith an open ortion a apted to be closed by a bymeans of the studs 16 and nuts 17. R0-

tatably mounted concentrically within the annular wall portion 11 is an internally toothed rotor 18 provided with teeth or vanes 19 adapted to mesh with external teeth 20 on idler pinion 21 rotatably mounted on an idler pin 22 rigidly supported'in the head plate 15, and positioned eccntrically with respect to the rotor 18. The rotor 18 is secured-toan'd'adapted to be driven by a shaft suitable source of power supply and rotata 1y mounted-in a bearing sleeve 24, thesaid sleeve being rigidly secured to the rear wall 12 of the casing 10 in a manner to form in effect, a. part of said casing. In the construction shown, the head plate 15 is providedwith an integrally formed crescent shaped partition 25 having its outer convex face 26 concentric .with the inner faces of I the teeth or vanes; 19 of the rotor, and its inner concave face concentric with the outer faces of the teeth 20 ofthe idler pinion 21 and adapted to occupy a position within the casing between theinneifaces of the rotor teeth and the'outer faces of the pinion-teeth and in the space formed by reason of the relative concentric and eccentric mounting of the rotor and idler pinion, respectively. The head plate 15 is also provided intermediate the inlet and outlet ports with rela-' tively large and small abutments 27 and 28,

respectivel the said abutments being so positioned' with-respect to the front face of the rotor 18 as to provide a space between the ship with the rotor 18 and idler pinion2l, ,the.lowermost stud, designated by the numeral 16,for securing the head plate tothe casing, is offset from the uniform spacing of the remaining studs, it being obvious that by such an arrangement, there is but one position of the head plate 15 with respect to the casing 10 where the openings in the head plate will register with the studs 16 and the stud16 mounted on the casing, thereby insuring, with absolute certainty, the proper positioning within the casing of the crescentshaped partition 25 and sealing abutments 27 and 28 carried by the head plate 15.

Referring to Fig. 2 of the drawing, it will be noted that with the rotor 18 and idler pinion 21 being driven in the direction indicated by the arrows, the pulp or other similar fluid will be drawn into the casing through the inlet port 13 and into the interdental spaces of the rotor 18 and idler pinion 21, which will carry itpast the crescent partition 25 to the outlet port 14 where it will be discharged by reason of the teeth 20 of the pinion entering the, interdental spaces of the rotor, thereby forcing the. pulp and liquid radially outwardly between the teeth or vanes 19 of the rotor and into the outlet port.

The pump as thus far described is-well known, and further description of the par- 171011181 type of pump is deemed unnecessary.

As heretofore stated, some difiiculties have arisen in the use. of this type of pump in handling wood or paper-pulp and the like, in that the tpeulp fibers in time gradually work into the arings', causing them to heat and stick, and, due to the pressure created in the pump, the pulp has a'tendency to work past the rotor into the space betweenthe rotor and the rear wall of the casing and intothe bearing a of the rotor shaft, in which case, difliculties are encountered, and if the pum isprovided with a drain .throughwhich t e .pulp and fluid between the rotor and rear wall of the casing may escape, considerable loss of pulp will result. 1

Furthermore, has been ndted that the pulp fibers have atendency to dollect and wa'd or ball up in any depressions formed within the pump casing and particularly in the relief pockets formed in the head 15 adjacent the edges of the sealing abutments 27 and 28.

To overcome these and other difficulties encountered in the use of this type of pump in handling pulp and other fluids of similar.

consistency, the present invention contemplates the use of a novel construction and arrangement whereby properly directed streams or jets of water areeniployed for keeping the bearings and rehef pockets free from the accumulation of pulp fibers, the streams or jets ion-. 21 is provided with a bronze cased rubber bushing 29 rotatably mounted on the bronze cased idler pin '22 mounted rigidly .in the head plate 15. To keep the idler pinion bearing free from the accumulation of pulp and to force back into the interior of the pump any pulp which might have a tendency to work toward the bearing, the idler pin 22 is provided with a centrally disposed longitudinally extending opening 30 adaptedto receive at its outer end the pipe or tubing 31 through which a stream of water under pressure may be injected into the interior of the idler pin. The inner end of the idler pin 22 terminates a substantial distance short of the front face of the rotor 18 and the idler plate- 32 positioned within the opening formed inthe idler, pinion 21, thereby forming a pocket or distributor head or chamber between the inner end of the pin 22 and the idler plate 32. The pin 22 may be provided also with radially extending grooves 33 "adapted to facilitate the discharge of the water from the opening 30 into the said chamber. The rubber bushing 29 is provided,

on its inner face, with a spirally formed groove 34, shown 1n the present instance, as of left hand construction, adapted to communicate at its inner end with the chamber formed between the end of the idler pin-22' and idler plate '32, and at its outer or opposite end with a pair of water passages or slots 35 formalin the inner face of the head plate adjacent the idler pin 22 and extending outwardly therefrom beyond the outer face of the bronze encased rubber bushing 29. The end or sealing faces of the teeth of the idler pinion 21 adjacent the abutments 27- and 28 are adapted to co-operate with said abutments to form a seal between the inlet and outlet ports 13 and 14, and are each provided with radially extending grooves or .slots 36 adapted to communicate at their inner ends at intervals in the course of rota 'tionof the idler pinion 21 with the water passages or slots formed in the head plate 15,

and at their outer ends with the interior of the pump. It will be observed from the foregoing description that the water under pressure from the pipe 31 will be forced through the opening 30 in the idler pin 22 and discharged at theinner end of the pin into the distributor head or chamber formed. at the lnner end thereof, thence through the spirally formed groove 34 of the idler bushing 29-int0 the passages or slots 35 formed in the head plate 15, and thence outwardly through the grooves or slots 36 formed 1n the end sealing face of the idler teeth- 21. thus forcing back into the interior of the pump any pulp fibers or the like which might otherwise work into the idler pinion bearing and interfere with the operation of the pump. This course and action of the water also keeps the bearing free from the accumulation of pulp fibers, and washes the sealing faces of the teeth 20 of the idler pinion 21 free from pulp at intervals during the rotation of the pinion, the

passages or slots 35 being so positioned in the head plate that the sealing faces of the idler pinion teeth will be washed free'of pulp,

just before passing into co-operation with the sealing abutments 27 and 28, thereby presenting a clean face of the idler teeth to the abutnients for co-operation therewith to pro vide an efi'ectual seal between the inlet and outlet ports. i

To prevent the escape or passage of pulp from the interior of the pump rearwardly pa st the rotor 18, and into the space between the-rotor and the rear wall 12 of the casing, the outer annular face of the rotor is pr vi'ded with spaced apart annular grooves or channels 37 and 38 connected together by means of-a spirally formed groove or chan nel 39 shown, in the presentinstance, as of left hand construction, the annular groove or channel 38 being providedtvith a plurality oflateral grooves or channels 40 extending longitudinally of the rotor toward the interior of the pump and positioned around the annular face of the rotor intern'iediate the teeth or vanes 19 thereof.

The annular Wall 11 of the casing 10, ad-

jacent the annular grooves 37 and 38, and" spiral groove 39 formed in theface of the and thence through the lateral grooves 40 into the'interior of the pump, thereby preventing the passage of pulp tathe rear of the rotor.

If by' any chance, the pulp fibers should under pressure from the pipe 48 suitably compressing t fixed bushing ,42 of the 7 right hand formation tating, as indicated by vided around the shaft 23 within the 42 rigidly mountei therein in a manner to receive the rotor shaft 23. Surrounding the rotor. shaft within the bearing sleeve 24 and adjacent the outer end of the bushing 42 is an annular distributor head 43, provided on its outer periphery with an annular groove 44 and on its .inner face adjacent the shaft 23 with an enlarged opening 45, the said groove and enlarged opening being connected by] means of a plurality ofradially disposed annularly spaced ports 46 formed in the distributor head. Co1nmunicating with the annular peripheral groove of the distributor head is a radially disposed port 47 formed in-the bearing sleeve 24 and ada ted to receive at its outer end a water supp y pipeor tube 48. The bushing 42 is provided on its inner face adjacent the rotor shaft 23 with a spirally formed'groove 49, shown, in the pflesent instance, as of right hand construction, and communicating at its outer endwith the enlarged opening of'the distributor head 43 and at its opposite or inner end with a. radially extending slot or groove formed in the bearing sleeve 24 where the latter terminates within the rear wall of the pump casing. It will he observed from the foregoing description that water will be forced into the distributorhead surrounding a shaft 23 and through the annular groove49 in the bushing 42, and thence out through the radially disposed slot or groove 50 into the space" between the rear of the rotor and the rear wall 12 of the pump casing, from which it may be drained by means of-a pipe 51, thereby.pre-' venting the entranoegof pulp into the bearing of the rotor shaft. To prevent the escape of water from therearor outer end ofthe bearing sleeve 24, suitable packing may be probear ng sleeve and a packing land 52 provided for epacking by means of nuts 53 in screw threaded engagement with. studs 54 mounted in,the end of'the bearing sleeve.

It will be. noted that the groove 49 in the rotor shaft 23 is of and that the shaft in rothe arrow in Fig. 3, will tend to carry thewater from the pipe 4 8 in-' wardly toward the discharge end pf the groove within the casing, while the groove 34 i of thejrotatable idler pinion bushing 29 as well as the spiral groove 39 formed on the peduring a V --holes or openings their end portionsin the pockets 55 and 56 res riphery of the rotor 18 for connecting the annular grooves 37 and 38 isof left hand formation,'this being being rotated, as indicated by the arrow in Fig. 3, and the idler pinion and its bushing being rotated in the same direction, will cause the water from the pipes or tubes 31 and 41 to be forced through the respective grooves and channels, with which they are in comnnmication, toward the interior of. the pump where the water, together with the pulp from the inlet port 13, may be passed by the teeth of the rotor 18 and ldler pinion 21 through the pump casing past the crescent partition 25 to the outlet or discharge port 14.

It will be understood, of course, that in the event'that the rotor, rotor shaft and idler pinionwere rotated in the opposite direction, the

due to the fact that the rotor spiral formation of the respective grooves 7 would be reversed. (J I,

To prevent the accumulation and Wadding or balling up of the pulp fibers inithe portion of the relief ockets formed in the head 15 adjacent the a utments 27 and 28, the head is provided, adjacent the edges of said abutments, with a pluralit of' radially disposed pockets 55 and 56, havmg'lateralopenings:57 adapted to receivewater supply pipes 58 and 59, the pipes 58 being adapted to supply water under pressure edges of the larger 59 to supply water to adjacent the edges of the smaller abutment 281 Formed in the head plate adjacent the abutments 27 and 28are a series of spray 60 terminating at one of the pockets 55 and 56 and at their opposite end rtions "within the relief pockets formed in t e inner face of the plate 15. .It will be observed from the foregoing description that water under pressure from the pipes or tubes 58 and 59 will enter ectively, the said pockets serving as headers of the water to the pray holes 60, where it is forced into the relief pockets formed in the head, thereby keeping the said relief pockets free from the accumulation of pulp fiber, and keeping 'the pulp at these points agitated-in a manner to be easily handled vby the teeth of the rotor 18 andthe idler pinion 21, T

To prevent the wedging of pulp tibersbetween the ripheral faces 19 and the inner face of the annular wall portion 1,1,of the ca ing, it will be noted by reference to Fig. 2 t at the sides of the inlet and outlet ports 13 and 14, where the teethr19 of r the rotor 18 come into -co-operative relationship with the inner ,face of the annular wal 11, are formed with sharp edges as indicate at operation with the peripheral edges of the rotor teeth or vanes 19, a-cutting or shearmg actionfor severing any pulp fibers which may 5f the rotor teeth X in said figure, thereby producing, in 00- be caught betweenthe edges of the rotor teeth and the. edge portion'of the inlet and ports at these'points.

The head plate 15 is .prdvided with suitably positioned flush-out openings 61 normally closed by means of plugs 62, and if it should be desired to flush out the interior of the pump when the latter is to be shut down for any considerable length of time, the plugs 62 may be removed and suitable pipe connections 63, one of which is shown .in dotted lines in Fig. 3, may be inserted in the flush-out openings 61, through which water under pressure. may be injected into the pump for thoroughly washing out any pulp fibers that may have adhered to the interior thereof or to any of the parts of the rotor 18 oridlerpinion 21. Should it be desired at such a time to flush out also the rear portion of the pumpcasing between the rotor 18 and the rear wall 12, the wall 12 is )IOVldBCl with a flush-out opening 64 in whic may-be inserted a water supply pipe65 through which a stream of water may e injected intothe rear portion of, the easing and drained therefrom by the pipe 51.

- Q If it should be found, in'the operation of the pump,thatthere-is a tendency of the rotor to thrust rearwardl in the casing, due to pressure created in t 1e interior of the pump,- thereby producing excessive friction between the hub of the rotor and the inner end of the bearing sleeve 24, the opening 64 in the rear wall 12, and the hole in which the drain pipe 51 is normally mounted, maybe closed by means of plugs 66 indicated, by dotted lines in Fig. 3, therebypermitting the space between the rotor 18 and the rear wall 12 of the casing to fill with water from the pipe 48 side of the rotor to offset or counter-balance the pressure exerted on the rotor from the opposite side thereof or in the interior of the pump, and by so doing relievethefriction' be tween the hub of the rotor and the inner end of the bearing sleeve 24. The pressure set up in the space between the rotor and the rear of the pump with water for keeping the bearin'gs and other parts of the pump free from the accumulation of pulp fibers and for forcing the fibers toward the interior of the pump. In the arrangement shown, a main supply pipe 67 is provided, having one of its ends connected with a suitable source of water supply under pressure, and at its opposite end outlet tage in variously with a header 68 having suitable connections with the pipes 48, 41, 59, 31 and 58 for conveying water to the various parts of the pump for the purposes heretofore described. Fig.

8 also shows a pulp supply pipe 69 connected with the inlet port 13 and a pipe 70 connected to the outlet ort 14 for the dispositionef the pulp in any esired manner.

The use of rubber or resilient bushings in the bearings of the rotor shaft and idler pinion as above described, has been found to be of material advantage in that in the event of any foreign matter entering the bushing by reason of the pump being operated during tem orary failure of water supply or because of t e presence of foreign matterin the water supply itself, the bushing, by reason of its resiliency, may yield sufiiciently to prevent the heating or scorin of any of the rotating parts, and also to enable such foreign matter to eventually free itself and be carried out of the pump byway of the water channels and grooves associated with the bearings of the rotor and idler pinion and other parts of the pump.

Itwill be observed from the description contained in the foregoing specification, that the present invention provides a novel construction and arrangement of elements for severing any pulp fibers engaged between the rotor vanes and the casing, thereby preventing the rolling andjamming of pulp between the casing and rotor; insuring the proper positioning of thehead late on the casing in a manner to position t e crescent partition and sealing abutments accurately with respect to otherco-operating arts of the pump, insuring the removal of pulp from, and reventing its accumulation adjacent said a ut ments; continuously forcing the pulp toward the interior of the pump, and kee ing the bearings of the rotor and idler free rom any accumulation of pulp; washing the sealing faces of the idler teeth free of pulp before passing into co-operative relationship with the'sealing abutments; flushing out the interior of the pump preventing the passage of pulp to the rear of the rotor, thereby eliminating the loss of considerable pulp by way of the waste ,or drain pipe; relieving excessive friction at the hub of the rotor, due to end thrust of therotor in the casing; and for improving devices of the character described in sundry details heretofore pointed out.

Obviously, the present invention is not limited to the precise constructionand arrangement shown and described, as the same may be variously modified without departing from the spirit and ,scope of the invention as set forth in the appended claims. -='Moreover, all the features of th'einvention need not be used conjointly, as the same maybe used to advansub-eombin ations.

different combinations and v What I claim as my invention and desire to secure by Letters Patent is:

1. A rota pump comprising a casing having inlet an outlet ports formed therein, a rotor and idler pinionournalled in said casing, and means associated with said rotor and pinion for admitting water under pressure for forcing the material to be operated upon toward the interior of the pump.

2. A rotary pump comprising a casing having inletrand outlet ports formed therein, a'rotor and idler pinion journalled in said ing inlet rotorand idlerv'pinion journalled in said casing, and means formed on said rotor for forcin the material to be operated upon toward t e interior of the pump.

3. A rotary pump comprising a casing having inlet and outletports formed therein, a rotor and idler pinion journalled in said casing, and means formed in the bearing of said rotor for forcing the material to be'operated up'on. toward the interior of the pump.

4. A rotary pump comprising a casing having inlet'and outlet'ports formed therein, a rotor and idler pinion journalled in said casing, and means formed in the bearing. of,

casing intermediate said ports and co-operable with each other in a manner to pass the material who operated upon from said inlet vto-said outlet port, and means formed in the bearings of sand rotor and pinion for admitting water under pressure thereto. for preventing said material from entering or accumulating' in said bearings.

7. A. rotary pump comprising a casing having an open end portion and inlet and outlet formed therein, a rotor having vanes g rmed thereon and an idler pinion journalled'in said casing intermediate said'ports', said inion being mounted within and eccentri y withct to said rotor and havin teeth co-operab e with said vanes, a hea plate having water passages .formed therein secured to said casin for closing the .open

. end thereof, means or suplplyin water to said passages, a crescent-s ape partit1on carried by said position varies in the vertical plane thereof and-intermediate said ports, and a lurality of sealing abutments formed on sai, late and adapte to oo-operate with the end aces of said rotor vanes an'd-said pinion for prov dlng a seal .tionship' with said abutments.

head plate and adapted to be between said pinion and rotor within said casing intermediate said ports,

said pinion having a plurality of grooves formed in its end portion adjacent said head plate and extendin radially along the ends of the teeth of sai pinion, said grooves be-' ing adapted to communicate at their ends with the interior of said casing and at their inner ends with said water passages at intervals in the course of rotation of said pinion, said water passages being positioned with respect to said sealing abutments in a manner to permit a stream of water to be projected radially along the end of each pinion tooth just prior to the passage of the sealing end or face of each tooth into co-operative rela 8. A rotary pump comprising a casing having an open end portion and inlet and outlet ports formed therein, arotor having vanesformed thereon, and an idler. pinion jour-' nalled in said casing intermediate said ports, said inion being mounted within and eccentrica ly with respect to said rotor and having teeth co-operable with said vanes, a head' plate having water passages formed therein secured to said casing for closing the open H end thereof, an idler pin mounted in said tending therethrough, means for supplying water under pressure to saidopening, a resilient bushing interposed between said pinion and idler pin and having a spiral groove adapted to communica e with said longitudi nal opening and saidw t'er passages for supplyin water to said passages, a crescentshape partition carried by said head plate and adapted to be positioned between said.

vertical plane pinion and rotor vanes in the plate and having a longitudinal opening exj thereof and intermediate said ports, and aplurality of sealing abutments formed on said late and adapted to 'co-operate with the ios end aces of said rotor vanes and said pinion for roviding afseal within said casing inter .m iate said ports, said pinion havin a plurality of grooves formed in its end portion adjacent said head plate and extending radi'-. ally along the ends of the teeth of said-pinion, said grooves being adapted to communicate at their outer ends with the interior of saidcasing and at their inner ends withsaid water passages at intervals in the course of rotation of said pinion, said water assages being. positioned with respect to sai sealing a stream of abutments in a manner to permit water to be pro ected radially along the end of each pinion'tooth just prior to the passage of the sealing en'dor face of each tooth into co-operative relationship with said abutments. p I

' 9. A rotary pump comprising a casinghav ing an open end portion and inlet and outlet orts formed therein, a rotor and cooperatmg idler pinion journalled in said casing, a head plate having water 1 passages formed therein secured to said casing for closing mounted in said plate and having a longituform a distri utor chamber between said roing vanes formed thereon and an idler pinion journalled in said casing, and means formed on said annular wall portionadjacent said ports and co-operable with a peripheral edge portion of said vanes for severing pulp fibers 'eng: iged between said vanes and the annular.

wall of said casing adjacent said ports.

14. A rotary pump comprising a casing the open end thereof, an idler pin rigidly dinal opening extending therethrough, said pin being adapted to extend inwardly from said pla e toward said rotor in a manner to tor and the-end of said pin, a resilient bushing having a spiral groove formed thereinasecured to said pinion and rotatably mounted on said pin, said groove communicating at its\ in, and a rotor having vanes formed thereon opposite ends with said chamber and water and an idler pinion journalled in said casing, passages respectively, and means for-supplysaid pinion being adapted to co-operate with ing water'oosaidlon 'tudinal opening in said the vanes f idl'ot l r passing the mapinto be conducted-tirough said opening, disterial' to be operated upon-from said inlet tributor chamber and spiral groove to said. port to said outlet port, said rotor having Water passages. 1 r means formed thereon for forcing said ma- 10. A rotary pump comprising a casing terial toward the interior-of said casing and having an open-end portion and inlet and outpre n ing the passage of said material. to let ports formed therein, a rotor and cothe rear of said rotor and easing. operating idler pinion journalled insaid case 1?. A rotary pump comprising a casing ing, a head plate having water passages havlnginlet and outlet ports formed therein, form d th rein ur d t aid casing for a rotor having vanes formed thereon and an closing the open end thereof, an idler in idler pinion journalled in said casing,'said rigidly mounted in. aid late and having pinion being adapted to co-opei'ate with the a longitudinal opening extending there- Vanesof said rotorfor passing the material through, said pin being adapted to extend to be operated upon from said inlet port inwardly from said plate toward said rotor to said outlet port, and means for supplying in a manner to form a distributor chamber Water t0 illle'infeliol' f S ng adjace t between said rotor and the end of said pin, he rotor, said rotor having means form d a resilient bushing having a spiral groove thereon for forcing the water from said supformed therein secured to said pinion and p y-m ns w rd the interior of said pump.

rotatably mounted on said pin, said groove 16. A rotary pump comprisi g Casing communicating at its opposite ends with said h v g inlet nd O et p rts formed therein,

chamberand water, assag'es respectively, said a rotor having vanes formed thereon and an lmon havlng ra ially extending grooves idler pin on ournalled in said casing, said ormed in one of its on portions, said radlal plnlonbe ng adapted to eo-operate wlth the grooves being adapted to communicate at Vanes'of said. rotor for passing the material their inner ends with the water passages r p ra d pon from said inlet port to formed in said head and at) their outer ends sald Outlet port, and means for supplying ith th 'i t i f id i nd means water to the interior of said casing adjacent for supplying water to said longitudinal etp lpll ly of the rotor,

opening in sfiid pin to be conducted through fcommu'nicflting p al and annular grooves said opening, distributor chamber, spiral f m 11 the P p y thereof fldjfwelifi groove, water passages and radially extend id Water Supply; means for forcing the ing grooves tothe interior of said casing. C from said pply means- W ,Said

11.A rotary pump comprising a casing van and having inlet and outlet ports formed therein, l-d pump. p arotor having vanes formed thereon. and an F A r tary pump comprising a easing idler pinion journalled in. aid asing, and havlng inlet and outlet ports formed therein, means formedon said casing and co-operable a r0tor having vanes formed thereon and an with said vanes for producing a cutting or Idler pin on ou-rnalled in said casing, said h i ti on l fib r gag d b pinion being adapted to co-operate with the tween id vanes d in vanes of said rotor for passing the material 12. A rotary pump comprising a casing t0 'be operated upon from saidinlet port to having inlet and outlet ports formed therein, said outlet port, and a pipe for supplying having inlet and outlet ports formed there said rotor having pinion and toward the interior of 7 a rotor having vanes formed thereon, and W r t h n ri r f said casing adjacent an idler pinion journalled in said casing, the periphery ofthe rotor, said rotor having and means formed on ,said casing adjacent longitudinally spaced apart annular grooves said ports and co-operable with said vanes 'for formed on the periphery thereof adjacent producingngcutting or shearing action on said pipe and nulargrooves, said rotor having formed also 13. A- rotary pump comprising a casing on its periphery a plurality of annularly having an annular wall portion and inlet spaced longitudlnally disposed grooves com and outlet ports formed therein, a rotor havmunicating at one of their end portions with V aspirally formed groove compulp "fibers engaged between saldvanes and municatmg at 1ts opposite ends with said an- I casingfachacent said ports.

the annular groove adjacent said vanes and at their opposite end portions with the spaces between the vanes of said rotor. I

18. A rotary pump comprising a casing having inlet and outlet ports formed therein,

a shaft rotatably mounted in said casing, a

rotor secured to said shaft within said casing, a bushing having a spiral groove formed therein surrounding said shaft, and means for passing a stream of water through said groove.

19. A rotary pump comprising a casing having inlet and outlet ports formed therein, a shaft rotatably mounted in said casing, a rotor secured to said shaft within said casing, an annular distributor head surrounding said shaft, a resilient bushing having a spiral groove formed therein surrounding said shaft, said groove communicating at one end with said distributor head and at its opposite end with the interior of said casing, means for supplying Water to said head for passage through said groove to the interior-of said casing and means for draining the water from said casing. p

20. A rotary pump comprising a casing having inlet and outlet ports formed therein,

, a shaft rotatably mounted insaid casing,- a

rotor secured to said shaft within said casing, an annular distributor head surrounding said shaft,'a packing gland co-operable with ,a portion of said head for compressing packing material to prevent the escape of water from one side of said head, a resilient bushing having a spira'l' groove formed therein surrounding said shaft between said distributor head and said casing, said groove communieating at one end with said distributor and at its opposite end with the interior of said casing, means for supplyin water to said head for passa e through said groove to casing, and-meansfor draining the water from said casing.

21. A rotary pump comprising a casing having inlet and outlet ports formed therein, a bearing sleeve rigidly secured to said casing and havin a radial groove formed in the inner end t ereof, a shaft rotatablyimounted in said sleeve, an annular .jdistributor head mounted in said sleeve and surrounding said shaft, a? resilient bushing having a spiral groove surrounding said shaft withi'n said sleeve, said spiral groove communicating at one of its ends with said distributor head and at its opposite end with said radial groove,

' a water inlet port formed in said sleeve and communicating with said distributor head, a

1 water supply pipe .communicating'with said.

water inlet port,'and means co-operable with said distributor head. for preventing the escape of water from one sid thereof.

22-. A rotary pump comprising a casing having inlet and outlet ports formed therein, 'a rgtor and idler pinion journalled in said cas ng intermediate said ports, a sealing abutment co-operable with said rotor and pinion for providing a seal within said casi ing intermediate said ports, and means for projecting water into the interior of said ing for closing the open end thereof, sealing abutments formed on said plate and co-operable with said rotor and pinion for providing a seal within said casing intermediate said ports, and means for projecting a spray of waterinto the interior of saidcasing adjacent the edges of said abutments.

g 24. A rotary pump comprising a casing having an open end portion and inlet and outlet ports formedtherein, a'rotor and idler pinion journalledi in said casing intermediate said ports, a headplate secured to said ms ing forclosing the open ifd there0f,sea ling i abutments formed on said plate and co-opering a seal within said casing intermediate said ports, said plate having a plurality of of water pockets formed in the body portion thereof and a plurality of spray holes (30111 municating with the interior of said casingand with said water pockets, and means for supplying water tosaid pockets.

25. A rotary pump comprising a casing ing a utments formed on said plate and cooperable with saidrotor and pinionfor providing-"a seal within said casing intermediate said ports, said plate having a plurality of substantially radially disposed water pockets formed in the body portion thereof and a plurality of spray holes adjacent the edges of said abutments, said holes communicating with the interior of said casing and with each able with said rotor and pinion for provid-' for closing the open end thereof, seal-' of said water pockets, and a pipe-for supply-- I ing water to said pockets. I

26. A rotary pump comprising a' casin having an open end portion and inlet an outlet ports formed therein, a rotor and idler pinion journalled in said casing intermediate said ports, a head plate secured to said casing for closing theopen end thereof, sealing abutments formed on said plate and copper-able withv said rotor and pinion for providing a of said abutments, said series of spray ho es communicating with the interior of. said c'assealwithigi said caslng intermediate said: ports, said plate having at-plurality of subv ing and respectively with each of said water pockets, and said pockets.-

27. A rotary pump comprising a casing having a rear wall port-ion, a rotor journalled in said casing in a manner to provide a space or chamber between said rotor and rear wall portion, and means for forcing water into said chamber to create a pressure therein tending to separate said rotor from said wall portion for counter-balancing pressure exerted on the opposite side of said rotor.

28. A rotary pump comprising a casing having a rear wall portion, a shaft rotatably mounted in said casing. a rotor mounted on said shaft, said rotor being positioned in the casing in a manner to provide a space or pipes for supplying water to chamber between said rotor and rear wall portion, and means associated with the bearing of said rotor shaft for forcing Water into said chamber to create a pressure therein tending to separate said rotor from said wall portion for counter-balancing pressure exerted on the opposite side of said rotor;

2Q. A rotary pump comprising a casing having a rear wall portlon, a shaft rotatably mounted in said casing, a rotor mounted on said shaft, said rotor being positioned in the casing in a manner to provide a space or chamber between said rotor and rear wall portion, and means associated with .the bearin said casing in a manner to provide a space or chamber between said rotor and rear wall portion, said wall portionhaving a plurality of openings formed therein, means for closing said openings, and means for forcing water into said chamber to create a pressure therein tending to separate'said rotor from said rear wall portion.

31'. A rotary pump comprising a casing having an open end portion and inlet and outlet ports formed therein, a rotor mountedto rotate in said casing, a head plate having water passages formed therein secured to said casing for closing the open end thereof, an idler pinion having a central opening formed therein and having an idler plate positioned in one end of said opening, an idler pin mounted on-said head plate and adapted to extend into the opening in said pinion in a manner to form a distributor chamber within said pinion and between said idler plate and the end of said pin, a resilient bushing having a spiral groove formed therein secured to said pinion and rotatably mounted on said pin, said groove communicating at its opposite ends with said chamber and water passages respeetivel y, and means for supplying Water to said longitudinal openingin said pin to be conducted through saidopening, distributor chamber and spiral groove to said water passages.

32. A rotary pump compris nga casing having open end portion and inlet and outlet ports formed therein, a head plate secured to said casing for closing the open end thereof, a rotor and idler pinion journaled'to rotate in saidcasing intermediate said ports, means formed-in said casing and plate for admitting water under pressure to 'said casing for forcing the material to be operated upon toward the interior of the pump during its passage therethrough and for flushing out the interior of said casing.

In testimony whereof I have signed my name to this specification on this 16th day of March, A. D. 1927.

AMOS VERNER JENSEN.

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