US2460821A - Oscillating vane rotary pump - Google Patents

Description

Feb. 8, 1949. J. o. HAMREN 2,460,821

7 OSCILLATING VANE ROTARY PUMP Filed Sept. 3, 1942 3 Sheets-Sheet 1 INVENTOR.

HTTVFIYE) Joana/0. flan rm Feb. '8, 1949. o, HAMREN OSCILLA'IING VANE ROTARY PUMP Filed Sept. 5, 1942 3 Sheets-Sheet 2 Feb. 8, 1949. J. o. HAMREN OSCILLATING VANE ROTARY PUMP Filed Se t. 3, 1942 3 Sheets-Sheet 3 N R 5 -MW H WW H W Z;

Patented Feb. 8, 1949 UNITED STATES PATENT OFFICE.

2,480,821 v oscnlm'rme vans ao'raar rum, Joseph 0. Hamren, Minneapolis. Minn.

Application September 3, 1942, SerialNo. 457,129

cient, and one in which the discharge can be regulated to vary the torque effort of the pump.

It is a further object of the invention to provide a pump having a stator in the form of a cam having a chamber therein with which the 1 inlet of the pump communicates, said cam having openings at opposite sides thereof and a rotor comprising a plurality of circumferentlally arranged swinging vanes having free ends with 2 casing secured within said casing, said ,nrst mentioned casing forming a chamber about said inner casing and having inlet chambers at the end por tions thereof, said inner casing having an inner 5 cylindrical wall, cam members secured in said inner casing having chambers therein extending about said shaft with openingsat opposite sides thereof, said chambers communicating with said inlet chambers, a rotor secured to said shaft having a central disk-like portion extending between said cams to the wall of said inner casing, a multiplicity of pins carried in the outer portion of said disk-like portion and projecting from opposite sides thereof parallel to said shaft} a swinging surfaces adapted to rotate in engagement with Vane mounted on each of Said D1118 a ing a free said cam, said vanes being closely surrounded by a casing having a discharge opening therethrough together with means for rotating said rotor with the free ends of said vane advancing.

end with aconvex surface adapted to ride on its respective cam in the rotation of said rotor, said inner casing having discharge openings therethrough equal in number to the number of open- It is another object of the invention to provide ings thmugh said cm and means 7 a pump as set forth in the preceding paragraph together with means for variably restricting said openings through said cam member to vary the torque or rotative efiort or turning moment of said pump.

It is more specifically an object of the invention to provide a pump comprising an outer casing, a shaft Journalled in and extending through said casing, said casing having an inlet chamber at one end thereof, an inner casing secured in said casing having a cylindrical inner wall, a cam member within said inner casing having a chamber therein and extending about said shaft, said cam member having openings at opposite sides thereof, a rotor secured to said shaft having a disk-like portion extending to the wall of said inner casing, a multiplicity of swinging vanes carried on said disk-like portion having free ends with curved surfaces adapted to rotate in engagement with said cam and having hub portions substantially engaging the wall of said inner casing, said chamber within said cam communicating with said inlet chamber of said first mentioned casing, said first mentioned casing forming a chamber about said inner casing and said inner casing having openings equal in number to the openings through said cam leading to said last mentioned chamber together with means for rotating said rotor with the free ends of said vanes advancing.

It is still further an object of the invention to provide a pump as set forth in the preceding paragraph with movable members in the openings through said cam member and means operable from the outer side of said first mentioned casing 55 ing through said casing. An oil ring or packing for moving said members to variably restrict said openings.

It is also an oblect of the invention to provide a pump comprising a casing,-a-shaft Journalled in and extending through-sai-d casing, an inner 60 25 paragraph with movable members in the openings through said cam members and means operable from the outer side of said first mentioned casing for moving said last mentioned members to variably restrict, said openings through said cam members to vary the torque or rotative effort or turning moment of said pump.

These and other objects and advantages of the invention will be fullyset forth in the following description made in connection with the accompanying drawings in which like reference characters refer to similar parts throughout the several views and in which:

Fig. 1 is a view for the most part in centralvertical section through said pump and-a portion 40 of a transmission unit connected thereto, the

other portion of said unit being shown in side elevation;

Fig. 2 is a vertical section taken on line 2 -2 of Fig. 1 as indicated by the arrows;

Fig. 3 is a partial vertical section taken on line H of Fig. 2; and

Fig. 4 is a vertical section taken on 'lii'le'H of Fig. 1 as indicated by the arrows." H

Referring to the drawings, a pump 'is shown comprising an'outer casing ill havingjend members lla and llb having flanges secured to a central and generally cylindrical portion llc. Portions Illa and "lb have secured therein ball bearings H in which is journalled a shaft l2 extendpinsll.

are eccentric tothe axis of shaft".

posed in each of the end members Illa and lb and secured by screws l6 having heads countersunk in said plates. End members Illa and lb are secured to the central portion ||lc by circumferentially spaced headed bolts i'l and'said' end members have chambers "Id and llle therein which constitute the inlet chambers for said pump. It will be noted that end members la and lb have openings l leading from chambers Id and We inwardly. Casing III at opposite sides has bosses my and lllv to which are secured connecting members I8 and I8 forming the discharge members or conduits into which the discharge conduits will be suitably connected. Passages "In and IM extend through bosses lllg, said passages tapering inwardly. a

End members I00. and Nb are rabbeted at their inner ends to form flanges about which extends the cylindrical wall 20a of an inner casing 20', said member 20a. being secured by dowel End plates 20b of said inner-casing which are 'of annular form, fit within member 20a'and are secured thereto by the circumferentially spaced screws 22, having their ends countersunk in member 2041. Member 20a has a cylindrical inner wall. A rotor 24 has a hub securedvto shaft II by a plurality of circumferentially-spaced keys 25 and a disk-like portion 24a extends centrally from said rotor to the inner wall of member 20a. Spacer members 23'are disposed on shaft I! at each end of the hub of member secured to each end plate 201) so that they are disposed at each side of disk-like portion 24a and in engagement .with the latter. End I members 20b are recessed to receive flanges on cam members 21 and said cam members are respectively secured to said end plates by the headed bolts 28 having their heads countersunk in said cam members. Cam members 21 have chambers therein, which chambers are open at their outer ends, the openings in said outer ends being aligned with the openings in said end plates 20b and the openings in the latter communicate with the openings or passages I09 so that there is a passage from the inlet chambers Md and We respectively into the cams 21. Cam members 21 have openings 21a at opposite sides thereofand while the-number of these openings may be varied, in the embodiment of the invention illustratedsaidopenings are shown as four in number. It will be noted as shown in Fig. 4,

that said cams have outer surfaces 21b which The disklike portion 240. has secured therein adjacent fits periphery a multiplicity of pins 30. Pins 30 are circumferentially spaced and project at opposite sides; of portion 24a having their axes parallel to the axis'of shaft l2 and the pins at opposite sides of disk 24a. are arranged in staggered relation. Pins 36 have their ends threaded the side of portion 24a. Journalled on each pin 38 including the portion 38a, is a vane 3|. Each vane has-a hub portionextending about pin30, .which hubgportion is in substantial engagement with theinner wallof member 20a. Said vanes I have free-ends and these are provided with convex surfaces 3| a-which are adapted to rotate in tially spaced screws 33, said rings 32 being disposed in and adapted to rotate in annular grooves in the end plates 24b. The openings 21a in cam members 21 are formed in part of semi-cylindrical form' and valves 35 are disposed in said openings extending lengthwise of cam members 21., Each plate or valve 35 is carried on a shaft 36 and is secured thereto by the spaced screws 34 as shown in Fig. 3. Shafts 36 are journalled in the end membersflb and at the outer side of said end members have secured thereto arms 31. While these arms may be secured in any manner, they are illustrated as secured by pins 38a. Arms '31 incline outwardly through the passages Illf'and at their outer ends are bifurcated to embrace a ring 38 to which they are pivotally connected by a headed pin 39 held in place by a cotter pin 40. Ring 38 has inwardly projecting arms 38c adapted to engage and ride upon the hub of end plate |0b which contains the bearing The ring 38 is provided at one portion, shown as the upper portion thereof, with rack teeth 38b and these are engaged by a pinion or teeth 4|a formed on the lower end of a shaft 4| which extends upwardly and is journalled in the end plate of easing In. It will be understood that there are two rings 38 and one shaft 4| is journalled in end plate Illa and the other shaft-4| is journalled in end plate lob. End plate la is recessed to receive. a collar 42 having a conicalrecess in its upper endand packing material 43 is disposed abouta reduced portion of shaft 4| and engaged at its upper end by a gland 44, the top of which contacts an arm 45 secured to shaft 4| and-held in place by a castle nut 46 threaded on the -upper end of shaft 4|. A similar construction and arrangement of the same parts is shown for shaft 4| in end plate lob, which shaft has an arm 41 secured thereto. It

'. will be seen that by rotating the arms 45 and 41 that shaft 4| will be rotated and rings 38 will be moved about their axes to swing arms 31, thus turning shafts 36 and moving plates 35 about longitudinal axes to more or less restrict the openings 21a. The outer ends of shafts 36 are also journalled in the hubs of the end plates |0a and lb, said hubs being provided'with circumferentially spaced bosses I01 bored to receive said shafts.

The end members "la. and lllb are provided with circumferentially spaced holes or passages ||llc whichcommunicate with the chambers Id and we respectively. A sleeve 50 is provided which closely fits on and is rotatable on the outer cylindrical surface of casing portion 20a.

Said sleeve has flanges 50a at each end and these fit against the inner sides of end members Illa and lb respectively; It will be noted that the outer casing portion Hlc extends about sleeve 50 and forms a chamber lllm thereabout. Flanges 50a are'provided with circumferentially spaced holes or passages 5% adapted to be brought into and out of register with passages or holes |0k. Theinne'r casing member 26a has openings or passages 20d therethrough, one being shown for each of the cam openings 21a and openings 20d are thus four in number and circumferentially spaced equally about member 20a. The sleeve 50 has openings or passages 50d registering with the passages 20d and of suflicient 5. length circumierentially so that they will always register with passages lid in the rotation or oscillation of said sleeve. Sleeve II is adapted to be oscillated and for this purpose has secured thereto at its outer side in chamber llm a rack ll. Rack II is engaged by a pinion ll secured to the inner end of a shaft I! extending outwardly through a boss Iln on casing member lie to the outer end of which is secured an arm I4. Arm It as well as arms 45 and 41, are shown as having bifurcated and transversely bored outer ends adapted to be connected to a suitable control member or lever. Boss iln is bored and an oil packing ring I is disposed at the bottom of said bore about shaft II, the same being surmounted by a collar ll having a conical upper-surface and packing material 81 is disposed in said member 56 about shaft 83 and is engaged by a gland member 58 which is in turn engaged at its upper end by the hub of arm 54. A nut 59 shown as of the castle type is shown as threaded on the upper end of shaft 53 and holds arm It in place. Sleeve has secured to its end flange in any suitable manner as by welding a plate ill movable in contact with the inner cylindrical wall of portion Me and adapted to be moved over the,

inner end of passage iflh to more orless close said passage. A plate 6| at the opposite side of member lilo is also secured to sleeve 50 as is plate 60 and has an opening or slot la at its central portion. Plate ii is arranged to be moved more or less over the inner end of passage Mi as sleeve 50 is moved to more or less restrict passage lli.

The casing Ill has an inlet passage or chamber ifip shown as at its lower end and this communicates through the passages ilq at the ends thereof with the inlet chambers lld and we respectively. The chamber tip is shown as in communication with a passage I01 formed in a portion 65a of a, casing member 65 of a transmission unit. Said casing it is illustrated as secured to the casing ill and specifically to member We by the spaced headed and nutted bolts 66.

The pump and the transmission unit in casing 65 thus constitute one structural assembly. It will of course, be understood that the pump could be separate and used for other purposes than that of supplying a fluid or liquid ,to said transmission unit. Said transmission unit is of the type disclosed and claimed in applicant's co-pending application S. N. 376,626, flied January 31, 1941, now issued as Patent No. 2,404,229, granted July 16, 1946 and the same comprises a cam member I it and vanes ll carried on a rotor. which rotor is disposed within the inner casing 12. It is believed that further description of the transmission unit will'be unnecessary.

In operation, fluid or liquid will be supplied to the inlet chamber iflp in any suitable manner as from the return passage ibr from said transmission unit and this liquid will pass through passages liiq to the inlet chambers lid and lie. The liquid will thenpass through passages ii! and cams El to the inner side of cams 21.1 Shaft Q! will be driven in any suitable manner and this will rotate the rotor 2d. The rotor is rotated in a direction so that the free ends of the vanes 3i will advance, which directiozr is indicated bythe arrows in Fig. 4. As the vanes are carried about, their surfaces 38a ride on the cam surfaces 27-h and the position of the vanes is changed as shown in Fig. 4. The vanes pass the openings 21a and as shown at the upper left hand corner of Fig.

it will be seen that the chamber between the periphery of the cam and the two vanes in contact is quite small. As the rotor advances the positions of the vanes change so that the chamber between the vanes is enlarged. This causes a suction which draws the liquid from the inner side of cam members 21 through openings Ila-into the chamber between said cam members and casing 2B. As the rotor continues to revolve, the enlarged chamber between vanes II is again reduced as the vanes pass the openings Ilid and the fluid is forced out through the openings Ild'and through openings [id in sleeve ll into the chamber between sleeve II and the outer casing II. From this chamber it passes through passages lOh or l0! to discharge members I. and II. with the members or plates 35 in the position shown in Fig. 4, the pump can deliver its maximum of fluid or liquid. The amount of liquid handled can be reduced by moving theplates 35 and this can be done by oscillating arms I! and 41 to oscillate shafts ll causing the toothed portions lid to rotate ring 38 and swing arms 31, thus oscillating shafts 36 and plates 35. By reducing the amount of fluid or liquid passing through the pump or the cam members 21 the torque eflort of the pump can be increased. The sleeve Bl can be rotated or oscillated on casing member. 20a by swinging arm 54. This rotates shalt SI and pinion 5! acts on rack 5| causing rotation of sleeve 50. When the pump is delivering fluid the openings or passages llik and "b are out of alignment as indicated in Fig. 4. At this time ordinarily one of the passages "h and iii is closed with passage iii and open the latter. With the construction of plates t0 and 8| shown both passages I02 and illh may be partly open. Fluid could then be discharged through both outlets I! and IS. The sleeve can be oscillated to bring passages 50b and "Us into register and at this time passages Hill and llli are both closed. The fluid would then merely be bypassed from chamber Him-through passages 50b and llik into the inlet chambers We and "Id and would be moved again through the cam members 21 and discharged through openings 20d and 80d into chamber Him. The fluid would thus circulate idly in the pump.

, stated, thechange in position of'vanes 3| causes through the inner openings of end plates 20b and 2- From the above description it will be seen that I have provided a simple and eflicient rotary pump and one in which the driving shaft is concentric with the wall ofthe pump casing. As

a change in thevolume of the chambers there between giving the pumping action and the pumping action may also be increased by a centrifugal action of vanes it as the rotor rotates at highspeed. The pump is capable of pumping any kind of fluid and will be particularly useful in pumping fluid such as oil. The structure is very compact and easily maintained. There will be an oil fllm on the inner wall of casing portion filo and also on cam member 21 so that with these portions made of hard material there will be little wear. It will be obvious that the device will have a high degree of utility for the purpose intended.

It will of course, be understood that various changes may be made in the form, details, arrangement and proportions of the parts, without departing from the scope of applicant's invention, which meaty stated, consists in a device capable of carrying out the objects above set forth, in --the parts 'and combinations of Parts disclosed and .deflned in the appended, claims.

I, What is claimed is:

1. A pump having in combination, a casing having an inlet chamber therein, a shaft iournailed-in and extending through said casing, a

cem member surrounding said shaft and having achamber therein communicating with said inlet chamber and adapted to receive fiuidthereirom, a rotor in said casing secured to said shaft and comprising -a plurality of swinging vanes carried thereon,- each 'vane having a free end with a surface adapted to rotate in engagement with said cam-memben said cam member having a plural ity of equally and circumferentlally spaced open-- ingstherethrough, an inner casing closely sursaid outlet chamber equal in number to the openings. through said cam member, a valve member disposedin each of said openings through said cam member adapted to be oscillated for variably restricting said openings through said cam member to vary the torque of said pump, pivot members secured to said valve members, arms a iourn'aled inand extending thro sh said casing, a second casing secured in saidfirst mentioned casing and spaced from the wall of said first mentioned. casing to form a discharge chamber between said casings. a rotor in said second casing having a hub secured to said shaft and having a disk-like portion extending to the wall of said second casing, a cam member at each side of said disk-like portion,-each cam member having a chamber therein surrounding said hub, communicating with said inlet chambers respectively and having a plurality of circumferentially and equallyspaced openings therethrough from said secured to said pivot members, a ring secured to said arms and rotatable for swinging said arms and means at the outer side of said first mentioned casing for rotating said ring.

2. A pump having in combination, a casing having inlet chambers therein at its ends, a shaft iournalled in and extending through said casing,

asecond casing secured in said first mentioned casing and spaced fromthe wall of said first mentioned casing to form a discharge chamber thereabout, a rotor in said second'casing having a hub secured to said shaft and having a disklike portion extendingto the wall'of said second casing, a cam member at each side of said disk like portion, each cam member having a chamber therein surrounding said hub, communicating with said inlet chambers respectivel and having a plurality of circumferentially and equally spaced openings therethrough from said chamber therein into said second casing, a plu-' rality of-swinging vanes carried by said disk-like portion, said vanes being equally and circumferentially spaced at each side of said disk-like portion and having free ends with convex surfaces adapted to rotate in engagement with said cam members respectively, said second casing havinn equally and circumferentially spaced openings equal innumber to the openings in each of said cam members leading to said: discharge chamber, a valve member disposed in each of said openings through said cam members and adapted to be'oscillated for variably restricting said openings through said cam members to vary the torque of said pump, pivot members secured to said valve members, arms secured to said pivot members, aring at each end of said casing secured to said arms connected to the valve members of each cam member respectively, said rings being rotatable for swingin said arms and moving said valve members and means at. the outer side of said first mentioned casing for rotating said'rings. 3. A pump having in combination, a. casing having inlet. chambers therein at its ends, a shaft chamber therein into said second casing. a plu-' rality-of swinging vanes carried by said disk-like portion, said: vanes being equally 'and circumfe'rentially' spaced at each side of said disk-like portion and having free ends withconvex surfaces adapted to rotate'in engagement with the periphery of said cam members respectively, said second casing having equally and circumferentially spaced openings equal in number to the openings in each of said cam members leading to said discharge chamber, a valve disposed in each of said openings in said cam members and adapted to be oscillated for variably restricting said last mentioned openings ,*pivo't members secured to said valve members, arms secured to said pivot members. a ring at each end of said casing secured to saidqarms connected to the valve members of each cam member respectively, said rings being rotatable fo'r'swinging said arms, said rings having teeth formed; thereon, a pinion respectively meshing with the teeth on each of said rings, shafts-secured to' said pinions respectively and Journaledin said first mentioned casing and extending to the outer side-thereof and means secured tosaid last mentioned shafts respectively for turning the same and said pinions and rings 40 and operating said valves to vary the torque eifortof said pump.

.4. 'A pumphaving in combination, a casing, a shaft iournaled in and extending through said casing, a cam member surrounding said shaft and having a chambe'r'therein' adapted to receive fluid, a rotor in said casing secured to said shaft and comprising -a plurality; of swinging vanes carried thereon; each vane having a free end .v'vitha surface adapted to rotate in engage- 'ment with saidcam, said cammember having openings therethrough at-opposite sides thereof, a second casing closely surrounding said vanes and having circumferentially spaced discharge openings therethrough said second casing forming a-chamber about said cam member adapted to receive fluid through said openings in said cam member, said first mentioned casing having an outlet chamber extending about said second casing to form a discharge chamber adapted to receive fluid through said discharge openings and having an inlet chamber communicating with the chamber in said cammember, a valve member disposed in each of said openings through said cam member adapted to be oscillated for variably restricting said openings through said cam member, pivot members secured to said valve members, arms respectively secured to said pivot membars, a ring at the end of said casing secured to and said pinion, rotating said ring and operating said valves to vary the torque of said pump.

JOSEPH O. HAMIREN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date Wiechmann Dec. 30, 1902 Thomson July 7, 1903 Pratt Sept. 1, 1908 Hughes Jan. 11, 1910 Number Number France Nov. 26, 1923

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