US2468272A - Oscillating vaned piston pump - Google Patents

Description

April 26, 1949. BJPHILLIPS 2,468,272

OSCILLA'IING VANED PISTON PUMP Filed Dec. 12, 1945 w 2 Sh'efcs-Sheet l INVENTOR..

April 26, 1949. B. PHILLIPS OSCILLATING VANED PISTON PUMP 2 Sheets-Sheet 2 Filed Dec. 12, 1945 INVENTOR. W

Ar 7 wen 6x5 Patented Apr. 26, 1949 PATENT OFFICE 2;4ss,27e OSCITQLATING"VANE13PISIfiNPUMF Benjamin Phillips, CincifinatLQhio Amsifeet'ien Debifilil 12, 19 15',.s"e1=ia1Nis; 634345 l p-(amine (Cl. 103-145) 3 of the pump and showing the intake and outlet ports in relation to the port and baffle assembly.

Figure 3 is a sectional View taken on line 3-3 (Figure 2) showing the pump actuating member at the completion of the pumping stroke in one direction with the valves in appropriate positions.

Figure 4 is a sectional View taken on line 4-4 (Figure 2) showing the pump actuating element at the completion of the stroke in the opposite direction from that of Figure 3 with the valves in appropriate positions.

Figure 5 is an enlarged fragmentary sectional view of a portion of Figure 2 detailing the sealing ring in conjunction with the assembly ring for the pump body.

Figure 6 is a fragmentary enlarged sectional view taken from Figure 3 andillustrating the seal between the port and baffle assembly and the vane of the pump actuator.

Figure? is a view taken similar to Figure 6, i

but showing a modified type of seal.

Figure 8 is a developed view of one of the battle plates showing the valve ports and the ports connecting the respective chambers of the pump.

Described in general, the pump includes a fixed manifold coupling element, a port and battle assembly fixed with respect to the manifold coupling element, a pump casing surrounding the port and baffle assembly and, actuator means consisting of a drum and vane unit. This latter member also includes a handle for manipulation. The pump, as stated, is of the double-action oscillating type, the respective strokes of each oscillation being effective both for intake and delivery.

I Referring to the drawings, the manifold element is generally indicated at In and constitutes the fixed or base portion of the pump. This element includes an intake passageway H and an outlet passageway I2. The openings for these passageways are screw threaded internally adapt- -l' ing the same for attachment to the conduits which supply and deliver the liquid. These passageways enter the face or pump attachment side of the element perpendicularly thereto. The inner ends are also internally screw threaded.

,The pump casing l3, also fixed, is secured to the manifold element by means of tubular attachment elements [4. These elements include head portions l5 diametrically slotted for receiving a tool and externally screw threaded shank portions H5. The casing is cup-shaped and its bottom, or closure, wall l1 lies against the manifold element. The attachment elements |4l4 are engaged into the screw threaded inner ends of the passageways through apertures [8 in the wall I! of the casing. Sealing gasket elements l9 encircle the attachment members between the manifold element and the pump casing.

.The impeller, or actuator, members of the pump, indicated at 20, include a drum or cup member 2| and radially inwardly disposed vanes 22. This element is nested within the casing and its open end is disposed inwardly. Thus, a rotative bearing is provided between the impeller or pumping unit and the pump casing. As shown in Figure 2, the inner end of the cup-shaped member 2i engages the inner wall of the pump casing l3 and forms a metal to metal seal. This seal becomes more effective as use continues since the sliding contact surfaces are lapped into a more perfect sealing contact.

The pump casing includes an external flange. 23. A sealing ring 24 is providedand is attached to this flange 23 by means of bolts 25 and nuts 26, the bolts passing through the ring and the flange. The sealing ring includes an angular lip 21 overhanging the marginal edge of the flange 23 for centering the ring on the pump casing. The flange is of suflicient radial width to overhang the outer face of the impeller drum and includes an inwardly turned lip 28. The material at the intersection of the casing side wall and the fiange is pressed inwardly to form a clearance. Adjacent this, the material of the clamping ring is provided with a circular indentation 30 which tends to press a portion of the interposed ring gasket 3| into the clearance 29. Thus, the gasket is locked in position and upon tightening of the nuts 26 a seal is provided between the flange and the ring whereas the impeller drum is free to rotate in contact with the packing or ring gasket.

The impeller is actuated by means of a handle 32 which is of yoke form including a handle grip member 33 and attaching arms 34-34 straddling the manifold member and the pump impeller drum. These arms are concentrically attached. The attachment to the manifold element is rotative. For this purpose, a screw element 35 is threaded into the manifold element, the screw including a plain counter-turned portion 36, the shoulder of which abuts the manifold. This counter-turned portion loosely traverses an aperture in the arm. The other arm of the handle is fixed to the impeller drum over a square or irregular hub extension 31, the bore in the arm conforming to the shape of the hub. A washer 38 overhangs the margin of the arm about the aperture and is fixed to the hub by means of a nut and screw 39. Thus, the pump is oscillated by a swinging motion of the handle in strokes of limited length.

Referring again to the vanes 22, particularly Figures 3 and 4, it will be noted that these vanes are made up of identically formed plates or sheet metal members 40. Inasmuch as the vanes are duplicates, the description will be limited to one. Each sheet metal or plate section is formed to provide a radially disposed portion 4|, a circumferentially disposed outer attaching flange 42 and an inner seal mounting and stop element at the inner end constituted by a specially formed flange 43. This flange includes a portion turned at right angles to the body of the plate element 4| and a continuation inwardly parallel to the body portion and, finally, a circumferentially turned slotted portion, the end of which constitutes the stop 44 for limiting the oscillatory motion of the impeller.

Thus, it will be seen that when these correspondingly formed plates are assembled face to face with the flanges extending oppositely, a seal receiving groove is formed parallel with the axis of rotation of the impeller. The sealing element, of which two forms have been disclosed, adapted to fit in this longitudinal groove, will be fully described in connection with the relationship of the impeller to the port and baflle assembly.

The port and baffle assembly is also fixed with respect to the manifold and the pump casing, although it is a removable assembly easily placed in position and easily removed in the event of difficulty with the valves or seals. Just as in the case of the vanes, this assembly indicated at 45 is made up of identically. formed plate sections which are indicated at 46-46. Each of the plate sections 46 is originally, while in flat condition, punched out to provide ports 41 and 48.and valve openings 49 and 50 (see Figure 8). Likewise, tapped holes 5| are provided at the ,mectiye @ndsrcfdihewalve'openinas dntomhich ehelesithe valve mouritlngzstudsz-zi! areisecuued.

After all these-openings are formed, the plate {element is pressed :to a iprescriboed shape. The imtemnediate or central portion :pressed to a semiscircular scented-r153. seatlea-ch side :of "this central portion .the'zmetallextends outwardly to provide radially disposed faces which abut llflgure 13') when the elements are assembled. raeaondxthese diat :rad-ial sections 5! the-metal is turned. outwardly .at rightcangles to pmvideoflat a'alve seatingspoiitions or lands-ital; the amas o'f atheqyalcelopenings. Erom 't-heserlandsthe-metal .dsadormed irregularly hut generallytarouaterso as to 'encircle thenheads cl 5 40f the attaching :mem-

tubular portion .Jof the vballle, that is, the upper one in the drawings-the -valvesare-internally located. The :valvesiindicated at 51-oonsist-=metely of elongated plate -members resting by gravity uponthe :marginslo'f the valve openings. whey ailemeld :againstdisplacement by :means of the attaching studs 252, there being appropriate clearance :hetween :the heads of the studs and-the lands tospermit opening. the case of the intake halves 58,:thelowerones in the-drawings, these are externally located and a-re identical in strucllulle-stozthose of the-outlet.

HZ-he cylindrical l'centnal portion of the port and ballle assembly is divided'by a septum 59 disposedldiametrically, intermediate 'of the length or the central portion. 'llh-is septum includes-an attachingrflange 259a weldedto the-internal wall of the cylindrical portion. Thus, the ;-ports, til-4:1 connect across :one en-d 'of the cylindrical portion and-theports 118-48 across the other end.

it will lbeobsenved that the spaces hothnsides of the lpump chamber arebe'ing 'filled and, discharged at the same time aseach stroke is performed. l hislwill he made clear at-a 18156! point in :a description of the pumping operation.

=:Sea1ing.:between thev stationary port and ballle assembly and thedrum ran-d vane assembly-is accomplished by :means of thin sheet metalelements, preferably rol -phosphor bronze -or the like. In stile case of the seals between the vanes and the central limb ot'the :hatlle,-these members :eonsist lof longitudinal urs'haped elements :60, the body of which :iits .rthe longitudinal slots and thearms of winch .spreadlout laterally beyond the wane where th y a pr vided With'cufis m in spring engagement with the =ci=rcular hub of thehaflle. 'll-he sealing-elements:fiz-aei between the router lendslofthe baflle :and inner wall of the .zazre ,lOf somewhat the :same shape "except thatuthe arms are more extended land thereiore have greater sprineiness. :Asshownindigunefl, the thin ,sheet metal sealin elements mail he naelaeedyby rubber sealing ibmks $3.

,i eseribing the operation of the pump, it poin ed, out bilatjmu'll .13 'showss- I impeller i843 theammpletion ema gleli-meryintake stroke rim-one direc'tiomsthat isato sayg-thestopsifl of the imrpell-er haveaengaged-ithe bafile :and the intake and voutletvalves are stillsopen. lAS the impelleris rotated nounteracloclcwisedrom mhe-pos'ition as it appears in this wiew, alternate valves will open; that ls ito:-say,- -the valves-at the right hand side of the view both cintahe'and outlet, will open. YEihisithen -constitutestthe chambers just ahead :of :thewanes as theldischarge chambers. Since the left hand lower intake waive then closes and the zupper rightqhamd outlet valve opens, it is obvious "that ithe liquid-wfll be evacuated-ahead of both vanesandwiilube adelivered out throughlthe outlet I 2. At thessame time, the will be draw-n in through theinlet'throughthe open lower right hand intake walue andwill :pass' into both areas hack ofJthe-wanesdilling them up for the next :stroke. Completion of this stroke is shown in Figured where 'thestops of -the "vanes have again come :torest @againetz the baflle. "I hus, the pump is-ful'ly chargedon each-stroke and-is immediately ready for the .-returnmovement of the oscillation.

:It will be noted-that as thewanes :move in the direction .shown in ll lig-ure' 3, the pumped fluid passes from the lower chamberthroug-h the ports 141-41 diametrically of the tubular hub portion 53 to 'thewupper chamber and -thence into the upper tubular outer discharge portion and out through the outlet passage 1 2. While this *is occurring, the"fluidis beingdrawn in from the inlet 1Y5 into thelower left hand chamber and then through ports -fl-48 diametrically through the tubular hub portion 53 "tofill the "upper right hand. chamber. When'the "rotation is reversed, although thefiuidpasses in the same direction through the ports ll-"4 'and 4'848, the chambers (considerin -thespaces on the opposite sides of thevanes-as variable chambers) reverse as to C intake and discharge-functions.

It willbe-observedthat all-the elements of the pump, with-theexception of the manifold, are pressed-orstamped elements. The sealing of the pump is greatly simplified due to the fact that the-ports are contained in the baflle which is stationary and the vane and drum elements making up the impeller are'movable. "This latter assembly is easily re'movably nested within the pump casing. The-fixed port and ballle unit is assembled merely ibyslipping it inand out of position in relation ;to the fixed manifold and pump casing.

Having described my invention, I claim:

'1. -A pump comprising; a stationary manifold element includin inlet and outlet openings, a cup-shapedpump casing'fixed in relation to said manifold element, a-baille and port unit fixed in relation to said manifold element and said pump casing, an actuator including a cup-shaped member nested within thepump casing with its open end disposed inwardly,v saidcup-shaped member including diametrically disposed vanes in ,a plane bisecting the plane of said port and baffle unit and providingrespective pairs of fluid displacement chambers, said port and baflle unit including a pair of passageways connecting alternate displacement'chambers "in common, and respective check valves controllin g'fiow of fiuid relative to each of 'saiddisplacement chambers, said check valves communicating in pairs with the respectiveinlet andoutlet openings, one of said checkvalves being arranged to permit passage of -fiuid outwardly nndthe other permitting intake of fluid, -means "for actuating said cupshapedmember-i-n alternate directions, and said respective sets of alternate displacement chambers operating alternately in common as intake and discharge chambers as said cup-shaped member is actuated in alternate directions.

2. A pump comprising; a stationary manifold element including inlet and outlet openings, a cup-shaped pump casing fixed in relation to said manifold element, a bafile and port unit fixed in relation to said manifold element and said pump casing, an actuator including a cup-shaped member nested within the pump casing with its open end disposed inwardly, said cup-shaped member including diametricallydisposed vanes in a, plane bisectin the plane of said port and bailie unit and providing respective pairs of fluid displacement chambers, means for oscillating said cup-shaped member and vanes, means for sealing the. vanes in relation to the port and bailie unit, ports in said port and baffle unit connecting alternate displacement chambers in common, a sealing ring secured to the pump casing and overlying the outer wall of the cup-shaped member, and respective intake and outlet valves controlling flow of fluid relative to said displacement chambers and said respective inlet and outlet openings.

3. A fluid pump comprising; a pump casing, a double wall bafile disposed diametrically within said pump casing and providing a pair of fluid chambers, impeller vanes disposed diametrically within the pump casing in sealed oscillatory contact with said pump casing and with the central portion of the bafile, said battle and vanes respectively formed of double plates welded together, means for oscillating the vanes on the axis of the pump casing, said double wall baflle and pump casing defining a pair of fluid chambers, each of said chambers being divided into respective sets of displacement chambers by said diametrically disposed vanes, said double wall bafiie including a pair of passageways connecting alternate displacement chambers in common, respective check valves controlling the flow of fluid relative to each of said displacement chambers, said check valves arranged in pairs relative to respective inlet and outlet passageways, one of said pairs of check valves being arranged to permit discharge of fluid and the other pair permitting intake of fluid, and said respective pairs of alternate displacement chambers operating alternatively in common as simultaneous intake and discharge chambers as said impeller vanes are actuated in alternate directions.

4. In a pump having an inlet and outlet, a port and battle unit mounted in fixed relationship to the inlet and outlet, a cylindrical pump casin disposed about said port and bafile unit with th port and bafile unit disposed diametrically within the casing to provide a pair of fluid chambers, a cup-shaped member including a vane assembly mounted for oscillation on the axis of said pump casing with the plane of the vane assembly bisecting the plane of said port and baffle unit and providing respective pairs of fluid displacement chambers, said pump casing being cup-shaped and nested with said cupshaped member with their open ends extended inwardly, means for oscillating said assembly, said baiile unit including tubular portions ex-v tended parallel with the pump axis, valve means connecting the displacement chambers at either side of the bafiie unit with said tubular portions of said baflie unit, respective tubular portions of said baiile unit being in communication with the inlet and outlet respectively for intake and discharge of fluid when the vane assembly is moved within the chambers at either side of the baflie,

and a pair of ports through said port and bafli'e unit communicating with alternate displacement chambers to permit intake and discharge of fluid simultaneously from respective pairs of displacement chambers through said tubular portions and valves to said inlet and outlet.

5. In a pump, a stationary manifold member including inlet and outlet openings, a cup-shaped casing fixed in relation to said member, a port and bafiie unit fixed in relation to said manifold member diametric to said casing and defining a pair of fluid chambers, an actuator comprising a cup-shaped member nested within the pump casing with its open end disposed inwardly, said actuator including diametrically disposed vanes secured thereto, said vanes subdividing said fluid chambers into sets of displacement chambers, means for oscillating said cup-shaped member and vanes, means for sealing the vanes in relation to the port and baflle unit, said port and bafile unit including a cylindrical hub portion coaxial with the axis of the pump casing and hav ing passageways connecting alternate displace ment chambers in common, tubular portions at the outer ends of the port and baiile unit parallel with said axis and in communication with said inlet and outlet openings respectively, and respective check valves in said tubular portions for controlling the intake and discharge of liquid respectively through said openings.

6. In a pump, a baffle element consisting of a pair of sheet metal plates of duplicate form, said plates welded together to provide a cylindrical hub portion and tubular portions at the outer ends of the baflle parallel to said hub portion, a pump casing surroundin said bafiie with the 'baflle disposed diametrically across said casing, defining a pair of fluid chambers, the casing having its axis coinciding with the axis of the hub of the bafiie, respective intake and discharge valves located in respective tubular portions, said hub portion including a partition centrally thereof at right angles to the axis, ports at each side of the partition providing for flow of liquid diametrically through the hub at either side of the partition, said valves controlling the flow of liquid in the spaces at either side of the baffle to and from the respective outer tubular portions, inlet and outlet conduits in communication with the respective outer tubular portions, impeller vanes disposed radially with respect to the said hub portion, said vanes dividing said fluid chambers into respective displacement chambers connected alternately in common through said ports, and means for oscillating the vanes on the axis of the hub for intake and discharge of liquid through the bafiie and through said valves.

'7. In a pump, a bafile element having a cylindrical hub portion and tubular portions at the outer ends of the baiile, a pump casing surrounding said baffle, said baffle extending diametrically with respect to said casing and defining a pair of fluid chambers, said hub portion including a partition centrally thereof at right angles to the axis, ports at each side of the partition providing for a flow of liquid diametrically through the hub at either side of the partition, respective intake and outlet valves in said tubular portions, said valves adapted for controlling the flow of liquid in the chambers at either side of the baflle to and from the respective outer tubular portions, inlet and outlet conduits in communication with the respective outer tubular portions, impeller vanes disposed radially with respect to the hub portion in a plane bisecting; the plane of said baiile comprising plates welded together and formed to provide slots along the inner edges of said vanes, seals in said slots engaging said hub, and means for oscillating the vanes on the axis the hub for intake and discharge of liquid through the baffie and through said valves. 7

8. In a pump, a'bafile providing a cylindrical hub and tubular outer portions disposed in parallelism with the hub, a pump casing surrounding said baflie with the baffie disposed diametrically thereto, said baflle defining a pair of fluid chambers, ports for controlling the flow of liquid from the chambers at either side of the baflle through the hub portion, impeller vanes disposed radially with respect to the hub portion in a plane bisecting the plane of said baflle to divide said fluid chambers into respective displacement chambers, said vanes formed of pairs of plates Welded together in face to face contact, the inner ends of the plates spaced to provide slots for sealing members, sealing members in said slots engaging the tubular hub portion, said sealing members consisting of U-shaped flexible sheet metal members having outer arms in spring contact with the hub portion, intake and outlet means in communication with the respective outer tubular portions of the battle, check valves in said tubular portions communicating respectively with said displacement chambers, and means for oscillating the vanes on the axis of the tubular hub portion.

9. In a pump, a baflle providing a cylindrical hub portion and tubular outer portions disposed in parallelism with the hub, a circular pump casing surrounding said baflle, with the baflle disposed diametrically thereto, said baffle defining a pair of fluid chambers, ports in said hub portion for providing a flow of liquid from the chambers at either side of the baflie through the hub portion, impeller vanes disposed radially with respect to the hub portion and in oscillatory sealing contact therewith, said vanes disposed in a plane bisecting the plane of said baflie to divide said fluid chambers into respective pairs of displacement chambers, said vanes formed of pairs of plates welded together, the inner ends of the plates formed to provide slots for sealing members, sealing members in said slots engaging the tubular hub portion, intake and outlet means in communication with the respective outer tubular portions of the bafile, check valves in said tubular portions communicating respectively with said displacement chambers, and means for oscillating the vanes on the axis of the tubular hub portion.

10. In a pump, a bafile element having a cylindrical hub portion and tubular portions at the outer ends of the baflle, a pump casing surrounding said baffie and having its axis coinciding with the axis of the hub of the bafile providing a pair of fluid chambers, said hub portion including a partition centrally thereof, ports at each side of the partition providing for flow of liquid diametrically through the hub at either side of the partition, valves controlling the flow of liquid from the chambers at either side of the baffle to and from the outer tubular portions, inlet and outlet conduits in communication with the respective outer tubular portions, and impeller vanes bisecting the plane of said baflle element and defining respective displacement chambers for causing intake and discharge of liquid through the baflle.

11. In a pump, a baiile consisting of a pair of sheet metal plates welded together to provide a cylindrical hub portion and tubular outer portions disposed in parallelism with the hub, a cir- 10 cular pump casing having its axis disposed on the axis of said hub portion andsurrounding said bafiie, said bafile being diametrically disposed with respect to said casing providing a pair of fluid fchambers, means for controlling the flow of liquid to and from the chambers at either side of the baflle through the hub portion and into and out of respective outer tubular portions, impeller vanes disposed radially with respect to the hub portion and in oscillatory sealing contact therewith in a plane bisecting the plane of said b'aiile and defining respective pairs of fluid displacement chambers, said vanes formed of pairs of plates welded together in face to face contact, intake and outlet means in communication with the respective outer tubular portions of the baffle, and means for oscillating the vanes on the axis of the hub portion.

12. In a pump, a pump casing, a double wall bafiie disposed diametrically within the pump casing and defining a pair of fluid chambers, said baflie providing passageways for the flow of liquid from one fluid chamber to the other, and including tubular portions having valves for receiving and discharging liquid endwise therefrom, intake and outlet means connected to the respective tubular portions, impeller vanes disposed diametrically within the pump casing in a plane bisecting the plane of said baffle and providing respective pairs of fluid displacement chambers and in sealed oscillatory contact with the pump casing and with the central portion of the bafile, said baffle and vanes respectively formed of duplicate plates welded together, and means for oscillating the vanes on the axis of the pump casing.

13. A pump comprising; a cup-shaped member mounted for oscillatory movement in a stationary casing, a stationary baffle structure extending diametrically across the inside of said cupshaped member and defining a pair of fluid chambers therein, said bafile including a cylindrical hub portion with a partition therein disposed at right angles to the axis of the hub, diametrically disposed ports in the hub connecting said fluid chambers through the hub on each side of said partition, said baffle also having a pair of outer tubular portions disposed on either side of said hub and parallel thereto, one of said tubular portions having a valve controlled port opening into the interior of the tubular portion from each of said fluid chambers, the other tubular portion having a valve control port opening from the interior of the tubular portion into each of said fluid chambers, impeller vanes extending radially with respect to said hub and diametrical with respect to said cup-shaped member in a plane bisecting the plane of said baffle to provide respective pairs of fluid displacement chambers, said vanes fixed to said cup-shaped member at the outer ends and adapted for oscillatory engagement with said hub at their inner ends, and means for oscillating said vanes for displacing liquid relative to said baffle.

14. In a pump, a cup-shaped casing, a cupshaped impeller element nested within said casing with its open end edge sealingly engaged against the closure wall of the casing, a fixed double wall structure disposed diametrically within said impeller element defining a pair of fluid chambers therein, said structure including inlet and delivery valve means for delivering liquid into said fluid chambers endwise thereof at one side of the center thereof and discharging it endwise at the other side of the center, said impeller element including vanes radially disposed 12 REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name- Date Waldkircher Apr. 3, 1888

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