US1633720A - Pump - Google Patents

Description

, June 28, 1927. 1,633,720

l. H. WILSEY PUMP Filed Aug. 24. 1925 2 Sheets-Sheet 1 l. H. WILSEY June 28, 1927.

PUMP

Filed Aug. 24. 1925 2 sheets-sheet 2 fraz/@wr Patented J unel 28, 1927.

UNITED STATES y 1,633,720 PATENT OFFICE. l

II'WEN n. wrLsaY, or cmcmo, ILLINOIS, AssIGNon 'ro .1. 1i. rumana., or omesso,

. ILLINOIS.

alipucamn mea mgm 24, 11125. amai 11. 51,917;

The invention relates to improvements in rotary pumps for transmitting oil and other liquids.

An important ob'ect of the invention 1s to provide a new an improved pumfp which is 'adjustable to vary the-How o liquid, thereby dispensing with the 'usual by-pass means employed for this pupose, and saving the power expended inhandling the lliquid i that is ordinarily by-passed.

Another object is to provide a pump of the above character which is adjustable to reverse the direction of iow and to vary the flow in eitherdirection.

vA further object is to rovide a pump which serves to meter the ow of the liquid therethrough, thereby dispensing with the usual orifices required for this purpose.

Another object is to provide ay pump of the above character having no valves, such as check valves, thereby .requiring power only to pump the oil.

A further object resides in the provision of a novel pump which is adjustableso. as not to pump any liquid although operating at full speed', thereby permitting starting of the pump under no load conditions.

Another object is to provide a new and improved pump which can be used as an engine. p

A further object is to provide a novel pump' which is simple andinexpensive in construction, and which is eiiicient 1n operation over a wide range, particularly at partial loads since no part of t-he liquid is bypassed. l

Further objects and advantages will be become apparent as the description oceeds.

In the accompanying drawings, igure 1 is a sectional view of a pump embodying the features of my invention taken along line 1-1 of Fig. 2. y

Fig. 2 is a sectional view of the pump taken along line 2-2 of Figure 1.

Fig. 3 is a sectional view taken along hne 3-3 of Fig. 2.

Fig. 4 is a sectional view of the pump taken along line 4 4 of Fig. 3.

While the invention is susceptible of various modifications and alternative constructions, I have shown in the drawings and will herein describe in detail the preferred embodiment, but it is to be understood that I do not thereby intend to limit the inven- 55 tion to the specific form disclosed butaim tocover all modifications and alternative constructions falling within the spirit and scope of the invention as expressed 1n the appended claims. v Referring more particularly to the drawings, the pump comprises a casing 3 which 1n the present instance is circular in form and which is provided with an annular flange 4. The casing 3 is formed with a central elongated bearing 5 in the outer end of which a packing 6 is held in position'by a threaded. nut 7. Fitting over the flange 4 and serving to close the casing 3 is a cover 8 which in the present instance is also circular 1n form and which is secured tothe casing by means of a. plurality of spaced bolts 9. Y

Extending through the bearin 5 is ,a shaft 1.0 which.- is adapted to be driven by any suitable source of powerl(notvshown), and which is formed inside the casing 3 with a circular rotor 11. The casing 3 is formed in opposite sides of its inner periphery with opposed recesses separated at the top and bottom by inward projections 12 and 13. These recesses are closed by the rotor 11 to form chambers 14 and 15. The inner surfaces of the projections 12 and 13 are ma# chined, and fit closely against the peripheral surface of the rotor 11. Passages 16 and 17 formed in the top wall of the casing 3 open respectivel into the chambers 14 and 15 at opposite sides of the projection 12.

he rotor 11 is formed in its surface next to the cover 8 with a cylindrical recess or chamber 18 concentric with the shaft 10, and with a plurality of 'equally spaced radial bores 19 opening into said recess and at the outer periphery. of the rotor. A plurality of plungers 20 are slidably mounted in the bores 19.

Formed on the outer surface of the cover 8 and positioned eccentrically with respect to theshaft 10 is a bearing 21 having a acking 22 secured in place in its outer end y a land nut 23. A shaft 24 extends throng the bearing 21, and is formed on its inner end with a circular late or eccentric 25 fitting into a cylindrica recess 26 on the inner surface of the cover 8. A in 27 is formed on the inner face of the plate 25 eccentrically of the shaft 24, and extends into the recess 18 in which it is adapted to be adjusted in a curved but substantially' vertical path by acuating the shaft. .The

pin 27 carries a bushing 28 on which is mounted a ring 29. The ring 29 is formed with inner and outer spaced annular ilanges 3() and 31 respectively, of which the inner flange bears against the inner ends of'the plungers 2O and the outer lanve. lits into lateral notches 32 cut in the sides of the inner ends of the plungers. The inner ends of the plungers and the edges of .the slots 32 are curved to prevent binding in movement about the ring 29 as the rotor 1 1 is operated. The ring 29 is substantially smaller in diameter than the recess 18, and can be adjusted substantially in a line between the projections 12 and 13 into positions eccentric thereto by angularly adjusting the eccentric 25.

In operation, when the ring 29 is in its uppermost'po'sition, each plunger 20 will be in its outermost position when ciossing the projection 12, and in its innermost" position when crossing the projection 13. Assuming that the rotor 11 is moving clockwise, a's the plungers are moved downwardly, they are gradually drawn inwardly by the flange 3 1 of the ring 29 because of its eccentric position with respect to the shaft 10. The suction created by the inward movement of the plungers 20 draws liquid through the passage 17 into the chamber 15 and into the outer ends of the bores 19. As each bore is moved over the projection 13, the outer end is cut olf from the chamber 15 and theliquid therein is entrapped. As the plungers are moved upwardly on the lett side of the casing, as viewed in Fig. 1, the Hange 31 gradually forces the plungers outwardly, thereby ejecting the liquid which was'entrapped in the bores 19 into the chamber 14 from which it is discharged through the passage 16. Y j,

It they shaft 410 is rotated in a counter clockwise direction, the low through the pump will be reversed, i. e. the liquid will be drawn in through the passage 16 and discharged from the'passage 17. Ifthe rinorr is adjusted into a position below the shaft?J 10 and the rotor is driven in a clockwise direction, the direction of flow will also be reversed. In practice, the rotor is driven in one direction, and a reversal of flow is obtained by adjusting the eccentric 25 to yshift the ring 29 from a position on one from, that the pump therefore serves to meter the liquid, and that since there are no valves the only power required to drive the pump is4 that required to propel the liquid and to overcome friction. The pump is well balanced, and .eilicient in operation over a wide range. It can be started under no-load conditions after adjusting therring 29 into axial alinement with the shaft 10.

I claim as my invention:

1. A pump having, in combination, a hollow casing, a rotor in said casing, said rotor having a central cylindrical chamber and having a plurality of radial bores opening into said chambersaid casing having a pair of diametrically opposed projections bearing against said rotor and dividing the space between said casing and said rotor into chambers at opposite sides of said rotor, inlet and outlet passages communicating with said last mentioned chambers, a plurality of plungers slidably mounted in said bores, each plunger having a lateral notch onfits inner end, and adjustable cam means positioned/iii said first mentioned chamber and engaging in said notches to actuate said plungers upon rotation of said rotor, said cam means being adjustable-between said projections relative to the axis of rotation of said rotor to vary the throw of said plungers and thereby vary the ilow of liquidthrough said pump.

2. A pump having, in combination, a hollow casing, a rotor in said casing, said casing having a pair of opposed chambers at opposite sides of said rotor, inlet and outlet passages communicating respectively With said chambers, said rotor having a plurality of radial bores, a plurality of plungers, one mounted in each bore, means engaging said plungers, said means being adapted to be positioned eccentrically of said rotor so as to effect a reciprocation of said plungers upon operation of said rotor, and means for adjusting said last mentioned means to change the eccentricity of the latter relative vto the rotor.

3. A pump having, in combination, a hollow casing, a rotor in said casing, said casing having a pair of opposed chambers formed at opposite sides of said rotor and having inlet and outlet passages communieating with said chambers, said rotor having a plurality of radial bores, a plurality of plungers one mounted in each bore, and means engaging the inner ends of said plungers, said means being adjustable into and out of axial alinement with said rotor, and being operative when out of alinement to reciprocate said plungers as said rotor is operated. Y

4. A pump having, in combination, a hollow casing having inlet and exhaust passages, a rotor in said casing, said rotor having a plurality of bores extending perpendicularly to the axis of rotation and adapted to be moved into successive communication with said passage, plungers in said bores, cam means mounted in said casing and operatively associated with said plunger's, sald cam means being adjustable into axial alinement with said rotor, in which position it is inelfectual to actuate said plungers, and into eccentric positions on opposite sides of said last mentioned position to reciprocate said plungers in opposite directions respectively upon rotation of said rotor, the length of reciprocation in either direction being determined by the degree of eccentricity.

5. A ump having, in combination, a hollow casing, inlet and exhaust passages, a rotor in said casing having chambers movable into successive communication with said passages, plungers reciprocable in said chambers, means engaging said plungers and being adaptedto reciprocate the latter, said means being adjustable perpendicularly` to the axis of rotation of said plungers to adjust the extent of reciprocatlon and the direction of reciprocation of said plungers relative to said passages.

6. A pump having, in combination, a hollow casing, a rotor 1n said casing, said rotor having a central chamber, and having a plurality of radial bores opening from said chamber to the periphery, 'said casing having a pair of diametrically opposed projections bearin against the periphery of said rotor and ividing said casing into two chambers, inlet and outlet passages communicating respectively with said chambers, a plurality of plungers slidably mounted in sald bores, each plunger havlng a lateral notch on one vside of its inner end, the sides of said notches being convex in shape, and each plunger having its inner end rounded, a slate mounted in the inner face of one en wall of the casing for rotary adjustment about an axis eccentric to that of said rotor, a pin extending eccentrically from said IRVEN H. WILSEY.

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