USRE19772E

USRE19772E - Rotary pump or motor

Info

Publication number: USRE19772E
Authority: US
Publication date: 1935-12-03

Description

. 3, 1935. E. R. DUDLEY ROTARY PUMP 0R MOTOR- Original Filed April 1.

1930 3 Sheets-Sheet 1 v n mam m m W m m J m a W m s w M.

Dec. 3, 1935. E. R, DUDLEY ROTARY PUMP on mo'ron Original Filed April 1 1930 3 Sheets$heet 3 INVENTOR, EOMOND R DUDLEY ATTORNEYS.

Reissued n... a, 1935 UNITED STATES PATENT OFFICE many PUMP on no'roa Edmond a. Dudley, Altadena, Calif. Original No. 1.889.053. am July so, 1932, Serial No. 440,796, April 1, 1930. Application for relsalle Ill! 23, 1934- Serial No. 736,619

My invention relates to and has for a purpose the provision of a rotary pump or motor which in one of its uses can be driven from a suitable source of power to eifect the pumping of fluids with maximum efliciency, and in another use will function as a prime mover of highefliciency by supplying fluid under pressure thereto.

The invention is particularly directed to the class of rotary machines wherein use is made of a stator and a concentric rotor, the latter having rotary abutments eccentrically of and parallel to the axis of the rotor, and the former having abutments extending into the working chamber of the stator and co-acting with the rotary abutments to effectively induce suction in the chamber and thereby draw the fluid thereinto where it will be compressed between a stator abutment and a rotary abutment, then discharged under pressure from said chamber. It is an important object of the invention to provide a rotary mahine of this type wherein means are employed to positively prevent leakage at the lines of contact of the rotary abutments with the stator wall and at the line of contact of a rotary abutment with a co-operable stator abutment and to constantly employ a plurality of rotary abutments which will function to elect a continuous pumping of the fluid, during which operation one stator abutment and one rotary abutment and all the 80 remaining rotary abutments and the stator will positively function to prevent the by-passing of fluid from an intake port to a discharge port of the stator, thereby enabling the machine to be economically and effectively used to compress to a relatively high degree of compression the fluid being acted upon.

A further object is to provide a novel construction of sealing means for the stator abutments which is movable radially of the axis of the rotor and which is co-operable at one time with the roary abutment to positively close 011 communication between an intake port and an adjacent discharge port and which, at another time, co-acts with the peripheral surface of the rotor to form a fluid seal at theline between said surface and said means to prevent fluid losses during discharge of the compressed fluid through the discharge ports of the stator.

A further object is to provide sealing means at the stator abutments which can be adjusted radially to increase the sealing eflect thereof as may be required to compensate for wear upon the surfaces in the ordinary operation of the machine.

6 It is a further purpose of my invention to provide a device of the above described character which will eilectively pump liquids containing sand and other foreign particles such as is found in oil and water wells, all without clogging or damage by such foreign matter in the fluid be- 5 ing pumped.

I will describe only one form of rotary pump or motor embodying my invention and will then point out the novel features thereof in claims.

In the accompanying drawings, 1

Figure 1 is a view showing in vertical longitudinal section one form of rotary pump or motor embodying my invention;

Figure 2 is a transverse sectional view taken on the line 2-2 of Figure 1 and lookingin the15 direction of the arrows;

Figures 3 and 4 are transverse sectional views on a reduced scale, taken, respectively, on the lines 3-3 and 4-4 of Figure 1 and looking in the directions-of the respective arrows; 20

Figure 5 is a fragmentary sectional view taken on the line 8-5 of Figure 2 and looking in the direction of the arrows.

Referring specifically to the drawings, in which similar reference characters designate similar 25- partsin each of the several views, my invention, in its present embodiment, comprises a stator S constructed of metal to provide a central and open ended cylindrical section II, and circular end sections II and ii closing the open ends of so the central sections and secured'thereto in any suitable manner. The end sections Ii and ii are provided axially with bearings i3 and II, respectively, in which is journaled a shaft II. The shaft l5 projects exteriorly of the section I2, 35 through a suitable stufling box I! provided on the section I! so asto form a fluid tight seal around the shaft, preventing the escape of pressure from within the stator.

Fixedtotheshaft libyakey llisarotorR40 in the form of a cylinder, reduced in diameter between its ends as indicated at II to co-act with the stator S in defining a continuous annular passage is between the stator and rotor.

The end portions of the rotor are slightly less 45 in diameter than the internal diameter of the central section iii of the stator, and interposed between such portions of the rotor and the central section are metallic liners "-20, the confronting edges of which are rabbeted as indicated 50 at Il-Il to receive the edges of and clamp a liner 22 oi yieldable material such as resilent rubber, against displacement from the inner periphery of the central section II. The liner 2! thus forms the outer peripheral wall of the pasafter described.

Supported from the central section Iii oi the stator S are stator abutments A, and in the present instance three such abutments are shown and are radially disposed at equally spaced intervals circumi'ercntially oi the stator. The abutments A are all identical in construction and each comprises a rectangular plate 23 projecting through registering slots in the central section III and liner 22, into the passage I9 so as to span the latter transversely. Each abutment A is provided with lateral flanges 24 seating in a recem 25 formed in the central section It, and secured to the latter by bolts 26 so that the abutments will be rigidly supported in fixed positions in the stator. The plate 23 oi each abutment A is slotted from its innermost edge to slidably receive a yieldable packing member 21 of resilient rubber, and a metal pressure bar 28 which abuts the member and is engaged by screws 29. The screws 2! are threaded into the abutment and are operable when rotated to force the packing member radially inward into engagement with the periphery of the rotor R in the passage l9 and thus form a fluid tight seal.

For co-action with the stator abutments A I provide a plurality oi rotor abutments A of which four are shown in the present instance. The rotor abutments are rotatably mounted in the rotor R, eccentrically of and parallel to the axis of the rotor at equally spaced intervals circumierentially.

The rotor abutments A are identical in construction and each comprises a cylindrical bochr reduced in diameter at its ends to provide journals Ill and 3| rotatably mounted in bearings 22-32 in the rotor so that the body projects into and spans the passage I9 and has rolling contact with the yieldable liner 22, which latter functions as a result of its yieldability, to provide a fluid tight seal between the rotor abutments and the stator during rotation of the rotor.

Fixed to the extremity of the journal 30 of each rotor abutment A is a gear 33 constantly meshing with an internal ring gear 34 flxed to the central section In of the stator so that during rotation of the rotor, the rotor abutments will be rotated and thus planet about the axis of the rotor.

In order to enable the rotor abutments to pass the stator abutments during rotation of the rotor, the body of each rotor abutment is provided with a recess into which the stator abutments are received in successive order, due to the timed relationship between the rotational movement or the rotor and the combined rotational and planeting movements oi the rotor abutments. It will be noted that the periphery oi the body of each rotor abutment A is provided with grooves 36 extending longitudinally of the body and coacting with the rotor and with the liner 22 to form pockets for receiving and conveying through the passage l9 any solid particles or other foreign matter such as sand, so as to prevent clogging of and possible damage to the device.

For each stator abutment A, and inlet 21 and an outlet 28 is provided in the stator so as to communicate with the passage I! at opposite sides 01' the stator abutment and thus be separated by the latter. The inlets 21 are connected to a main inlet pipe 39 by means of an arcuate branch pipe 40, whereas the outlets 28 are connected to a main outlet pipe 4| by a branch pipe 42 also of arcuate form.

An oil i'eed pipe 43 leading from a source of oil 'sage l9, and functions in a manner to be hereinsupply under pressure (not shown) is connected to the end section ll of the stator S and communicates through a duct 44 with a chamber 4| in the stator so as to provide lubrication for the

gears

22 and 34. A water ieed pipe 46 is con- 5 nected to the end section I2 oi the stator and communicates through a duct 41 with a chamber 48 in the stator at one end or the rotor. and a second water feed pipe 49 is connected to the central section ill of the stator and communi- 1 cates through a duct 50 with the periphery oi the rotor adjacent its opposite end. During the operation of the device, water or other fluid under pressure from a suitable source of supply (not shown) is supplied to the

pipes

46 and 49 15 and sets up counter pressure in the stator at opposite sides of the pasage J9, sufficient to conflne any fluid in the passage against escape therefrom between the rotor and stator, thus preventing any loss of pressure developed by the device 20 during its operation.

In the use of my invention as a pump, its operation is as follows:

With the rotor R driven in the direction of the arrow in Figure 2, the rotor abutments A will be 25 driven by the gears 33 and will be rotated in the directions of their respective arrows, as shown in this figure. As each rotor abutment'passes one of the inlets 31, it will co-act with the respective stator abutment A to induce suction in the passage 30 it between the rotor abutment and the stator abutment, so that with the main inlet pipe 39 connected to a source of fluid to be pumped, fluid will be drawninto the passage in the rear of each rotor abutment. Furthermore, pressure'will be 35 set up in the passage l9 between each rotor abutment and the particular stator abutment immediately in advance thereof, so that as operation of the rotor continues, the fluid drawn into the passage l9 by any one'rotor abutment will be ad- 40 vanced in the passage by the next succeeding rotor abutment and forced through one of the outlets 38 to the main outlet pipe 4|.

By the provision of three stator abutments and tour rotor abutments as shown, a continuous 45 pumping of the fluid will be effected, as three of the four rotor abutments are at all times active to pump the fluid. On reference to Figure 2 of. the drawings, it will be noted that the rotary abutment A at the top has its recess 35 confronting the 50 yieldable liner 22 and that the inner edge 01 the packing member 21 is in fluid sealed contact with the inner wall of said recess, thus positively preventing the by-passing of fluid from the intake 31 to the outlet 38. All the remaining rotary abut- 65 ments are in rolling contact with. the yieldable liner 22. The lower packing members 21 are in fluid sealed contact with the peripheral wall or the rotor R. It follows therefrom that the fluid will be effectively compressed against the next 6 adjacent stator abutment without any possibility oi leakage at any of the contact lines, and'that the pump will, therefore, operate at a high rate 01' efllciency, there being no pressure losses at any of the contact lines between either the rotary 65 abutments and the armular wall of the stator or between the periphery of the rotor and the packing members 21 or between any rotary abutment and its co-acting packing member 01 the stator abutment. I lay particular stress upon the use in a 10 machine of this type of an equal number at rotary abutments A and an unequal number of stator abutments, the latter equi-distantly spaced apart from each other within the working space I0 and carried by the stator and the rotary abutl6 ments being equi-distantly spaced from each other around the rotor R. The rotary abutments are thus arranged in diametrically opposite pairs and in consequence thereof a very flne balancing of the rotor is provided, and by equi-distantly spacing the stator abutments from each other as described, the frictional resistance oflered the rotor by the members 21 is equalized at the respective points of contact of same therewith. It will be appreciated that the principle embodied in my invention can, with respect to the sealing means employed herein, be practiced with but a single stator abutment and a single rotor abutment, which arrangement, however, has the disadvantage of producing an intermittent pumping action rather than the most desirable and eflicient continuous pumping of a fluid.

In the use 01 my invention as a motor or prime mover, it will be clear that by supplying a fluid under pressure to the main inlet pipe 39, the fluid in entering the passage is through the inlets 31 will set up pressure in the passage, causing the rotor and stator abutments to co-act in rotating the rotor R in the direction 01' the arrow in Figure 2; the pressure fluid after use being discharged from the passage through the outlets 38.

Although I have herein shown and described only one form of rotary pump or motor embodying my invention, it is to be understood that various changes and modifications may be made therein, without departing from the spirit of the invention and the spirit and scope of the appended claims.

I claim as my invention:

1. A device of the character described comprising a cylindrical stator, a cylindrical rotor journaled axially in the stator and reduced in diameter intermediate its ends to define an annular passage between the stator and rotor having an inlet and an outlet, the rotor being oi less diameter than the internal diameter of the stator, metallic liners interposed between the stator and the end portions 01 the rotor, a liner of yieldable material interposed between the stator and the intermediate portion of the rotor, co-acting means on said liners for securing the yieldable liner against displacement, and co-actlng means on the stator and rotor, responsive to rotation of the rotor, to pump fluid from the inlet through the passage to the outlet.

2. A device of the character described comprising a cylindrical stator, a cylindrical rotor Journaled axially in the stator and reduced in diameter intermediate its ends to define an annular passage between the stator and rotor having an inlet and an outlet, the rotor being of less diameter than the internal diameter of the stator, metallic liners interposed between the stator, and the end portions of the rotor, a liner of yieldable material interposed between the stator and the intermediate portion oi the rotor, the confronting edges of the metallic and yieldable liners having rabbeted engagement to secure the yieldable liner against displacement, and co-acting' means on the stator and rotor, responsive to rotation of the rotor, to pump fluid from the inlet through the passage to the outlet.

. I 3 3. In a rotary machine of the type described, the combination with a stator and a co-operable rotor, between both or which is a working space, an even number of equi-distantly spaced rotary abutments carried by the rotor and an uneven 5 number of radial abutments carried by the stator and extending into said working space for successive co-action with the rotary abutments, the stator having fluid intake and discharge ports opening to the working space at the respective l0 sides of each of the stator abutments, of a yieldable non-metallic liner embraced by the annular wall of the stator and over which the rotary abutments yieldingly roll while in constant fluidsealed contact therewith; and yieldable means carried by the stator abutments for fluid-sealing contact successively with the rotary abutments during operation 01' the rotor.

4. A rotary pump including a stator and a cooperable rotor, the stator having an annular wall and the rotor having a peripheral surface cooperable with said annular wall to define therewith an intervening working space therebetween, the stator having a yieldable liner embraced by said annular wall, the stator having an abutment provided with a yieldable member adjustable transverseLv of the working space and'against the peripheral surface otthe rotor, the stator having fluid intake and discharge ports at the opposite sides oi its abutment, and a rotary abutment carried by the rotor and extending into said working space for co action, respectively, with the yieldable liner and the aforestated yieldable member during rotation of the rotor, and having constant engagement with said liner.

5. A rotary pump including a stator provided with an uneven number of pairs oi fluid intake and discharge ports, respectively, a rotor co-operable with the stator and defining therewith a, working space, an abutment extending into the 40 working space from between each pair of intake and discharge ports; an annular member of yieldable'material lining the wall of the stator, an. even number of cylindrical rotary abutments carried by the rotor and co-operable with said annular yieldable member and with the stator abutments to suck fluid into the space at the intake ports, then compress the fluid and discharge same from the discharge ports, and being in constant rolling engagement with said annular member each stator abutment including a yieldable member movable relatively to the peripheral surface or v the rotor and adapted to engage with the rotary abutments when the latter occupy positions between the intake and discharge ports to positively seal the spaces between same and thereby prevent fluid from the discharge sides by-passing to the intake sides of the rotary abutments, the relation of the stator abutments with respect to v the rotary abutments being such that at all times so one of the rotary abutments co-acts with one of the stator abutments while all remaining rotary abutments are being moved in active pumping directions through said working space.

EDMOND R. DUDLEY.