US2328717A

US2328717A - Pump

Info

Publication number: US2328717A
Application number: US397262A
Authority: US
Inventors: Rudolph W Glasner
Original assignee: MIDLAND MACHINE CORP
Current assignee: MIDLAND MACHINE CORP
Priority date: 1941-06-09
Filing date: 1941-06-09
Publication date: 1943-09-07
Anticipated expiration: 1960-09-07

Description

Sept. 7, 1943. R. w. GLAsNl-:R

PUMP

'Filed June 9, 1941 5 Sheets-Sheet 1 Sept. 7, 1943.

R. W. GLASNER PUMP Filed June 9. 1941 5 Sheets-Sheet 2 sept. 7, 1943.

PUMP` Filed June 9, 1941 5 Sheets-Sheet 4 uur ` R. w. GLAS'NER 2,328,717

Sept.' 7, 1943. R. w. GLASNER 2,328,717 l PUMP i Filed June 9, 1941 5 Sheets-Sheet 5 Patented Sept. 7. 1943 PUDM? Rudolph W. Glasner, Chicago, Ill., assignor to Midland Machine Corporation, a corporation ci minors Application .nine 9, 194i, serian No. senese (ci. s-isi) 10 Claims.

o This invention relates in general to pumps or motors, but more particularly to the type generally known as radial piston pumps, and one of the objects of the invention is to provide in a pump of this character improved means whereby liquid may be pumped at high pressure and in a steady flow with no noticeable pressure fluctuations or pulsations by reason of the employment of a large number of pistons operating at a high rate or number of strokes per minute, to pump or compress the liquid, while at the same time a large number of pistons are operating to discharge the liquid.

Heretofore in pumps of this character there has been providedl a piston operating eccentrically mounted ring adapted to be bodily adjusted or shifted so as to vary the volume of delivery of the liquid, and this has been accomplished by bodily sliding the ring edgewise within the pump casing.

The operating ring is very heavy and difficult to shift and the diiiculty of such an adjustment is greatly increased by reason of the re-active pressure exerted by the pistons upon the ring.

In large pumps it has been attempted to overcome this objection and dimculty by providing roller surfaces for the ring to be adjusted upon,V

but such provision resulted in the production of a large construction of pump, and an increase in the cost of manufacturing.

It is therefore another object of the present I invention to provide in a pump or motor of this character, an operating ring for the pistons, which is mounted for swinging or pivotal adjustment,- and which ring will not only be subject to easy adjustment, but will also be sensitive in operation, due to the leverage produced by such swinging: or-pivotal mounting thereby obviating the necessity of having to bodily slide lor adjust the entire ring and its cooperating parts.

line l-I Figure 2 of a pump of this character constructed in accordance with the principles of this invention.

Figure 2 is a vertical sectional View taken on .line 2-2 Figure l.

Figure 3 is a detail perspective viewv of the pump casing with parts removed.

Figure 4 is a detail perspective view of a portion of the pump casing with parts removed, and with the rotatable cylinder barrel in position, parts of the pump being broken away.

Figure 5 is a detail perspective view of the rotatable cylinder barrel with the piston impeller ring in position with respect thereto.

Figure 6 is a detail perspective view of the rotatable cylinder barrel.

Figure 'i is a detail perspective view of the stationary pintle and pintle head with parts in section.

Figure 8 is a view taken on line 8-8 Figure 7, partly in elevation and partly in section.

Figure 9 is a sectional view taken on line 9-9 Figure 7.

Figure 10 is a sectional view taken on lines IU-III Figure '1.

Figure 1l is a front elevation of the pump, on a reduced scale, showing the indicating gauges for indicating the position of the shifter ring.

Figure 12 is a detail sectional view of a modiiled form of the mechanism for shifting the shifter ring.

Referring more particularlyto the drawings, the pump consists essentially of a casing I5 preferably in the form of an annular ring and havinga'sup'porting base IS-V-a. An end plate I6 is provided for the casing and is secured in posi- V tion in any desired or suitable manner, such as A further object is to provide improved means 'for shifting the pump piston operating ring'.

, Astill further object is to provide improved means whereby the direction of flow of the liquid into and out of the pump may be vreadily reversed.

VTo the attainment of these ends and the accomplishment of other new and useful objects as will appear, the inventionl consists in the features of novelty in substantially the construction, combination and arrangementv of th several parts hereinafter more fully described and claimed and shown in the accompanying drawings illustrating this invention, and in which Figure 1 is a vertical sectional view taken on by means of screws or bolts I1.

The casing is provided in its wall with an outwardly opening recess I8 and in the bottom of the recess Vthere is provided an opening I9 passing therethrough.

'Ihe numeral 20 designates a pintle having a head 2|. The pintle projects through the opening I9 in the wall of the casing and extends into the casingbut terminates short of the opposite wall.A The pintle head 2| is seated within the recess I8 and is secured against displacement in any suitable manner.`

The diameter of the pintle 20. is somewhat less than the diameter of the opening I9 in the casing wall and surrounding the pintle is a rotatable cylinder barrel 22, one end of which pro- .ects into the opening I9, and this'end'is preferably reduced, as.- at 23, to form the seat for one of the members 24 of a bearing race, while the other member 25 of the bearing race contacts the wall of the opening I9, roller bearings `26 being disposed between the race members 24-25.

The other end of the cylinder barrel 22 projectsinto an opening 21 in the end plate |6, and a bearing plate 28 forms a closure for this opening, being secured in position in any desired or suitable manner, such as by means of screws or bolts 29. The plate 28 is provided with a laterally projecting circumferential flange which projects into and has bearing against the wall of 'the opening 21, and this ange surrounds one end 22-0. of the barrel 22. This end 22--a of the barrel is reduced to form a seat for one of the race members of the roller bearing unit 36-3 I- 32. The flange on the end 28 is also shaped` to form a seat for one of the race members of the bearing.

With this construction, the pintle member being stationary, the cylinder member 22 may be rotated about the pintle, being supported by the roller bearings. The bearing plate 28 is recessed to form a chamber 33 and the end of the cylinder member 22 is notched or recessed, as at 34 .(see particularly Figure 5).

A shaft 36 which may be a driven or a driving shaft projects through an opening 31 in the bearing plate 28 and is provided with an enlarged end portion 38 which is disposed within the chamber 33. This enlarged portion (see also Figure 4) projects into the notched or recessed portion 34 of the rotatable cylinder member 22 to form a connection therewith. and the shaft 36 is secured to the rotatable cylinder member 22 in any desired or suitable manner, such as by means of screws or bolts 39, whereby the shaft 36 and the cylinder member 22 will rotatedv together.

The end 38 of the shaft 36 is recessed, as at 40, and the proximate end of the pintle 26 is reduced, as at 4|, so as to project into the recess 40, roller bearings 42 being disposed between the reduced end 4| of the pintle 28 and the inner surface of the rotatable cylinder member 22, the roller bearings 42 serving as a means for supporting the end 4| of the pintle.

Within the cylinder member 22 is provided any desired number of cylinders 43 preferably arranged in two separate series concentric with the axis of the cylinder member. These cylinders are provided with open bottoms 44 which are movable into and out of registering relation respectively with ports or passages 45-46 in the pintle 20. The ports or passages 45 have communication with a passage 41 in the pintle 20 and two of such passages 41 (see particularly Figures 1 and 2) are provided and have communication with a chamber 48 in the pintle head that has an opening 49 in communication with the supply of iiuid.

'I'he ports or passages 46 have communication with similar passages 50 in the pintle and these passages 50 have communication with a chamber 5l in the pintle head 2| and which chamber 5| has a discharge outlet 52 connected to the discharge side of the pump.

As the piston member 22 isrotated some of the cylinders 43 have communication with the ports or passages 45 while others have communication with the ports or passages 46, so that when the cylinders are in communication with the passages 45 they will be supplied with the uld with the ports or passages and into communication with the ports or passages 46, the fluid will be discharged through the latter ports or passages, through the passage and out through the outlet 52. 'I'hus as the cylinder member 22 rotates, the piston will alternately operate to draw in and create a pressure upon the liquid and then discharge the same through the discharge passage 52.

The pintle 20 is also provided with ports or passages 53 (see particularly Figure 10) which have communication through ports or passages 54 with the passages 58 in the pintle, and the pintle is also provided with ports or passages 55 which have communication with the passages 41 in the pintle through the passages 56.

These ports or passages 53-54-55--56 are provided so that they will be connected with the pressure side of the pump, according to the direction of rotation of the cylinder member so as to equalize the pressure on the pintle 28.

The ports or passages 45-46 may be provided respectively with restricted portions 51-58 to prevent a too sudden stopping of the pump as the discharge of the iiuid out of the cylinders will be restricted.

In the cylinders 43 pistons 59 operate and these pistons are arranged in series corresponding to the series of cylinders. Each piston is provided with a head (see also Figures 5 and 6) which are preferably irregular in cross-section so as to prevent them from rotating axially and these heads operate in recesses 6| in the cylinder member.

A pin 62 passes through the heads of cooperating pistons 59 and projects a substantial distance therebeyond. Rollers 63 are mounted upon the pins 62 and have engagement with a roller track or ring 64. The track or ring 64 is supported by end plates 65 of annular coniiguration and are provided with hub portions 66 that encompass and are spaced from the cylinder member 22.

Arranged within the casing of the pump is a shifter ring 68 which is provided with an arm or projection 69 by means of which the shifter ring may be pivotally mounted withinthe pump casing. This mounting may be formed in any suitable manner but preferably by means of a pivot pin 18 which passes through the arm or projection 69 and has bearings, as at 1| in the pump casing I5. One of the bearings 1| is preferably open and the other closed, and the open vend is closed by the end plate I6 of the casing. 'I'he shifter ring 68 has connected to it end plates 12 which are of annular conguration, the diameters of the openings in the end members 12 being substantially greater than the external diameter of the hub portions 66 ofthe end plates 65 which support the roller bearing ring 64. Disposed between the inner peripheries of the end plates 12 and the outer periphery of the respective hub portions 66 of the end plates 65 are roller bearing members 13 by means of which the end plates 65 and the roller track or ring 64 are supported so that when the shifter ring or member 68 is moved, in a manner to be hereinafteridescribed, the roller-track or ring member 64 and the end plates 65 will be correspondingly shifted so that they will be moved into an eccentric position with respect to the cylinder member so as to vary the quantity or volume of the liquid. By reason of the shifting of the shifter ring and its associated parts about its pivot 10 to onev side or the other of the vertical) ow of the fluid into and out of the passages 4'! and 5l) may be reversed. That is to say, when the shifter member is in a position on one side of the vertical center, the passages 41 will constitute the inlet passages and the passages 50 the outlet passages. the other-side of the vertical center, the direction of ow of the fluid will be reversed by causing the passages 50 to be the inlet passages and the passages 41 to be the discharge passages.

This is effected by reason of the fact that the shifter ring which operates the pistons will be moved to different eccentric positions with respect to the axis of the rotatable cylinder member 22.

When the pump is started or running slowly, and there is not suiicient centrifugal force to throw the pistons outwardly to create a suction to draw in the liquid, the pistons will be moved outwardly by reason of the grooves 61 in the end plates 65 of the roller track or ring 64 into which grooves the ends of the pins 62 project. When, however, the speed of rotation of the cylinder member 22 is sufficient the pistons will be thrown out by centrifugal force but will be fo'lfcedin-` ber 'I8 having a projection 'i9 thereon which lat-l ter extends through an opening 80 in the wall of If the shifter ring is moved to the housing 15 and engages in a slot or recess 8l in the slide 14. Thus by operating the screw 16' through the medium of the handle 'll it will be seen that the shifter ring can be moved to any desired position about its pivot. I

If desired and instead of operating the shifter ring manually as just described, means may be provided whereby it may be actuated by fluid pressure, and to that end the chamber 'l5 may be provided in its wall with openings 82-83 (see Figure 12) with which pipes 84-85 have communication. When fluid pressure is admitted through either oneY of these pipes into the chamber 'l5 the other will constitute an outlet pipe. Thus by controlling in anyn desired or suitable manner not illustrated, the admission of the fluid into either one or the otherof these pipes, the direction of adjustment ofthe shifter ring may be controlled.

As a means for indicating the position of the shifter ring 68 or the extent'ofadjustment thereof, suitable indicating mechanism may be provided. A simple and efficient means embodies, in the present form of the invention two plungers tt-Bl one of which is arranged on each side of ly upon a suitable bracket 94.

as at 9|, with an indicator or pointer 92, the latter beingpivotally mounted, as at 93, respective- These pointers respectively cooperate with graduations or indications 95 provided on a suitable dial 96.

Thus it will be seen that when the shifter ring is moved in one direction or the other, from its central or neutral position, it will be swung about its pivot and such direction of movement and position of the shifter ring will be indicated by the indicators 92 cooperating with the graduations 95.

'It is thought the operation of the pump willbe clearly understood from the foregoing but briefly. stated, it is as follows:

Upon the starting of the pump by actuating the drive shaft 36 the cylinder member 22 will be rotated about the pintle 20 and until the vspeed o'f rotation of the cylinder member 22 is sufficient to throw .the plunger 59 outwardly to draw or suck in the fiuid, the pistons will be given this movement by means of the grooves 67| in the end plates 65 of the roller or track ring 64.

When, however, the speed is sufficiently increased the plungers 59 will be thrown outwardly by centrifugal force.

During the time that the cylinders 43 are in.

will be increased and the passages 41 will serve as inlet passages, and the passages 59 serve as outlet passages. Therefore, by thusadjusting the shifter ring vthe volume or pressure may be controlled.

-However, should the shifter ring lbe moved about its pivotto the other side of the vertical center from the position shown in Figure 2, the direction of flow of `the uid will be reversed. That is to say.the passages 50 will then become inlet passages while thepassages 4l will become During this direction of now of fluid its pressure or volume may be varied in outlet passages.

a similar manner. t With the present invention it will be noted that there are a large number of cylinders and pistons employed and by reasons of the pistons the pivot of the shifter ring and are adapted to be I' respectively engaged by surfaces 88 on the shifter ring. lThese plungers may be held by means of a spring 89 against the respeotive'surfaces 88- so that when the shifter ring is moved in one direction or the other, one o'r the other of the plungers 86 will be moved against the stress of itsspring 89, while the other of the plungers per minutes. -liquid will be pumped at a high pressure and in a steadyilow with no noticeable pressure fluctuations.

Furthermore, the pump is adapted for a varia- I tion in the volume delivery and reversal of the flow of the fluid. Y

It will also be manifest that the shifter ring being mounted for pivotal movement will be very easy of adjustment and that it will not be necessary to move or shift the entire weight of the ring or overcome the re-active pressure of the pistons upon the roller track or ring. Furthermore, with the present invention it is not only easy to adjust the pump to vary the volume or pressure, but such adjustment is of a very sensitive nature'due to the leverage produced by theA pivotal mounting of the shifter ring.

While the preferred forms of the invention have been herein shown and described, it is to be understood that various changes may be-made in the details of construction and in the combination and arrangement of the several parts within the scope of the claims, without departing from the spirit of this invention.

What is claimed as new is:

1. An hydraulic pump or motor vembodying a cylinder member rotatable in a casing and having cylinder bores, a stationary pintle about which the cylinder member rotates, pistons reciprocable in the cylinder bores, a piston actuating ring surrounding the cylinder member engaging and operating said pistons as the cylinder member is rotated, a shifter ring encompassing said actuating ring, means mounting said shifter ring for pivotal movement, means 'for moving said shifter ring about its pivot to shift said piston actuating ring for varying the volume of delivery of the pump, roller bearings between said cylinder member and the pump casing, roller bearings between said actuating and shifter rings, and roller bearings between the end of said pintle and the cylinder member and housed within the latter for supporting the end of the pintle.

2. In a rotary radial piston pump or motor, a cylinder barrel rotatable in a casing and having a plurality of radial cylinders, pistons reciprocable in the cylinders, a pintle projecting into the casing and about which the cylinder barrel rotates, a piston actuating ring encompassing the cylinder barrel, anti-friction rollers carried by the piston and engaging said ring whereby upon rotation of the cylinder barrel the pistons will be operated, a shifter ring encompassing said actuating ring, means anchoring said shifter ring to the pump casingv for pivotal movement With respect thereto, means for swinging said shifter ring about its pivot to shift the said operating ring to vary the volume delivery of the pump,` and roller bearings respectively between the cylinder member and the casing, the cylinder member and the pintle, and the shifter ring and the piston actuating ring.

3. In combination, an hydraulic pump or motor embodying a shaft projecting into the pump casing, a pintle alined with said shaft and also projecting into the casing and terminating in proximity to the shaft, said shaft being rotatable with respect to the pintle, the end of said pintle being reduced and projecting into a recess in the end of the shaft, said reduced end forming a shoulder on the pintle spaced from the proximate end of the shaft, a cylinder barrel rotatable about said pintle, roller bearings in the said space and vsurrounding the reduced end of the pintle and encompassed by said rotatable barrel, whereby to supportthe end of the pintle, radial cylinders in the barrel, pistons operating in the cylinders, an operating ring for the pistons, a shifter ring encompassing the operating ring, means for shifting the shifter. ring and with it the said operating ring, and an operative connection between said shaft and said cylinder barrel, there being fluid inlet and outlet openings in 'said pintle.

4. In combination, an hydraulic pump or mctor embodying a shaft projecting into the pump casing, a pintle alined with said shaft and also projecting into the casing and terminating in proximity to the shaft, the proximate ends of said pintle and shaft being provided one with a reduced extremity and the other a recess into which said reduced end extends to support the end of the pintle and whereby one will be rotatable with respect to the other, a cylinder barrel rotatable about said pintle, roller bearings housed within said barrel and encompassing the end of the pintle for supporting the latter, radial cylinders in the barrel, pistons operating in the cylinders, an operating ring for the pistons, a pivotally mounted shifter ring encompassing the said operating ring, means for swinging said shifter ringabout its pivot, and an operative connection between said cylinder barrel and said shaft.

5. A pump assembly embodying a casing, a

cylinder barrel rotatable therein and having radial cylinder bores, an actuator member for the pistons, a pivotally mounted shifter ring encompassing the actuator member, means for shifting said shifter ring to vary the volume of delivery of the pump, and indicating 'means extending from the inside of the pump casing to the outside thereof and positioned by the movement of said .shifter ring to provide visible means for indicating the position of said shifter ring.

6. A pump assembly embodying a casing, a cylinder barrel rotatable therein and having radial cylinder bores, an actuator member for the pistons, a shifter member encompassing the actuator member, means for shifting the shifter member, and means exterior of the pump casing for indicating the position of said shifter member, the last said means embodying an indicator and a pointer cooperating therewith and movable onev with respect to the other, one of the elements of the indicating means embodying a spring-pressed plunger projecting beyond the outer face of the casing and engaged byr said shifter ring to be operated thereby.

7. A pump assembly embodying a casing, a cylinder barrel rotatable therein and having radial cylinder bores, an actuator member for the pistons, a shifter member encompassing the actuator member, means for shifting the shifter member, and means exterior of the pump casing Vfor indicating the position of said shifter member, the last said means embodying an indicator and a pointer cooperating therewith and movable one with respect to the other, one of the elements of the indicating means being operable `by the movement of said shifter member, one of said indicating means being disposed on each side of the center of the pump casing and each jecting beyond the said casing and engaged by said shifter member.

8. A pump assembly embodying a casing, a cylinder barrel with a plurality of series of radial cylinder bores laterally spaced, pistons reciproeating in said bores, an actuator ring encompassing the cylinder barrel and operating upon the ends of the pistons, a pintle having inlet and outlet discharge openings with which the cylinders of each series are brought into and out of communication.` annular side plates for the actuator ring, said plates provided with laterally projecting hubs encompassing the pintle, the interior diameter of the hubs being considerably greater than the exterior diameter of said pintle, a shifter ring encompassing said actuator ring, means pivotally A mounting said shifter ring. means for swinging said shifter ring about its pivot, roller bearing pins connected with proximate pairs; of pistons of the adjacent series, said pins projecting beyond the pistons, annular side plates for said shifter ring, into the openings of which last said plates the hubs on said side plates of the actuator ring project, and roller bearings between said hubs and the walls` of the openings in said side plates of said actuator ring, the said side plates of sad'actuator ring having grooves' into which the ends of said'pins project, to be guided thereby and to assist in the operation of said pistons.

9. A radial pump embodying a casing, a pintleY member projecting into the.casng through one wall thereof, said pintle provided with-an en- Iarged head having two chambers' therein out of communication with each other and having uid ingress and egress openings, there being longitudinal passages in said pintle communicating at one end with the respective said chambers,'.

there being a recess in the casing wall encompassing the opening through which the pintle projects and into which recess the said head is seated, a cylinder member rotatable about said pintle and having bores, each provided with an opening in one wall thereof, there "being radial means for swinging said shifter ring about its pivot to vary the volume delivery of thepump, and means for rotating said cylinder member.

10. A radial pump embodying a casing, a pintle member Yprojecting into the casing through one wall thereof, said pintle provided with an enlarged head having two chambers therein out of communication with each other and having iluid ingress and egress openings, there being longitudinal passages in said pintle communicating at one end with Ithe respective said chambers, there being a recess in the casing wall encompassing 'the opening through which the pintle projects and into which recess the said head is seated, a cylinder member rotatable about said pintle and having bores, each provided with an opening in one' wall thereof, there being radial openings in the pintle in communication with said longitudinal passages, and with which radial openings the opening in the wall of the cylinders A respectively move into and out of communication as the cylinder member is rotated, pistons in the cylinders, an actuator ring encompassing the pistons for operating them, a pivotally mounted shifter ring encompassing the actuator ring, means for swinging said shifter ring about its pivot to vary the volume delivery of the pump, means for rotating said cylinder member, and roller bearings between the end. of said pintle and the cylinder member and housed within the latter for supporting the end of the pintle. RUDOLPH W'. GLASNER.