US2727469A

US2727469A - Power pumps

Info

Publication number: US2727469A
Application number: US311590A
Authority: US
Inventors: Howard K Pinkerton
Original assignee: Gardner Denver Inc
Current assignee: Gardner Denver Inc
Priority date: 1952-09-26
Filing date: 1952-09-26
Publication date: 1955-12-20
Anticipated expiration: 1972-12-20

Description

Deu 20, l1955 H. K. PINKERTQN 727,469

POWER PUMPS Filed Sept. 26, 1952 3 Sheets-Sheet 2 Dec. 20, 1955 H. K PINKERTON 2,727,469

POWER PUMPS Filed Sept. 26, 1952 5 Sheets-Sheet 3 United States Patent() POWER PUMPS Howard K. Pinkerton, Quincy, Ill., assguor to Gardner- Denver Company, Quincy, lll., a corporation of Delaware Application September 26, 1952, Serial No. 311,590

2 Claims. (Cl. 10S-202) My invention relates to improvements in power pumps and is more particularly directed to that type of pump intended for use in oil, mining or industrial operations, wherever moderately high pressures are required.

My invention is adapted particularly to a structure whereby rigidity is given to the frame of the unit and a more satisfactory assembly is' provided, rendering replacement and renewal of parts economically and with little effort. The main shaft may be removed and a new one installed without removing the eccentric and gears from the frame. Similarly, the bushings in the eccentric can be examined or removed and replaced without removing the eccentric from the frame. Another object of the invention is to provide improved means for holding the ends of the shaft in the frame.

Another object of the invention is to provide improved means for supporting the ends of a main shaft upon which certain elements rotate for driving the pump.

Still a further object of the invention is to provide a rigid shaft upon which certain eccentrics and gears rotate, with improved means for locking the ends of the shaft to the frame.

Further objects of the invention will hereinafter appear, and to all of these ends the invention consists of the features of construction, arrangement of parts, and combination of elements, substantially as hereinafter fully described and claimed in the specification and shown in the accompanying drawings, in which: Y

Figure l is a vertical sectional view taken longitudinally through a pumping unit, showing the power end and the pumping or uid end.

Figure 2 shows one method of mounting the main shaft Within the side walls of the frame enclosing the power end.

Figure 3 is a perspective view of one of the bearing elements for the shaft end.

Figure 4 is a perspective view showing a tapered sleeve which ts upon the shaft end and within the element shown in Figure 3, and

Figure 5 is a sectional view taken through the power end of a larger pumping unit, vshowing another method of mounting the main shaft in the side walls of the frame.

Briey the invention herein about to be described is an improvement in the method of mounting a main shaft in the side walls of a power pump. Heretofore such shafts have been of the revolving type, supported by tapered or roller bearings, positioned within the side walls of the pump frame. The result being that longitudinal movement, to a certain degree, of the shaft is permitted with respect to the bearings, thus creating a general spreading action between the side walls, causing misalignment of the shaft and the elements associated therewith.

The present invention provides means for rigidly mounting each end of a driven shaft in the side walls of a frame forming a positive support upon which the V2,727,469 Patented Dec. 20, 1955 ICC eccentric and gear rotate, eliminating the possible longitudinal movement of the shaft and likewise the spread of the frame.

With these and other objects in view, numeral 1 indicates the side of a support or skid upon which the pumping unit is mounted, the unit including a fluid end 2 and a power end 3.

The fluid end 2 includes a cylinder block having suitable inlet and outlet valves, one of which is shown at 4 and a cylinder lining 5 in which is positioned for reciprocation a piston 6 having a rod 7 connected to a crosshead 8.

Movement of the piston 6 within the cylinder 5, will, of course, draw liquid or semi-liquid material in the cylinder and force the same out under high pressure to its point of use. Such a structure is well known in the art and it is therefore deemed unnecessary to show and describe in detail the full structure involved, inasmuch as the invention does not reside therein.

The power end of the pump includes a frame structure having side walls 9 in which are supported certain shafts hereinafter set forth. The frame includes a removal cover 1G for access to the working parts of the power end.

The power end includes a main shaft 11, the ends of which are rigidly supported against movement in suitable housings 12, formed within the side walls 9 of the frame. Also positioned within the side walls of the frame are the ends of a rotating jack shaft 13, supported upon suitable roller bearings 15 held within a removable cap 16 bolted to each side wall. One or both ends of the shaft may extend through the cap 16 for the reception of a driving gear or the like, not shown, to which operating force is delivered from a suitable power unit.

The jack shaft 13 carries one or more gears 17 formed integrally therewith or rigidly connected thereto and which are adapted to mesh with corresponding gear rings 18, detachably connected to hubs 19 rotatable about the fixed main shaft 11. Each gear hub 19 is provided on one of its faces with an eccentric 20 about which is positioned a ring 21 of a connecting rod 22, the free end of the rod being pivotaily connected to the crosshead 8.

All of the foregoing is common in any pumpingunit of a class referred to regardless of size or volume. The present improvement residing in the method and means for mounting the ends of the main shaft within the side walls of the frame, for the purpose previously set forth and hereafter apparent.

Referring to the drawings, particularly Figure 2, it will be observed that the gear hub 19 and eccentric 20 have pressed therein a bushing 23 which forms a removable bearing for the reception of the main shaft 11.

To prevent longitudinal movement of the bushing 23 and the hub 19 with respect to the shaft 11, there is fitted over each end of the shaft a thrust bearing ring 24, the inner vertical face of which might be engageable with the eccentric 2!) and bushing 23 tending to hold the same in proper position upon the shaft 11 and the gear ring 18 in its proper relation with its rJo-acting gear 17 carried by the shaft 13. The periphery of the ring 24 has a plurality of outwardly extending projections or fingers 25 against which a suitable tool might be placed to rotate the ring upon the shaft 11 for a purpose hereinafter described.

As shown in Figure 2, the ring 24 has locked to its outer face, by a removable stud bolt 26, a threaded nut or ring 27 for engagement with a second threaded ring 28 fitted snugly within the housing 12 and held against rotation by a locking pin 29 hereinafter described.

Thus it will be apparent that by placing a tool or the like against any one of the projections 25 of the ring 24, the ring 24 may be rotated with respect to the shaft 11. When rotated the threaded ring 27 locked thereto will rotate and move inwardly or outwardly with respect L:entraine 3 tothe rin'g 28,-'n1ovin`g "the bearing ring 24 to its proper position between the end of -thehousing v12 andthe eccentric 20.

To support the ends of the shaft 11 within the housing "1-2',"`foned inf opposite vertical walls ofthe frame 9, Aeach 'endof the s'ha'ft'has pressed thereon a collarf'lai), the outer periphery of which tapers toward its outer end or the 'end in ilang'el which 'abuts the end of ltheshaf-t 11 preventing furtherl longitudinal lrnov'ernentof the collar upon ythe shaft end.

-Shown inFigure 4, the collar 30 is provided with a longitudinal slot 32 extending 'from 4one end face to the other v'and `through the '-ange 31, the purpose being to permit expansion fof the collar when pressing the *same upon the shaft end. The collar 30 is further provided with 'holesor p'assagewa'ys 34 through which may pass a locking lbolt-36 threadedly connected to the adjusting nut 27. Thusitwill 1ibe lapparent that when the thrust plate or'rin'g 24 is'adjnsted Withrespect to the hub and bushing, and Within thefiixe'd threaded ring 28, the plate 24 -may'be locked -in'its=desire`d position bythe bolt 36.

Fitted within the housing 12 is a ring 38 provided at each end Ywith'diarnetrically opposite slots 39, permitting 'expansion' and contraction of the ring with respect to the housing 12 and 'the collar 30 over which the ring 38 is positioned for movement. VIt will be noted that the inner face yof the ring 38 tapers correspondingly with the coacting tapered periphery of the collar 30. The inner end face of the Yring 38 is provided with a socket 33 to receive the extending end of the llocking-pin 29 Xed within the adjacent face of thestationary threaded ring 28. Such a structure permits longitudinal movement of the ring 38 with respectto its feo-acting elements but prevents rotary movement of Vleither the ring 38 or threaded ring 28. Thus anyinwa'rd movement of thering 38 upon the collar 30 will cause a wedging 'action rbetween the collar and the'housing 12locking rigidly the shaft 11 to the sidewall 9 and at the same `time preventing any longitudinal or rotary movement of the shaft.

The outer 'end 'fa'ceof the ring 38 carries a plurality of threaded sockets 40 for the reception of stud bolts'f41, securing to the ring 38 an end plate 42. The plate 42 is locked against movement with respect to the shaft end by a stud bolt-43 passing through the plate and threadedly receivablewithin a socket formed in the end of the shaft. 'From 'this -structure it Vwill -be apparent that Vby turning the 'threaded s'tud bolt 43 in -one direction, the wedging ring 38`Will be forced inwardly of the housing i2, locking rtuly'thereto the shaft'end. If desired, additional stud bolts 43 may be provided to equally distribute the wedging Aforce to all areas of `the ring 38.

It will be further notedthat lthe plate 42 supports the outer 'end of l:the ladjusting vbolt 36 which is threadedly connected to the nut 27 serving t0 lock the same against movement.

The 'plate 42 supports a lubricating conveying tube 44, the inner-end 'of -Which communicates vwith a passageway 45 formed within 'the `shaft end and leading to one end of the rotatable :bushing 23 pressed with the hub 19 and eccentric 20. The outer end of the tube 44'is locked'to 4 a removable plate 46 closing the housing 12 and forming laweover-fer-thefsnpportingelementsof -thev-shaft-vtherein.

Referring to Figure 5 itfwill be observed that all of the elements of the pumping unit previously described, are present with the exception of those forming the means for locking the shaft within the housing 12 of the ,side walls 9. Shown in this `structure the pump includes a plurality of ring gears 18 and eccentrics 20 rotatable upon the fixed shaft 11, the"'en}sof`Which are tapered and have pressedjthere0n-atapened ring -55 .keyed to the shaft as indicated at ISG and-alsokeyed-.to the housing 'as indicated at S3. The collar is maintained within the housing 12 and upon the tapered end of the shaft 11 by an end plate 57 rconnectetlto'the 'shaft "by the `stud lbolt orA 'bolt S8' and to the outer face' fof the-collar by-Astuds 59. Thus it will be apparent that by tightening the stud bolt 58, the plate will be moved inwardly toward the shaft end and at the same time forcing the tapered ring within the housing 12 and upon the tapered end of the shaft. Thus a rigid structure isprovidedrfor-"supporting' .the shaft v11 against longitudinal'fand rotaryrfmove'ments with respect to 'the side'fwalls.

F rom fthe foregoing, ,it is thought that the construction, operation land many-:advantages -of the herein described invention 'will be=apparent-to those skilled in the art without 'further-description,aand'it will `be understood that various=changesfin Athe size, shape, proportion and minor details of'construction may -be resorted to without departing from the spirit :or lsacrificing Aany of the advantages of the invention.

What-I claim, is:

l. vA 'unit'of'v the Yclass described-including ya frame, a shaft supported bythe frame `and :having rotatable thereon a gear and eccentric, means rigidly connecting the shaft lto fthefframe -includingfagpair of relatively movable tapered -ringsfan adjusting ring rotatable about the shaft holding the gearfandeecentric against longitudinal movementthereof, and-meanslockingdhe adjusting ring against movement with .respectv'to the tapered rings.

'-2. Avtunit of the class`=described including 'a frame, a shaft supported by the frame and having rotatable thereon a'gear :and ,eccentric, a pair of relatively movable tapered rings; one 4engaging the V-shaft -and the other A`the -frameholding the shaftagainst movement, an ladjusting ring rotatable about itheshaft ymaintaining the gear and eccentric against longitudinal movement thereof, and means locking the adjusting ring and tapered rings against movement -one vwith respect -to'the other.

References Cited in the vfile tof lthis `patent UNITED STATES PATENTS `989,775 Fraser- '.Apr. 18,.:1911 1,068,148 Lyon et al July 22, 1913 1,3785091 Carlsen May 17, 1921 2,540,656 vCourtot Feb. 6, 19.51 .2,654,326 Sheen -etal. Oct; 6, 1953 2,680,633 'Brown .`une`8,l 1954 FOREIGN PATENTS 260;486 Switzerland July 16, 1949