US2005107A - Pump piston lubrication construction - Google Patents

Description

J1me 1935- 1. M. PHILLIPS ET A1.

PUMP PISTON LUBRICATION CONSTRUCTION Filed July '28, 1952 3 Sheets- Sheet l 3 Sheets-Sheet 2 Z a QN A k L 1N N u. W i :5 W k W ug 4 f\\ MT) Rm Iii- 5:2: l||| l. M. PHILLIPS ET AL Filed July 28, 1952 PUMP PISTON LUBRICATION CONSTRUCTION z? QM $1M.

June 18, 1935.

June 18, 1935.

l. M. PHILLIPS ET AL PUMP PISTON LUBRICATION CONSTRUCTION Filed July 28, 1932 3 Sheets-Sheet 3 1 Liv/67250725 fry/149% fiizZl 'os Fwd ZUCg/[rzs a Patented June 18, 1935 2,005,],

- UNITED'STATVES PATENT OFFICE rum r1s'roN LUBRICATION cons'rnoc'rron Irvin: M. Phillips and Paul w. Kalinsey, Chicago,

111., assignors to Continental Equipment Company, Chicago, 111., a corporation of Illinois Application July 28, 1932, Serial No. 025,312

6 Claims. (01. 103-111) This invention relates to pumps, and more par- As thus illustrated, the invention comprises a ticularly to reciprocating pumps of the double cylinder block or casting I having the four bores acting type in which a double piston or plunger 2 therein, with a piston or plunger 3 adapted is employed, whereby a pumping action is proto reciprocate in each bore. The said cylinder duced for each stroke of the pump. block is supported on a base 4 having the fluid 5 Generally stated, the object of the invention inlet 5 therein, and a top or cap 8 is bolted to is to provide a novel. and improved construction the top of the cylinder block, this cap having the and arrangement whereby two separate pistons fluid outlet 1 as shown in Fig. 2 of the drawings. or plungers are employed, at opposite sides of the The cylinder block is provided with passages 8 l0 driving shaft, with means on said shaft for rewhich communicate at their upper ends with the 10 ciprocating said pistons or plungers in unison, fluid outlet '5, and at their lower ends with the although not rigidly connected together. fluid inlet 5, as shown more clearly in Fig. 2 of Another object is to provide a novel and imthe drawings. Cylinder heads or end plates 9 proved construction and arrangement whereby and it are bolted to the opposite ends of the lo the cylinders are in the form of a block or castcylinder block, as shown in the drawings, thereing provided with a separate bore for each pisby to close the outer ends of the four bores in ton, with recesses and passages therein for the which the pistons or plungers reciprocate; plunger operating means on the shaft, and for Flat inlet valves ll, yieldingly held down by the flow of the fluid into and out of the pump. springs i2, admit the fluid from the passage 5 29 Another object is to provide a novel and iminto the passages s, and similar valves i3, yieldproved construction and arrangement whereby ingly held down by springs M, control the flow of the fluid pressure is advantageously employed to the fluid from the pistons 3 to the outlet 1, in force 011 or grease or any other suitable lubricant I a manner that will be readily understood. As into the difierent bearings of the pump, andinto shown more clearly in Figs. 3 and 5 of the drawthe interior thereof, thereby to lubricate the ings, guide pins i 5 are providedtoengage notches 25 different moving parts. it in the ends of the valve plates, thereby to Another object is to provide a novel and imguide the valve plates in the up and down moproved construction and arrangement whereby tion thereof. the Said Pistons and cylinders are p y d n One of the two alined pistons or plungers 3,

3o duplicate, so that there are four pistons and four for each pair, is connected by a pitman i] with cylinder bores, arranged side by side, whereby the eccentric 88 on the shaft N, which latter is said shaft is operative to actuate all four pistons supported in ball bearings 20 at opposite sides of 0 p e thereby to more n arly maintain I the pump structure. The eccentric strap is made the constant or continuous flow of the fluidinto in two parts, and held together by the bolts 2|,

and out of the pump. and at the other side this strap is connected by 35 It is also an object to provide certain details a link or pitman 22 with the other of the two and features of construction and combinations lin d pistons or plungers, in each pair of plungtending to increase the general efliciency and the ers. The two eccentrics it, one for each pair of desirability of a pump of this particular charpistons or plungers, are set oppositely, so that 40 acter. one pair of pistons alternates in its reciproca- 40 To the f in and other ful ends, the tion with the other pair. In this way, there is invention consists in matters hereinafter set some movement of the pistons, relatively, toforth and claimed, and shown in the accompanyward and away from each other, and a more ins drawings in wh chnearly constant or continuous flow of the fluid Fig. 1 is a horizontal section on line l-l in into and out of thepump. 45 F g. 2 of the drawings. Show a Pump embody- It will be seen that the wrist pins 23 of the ing the principles of the invention. pistons or plungers, and also the eccentric pins Fig. 2 is a longitudinal section on line 2--2 in 24, are very easily removed, and the entire struc- Fig. 1 01 the drawings. ture is easily and conveniently taken apart, when Fig. 3 is a transverse vertical section on line such is necessary or desirable, in order to repair 3-3 in Fig. 2 of the drawings. or clean the pump, or to substitute new parts Fig. 4 is a vertical section ofthe lubrication for worn parts. feeding device forming a part of the invention. The shaft 19 has a longitudinal oil duct 25 Fig. 5 is a detail section on line 5-5 in Fig. 2 which communicates with the transverse oil of the drawings. .ducts 26 in the eccentrics, and these ducts in 55 mmcommunicatewiththeduets IIinthemtmanlLandalsowiththeductsllinthelinks ilpreviouslymentioned. Inthiswaytheec centrics and the parts connected thereto are offectively lubricated, by any lubricant forced into thechamber flattheendoftheshaft. 'Forthis purpose, a pipe I. communicates with said chamber II, and also communicates with the top portion of the lubricating feed device 8| shown inr'ig.4ofthedrawinga. Thlsdevicehasa relatively large plunger 32 operated by the relatively small piston ll, the-latter being actuated by the fluid 34 forced into the lower end of the device through the pipe I! from the end of one of the bores 2 of the pump, whereby the pressure of the pump actuates the piston 33 thereby to move the plunger 32 upward and force the oil or other lubricant It into the pipe Ill previously mentioned. In addition, another pipe 31 leads from said device to the ducts 38 at one side of the pump cylinder block, thereby to lubricate the bearing at this side of the pump. The gauge 3! moves up and down with the plunger 32, and

serves to indicate'the quantity of lubricant in the lubricating feed device. In this way, as stated, the fluid pressure of the pump is employed to force lubricating material into the pump, to lubricate the difl'erent moving parts thereof, and when the pump is not operating, the lubricating feed device is not in operation.

In operation, it will be understood that the pressure in the space around the shaft between the plungers is substantially less than the pres- I sure at each end of the cylinder, between the cylinder heads and the plunger heads. In this way, the oil for lubricating purposes is easily forced into the pump bearings, through the shaft duct or passage Ii, in, the manner heretofore described. Itwillbeseenthatthememberllcanalsobe used as ahandle by which to pull the piston and the plunger downward, to permit fllling of the fluid chamber above theplunger. Any suitable means can be employed for fllling the device, such as a filler ll at the top ofany suitable known or desired character.

Thus the differential between the area of relatively low fluid pressure adiacentthe bearings,

. and between the plunger heads of the pump, on

the one had, and the relatively high area of fluid pressure between the plunger heads and the cylinder heads, is utilized to automatically force the lubricating fluid out of the lubricating device and into the area of relatively low pressure around the bearings. Any suitable means can be employed for causing the relatively low fluid pressure, and the relatively high fluid pressure, the pump element shown and described being an example of how this can be done, and being illustrative of the mode of operation'of the lubricating system thus provided.

Thus it 'will be seen that the pump plungers are arrangedinpairs,withtheheads ofeachpairdisposed at opposite sides of the shaft I0, and with the eccentrics ll set wpositely, whereby the plungers of one pair are moving in one direction while the plungers of the other pair are moving in the opposite direction. In this way, a plunger of onepairisforcingthewateroutofthepumpat thesametimethataplunger ofthe other pair at the other side of the shaft is forcing the water out of the pump, whereby each plunger is counterbalanced by the plunger of the other pair. In this way, thepressm-e on the ahaftis balanced,

to some extent, so that objectionable side thrust on the ahaftis avoided.

8 areeach separate from the others, but that the space or clearance chamber ii at the middle of theflat one-piece cylinder block is common to the twoeccentric devices that operate the plungers, and this clearance chamber can be fllled with a lubricant, in the manner explained, to lubricate the pistons in their bores. With reference to the latter, it will be seen that each bore has an axial extension, at the other side of the flow chamber 8, and that these extensions are covered "by the removable cylinder heads 0 and II previously described.

It will be seen that the bores 2 have their outer ends disposed in vertical planes, and, thatwthe valves I I and I3 extend. horizontally in these vertical planes, and that in this way the over-all length of the pump is somewhat less than it might be with the passages I formed diiferently, and with the said valves outside of the said vertical planes, whereby the construction shown and described tends to shorten the pump without any restriction of the upward flow of water in the passages or chambers I, as the plungers do not enter these flowchambers.

What we claim as our invention is:

1. Ina double-acting pump, the combination of a one-piece solid cylinder block having a flat top and a flat bottom and formed with a middle clearance chamber open at the top and bottom thereof, and with flow chambers, open'at top and bottom in the end portions of said cylinder block, whereby the middle and end chambers are all of the same height, and having axially aligned horizontalbores connecting said middle chamber with said flow chambers, midway between the flat top and bottom'surfaces of the block, with the outer ends of said bores in vertical planes, plungers in said bores, mechanism in said clearance chamber for operating said plungers, accessible through the top of said clearance chamber, a

fluid intake base secured flatwise to the bottom of said cylinder block, closing the bottom 'of said clearance space, a fluid outlet cap secured flatwise to the top of said cylinder block,- closing the top of said clearance space, an inlet valve for the bottom of each flow chamber, an outlet valve for the top of each flow chamber, said valves being disposed horizontally in'said vertical planes, and means for actuating said mechanism, the stroke of each plunger stopping short of the adjacent flow chamber, comprising similar bores and plungers in said cylinder block, parallel with and in the same horizontal plane as said flrstmentioned bores and plungers, with said clearance chamber common to all plungers, but with similar separate flow chambers and valves for said last-mentioned bores and plungers, and mechanism in said clearance chamber to actuate said last-mentioned plungers, one pair of plungers operating in one direction while the other pair is operating in the opposite direction. 2. A structure as specified in claim 1, said base having a single intake opening communicating with the lower ends of said, flow chambers, said cap having a single outlet communicating with the upper ends of said flowchambers, and said mechanism comprising a horizontal shaft disposed in. a plane midway between the horizontal planes of said flat top and bottom.

,3.A structure as specified in.claim 1, each said mechanism comprising an eccentric cam,

It will be seen ,that the upward flow chambers astraponsaidcamanarmrigidwithsaidstrap 7g and pivoted on one plunger, and another arm pivoted on the extreme other side of said strap and having pivotal connection with the' other plunger, said shaft being removable endwise, and said mechanism parts being removable upwardly by removing said cap, the rigid arm of one mechanism being at one side of the axis of said cams, and the other rigid arm being at the opposite side of said axis.

4. A structure as specified in claim 1, said means for actuating said mechanism comprising a horizontal shaft in the plane of said bores and plungers, said shaft having a longitudinal passage extending from one end thereof and having passages extending laterally therefrom to feed a lubricant to the parts of said mechanism, bearings for said shaft, means forming a chamber around the end of the shaft from which the passage extends, and means for feeding a lubricant to said chamber, to lubricate one bearing, and to supply the lubricant to said passage, and means for feeding the lubricant to the other bearing.

5. A structure as specified in claim 1, comprising outer extensions of said cylinder bores, of the same diameter as the latter, at the other side of each separate flow chamber, forming part of each flow chamber capacity, a'single plate forming a cylinder head for closing the two extensions at one end of the block, and another single plate forming a similar head'for the other end of the block.

6. A structure as specified in claim 1, said outlet valves resting normally on the flat top of said block, and said inlet valves resting normally upon the flat top of said base, together with vertical pins in the top of the block for guiding said outlet valves, and similar pins on the top of the base for guiding said inlet valves.

IRVING M. PHILLIPS. PAUL W. KALINSEY.

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