US1489416A - Pump - Google Patents

Description

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PUMP

O. A. ANDERSON ET AL Filed April 14 1922.

prll 8 1924 @mr/4. Ama/@sw Gum/nego April s, 1924. 1,489,416

O. A. ANDERSON ET AL PUMP Filed ApI1.14 v 1922 l' 2 Sheets-Sheet 2 Patented Apr. 8, 1924..

UNITED STATES 1,489,416 PATENT' OFFICE.

OLAF A. ANDERSON AN'D JOHN I. IACBAE, '0F DETMIT, MICHIGAN.

PUD. f

Application illed April 14, 1922. Serial No. 552,506.

he primary object of our invention is to provide a rotary or oscillatory pump which will lift liquid, as a lubricant orwater, from a level lower than thepump, without prim ing,`and maintain a constant pressure on the outgoing liquid. vThis is accomplished, -in

the simple/form of pump, without valvesor any obstructions which wo-uld make any a preciable difference in the .efficiency of t e pump, when encountering dirt, chips, sediment or other foreign `matter held in suspension by thepumped liquid.

Another 'object of this invention is to pro-.

vide a one-waypump of the rotary or oscil*` latory type w1th adjustable means that may be set to permit of the pump maintaining'v a predetermined pressure or head at the discharge side of the pump, and excessive pressure is automatically relieved with'but re.- tarding the action of the pump.

A further object ofour invention is to provide a pump that may have its pumping action reversed and in this type o f ump there are automatically operated valp members completely housed within the pump and requiring no attention whatsoever. when reversin the loperation of the pump.

The a ove are a few of the objects attained by our pump which maybe character.

ized in the`follow1ng articulars;

First, the pumpinc udes a body containing one or more 1mpellin tumblers, which are eccentrically dispose relative to cylindrical chambers of the body and which are adapted to oseillate vanes supported b the pump body and reciprocable in the tum 1ers. vThe vanes a're tangentially disposed relative to the tumblers, 1n contradistinction to a radial disposition, and such arrangement provides4 a maximum capacity for the intake and discharge chambers of the ump.

Second, the construction of t e pump is such that the tumblers and vanes may be standard forv pumps of different pumping capacities, it bein only necessary to rovide pump bodies of ierent sizes and t en in- .withoutincreasing the diameter of the pump or its speed, and in such amultiple unit pump there will be a more constant How of liquid.

Third, with the impelling tumblers disposed to constantly contact with walls of the pump chamber,there is a minimum` pressure on t e impellin tumblers and practically no wear, as a lm of liquid .is constantly maintained between the walls of the pump chamber andthe tumbler, such film of liquid contributing. towards a perfect vacuum, especially when pumping heavy oils, asphalt and the like. Fourth, theimpelling tumblers are yieldably held relative to the walls of the pum ing chamber so that the tumblers may recede under any predetermined pressure or when contacting with anyA obstruction in the liquid being pumped. Y Y

.There are other novel points about the construction and operation of our pump which will be hereinafter specifically referred to, and reference will n ow be had to of the onehway pump; A

.Fi 2'is a cross sectional view taken on the" line II-II'of Fig.'1, showing parts of the pump in elevation; Fig. 3 1s a similar view of a reverslble pump 1n accordance with our mventlon;

. Fig. 4 1s a horizontal sectional v1ew taken 3; Fig. 5 is a longitudinz sectional view of a portion of thereversible pump taken on the line V-V of Fig. 3, and

Figs. 6 to 9 inclusive arediagrammatlc views of the pump rotor in different-positions.

Reference will first be had to Figs. 1 and l2 showing the one-way pump which has been lextensively put into ractice and found highly efficient for li ing liquids, particularly lubricants, and on account of the simplicity of construction enteringinto the pump, it may be constructed on a. small scale for use inaccessible to other pumps.

The pump comprises a pedestal 1, bracket or the like by which the. pump may be secured to a suitable supportand the pedestal affords a .long bearing 2 for albushing 3 and 'a stuffing box 4, said stufiing 'box having an adjustable gland 'held against accidental rotationV agl-atch f6 and from time to time the gland 5 may 'be adjusted to compress or re-arrange any suitable packing within.

the stuiiing box 4.

J ournaled inthe bushing 3 and the gland 5 is a drive shaft 6 which has one end thereof provided with a belt or power transmission wheel 7 by which the shaft 6 may be driven from a suitable source of power. by'

a belt or other`power transmission member. It is obvious, however, that the drive shaft 6 may be coupled direct to an electricmotor supported by the pedestal 1 or in proximity thereto so that the pumpI may be operated in a well or at some iemotepoint from a source of electrical energy. or otherl power.

On that lend of the bearing 2, opposite the stufling `box 4, is a Icircular head 8 cooperating with a detachable head or end plate 9 in supporting a pump vcylinder 10, said cylinder being sandwiched between' the heads 8 and 9 and connected thereto by screw bolts, tie rods or other fastening means.'

The shaft 6 extends axially through a cylindricall chamber 11 of the cylinder 1() and into a ushing 12 provided therefor in a bearing 13 of the detachable end plate or head 9. The bearings 13 and 2 have lubricating ports 14 so that a suit-able lubricant may be supplied to the bushings 3 and 12 by any well known means.

That portion of the drive shaft6, within the -pump chamber 11, is rectangular in cross section, and is provided with pockets 15 for coiled expansion springs 16. Mounted on the rectangularv portion of the drive shaft 6 to rotatetherewith are one or more drive rings 17 which are ecceutrically disposed on said shaft and have oblong openings 18 to receive the rectangular portion of the drive shaft. The openings 18 are of t greater area than the cross-sectional area of the shaft and opposed walls of the openings 18 engage opposed walls of the shaft so as to establish a driving relation between the rings 17 and said shaft but other walls of the openings 18 are in spaced relation to walls of the shaft so that the drive rings may shift from an eccentric relation to the shaft towards a concentric relation. The expansion springs 16 abut end walls of the openings 18 and constantly maintain'the eccentric relation of the drive rings to the shaft 6,- yet permitting of the drive rings yielding when occasion so requires.

In case ofl one drive ring said ring corresponds to the length of the pump chamber 11, but when two or ymore drive rings are mounted on the drive shaft 6, said rings are proportioned so that the pumping chamber 11 may be divided and this is accomplished by mounting one or more nonrotatable partitions 19 in the pump chamber 11. As shown in Figs. 1 and 2 there is a single partition having an opening 20 providing clearance for the rectangular portion of the shaft 6, and said partition is snugly sandwiched between the drive rings 17 and tumblers 21 loosely mounted` on the drive rings. The tumblers'21 are in the form of bands or sleeves having peripheries adapted to 'wipe Athe inner walls of the pump cylinder 10 and with the tumblers between theV tumblers and the chamber walls. i

On the pump cylinder 10 is a longitudinally disposed enlargement 20 and at its juncture with the pump cylinder said enlargement has a longitudinal bore 21 communicating with the pump chamber 11 by a slot 22. The bore 21 is divided, similar to the pump chamber 11, by extensions 23 of the partitions '19 and as illustrated the single partition 19 is prevented from rotating 1n the pump chamber by reason of its extension, he partition maybe mounted in the pump chamber from either end thereof and after being properly located the drive rings and tumblers may be assembled. Then, os-

-of the pump chamber.y Each vane is in the form of a -bladecorresponding in width to the division `of the pump chamber and each vane extends through the slot 22 and has a. barrel or tubular portion 25 loosely fitting in the bore 21 so that the vane barrel may rock in the bore and constitute a pivot for the oscillatory or pendulum like vane. The opposite end of the vane' is reci'procable in a kerf or groove 26 tangentially disposed in the tumbler 21 and to prevent air or liquid from being trapped in the inner endof the groove 26, said groove may have a small port 27 leading to the periphery of the tumbler. lVe attach considerable importance to the tangential arrangement of the vanes 24, in contradistinction to a radial relation between ythe vanes and the tumblers, as larger intake and discharge chambers are maintained in the pump cylinders: When the pump includes two'vanes, as shown,. it is preferable to arrange the pumping units in opposed relation. as indicated by 'full and dotted linesv in Fig. 2, thus providing opposed chambers whirh are receiving liquid and opposed chambers which are discharging liquid. this arrangement balancing the rotor of the pump and such balancing is more equalized as the number of pumping units is increased.

The enlargement 20* has a longitudinally disposed intake chamber 28 and a longitudinally disposed discharge chamber 29, these chambers being on opposite sides of lcillatory vanes 24 are mounted in theends' the bore .'21 and communicating with the between the chambers 28 and 29, and aseat l an adjusta for a check valve which controls such communication. The check valve is in the form of a'springy pressed plunger 35 slidable in le plugor gulde 36 closing one end of the chamber 32, and the yexpansive force of a coiled spring '37 encircling the plunger retains the plunger normally seated against a predetermined pressure of liquid in 'the discharge chamber 29, but when there is van excessive pressure of liquid in the discharge chamber the plunger 35 is unseated to ermit of the excessive liquid flowing yinto t e valve chamber 32 and the intake chamber 28 to the pump chamber 11. The

- adjustable plug 36 may be calibrated rela- 'tive tothe valve body so 'that the check valve may be set to relieve a predetermined the outlet sidev excessive liquid pressure on or head of the pump.

Considering the operation of the one-way pump, reference will be had to the diagram- 1 matic views, Figs. 6 to 9 inclusive, showing dil'erent positions the tumblers 21 may assume in one stroke or cycle, assuming that the rotor or single tumbler is turning inv In the direction indicated by the arrow. Fig. 6 the tumbler is in its uppermost position surrounded by liquid in the pump chamber 11, presenting an undivided crescent shaped body of liquid by reason of the tumbler contacting with the pump chamber wall contiguous to the slot'22. As the tumbler starts to turn in a clockwise direction, with a somewhat wiping action against the chamber wall, the body ofliquid is transferred in a clockwise direction towards the l outlet side of Jthe pump, and after a half revolution with the tumbler in the position shown in Fig. 8 the pump chamber has received liquid on its inlet side and'is continuing to discharge on its outlet side, with the vane 24 cooperating with the tumbler in providingtwo separate bodies of liquid. By reference to Fig. 9, showing a further turn of the tumbler it will be noted that more than one-half the volume of the pump chamber has been drawn in, before the discharge side of the pump chamber is completely exhausted, consequently the pump is able, as shown in Fig. 8, to eventually discharge more than one-half the volume of the pump chamber and this is obviously' due to the tangential mounting of the vane 24. This condition causes' a steady stream to be discharged which would-'not be possible were the vane radially disposed, permitting an equal volume on both sides. 'When there is an equal volume ofliquid on both sides of the vane there is a distinct and marked pulsation in the liquid as the tumbler passes the intake and discharge chambers, and suchl pulsation is entirely eliminated in our pump because of alternately maintaining intake and discharge volumes of liquid, one or the other being greater than one-half the volume of the pump chamber, in each pump unit.

The movement of the tumbler relative to the vane is slightly accelerated, reaching its maximum when the tumbler is in the position shown in Fig. 7 where pressure is greatest yand at its minimum when at the position shown in Fig. 6, where the/pressure is reduced. This isa distinct advantage, as the tumbler approaches andy makescontact with the chamber wall adjacent the portslat a correspondingly low speed, and the tumbler also approaches the ports at what may bey considered an angle .corresponding to the angularity of the vane.

The vane 24 is os'et relative to the geometric center of its pivot or hinge, and this is necessary in order to bring its uncture as close as possible to the central vertical plane of the pump. This permits of the slot 22 roo Reference will now be had to Figs.3 to

5 inclusive showing the reversible type of rotary pump and while the rotor is the same as in the one-way pump, the enlargement' `has been changed to afford a plurality of valve chambers for automatic check valves. The enlargement is designated 38 and is provided with valve chambers 39, 40 and 41, the chambers 39 and 40 being disposed in parallelism and the chamber 4l disposed at a right angle to the chambers 39 and 40 at one side or end of the enlargement. The chambers 39 and 40 have orts 42 communieating with a common out et port 43 and the ports 42 are adapted to be closed by gravity seating check valves 44. The chambers 39 and 40 have end ports 45 communicating with the chamber 41 and said ports' are adapted to be closed by check valves 46. The check valves may be conveniently in the form of `spherical bodies placed in the chambers 39, 40 and 41 through openings normally closed by screw plugs 47. Besides the chamber 41 communicating with through chamber 41 the chambers' 39 and 40 it communicates with a common outlet port 47, and the chamber 39 communicates with the pump chamber ll'by a port 48 at the inlet side ofthe pump cylinder, and the chamber 40 commu.

nicates with the pump chamber 11 by aort 49 at the outlet side of the pump cham r.-

'In operation, one of the check valves y46 and one of the'check valves 44 are normally seated when the rotor is driven in one direc- -tion; and when the rotor is driven in the opposite direction the other check valves are seated, the valves controlling the di-y rection of liquid iiow and nochange'or adjustment is necessary in connection with the f pump when it isdesi'red to reverse the operation thereof. As an instance of the operation of the check valves, oonsiderin the rotor to be turning in a counter-cioe wise direction, the valve 44 of the chamber 40 willbe unseated permitting liquid to be drawii through port 43 and port 42 into the chamber 40 and through the .port 49 into the pump chamber vwhere the liquid is forced out of port 48 into the chamber 39, the pres-v sure of liquid therein seatinflfl the valve 44 in reduced in the chamber 40.

Insane ofthe pump willbe allparent without further descri `tion and w ile in the drawings ythere are i lustrated the preferred `embodiments of our invention it is to be understood that the structural elements are susoeptible/ .to such variations and modifications as fall within the scope of the appended claim;

What we claim is 4.

A liquid pump 'comprising a chamber having inlet and outlet' ports anda bore between said ports, a artition in said chamber extending into t e bore of said pum a shaft concentricof said chambers, said s aft having a Arectan lar portion in each chamber rovided Wit a pocket, an expansion s ring 1n each pocket, a driving ring slidab e on each rectan ular portion of saidshaft and pressed b t e spring in each ket, a tumbler loose y mounted on each digging ring at each side of said partition, and a vane at each side of said artition having a tubular portion pivotally iield in the pump bore, and another portion slidable in each tumbler and actuated from a drivin ring.

In testimony whereo we aix our sign`atures in the presence of two witnesses.

. OLAF A.v ANDERSON.. Witnesses:

H. M. LdwELL, C. AfMoKnNNY. JOHN M. MACRAE. Witnesses:

WM. P. STANDLEY, G. F. CLAmrL

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