US1728620A - t tmt t - Google Patents

Description

G. LATEUR Sept, 17, 1929.

PUMP

Filed Feb. 2o, 192e 2 ,13%, Md. J f f 6L mim. @mi Wwf Patented Sept, 17, 192.9

UNITE Sii'f'd PA'lT FFICE GASTON LATEUR, OF SAN FBANCSCO, CALFUENIA, ASSIGNOR OF ONE-HALF T0 JACOB'S JOUBERT, OF HEALDSBURG, CALIFORNIA Application filed February 20, 1926.

PUMP

My invention relates to rotary pumps of the type in which the rotor thereof revolves about an axis eccentric to the axis of the casing bore.

An object of the invention is to provide a pump of the class described having movable vanes which are `arranged to be held positively positioned at all times.

Another object of the invention is to provide in a pump of the class described, means arranged to automatically cause the lubrication of the vanes in their bearings during the operation of the pump in an extremely simple manner.

A further object of the invention is to provide a device of the character described which is extremely simple in construction and involves the use of a minimum number of parts.

set forth in the claims.

Referring to said drawings:

Figure 1 is a sectional plan view of the pump taken through the axis of rotation thereof.

Figure 2 is a sectional view taken in the line 2 2 in Figure 1.

Figure 3 is a view showing an associated pair of impelling blades of the pump. g

As illustrated, the pump 5 of my invention comprises a casing 6 having acylindrical pump chamber 7 defined therein between a shell portion 8 dening the sides and parallel end walls 9 and `11. The end wall 9 and shell portion 8 are here shown formed integral, andthe former is conveniently provided with oppositely disposed perforated flange A pump in operative positionA ortions 12 for use in mounting the A A 'w end 'wall lil, it will be acted, is

to 'be rae Serial No. 89,600.

movably fixed to the shell 8, the latter being here shown flanged to provide sufficient bearing` with the former to insure therewith. Mounted for rot a tight-joint ation in the chamber 7 is a rotor 13, the axis of rotation of the latter being eccentric t o that of the chamber, but parallel therewith. The rotor,

it will be noted, comprises a 14E which presents a cylindrical symmetrically related to the r body portion outer surface otor axis and is of such diameter that some longitudinally extending portion of its concave surface will at 'all times be in such close relation to a given portion 13 of the shell wall that a flow of liquid between the rotor a tion 13 will be prevented. M

nd shell poreans are provided for supporting the rotor for rotation in its place, such means prefer ably comprising a drive shaft lll journalled in a socket 16 provided in the casing end 9 and extending through a bearing 17 provided in the casing end 11. rlhe rotor 13, it will now be noted, is preferably, and as formed as a hollow cylinder having but one here shown,

end wall 18, the latter being preferably formed with an inwardly extending hub portion 19 arranged to be keyed or otherwise removably fixed to the shaft 14E for rotation therewith.

vSince the rotory body rotates only about its own axis and so cannot in itself cause a displacement of fluid in the chamber 7, sets of like impeller blades 21 are provided thereon for 'causing such displacement of fluid.

But a given point on the rotor does not maintain a fixed spaced relation from the chamber side wall, a

body surface nd means are accordingly provided for extending and retracting the blades 21 so that their outer extremities 22 will be maintained in close proximity to the wall at all times. As here shown, such means comprises the provision of one or more pairs of diametrically disposed blades reciprocatively mounted in longitudinally and radially extending bear.- ing slots 23 of uniform width provided in the rotor, it being noted that these slots extend the full length of the outerwall of the rotor and extend radially inwardriii the end.

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The blades 21, it will now be noted are of generally rectangular shape, are of such thickness and length as to slidably engage in the slots 23 along their entire length, and are of such width radially that they may lie entirely within the slots, if and when necessary.

Since it is desirable that-'the blades 21 be at all times positively held in proper relation to the chamber wall, the blades of a pair are here shown arranged to be adjustably and rigidly heldin fixed relation by means of a connecting member 24. As here shown, the blades 21 of a pair are tapped and threaded at their inner edges 26 to receive correspondingly threaded ends 27 of the member 24, theends being preferably oppositely threaded so that appropriate rotation of the member 24 will separate the bla-des or move them together as may be desired, and a simple adjustment means between the blades is thus provided.` On account of the diametrical relation of the blades of a pair and the presence of the drive shaft 14 and/or hub 19 in their line, the member 24 is provided with an intermediate offset portion 28 which prefer-v ablyj ust clears the shaft or hub in its line 30 that when the blades ofa pair are positioned in their respective slots in adjusted relation, the presence of theshaft or hub will prevent the turning of the member 24 and the adjustment betweeny the blades will be maintainedv without recourse to lock-nuts or other fastening means.

1t will now be particularly noted that the maximum allowable distance between the outer extremities of a pair of blades will be that taken through the rotor axis in a line perpendicular vto the plane of the chamber and rotor axes,`which distance will be slightly less than the diameter ofthe bore of the pump chamber, so that when a pair of blades is positioned in any other position both blades of the pair would not contact'with the opposite wall portions of thechamber. yIt will now of course be obvious that as the rotor revolves,the pairs of blades will be appropriately reciprocated rdiametrically thereof by reason` of the contact of one blade o-r the other with the chamber wall, and that at anyvinstant, the furthest extending blade of `apair beingfurthest from its center of rotation about the rotoi` axis, will be urged outwardly by the excess centrifugal force acting thereon and therebymaintain its contact with` the chamber wall. Such positioning of the outermost blade, it will be noted, is materially assisted by the alignment of the pair` of slots occupied by a blade pair, since the blades cooperate in an obvious manner to prevent binding of either in their respective `slots as they move therethrough. Should it be thought desirable that the centrifugal force be not depended upon to assist inmaintaining the seal of the blades with the chamber wall, it will be obvious that the curvature of the latter could be decreased at the portion opposite the shell portion 13 to thereby draw the wall inwardly into the path which would be taken by a blade if centrifugal force were not acting.

1t will now be noted that the space 31 defined within the rotor is designed to serve as an oil reservoir for effecting the lubrication of the blades as they move through `the slots as well as the lubrication of the shaft bearings, and the space 31 is accordingly desirably rendered as oil-tight as possible with respect to the chamber 7. As here shown, the ends 9 and 1l of the casing are provided with annular grooves 32 in which co operating annular extensions 33 extending longitudinally from the ends of rotor are arranged to slidably fit. A packing gland 34 may also be provided about the shaft 14 at its point of exit from the plate 11, while the shaft portions engaged in the bearings may, if desired, be provided with oil grooves leading outwardly from the space 31. Oil is here shown arranged to be inserted in the space 31 by means of an oil pipe 36 tapped into the casing end 11, such pipe being arranged to have an oil cup or oil gauge` fixed thereon as maybe desired. 1n this manner, complete oil lubrication of the rotor parts is assured at all times, thus eliminating what has heretoforeproved a serious problem in pumps of the type herein described.

'1t will now be noted that inlet and outlet ports 41 are provided in the casing at opposite sides of the chamber portion, and since the structure is symmetrical, the pump will operate equally well upon rotation in either direction. The pump may be actuated in any suitable manner.l As here shown, a pinion 41 is provided on the shaft 14, such pinion being engaged by a. gear 42 fixedly associated with a pulley 43, the gear and pulley being revolubly mounted on a stub shaft 44 extending from the casing end 11.

When, as shown, more than one pair of blades is installed in the rotor, it will be obvious that the connecting members 24 of different pairs must be arranged to cross the shaft at longitudinally spaced points. It will now be obvious that the assembly of the pump involves the handlingof a minimum number of parts, and that the removal of the various pairs of blades may be readily effected after removal of the pinion 41 from the shaft, followed by the removal of the end 11 from the casing, so that adjustment may be made with the rotor in position.

I claim n l. In a Huid pump, a casing having a `cylindrical inner wall and provided with opposed inlet and outlet openings, a rotor mounted in said casing in eccentric relation thereto and arranged to maintain a substantially tangent relation to the wall at a point between said openings, a pair of diamettiti rically disposed impeller blades mounted on said rotor and arranged for diametral reciprocation with respect to said rotor, and a member directly and threadedly engaging said blades for holding them in fixed spaced relation to each other.

2. In a fluid pump, a casing having a right cylindrical chamber defined therein, a hollow cylindrical rotor eccentrically mounted in said casing, a shaft journalled in the end Walls of said chamber on which said rotor is arranged to be fixed for axial rotation therewith, a pair of diametrica-lly disposed impeller blades mounted for slidable reciprocation into and out of said cavity through opposed radial guideways extending through the wall of said rotor, and a member t'hreadedly engaging said blades whereby they may be adjustably held in fixed spaced relation to each other.

3. In a fluid pump, a casing having a right cylindrical chamber defined therein, a hollow cylindrical rotor eccentrically disposed in said casing, a shaft extending through said chamber and on which said rotor is arranged to be fixed for axial rotation therewith, a pair of diametrically disposed impeller blades mounted for slidable reciprocation into and out of said member through opposed radial guideways extending through the wall of said rotor, and a member connecting said blades arranged for oppositely threaded engagement therewith and having an intermediate portion thereof offset around said rotor shaft, said portion and shaft being-arranged to cooperate to prevent the rotation of the connecting means.

In testimony whereof, I have hereunto set my hand at Oakland1 California, this 5th day of February, 1926.

GASTON LATEUR.

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