US1211457A - Pumping mechanism. - Google Patents

Description

M; E. LAYNE.

PUMPING MEGHANISM.

APPLICATION FILED SEPT. 29. I9I4.

Patented Jan. 9,1917.

INVENTOR 3l /MMM rLMy/cu/ ATTORNEYS LON E. LAYNE, or HOUSTON, v :r

rmnrrne nner-ramen.

To all whom t may concern: l

Be itv known that l, MAnLoN a citizen of the Unitedv States, residing at Houston, in the county of Harris and State of Texas, have invented certain new and use- ,ful Improvements 1n Pumping Mechanisms,

of which the following is, a specification.

The invention relates to pumping appara? tus, and particularly to apparatus involving" the use of a rotary -Orcentrifugal pumpy operated by an inclosed line shaft supported by bearings and requiring lubrication.' v The primaryobject of the invention isthe provi-y sion of means wherebythe leakage of oil' from the inclosed line shaft and into the pump casing isprevented `when the pump is not running, thus conserving the oil and pre# venting the water from being charged with oil when the pump first starts'. Certain ern.l

bodiments of the invention are illustrated in the accompanying drawings whereinf- Figure 1 is a vertical section through a pump mechanisml suppliedI with my improvement, Fig. 2- isan -enlargeddetail tion taken at -the stuiingQbolxin-'thepump casing, Fig., 3 is a plan viewy of the" checkvalve member below thefpum'p casing, and

Fig. 4 is ran enlarged detail section of ajmodifp cation of the structure of Fig.A 3.

'ln the ordinary centrifugal .or rotary.

pump construction for use in lifting. a supply of water tothe surface of the groundl for irrigation or otherpurposes, the drive shaft is supported in what is lmown as a'shaft casing, which' extends from' the pump to the surface ofthe ground,l and provides, not

only for thesupport of a plurality ofv bear-l ings for the shaft casing, but also constitutes a conduit whereby lubricant supplied to the upper end of the casing is conducted to the various bearings along the shaft and to the upper bearing inthe pump casing. This lubricant is fed downward b gravity, and'by -the suction produced in' t e pump by the runners, so that Awhile the pump is v Pump running these various bearings are supplled with the proper amount of oil, such oil being eventually discharged into the water in the pump casing and carriedto the surface vof the ground with it to the discharge casi' ing. When the pumpis stopped and the water in the discharge casin and'pump cas-; ing runs back to the suction 'pipe vof the pump, there is nothing to prevent the lubricant, of which several feet may have collected at the bottom of the shaft casing, from' Specification ofi- Letters latent. 1

atenten aan. o, iat.

aannemen inea sebtber 2e, 1914. senfamLetaoae.; t

graf'dually'- leaking' down into I the caslng, so that a largeguantity of oilis wa well ischai'gedf with". this large quantity-k of `oil,".whieh is olijlectionableflt is the pur,-

pose of my invention to do awayv with this loss'of oil when vvthe pump is not running,

by the provisionoffmeans which will stop the downward discharge .:of vthe: lubricant duringthe periods of rest, while atthe same time permitting the proper downward feed of oil as. heretofore described when the pump 1s running.

Referring to the drawings, the 'principal vpartsof the apparatus illustrated in Fig. l,

maybe enumerated as followsf l is the outer casing of a twostage Frotaryfpurnp provided with the sets of runners 2 and 3 se.- cured for rotation. tothe pump shaft e; 5 is the discharge casing of the 'pump leading to` the surface of the groundand discharging the water fromthe pump through the outlet vthe shaft casing 7 v;.an'd 11 is the suction pipe end of the pum casing. v `Just below t e bearing-12 the pumpcasingfis the. stuffing .boxv illustrated in enlarged detail in Fig. '2, such 'stuffling box comprising the collar 13 secured to :and when the pump ystarts the water ofthe' of the pump, such pipev leading to the lower in the neck'of the shaft by means of the set screw 145 and f a glandy 15'*beneathwhichpacking is pro; 5

vided in order to prevent thepassage of water alongthe shaft'll. Slidably and loosely mounted von: the shaft 4c`beneath1the v collar' i 13 is a second collar 1.6, to thelowersurface of'which is secured a diaphragm 1 7, which serves to'divide the space in tliepump 'cas-v ,ingbeneaththe bearing 12 into twochamybers-18 and '19. The collar'lfcoperating with the collar-13 acts substantiallyas a Icheclr'valve, and when the parts are in the position indicated in Fig. 2, the passagev of 'fr liquldfrom theA chamber 18 .to the chamber 19 fis prevented.v 'On the other hand, when thecollar 16 is moved .so that lts upper surthen a free passage is afforded along the Ashaft from vthe chamber` 18 tothe chamber 19; lItwill be seen that when the collar 16 Aface does not contact with the collar 13,'

l i`s held up against the collar 13 in the position indicated in Fig. 2, the ydownwardiow I ofA oil :from the shaft casing 7 and from the chambe'rl is prevented. The means where-` by this engagementbetween the two collars is e'ected whenlthe pump stops will now be described. Q, 1 l

Located intermediate the lower end of theV pump casing land the .'upperfe'nd of the suction pipe 7 is acheck valve coupling 'member 20, such member being provided with a number of perforatons as indicated in Fig.' 3, 'suchA 'perforations 'being provided with sleeve members- 21 carrying lbolts Intermediate the heads of theLbolts vand theA sleeves 21. are the check valves 23 yieldingly held in positionbythe springs 24. The type of' check valve 'employedis immaterial, as

'any other type of check' valver permitting the upward passage :ofthe waterbut preventing its reverse movementmay be em- 1 ployed, The purpose of lthis cheek valve f e(instructien at the lower end of'. the pump casing, is to provide fora hydrostatic head l i in thel pump casing fand the4 discharge cas` ing 5 suicienttooperatethecheck valv`e16 i. j when the pump is stopped.

When the pump. 1s 1n operation, the check vl`valve 16 and thecheck valve 23 dol'not a'ect -either thefow of the water to theA pump casingon'the'feed-of the' oil to the discharge casing to. any. appreciable extent.' The rota tion of the runners produces a suction adjacent the 'shaft casing so that thev liquid in the chamber 19 beneath the diaphragm' 17 ,is fed downwardly and mixes with the water -as 1t vdischarges upwardly through the pump cas:-

fing. 'J'lhe pressure on the lower lSide of the from the upper side of the diaphragm to they lower side. ,A continuous feed of oilv'fromt` diaphragm 17 is thusless than on the ilpper side, and' as a result the collar 16 vv1s held 1 with its upper face separated from the lower- `iiace of the collar 13, thus permitting a flowl the shaft casing and along the bearing 12 is thus provided for. When however, the' operation of the runners is stopped, the im provement heretofore described and mvolvthe discharge casing 5. -A considerable wa# t ing the two check valve devices comes into play. At this time thecheck'valve 23 below the pump casing c oses, thus trapping the water thereabove in the pump casing and 1n 'ter pressure is thus'secured in vthev pump capsing, and, due to the loose fit of the drive shaft 4 and lits bearings, this pressure 1s l communicated 'to the chamber 19 below the wasted while the 4pump is not inoperation and when the pump-does start there is no` the further additional 'advantage that'when thepump' starts up again, the lwater immediately begins to How from 'the'outlet 6 since the water 1n the casing extends almost to this lqevel when the pump `is started.

The check valve co'lpistructionl illustrated in Fig. 2 is only one of'a number which mightbe employed. Fig. 4 illustrates a slightly difierent construction in which a piston with a cup leather is substituted for the diaphragm 17 of the'construction of Fi 2. ln this construction of Fig. 4 the stu ng box member 13 is the same as in the other construction,

andthe member 16"'corresponds to the collar 16 of Fig. 4, such member 16 tting loosely upon the pumpshaft 4 as in the other construction', The member 16 reciprocates ,in the cylinder 25 and a cup leather26'is'em# ployed to prevent a passage of liquid from 'one side ofthe member 16 to the other, when the parts are in the position of Fig. v4. This cup leather is clamped in position by means of the collar 27, forced up by the nut 28. lit

willbe understood that the hydrostatic head as secured by the use of the check valvesbeneath' the pump casing would be more or less eiective to prevent a downward flow oi? oil without the oil check valve, and that the oil check valve might be held yieldingly in closed lposition by. other means aside from the employment ofthe hydrostatic head, it

so desired, my invention being of relatively broad scope` with respect to these features, and not limited to their employment in conjunction, although this is preferable.

stub shaft 29 is screwed to the central portion of the check valve coupling member 20, having its upper end projecting above the support' to receive the lower end of the pump runner 3, which is provided with a cup i .shaped bearin 30 fitting over the projecting end of the stu shaft. rlhe stub shaft' serves to hold the pump shaft and runners properly centered, and is lubricated by oil sup- Aplied through the pipe 31. extending from ,the top-of the wall and connecting with the voil passage 32 bored in the stub shaft 29. This passage supplies oil tothe upper end of the' stub shaft, thereby thoroughly'lubrieating all wearing surfaces of the'y bearing.

A valve 33 neer the bottom of the iii-P631, operated by the wire 34 extending' to the top of the well, controls the .supply of oil necessary for the bearing. Because the bearing bushing .3D-s elo/sed et the top and iS in the form'of an inverted cup, regardless of the. Water pressure no; water can be forced upward between the 'Stub (shaft and the bushing while there is o il lubricating the bushine', and therefore no vSand in the surwundiing waefa'ener'-1re bushing. 'rie ne e@ of the bushingis considerably increased by such construction.

WhatI claim is:

41. In combination, a pump casing, run-v ners therein, a shaft for rotating the runv ners, a shaft casing provided with bearings for the shaft and adapted to carry a supply of lubricant, a discharge casing leading upward from the pump casing, and a check valve held closed when the runners are not rotated and adapted to prevent a flow of lubricant from the shaft casing to the pump casing below the valve at such time.

3. In combination, a pump casing, runners' therein, a shaft for rotating' the runners., a' shaft casing provided with bearings for the shaft and adapted to carry a supply of lubricant, a discharge casing leading upward from the pump casing, a check valve exposed on one.side to the pressure of the l oil in the shaft casing and on the other side to the water' pressure in the pump casing, c

and a second check valve for preventinga back fiow of water through the pump casing when the rotation of the runners is stopped whereby a head of water is secured at such time suiiicient to maintain the first mentioned check valve closed.

4. In combination, a pump casing, ners therein, a shaft for rotating the runners, a shaft casing provided with bearingsfor the shaft and adapted to carry a supply of lubricant, a discharge casing leading up- Ward from the pump casing, and means, including a check valve f orv preventing a back ow of water through the pump casing for maintaining a head of water in the discharge casing, when the rotation of the runners is stopped, suiiicient tol counterbalance the head of oil in the shaft casing and prevent a down How of oil at such time. v

5. lIn combination, a pump casing, runners therein, a shaft for rotating the runners,. a shaft casing provided with bearings for the shaft and adapted to carry a supply of lubricant, a discharge casing leading upward from the pump casing a bearing for the shaft at the upper end of the pump casing, acallar secured to the shaft below said bearing, a second* collar loose on the shaft and adapted when held against the first collar to act as a check valve, means coperating with the second collar .for separating the space in the casing` above`such collar from the space in the casing therebeneath, and

.means whereby the second collar is made to contact with the first collar when the runners' are not rotated.

6. In combination, a pump casing, runners therein, a shaft for rotating the runners, a shaft casing provided with bearings 'for the shaft and adapted to carry a supply of lubricant, a discharge casing leading upward from the pump casing, a bearing for the shaft at the upper end of the pump casing,

a collar secured to the shaft below said bearing, a secondl collar loose on the shaft and adapted whencheld against the first collar to act as a check valve, means coperating with the second collar for separating the space in the casing above suchcollar from the space in the'casmg therebeneath, and a' check valve below the runners for preventingl a back iow of water -through the pump casing when the rotation of the runners is stopped.

In testimony whereof I have hereuntol signed my name in the presence of the two subscribed witnesses.

MAHLON vIll. LAYNE. Witnesses: i 'I Ancnwon'rri MARTIN, J ULIAN H.v KENDIG.

so f

Images