US1272681A

US1272681A - Pump mechanism.

Info

Publication number: US1272681A
Application number: US11001216A
Authority: US
Inventors: Mahlon E Layne
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-07-19
Filing date: 1916-07-19
Publication date: 1918-07-16
Anticipated expiration: 1935-07-16

Description

NI. E. LAYNE.

PUMP MECHANISIVI.

APPLICATION FILED IULY I9-, I|9I6. 1 ,272,68I Patented 31113716, 191s.

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Nl. E. LAYNE..

PUMP MECHANISM.

APPLICATION FILED, IuLY I9. 191e.

1 ,27 2,68 l Patented July I6, 1918.

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Patented my 16, 191s.

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M. E. 1mm-g. PUMP MECHANISIVI.

APPLICATION FILED JULY I9. ISISy l ,2?28 1 Patented July 16, 1918.

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MAHLON E. LAYNE, F HOUSTON, TEXAS.

PUMP MECHANISM.

Specification of Letters Patent. Patented July 16, 1g18 Application led J' uly 19, 1916. Serial No. 110,012.

To all whomz't may concern:

. Be it known that I, MAHLON E. LAYNE,

a citizen of the United States, residing atl the pump stock castings 14, which are provided with` discharge passages, and between whlch the runners-or impellers are lo- I Houston, in the county of Harrisand State seated; and the tubing 13 which connects the of Texas, have invented certain new and useful Improvements 1n Pump Mechanism,

Aof which the following is a specification.

This invention relates to well pumps, and has reference particularly to pumps and to the means for lubricating and protecting -the same. Theprincipal objects of my invention are: the provision of an improved means for lubricating the pump; the provision of means for equalizing pressure conditions on and about" the various bearings in order to prevent water passing through the bearings; and the provision of means whereby the bearings are protected from sand and other foreign substances.

The foregoing, together with such other objects as may hereinafter appear or are incident to my invention, I attain by means of a construction, certain embodiments of which I have shown in the accompanying drawings, wherein Figure 1 is a sectional view taken through a well and showing the general arrangement of the pumping apparatus therein; Fig. 2 is an enlarged side elevation of. a multi-'stage pump such as-shown in Fig. 1; Fig. 3 is a vertical section taken through the pump; Fig. 4 is a sectional view of one of the novel features of my invention; Fig. 5 is an enlarged showing of certain of the details of the pump; Fig. 6 illustrates a modification of the structure of Fig. 3; and Fig. 7 is a partial vertical section through a modified form of pump embodying my invention.

Referring to Fig. 1, it will be seen that I have therein shown a deep Well pump apparatus, the pit of the well being designated by the numeral 7, the well casing by the numeral 8, the lower portion 9 of the casing being perforated in the water bearing strata. Suspended from the framing 10 is the discharge casing 11, which is comprised of a lurality of sections suitably joined together. he pump proper, which is of the multistage type, is indicated by the letter A, a portion of the pump being shown on an enlarged scale in Fig. 3. From inspection of this figure and also of Fig. 2, it will be noted that the pump casing is secured to the discharge casing 11 by means of a neck casting 12. The pump comprises the pump runners or impellers 15, keyed to the stub shaft 17;

castings. Certain of the stages are suitably spaced apart by providing one or more of the castings 14 with a long neck 16, or by some otherform of spacing means. The discharge p/assages connecting these stages are formed in the

parts

14, 16, and 15a, the last preferably being an extension of the runners 15, next above. This extension 15 dependswithin the neck 16 and rests upon the top of the corresponding casting 14, the lwer edge being notched to provide the passages 19 for the purpose hereinafter stated.

In order to properly maintain the alinement of the stub shaft during operation, I provide a bushing 18 which has an outside bearing on the extension 15a and is threaded into the stationary casting 14 of which the neck 16 forms a part. The bearing is 1ubricated by means of a pipe 2O leading from the surface of the ground and connected as indicated in Fig. 3 to the passage 21 in the bushing, a space being provided above the upper end of the bushing so that the oil may penetrate both to the inside and outside surfaces of the bushing. The runner 15 above the bushing preferably fits the shaft, with such tightness that no leakage can occur upward between the runner and the shaft. The lower end of the bushing is provided with a series of passages 22 (Fig. 5) so that substantially the same water pressure is appliedy to the bea-ring surface between the bushing and the shaft and the bearing surface between the bushing and thc vextension or housing 15a,

The purpose of this arrangement is to equalize the pressure at the .bearing surfaces inside and outside the bushing. With a centrifugal pump there is a tendency to produce a slight suction at the point marked 15b (Fig. 3) between the lower surface of the casing member 14 and the upper surface of the runner 1 5, while in thepassage between the runners or impellers and opposite the passages 19, there is a substantial pressure so that if the passages 22 were not provided there would be a tendency of the water to How in at the passages 19 upward between the outer surface ofthe bushing and the inner surface of the extension or housing 15, and then downward along the shaft. This circulation would necessarily carry in since the pressures at lthe two bearing surfaces ofthe bushing are equalized. `The in-j vilow of oil through the passage 22 and to 'the bearing surfaces ofthe bushing alsov tends to keep out-the water and foreign substances.

The bushing also serves to protect the.v

A bearing surface between the casing member provision of the bushing not only blocks 14 and the shaft 17 which turns in such casing member. Heretofore the casing member and shaft have worn'rapidly at this point because of the eXposureto sand and Water; and because of the circulation tendency along the shaft heretofore referred to. The

this circulation, but protects the bearing in the casing member 14 in another way, and due to the Ifact that the bushing 18 assumes the work of supporting thel shaft. The bearing work between the shaft and casing member 14 is therefore reduced to a minimum and the Wear correspondingly reduced.

. It will of course be understood that. this bushing construction may be used in pumps having anynumber of impellers and having anytxnumber of 'stages wit the proper number'of bearings, the construction of Fig. 3 and those of Figs. 6 and 7 being merely illustrative of a number of the applications of the invention'which is of broad scope, as will be apparent by reference to the claims. My invention also contemplates theuse of the construction, wherefeasible, in other relations aside from pump constructions.

The manner of supporting the length of the pipe 20 is shown in Fig.`4, in which fig-y -ure is also shown the arrangement of the pump shaft 17, the bottom section of which is the stub or runner shaft 17. The pump shaft comprises a plurality of sections, connected by threaded collars 23, which are supported on bearing blocks 24 arranged at corresponding intervals. The blocks 24 are supported in the jointed shaft casing 25. The shaft casing excludes the Water and sand during operation and thereby protects the shafting and bearings; it serves as a support for the bearings, thereby preventing whipping of the line shaft; and it serves as a means for lubricating the bearings, the oil being admitted at the-top through the pipe 26, and working down from bearing to bearing to the pump neck.

Fig. 6 illustrates a modification of the inventionwherein the housing member 27 corresponding to .the extension or housing 15a, is made separate from the runner 28 immediately above. course keyed to the shaft 29 so that it turns with it, and the function accomplished is the same as in the construction of Fig. 3, the latter construction being preferred be- The housingis of cause .itis a simpler and'more desirable construction to make vthe runnerv15 and ex tension 15a in one piece. .Thebushing 30 is y other form of construction. The construction in other respects being the same as Fig'. 3, no further description is necessary.

Fig. 7 illustrates the application ofthe invention to a different type of pump useful for other purposes and particularly adapted for minedrainage or city-water works or. other locatlons where there is room to admlt cf this structure. The hydraulic loadl in vvthistype of Aconstruction -is balanced. Bal# f anced constructions of this general type are old,`kbut my invention `as applied thereto 'is new and my constructioneliminates the vnecessity for usinga stuiiing boX between the stages as has heretofore been the case,'1v

the bearing 34; 39.is the. passage leading from the lower set of impellers to the upper set of impellers; 40 is the discharge passage leading from the Iimpellers 38; and- 41 is the oil supply pipe which leads to the passage 42 in the bearing 34. The runners 38 are provided With the extension or housing 43 bearing upon the `outer surface of the bushing or bearing 34 and the pressure on the inner and outer surfaces of the bushing or bearing 34 are equalized by means of the passages 44 correspondingto the passages 22 in the'construction of Fig. 3. seen that the function and utility of the construction as applied to this type of vpump is the same as that in the construction of'Fig. 3, and that the bushing orbearing acts as l a stuiiing box between the upper and lower sections of the pump. The arrows indicate the path of the water through the pump .avoided by omitting the lubrication even though the utility is considerably lessened.

I claim:

1. The-combination in a centrifugal pump l' having a plurality of stages, of a bearing for the driving shaft of the pump located between stages, said bearing being providedare the runners secured to the shaft 324 above It will be with means for substantially equalizing the pressure on the inside and outside of said bearing.

2. The combination in a centrifugal pump having a plurality of stages, of a casing member between stages, a driving shaft, a

vbearing for the driving shaft carried in said casing member and extending within the rotating part of one of the stages and means for balancing pressure conditions around said bearing.

` ing lying in 3. The combination in a centrifugal pump, of a pair of impellers, a casing member located therebetween, a driving shaft for said impellers extending through the casing member, a bushing mounted in said casing member and providing a bearing for the shaft and a bearing for one of the impellers, and means for balancing Pressure conditions around 'said bushing.

4. The combination in a centrifugal pump', of a pair of impellers, a casing member therebetween, a driving shaft for said casing member providing a bearing *for the giving access to the inner and ter pressure in the pump lubricant to the end of the bearouter surfaces of the bearing at a point relmote from the end of the bearing in the said rotating part.

6. The combination in a centrifugal pump having a plurality of stages land impellers spaced apart, a drivingshaft carrying the impellers, a relatively fixed casing between the impellers, a bushing mounted at one end in the casing and surrounding the shaft, a housing member mounted to rotate with the shaft and fitting over the free end of the bushing, and means giving access of substantially the same water pressure .in the pumpto the inner and outer bearing surfaces of the bushing. 1 A

7. The combination in a centrifugal pump having a plurality of stages and impellers spaced apart, a driving -shaft carrying the impellers, a relatively fixed casingl between the impellers, va bushing mounted at one end in the casing and surrounding the shaft, a housing mel ber mounted to rotate with the Vshaft and fitting over the free end of the bushing, and means whereby the water pressure on 'the inner and outer surfaces of the bushing are balanced, thereby 'preventinga circulation of fluid along the said surfaces. f

8. In a centrifugal pump the combination of a pump casing, a rotary shaft mounted therein and provided with one or more impellers, a bearing for the shaft adjacent the impeller element having an end open and provided with means for equalizing pressure on the outside ing.

A "f oNE. LAYNE. A

and inside of said bear-