US1307115A - chapman - Google Patents

Description

IVI. T. CHAPMAN.

ROTARY PUMP.

APPLICATION FILED APR. I9. 1915.

Patented June 17,1919.

2 SHEETS-SHEET l.

' asoman.

- MATTHEW T. CHAPMAN, OF AURORA, ILLINOIS.

' ROTARY PUMP.

Specification of Letters Patent. Patentd Jun@ jl?, @9119s Application'led April 19, 1915. Serial N o. 22,361.

To all'wwm it may concern:

Be it knowngthat I, MATTHEW T. CHAP- MAN, a citizen of the United States, residing at Aurora, in the county of Kane, State of f Illinois, have invented certain new and useful Improvements in Rotary Pumps, of which the following is a specification, reference being had to the accompanying draw-` ings.` -Myinvention relates to rotary pumps and of new and improved means forprotecting the bearings zof the pump shaft from the sand and vgritpumped up with the water.

" fiXedly secured in position in any suitable manner at or near the top of the well. Se-

- cured to the water-discharge headlOfand rising therefrom isa stationary frame 11, upon a sleeve 12 at thelupper end of which, 1s revolubly mounted'apulley 13, the lower end of which pulley extends down about the upper end of the frame 11. An anti-friction bearing 14 of any suitable type is inter- 'it has for its principal object the provision Asis well recognized in the pump art, when the bearings 'of the rotary shaft are -open to .the Vwater being pumped and no protecting means is provided for preventing the entrance f sand and grit into the bearings, the bearings very soon become seriously worn and cut out so as to very materially decrease 4 the efficiency of the pump. It is one of the specific objects of my invention to' provide protecting means for the bearings of a pump shaft involving means for forcing clean water under pressure from the bearings, thus preventing the entrance of the dirty water beingpumped, this being accomplished without the use of such a shaft' inclosing-casing as is very often used for this purpose. It 1s.

another.object of my invention to provide a new and improved form of bearing b'y the 'use of which I am enabled to accomplish myl objects. Itis another object of my invention to improve devices of this type in sundry details hereinafter pointed out. The preferred means by which I have accomplished my objects are illustrated in the accompanying drawings and are hereinafter specifically described. i That which I believe to be new `and desire to cover by this application is set forth in the claims.

In the drawings Figure 1 is a 'central vertical section through the apparatus at the top of the well;

Fig. 2 is a horizontal cross-section taken substantially on line 2-2 of Fig. 1;

Fig. 3 is a central vertical section throughI thewater-raising elements down in the well; an

Fig. 4 is a central vertical section through a modifie-d formof shaft bearing. if

Referring to Figs. 1 to 3, in which correspending parts are indicated by the same reference characters,-

10 indicates the water discharge head posed between the sleeve 12 and the hub of the pulley 13 adapted to receive the side thrust of the pulley upon the frame, and an anti-friction bearing 15 of any suitable type is interposed between the hub of the pulley Aand the frame 11 adapted to support the weight 'and to receive the down thrust of the pulley 13 `and its connected parts. The sleeve 12 is out of contact with theshaft 16 which is keyed in the hub of the pulley 13, whereby the anti-friction bearings la an 15 lare adapted to be the entire' supphrt o Y the pulley and the shaft upon the frame 11. An anti-friction thrust bearing 1Gb is adjustably supported on the shaft 16 by means of a collar 16c held in position by a suitable set-screw, said thrust bearing being adapted to limit the upward movement of the shaft relative'to the frame 11. A flange l17 is secured to the upper end of the frame 1'1 about the anti-friction bearings 14.--15, providing a receptacle for a suitable lubricant for said bearings, a gage 18 of any suitable type being connected with said receptacle for showing the height at which the oil stands there yposition relative to the pulley and to the frame 11, as will be readily understood.

' Depending from the water discharge head r 10 is a pump casing or water discharge casing 20 composed of a plurality of'sections suitably joined together, as hereinafter described. The uppermost pump casing section 20 is secured to the water discharge head 10 by means of a ring 21 securedby means of screw-threads upon the upper end of the section 20, said ring being secured to the head 10 by means of a plurality of bolts 22. Connected to the -head 10 by means of screwthreads and extending to one side therefrom is a water discharge pipe 23. A packing 24 of any suitable type is held by an adjustable gland 25 in position in the upper wall ofthe water discharge head 10 about the shaft 16` The lower end of the lowermost section of the pump casing 20 is connected by means of a collar 26 and bolts 27 to the upper end of a runner head 28. A bearing sleeve 29 for the shaft 16 is carried by the head 28, being held in central position therein by means ofbri'bs 30. Secured in anysuitable manner below the runner head 28 are a series of runner casings 31 in which runners 32 feathered upon the shaft 16 are adapted to rotate. rPhe runners are spaced apa-rt from each other by means of sleeves 33, and the lowermost runner 32 is adjustably held in position upon the shaft 16. by means of lock-nuts 34-35 secured by means of screwthreads upon the said shaft. Connected to the lowermost runner casing 31 by 'means of bolts 36 is a bearing head 37, supporting, by mea-ns of ribs 38, a bearing sleeve 39 in central position relative to the head 37. A collar 40 embracing the upper end of the bearing sleeve 39 is feathered upon the shaft 16 above the bearing sleeve 39, being held yield ingly in position by a spring 41ibearing at its upper end against a. collar 41b fixed on the shaft. A suction pipe 42 is secured by means of a collar 43 and bolts 44 upon the lower end of the bearing head 37, the suction pipe 42 being adapted to extend down into the well to the limit of the suction power of the runners 32 so as to prevent the pump from sucking air as the level of the water is lowered in the well by the action of the pump.

I have provided means similar in a general way to that shown in my application, Serial No. 16,101` filed March 22, 1915, for forcing a limited amount of water downward for lubricating and washing out the bearings of the pump shaft. This means comprises a. runner 4 5 slidably mounted upon the shaft 16 adjacent to the upper wall of a runner casing 46 which is suitably supported from the water discharge head 10. Suitable packings 47-43 are secured about the shaft 16 above and below the runner 45, respectively, and two nuts 45" serve to limit the upward movement of the runner relative to the shaft. A feed pipe 49 is connected to the upper end of the runner casing 46 above the runner 45, from which it extends into suitable position near the bottom of a water tank 50, being provided with a strainer 51 of any suitable type at its lower end. Another pipe 52 opens out of the pipe 49 being providedwith a stop-cock 53 intermediate its ends and having a funnel 54 mounted upon its upper end. A discharge pipe is connected with the casing 46 'below the runner 45, a screen or strainer 56 of any suitable type being interposed between the runner 45 and the upper end of the pipe By a. suitable adjustment of the nuts 45h, the runner 45 may be adjusted vertically upon the shaft to bring it into proper position relative to the casing 46 without. disturbing the adjustment of the lower runners The lower end of the pipe 55 communicates with an annular opening 57 formed in the inner face of the bearing sleeve 29 near the upper end of the said sleeve. From the annular chamber 57 the water which -is forced downward through the pipe 55 by the runner 45, as hereinafter described, passes through a suitable hole 58 extending through the lower end of the shaft 16, or through a pipe 59 to an annular recess 60 formed in the inner face of the lower bearing sleeve 39. From the annular recess 60 the water passes upward along suitable spiral grooves 61 formed in the outer face of the shaft 16 for lubricating and washing out the said bearing as is set forth yin my prior application above referred ,.to, the water being adapted to escape from the annular recess 62 between the collar 40 and the sleeve 39 by seeping through the bearing between the collar 46 and the sleeve 39, the collar 40 being adapted to yield against the action of the spring 41. Thewater from the annular' recess 57 also passes downward along the spiral grooves 63 for lubricating and washing out t-he bearing of the shaft in the sleeve 29, the water thus passing down the shaft being adapted to escape through the ducts 64 extending diagonally downward through the hub of the uppermost runner A ring 65 is loosely mounted in an annular groove 65b in the lower end of the bearing sleeve 29, said ring being adapted to rest upon the uppermost runner 32.

A packing 66 is mounted in the upper end of the sleeve 29 about the shaft 16, a spring 67 bearing'at its upper end against a collar 63 adjustably mounted upon the shaft 16 being utilized for holding the gland 69 yieldingly in position, a collar 67b feathered on the shaft 16 being interposedbetween the spring 67 and the gland for taking the wear.

The adjacent sections of the water discharge pipe .20 are connected together by means of collars 70-71 which are mounted by means of screw-threads upon the ends of said sections, said collars beingsecured together by means of bolts 72. The inner faces of the. collars 70-71 are rabbeted out. to provide an annular space for the reception of a collar 73 which is connected by means of radially-extending ribs 74 with a bearingl sleeve 75, in the construction shown, the collar 73, ribs 74 and sleeve 75 being formed integrally with each other, The inner face of. the bearing sleeve 75 is provided with an annular recess 7 6 which is connected with the pipe 55 by means of a short laterally-extending pipe 77. Packings 78 and 79 are mounted in the ends of the sleeve 75 on opposite sides of the annular recess 76.

lVhen it is desired to start the pump in operation, the valve 53 is opened and a supply of escaping into the tank 50. The water enters the casing 46 and passes thence through the pipe 55 to the several bearings 75 in the line of shafting,-serving to lubricate such bearings. A `part of the water also passes down' to the, bearing sleeves 29 and 39 for lubricating` those bearings. After the bearings of the shaft have been suitably moistened, the valve 53 is closed and power is applied to the pulley 13 by a belt or in any other suitable manner for rotating the shaft- 16 and theseveral runners mountedupon the shaft. The runner 45 operates in precisely the manner described in connection with` my former application above referred to, causing water to enter the easing 46 through the pipe 49, which water is forced outward along the upper wall of the casing 46. rlhis runner is smooth on its under side to avoid centrifugal action.. The pressure on the upper side of Y said runner or impeller increases from the centrifugal vanes fixed' on the upper' side thereof, while the pressure on the smooth under side is uniform and equal to that at the rim of the runner or impeller. An unbalanced upward pressure is thereby created. By reason of casing 46, and by reason of the fact that the amount of water forced downward by the runner 45 is very much less than the amount of water normally adapted to be pumped by a runner of this size rotated at a similar speed, a very considerable pressure is eXerted in the casing 46 upon the under face of the runner 45, serving to relieve from the thrust bearing 15 a very great proportion of the weight of the shaft and of the column of `water raised by the runners on the shaft.' ln case the upward pressure upon Vthe shaft is suiiicient to lift the shaft, the anti-friction bearing 16b serves to limit the upward move- -ment so as to prevent the runners 45 and 32 from being moved into frictional engagement with the runner casings. The water which finds its way 'through the -pipe'55 to the annular recesses 76 of the bearings Z5 lhub to the rim, caused by the rotation of the grooves isforced by the screw action of the grooves toward the runners 32.

1n Fig. 4, which shows a modified' form of' bearing for the shaft, the parts which correspond to the parts of the structure hereinabove described are indicated by the samereference characters, but with the addition of an exponent a. 1n this ligure, the bearing sleeve 80 is used provided with an annular recess 81 to which the pipe 77a is connected for conducting water thereto from the pipe 55a. The ends of the sleeve 80 are at right angles relative to its length so as to have a square bearing engagement with collars 82-83 feathered upon the shaft 16a' adjacent thereto. Springs 84.-85 are interposed between the collars 89.-83 and collars 8f3-87,

' respectively, which are adjustably secured in position upon the shaft 16a.' The springpressed collars 82--83 serve as metal packing members, the springs 84 and 85 being adapted to be tightened as desired for obtainingthe requisite pressure upon the sleeve 8O for reventing the entrance of water between tlie collars 82-83 and the ends of the sleeve 8() against the pressure of the water being forced outward from the annular recess 81.

So far as 1 am aware, 1 am the first in the art to provide means for delivering clean the restricted opening from. the 1 serves not only to lubricate the bearings but also to flush out the bearings and to prevent the water being forced upward past the bearing in the water discharge casing from entering between the shaft and the sleeve.

lln the same way the water delivered froml ward the water raising elements to prevent the entrance of the dirty water being pumped, the grooves 63 and 6-1 being cut in such a direction that the water in such water to the interior of the bearings spaced along a line of pump shaft above the runners without the use of an inclosing shaft casing, f

and 1 therefore wish to claimthis feature broadly, both in connection with the particular means l have shown in the drawings for delivering the water to the bearings and in connection with any other shitable means for vthis purpose. 1t will be understood, .morcover, that the structure may be varied in many details .without departing from the spirit of my invention, andmy claims are to y i be construed accordingly.

l)"Vhile l have described the bearings as being lubricated by water and prefer to use such a lubricant when the pump is being used for pumping water, it will be understood that 1 do not wish to restrict myself -to the use of any particular lubricating element as distinguished from some other suitable lubricant. 1t will be appreciated that any means for forcing' water through a bearing would serve equally well without change to force any other suitable lubricant through the bearing. rlhe claims, therefore, in calling for means for forcing one type of lubricant through the bearings are broad enough to cover the same or similar means for forcing another suitable lubricantthrough the bearings.

llhat l claim as my invention and desire -to secure Iby Letters Patent, is-

1. 1n a rotary pump, the combination of a sectional water discharge casing, a rotary pump shaft extending downward therein, a

collar at each 'oint in the water discharge casing secured etween the adjacent ends of f the casing sections, a plurality of bearing sleeves for Said shaft integrally connected with said collars respectively, and means for delivering clean water. into each of said bearing sleeves 'for preventing` any foreign substance carried by l the j water being pumped from entering..

2. In a rotary pump, the combination of a sectional water discharge casing comprising two casing sections, connecting'sleeves secured by means of screw-threads upon the adjacent endsl of said sections'respectively, andv bolts securing said. two connecting sleeves together, a collar positioned between said two connecting collars and between the ends of the said sections secured tightly in osition by 1said bolts, a bearing sleeve' ormed integrally with said last-named collar, a shaft extending downward in said water discharge casing and through said bearing sleeve, said sleeve being provided with a recess on its innerface about said shaft, and means for delivering water under pressure to said recess for .preventing any foreign .substance carried by the water being pumped from entering said bearing.

3. In a rotary pump, the combination of a rotary pump shaft extending down into a well, a runner connected with said shaft, a water discharge casing through which the .water pumped is adapted to rise. in contact With the shaft along the major portion of 35 its length, bearings for said shaft within said water discharge casing, a pipe extending down alongside of said shaft and comi municating with the interior of the several bearings, means for forcing a lubricant through said pipe into said bearings adapted to prevent any foreign substance carried by the Water being pumped from entering said bearings, andmeans'serving tofree of sand and grit the lubricant forced into said pipe.

a rotary pump shaft extending down into a well, a runner connected with said shaft, a water discharge casing through which the waterpumped is adapted to rise. in contact .with the shaft along the major portion of its length, bearings for said shaft within said water discharge casing, a pipe extendingdownward alongside ofsaid` shaft and communicating with the interior of the several bearings, and a runner mounted on'said shaft near its upper end adapted to force a lubricant through said pipe into said bearings for preventing anyforeign substance carried'by the water being pumped from en- 4. In a rotary pump, the combination of' tering said bearings, the outlet from saidv runner being comparatively small relative to the capacity of the runner whereby the 'runner exerts an upward pressure for supextending downward through said water discharge head and said water discharge casing, a shaft bearing supported opposite a joint between adjacent sections of the water discharge casing with which bearing the water pumped is brought into contact as it rises through said water discharge casing, a runner casing supported by said water discharge head about said shaft, ya runner mounted on said shaft within said runner casing, a pipe connecting said runner casing below said runner with the interior of said bearing whereby the runner is adaptled to force a lubricant into said bearing for 4preventing any foreign substance carried by the water being pumped from entering said bearing, and means serving to free from sand and 'grit the lubricant forced into said pipe.

6. In a rotary pump, the combination of a' vertical driving shaft, pumping means mounted thereon down in the` well, vand auxiliary pumping means slidably and adjustably mounted upon the driving shaft `for forcing a lubricant to the bearing or bearings of said shaft adapted to create a pressure underneath the said auxiliary pumping means and to lift up on said 4shaft for reducing thefriction of the shaft supporting vbearings thereby reducing the power required for operating the pump.

7.' In a vertical deep well pump of the type describedl designed to pump sand or yother foreign substances with the water, the

combination of a bearing or bearings located upon the drive shaft in the `water passage of the pump in contact with the water rising therethrough, and means for preventing sand from entering the bearing, comprising a cap having a working sliding t upon the shaft and revoluble therewith and bearing against the end ofV the bearing and held in contact therewith by yielding means, and means for producing a continuous discharge of lubricant from the bearing to prevent gritty substances carriedby the waterbeing pumped from entering the bearing and injuring the bearing or the shaft.

MATTI-IEW T. CHAPMAN.

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