US1587361A - Pump - Google Patents

Description

\ June 1 1926;

' FIGURE 1 i 9 i 1,587,361 B. R. BARTON PUMP F iled Dec. 10, 1925 FIGURE 5 311m: 1;: u m 6 I 5 NH v "I I I I -J lHllll- .l V k I '14 1 ,AL K 18' l 16 a i! z; **l we a 3 Him I 1 1 FlGURE 2 I l I M 1 A a Y Y ATTORNEY Fatented June 1, 1926 UNITED STATES BRUCE R. BARTON, OF SAN JOSE, CALIFORNIA.

PUMP.

Application filed December 10, 1925. Serial No. 74,552.

This invention relates particularly to deep well centrifugal pumps.

It is one object of the invention to provide a pump of the character indicated in which the usual bearings for the driving shaft are entirely eliminated, thereby materially simplifying the construction and reducing the cost of producing and installing the type of pump referred to, as well as materially reducing the cost of operation and upkeep of the pump.

It is another object of the invention to materially simplify the form and construc- 'tion of the bowls in which the impellers operate.

It is still another object of the invention to of lubricating oil below the pump head.

Finally, it is an object of the invention to provide a pump construction of'the character indicated that consists of few parts, quickly and easily assembled or disassembled, economical to manufacture, and highly eflicient in its practical application.

In the drawing Figure 1 is a side elevation of a portion of a pump embodying my invention.

Figure 2 is a sectional view on line 2-2 of Figure 3.

Figure 3 is a sectional view on line 3-3 of Figure 2.

Referring more particularly to the drawing, I show at 1 sections of discharge casings threaded into the opposite ends of couplings 2 as shown at 3 to form a continuous discharge casing column.

It is desirable that each coupling 2 be provided with a shoulder at 4- near its upper end to receive the end of the adjacent casing 1 so that the inner surface of the coupling will form a continuous surface with the inner surface of the said casing section. From this point, however, the inner surface of the coupling converges slightly toward its lower end as to point 5 and then flares abruptly outwardly to the shoulder 6 provided to receive the upper end of the lower casing section 1 as shown. This inner surface 7 of the coupling 2 in other words, is in the form of an inverted truncated cone, the angularity of the surface relative to its axis beingsuch as experience and use may dictate.

Any suitable form of pump head may be used as at 8, a driving pulley being shown at 9, the driving shaft at 10, and a thrust bearing for the shaft at 11. The shaft 18 threaded at its upper end as at 12 to recelve a nut 13 by means, of which the shaft may be vertically adjusted as desired.

At 14; I show a shell provided with a central hub 15 supported therein by means of a pair of spiral vanes 16 and 17 curving upwardly about the hub from its lower to its upper edge as shown. The shell 14 preferably extends a distance above the hub for the purpose hereinafter set forth, and the outer surface 18 of the shell is conical in form to correspond and cooperate with the inner surface of the coupling in which it is placed.

The hub 15 is threaded to receive the ends of shaft sections 1 as shown at 19.

The several parts ofthis pump are assembled as it is lowered into the well, one casing, coupling, impeller and shaft section being in position a coupling is threaded on to the upper end of the casing section, and an impeller is threaded on to the corresponding shaft section. Casing and shaft sections are now threaded on to the upper ends of the impeller hub and the coupling and the process repeated until the desired depth has been reached. r

In this construction the parts 2 not only function as couplings but also to a certain degree. as bearings. The shell 14 is so proportioned and adjusted relative to the part 1 that there is a substantial clearance between the two, a clearance sufficiently great to permit the flow of water therebetween when the pump is in operation, and thereby forming a water lubricated bearing. The direction of flow of the water through this space between the shell and coupling would of course be downward if these walls were parallel to the axis of rotation of the impeller and consequently a great deal of sand would be carried therethrough. By causing these parallel walls to converge somewhat toward the bottom, however, the centrifugal force generated by the revolving of the impeller at high speed creates an upward flow of water between the impeller and coupling and consequently much less sand is introduced into this space.

The provision for adjusting the shaft and impellers is also important because a certain amount of wear will naturally occur between the impeller and coupling, and this adjustment of the shaft and impeller permits maintaining the desired. spacing between the impeller and coupling.

A pump constructed after the manner set forth is exceedingly durable and efficient, because when it is in full operation the load on the several impellers will maintain the shaft sections and impellers in perfect alignment so that actual friction between the shells 14: and couplings 2 will only occur to any extent during the starting and stopping of the pump, and this alignment is insured, of course, by the moving cylinder of water be tween the impeller and coupling.

WVhile the hub 15 need be only sufficiently long to properly receive the two shaft sections and support the inner edge of the vanes, the shell 14 may be extended considerably as desired a long shell being naturally more eflicent and longer lived than a short one.

It is to be understood, of course, that while I have herein shown and described one specific embodiment of my invention, changes in form, construction, method of assembly and operation may be made within the scope of the appended claims.

I claim 1. In a pump structure of the character described, a coupling insertable in a discharge casing column and provided with a conical inner surface, and an impeller operatively mounted to rotate in said coupling, said impeller including an annular shell having a conical outer surface arranged in spaced and parallel relation to the conical surface of said coupling to permit the passage of water therebetween.

2. In a pump structure of the character described, a coupling insertable in a discharge casing column and provided with a conical inner surface, and an impeller operatively mounted to rotate in said coupling, said impeller including an annular shell having a conical outer surface arranged in spaced and parallel relation to the conical surface of said coupling to permit the passage of water therebetween, and means for varying the spacing of the said shell relative to the coupling.

3. In a pump of the character described, a coupling for discharge casing sections having a conical inner surface and a conical longitudinally adjustable impeller operatively mounted therein, the opposing surfaces of the coupling and impeller being spaced apart to permit the flow of water therebetween.

4. A pump structure including a vertical discharge column comprising a plurality of casin sections and couplings therefor, each coupling having an inner surface in the form of an inverted truncated cone, an annular shell having an outer surface in the form of an inverted truncated cone positioned in each coupling with said conical surfaces in close proximity to each other, spiral vanes mounted in said shell, a hub carried by said vanes, and a driving shaft coupled to said hub.

5. In a pump structure of the character described, a member insertable in a discharge casing column and provided with a conical inner surface, and an impeller operatively mounted to rotate in said member, said impeller including .an annular shell having a conical outer surface arranged in spaced and parallel relation to the conical surface of member to permit the passage of water therebetween.

BRUCE R. BARTON.

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