US1709478A - Centrifugal pump - Google Patents

Description

Ap 16 1 29- k M. E. LAYNE 7 1,109,418

CENIRIFUGAL PUMP Filed Feb. 24, 1926 Patented Apr. 16; 1929.

UNITED STATES I 1,709,478 PA E T OFFICE- MAHLON E. LAYNE, OF 'HOUS'ION, TEXAS, ASSIGNOR T LAYNE 6'0 BOWLER CORPORA- TION,-OF LOS ANGELES, CALIFOR;N'IA, A CORPORATION OF CALIFORNIA.

- entra n-Invent. PUMP.

7 Application filed February 24, 1926-. Serial No. 90,252.

This invention relates to rotary and centrifugal pumps of the type employed in deep water wells and the like. Rotary pump'mechanisms of the type 'to which this invention '5 relates generally comprise a pump proper which is suspended in awell hole and connected by shafting t6 the top of the well and there driven either by a pulley or electric motor axially aligned with the pump shaft of thepumping mechanism. Due to the varyv ing depths at which the pump proper is sus pended in the well, such pump mechanism requires a provision for the adjustment of this ump shaft after the mechanism is installed 1n order that the impellers of the pump may be properly centered in the pump bowl. Ac

' cordingly, the art has for some time employed a separate bearin for supporting the pump shaft through which the pump shaft may be longitudinally adjusted, and a flexible coup ling for couplingthe pump shaft to an elec- "tric motor axially aligned with the pump shaft when the rotary pump mechanism is to be directly driven by an, electric motor in anism which could be avoided if suitable means could be provided for coupling the motor shaft and the pump shaft together in 'such a way as to permit adjustment of the impellers of the ump shaft to center the same in the pump owl.

It is an object of the present invention to this adjustment of the impellers of thelpump and motor shaft rigidly connected together so as to act in operation as a single integral shaft. v

Various further objects and advantages of the invention will be apparent from a 'descrip-. tion of a preferredform of centrifugal well j' purpose reference-is made to the accompanying drawings, in which the lnvention is 111115-- a trated in'its preferred form.

In the drawings:

section, of the rotary pump mechanism embodying this invention.

Fig. .2 is an enlarged elevation, partly in vertical section'of the shaft coupling means. Inthe' drawing]? the rotary well pumping mechanism is in cated as n pos tion in a place of a pulley. Such additional bearings provide a rotary pump mechanism in whichpump embodying the invention, for which shat't'b is enclosed from contact with the water pump-rd by the shaft enclosing casingS indicated as built in sections coupled together by hearing blocks 9, which shaft 8 likewise extends to the top of the well.

At the top of the Well the discharge casing 7 is connected to a casing head '10 having the I usual lateral. discharge elbow 11, said casing resting upon a foundation 12. On the top ofthe casin head 10 is mounted a motor I stand 12 which'supports the stator 13 of an electric motor which may be of any preferred 7 or customary construction in so far as details of eleptrical factors are concerned, said mo- 0' tor be ng indicated inthis example of the in vention as an induction motor with the usual laminated core 14, mounted upon a motor shaft 15 which is vertically disposed. and aligned with the pump shaft 6.

The top of the stator 13 of the motor mounts a bracket or cover16 which provides a support for radial and thrust-bearings l7 illustrated as refer-ably of the ball type, which thrust arings support through a collar 18,the motor shaft 15 and thereby the core 14 of the motor upon the bracket 16, the weight hence being distributed through the casing head 10 to the foundation 12. The bracket shown as threaded to a sleeve 19 95. extending up close to and around the motor shaft 15 to provide a means for retaining oil around the bearings 17. 4

In order that such pump shaft 6 and-motor shaft. 15 may be rigidly connected together to act in operationas one integral shaft while still permitting of such assembling of the -mechanism that the impellers 15 carried by i Fig. .1 is an elevat1on,.-partly in vertical,

20 is rovided with a wrench engaging nut 21am the pump shaft 6 is provided with a bore 22 aligned with the axis of-the pump shaft and with the threaded bore 23 at the end of the motor shaft. 15. Threaded into such bore 23 is a de'ntil 24 of a size to fit tightly the recess 23 in the shaft 15, and the recess 22 in the shaft 6. \Vhen these shafts .are brought together in that position which centers the impellers in the pump 3, said dentil 24 operates to maintain such shafts and 6 in axial alignment and prevents weaving of such shafts, which would take place were such shafts coupled together without their ends tightly abutting if no dentil such as 24 was employed.

The use of such means in connecting the pump shaft 6 and motor'shaft 15 provides a simple means by which these shafts may be correctly rigidly attached together at the time the rotary pump mechanism is installed, inasmuch as (lentils 24 of various different lengths may be provided with an apparatus, or such dentils may be cut into the correct length at the time of the installation of the apparatus, thusproviding a simple and inexpensive means by which the shaftmg may be made rigid with proper allowance for the centering of the impellers 15.

In order that such connection may be made, the casing head 10 is shown as constructed in two parts, of which 25 is the upper part and" 26 the lower part, the parts 25 and 26 having interlocking faces 27 so that they will always be assembled in a predetermined position, and are clamped together by suitable means such as indicated at 28.

The lower'part 27 of the casing head 10 is indicated as forming merely a bottom for the casing head 10 and provides a neck 29 threaded to the discharge casing .7. The.

upper part 25 of the discharge casing head 10 is provided with a depending neck 30 extending axially downward through the casing'head and is threaded at its lower end 31 to the upper end of the shaft enclosing cas ing 8, said shaft enclosing easing 8 being 1ndicated as provided with an arm 32 engaging an abutment 33 on the discharge casing 7 to prevent rotation of these parts relative one to the other. The neck 30 at its upper end supports a bearing sleeve 34 for the motor shaft 15, this bearing sleeve thus bemgdisposed within the casing head and in posltion to. be cooled by the water pumped, no other radial bearing being necessary below. the

rotor 14 ofthe motor; and between such sleeve'34 and the lower end of the neck 30,

the neck is provided with an enlarged bore 35 enclosing the coupling 20, and said. neck is there joined with a wrench admitting and supporting web 36. extending radially to the outer side of the discharge head 10 and normally closed by a plug 37.

Witharotary pump mechanism thus constructed, all of the load of the pump shaft impellers, rotor and motor shaft may be supported upon the same bearings 17, these being mounted above the rotor of the driving mem-' ber 14 to suspend such parts in a plumb-bob fashion, which has a marked tendency to lessen or eliminate weaving of the .mechanism. The use of additional bearings and flexible couplings between the motor and discharge head is avoided, the motor shaft 15 of the pump shaft 6 are in use'one integral shaft, although their ends may be various distances spaced apart, and-this construction. permits of a ready'assembly of the mechanism as a whole. I

While the embodiment of the invention herein described is well suited for accomplishing the purposes and objects of this invention, it is to be understood that various. modifications in the details of construction and arrangement of parts may be made without departing from the spirit of the invention, and the invention includes all such modifications and substitutions as come with-' in the scope of the appended claims.

I claim 1. A rotary pumping mechanism comprising a rotary pump having a vertical pump shaft and a vertical discharge casing, a dis charge head connected to the discharge casing, an electric motor supported over tlfe discharge head and having a motor shaft axially alined with the pump shaft and cou-. pled thereto with the ends of the motor shaft and pump shaft spacedslightly apart, the discharge head having a depending neck enclosing the couplingbetween said shafts, and a tool supporting tube opening and extending from the neck at a point opposite the coupling between the shaftsto the side of the head.

2. A rotary pumping mechanism comprising, a rotary pump having a vertical pump shaft and a vertical discharge casing, a discharge head connected with the discharge casing, an electric motor supported over the discharge head and having a motor shaft axially alined with the pump shaft and extending into the discharge head, and a coupling within the discharge head coupling said motor shaft to said pump shaft, the discharge head having a depending neck enclosing the lower end of the motor'shaft and the coupling between the motor shaft and pump shaft, the discharge head further havinga horizontally disposed. tube 7 connecting said depending neckrwith the side wall of the discharge head at a point opposite the coupling between the pump shaft and motor shaftso as to give access to said coupling, whereby to provide a tool supporting tube.

Signed at Los Angeles, Calif, this 17 day of February, 1926.

MAHLON E.LAYNE.

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