US1435400A - Electric drive mechanism for rotary well pumps - Google Patents

Description

M. E. LAYNE.

ELECTRIC DRIVE MECHANISM FOR R TARY WELL PUMPS.

APPLICATION FILED JULY 25,192].

Patented Nov. 14, 1922.

Patented Nov. 14, 1922.

PATENT OFFICE.

MAHLON E. LAYNE, OF SOUTH PASADENA, CALIFORNIA.

ELECTRIC DRIVE MECHANISM FOR ROTARY WELL PUMPS.

Application filed July 25, 1921.. Serial No. 487,470.

To all whomc't may concern:

Be it known that I, MAHIDN E. LAYNE, a citizen of the United States, residing at South Pasadena, in the county of Los Angeles and State of California, have invented a new and useful Electric Drive Mechanism for Rotary Well Pumps, of which the following is a specification.

This invention relates tov electric drive mechanism for rotary well pumps and is particularly directed to a drive mechanism in direct connection with the pump shaft.

. The object of the invention is to provide a drive mechanism having two or more directly connected electric power units vertically alined in superposed relation with the lowermost unit mounted in axial alinement with the well and each superposed unit entirely supported by the next lower unit.-

Another object is to provide a drive mechanism comprising a plurality of vertically alined superposed electric power units detachably united and arranged to permit the installation of additional units or the removal of one or more units to vary the available power of the mechamsm in accordance to the required output and height of lift.

Another object is to provide a mechanism by which several stock units of thesame or different sizes may be variously combined to meet the horsepower requirements of the pump, which requirements vary with varia-' tions in the depth to which the pump is positioned in the well.

A further object is to provide a vertical electric motor and a superposed table bracket for supporting a second motor, with the frame of the first 'motor provided with a seat upon which the bracket rests in true axial alinenient with themotor shaft, the bracket being provided with means for attaching the second motor in true axial alinement with the first motor.

Various other objects and advanta es will be more fully apparent from the fo owing description of the accompanyin drawings which form a part of this disc osure, and which "illustrate a preferred form of embodiment of the "invention.

Of the drawings:

.Figure 1 isa side elevation, partly in sec Fig. 2 is a side elevation of the table bracket.

for supporting one motor upon another, a brief outline of the advantages derived from such arrangement will be set forth, especlally 1n its relation to economy bf installation andits flexibility as to the wide range of available power.

It Wlll be understood that the horsepower available for driving the pump shaft must vary coincidentwith yariations in the'output of the pump and the depth of'the water level below the surface. Further it will be pointed out that in different wells in the same general locality the lift of one may vary considerably from the lift of others and that from long usage of a well or for other reasons the water level may lower continually or suddenly even to the extent of a hundred or more feet below the original water level. E

It will therefore be evident that to provide a driving mechanism universally adaptable to meet these'varying conditions it is highly desirable that such mechanism be adustable as to the horsepower output.

In the present'invention such adjustability is provided by forming the driving mechanism of. interchangeable motor units which may be variously combined to produce a Byway of illustration, assuming that one well re uires a H. P. drive, another a 100 H. a drive and yet another a 75 H. P. drive, the first may be provided with one 50 H. P. motor or if such isnot available two superpltlised 25 H. P. motors maybe installed. e second ma be provided with two superposed 50 H. motors and the third with one 25 H. P. motorsuperposed upon one 50 H. P. motor.

Fuithei-if the water level of either of the longer eifective,'the pump wells should lower to an extent requiring additional available horsepower an additional 25 H. l or 50 H. P. motor as required will be mounted upon the motors originally installed and the drive shaft, shaft casing and discharge casing lengthened to lower the pump suction pipe again below the water level.

From a. standpoint of economy the interchangeability of the motor units assumes a major degree of importance for two reasons.

First, it being evident that to increase or decrease the horsepower of the driving mechanism it is only necessary to inst-all additional units or to remove certain of those already installed instead of discarding the entire driving mechanism and substituting a single new motor of greater or less horsepower. Second, the number of different sizes of motors which the jobber must keep in stock is materially reduced as with the present arrangement the jobbers can supply all usual demands with 25 HP. and 50 HP. motors.

In pumping wells utilized for drawing water or other liquids from the earth and of the general arrangement illustrated in the drawings a well casing 1 is driven down into the water bearing strata, and positioned within the well casing near the bottom of the well is a rotary or centrifugal'pump 2 having a suction pipe 3 extending below the water level. The pump comprisin one or more pump bowls is attached to t e lower end of a discharge casing 4 extending upwardly and supported by a discharge head 5 at the surface. The pump shaft 6 extends upwardly through the discharge head 5 and through a shaft casing 7 which provides a conduit whereby lubricant may be supplied to the various shaft bearings and the pump. The driving mechanism is supported upon the discharge head and in the present invention such driving mechanism consists of two or more superposed vertical electric motors in direct connection with the pump shaft 6 with each motor entirely supported upon the next lower motor intrue vertical alinement.

As illustrated in Fig. 5, the lowermost motor 10 is supported upon a housing 11 with its drive shaft .12 connected to the pump shaft by any suitable form of coupling 13, said coupling preferably being of a flex-.

ible type which may be easily and quickly disconnected. A

"With the motor 10 of a suiiicient horse power to lift the water from the initial water level of the well, the well may be pumped as long as said water level remains at its initial point, but in case the water level lowers to such a point that the pump is no must be lowered by applying, additional lengths of discharge casing a, pump'shafting 6, and shaft casing the pump in the bore of a well or in'mlne drainage work increases the lift and that a greater driving horsepower will be required to operate the pump which will be increased in capacity coincident to such increased lift,

preferably by applying additional pump bowls or units to the pump.

In the present arrangement, instead of following the prior method of removing the driving motorand substituting a motor of greater horsepower, the first installed motor is retained and an additional motor 15 is mounted thereon in superposed relation by means of an intermediate table bracket 16, with the drive shafts axially alined and joined by a preferably flexible coupling 17 (see Fig. 1).

The specific type of motor herein illustrated has a base 20 a main frame 21, and a-cover plate' 22 having a bearing hub 23. The frame 21 is attached to the base by bolts 24 and ordinarilythe cover plate 22 is atder 26 and horizontal seat 27, a reduced center portion 31 bored to fit the bearing hub 23, and a circular top flange 32 all joined to form an integral unit, by circular connecting webs 33, 34 and vertical strengthening ribs or fins 35. The webs 33, 34 have ventilation apertures 36 and the flange 32 is provided with a plurality of apertures 38 to receive the bolts 39 by which the upper motor 15 is secured to the table bracket. The lower sleeve end 30 of the bracket has a plurality of vertical bolt holes 40 spaced coincident to'the spacing of the bolt holes of the cover plate 22 and the table bracket is secured in place upon the cover plate by bolts 4L1 which extend through the holes 40 and the bolt holes in the cover plate and engage into screw-threaded bolt holes in the motor frame.

'With this arrangement the cover plate is secured to the motor frame and the table relation one upon the other in various comcombination with a vertical motor having a binations to meet the horsepower requirehorizontal seat and a concentric alinmg ments of thewell'pump, with the elements shoulder, a table bracket having a sleeve constructed to produce an automatic true portion engaging said seat andsaid shoulvertical alinement of the units and to proder and an upper flange adapted tosupport vide for a quick and easy assembling or dis- 'a second vertical motor, and a series of bolts asembling of the parts for repair or for attaching the bracket to the first motor.

other reasons. I 5. In a device of the nature disclosed, the While it will be evident to those skilled combination with a vertical motor having a in this art that the embodiment herein shown cover plate providing a concentric bearlng and described is of a. referable form, it will hub and having a horizontal seat, a table tor. Y

with the first motor, means attaching the this '6 bracket to the frame of the first motor, and 4 upon the motor frame and adapted for sup- ,without discarding the aforesaid also be understood t at it is susceptible of bracket engaging said seat and having a various modifications and changes without central bore engaging the bearing hub, and departing from the broad scope of the ina single series of bolts attaching the bracket vention as set forth in the following claims. to the l t nd th ove lat t I claim: the motor frame.

1. In a'device of the nature disclosed, the combination including two superposed vercombination including two superposed vertical motors, and an intermediate tablef'ticahmotors and an intermediate stable bracket resting upon the frame of the'lower' bracket, the lowermost motor being formed motor and supporting the upper motor. in to axially alin'e the bracket therewith and true axial alinement with the lower motor, the bracket having means supporting the 2. In a device of the nature disclosed, th second motor in axial alinement with the combination with a vertical motor havin a first motor, means for attaching the bracket '6. In a device of the nature disclosed, theframe and a top bearing plate, of a tale to the first motor, and means for attaching bracket resting entirely upon the bearing the second motor tothe bracket. plate and adapted for supporting a seoon 7. In well mechanism of the character demotor in axial alinement with the firstumoscribed the combination of a pump disposed tor, and a single series of bolts attaching within a well, power transmission a'ndwater the bracket to the bearing plate and the discharge means-extending from the pump bearing plate to the frame of the lower 1110- to the top of the well, a power unit for the pump, and means whereby an additional 3. In a device of the nature disclosed, the length of power transmission and waterdis' combination with a vertical motor having a charge means and an additional ower'unit frame, of a table bracket resting entirely may-be added to lower the level'o the pump arts.

porting a second motorin ax al alinement Signed at South, Pasadena,

19th dayofJul 1921. I

means attaching the second motor to the bracket. l 4. In a device Witnesses? S N H of he new disclosed, the 1 1 a'lifornia,

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