US2151067A - Power pump unit - Google Patents

Description

March 21, 1939.

v. 1. ANDREW POWER PUMP UNIT Filed Feb. 9, 1938 BY EENTQR.

' ATTORNEY.

7 March 21, 1939. v ANDREW v I 2,151,067

POWER PUMP UNIT Filedfeb. 9, 1938 I 2 Sheets-Sheet 2 M Y INVENTOR.

ATTORNEY.

. UNITED STATES Patented Mar. 21, 1939 PATENT OFFICE POWER PUMP UNIT Vaughan L. Andrew, Superior, Wis. "Application February 9, 1938, Serial No. 189,626

6 Claims.

"is the compacting of the two ends of the pump,

' of the pump are separated and which is substantially'universal in this type of unit.

Still another object is to make more readily 7 available those parts of such a unit which may need attention from time to time.

A further object is to provide such a unit wherein any leakage from the water end of the pump is positively prevented from in any way interfering with the power end thereof, or vice versa. I

. Still other objects and advantages of the invention will appear in the following description thereof.

' Referring now to theaccompanying drawings, forming part of this application, and wherein like reference characters indicatelike parts:

Figure 1 is a vertical central sectional view through one of the pump units, except that the upper portion of the section is offset from the center to illustrate the two intake water valves, onein section and the other in'elevatiomother portionsof the unit also being shown in elevation,

\Figure 2 is a horizontal section on the line 2-2,

] Figure 1, the crank pin-being'shown in horizontal position. c

Figure 3 is a horizontal sectionon the line 3 3, Figure -1, with the cover'of the power end removed, and the crank pin 22 shown in horizontal posi- -tion;,'

It is well known that in units of this type, driveneitherby an electric motor as here illustratedor a gasolene motor, trouble is experienced in keeping the stuffing glands'of such a unit properlyadjusted,and that, especially after some considerable time of, use, and in such units where the power end is spaced from the pumping end with the piston exposed intermediate of the extrem- :ities of the unit as is common, water from the pumping end will follow the piston into the gland of thepower en'd,pcausing interference with the normal functioning of the unit, the elimination of which it will appear I have accomplishedin the I novel assembly here illustrated,

In the embodiment here illustrated I have shown at I the principal supporting housing, which is preferably of a single casting substantially rectangular in shape, though somewhat elongated, the power end embodying the chamber 5 2 and the pumping end the chambers 33, there being preferably a larger chamber 4 substantially the entire size of the interior of the housing beneath these chambers 2 and 33, separated therefrom as by the stepped floor or partition 5. 10 Intermediate of the chambers 2 and 3-3 is the vertical division wall 6 which is shown as a continuation of the floor 1 extending longitudinally and centrally of the bottom of the chambers 33 and providing the integral depending sleeve-like support '1 for the power pitman 8. The floor I has a central upstanding integral portion 9 forming the pumping cylinder, the same being a portionof the division wall intermediate of the chambers 33, though preferably lined as with the 0 brass or other sleeve l0, and in which the pumping piston I I is horizontally reciprocated as by the piston rod I 2. This latter extends through its stufiing box 13 outwardly through the end wall of the housing and is rigidly connected as by the coupling M to the similar outwardly extending end of the power pitman 8, so that these two members are in perfect parallel alignment and operate in unison. By this construction it is noted that the necessity of a stuffing gland for the pitman 8 is eliminated, and the peculiarity of this construction will be described later.

The power chamber 2 of the housing is preferably provided with a removable covering member l5 which is held in place by any desired number of tap or other bolts I6 through the various holes 11 in the housing, and the housing has extending laterally therefrom the sleeve or wrist-like journal 18, formed integral with the housing and also extending inwardly as well as outwardly therefrom. Within thisjournal is mounted the hollow wrist pin IQ of the driving pulley 20 formed integrally therewith, and the inner end of the wrist pin 59 is solid as at 2| and has fixed therein the driving or crank pintle 22, eccentrically thereof, and which pintle carries the crank arm 23 of the power unit which is pivoted as at 24 to the reduced end, 25 of the pitman 8, thus forming a direct connection from the pumping piston II to the wrist pin Hi. This latter, upon its inner end, is provided with a circular covering plate 26 held in position against the pin by a suitable tap bolt 21, and, just inwardly of the union of the web of the pulley 20 with the wrist pin Hi, the latter is provided with acircumferential bead indicated at 28 for engagement with the inner surface or shoulder of the annular groove 29, about the interior of the outer terminus of the sleeve l8.

The bead 28 functions as a thrust bearing for the wrist pin, and just outwardly of this bearing is installed a suitable oil stop 30 to prevent any possible leakage of lubrication from the bearing.

The outer open end of the wrist pin l9 may be 7 known in the art as a V-belt, but in this instance only the smaller pulley of the motor is required to be of V -shape. V, t V

The water end of the unit is of the usual four valve double acting type common in the art, and

the valves of which are indicated at 34 operating alternately in pairs as the piston H is reciprocated, two being closed while the other two are open, and vice versa in respect to the discharge of water from the chambers 33 through the discharge opening 35, the intake opening of the pump being indicated at 36. The arrangement of the valves 34 in this instance is such that all four of said valves are installed from above and into the upper wall of the chambers 3-3 or pump head of the unit, they being covered by the removable air chamber 31 which is held in place by a suitable through bolt 38, as is common.

It is to be noted that the stufling box l3 about the pump piston I2 is integral with the stuffing box 40 surrounding the pitman 8 and that they together form a covering member for, the two openings 4| and 42 into the pump end of the housing, and also that this covering member is held in position by any number of tap bolts such as indicated at 43, it being found only necessary to cover the stuffing box 40 about the pitman 8 with a cap 44 and suitable gasket 45 held thereby, this being sufiicient for prevention of any oil being carried out of the housing by the pitman 8,

, While the stufiing box about the pump piston rod I2 is shown as provided with a common stufiing gland and packing controlled by a novel form of pressure device 46, which is spring controlled to insure uniform pressureupon the gland.

' Thus it is seen that by the removal of the coupling member I 4, which rigidly carries the end of the pumping piston rod 12 and is fixed to A further novel feature of this assembly is that V 1 porting housing upon and within one end'of the sleeve like member I forming the guide and holder of the pitman 8 is divided into three bearing portions with open spaces intermediate of ample room for drippage of surplus oil being carried by the rod during its reciprocal action,

and yet permitting same to utilize ample of the oil for necessary lubrication,

Furthermore it is to be noted that the cover member l5 for the power end of the unit is provided with oil dripping fins 41 and 48 depending therefrom, and which fins. convey oilsplashed thereupon by the operation of the device onto both bearings of the crank arm 23, and that the disc 26 has formed thereon opposite laterally projecting angular. wings 49 for the purpose of carrying oil from the bottom of the chamber 2 about and splashing it promiscuously within said chamber to insure ample supply for the various parts thereof. r

The drippage of oil from the sleeve-like support I is conveyed by'gravity'upon the inclined bottom 50 back to the chamber 2, as clearly illustrated so that circulation of oil is constantly taking place during the operation of the device, and is adequate for long time lubrication, which is so essential in such a unit.

Having thus described my invention, what I pitman for transmitting energy from the power end of said housing to the pumping mechanism at the other end slidably supported beneath said pumping mechanism and connected thereto externally of said housing, and an oil chamber common to said means and to all of the moving parts of the power elements within said housing. 2. In a pumping power unit, a supporting housing, a power supply shaft transverse one end of said housing, a pump and valves therefor in the opposite end of the housing and means including a horizontally slidable pitman operable beneath saidpumping mechanism for transmitting energy thereto from said power shaft, and an oil chamber common to said means and said power supply shaft.

3. In a pumping power unit a supporting housing, a motor mounted upon one end of said housing, a combined water and air chamber mounted upon the opposite end of said housing, a power transmitting shaft extending Within said housing beneath said motor and driven thereby, a reciprocal sliding pitman extending through the opposite end of said housing for conveying power from said shaft to outwardly of said housing, and a reciprocal pumping piston installed intermediate of said'chamber and said pitman and rigidly connected to the latter externally of said housing.

4. A combined reciprocal piston pump and power unit including a supporting housing having an oil containing chamber therein, a power shaft extending within said chamber adjacent one end thereof, a slidable pitman within said chamber operated by said power shaft and extending through the opposite end of said chamber, and

means for rigidly connecting said pump piston and pitman externally of said housing.

5. A pumping power unit comprising a supwhich the power supplying elements are supported and pumping mechanism upon and within the opposite end, characterized by means including a single horizontally reciprocal pitman supported within said housing beneath said pumping mechanism for transmitting energy from the power end of said housing to the pump-' ing mechanism and connected thereto externally of said housing, there being an oil chamber common to said means and all of the moving parts of the power elements withinsaid housing, 7

6. A combined pump and power unit comprising an elongated housing, power supplying elements at one end of said housing, pumping mechanism at the other end of said housing, said mechanism including a piston rod for operating same 'pumping mechanism, a slidable pitman beneath the pumping mechanism and connected with said piston rod for transmitting power from said

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