US2273403A - Pump construction - Google Patents

Description

Feb.- 17, 1942.

w. H. HAZARD PUMP 'CONSTRUCTION Filed oct. so, 1959;

3 Sheets-Sheet l Feb. 17, 1942.

w. H. HAZARD PUMP coNsTRUcTIoN Fi1ed ont. so, 1959 3 Sheets-Sheet 2 w. H. HAZARDy l 2,273,403

PUMP CONSTRUCTION Feb. 17, 1942.

Filed Oct. 30, 1939 3 Sheets-Sheet 3 Y il Patented Feb. 17, 1942 PUMP CONSTRUCTION I*vi/"illiam Horace Hazard, Dubuqualowaf-assignor I#to A. Y. McDonald Co.,iDubuque,-Iowa, .a corporation of Iowa Application ctober 30, 1939, Serial No.' 301,874

I1- Claim.

l 'My invention relates to splashprevention and water drainage means for deep well pumps and has particular reference to means for preventing the splashing of `water into the operating parts of the pump'which may leak past the piston in a.

differential cylinder lused in connection with deep" well pumps, and draining the Water from the operating parts of the pump.

Another and further object of my invention is the provision of means for catching andl prey@- venting water .splashing out of a differential cylinderl andk into the power operating parts of a deepwell pump and interfering with the operation of the. parts, `and also preventing the water from becoming mixed with the oil used for@ lubricating the various parts of the power operated mechanism, thereby adding long life' to the operating parts and reducing toa minimum the care and expense necessary for operation of the pump. n

'Anotherand further object of my invention is the provision of means surrounding the diiTer- Aential cylinder of. a `deep well pump whereby Iwatendue to leakagepast the piston in the differential cylinder, 4is drained back into the well or away from the operating parts'of the pump,

`therebyincreasing their eiciency of operation and alsomaking sure that'the water does rnot collect in'pools around VYthe operating parts of the pump.

In pumps ofthis character it will be under- `fstood that usually'the pumping cylinder is placed deep in the well, usually 'below' the water level,

and the water is klifted on the upstroke of the piston through a'pipe into the pump and to a.

pressure tank. It has become common practice to provide differential cylinders to equalize the imotor load and to cause the `motor to operate '-more-smoothly, therebyl functioning better; The `diierential cylinder has a piston therein which operates on the downstroke and forces the Water vout of the discharge chamber into a pressure vtank orout of the pump. VThe work stroke of 1 the pump `piston beingA oni the upstroke and that of the differential cylinderV on the downstroke equalizes the load on the motor-and smoothes out the operation of the pump as a whole.

In my improved pump I providea differential ``cylinder whichis` mounted in the discharge casingof. the pump, which cylinder has a piston `.therein which functions toforce the water out of 'the discharge casing on its downward stroke `and into ya storagetankagainst the water so the motor load is equalized. Above the piston I provide means to prevent the splashing of thewater (Cl. 10S-@2.21)y

partially in elevation, of a completed pump embodying my invention; i

Figure`2' is a top plan View of the differential 4cylinder and air pump and casing therefor, shown Figure`3 s-a vertical sectional view showing the differential cylinder, air pump and 'discharge 4'chamber 'used in connection with my deep well pump;V and 'Figure Il isa View partially in section and partially in elevation, "illustrating, an end' View of the apparatus shownl in'Figure 3.

Referring now specically to the drawings, and

` I5in which AlikeM reference characters refer to'like i partsthroughout, a' housing'lllisshown having .abase portion I l adaptedI to be Vfastened upon 'any'suitable foundation, such as concrete or the `lilrawitha transverse `wall l2' beingprovided in the bottom -ofthe 'housing' Iil'to provide an oil sump `inwhiclroil is contained for'lubrication of thevarious poweroperating -parts of the mechanism. :Side-plates land Iii are provided which -'are securedtothesidesfof the housing lifin any approvedmanner, thus providing asubstantially "ienclosed'housingfor the 'power operating parts Jofthe pump.

Mounted uponthe` top of thehousing iii'is a vmotor bracket Yi-uponwhich-motor rails-I6, I6 are secured, to :which the base ii' of an'electric lmotor i3 is secured. 4A drive pulley I9 is `'mounted on the 4motor shaft `over'which aplu.-

fralfityioV-belts 2i) passand over a y wheel 2l,

external oithefhousingl and voutside of the .pulleyside plate I3. The fly. wheel!! is mounted 4upon afdriveshaitiZ `having a pinion-23 mounted on;0r. formed integrally therewith and inv en- .:gagelnent with afdouble crank gear 24 mounted 1 upon ashaft 35 the ends of which are mountedin the side plates .i3 and I4. Eccentrics Biare ,formed integrally with thegears 24 on the outer iacesthereo withtheirzaxes of rotation upon the shaft Se and upon which a pair of connecting rods 31,31 are mounted which in turn are connected to a walking beam 38 at their upper ends bymeans of a wrist pinSS. The walking beam Vit at its rear end is mounted upon a fulcrum pin 4B to the. outer ends of which an oscillating link 4I is mounted upon pins 42 at their lower ends, the outer ends of which pins 42 are, in turn, mounted in the side plates I3 and I4. A pair of compensating links 43, 43 are mounted at their outer ends upon pins 44, 44 xed in the side plates I3 and I4 and at their inner ends upon the connecting rod wrist pin 39, all of which mechanism has to do with the application of power to the pumping means proper, more particularly hereinafter described.

Secured to one side of the housing I6 is a casing 45 which is supported upon a shoulder 46 formed upon the housing I6, and is secured by means of bolts 41 to the housing I6, and which forms a discharge chamber for the pump. The casing 45 has a pump pipe 48 connected thereto at its bottom and a discharge pipe 49 connected thereto at one of its sides which leads to a pressure tank or other suitable receptacle for receiving the water, and has a chamber 56 therein within which the water is received from the pump pipe 48. Mounted in the casing 45 is a gland sleeve I having a cup-shaped portion 52 at its upper end with an opening through the cup- -shaped portion 42 to Which a drain pipe 53 is preferably attached to convey Water collecting in the cup-shaped portion 52 of the gland sleeve back into the well or to any other suitable desired place. The gland sleeve 5I is held in position on the casing 45 by means of bolts 54, 54 passing through trunnions 55, 55 on the gland sleeve 5I, and through suitable cooperating trunnions 55, 56 formed on the casing 45. The casing 45 has a cup-shaped projection 51 at its upper end within which the upper end of the gland sleeve is received, with the space within this member being filled with packing 58 if desired, thereby cushioning and holding the gland sleeve in position in the casing 45.

Mounted within the gland sleeve 5I is a differential cylinder 66 having openings 6I in the side walls thereof opposite the cup-shaped portion 52 of the gland member. rIhe cylinder 66 is in alignment with the water pipe 48 and has the pump rod 62 extending vertically therethrough, the lower end of which is threaded and to which additional sections of the pump rod 62 are secured for the purpose of operating the pump cylinder. The piston is mounted on the pump rod 62 in the cylinder 60. It comprises a follower 63 at the lower end thereof in threaded engagement with the rod 62, a spider 64 over which a cup leather 65 is placed, and a second spider 66 mounted thereabove with an additional cup leather 61 mounted over the spider 66. An upper follower 68 is provided having a trunnion portion 69 on the upper face thereof upon which a splash ring 16 is positioned having packing 1I between the upper and lower parts thereof. A lock nut 12 is provided which locks this assembly together with the space 13 provided between the lower side of the splash ring 16 and the piston follower 68, within which water, working past the pump leathers in the operation of the pump, may collect. The piston rod 62 is connected to a bracket 14 at its upper end, the bracket in turn being connected to the Walking beam 38, one end of which extends through an opening in the edge wall of the housing I6.

Mounted in the casing 45 is an air cylinder 16 within which an air piston 11 is mounted on a piston rod 18, the upper end of which is secured to an extension 19 of the bracket 14. A check valve 86 is provided at the lower end of the air pump with a passage 8| below the check valve leading to a discharge chamber in the casing 45. A wall 82 is provided in the discharge chamber 45 with a check valve seat 83 therein and a check valve 84 mounted thereon. A spring 85 is provided which normally keeps the check valve 84 in position upon the seat 83. A cap 86 is provided having an opening 81 therein through which the pump rod 62 passes, with a screw 88 passing through the cap 86 so that it is held in position over the upper end of the differential cylinder 66. The cap 86 has downwardly turned flange portions directed toward the cup-shaped portion 52 on the gland sleeve 5I, with channels 89, 89 therein into which water passing the splash ring and directed upward by the action of the piston in the differential cylinder may be received and directed downward into the cup-shaped receptacle, where it is drained away from the differential cylinder and back to the well or some other suitable discharge source.

From the foregoing description it is believed that the operation of the device will be very easily and quickly understood in that during the pumping operation water is lifted into the chamber 56 by the pump cylinder on the upstroke of the piston, this water filling the chamber 56 and also the differential cylinder 66. On the downstroke of the piston the water being held in the well cylinder by a suitable check valve, is forced out of the discharge chamber 56, past the check valve 84 and into the discharge pipe 49, usually leading to a pressure tank or the like. With the same stroke the air is forced out of the air cylinder 86 and out through the discharge pipe 49, thereby maintaining a suitable pressure on the pressure tank.

In operation of the device Water will necessarily leak past the leathers 65 and 61 and normally should be trapped in the space 13 above the piston follower 68 and splash rings 16. On the upstroke of the piston, the splash ring 16 passes above the opening 6I so that this water drains out into the cup-shaped portion 52 and is carried away through the opening in the side wall and drainage pipe 53. If the Water passes the splash ring 16 into the upper portion of the cylinder and fails to drain out through the opening 6I as the piston passes upward, this water is forced against the cap 86 into the channels 89 where it is directed downward into the cupportion 52 of the gland member 5I where it is drained away from the pump and is prevented from splashing upward and out of the top of the differential cylinder and through the opening 15 in the housing I6, where it may become mixed with the lubricating oil and with the power operating parts of the pump. In this manner all water which passes the piston in the differential cylinder is drained away from this cylinder and also is prevented from splashing about in the pump housing. A casing 96 is removably secured upon the casing 45 and against the housing I6 and supported by the discharge casing 45 to protect the differential cylinder and air pump during operation.

While I have described more or less precisely the details of construction, I do not wish to be understood as limiting myself thereto, as I contemplate changes in form and the proportion of parts and the Substitution of equivalents as circumstances may suggest or render expedient without departing from the spirit or scope of my invention.

I claim:

In combination with a deep well pump, a casing having a water discharge chamber therein, a differential cylinder mounted in said casing having a drain opening in the Wall thereof, a piston in said cylinder, a removable splash ring spaced apart from the piston head in engagement with the Walls of the cylinder and to move with the piston head whereby a Water receiving chamber is formed above the piston head, the Water receiving chamber above the piston head coming into register with the opening in the cylinder Wall only at the top of the upstroke of the piston.

WILLIAM HORACE HAZARD.

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