US2086521A - Pump - Google Patents

Description

July 13, 1937'. w. H. Bgm-ETT ET AL 2,086,521

PUMP

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PUMP

Filed July 29. 1935 :s sheets-sheet Patented July 13, 1937 UNITED STATES PUMP William H. Beckett and Anthony G. Horvath, Dayton, Ohio, assignors to The Dayton Pump & Mfg. Company, Dayton, Ohio, a corporation of Ohio Application July 29, 1935, Serial No. 33,645

1 Claim.

This invention relates to deep well pumps and a method of pumping deep wells'.

It is the o-bject of the invention to provide means of pumping by the differential cylinder more water than is pumped by the well cylinder.

It is an object to provide a differential cylinder in which on the up-stroke theA cup leathers will collapse and admit sufficient air for use on the down-stroke and in which the air will be trapped only in the differential cylinder and there will be substantially no air pocketed in the water chamber between the differential cylinder and the drop pipe.

It is a further object to provide a pressure chamber with a restricted inlet in order to regulate the flow of water into the pressure charnber in order to prevent sudden rises and decreases of pressure therein which result in causing a fluctuation ofthe pressure switch which controls the connection of the pump driving motor to the pump.

It is an object to provide such a restricted control which is constantly swept and cleaned by the passage ofthe water from the pump.

It is a further object of the invention to provide a Adriving head that is substantially permanently lubricated and so related to the differential cylinder and drop pipe that any drippings of oil or grease will not return into the well.

It is an object to provide a high speed deep well pump which will not become water-logged or air-bound despite the speed of operation.

It is a further object to pro-Vide a deep well pump which has a common base, which common base supports the driving head bracket and the motor support and the motor support is pivotally mounted on the driving head bracket. It is thus possible to remove the entire driving head mechanism with its motive power from the base which comprises the water chamber. The water chamber base is so arranged as to provide an aligning support for the drop pipe and an aligning support for the differential cylinder. Thus all parts are so aligned that, upon the assembly of the pump or disassembly thereof, a person of no skill with only ordinary toolsV can perform all the operations necessary.

Referring to the drawings:

Figure 1 is an end elevation of the pump;

Figure 2 is a section on the line 2--2 of Figurel with the pressure chamber in section and the pressure switch indicated in elevation;

Figure 3 is a section through the well cylinder;

Figure 4 is a sectionon'the line 4-4 of Figure 5 showing the water chamber' base in section to illustrate the methodof supportof the drop pipe;

Figure 5 isa' sectiononthe line 5-5 of Figures landZ;l`

Figure 6 is a section through the relief valve.

Referring to the drawings in detail, I is a water chamber base comprising a base plate 2 and marginal flanges 3. Centrally located in this base is a water chamber designated 4 which depends from the top 2 and is arranged with its tapered side walls as at 5 to support the drop pipe 6. It also supports through the collar I the differential cylinder 8. The top of the drop pipe and the bottom of the differential cylinder are aligned on the same axis and are spaced apart to form the space 9 which communicates with the pressure chamber 4. This chamber is provided with an outlet l having a web II supporting a valve I2 normally held closed by the spring I3 which is positioned by the screw stud I4 mounted in the eye of the web II.

The water passing out of the port I0 enters the inverted bell chamber I which is formed by the base I6 of the pressure chamber I'I. Access between the bell chamber I5 and pressure chamber II is through the restricted orice I8 about five-thirty-seconds of an inch in diameter in the cup I9. The water from the bell chamber passes out the exit line which is screwed into the nipple at 20. Mounted upon the pressure chamber l'I through the cap 2I and pipe 22 is the usual diaphragm pressure-operated switch 23, the pressure on which causes the switch to open when the pressure passes beyond a predetermined point and, upon a reduction of the pressure, the switch closes so as to renew the pump operation. A similar restricted orifice to that at I8 may be employed between the pressure chamber II and the diaphragm switch 23 by locating it at the inlet to the pipe 22 or some similar location. 22a is a pressure relief valve.

The differential cylinder 8 has its transverse diameter slightly greater than the transverse diameter of the well cylinder 6. The displacement of the differential cylinder should be greater than the displacement of the well cylinder. When we refer to size, we are referring to this difference in displacement which may be accomplished by difference in diameter or otherwise. The well cylinder 6 is provided with the usual standing valve 25, valved piston 26 and the sucker rod 21 which acts as the piston rod. The upper end of this sucker rod is connected by the coupling 28 to the connecting pin 29 through the thread 30. Between the shoulder 3l on the connecting pin 29 and the cap 32 is carried a piston for the differential cylinder. This piston consists of a ange sleeve 33, cup leathers 34 and 35 and spacer blocks 36 and 31. It will be noted that the piston has a slight clearance of about one-eighth of an inch at 38. Upon the upward stroke of the piston, the depending skirts 39 of the cup leathers will collapse sufficiently to admit air into the' differential cylinder 8. Upon the descent of the piston in the differential cylinder,

this air will be trapped above the water in the cylinder. 'I'he water, however, will be forced out in a substantially continuous body through the valve |2 with very little air being trapped in the top of the water chamber 4. As the diameter of the differential cylinder is greater than the di'- ameter of the well cylinder, more air and water tend to be pumped by the differential cylinder than by the well cylinder with the results as indicated.

Turning to the driving head, a bifurcated driving head standard comprises an inverted Y- shaped structure comprising a cross head. and driving shaft supporting portion 40 and legs 4|. The legs il are detachably connected by the aligning boltsand associated nuts 42 to the base Also attached to the base and associated with one of the legs 4| is a bracket 43 having a pivot pin 4,4 on which is mounted the pivoted motor base plate 55, the movement in one direction of which is determined by the head of the adjusting bolt 56 mounted on one of the legs 4|. The motor itself designated lil is mounted on a spring base 48. The motor and its plate 45 are limited in their downward and outward movement by the support of the belts i9 mounted on the V-pulleys 5D on the armature shaft 5| of the motor lll.

The belts 49, of which there may be any number, are mounted upon the hat face 52 of the large driven pulley 53. This driven pulley is mounted upon the driving 'axle 54. This axle carries the driving crank 55. The axle 54 is mounted in the opposed, tapered roller bearings 55 which are spaced by the collar 5l held in position by the set screw 58. These bearings are packed with grease, the space 59 acting as a reservoir for the grease. Overlapping flanges 60 and 5| at either end serve to form a packing for the grease. The bearings 55 are respectively held against outward movement by the collar 62 on the shaft 55 and the hub 63 on the pulley 53. This bearing assembly is mounted within the sleeve -on the head l5 and is supported by the webs 55.

The crank pin 5S has mounted thereon a ball bearing permenently lubricated with lubricant and sealed as at 5l. It carries the adjustably split collar 68 on the upper end of the pitman 69. The nut 55a retains the bearing in position against the collar 55h on the crank 55. This pitman is pivotally mounted on the wrist pin 'l0 which in turn is mounted in the tubular cross head 1|, the lower end of which is closed at 12 so as to form a lubricant pocket 73. This lubricant pocket feeds the wicks 'I4 with lubricant. These wicks project through the openings l5 in the side walls of the cross head to lubricate the outside surface of the cross head and the inside surface of the cross head guide 16. Access to this lubricant chamber i3 is gained by removing the cover plate 'll from the head 45.

The lower end l2 of the cross head is externally threaded at i8 to receive the screw-threaded' attaching collar 'i9 which has a chamberl 8D formed by a partition 8| arranged transversely so that the head 82 of the connecting pin 29 can be located in the space 8|) and clamped between the bottom 'l2 and the partition 8| within the collar 715. Thus, it is possible to detach the pin 29 by loosening this collar '19.

In order to prevent the grease from dripping down upon the remainder of the pump and getting into the well a deflecting cover 83 is mounted on the top of the differential cylinder. There is also an appreciable space between the cross head guide and the top of the cylinder vso that any lubricant will either be deflectedy by the collar 83 or otherwise dropped to one side of the differential cylinder. f

It vwill be noted that one of the principal problemsin the maintenance of deep well pumps has been .successfully solved by this construction i without the use of large, heavy and expensive containers for lubricant. Such containers not only require large quantities of expensive lubricant but it is impossible to adequately seal them and they become the resting place for dirt, the accumulation of moisture which dilutes the oil, or the accumulation of foreign material, such as insects, and they are also difficult of being cleaned. As pumps of this character are ordinarily located in remote and relatively inaccessible locations and nearly always in well pits where the conditions of condensation, leakage and the like are severe, it is a matter of great importance as far as possible to maintain thelubricant for the vital parts of the pump sealed from access to them of such disturbing conditions. On the other hand, in the event the lubricant needs to be removed or fails for any reason, it is highly desirable that the failure can be remedied by a very simple repair. This is possible in the present pump by the bodily adjustment or removal of the shaft bearing for the shaft 54 or the crank bearing for the crank pin 65 or the cross head guide and cross head.

In order that some appreciation of the advantages of this pump may be had, the pump illustrated has a three-inch stroke 'capable of delivering 225 gallons per hour with a one-third horsepower electric motor driving the pump at a depth of '75 feet and a tank pressure 01:"40 pounds.

One of the features of the pump is the Very small driving pulley 5l), the very large driven pulley 53 and the very close relationship between the axis of the driving shaft 5l and the periphery 52 of the driven pulley making a close center drive.

It will be understood that it is desired to comprehend within this invention such modifications as may be necesary to adapt it to varying conditions and uses.

Having thus fully described this invention, what is claimed as new and desired 'to be secured by Letters Patent, is:

In combination in a pump, an enlarged horizontallyl disposed water receiving chamber, a valve controlling the outlet of water therefrom, a well cylinder having one end communicating with said chamber rat the lower side and having a piston therein, a differential cylinder having one end communicating with said chamber at the upper side, a piston in the differential cylinder, a common piston rod, and means for actuating the rod connecting said pistons, said differential cylinder and its piston being of greater diameter than the well cylinder andits piston whereby an increase of pressure and fluid in the water receiving chamber is produced on the down stroke, and cup leathers on the piston of the differential cylinder of greater size than the piston and so arranged as to collapse on the upward movement of the differential piston to admit air into the differential cylinder on the upstroke.

WM. H. BECKEITj ANTHONY G. HoavATH.

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