US1302899A

US1302899A - Pumping machinery.

Info

Publication number: US1302899A
Application number: US1120515A
Authority: US
Inventors: Matthew T Chapman
Original assignee: Individual
Current assignee: Individual
Priority date: 1915-03-01
Filing date: 1915-03-01
Publication date: 1919-05-06
Anticipated expiration: 1936-05-06

Description

M. T. CHAPMAN.

PUMPING MACHINERY. APPLICATIOW'FILQD MR. 1. 19:5. 1,302, 99 Patented May 6, 1919.

2 SHEETS-SHEET 2.

llllllllllllll IEEMLIEIIIIIII vr I r";

WZZ 24 45151455 J51 we u :02;

40. a W J3 L/g i flr zw MATTHEW T. CHAPMAN, 0F AURORA, ILLINOIS.

PUMPING MACHINERY.

Specification of Letters Patent.

' Patented May 6, 1919.

Application filed March 1, 1915. I Serial No. 11,205.

To all whom it may concern:

Be it known that I, MATTHEW T. CHAP- MAN, a citizen of the United States, residing at Aurora, in the county of Kane, State of Illinois, have invented certain new and useful Improvements in Pumping Machinery, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to pumping machinery and particularly to the operating mechanism by which a plurality of plunger rods operating single-acting plungers are adapted to be reciprocated. It is one of the objects of my invention to provide suitable operating means which shall be adapted to raise the plunger rods in the desired manner but which shall be incapable of forcing the plunger rods on their down ward stroke so as to cause them to buckle or break. It is another object of my invention to provide a construction and arrangement by which the friction shall be reduced to a minimum, while at the'same time the application of force to the plunger rods shall be such that therewill be no side draft upon the plunger rods which would tend to crystallize or break the plungerrods. It is another object of my invention to provide a structure of the type just described by which an increased amount of water may be pumped and by which the upward flow of water through the well-pipe may be kept continuous, thus avoiding the necessity for overcoming the inertia of alternately stopping and starting the water. It is another object of my invention to improve pumping mechanism of this typein sundry details hereinafter pointed out. The preferred means by which I have accomplished my objects are illustrated in the drawings. and are hereinafter specifically described. That which I believe to be new and desire to cover by this application is set forth in the-claims. i r

In the drawings: r i

Figure 1 is a front view of a power head. embodying my. improved construction;

Fig. 2 is a side view as seen from the right in Fig. 1; a

Fig. 3is a top view of the crank and gearing employed, substantially as seen from the line 33 ofFig. 2;

Fig. 4 is a top view of one ofthe cross heads by which the plungers are connected to the operating devices, substantially as seen from line 4l of Fig. 2;

Referring to the several figures of the drawings in which corresponding parts are indicated. by the same reference characters,

10 indicates the foundation for the power head, preferably of concrete, having secured in it the upper end of the well-pipe 11, to which is suitably attached a delivery pipe 12. Secured upon the foundation 10 in any suitable manner is a .base-plate 13 from which rises a frame-work 14 of any suitable type. As is shown in Fig. 7 the well-pipe 11 has slidably mounted in it in suitable position relative to the supply of water in the well three plungers 151617, each of which has a suitable working fit in the wellpipe and each of which is provided with an upwardly opening valve of any suitable type. The plunger 15is secured in any suitable manner to a plunger rod 18 which passes upward through the

plungers

16 and 17 the plunger 16 is connected in any suitable mannor to a tubular plunger rod 19 Which passes upward through the plunger 17 and the plunger 17 is connected in any suitable mannor to a tubular plunger rod 20. As is shown in Fig. Al, the plunger rod 18 is mounted within the tubular plunger rod 19, and the tubular plunger rod 19 is in turn mounted within the tubular plunger rod 20. As will be readily understood, suitable packing of any approved type is provided between the plunger rod 18 and the plunger 16 and be tweenthe plunger rod 19 and the plunger 17. Inasmuch as the parts so far described are well-known and well understood in the art, it is believed to be unnecessary to further illustrate or describe them herein.

Ashaft 21 is fixed in position in the upper end-of the framework 1 1, said-shaft having revolubly mounted thereon a plurality of wheels or sheaves 22-23-21-25-26, in the construction shown the sheaves 23, 24; and 25 being mounted upon the shaft 21 between the supports for said shaft on the framework 141, and the sheaves 22 and 26 being mounted upon the projecting ends of said shaft, collars 2728 being secured upon the shaft for holding the sheaves 2226 on said shaft. The arrangement is such, as is shown in Fig. 2, that the ropes or cables passing over the several sheaves, as hereinafter described, are adapted to extend vertically in a vertical plane passing through the centers of the plunger rods and extending from side to side of the power-head parallel to the axis upon which the sheaves are revoluble.

29 indicates a crank-shaft comprising portions 30-31 which have suitable bearings in the framework 14, concentrically arranged plates 3233 connected to the outer ends of the portions 30-31, offset portions 34-35 in alinement with each other, an offset portion 36 arranged at 120 from the offset portions 3435, as shown inFig. 2, and a plurality of arms 37 joining the several parts together as shown in Fig. 3, in the construction shown all of the parts mentioned .being formed integrally with each other. Mounted upon the plates 3233 in concentric-relation to the bearing portions 3031 of the crank-shaftv are two gears 3839, respectively, by which the said shaft is adapted to be driven from any suitable source of power, the gears being secured to the said plates by means of bolts or in any other suitable manner. The gears 3839 are provided with wrist-pins 40-41, respectively, offset relative to the axis of rotation of the shaft and arranged at 120 from the

offset portions

34, 35 and 36, as shown in Fig. 2.

42indicates a flexible connection preferably in the form of a wire cable extending over the sheave 24 connected at its forward end to the plunger rod 18 and at its rear end to the offset portion 36 of the crank-shaft.

. The plunger rod 19 has fixedly mounted upon its upper end a cross-head 43 through which is threaded a flexible connection 44 preferably in the form of a wire rope, the ends of the rope 44 extending upward from the cross-head 43 over the sheaves 2325 and being connected at their extremities to the offset portions 3435 of the crank-shaft as hereinafter described. The plunger rod 20 has fixedly mounted in any suitable manner upon its upper end a cross-head 45 through which is threaded a flexible conneetion 46 preferably in the form of a wire rope, the ends of the rope 46 extending upward from the cross-head 45, to andover the sheaves 22 26,-and having their extremities connected, as hereinafter described, to the wrist-pins 4041.

In the preferred form of construction as shown, each end of each of the cables is v prepared as shown in Fig. 6. The wires at the end of the rope are straightened out and unwound for a short distance, whereupon lead or Babbitt metal is poured upon the wires and permitted to harden thereon. The

wires are then bent back over themselves and over the metal which holds them together, and an egg-shaped ball 47 of lead, Babbitt or other soft metal is attached by the use of a mold to form the end of the rope.

The front end of the rope 42 is connected to the plunger rod 18 by means of two clamp plates 4849, which are provided with suitable sockets to receive the ball 47 of the rope and to receive a suitable head 50 mounted upon the upper end of the said plunger rod, the plates 48-49 being connected together about the ball 47 and the head 50 by means of bolts, or in any other suitable manner. The rear end of the rope 42 is gripped by two plates 51 having sockets adapted to receive the ball 47 formed on the end of the rope 42, such plates 51 being secured together by means of bolts 52 or in any other suitable manner. The plates 51 also grip between them' 011 both sides of the rope 42 bolts 53 which are connected at their lower ends to bearing plates 54 mounted on opposite sides of the ofiset portion 36 of the crank-shaft. The bolts 53 are prevented from withdrawal from the plates 51 and from the plates 54 by means of nuts 55 secured upon their outer ends.

The cross-head 45 comprises two plates 5657, as best shown in Fig. 4 adapted to be secured in any suitable manner upon the upper end of the plunger rod 20 and provided with suitable grooves on their inner faces for the passage of the rope 46. The rope 46 extends in front of the sleeve portion of the cross-head by which connection is made with the plunger rod 20, as is clearly shown in said Fig. 4. The cross-head 43 is similar to the cross-head 45 except that it is considerably shorter. The ends of the cross-head 43 are connected by means of springs 43 to brackets 43 extending forward from the framework 14, the said springs serving to resist the upward movement of the plunger rod 19 and tending to return the plunger rod upon its downward stroke at an increased rate of speed. Both of the cross-heads are so arranged with relation to the ropes passing through them that the ropes are free to slide as may be required to maintain an equal strain upon both ends of the rope.

The rear end portions of the rope 44 are connected to the offset portions 3435. respectively, by means of clamping plates 58 similar to the clamping plates 51, bolts 59 similar to the bolts 53, and bearing-plate members 60 similar to the plates 54. The rear end portions of the rope 46 are connected to the wrist-pins 4041, respectively. by means of clamping plates 61 likewise similar to the clamping plates 51, bolts 62 corresponding to the bolts 53, and bearing-plate members 63 similar to the plates 54.

With the crank-shaft 29 being rotated through the medium of the gears 38-39 in clockwise direction from the position shown in Fig. 2, for example, the wrist pins 40-41 are being moved downward, drawing the rear end of the rope 46 downward and causing the cross-head 45 to move upward, carrying with it the plunger rod 20 and the plunger 17. At the same time the ofiset portions 34-35 are moving upward, permitting the rear end of the rope 44 to move upward, and permitting the cross-head 43, plunger rod 19, and plunger 16 to descend. In the position shown in said Fig. 2, the offset portion 36 is at its lowermost point, whereby the plunger rod 18 and the plunger 15 are being held through the medium of the rope 42 at their uppermost positions just ready for their downward stroke. When the crank-shaft has been turned through one-sixth of a complete rotation from the position shown in Fig. 2, the offset portions 3435 will have reached their uppermost position so that the plunger 16 is just ready to start upon its upward operative stroke. Upon the further rotation of the crank-shaft an additional one-third of a complete revolution, the offset portion 36 will have reached its uppermost position so that the plunger 15 will at that time be ready to start its operative upward stroke. Upon the further rotation of the said crank-shaft an additional one-third of a complete revolution the wrist-pins 40-41 will have reached. their uppermost position so that the plunger 17 will be in its lowermost position and just ready to start upon its upward operative stroke. As will be readily appreciated, inasmuch as each successive upward stroke of the several plungers begins before the end of the preceding upward stroke, the column .of water being raised through the well-pipe 11 is kept in continuous upward movement whereby the necessity for starting the column of water upward at the beginning of each stroke is eliminated.

By reason of the arrangement of the powerhead in such a position that the ropes extending downward from the front edges of the sheaves are located in a vertical plane in alinement with the plunger rods, and by reason of the attachment of the ropes either on both sides of the plunger rods, my construction entirely eliminates side strain upon the plunger rods while at the same time eliminating the friction which would be caused by the use of fixed guides. By reason of having the

ropes

44 and 46 slidably mounted in the cross-heads 43-45, respectively, the rope is adapted to adjust itself for an even application of draft to the plunger rods regardless of any stretching or giv ing of one portion of the rope relative to another portion. By reason of the connection of the crank-shaft to the plunger rods by with a result that if the plunger sticks in the means adapted to yield upon the stroke in one direction, the shaft is prevented from causing a downward push upon the plunger rods regardless of the speed of rotation of the shaft. By the use of the sheaves for the application of power from the crankshaft to the plunger rods, the front ends of the ropes or cables act to the best possible advantage for the upward movement of the plunger rods along right lines, and the application of power from the crank-shaft to the rear ends of the ropes is also accomplished to the best advantage attainable, inasmuch as the pull from the off-set portions of the crank-shaft upon the rear ends of the ropes is a direct pull in whatever position the crank-shaft may stand.

By the use of the springs 43 in connection with the plunger rod 19 the plunger rod is caused to descend at an increased rate of speed. The springs 43 are not of such strength, however, as to cause a buckling of the plunger rod, and the actuation of the plunger rod by the spring is not positive,

cylinder no breakage of parts is brought about. While I have shown the use of springs for increasing the rate of downward movement of the plunger rod 19 only, it will be understood that I do not restrict myself to the use of yielding devices with only one of the plungers, but that all of the plungers may be similarly arranged if desired. Moreover, I do not wish to restrict myself to the use of yielding means connected to the upper end of the cross-head for increasing the rate of downward movement, except as hereinafter specifically claimed, inasmuch as it will be understood that any other suitable arrangement may be used.

By reason of my construction eliminating the use of stationary guides for preventing side draft upon the plunger rods as have been in customary use heretofore, I have reduced materially the friction involved in the operation of the pump, rendering the pump capable of being driven to good advantage by a smaller amount of power than if such stationary guides were used.

What I claim as my invention and desire 11 to secure by Letters Patent, is in direct alinement with the plunger rod or 2. In a pump, the combination of a rigidly united with said plunger rod, a plunger mounted thereon, a cross-head fixedly secured on the upper end of said plunger rod, a flexible connection threaded loosely through suitable openings in said cross-head, means connected with both end portions of said flexible connection for reciprocating said cross-head thereby, and revolubly mounted wheels over which said end portions of the said flexible connection run adapted to cause said crosshead to move always in the vertical plane passing through said cross-head and said plunger rod.

3. In a pump, thev combination of a plunger rod, a plunger mounted thereon, a cross-head fixedly secured on the upper end of said plunger rod, a flexible connection threaded loosely through suitable openings in said cross-head, plates secured to the respective end portions of said connection, a crank, two bearing devices adapted to be revolved in unison about the axis of said crank, and four links two connecting each of said bearing devices with one of said plates on opposite sides of the end of the flexible connection whereby the crank is adapted to pull upon said flexible connection without side draft on any of the parts.

4. In a pump, the combination of three plungers, three plunger rods connected with said plungers respectively, and means for reciprocating said plunger rods, comprising a crank-shaft having two offset portions arranged at 120 from each other about the axis of rotation of said shaft, a plate shaft, a gear secured to said plate in concentric position relative to the axis of rotation of the shaft, a wrist-pin connected to said gear arranged at 120 from each of said ofl'set portions of said crank-shaft about the axis of rotation of the shaft, and operative connections between the respective plunger rods and the offset portions and the wrist-pin of said crank-shaft and gear. r

5. In a pump, the combination of three plungers, three plunger rods connected with said plungers respectively, a crank-shaft comprising two bearing portions, two offset portions in alinement with each other, a third offset portion arranged at 120 from said first-named ofi'set portions about the axis of rotation of said shaft, arms connecting said bearing portions and said oflset portions, and two plates concentric with the outer ends of said bearing portions, all of said crank parts being rigidly united with each other, two gears secured to said plates respectively in concentric position relative to the axisof rotation of said shaft, wristpins carried by said gears respectively arranged at 120 from said oflset portions about the axis of rotation of said shaft, operative connections between one of said plunger rods and said first-named oflset portions, operative connections between another of said plunger rods and said third offset portion, and operative connections between the other of said plunger rods and said wrist-pins.

0. In a pump, the combination of a plunger rod, a plunger mounted thereon, a cross-head mounted on the upper end of said plunger rod, two springs one connected with each end of said cross-head adapted to resist the upward movement of the crosshead and plunger rod, a flexible connection threaded loosely through suitable openings in said cross-head and extending upward therefrom at each side of the plunger rod, and means acting upon said flexible connection for raising said cross-head and said plunger rod.

7. In a pump, the combination of a plunger rod, a plunger mounted thereon, a crosshead fixedly secured on said plunger rod, a flexible connection threaded loosely through said crosshead, plates secured to the respective end portions of said connection, a crank, two bearing devices adapted to be revolved in unison about the axis of said crank, and links connecting each of said bearing devices with the plates at opposite ends of the flexible connection whereby the crank is adapted to pull upon said flexible connection without side draft on any of the parts.

8. In a pump, the combination of a plunger rod, a plunger mounted thereon, a flexible connection connected at one end with said plunger rod, a clamp secured upon the other end of said flexible connection, a crank, a plate revolubly mounted on the oflset portion of said crank, and two links connecting the ends of said clamp on opposite sides ofthe flexible connection with the ends of said plate on opposite sides of the offset portion of the crank.

9. In a pump, the combination of a plunger rod, a plunger mounted thereon, a flexible connection connected at one end with said plunger rod, a pair of clamping plates secured upon the other end of said flexible connection, a crank, a pair of plates revolubly mounted on the oflset portion of said crank, and two links connecting the ends of said clamping plates upon opposite sidesof the flexible connection with the ends of said last-named plates on opposite sides of the offset portion of the crank.

MATTHEW T. CHAPMAN.

Witnesses W. H. DE BUSK, W. A. FURNNER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

' Washington, I). 0.