US711702A

US711702A - Steam pumping-engine.

Info

Publication number: US711702A
Application number: US8002001A
Authority: US
Inventors: John A Groshon
Original assignee: MARSHALL T DAVIDSON
Current assignee: MARSHALL T DAVIDSON
Priority date: 1901-10-25
Filing date: 1901-10-25
Publication date: 1902-10-21
Anticipated expiration: 1919-10-21

Description

STEAM PUMPING ENGINE.

(Application led 0ct.' 25, 1901.) (No'Model.) 2 vSheets-Sheet l.

STEAM PUMPING ENGINE.

(Application filed Oct. 25, 1901.) (No Model.) 2 Sheets-Sheet 2.v

5M vento/p MM am@ to in detail.

UNITED "STATES PAT-ENT OFFCE.

JOHN A. GROS'HON, OF NEW YORK, N. Y., ASSIGNOR OF 4ONE-HALF TO MARSHALL T. DAVIDSON, OF BROOKLYN, NEW YORK.

`STEAM PUMPlNG-ENGINE.

SPECIFICATION forming part of Letters Patent No. 711,702, dated October L21, 1902.

` Application filed October 25| 1901; Serial No. 80,020. (No model.) y n T0 @ZZ whom, it may concern.: Be it known that I, JOHN A. GnosHoN, aA

provements in Steam Pumping-Engines, of which the following is a specification. s

My invention relates to horizontal pumping-engines; and my invention consists in the arrangement and construction of the cylinders, frame, and working parts of the pumping-engine in such manner as to greatly reduce the weight of the engine and the space required to assemble it and also reduce the vibration of parts owing partly to its compact form and narrow width and short length over all, as well as to the small number of parts. My invention is more fully set forth and shown in the accompanying specification and drawings, in which- Figure l is a plan of my pumping-engine. Fig. 2 is a side elevation of the same, partly in section, taken on the line of Fig. 1. Fig. 3 is a sectional detail view of the pump cross-head, taken on the line a o., Fig. 2; and Fig. 4 is a sectional detail view of the'engine cross-head and frame on line b b, Fig. 2.

Referring to the drawings, A represents a suitable foundation for the pumping-engine, and B represents the steam cylinders arranged side by side, three cylinders being shown and' the engine being either of the three-cylinder compound or triple expansion type, as may be preferred.

C represents a suitable form of valve-gearing, shown only on the central cylinder for the sake of simplicity, this valve-gearing being of the automatic-releasetype and controlled by a ilyball governor D, the same having a hydraulic attachment E for controlling the speed of the' engine in accordancewith the pressure in the pump or mains. The features of this combined iiy-ball and hydraulic governor are claimed in my copending application, Serial No. 77,065, filed September 30, 1901, and the same will not be herein referred Since the valve-gearing itself is not a part of my present invention, its internal constructionhas not been shown and the same will not be described in detail, as any suitable form of valve gearing may be used. As

water and an outlet K therefor. vconnecting the steam-cylinders and pumps are suitably connected to each other in theusual manner by piping I with an inlet Jvfor The frames are of special construction, designed for lightness and strength and to reduce the space oc- ;cupied by the engine as a whole, and especially to bring the pumps closer to the steamcylinders than is obtainable in the ordinary forms of horizontal pumping-engine.

The central engine-frame L isl provided with arms L', suitably connected to the central pump-casing, and these arms L' are supported upon pedestals P, while'between the pedestals and the central steam-cylinder are pillars O, which serve'to steady and support the main frame ofthe engine. The frames of the engines, as described, are of what may be termed the s girder type, and the frames connecting the outerv steam -cylinders with the outer pump-casings have arms Q connected to the pum p-casings H and supported uppn pedestals P', with pillars, as before, between the pedestals and steamcylinders. Other girder connections Q connect the main portions of the-outer frames with the pump-casings. By thus arranging the frames the pumpcasing may be brought close up tothe pedestals in such manner as to greatly reduce the necessary length of the engine.

The main shaft G is carried in bearings G' in the pedestals P P' close to the inner ends of the pump-casings, while fly-wheels R are arranged on the main shaft and between the pumps. the main shaft between the engines and pumps .with the fly-wheels between the engine-frames the width of the engine over all may be greatly reduced, and a close compact arrangement is provided of light and strong parts,which reduces the weight, and the whole arrangement tends to reduce vibration. The particular form of the engine-frames is not part of my invention, and any suitable form may be used, the castings being made of different shapes, as desired.-

rIhe cranks R on the main shaft are preferably set at one hundred and twenty degrees By this arrangement of supporting apart, and connecting-rods T, as shown, connect with the engine cross-heads, while the steam-cylinders are provided with the usual piston-rods T and pistons T2. The pumpcylinders in the pump-chambers are also provided with plungers U and plunger-rods U', connected to cross-heads U2. The plungers are preferably single-acting and are driven from connections with the engine cross-heads Vin such manner that the strain upon the pump-plungers is compressive, while that on the connections is principally, if not entirely, tensile when pumping is being done. In other words, the work is done with a pull or tension between the engine and pump cross-heads and with a push or compression on the plunsers. o Suitable operative connections are made between the engine cross-heads D and pump cross-heads U2. As shown, connecting-rods W form these connections. These rods are connected to the engine cross-heads at diagonal points, and they are also connected to the pump cross-heads at diagonal points respectively opposite the points of connection to the engine cross-heads. As shown in Figs. 3 and 4, the rods W are connected to the cross-headV on a diagonal line by arms c,and they are also connected to the cross-head U2 of the pump on adiagonal line by arms d. The rods IV extend then from the engine crossheads in the direction of the water end of the engine, one of these rods preferably extending above and the other below the engineframe in order to clear the main shaft, and they pass through bearings in casings and the pump, respectively, the rods passing through casings or sleeves e, placed within the pum pchambers, so that the rods are not in contact with the water and no stuffing-boxes are necessary where they enter and leave the chambers. By this arrangement of rods it will be seen that all the operative parts of the engine are left clear for operation and the connecting-rods T operate between the rods W, while at the same time the cross-head V is arranged within the engine-frame. As before stated, the pump-plungers are single-acting and the rods W are connected to their crossheads in such manner that water is only being pumped upon the outstroke of the steampiston or while the steam-piston is traveling in a direction away from the pumping end of the pump. By this arrangement it will be seen that all the strain on the rods W in pumping is principally tensile, no work being done by the engine when the pump-plunger is lling its cylinder with water, at which time there would be a compression upon the rods. A great deal of the vibration in the rods W is thereby avoided, which also tends to reduce the vibration in the engine. By passing the rods WV through the pump-casings vibration is also reduced, space is saved, and the number of parts reduced.

In order to provide a suitable engine crosshead for my pumping-engine, I form the inner sides of the engine-frame with longitudinal ribs or guides X, while grooves or recesses X are formed in the cross-head to fit the tongues or guides X, so that the crosshead may slide thereon, and I have found this to be an effective construction, enabling me to utilize a very light engine-frame.

It will thus be seen that according to my invention there are a plurality of steam-engines arranged side by side, with a corresponding number of single-acting pumps each opposite 'one of the engines. Between each steam-engine and pump there is one engine cross-head,

because according to my construction but onecross-head is necessary, as I entirely dispense with the second cross-head, which is found in ordinary constructions. Between the cross-heads and pump-chambers is arranged a crank-shaft, and since I have dispensed with the second cross-head the pumpchambers are brought in close proximity to the crank-shaft and bearings, it only being necessary to leave sufficient space between the crank-shaft and pump-chambers to admitof the revolution of the cranks. By this construction it will be seen that I greatly reduce the length of the engine, and by using a plurality of single-acting pumps the effect on the water-column is the same as though the engine were double-acting. Where three Steam-engines are used, as in this instance, the cranks are arranged on the crank-shafts one hundred and twenty degrees apart, for by this arrangement the load on the engine is balanced throughout the revolutions, the work being done upon the instroke of the pump-plungers. Fly-wheels are arranged on the crank-shaft between the engine-frames and extending between the pump-chambers, and connecting-rods extend from the engine cross-heads through bearings in the pumpchambers and are connected at the rear of the pump-chambers to cross-heads attached to the pump-plungers, whereby the strain on the said connecting-rods is wholly tensile.

Without limiting myself to the precise details of construction and arrangement shown and described I claim, and desire to secure by Letters Patent, the following:

1. The combination in a steam pumping apparatus, of a plurality of steam-engines side by side, a cor-responding number of singleacting pumps each opposite one of the engines, one engine cross-head between each steam-engine and pump, a crank-shaft and bearings therefor between the pump-chambers and cross-heads, the pump-chambers being situate in close proximity to the said crank-shaft and bearings, cranks connected to said crank-shaft and arranged at one hundred and twenty degrees apart, whereby the load on the engine is balanced throughout the revolutions, iy-wheels arranged on the shaft between the engine-frames and extending between the pump-chambers, and connecting-rods extending from the engine crossheads through bearings on the pump-cham- IOO IIO

bers and connected at the rear of the pumpchambers to cross-heads attached to pumpplungers, whereby the strain on the said connecting-rods is wholly tensile, substantially as set forth.

2. The combination in a steam pumping apparatus, of a plurality ofstean1-engines side by side, a corresponding number of singleacting pumps each opposite one of the engines, a crank-shaft and bearings therefor between the pumps and engines, and located'in close proximity to the` pump-casings, the cranks connected with the cross-heads of the engines, and connecting-rods extending from the engine cross-heads through sleeves extending through the pump-casings and connected at the rear and outside of said pump-casings to cross-heads attached to the pump-plungers whereby the strain on said connecting-rods is wholly tensile, substantially as set forth 3. The combination in asteam pumping apparatus, of a plurality of steam-engines side ranged in pairs diagonally one above and the by side, a corresponding number of singleacting pumps each opposite one of the engines, a crank-shaft located in close proximity 25 to the pumpcasings with the cranks connected to the cross-heads of the engines, plungers extending through the opposite heads of the casings and connecting-rods ar- 3o other below the crank-shaft and extending from the engine cross-heads through the pump-casings and connected at the rear and outside of said pump-casings to cross-heads attached to the pump-plungers, substantially 35 as set forth.

In testimony whereof I have signed.A my name to this specification in the presence of two subscribing witnesses.

JOHN A. GROSHON.

Witnesses: l l

CEAS. C. GILL, GUNDER GUNDERsoN.