US1231310A - Pumping system. - Google Patents

Description

H. B. TAYLGR.

PUMPING SYSTEM. APPucATmN miv sumas. i914.

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TAYLOR. "PuMPlNG SYSTEM. APPLICATION FILED SEPT. 29. |914.

1,231,310. v PmntedJune 26,1917.

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H. S. YAYLOR.

PUMPING SYSTEM.

APPLICATION FILED sEPT.29,1914.

1,231,316 Pafented June 26,1917.l

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www0/.mcy nwutu UNITED sTATEs PATENT oEEioE.

HARVEY BIRCHARD TAYLOR,- 0F PHILADELPHIA, PENNSYLVANIA.

PUMPING SYSTEM.

. Specification of Letters Patent.

i Application led September 29, 1914. Serial No. 864,046.

To all whom it may concern.'

Be it known that I, HARVEY BIRGHARD TAYLOR, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania,

havev invented certain new and useful 'Imf large volumes of water under., relatively low head, but which when submerged vrequire the pumps to handle water against a greater head, but not necessarily in the same volume.

According to this invention, I accomplish this result by modifying the connections between the several stages of a multi-stage pump by means of a novel valve mechanism especially adapted for the conditions in submarine vessels. An ordinary multi-stage pump -with the stagesconnected in series will discharge a relatively small amount of water against a high head, while by connecting the stages in parallel, a relatively large volume of water can be discharged against a smaller head, with about the same consumption of power. But the problem is to devise a simple and reliable valve mechanism whereby the connections from series to parallel, or parallel to series, can be quickly and easily made, and which valve mechanism will not require excessive space,

or be objectionably heavy. In providing a valve mechanism which meetsfthese conditions desired for pumps of submarine vessels, I have also devised a valve mechanism whereby an intermediate volume of water can be handled against an intermediate head, by connecting the stages of a pump in seriessparallel. This does not increase thecomplexity -of the valve mechanism, and provides an extremely elastic range of operation of the entire pumping system. A

In the embodiment of the invention shown herein, 'there is provided in connection with a multi-stage pump of a suitable design, si-

multaneously operable rotary valves, one controlling the connections on the suction sides of the several stages, and the other con trolling the connections on the discharge sides of the several stages. At one position of the rotary valves, the stages will be connected in series, for handling water against4 the maximum head. At another position the stages gill be connected in parallel to handle the largest volume of water against the minimum head, and at a third position the stages will be connected in series parallel to secure the intermediate condition.

Patented June 26, 1917. l

The valves are preferably interconnected by gearing controlled by a hand-wheel, so that they will always be in proper relation to each other and to the several to and from the several stages.

In the accompanying drawings, y Figure 1 is a cross section through one ports leading of the stages of a centrifugal pump with the valves in the series the line 11 of Fig. 3;

Fig. 2 is a developed longitudinal section on the line A-BC-D-E of Fig. 1;

Fig.'3 isa plan View; Fig. 4 is a sectional view showing vthe valve connections for series parallel, and

Fig. 5 is a similar view showing the Valve positions for parallel connection.

position, taken on 1 represents the casing of a centrifugal "A pump having four stages. 2 i's a. motor which drives the impeller shaft 3, l is the suction pipe and 5 a discharge pipe. The impeller shaft 3y passes through the usual of the casing and is provided with aball thrust bearing 7. Thefqparticular construction of the pump is not a part of this invention, but the pump shown is preferably .stuing box and bearings 6, 6, at both ends l acentrifugal pump of any desired number 1 `f of stages, in which the impellers 8 are all mounted on the shaft 3, and comprise suitable moving vanes which co-act with stationary vanes 9. The vanes 9 are disposed between the periphery of the impellersS and the peripheral discharge chambers 10 of each stage. Each stage is also provided with an inlet chamber 11 which leads tothe center of each impeller 8.

. AWhen the stages are connected in series, the water passing in at 4 Hows through the inlet 11 of the first stagethrough the impeller 8 ,and the fixed vanes 9 to the discharge chamber 10 thereof, thence the water enters the inlet 11 of the next stage, and so on until it has passed through all of the stages and is discharged through the outlet 10 from the last stage into the discharge "l`he work done by each stage is substantially equal, and the total head overcome is that due to the sum of the heads overcome by eaeh stage. or the difference in head between the suction end l and the discharge end 5. T his position is illustrated in Fie'. 2.

The valve mechanism consists of a rotary multiple position inlet valve 15, and a similar outlet valve 16. These valves are respectively contained in casings 17, 1S, symmetrically disposed below the pmnp casing 1. llach valve is carried by a separate shaft 1S), Q0, which carry gears 21, Q2 meshing with an operating pinion 23. The operating pinion 23 is carried by a shaft 24, which may be operated by a hand-wheel or other suitable power.

The inlet Valve 15, see Figs. 1 and 2, cousists ot three longitudinal chambers 26, 2T, Q8, separated by a triple partition wall Q0. ln Fig. 2, it will be seen that the inlet alve l5 is shown in vertical section on the line A B. with the series inlet chamber Q6 con nected to the inlet 11 of the, first pump stage through port 30. This port 30 is shown in the dotted linesin Fig. 1, as it is behind the portion of' the valve 15 through which the section ot' Fig. 1 is taken.

The outlet valve 16 differs in detail from the. inlet valve, as its functions are substantially the reverse of the inletvalve. 'lhe outlet valve 16 comprises intermediate series chambers 33, 33, 33, 34, which, in the positions of Figs. 1 and 2 connect the outlet chambers 1() of each stage with the inlet chamber 11 of the succeeding stage, and the outlet 10 of the final stage is connected through port 3J. with the discharge 5. Thus, the chamber 26 of the inlet valve 15 cooperates with the passages or ports 33, 34, of the outlet valve 16 when the stages are connected in series.

The outlet valve has a parallel discharge chamber 36 provided with a port' 37 for each stage. so that when the parallel inlet chamber 27 is in position so that its ports 8S communicate with the inlets 11, to the several stages. the outlet valve '16 is n position so that its ports 37 comn'muicate with the outlets 10 from the several stages. Thus, parallel operation ot the stages is secured` and a large'volume of water is handled at the head due to one stage.. This position is shown in Fig. 5.

To seo-'ure an intermediate volume ofI discharge. at an intermediate head the series parallel arrangement ot' Fig. t isemploved. The chamber 27 ot' inlet valve 15 is provided with a series port t() which is angularly displaced from the parallel inlet ports 3S. port J.0 being in line with an additional series port 41 in chamber 28. Thereby, the suction l is connected in parallel to the inlets 11 ot', for example, the first aml third stages of a four stage pump. At the same time.I the outlet valve 16 is in such position that the first and second stages are placed in series with each other by a passage lil in outlet valve 16, and the third and fourth stages are also in series by a similar passage il. At the same time. the discharge from stages 1 and 2 is connected t0 chamber 36 by passage 45 and that fromstages 3 and '-t by passage 46. 'Elms the pressure is equal to twice that ot' one stage, and the volume handled is equal to twice the volume handled by one stage, with this series parallel arr: ngement ot' stages. lt will be understood that the invention is not to beh restricted to any particular type ot pump, nor to any particular number et stages. and it will beI seen that with a greater number ot` stages not only could the extremes' due to series and parallel connections ot the stages be obtained, but by difterent series parallel groupings of intermediate stages more interi'nediate volumes and pressures could be obtained by properly designing the valves to give the desired groupings ot' stages. It' the number of revolutions be assumed to be 1800, and the stages be designed to give 200 gallons per minute against a head of 300 feet when in series, in parallel, at the same number of revolutions approximately S00 gallons per minute 4 would be delivered against a head of 75 100 feet. and in series parallel approximately 400 gallons per min-nte are delivered against a head ot 15() feet. lVth each ot' these arrangements and with the proper design of pump. extremely eflicieut service will he se 105 cured, and the power required to operate the pump at the point of maximum efficiency for any otl thc several conditions does not greatly vary as the head and quantity inversely vary. The cylindrical interconnect- 110 ed valves disposed close to the pump casing and parallel to the pump shaft in the same casing are esl'iecially advantageous by reason of their relatively small size t'or the results accomplished. It will be observed that the 115 valve chambers are ot' unequal volumes, those tor the parallel flow being! largest, and thostl tor series flow smallest, while those for series parallel flow are of intermediate volume corresponding to the How to be car 120 ried. hforeover. they are naturally approximately balanced againstwater pressure so that excessive, power is not required to operate them even under heav)v pressures. ll'hile the invention is particularly useful 125 in a submaripe vessel. it. is useful in all other relations where it is desired to economically handle varying quantities ot water or other fluids against varying ncads.

Various modifications and changesinayaw be made in the specific embodiment ofthe invention herein illustrated and described,

' passages for the entering fluid.

2. A rotary valve for a multi-stage pump comprising a hollow cylinder open at one end and having peripheral recesses to pass theyliquid, and an aXial partition dividing said cylinder and said recesses into separate passages for the fluid.

8. A valve for a multi-stage pump rcomprising a hollow cylinder open at one end and having peripheral ports to pass the liquid and separated longitudinal passages connecting said ports to the open end of the cylinder. A

4. A discharge valve for a multi-stage pump comprising a hollow cylinder open at one end and having peripheral ports to pass the fluid, and partitions for separating said ports into different combinations.

5. A valve for a multistage pump coniprising a hollow rotatable cylinder being open at one end and having peripheral ports and partitions separating said ports into groups.

6. In a multi-stage pump, the combination with a plurality of impellers, of a cas- -ing therefor, an inlet valve common to said impellers ,and comprising a hollow cylinder receiving the i'luid at its end and discharging it through peripheral ports, and a wall in said valve dividing it into longitudinal chambers to control the supply of said impellers in a plurality of combinations.

7. In a multi-stage pump, the combination with a casing supporting a plurality of impellers and having inlet and exhaust passages therefor, of valve housings parallel to the aXis of said impellers and having openings communicating with said inlet and eX- haust passages, and valves in said housings controlling the flows through s aid impellers in a plurality of combinations and comprising open ended hollow cylindrical members receiving and discharging the entire inflow and outow through the pump parallel to the aXis of said impellers vin all of said combinations.

8. In a multi-stage pump, the combination of a series of stages, an impeller for each stage, a casing-having a passage for each stage, a valve controlling said passages for grouping said stages in a plurality of combinations comprising a hollow movable cylinder having longitudinal chambers, and

peripheral ports for each chamber coperating with said casing passages to vary the connections between said stages, said chambers being connected to one end of said valve.-

9. .In lcombination with a `multi-stage pump, a rotary stage controlling valve having chambers varying in volume according to the flow to be controlled-- Vl0. In combination with a multi-stage pump, a rotary stage controlling valve having longitudinal chambers varying in "volume according to the flow to be controlled.

11. In a multi-stage tion with a longitudina serieso impellers, of a housing therefor having inlet and `outlet passages for [the flows through said impellers, cylindrical valve chambers -having peripheral ports communicating Lwithsai'd. passagesl and open at one end for-passing the liquid, and movable valves in said Chani-` bers for controlling `the flcliiv` through the' impellers 4ina plurality of combinations and ump, the coinbiiaformed to connect all the flows to saidopen ends oifLLid valve chambersin all of said combinations. y

12. Ina multi-stage pump, the combination with a casing having three compartments substantially tangent .to each other, of hollow rotary cylindrical valves in two of said compartments, driving wheels on the shafts of each of said valves and a central pinion engaging said wheels to rotate said valves. y y

13. A pump comprising a series of centrifugal impellers, a substantially cylindrical casing for said impellers having inlet and exhaust passages at the sides thereof, open ended valve housings beneath, parallel with, and supportingsaid impeller casing and having openings communicating with the'inlet and ,exhaust passages ofthe impeller casing, .open ended valves in said housin s adapted to'receive the entire iniow o liquid through the open end of one valve housing, to control the fiows through the impellers in a plurality ofcombinatio'ns` and to discharge the entire outflow at an open end of the other valve housing.

14. A pump comprising a series of centrifugal impellers, a substantially cylindrical casing for said impellers cast in two parts consisting of an integral base portion having inlet and exhaust passages at the sides thereof for the impellers and an integral cap portion mating with said base portion to form a housing for all of said impellers, open ended valve housings beneath, parallel with, and supporting said impeller casing and having openings communicating with the inlet and lexhaust passages of the impeller casing, open ended valves in saidhousings adapted to receive the entire inliow of liquid through the open end of one valve housing, to con-4 entire out-flow at an open end of the other valve housing.

l5. A pump comprising a series of centrifugal impellers, a substantially cylindrical casing for said impellers cast in two parts consisting of an integral base portion having inlet and exhaust passages at the sides thereof for the impellers and an integral cap casting mating with said base portion to form a housing for all of said impellers,'

open ended valve housings beneath, parallel with, and supporting said impeller easing and having openings communicating with the inlet and exhaust passages of the imeller casing, at least one of said housings eing cast integral with said base portion of the impeller casing, open ended valves in said housings adapted to receive the entire inflow of liquid through the open end of one valve housing, to control the flows through the impellers in a plurality7 of combinations and to discharge the entire outflow at an open end of the other Valve housing.

comprising a series of centrifugal impellers on a common shaft, inlet and exhaust valves parallel to said shaft for controlling the flows through said impellers in a plurality of combinations, and a casing for said irnpellers and valves having inlet and exhaust passages and consisting of an upper impeller housing having a lower integral base portion for all of said impellers and an integral cap portion mating therewith, and lower cylindrical valve housings substantially tangent to each other and tangent to and integral with said base portion of the impeller housing.

In testimony whereof I afix my signature, in presence of two witnesses.

HARVEY BIRCI-ARD vTAYLOR.

Witnesses. y CHAs. T. TAYLOR, IsAAo H. WRIGHT.

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