US851364A - Centrifugal pump. - Google Patents

Description

UNrrEn 'srA'rEs PATENT fELoE or rruEN'roN, NEWV JEirsEY, AssieNoR 'ro THE JEANEsviLLE IRON wenns coureur, or i-iAZLE'roN, PENNSYLVANIA, A. coRPoRA ;1T1O'N sereinement Application filed April T @ZZ whoml t mayconccrn:

Be itlmown'that I, ELOF MEDEN, a sub ject of the King of Sweden, residing in the city of Trenton, in the county of Mercer,-

'compound centrifugal-pump provided with my invention. In this .instance I havel illustrated the pump as .constructed withf four stages, `but it will be understood that more or fewerinay be employed as desired.

Thev runners or iinpellers,whichare marked A,`A,' A2, A, are mounted upon the main shaft' S so as to turn therewith, and this shaft runs in bearings B, B', carried by the casing C. u The suction inlet for the water is at D andthe outlet is atvtlie opposite eiidof the casing as lindicated by the dotted circles E in the figure.

Between the impellers or runners A, A",

vare the series'of stationary partitions G and H, forming channels F, F', F2, leading from the periphery of vone iinpeller to 'near the hub ofthe next, as usual. tween each impeller (A for example) and the succeeding set of channels (F), preferably, extends down to the hub of the next following impeller (A), so that each impeller has all its effective parts running within its own chamberu. The pressure in each chamber a in which an impeller runs is approximately charges its water at its periphery, and as that is greater than at the point where the vwater enters that im eller, it follows that there will I form or secure in the inner face of the rear The partition G be-` S'pecication of Letters Patent.

5,1905. Serial' No. 253,979.-

that at the point where that iinpcller di-s- CSENTRlFue/ii. PUMP.-

Efatented Apr/i1 23, 1907.

end of the casing C a hollow ring J of a diameter, which may convenientlybe about equal sion side of imp'eller A, where it projects through the partition II. An annular ange t3 on the adjacent face of this iiiipeller forms a lap joint with the forward face of thisA ring 'iSS to the diameter of the ring face of the admisso that these two parts form the three sides of a chamber K, whose fourth side is closed,

by the shouldered endv or plug I of a sleeve O,

which is mounted on and turns with the shaft S. This sleeve has a screw thread connection with the shaft ata: so that by turning thev sleeve onA the shaft, the sleeve andl its sliouldered or plug end can be adjusted on the shaft; and this can be done from the outside of the casing forthe sleeve projects through a stuifing box R in the end of the casing. A lock nut p may be used to lock the sleeve in its adjusted posit-ion.

Back of the chamber- K is chamber M, .i

this trapped body ofwater .will take the end thrust. V

If there is end tl cum'ulation of leakage of water into it from the chamber lin which the last iinp elle1"ruiis,I the' shaft will carry the. plugl) to the right 'ust to the right from ex' cess of pressure in the chamber K, due to ac.

sufficiently to momentarily open the. chamber K to the chamber M, and, so allow. the excess to escape from the chamber K. The passage N to the suction affords a convenient channel for-carrving oil' these intermittent discharges -of'excess pressure from chamber K.1

I -prefer to form the sleeve -O of phosphora bronze, so that iii addition to the fact that it enables the plug lj to be adjusted readily` from outside therasing, it may protect the shaft fizoinA the actionl of acidulous water when the pump is used in mines or elsewhere. I claiin'as my invention ioo j l. In a multistage centrifugal pu'rnp, thev combination of aeasing, a shaft, a series of impellers on the shaft and aA chamber at the delivery end of the casing, open to a part'of the rear face of thelast iinpel er with a Sleeve tof,

secured on the shaft extending'to the outside l the inside providing a plug to open o1` close of the easing' and on theinside providing a 3 said elieinberhy longitudinal movement of plug to open or close L"sjilidv.chamber by longithe shaft. tudinal movement of the shaft. L

,2. In a multistage 'centrifugal pump, the@ name to this specification, in the eolnbination of a easing, a' shaft, aseiies of two subscribing Witnesses.

4presence of inipellers on the shaft and a chamber at the ELOF .MEDEN l delivery end ofthe easing open to a part of the rear fe'e of the last iinpeller with a sleeve i IVitnesses:

secured to and adjustable on the shaft and eX- l C. SEDGWIGK, tending to the outside of the casing and on HUBERT I-IOWSON.

In testiinony'whereof I ha-ve signed my 15v

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