US1045432A - Automatic centrifugal pump. - Google Patents

Description

A, C. PULSMEIER. AUTOMATIC GENTRIFUGAL PUMP. APPLIGATION-IILED APRJO, 1912.

g. Patented Nov. 26, w12.

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specification of Letters Estant. Applicaton'ed April lo. 1912.

Patenten new? ee, rara'. Serial No. 689,779.

To au when amy colmm- Be it lnmwn that l, sinner 4J. Panne. Meran, citizen of the United States, resldin at Alameda, `in the county ott Alameda an .State ot California, 'have vimented new `and useful Improvements 4in Ihutomatic Centrifugal Pumps, of which the 'following is a specification. Y

This invention relates*fate centrifugal.

pumps and pertains especially tu,'imprealesv ments in.. the means for an au-tofmatic, balance.

ing drawing, in -whichrllhe vdrawing is a sectional vlew Illustratlng the Invention.

A islaJ pump casing. A

2 is the impeller havingV the radial discharge passages 3 opening into the volute 4 of the case. 1

5 is the shaft carrying the runner.

6 isy the suetion inlet.

-7 is avariable pressure chamber-formed on-the side of the runner opposite the suc-v tion between the adjacent wall of the case and an annular disk plate 8, which is removably secured 'to the back of the runnerA by suitable means as the screws 9.

10 is a vacuum chamber formed within the runner between the dish plate 8 andthe integral opposite wall of the runner; this vacuum chamber 10having a discharge into the runner through the 'ports 11. y p v 12 are pumping lvaines hy which the charnber 10 may be provided. The dish plate 8 lits snug against an annular frange 13. on the back of the runnenand which iange 13- forms the circumferential wall furthe vacuum chamber 10. vThe disk plate 8 has a peripheral' projection 14C beyond the flange 13 adapted to co-act with a xed ring plate 15 on the case, and re 11a-te the entry of water from the space o uncontrolled pressure 4: in the case into the variable pressure space 7. The inner edge of the disk plate 8 on the side opposite the fixed plate 1-5 is designed to co-act with the vertical surface 16 on the xed hub or hex of the runner shaft fue chamber 10.-

The operation is as follows: @neunte-oiled pressure water is prevalent on both sides of y lt finds its Way through a I thev runner. slight clearance between the stationary ring' 15 and therunner plate 8. rlhese two surfaces do not touch, a film of water under pressure separating the two faces.

is bac ofthe runner plate and the face 16 of the huh, so that the circumference of the runner plate, times the-thickness of the filml l ot'water between the stationary ring and ofthe parts and the'l runner plate represents the area through 'which pressure water finds its way into the variable pressure chamber 7, and, further,"l

amount of water must find its way back into the runner through the cent-ral port 17 into vacuum space 10, and thence through --theports 11 back into the main pumping ports of the runner'. To accomplish this, it is necessary to have su'ficie t clearance between the runner plate 8 ah the hub 16 to discharge an amount of water equal to that passing into the variablepressure chamber 7; thus, it isseen that apprximately if the runner plate should be 10 diameter andthe clearance between the runner plate and the stationary ring we must have about g1g clearance, should the diameter of the central port 17 5". The theory. is that the more clearance is given between the stationary ring 1,5 and runner plate 8, the more clearance it is' necessary to provide between the faces'cf the hub v16 and the back of the runner plate.- The runner will find some po-V The `amount of'clearance between these two fates governed oy the' clearance 'between the l sition between the face of the stationary ring 15 and the face of the huh 16 where the pressure in the variable pressure chamber will b'e such as to offset any pressure from the other lside of the runner, which would' tend `"to throw it out of balahce.

Having thus. described my inventioh what l.' claim and desire to secure by Letters Patent -isi r LA centrifugal pumpVconsisting--in the combination of a casing, a runner therein, the casing having a vsuction inlet and a peripheral discharge, 'the-runner having on the side opposite the suction an annular vacuum space formed by an annular flange on that side ofthecase and a disk plate se- .cured to the 'fiangethe central portion-of this plate extending inwardly toward the runner shaft, and coperating with a fixed surface concentric with and at right angles to the shaft, a ring plate on the case co-acting with an annular rim portion of said disk4 plate which projects beyond vthe annular flange, and which ring plate is on the side of said rim opposite to the said concentric fixed surface, said disk plate having a limited movement between said concentric surface and said ring plate, said-disk plate and the back of the casing inclosing an annular va riable pressure chamber through which the water circulates-from the space of uncontrolled pressure outside the runner and within the case through the running joints 'formed by said plates and surfaces, into the said vacuum space and thence back into the runner discharge. p i rA centrifugal pump consisting in the combination of a case, an inclosed runner vin the case having a suction inlet and a peripheral discharge, a variable pressure chamber` formed on the side of the runner opposite the suction and between the back of the' runneriand the adjacent -wall of the I n'ularprojection on the runner and between which annular `projection and'said ring plate a running'joint ina plane normal tothe shaft is formed.

In testimony whereof I have hereunto set- Y my hand in the presence of two subscribing witnesses. v ALBERT C; PAULSMEIER.- 'A Witnesses: l V l H. H. R. HUNT, R. N. Fono.

copies of this patent mayv 'be-.obtained for ve cents each; by addressing lthe v Commissioner or Patents,

Washington, D. .0.

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