US933681A - Centrifugal pump. - Google Patents

Description

J. VALK.

GENTRIFUGAL PUMP. APPLICATION FILED maf/,1906.

'Patented sept. 7, 1909.

wi h1 @aow l o Clttoznuo iAMns VALK, or TOPEKA, Kansas.V

CENTBIFUGAL PUMP.

Specification of Letters Patent. Patented Sept. 7, 1909.

Application lel December 7, 1908. Serial No. `166,3611.

To al whom 'it may concern:

Be it knownthat I, J AMES VALK, a citizen i of the United States, residing at Topeka, in

the county'of Shawnee andbtate of Kansas, have invented a new and useful Centrifugal lunip, of which the following is a specification. y

This invention relates to centrifugal pumps of that type utilizing Va revoluble 11npeller constructed to receive at its center the liquid to be forced and to discharge `the said liquid from the peripheryof the impeller along substantially tangential lines.

The object of the invention is to so con-4 struct and arrange the parts of the pump as yto reduce tothe minimum the resistance caused by the friction of vWater upon the iinpeller. i

Another obj ect is to provide means Whereby the passage of the Water or other fluid to be forced is subjected to the minimum resistance 4within the impeller.

A still further object is to provide novel means for coupling the pump to the suction pipe thereof, said means including a valve designed to automatically close when the pump is inactive.

With these and other objects in view the invention consists of certain novelV vdetails of construction and combinations of parts hereinafter more fully described-and pointedk out vinthe claims.

In the accompanying drawings the preferred form of the invention has been shown.

In said drawings z-Figure 1 is a horizontal section through a pump embodying the present improvement, the impeller being shown .partly in plan and partly in section. Fig. 2 is a section on line A-B F ig. 1.

Referring to the figures by characters of reference U designates the casing of the pump, the saine preferably consisting of similar spaced conical heads 1 and 2, each of which is surrounded by a flat annular portion 3 rounded at its periphery as indicated at 4, the two rounded portions being boltedv or otherwise secured together at their outer edges to forni a volute 5, from which the discharge pipe 6 extends. An opening 7 is formed at the apex of the head 2, and bolted to this head is a thinible 8 extending beyondy the opening and having an inwardly d-ireeted flange S) against which the head 2 abuts. This thiinble is exteriorly screwthreaded and is engaged by a coupling mein'- ber 10 into4 thc. outer end of which is threaded the suction pipe-*11 of the pump.

A ring 12 is secured within the coupling 10 and upon the endof the suction pipell, and

constitutes the seat of a ball valve 13 heldk against displacement by a spider 1&1 secured within the coupling k10. A ring 15 is threaded into the thiinbleS as shown particnlarly in Fig.2 and has an .inwardly directed flange 16 constituting an end bearing as hereinafter set forth.

` LExtending diametrically upon the concave l.face of the'head 1 is a cross-bar 17 in the middle portion of which is journaled a shaft 18.v This shaft has a pulley 19 at its Aouter end, while its inner end is provided with an angular head 20 located in the spacev formed between the two heads 1 and 2. 1t is of course to be understood that suitable means such as a gland 21 maybe provided ,for`

this extension communicates with the circular bore 23 through `a series of preferably three passages 25 formed within the conical portion" 21 and the annular portion 22 of the iinpeller, saidpassages being'curved. op`

positely to the direction ofrotation ofthe iinpeller so as to cause the discharge of .liquid from said passages along lines substantially,v

tangential to the direction of rotation of the iinpeller. Outlet openings 26 are formed in the periphery of the iinpeller at points between the. outlets of passages 25, so that the fluid after leaving' said passages will be directed longitudinally of the bore 23 until it reaches the nearest outlet opening 2G. A socket 27 is formed in the middle portion of the iinpeller and is designed to receive the head 20 of shaft 18. v

In operation the iinpeller D is rotated in any referred manner through the pulley 19 and the shaft 18, the direction of rotation being indicated-by the arrows in Fig. 1. The fluid to be forced is sucked through the pipe 11 and into the coupling 10 and thence through the. tubular extension 24, from which it is discharged by centrifugal force through the passages 25. These passages being curved in the manner described will di-` rect the fluid in streams along lines of least resistance, said streams entering the .circular core 23 and traveling theiein until they reach the nearest outlet openings 26, whereupon the liquid will be thrown outwardly into the volute 5, and thus discharged through the pipe 6., Importance is attached to the fact that the liquid upon entering'the impeller is not immediately deiiected along lines perpendicularto the aXis of the ini-- departing from the spirit or sacrificing thel advantages lof the invention.

Although the pump has been shown with the iinpeller disposed in a substantially yhorizontal position, it is to be understood that the same can be arranged in any other desired manner and it will operate asetiiciently in one position as in any other in which it may be placed.

What is claimed is 1. In a centrifugal pump an iinpeller having a conical central portion and 4a iiat annular portion, there being an inlet at the apex of the conical portion, and outlets in the periphery of the annular portion, said -conical portion having curved passages for conducting `fiuid from the inlet to the outlets, said passages communicating Within the iinpeller and adjacent the periphery thereof.

2. In a centrifugalpuinp a casing havin a cent-ral inlet and a tangential outlet, an an iinpeller mounted for rotationwithin ythe casing and having a conical central portion*l and a flat annular portion, there being a circular passage within the iinpeller adjacent the periphery thereof'and -means for conducting fluid along curved lines from the middle of the iinpeller to said passage, there being outlets within the periphery of the iinpeller and opening from saidA passage. l

if. [n a centrifugal pump a casing having a central inlet and a tangentialoutlet, and an impeller mounted for rotation Within the casing, said iinpeller consisting of a central conical portion and an .annular flat portion,

therebeing an inletat the apexeof thecon ical portion und vperipheral outlets, the iin-` peller having a circular passage opening into the outlets, and curved passages for coni ducting Huid from the inlet to the circular passage.

4. A centrifugal pump comprising a cas# ing having a central inlet and a tangential outlet, a valve for controlling the admissionv'of fiuid to the inlet,'and Ian iinpeller mounted for' rotation Within the casing and 'consisting of a `central"conica-l portionan'd an'` integral fiat annular` portion, there being anl inlet inthe apex of the conical portion and outlets within the peripheral portion of the impeller, said iinpeller having' a circular passage adjacent t ie periphery thereof and passages *for directing fluid along curved lines from the inlet to the circular passage.

5. A centrifugal pump comprising a vcasing having a, central conical portion and a flat annular portion'there being an inlety in the apex of the'- conical portion and a tan-- gential outlet in said annular portion, and an im'pellermounted for rotation Within the casing and consisting `of a central conicalv portion, and a flat annular portion, there heing an inlet within the apex of the conical portion and-outlets within the periphery of i the annular portion, and means for directing fluid along curved lines from the inlet and Within the iinpeller to the outlets, said means'communicating at points adjacent the outlets and Within the iinpeller.

6. A centrifugal pump comprisinga casing having a central inlet and a tangential outlet, and an iinpeller mounted forv rotation within the casing, said iinpeller havinga `central conical portion and a flat annular portion, there being an'inlet in thefapexof' the conical portion and outlets in the periphery of the annularlportion, said im'peller having a circular `passage therein opening" into the outlet, and passages for directing fluid along curved lines' from the inlet of. the impeller and through said impeller to thek circular lpassage at points between the outlets.

In testimony that I claim the foregoing as my own, I have hereto aiiixedmy signature in the presence oftwo witnesses.

Witnesses: Y

' JAS. M. WALKER, lJ. Ross CoLHoUN.

JAMES vALK. f

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