US990507A - Centrifugal, turbine, and similar pump. - Google Patents

Description

suLzBRf CBNTRIFUGAL, TURBINE, AND SIMILAR PUMP.

APPLICATION FILED MAR. 28, 1910.

Patented Apr. 25, 1911 www@ 2 SHEETS-SHEET l.

AV y illf G.' SULZER. 1 GENTRIPUGAL, TURBINB, AND SIMILAR PUMP.

APPLICATION FILED MAR. 28, 1910v Patented Apr. 25, 1911.

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i o all whom itam/ay concern:

l season UNHCR@ @A a'r i o.)

OF NEW YORK,'N. Y., A CORPORATION OF NEW JERSEY.

GENTRIFUGAL, romains, AND sns/11min PUMP.

Be it 'known that 1, GEORG SULZER, a citizen of Switzerland, residing at Harrison, county of Hudson, and State of New Jersey, have invented certain new and useful Improvements in Centrifugal, rPurbine, and Similar Pumps, fully described and -represented in the following specification and the accompanying drawingyforming a part of the same.

This invention relates to an improved construction for centrifugal', turbine` or similar pumps of that typeknown as multi-rotor' pumps, in which a number of impellers are arranged side-byside and operate in parallel, as distinguished from multi-stage pumps in which the impellers operate in series, the especial object of the invention being to simplify and cheapen the manufacture of such pumps while securing large capacity and high efficiency.

The invention is especially intended for pumps having small impellers, so that the latter can be run at a very high rate of speed, as, for-instance, when the impellers.

are directly connected to a steam turbine or other high speed motor, but may be used with impellers of any size.

The invention consists in various features of construction and combination of parts,I

as fully described and particularly claimed hereinafter.

' In the accompanying drawings forming part of this specication, the invention is illustratedas applied in preferred forms in a pump having volute diffusing chambers and aA pump having diffusing vanes, and

these constructions will now be' described in detail and the features formlng the .1nvention then specifically pointed out in the claims.

In the drawings, Figure 1 is a central, longitudinal section of a pump with diffusing chambers. Fig. 2 is a cross section on the line 2 of Fig. 1. Fig. 3 is a central, longitudinal section of the casing. Fig. L1 is a View similar to Fig. 1 showing a pump with diffusing vanes. Fig. 5 is a cross sectionv of the pump shown in Fig. 4, the section being taken one-half through a delivery section and one-half through a srction section. Fig. 6 is a central longitudinal section of the casing of Figs. t and 5.

Referring now particularly to Figs. 1, E

Specification of Letters Patent.

and A is a cylindrical casing having-0n Patented Apr. 25, 1911.

Application filed March 28, 1910. Serial No. 551,964.

-GEORG SQLZER, OF HARBISON,-`NEW JERSEY, ASSIGNOR TO HENRY R.. WORTHINGTON, v

the side the suction connection B and de- 4' livery connection C for the suction and discharge pipes, and open at the ends. to receive the heads ,D by. which the. pump casing is.closed and all the parts of the pump Vsecured together. The casing A has interior ribs 10 the inner surfaces of vwhich receive the outer edges of the pump sectionsso that the sections may readily be inserted and removed and proper joints formed without finishing the whole inner surface ofthe cylinder. Across the suction anddelivery the ribs 10 are preferably connected impairs by .webs 11, 12, the webs 11 forming guides for the liquid tothe suctions f the respective impellers, and the webs 12 forming similar guides for the liquid from the diusing chambersto the delivery, these. ides securing the proper flow of the liquid and.`

increasing the efficiency of the pump. Within the casing A are arranged impellers F, three impellers being shown, these impellers being carried by shaft G, and being of the double suction type, that is, provided with,

suction openings on opposlte sides. Outside the impellers are the diffusing chamber sections H' through which .the impellers deliver, t-hese being shown as formed to `pro vide the usual volute diffusing chambers 13 and between these delivery or diffusing sections are suction and partition sections I, which have walls 14 extending inward to sleeves on the shaft G and dividing the-adjacent suction chambers and passages, 15 of the successive impellers. These suction sec-V tions are formed with side shoulderswhich form running joints-,1, with lthe impellers, the running joints 1 for the outer sides of the -end impellers being formed by 'similar shoulders lon the heads D. 'These difusin chamber sections H and partition sections? are preferably formed with interlocking shoulders as shown, so asto form tight joints when pressed together, and arenished on their outer surfaces 4sc as to form proper joints with the surfaces on the innerV edges of the ribs 10, the sections I being preferably provided with side shoulders 2 finished to engage the ribs 10 so that the whole outer surface of the section need not be finished. The suction sections I have interior Walls 3 inclosing the suction passages 15 and extending upward from the opposite sides of the suction B, these walls 3 extending Aabout the impeller suctions and forming, as shown, the

common double volute chamber about the y impeller suctions. The suction passages 15 are all formed in the sections I, except the suction passages for the outer side ofthe end impellers which are formedin the heads D, the passages in the heads being provided with Walls 3 of thel same form as in the sections I. Y

The method of assembling the parts vwill readily be understood from lthe drawings, the impellers, delivery or diffusing chamber sections, and suction or partition sections being assembled on the shaft and inserted in the casing A, and the pump heads and all the parts being secured together within the casing by the bolts 5 passing through the heads and pump sections, as shown clearly in Figs. 1 and 2. 'l

The casingv A obviously may be used with I different impellers, it'being necessary 'only to change the other parts according to the impellers used, the casings remaining,v unchanged. Thisvprovi'des a standard casing which may be used in making up pumps for different. conditions.

Referring now to Figs. 4, 5 and.6, in which the invention is shown as applied in connection with a turbine pump employing diffusing vanes, the general arrangement of the parts and the'form of the casing is substantially'the same 'as in the construction shown in Figs. l to 3, except as modified for useof the diffusing ringsshown. In place of the vclute'diffusing chambers H, however, diii'usion rings Kare inserted between the suction sections I and between the end suction sections and the' heads, these diffusion rings having diiusing vanes a, which may be of any suitable form, and are shown as of a well known type. The diffusion rings K in this construction form the delivery sections and are held in place by, and make tight `joints with, the suction sections and heads, the parts being provided with shoulders for this purpose, asin the construction previously described. In this construction, however, an inner casing 16 is used, extending about and inclosing the pump sections, this casing being formed integral with the 'outer casing and vhaving downwardly extending walls 17 running longitudinally of the pump and merging into' the outer casing at the opposite sides of vsusction B and forming suction chamber 18 for theimpellers, and this inner casing 16 also has downwardly extending walls 19 running transversely to the pump and forming delivery chambers or passages extending through the suction portion of the pump, forming continuations of the delivery chamber 2O surrounding the casing 16.. The casing 16 has openings 4 opposite the diiusing passages between thevanes a, through which therein, delivery sections surroundi'n 'openings 4 the liquid passes from the diftion sections I and form continuations of the side walls 17 on the casing, as shown in Fig. 5. rIhe ribs 10 with their finished surfaces Vare formed on the inside of the inner casing 16, and these ribs form bearing surfaces for and joints with the'linished surfaces on the outer edges of the suction seCtiOnsI, as in the construction previously described. y

`The parts of the pump shown in Figs.v 4 to 6 are assembled and secured together'in the same manner as in the pump shown in Figs. 1 to 3, and the casing may be used with different impellers, as in the construction previously described, it being necessary only to change the diffusion rings according to the impellers used.

It will be understood that the invention is not to be limited to the exact form or arrangement of parts in either of the construe tions shown, but that modications may be made therein while retaining the invention defined by the claims.

1. In a centrifugal or similar pump, a cylindrical open ended casing having suction and delivery connections on the side, in i combination with a plurality of impellers said impellers, suction sections between said delivery sections forming suction passages for cylinder ends, and means for securing the pump 'sections and heads together within the" casing.

2. In a centrifugal or similar pump, a cylindrical openrpended casing having suction and 'delivery'connections on Y, one side, incombination with a plurality of double suction impellers therein, delivery sections surrounding said impellers, suction sections between said delivery sections foi-'min suc- 4successive impeliers, pump heads closing the tion passages for adjacent suctions oI successive impellers,

pump heads closin the cylinder ends and g providing suction passages for the outer sides of the end impellers,

and means for securing the pump sections and heads together within the casing.

3. In acentrifugal or similar pump, a cylindrical open ended casing having suction and delivery connections on the side, in combination with a plurality of double suction impellers therein, delivery sections surround ing said impellers, suction sections between said delivery sections forming suction pas-l sages for adjacent suctions of successive impellers, pump heads closing the cylinder ends and providing suction passages for the outer sides of the end impellers, and means for securing' the pump sections and heads together within the casing, said casing havleo . impellers therein,

ing formed integral therewith walls dividing the suction and force chambers of the pump and walls forming delivery passages extending through the suction chamber.

4. In a centrifugal or similar pump, a cylindrical open en' edV casing having suction and delivery connections on the side, in combination with a plurality of double suction diffusion sect-ions sur'- roundinv said impellers having diffusing vanes with diiusing passages between them, suction sections between said diffusion sections forming suction passages for adjacent suctions of successive impellers, pump heads for closing the cylinder ends, said casing having integral therewith an inner casing surrounding the pump sections and formed with openings opposite the diffusing passages and walls dividing the suction an force chambers of the pump and `forming delivery passages extending through the suction chamber.

5. In a centrifugal or similarv pump, a pump casing having suction and delivery connections at terior walls dividing the casing into a suction chamber of substantially the width of the suction inlet and extending through the length of the casing and a ldelivery chamber for a arallel with the casing, and having interior walls forming delivery passages for the' impellers extending through the suction chamber.

6. In a centrifugal or similar pump, a pump -casing having suction and delivery connections at opposite sides and having interior walls dividing the casing-into a suction chamber of substantially the width of the suction inlet and extending through the length of the casing anda delivery chamber for a plurality of impellers and ha ving' interior Walls forming delivery passages ex,- tending through the suction chamber, in combination with a plurality of impellers and pump sections therein, and heads closing the opposite ends of said casing. A

7. A centrifugal pump casing consisting ot' an open ended cylinder having suction and delivery connections at opposite sides, and having interior walls dividing t-he casopposite sides and having 1n-' plurality oi' impellers operating ining into a suction and a delivery chamber for a plurality of impellers operating in parallel within said casing.

8. ln a centrifugal or similar pump, a pump casing consisting o an open ende cylinder having suction and delivery con\ nections at opposite sides, and having interior Walls dividing the casing into a suction and a delivery chamber for a plurality of impellers, in combination with a plurality of double'suction impellers operating in parallel within said casing, and heads closing the opposite ends of the casing.

9. A centrifugal or similar pump compris ing in combination a plurality of double suction impellers constructed to operate in parallel, a casing having supply passages for said impellers and having also a single discharge chamber inclosing all of said im pellers, diiuser's located between said impellers and discharge chamber and arranged to receive the discharge from said impellers radially and to deliver said discharge radi ally into said discharge chamber, said casing being adapted to receive interchangeably impellers and diffusers of different design and with the impellers of different diameters to suit different conditions. 10. A centrifugal or similar pump comprising in combination a shaft, a plurality of double suction impelle'rs thereon, and a casing having supply passages for said impellers and a single discharge chamber for said impellers and having, between said impellers and discharge chamber, diffuser passages arranged to receive radially discharge from said impellers and to deliver such discharge radially into said discharge chamber, said'casing having a free space outside of said diffuser passages to receive such discharge and adapted to receive interchangeably4 impellers and diiiusers o ferent design and with the impellers of different diameters to suit 'different conditions. In testimony whereof, I have hereunto set my hand, in the presence of two subscribing C. J. SAWYER.

Copies of this patent may be obtained for ive cents each, by addressing the Commissioner of Yatents,

Washington, D. C.

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