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Publication numberUS2285976 A
Publication typeGrant
Publication dateJun 9, 1942
Filing dateJan 27, 1941
Priority dateJan 15, 1940
Publication numberUS 2285976 A, US 2285976A, US-A-2285976, US2285976 A, US2285976A
InventorsHuitson Robert R
Original AssigneeGen Electric
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Centrifugal compressor
US 2285976 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

June 9, 1942.

R. R. HUITSON CENTRIFUGAL COMPRESSOR ITWQe ntOT; .Fiobert R. Huibson,

Filed Jan. 27, 1941 His Attorn ey.

Patented June 9, 1942 Robert a. Huitson, Rugby, England, assignor to General Electric Company, a corporation of New York Application January 27, 1941, Serial No. 376,223

--- In Great Britain January 15, 1940 1 Claim. The present invention relates to centrifugal compressors which have a diffuser formed by two spaced rings or walls surrounding an impeller. More specifically, the invention relates to. the type of compressors in which one of the diffuser walls is movably arranged tovobtain the best efficiency at varying load output. Ordinarily the diffuser rings or plates are spaced so that the angle of the fluid flow at normal load is greater than 20, preferably about 35 throughout the major portion of its travel. The angle decreases as the, amount of fluid delivered decreases and vice versa. In order to maintain said angle at the desired value one of the rings or walls of the diffuser may be made adjustable.

l5, which latter has a flanged outlet portion 2|.

7 In order to convert some of the velocity energy of the medium discharged from the impeller a ring or vortex diffuser is provided for receiving the compressed medium from the impeller andconducting it to the scroll Hi. This diffuser has two side walls, one formed by the aforementioned wall l3 and another side wall or ring 22 forming a ring space together'with the wall i3.

In order to adjust the spacing of the rings I3 and 22, means are provided for moving the ring The object of the present invention is to provide an improved construction and arrangement of compressors in which one wall of the diffuser may be readily adjusted to obtain best efliciency at varying load output. This is accomplished in accordance with my invention by the provision of a plurality of adjusting screws engaging one of the diffuser walls or rings and being coupled with a rack and pinion or like means for actuating the screws to effect movement of one wall towards and away from the other wall of the diffuser.

For a better understanding of what I believe to be novel and my invention, attention is directed to the following description and the claim appended thereto in connection with the accompanying drawing.

In the drawing Fig. 1 illustrates a sectional view of a. compressor embodying my invention; Fig. 2 is a side view of Fig. 1; and Fig. 3 isga enlarged detail view of Fig. 1.

The compressor as shown in the drawing has a casing partly formed by two inner walls Ill.

modating an impeller l8 secured to a shaft I!- having a left hand portion supported on the wall I0. The impeller has a plurality of blades rigidly secured together. A right hand end portion of the shaft i9 located in the inlet i2 is supported on a bearing member secured to the inlet l2 by a plurality of fluid directing vanes.

During operation, medium is forced into the inlet l2 and upon compression by the impeller all of the screws, resulting in movement of the 221 towards and away from the ring l3. This means comprises a plurality of uniformly spaced screws 23 having threaded portions 24 engaging threaded portions 25 of, the wall 22. In the present example the right hand end of each screw 23 is supported on a journal bearing 26' on a reinforced, flanged portion 21 of the scroll IS. A left hand portion of each screw 22 is supported on a balibearing 28 held on the ring l3.

The screws are coupled by a rack and pinion arrangement. In the present instance the left hand portion of each screw 23 is provided with a pinion 29 engaging an annular rack 33. The rack 30 is rotatably supported by a plurality of circumferentially, uniformly spaced ballbearings 3 I, each of these bearings being held on a bracket 32 secured to an inner, flanged portion of the ring i3. One of the screws 23 is provided with an extension to which a handwheel 33 is secured by a bolt 34.

During operation, rotation of the handwheel 33 effects rotation of the screws 23 to which the wheel is fastened and simultaneously effects rotation of the rack 30 and the pinions 29 on, the other screws 23. This causes equal rotation of adjustable diffuser ring 22 towards or away from the ring l3, depending upon the direction of roing. In the present example the ring 22 is provided with an inner, cylindrical extension 35 having grooves 36 forming teeth 31 in close.

proximity to the flanged portion 21 of the scroll l5, thus constituting a labyrinth packing to reduceleakage of fluid along the outer surface of the ring 22 facing away from the ring I 3.

Having described the method of operation of my invention, together with the apparatus which I now consider to represent the best embodiment it is forced outward into the discharge scroll thereof, I desire to have it understood that the ing an impeller chamber and a scroll, an impeller located in the impeller chamber and having blades rigidly secured together, a ring diffuser for a conducting fluid from the impeller chamber to the scroll comprising a wall of the casing and a ring disposed within the casing and spaced from said wall, means forming a labyrinth packing.

1 between the ring and the casing, and means includinz a pluralityof circumterentially uniform- -15 v ly spaced screws engaging the ring and rotatably supported on the casing, a pinion secured to each v screw, a rack rctatably supported on the casing and engaging the pinions and a handwheel secured to one of the screws for adjusting the spacing between the wall and the ring said ring having an inner portion conically shaped and forming together with'a corresponding portion of the wall a space with an axial width decreasing in radial direction to assure a smooth flow of'fluid from the impeller into the difluserin the various positions of said rin ROBERT E. mn'rson.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2715814 *Mar 13, 1950Aug 23, 1955Centrax Power Units LtdFuel-flow for plural radial inwardflow gas turbines
US2739782 *Oct 7, 1952Mar 27, 1956Fairchild Engine & AirplaneVariable area turbine nozzle
US2803396 *Sep 29, 1954Aug 20, 1957Gen ElectricCompressor
US2814431 *Sep 29, 1954Nov 26, 1957Gen ElectricCompressor
US2845798 *Sep 13, 1956Aug 5, 1958Knauth Berthold AVortex flow throttling device
US3032259 *Nov 26, 1958May 1, 1962Sulzer AgTurbocompressor having a radial diffuser
US3071345 *Apr 27, 1961Jan 1, 1963United Aircraft CorpThrottle valve
US3073512 *Nov 28, 1960Jan 15, 1963Thompson Ramo Wooldridge IncTurbocharger fence ring
US3120374 *Aug 3, 1962Feb 4, 1964Gen ElectricExhaust scroll for turbomachine
US3160392 *Jan 5, 1962Dec 8, 1964Hunter David UTurbine with variable nozzle
US3191851 *Dec 31, 1963Jun 29, 1965Westinghouse Electric CorpCentrifugal fans
US3236500 *Nov 20, 1962Feb 22, 1966Geratebau Eberspacher OhgTurbine
US3478955 *Mar 11, 1968Nov 18, 1969Dresser IndVariable area diffuser for compressor
US4292807 *May 2, 1979Oct 6, 1981United Technologies CorporationVariable geometry turbosupercharger system for internal combustion engine
US4411592 *Feb 23, 1979Oct 25, 1983Carrier CorporationPressure variation absorber
US4504188 *Aug 1, 1983Mar 12, 1985Carrier CorporationPressure variation absorber
US4824323 *Mar 4, 1988Apr 25, 1989Borsig GmbhRadial turbo-machine with disc diffusor
US6139262 *May 8, 1998Oct 31, 2000York International CorporationVariable geometry diffuser
US6192668Oct 19, 1999Feb 27, 2001Capstone Turbine CorporationMethod and apparatus for compressing gaseous fuel in a turbine engine
US6887034 *May 15, 2001May 3, 2005The Gorman-Rupp CompanyCentrifugal pump having adjustable clean-out assembly
US6960840Nov 13, 2003Nov 1, 2005Capstone Turbine CorporationIntegrated turbine power generation system with catalytic reactor
US7856834Feb 20, 2008Dec 28, 2010Trane International Inc.Centrifugal compressor assembly and method
US7975506Feb 20, 2008Jul 12, 2011Trane International, Inc.Coaxial economizer assembly and method
US8037713Feb 20, 2008Oct 18, 2011Trane International, Inc.Centrifugal compressor assembly and method
US8322056Jun 4, 2012Dec 4, 2012Terra Green Energy, LlcSystem and method for preparation of solid biomass by torrefaction
US8627680Oct 4, 2011Jan 14, 2014Trane International, Inc.Centrifugal compressor assembly and method
US8790077Jun 12, 2009Jul 29, 2014Weir Minerals Australia Ltd.Adjustable side liner for a pump
EP2315948A1 *Jun 12, 2009May 4, 2011Weir Minerals Australia LtdAn adjustable side liner for a pump
EP2626573A1 *Sep 20, 2012Aug 14, 2013Lg Electronics Inc.Centrifugal compressor
WO1999058858A1 *Mar 23, 1999Nov 18, 1999York Int CorpVariable geometry diffuser
WO2001090583A1 *May 15, 2001Nov 29, 2001Eddie D CottrellCentrigugal pump having adjustable clean-out assembly
WO2007021870A2 *Aug 9, 2006Feb 22, 2007Kim M ArnoldTool-free adjustable clean-out assembly for a pump
WO2013025291A1 *Jul 2, 2012Feb 21, 2013Itt Manufacturing Enterprises, LlcMethod and apparatus for adjusting impeller-sealing ring clearance in a pump
Classifications
U.S. Classification415/128, 415/224.5, 415/158
International ClassificationF04D29/46
Cooperative ClassificationF04D29/464
European ClassificationF04D29/46C2