US2714314A - Rotors for rotary gas compressors and motors - Google Patents

Rotors for rotary gas compressors and motors Download PDF

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Publication number
US2714314A
US2714314A US226385A US22638551A US2714314A US 2714314 A US2714314 A US 2714314A US 226385 A US226385 A US 226385A US 22638551 A US22638551 A US 22638551A US 2714314 A US2714314 A US 2714314A
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hub
lobes
rotor
rotors
pair
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US226385A
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Per Helge N Ulander
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Howden James and Co Ltd
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Howden James and Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/082Details specially related to intermeshing engagement type pumps
    • F04C18/084Toothed wheels
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/19Gearing
    • Y10T74/1987Rotary bodies

Description

2, 1955 P. H. N. ULANDER 2,714,314

ROTORS FOR ROTARY GAS COMPRESSORS AND MOTORS Filed May 15, 1951 2 Sheets-Sheet l FIG 2 FIG.

m INVENTOR Per Helge Nutonael Ulonder ATTORNEYS Aug. 2, 1955 P. H. N. ULANDER ROTORS FOR ROTARY GAS COMPRESSORS AND MOTORS 2 Sheets-Sheet 2 Filed May 15, 1951 INVENTOR Per Helge Ncnonuel Ulunder BY fizz M ATT'ORNEYS ROTORS FOR ROTARY GAS COMPRESSORS AND MOTORS Per Helge N. Ulander, London, England, assignor to James Howtlen & Company Limited, Glasgow, Scotland, a corporation of Great Britain and Northern Ireland Application May 15, 1951, Serial No. 226,385

10 Claims. (Cl. 74-434) This invention relates to lobed rotors for rotary gas compressors and motors.

It is customary to manufacture rotors from castings or from solid forgings, the resultant rotors being heavy and having high moments of inertia. In addition, the cost of production is high.

A lobed rotor according to the invention comprises a set of metal pressings constituting lobes welded to a tubular hub, and stub axles welded to the ends of the hub.

A practical embodiment of the invention is illustrated in the accompanying drawings in which Fig. 1 is a pictorial view of a male rotor having helical lobes, before the stub axles are attached, Fig. 2 is a pictorial view of the male rotor of Fig. 1 in course of construction, Fig. 3 is a pictorial view of a female rotor having helical lobes, before the stub axles are attached, Fig. 4 is a cross section of a male rotor, Fig. 5 is a longitudinal section of a male rotor having straight lobes, and Fig. 6 is a half cross section of a male rotor presenting cooling passages.

In the drawings, and referring first to Figs. 1, 2, 4 and 5, 1 denotes a tubular hub, 2 denotes metal pressings forming the lobes of a male rotor, said lobes being formed in several sections welded together longitudinally at 3, and transversely at 4, the lobes being welded to the hub 1 at 5.

6 (Fig. 3) denotes metal pressings forming the lobes of a female rotor, the lobes 6 being formed of several sections welded to one another longitudinally at 7, and transversely at 8. Adjacent lobes 6 are welded to one another along their edges at 9. 10 denotes stub axles welded to the hub 1.

11 (Fig. 6) denotes an internal set of metal pressings welded to the huh I at 12, and leaving a partly annular passage 13 between the two sets of pressings 2 and 11. 14 (Fig. 5) denotes end plugs welded into the ends of the lobes.

Rotors constructed as described are much lighter than rotors produced by forging or by casting, and, since the lobes are preformed, the amount of material to be machined off to present the finished profile is much reduced. An additional advantage is that cooling fluid may be passed through the hollow lobes or through the partly annular passages presented within the lobes.

What is claimed is:

1. In a lobed rotor for compressors and the like, the combination of a tubular metal hub, a plurality of hollow lobes extending helically in relation to the axis of said tubular hub and each consisting of a pair of sheet metal shells each of arcuate form in cross-section, a helical strip of weld metal joining to one another the shells of each pair, and other helical strips of weld metal joining the shells of each pair to said hub.

2. A lobed rotor as claimed in claim 1, in which each hollow lobe is semi-circular in cross-section and the concave face of each lobe faces toward the tubular metal hub.

Ice

3. A lobed rotor as claimed in claim 1, in which the convex faces of the shells of each pair forming a hollow lobe face toward each other and toward the tubular metal hub of the rotor.

4. A lobed rotor as claimed in claim 1, in which each sheet metal shell extends helically in relation to the axis of the tubular hub.

5. A lobed rotor as claimed in claim 1, in which each sheet metal shell extends the length of the tubular metal hub and comprises a plurality of successive sections extending helically in relation to the axis of the tubular hub, and a strip of weld metal joining adjacent sections of the shell together.

6. A rotor as claimed in claim 1, including an internal hollow lobe in each of said plurality of hollow lobes and spaced therefrom, each internal hollow lobe extending helically in relation to the axis of said tubular hub and comprising a pair of sheet metal shells each of arcuate form in cross-section, a helical strip of weld metal joining to one another the shells of each pair, and other helical strips of weld metal joining the shells of each pair of internal lobes to said hub, each internal lobe being spaced from the surrounding hollow lobe of the rotor and presenting a passageway between the rotor lobe and the internal lobe, said passageway being open for reception of cooling fluid.

7. A lobed rotor as claimed in claim 1, including end pieces respectively closing the ends of the hollow lobes.

8. In a lobed rotor for compressors and the like, the combination of a tubular metal hub, a plurality of hollow lobes of semi-circular cross-section extending helically in relation to the axis of said tubular hub and each consisting of a pair of metallic shells, a helical strip of weld metal joining to one another the shells of each pair, and other helical strips of weld metal joining the shells of each pair to said hub.

9. In a lobed rotor for compressors and the like, the combination of a tubular metal hub, a plurality of hollow lobes extending helically in relation to the axis of said tubular hub and each including a pair of similar sheet metal shells each of arcuate form in cross-section extending the length of the hub, an edge of one shell of each pair being located adjacent an edge of the other shell of that pair, a helical strip of weld metal joining to one another the said adjacent edges of the shells of each pair, and other helical strips of weld metal joining the shells to said hub.

10. In a compressor including a male rotor and a female rotor, each rotor comprising a tubular metal hub and a plurality of hollow lobes extending helically in relation to the axis of the tubular metal hub and each including a pair of sheet metal shells each of arcuate form in cross-section, a helical strip of weld metal joining to one another the shells of each pair, other helical strips of weld metal joining the shells of each pair to the hub with which they are associated, the lobes of the male rotor being semi-circular in cross-section and having their concave faces directed toward the tubular hub, the convex-shaped faces of the pair of shells forming each lobe of the female rotor being directed toward each other and toward the tubular hub of the female rotor.

References Cited in the file of this patent UNITED STATES PATENTS Re. 21,374 Moineau Feb. 27, 1940 103,733 Gilchrist May 31, 1870 736,039 Wainwright Aug. 11, 1903 2,325,617 Lysholm et al. Aug. 3, 1943 2,464,011 Wade Mar. 8, 1949 2,564,093 Bijl Aug. 14, 1951 2,572,334 Guibert Oct. 23, 1951

US226385A 1951-05-15 1951-05-15 Rotors for rotary gas compressors and motors Expired - Lifetime US2714314A (en)

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3066851A (en) * 1958-07-03 1962-12-04 Marshall John Wilmott Rotary compressors and like rotary machines
US4127368A (en) * 1971-02-19 1978-11-28 Langer Paul G Rotor for eccentric helical gear pump
US5310320A (en) * 1990-04-27 1994-05-10 Svenska Rotor Maskiner Ab Rotor for a rotary screw machine having internal member and external shell made of pressed metal powder
DE19613659A1 (en) * 1995-04-07 1996-11-07 Tochigi Fuji Sangyo Kk Rotor for a screw or screw compressor, cast core for such a rotor, and method for manufacturing the rotor
WO1997021925A1 (en) * 1995-12-11 1997-06-19 Ateliers Busch S.A. Double worm system
EP1026399A1 (en) 1999-02-08 2000-08-09 Ateliers Busch S.A. Twin feed screw
EP1932616A1 (en) * 2006-12-11 2008-06-18 Mecastamp International Method of manufacturing elongated rotating mechanical parts
US20080170958A1 (en) * 2007-01-11 2008-07-17 Gm Global Technology Operations, Inc. Rotor assembly and method of forming
US9683569B2 (en) 2015-08-27 2017-06-20 Ingersoll-Rand Company Compressor system having rotor with distributed coolant conduits and method
US20170260981A1 (en) * 2016-03-09 2017-09-14 Eaton Corporation Segmented rotor form for superchargers and expanders
US9932983B2 (en) 2013-03-15 2018-04-03 Eaton Intelligent Power Limited Low inertia laminated rotor
US10208656B2 (en) 2012-11-20 2019-02-19 Eaton Intelligent Power Limited Composite supercharger rotors and methods of construction thereof
US10495090B2 (en) 2015-08-27 2019-12-03 Ingersoll-Rand Company Rotor for a compressor system having internal coolant manifold
US10591039B2 (en) 2012-07-03 2020-03-17 Eaton Intelligent Power Limited Fiber reinforced plenum for limited-slip differential

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US103733A (en) * 1870-05-31 Improvement in blowers
US736039A (en) * 1903-02-10 1903-08-11 Harry Archible Wainwright Impeller for rotary blowers or pumps.
USRE21374E (en) * 1940-02-27 Gear mechanism
US2325617A (en) * 1938-01-13 1943-08-03 Jarvis C Marble Rotor
US2464011A (en) * 1946-11-29 1949-03-08 Fmc Corp Helical hollow rotor pump
US2564093A (en) * 1944-02-16 1951-08-14 Hartford Nat Bank & Trust Co Cylindrical object manufactured by the extrusion process
US2572334A (en) * 1948-08-12 1951-10-23 Francis W Guibert Gearing utilizing detachable gear teeth

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US103733A (en) * 1870-05-31 Improvement in blowers
USRE21374E (en) * 1940-02-27 Gear mechanism
US736039A (en) * 1903-02-10 1903-08-11 Harry Archible Wainwright Impeller for rotary blowers or pumps.
US2325617A (en) * 1938-01-13 1943-08-03 Jarvis C Marble Rotor
US2564093A (en) * 1944-02-16 1951-08-14 Hartford Nat Bank & Trust Co Cylindrical object manufactured by the extrusion process
US2464011A (en) * 1946-11-29 1949-03-08 Fmc Corp Helical hollow rotor pump
US2572334A (en) * 1948-08-12 1951-10-23 Francis W Guibert Gearing utilizing detachable gear teeth

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3066851A (en) * 1958-07-03 1962-12-04 Marshall John Wilmott Rotary compressors and like rotary machines
US4127368A (en) * 1971-02-19 1978-11-28 Langer Paul G Rotor for eccentric helical gear pump
US5310320A (en) * 1990-04-27 1994-05-10 Svenska Rotor Maskiner Ab Rotor for a rotary screw machine having internal member and external shell made of pressed metal powder
DE19613659C2 (en) * 1995-04-07 1999-09-02 Tochigi Fuji Sangyo Kk Rotor for a screw or screw compressor, cast core for such a rotor, and method for manufacturing the rotor
DE19613659A1 (en) * 1995-04-07 1996-11-07 Tochigi Fuji Sangyo Kk Rotor for a screw or screw compressor, cast core for such a rotor, and method for manufacturing the rotor
US5772418A (en) * 1995-04-07 1998-06-30 Tochigi Fuji Sangyo Kabushiki Kaisha Screw type compressor rotor, rotor casting core and method of manufacturing the rotor
WO1997021925A1 (en) * 1995-12-11 1997-06-19 Ateliers Busch S.A. Double worm system
US6139297A (en) * 1995-12-11 2000-10-31 Ateliers Busch S.A. Double worm system
AU719268B2 (en) * 1995-12-11 2000-05-04 Ateliers Busch S.A. Double worm system
CN1083536C (en) * 1995-12-11 2002-04-24 爱特里尔斯布时股份公司 Double worm system
EP1026399A1 (en) 1999-02-08 2000-08-09 Ateliers Busch S.A. Twin feed screw
EP1932616A1 (en) * 2006-12-11 2008-06-18 Mecastamp International Method of manufacturing elongated rotating mechanical parts
FR2935626A1 (en) * 2006-12-11 2010-03-12 Mecastamp Internat Process for manufacturing rotating mechanical spare parts
US20080170958A1 (en) * 2007-01-11 2008-07-17 Gm Global Technology Operations, Inc. Rotor assembly and method of forming
US10591039B2 (en) 2012-07-03 2020-03-17 Eaton Intelligent Power Limited Fiber reinforced plenum for limited-slip differential
US10208656B2 (en) 2012-11-20 2019-02-19 Eaton Intelligent Power Limited Composite supercharger rotors and methods of construction thereof
US9932983B2 (en) 2013-03-15 2018-04-03 Eaton Intelligent Power Limited Low inertia laminated rotor
US9683569B2 (en) 2015-08-27 2017-06-20 Ingersoll-Rand Company Compressor system having rotor with distributed coolant conduits and method
US10495090B2 (en) 2015-08-27 2019-12-03 Ingersoll-Rand Company Rotor for a compressor system having internal coolant manifold
US20170260981A1 (en) * 2016-03-09 2017-09-14 Eaton Corporation Segmented rotor form for superchargers and expanders

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