US20080170958A1 - Rotor assembly and method of forming - Google Patents

Rotor assembly and method of forming Download PDF

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Publication number
US20080170958A1
US20080170958A1 US11/622,007 US62200707A US2008170958A1 US 20080170958 A1 US20080170958 A1 US 20080170958A1 US 62200707 A US62200707 A US 62200707A US 2008170958 A1 US2008170958 A1 US 2008170958A1
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US
United States
Prior art keywords
rotor
rotor section
section
assembly
lobes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/622,007
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English (en)
Inventor
Gregory P. Prior
Roxann M. Bittner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GM Global Technology Operations LLC
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GM Global Technology Operations LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GM Global Technology Operations LLC filed Critical GM Global Technology Operations LLC
Priority to US11/622,007 priority Critical patent/US20080170958A1/en
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS, INC. reassignment GM GLOBAL TECHNOLOGY OPERATIONS, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BITTNER, ROXANN M., PRIOR, GREGORY P.
Priority to DE102008003491A priority patent/DE102008003491A1/de
Priority to CNA2008100029714A priority patent/CN101265816A/zh
Publication of US20080170958A1 publication Critical patent/US20080170958A1/en
Assigned to UNITED STATES DEPARTMENT OF THE TREASURY reassignment UNITED STATES DEPARTMENT OF THE TREASURY SECURITY AGREEMENT Assignors: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
Assigned to CITICORP USA, INC. AS AGENT FOR HEDGE PRIORITY SECURED PARTIES, CITICORP USA, INC. AS AGENT FOR BANK PRIORITY SECURED PARTIES reassignment CITICORP USA, INC. AS AGENT FOR HEDGE PRIORITY SECURED PARTIES SECURITY AGREEMENT Assignors: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS, INC. reassignment GM GLOBAL TECHNOLOGY OPERATIONS, INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: UNITED STATES DEPARTMENT OF THE TREASURY
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS, INC. reassignment GM GLOBAL TECHNOLOGY OPERATIONS, INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: CITICORP USA, INC. AS AGENT FOR BANK PRIORITY SECURED PARTIES, CITICORP USA, INC. AS AGENT FOR HEDGE PRIORITY SECURED PARTIES
Assigned to UNITED STATES DEPARTMENT OF THE TREASURY reassignment UNITED STATES DEPARTMENT OF THE TREASURY SECURITY AGREEMENT Assignors: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
Assigned to UAW RETIREE MEDICAL BENEFITS TRUST reassignment UAW RETIREE MEDICAL BENEFITS TRUST SECURITY AGREEMENT Assignors: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-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
    • F04C18/082—Details specially related to intermeshing engagement type pumps
    • F04C18/084—Toothed wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-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
    • F04C18/12—Rotary-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 of other than internal-axis type
    • F04C18/126—Rotary-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 of other than internal-axis type with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-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
    • F04C18/12—Rotary-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 of other than internal-axis type
    • F04C18/14—Rotary-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 of other than internal-axis type with toothed rotary pistons
    • F04C18/16—Rotary-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 of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/20—Manufacture essentially without removing material
    • F04C2230/22—Manufacture essentially without removing material by sintering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/20—Manufacture essentially without removing material
    • F04C2230/23—Manufacture essentially without removing material by permanently joining parts together
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/20—Manufacture essentially without removing material
    • F04C2230/23—Manufacture essentially without removing material by permanently joining parts together
    • F04C2230/231—Manufacture essentially without removing material by permanently joining parts together by welding
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49316—Impeller making
    • Y10T29/4932—Turbomachine making

Definitions

  • the present invention relates to rotor assemblies and a method of forming rotor assemblies for a compressor or supercharger.
  • Roots-type or screw-type positive displacement compressors are employed in industrial and automotive applications.
  • the compressor or supercharger may be operatively connected to an internal combustion engine to increase the amount or volume of intake air communicated to the internal combustion engine and thus provide for increased performance.
  • the supercharger typically includes two interleaved counter-rotating rotors, each of which may be formed with a plurality of helical shaped lobes to convey volumes of intake air from an inlet passage to an outlet passage for subsequent introduction to the internal combustion engine.
  • Engine designers may include a selectively engageable clutch, such as an electrically operated clutch, disposed between an input pulley and the supercharger to selectively disengage the supercharger, i.e. stop or slow the rotation of the rotors contained therein, when its operation is not required, such as low engine load operation.
  • a selectively engageable clutch such as an electrically operated clutch
  • the durability and reliability of the clutch is largely a function of the inertia of the rotors which, in turn, is a function of the size and mass of the rotor lobes.
  • a rotor assembly for a supercharger having a first rotor section and at least one other rotor section affixed to the first rotor section.
  • the first rotor section and the at least one other rotor section are formed from powdered metal and are substantially similar in shape.
  • Each of the first rotor section and the at least one other rotor section has a plurality of lobes that are substantially hollow.
  • the first rotor section and the at least one other rotor section are affixed through one of brazing, copper infiltration, and welding.
  • Each of the first rotor section and the at least one other rotor section has at least one axially extending locating feature and at least one recess.
  • the at least one recess of the first rotor section cooperates with the at least one axially extending locating feature of the at least one other rotor section to locate the first rotor section with respect to the at least one other rotor section.
  • the rotor sections may be formed from one of steel, aluminum, and aluminum alloys.
  • a supercharger assembly incorporating the disclosed rotor assembly is also provided.
  • a method of forming the rotor assembly described hereinabove includes the steps of: A) forming a plurality of rotor sections from powdered metal; B) indexing adjacent rotor sections utilizing the locating features and recesses; and C) affixing the rotor sections with respect to each other to form the rotor assembly.
  • FIG. 1 is a schematic perspective view of a supercharger configured for use with an internal combustion engine
  • FIG. 2 is a perspective view of a rotor for use with the supercharger of FIG. 1 ;
  • FIG. 3 is a perspective view of a rotor section configured to form the rotor of FIG. 2 ;
  • FIG. 4 is another perspective view of the rotor section of FIG. 3 ;
  • FIG. 5 is a perspective view of an alternate embodiment of a rotor for use with the supercharger of FIG. 1 .
  • FIG. 1 a compressor or supercharger assembly, generally indicated at 10 .
  • the supercharger 10 includes a housing 12 .
  • the housing 12 defines an inlet passage 14 configured to induct intake air, represented by arrow 16 , into the supercharger assembly 10 .
  • the housing 12 further defines an outlet passage 18 configured to exhaust the intake air 16 from the supercharger assembly 10 .
  • a rotor cavity 20 is defined by the housing 12 and is configured to contain a first and second rotor assembly 22 and 24 , respectively, rotatably disposed therein.
  • the first and second rotor assemblies 22 and 24 are interleaved and counter-rotating with respect to each other.
  • the first rotor assembly 22 includes a plurality of lobes 26 extending radially outward in a clockwise twisting helical shape, as viewed from the inlet passage 14
  • the second rotor assembly 24 includes a plurality of lobes 28 extending radially outward in a counterclockwise twisting helical shape, as viewed from the inlet passage 14 .
  • the first and second rotor assemblies 22 and 24 cooperate to convey volumes of intake air 16 from the inlet passage 14 to the outlet passage 18 .
  • the first and second rotor assemblies 22 and 24 are rotatably supported within the rotor cavity 20 by a respective first and second shaft member 30 and 32 .
  • the construction of the first and second rotor assemblies 22 and 24 is discussed in greater detail hereinbelow with reference to FIGS. 2 through 5 . It should be understood that the construction of the second rotor assembly 24 is substantially similar to that of the first rotor assembly 22 . For simplicity, the discussion hereinbelow will focus on the construction of the first rotor assembly 22 , it being understood that the disclosed structure and method of forming are equally applicable to the second rotor assembly 24 .
  • FIG. 2 there is shown a perspective view of the first rotor assembly 22 having lobes 26 extending generally radially outward from a hub portion 34 in a helical shape.
  • Each of the lobes 26 define a cavity 36 , such that the lobes 26 may be generally referred to as hollow.
  • the cavities 36 of lobes 26 provide a reduction in rotational inertia over solid lobes, which may increase the reliability and durability of a selectively engageable clutch, not shown, configured to selectively deactivate the supercharger assembly 10 of FIG. 1 .
  • the first rotor assembly 22 is formed from a plurality of rotor sections 38 .
  • Each of the rotor sections 38 is preferably formed from sintered or powdered metal such as steel, aluminum and its alloys, etc. Each of the rotor sections 38 are preferably the same shape such that they may be formed from the same tooling. Additionally, by forming each of the rotor sections 38 with helical lobes 26 , the resulting first rotor assembly 22 will have a near net shape once the rotor sections 38 are assembled thereby reducing the number of machining operations required to finish the first rotor assembly 22 .
  • the rotor sections 38 are affixed or attached to each other and mounted on the first shaft member 32 which extends through a bore 40 , shown in FIGS. 3 and 4 , defined by the hub portion 34 of the first rotor assembly 22 .
  • the rotor section includes a first face 42 and a second face 44 , shown in FIG. 4 .
  • the first face 42 includes locating features 46 extending generally axially therefrom.
  • the locating features 46 are shown as being generally semi-spherical in shape; however, those skilled in the art will recognize other shapes may be provided, such as cylinders, pyramids, cubes, etc. while remaining within the scope of that which is claimed. As shown in FIG.
  • the second face 44 of the rotor section 38 defines recesses 48 sufficiently configured to receive locating features 46 of an adjacent rotor section, thereby indexing or providing a measure of alignment between adjacent rotor sections 38 of the first rotor assembly 22 of FIG. 2 .
  • the method includes the steps of: A) forming the plurality of rotor sections 38 from powdered metal; B) indexing adjacent rotor sections 38 utilizing the locating features 46 and recesses 48 ; and C) affixing the rotor sections 38 with respect to each other to form the first rotor assembly 22 .
  • the rotor sections 38 may be formed from steel or aluminum and its alloys.
  • adjacent rotor sections 38 may be affixed to one another through welding, brazing, or copper infiltration techniques.
  • a measure of resistance against scuffing during operation of the super charger 10 may be provided.
  • adjacent rotor sections 38 may be affixed to one another through welding or brazing.
  • the rotor assembly 22 A includes a plurality of rotor sections 38 A formed from sintered or powdered metal, such as steel or aluminum and its alloys.
  • the rotor sections 38 A have a plurality of lobes 26 A extending generally radially outward from a hub portion 34 A.
  • the rotor sections 38 A are similar to the rotor sections 38 of FIGS. 2 through 4 , except that the rotor sections 38 A are generally straight in the axial direction as opposed to the generally helical shape of rotor sections 38 .
  • the rotor sections 38 A must be affixed to each other in a slightly offset fashion to form the helical shape of the lobes 26 A of the rotor assembly 22 A thereby requiring a greater number of machining operations to finish the rotor assembly 22 A when compared to that of the first rotor assembly 22 .
  • the bracketed portion, indicated at 50 illustrates the rotor assembly 22 A prior to finish machining, while the bracketed portion, indicated at 52 , illustrates the rotor assembly 22 A after finish machining.
  • the method of forming the rotor assembly 22 A is substantially similar the method of forming the first rotor assembly 22 described hereinabove.
  • the rotor assemblies 22 and 22 A By forming the rotor assemblies 22 and 22 A from powdered metal rotor sections 38 and 38 A, respectively, flexibility in rotor length may be provided with no or minor changes in tooling. Additionally, by forming the rotor assemblies 22 and 22 A from rotor sections 38 and 38 A, the respective lobes 26 and 26 A may be formed substantially hollow at reduced tooling complexity over traditional rotor forming techniques such as die-casting and investment casting. Furthermore, the amount of scrap rate may be substantially reduced over traditional rotor forming techniques. Those skilled in the art will recognize that the rotor assemblies 22 and 22 A may be formed from a single rotor section 38 and 38 A, formed form powdered metal, while remaining within the scope of that which is claimed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supercharger (AREA)
US11/622,007 2007-01-11 2007-01-11 Rotor assembly and method of forming Abandoned US20080170958A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US11/622,007 US20080170958A1 (en) 2007-01-11 2007-01-11 Rotor assembly and method of forming
DE102008003491A DE102008003491A1 (de) 2007-01-11 2008-01-08 Rotoranordnung und Verfahren zu deren Bildung
CNA2008100029714A CN101265816A (zh) 2007-01-11 2008-01-11 转子组件及其形成方法

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Application Number Priority Date Filing Date Title
US11/622,007 US20080170958A1 (en) 2007-01-11 2007-01-11 Rotor assembly and method of forming

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US (1) US20080170958A1 (zh)
CN (1) CN101265816A (zh)
DE (1) DE102008003491A1 (zh)

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US20080292487A1 (en) * 2007-05-21 2008-11-27 Gm Global Technology Operations, Inc. Tapered Rotor Assemblies for a Supercharger
US20090004038A1 (en) * 2007-06-26 2009-01-01 Gm Global Technology Operations, Inc. Liquid-Cooled Rotor Assembly for a Supercharger
US7708113B1 (en) * 2009-04-27 2010-05-04 Gm Global Technology Operations, Inc. Variable frequency sound attenuator for rotating devices
US20100269797A1 (en) * 2009-04-24 2010-10-28 Gm Global Technology Operations, Inc. Tuning device with combined backflow function
US20100269798A1 (en) * 2009-04-24 2010-10-28 Gm Global Technology Operations, Inc. Integral rotor noise attenuators
WO2014151057A3 (en) * 2013-03-15 2014-12-24 Eaton Corporation Low inertia laminated rotor
US20150252719A1 (en) * 2012-11-20 2015-09-10 Eaton Corporation Composite supercharger rotors and methods of construction thereof
WO2015138557A1 (en) * 2014-03-12 2015-09-17 Eaton Corporation Methods for making a low inertia laminated rotor
CN105065263A (zh) * 2015-08-02 2015-11-18 衢州市易凡设计有限公司 一种叠层浸胶螺杆轴
WO2015184371A1 (en) * 2014-05-30 2015-12-03 Eaton Corporation Composite rotary component
WO2016133854A1 (en) * 2015-02-16 2016-08-25 Eaton Corporation Engine intake and exhaust flow management
USD786933S1 (en) * 2014-11-24 2017-05-16 Eaton Corporation Supercharger housing
US9683521B2 (en) 2013-10-31 2017-06-20 Eaton Corporation Thermal abatement systems
WO2017129794A1 (de) * 2016-01-28 2017-08-03 Hugo Vogelsang Maschinenbau Gmbh Kolben für eine drehkolbenpumpe
US20170260981A1 (en) * 2016-03-09 2017-09-14 Eaton Corporation Segmented rotor form for superchargers and expanders
WO2017223060A1 (en) * 2016-06-20 2017-12-28 Eaton Corporation Hollow rotor lobe and control of tip deflection
USD816717S1 (en) * 2014-08-18 2018-05-01 Eaton Corporation Supercharger housing
US11280335B2 (en) 2016-10-31 2022-03-22 Vogelsang Gmbh & Co. Kg Rotary piston pump having a sealing chamber seal
US20220234106A1 (en) * 2016-02-25 2022-07-28 Eaton Intelligent Power Limited Additively manufactured rotors for superchargers and expanders

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US20140110620A1 (en) * 2012-10-19 2014-04-24 GM Global Technology Operations LLC Split and brazed powdered metal valve body
CN105014324A (zh) * 2015-08-02 2015-11-04 衢州市易凡设计有限公司 一种叠层螺杆轴的加工方法
CN105065261A (zh) * 2015-08-02 2015-11-18 衢州市易凡设计有限公司 一种叠层浸胶螺杆轴的加工方法
CN105065265A (zh) * 2015-08-02 2015-11-18 衢州市易凡设计有限公司 一种多层浸胶螺杆的压缩机
CN105065267A (zh) * 2015-08-02 2015-11-18 衢州市易凡设计有限公司 一种叠层浸胶螺杆的压缩机
WO2020044715A1 (ja) * 2018-08-29 2020-03-05 株式会社日立産機システム スクリューロータ及びスクリュー流体機械本体
CN109441811A (zh) * 2018-12-26 2019-03-08 东莞赫升机电有限公司 堆叠转子式螺杆压缩机
CN111502984A (zh) * 2020-04-26 2020-08-07 陕西理工大学 一种空心内支撑螺杆转子及其加工方法
CN111396311A (zh) * 2020-04-26 2020-07-10 陕西理工大学 一种空心螺杆转子及其加工方法

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US2714314A (en) * 1951-05-15 1955-08-02 Howden James & Co Ltd Rotors for rotary gas compressors and motors
US2857779A (en) * 1953-05-16 1958-10-28 Saurer Ag Adolph Cast rotor with hollow helical teeth for rotary compressors
US3918838A (en) * 1974-01-04 1975-11-11 Dunham Bush Inc Metal reinforced plastic helical screw compressor rotor
US4899799A (en) * 1988-06-09 1990-02-13 Drazy Norman A Helical compressor and method of making same
US5180299A (en) * 1992-04-27 1993-01-19 Feuling Engineering, Inc. Roots type supercharger
US5290150A (en) * 1991-10-17 1994-03-01 Ebara Corporation Screw rotor comprising a plurality of thin plates
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
US5320508A (en) * 1993-08-05 1994-06-14 Eaton Corporation Rotary pump and rotor-shaft subassembly for use therein
US5638600A (en) * 1994-10-07 1997-06-17 Ford Motor Company Method of making an efficiency enhanced fluid pump or compressor
US5743321A (en) * 1994-07-27 1998-04-28 Bitzer Kuehlmaschinenbau Gmbh & Co. Kg Process for the production of parts with a spirally symmetrical outer contour
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
US5970611A (en) * 1996-10-31 1999-10-26 Ishikawajima-Harima Heavy Industries Co., Ltd. Method for processing a rotor used for a super charger
US6681835B2 (en) * 2001-04-27 2004-01-27 Ishikawajima-Harima Heavy Industries Co., Ltd. Method and apparatus for manufacturing supercharger rotor
US6688867B2 (en) * 2001-10-04 2004-02-10 Eaton Corporation Rotary blower with an abradable coating
US6884050B2 (en) * 2003-04-16 2005-04-26 General Motors Corporation Roots supercharger with extended length helical rotors
US6918749B2 (en) * 2000-08-02 2005-07-19 Werner Rietschle Gmbh & Co. Kg Compressor with aluminum housing and at least one aluminum rotor
US20060263230A1 (en) * 2005-05-23 2006-11-23 Matthew G. Swartzlander Optimized helix angle rotors for Roots-style supercharger

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Publication number Priority date Publication date Assignee Title
US2714314A (en) * 1951-05-15 1955-08-02 Howden James & Co Ltd Rotors for rotary gas compressors and motors
US2857779A (en) * 1953-05-16 1958-10-28 Saurer Ag Adolph Cast rotor with hollow helical teeth for rotary compressors
US3918838A (en) * 1974-01-04 1975-11-11 Dunham Bush Inc Metal reinforced plastic helical screw compressor rotor
US4899799A (en) * 1988-06-09 1990-02-13 Drazy Norman A Helical compressor and method of making same
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
US5290150A (en) * 1991-10-17 1994-03-01 Ebara Corporation Screw rotor comprising a plurality of thin plates
US5180299A (en) * 1992-04-27 1993-01-19 Feuling Engineering, Inc. Roots type supercharger
US5320508A (en) * 1993-08-05 1994-06-14 Eaton Corporation Rotary pump and rotor-shaft subassembly for use therein
US5743321A (en) * 1994-07-27 1998-04-28 Bitzer Kuehlmaschinenbau Gmbh & Co. Kg Process for the production of parts with a spirally symmetrical outer contour
US5638600A (en) * 1994-10-07 1997-06-17 Ford Motor Company Method of making an efficiency enhanced fluid pump or compressor
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
US5970611A (en) * 1996-10-31 1999-10-26 Ishikawajima-Harima Heavy Industries Co., Ltd. Method for processing a rotor used for a super charger
US6918749B2 (en) * 2000-08-02 2005-07-19 Werner Rietschle Gmbh & Co. Kg Compressor with aluminum housing and at least one aluminum rotor
US6681835B2 (en) * 2001-04-27 2004-01-27 Ishikawajima-Harima Heavy Industries Co., Ltd. Method and apparatus for manufacturing supercharger rotor
US6938670B2 (en) * 2001-04-27 2005-09-06 Ishikawajima-Harima Heavy Industries Co., Ltd. Method and apparatus for manufacturing supercharger rotor
US6688867B2 (en) * 2001-10-04 2004-02-10 Eaton Corporation Rotary blower with an abradable coating
US6884050B2 (en) * 2003-04-16 2005-04-26 General Motors Corporation Roots supercharger with extended length helical rotors
US20060263230A1 (en) * 2005-05-23 2006-11-23 Matthew G. Swartzlander Optimized helix angle rotors for Roots-style supercharger

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