US3923432A - Rotor housing of a rotary engine - Google Patents

Rotor housing of a rotary engine Download PDF

Info

Publication number
US3923432A
US3923432A US453936A US45393674A US3923432A US 3923432 A US3923432 A US 3923432A US 453936 A US453936 A US 453936A US 45393674 A US45393674 A US 45393674A US 3923432 A US3923432 A US 3923432A
Authority
US
United States
Prior art keywords
rotor housing
housing
rotor
sleeve
bore
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.)
Expired - Lifetime
Application number
US453936A
Other languages
English (en)
Inventor
Takeshi Nakakobara
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.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
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 Toyota Motor Corp filed Critical Toyota Motor Corp
Application granted granted Critical
Publication of US3923432A publication Critical patent/US3923432A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B55/00—Internal-combustion aspects of rotary pistons; Outer members for co-operation with rotary pistons
    • F02B55/08—Outer members for co-operation with rotary pistons; Casings
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to a rotor housing of a rotary engine, and more particularly, an improvement of the clamping structure for the rotor housing which is clamped together with a side housing and/or an intermediate housing to define a rotor chamber therein.
  • the rotor housing of rotary engines is generally made of an aluminium alloy, and its inside wall surface over which the tip portions of the rotor slide is provided with chromium plating or nickel-silicon carbide composite plating so that the antiwearing characteristic of the surface is improved.
  • the side housing or the intermediate housing is usually made of cast iron.
  • the rotor housing is generally formed with bolt receiving bores extending along its wall surface in the direction of the rotor axis, whereby clamping bolts are passed through said bores from one side housing positioned on one side of the rotor housing to the other side housing positioned at the opposite side of the rotor housing to clamp the rotor and side housings together.
  • problems such as wear or exfoliation are caused due to a very small displacement between the side housing and the rotor housing.
  • the rotorhousing is made of an aluminium alloy because if the clamping elements are clamped together with a sufficiently high clamping torque to prevent the small displacement between the clamped portions, the rotor housing, made of an aluminium alloy, is caused to deform and loose its dimentional definitness. Thus a relatively low limit on the allowable clamping torque for the clamp bolts is necessary.
  • the rotor housing made of an aluminium alloy has a relatively different coefficient of thermal expansion as compared with the side housing and the clamp bolts, such as for example, about twice as high.
  • a rotor housing of a rotary engine said rotor housing being formed with bolt receiving bores extending along its wall surface in the direction of the rotor axis and closed at its opposite ends by a side housing and/or intermediate housing clamped thereto by means of bolts passed through said bores, thereby defining a rotor chamber therein, wherein a peripheral region of said bore is reinforced by a material which has a higher elasticity and creep limit than the material forming the body of the rotor housing.
  • the compression stress acting in the rotor housing itself can be maintained at a relatively low level while also maintaining a relatively high clamping force at the contacting surfaces of the clamping portions when the clamp bolts have been clamped.
  • the body of the rotor housing made of a relatively low compression resistant aluminium alloy is relieved from being subjected to a high compression stress.
  • the reinforcing material Since the reinforcing material has a higher elasticity than the material forming the body of the rotor housing, the reinforcing material reaches a higher stress condition than the material forming the body of the rotor housing even when the clamp bolts have been uniformly clamped, whereby a clamping stress necessary to keep the clamped portions in a highly stable condition is maintained.
  • the reinforcing material operates at a higher stress condition, it is of course necessary that the reinforcing material has a higher creep limit than the material forming the body of the rotor housing.
  • the reinforcing peripheral region of the bore may be made of a sleeve mounted in a. corresponding bore formed in the body ofthe rotor housing so that the sleeve provides a bore therein for the passage of the clamp bolt.
  • opposite end faces of the sleeve should preferably be flush with end faces of the rotor housing, whereby a good and uniform contact is attained between the clamping surfaces while allowing the reinforcing sleeve to bear a larger part of the clamping stress thereby relieving the body of the rotor housing from being subject to a high stress.
  • the material to reinforce the peripheral region of the bore may be steel or cast iron when the body of the rotor housing is made of an aluminium alloy.
  • FIG. 1 is a longitudinal section of a housing structure wherein a. rotor housing incorporating the clamping structure accordingto the present invention is assembledwith side housings;
  • FIG. 2 is a section along line IIII in FIG. 1;
  • FIGS. 3 and 4 are diagrams showing the contact stress conditions in Part A in FIG. 1 in the conventional structure and the structure according to the present invention for the purpose of comparison.
  • reference numeral 1 designates a rotor housing which is closed at opposite ends thereof by side housings 2 thereby to define a rotor chamber 3 therein.
  • the rotor housing and the side housings are clamped together by means of a plurality of clamp bolts 4, each of which is passed through a through bore 5 formed in the rotor housing and corresponding through bore 6 formed in the side housings.
  • the through bore 5 formed in the rotor housing is defined by a reinforcing sleeve 7 which forms the peripheral edge portion of the bore.
  • 8 designates O-rings made of rubber or the like to maintained gas tightness at the clamping portions between the rotor housing and the side housings.
  • the housing structure of a rotary engine shown in FIGS. 1 and 2 is an axial flow cooling system, and is formed with a plurality of cooling water passages 9 extending in the axial direction in the wall of the rotor housing.
  • the reinforcing sleeve 7 is preferably made of steel or cast iron.
  • FIGS. 3 and 4 are diagrams showing the contact stress conditions in part A for the conventional structure and the structure according to the present invention for the purpose of comparison, the latter structure incorporating the reinforcing sleeve 7.
  • a relatively high contact stress due to clamping is caused in the entire section of the rotor housing, while in the structure according to the present invention, the high contact stress due to clamping is substantially borne by the sleeve and the body portion of the rotor housing, made of an aluminium alloy, is subject only to a relatively low contact stress.
  • the rotor housing and the side housings can be firmly clamped so as not to cause wear, exfoliation of the plating, leakage, etc., due to the slight displacement between the rotor housing and the side housing without applying a high clamping contact stress to the rotor housing made of an aluminium alloy having a relatively low elasticity and creep limit.
  • a rotor housing of a rotary engine said rotor housing being formed with bolt receiving bores extending along its wall surface in the direction of the rotor axis and adapted to be closed at its opposite ends by a side housing and/or intermediate housing clamped thereto by means of bolts passing through said bores, thereby defining a rotor chamber therein wherein a sleeve is disposed in the bore to reinforce the peripheral region of said bore against compression applied in the axially direction of said bore, said sleeve being flush with the end faces of the rotor housing and being made of a material having a higher elasticity and creep limit'than that of said rotor housing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
US453936A 1973-10-29 1974-03-22 Rotor housing of a rotary engine Expired - Lifetime US3923432A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48121437A JPS5070706A (enrdf_load_stackoverflow) 1973-10-29 1973-10-29

Publications (1)

Publication Number Publication Date
US3923432A true US3923432A (en) 1975-12-02

Family

ID=14811104

Family Applications (1)

Application Number Title Priority Date Filing Date
US453936A Expired - Lifetime US3923432A (en) 1973-10-29 1974-03-22 Rotor housing of a rotary engine

Country Status (2)

Country Link
US (1) US3923432A (enrdf_load_stackoverflow)
JP (1) JPS5070706A (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2367930A1 (fr) * 1976-10-12 1978-05-12 Sperry Rand Corp Flasque anti-friction pour pompe ou moteur hydraulique a palettes
US4128366A (en) * 1976-12-24 1978-12-05 Toyota Jidosha Kogyo Kabushiki Kaisha Rotor housing for a rotary engine
FR2562635A1 (fr) * 1984-04-10 1985-10-11 Rexroth Sigma Perfectionnements apportes au bridage des carters de machine constitues d'au moins deux parties dont l'une est un metal de relativement faible durete
US5876192A (en) * 1996-11-08 1999-03-02 Ford Global Technologies, Inc. Differential expansion control assembly for a pump
WO2005005834A1 (de) * 2003-07-14 2005-01-20 Gkn Sinter Metals Holding Gmbh Zahnradpumpe mit optimiertem axialspiel
US20250020076A1 (en) * 2023-07-13 2025-01-16 Pratt & Whitney Canada Corp. Housing assembly for rotary engine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3269372A (en) * 1964-06-03 1966-08-30 Curtiss Wright Corp Through dowel construction for rotary mechanisms
US3652190A (en) * 1969-07-15 1972-03-28 Fichtel & Sachs Ag Rotor for a rotary internal combustion engine
US3715178A (en) * 1971-11-30 1973-02-06 Curtiss Wright Corp Doweling construction for rotary engine housing
US3791781A (en) * 1971-06-29 1974-02-12 Toyo Kogyo Co Rotary piston internal combustion engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3269372A (en) * 1964-06-03 1966-08-30 Curtiss Wright Corp Through dowel construction for rotary mechanisms
US3652190A (en) * 1969-07-15 1972-03-28 Fichtel & Sachs Ag Rotor for a rotary internal combustion engine
US3791781A (en) * 1971-06-29 1974-02-12 Toyo Kogyo Co Rotary piston internal combustion engine
US3715178A (en) * 1971-11-30 1973-02-06 Curtiss Wright Corp Doweling construction for rotary engine housing

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2367930A1 (fr) * 1976-10-12 1978-05-12 Sperry Rand Corp Flasque anti-friction pour pompe ou moteur hydraulique a palettes
US4128366A (en) * 1976-12-24 1978-12-05 Toyota Jidosha Kogyo Kabushiki Kaisha Rotor housing for a rotary engine
FR2562635A1 (fr) * 1984-04-10 1985-10-11 Rexroth Sigma Perfectionnements apportes au bridage des carters de machine constitues d'au moins deux parties dont l'une est un metal de relativement faible durete
EP0161171A1 (fr) * 1984-04-10 1985-11-13 Rexroth-Sigma Bridage des carters de machine constitués d'au moins deux parties dont l'une est en un métal de relativement faible dureté
US5876192A (en) * 1996-11-08 1999-03-02 Ford Global Technologies, Inc. Differential expansion control assembly for a pump
WO2005005834A1 (de) * 2003-07-14 2005-01-20 Gkn Sinter Metals Holding Gmbh Zahnradpumpe mit optimiertem axialspiel
US20060140811A1 (en) * 2003-07-14 2006-06-29 Josef Bachmann Gear pump having optimal axial play
US7713041B2 (en) 2003-07-14 2010-05-11 Gkn Sinter Metals Holding Gmbh Gear pump having optimal axial play
US20100239449A1 (en) * 2003-07-14 2010-09-23 Gkn Sinter Metals Holding Gmbh Gear Pump Having Optimal Axial Play
US7887309B2 (en) 2003-07-14 2011-02-15 Gkn Sinter Metals Holding Gmbh Gear pump having optimal axial play
US20250020076A1 (en) * 2023-07-13 2025-01-16 Pratt & Whitney Canada Corp. Housing assembly for rotary engine
US12203410B1 (en) * 2023-07-13 2025-01-21 Pratt & Whitney Canada Corp. Housing assembly for rotary engine

Also Published As

Publication number Publication date
JPS5070706A (enrdf_load_stackoverflow) 1975-06-12

Similar Documents

Publication Publication Date Title
US3473813A (en) Cylinder head gasket
US3923432A (en) Rotor housing of a rotary engine
CH622314A5 (enrdf_load_stackoverflow)
JP2018048632A (ja) ターボチャージャ
GB2100795A (en) Rotary i.c. engines
US3926539A (en) Rotary piston internal combustion engine
US3791781A (en) Rotary piston internal combustion engine
GB2143614A (en) Expander spring for composite oil-ring
US4024802A (en) Hydraulic piston and rod assembly
US3285188A (en) Hydraulic gear motor or hydraulic gear pump
US2844422A (en) Piston ring
US4347945A (en) Pump closure fastening means
US3973883A (en) Rotary piston machines
US3500797A (en) Reinforced rotary piston
US3950116A (en) Engine housings
EP0044680B1 (en) Annular fluid seals
US4080121A (en) Joint sealing for engine housings
US4222720A (en) Corner seal means for rotary piston engines
US3512791A (en) Light metal piston with piston ring groove armoring means
JPH08200062A (ja) 深溝冷却シリンダライナ
FR2668542A1 (fr) Joint de culasse pour moteur a combustion interne.
US5451149A (en) Rotor cooling of rotary engines
JP2902316B2 (ja) ロータリエンジンのサイドハウジング
JPH06594Y2 (ja) ロ−タリピストンエンジンのサイドハウジング
JP3143835B2 (ja) ピストンリングの組合せ