Internal-combustion engines – Rotary – With transfer means intermediate single compression volume...
Reexamination Certificate
2002-12-18
2004-01-27
Denion, Thomas (Department: 3748)
Internal-combustion engines
Rotary
With transfer means intermediate single compression volume...
C060S618000, C060S651000, C060S670000, C418S264000, C418S266000, C418S150000, C091S498000
Reexamination Certificate
active
06681738
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a rotary type fluid machine and a vane type fluid machine which can also be used as an expanding machine and/or a compressing machine, and a waste heat recovering device for an internal combustion engine for extracting mechanical energy utilizing waste heat of the internal combustion engine.
BACKGROUND ART
Japanese Patent Application Laid-open No. 6-88523 describes a waste heat recovering device for an internal combustion engine for generating high temperature and high pressure vapor with heat energy of exhaust gas of the internal combustion engine and supplying the high temperature and high pressure vapor to a turbine type expanding machine to generate mechanical energy.
Japanese Patent Application Laid-open No. 59-41602 describes a double multi-vane type rotary machine. This is such that a circular vane support ring is disposed between an oval outer cam ring and an oval inner cam ring, and that outer ends and inner ends of a plurality of vanes supported slidably in radial directions by the vane support ring are placed in abutment against an inner peripheral surface of the outer cam ring and an outer peripheral surface of the inner cam ring, respectively. Thus, when the vane support ring exerts a relative rotation with respect to the outer cam ring and inner cam ring, volume of a plurality of operation chambers comparted by the vanes between the outer cam ring and the vane support ring is expanded or compressed to function as an expanding machine or a compressing machine, and volume of a plurality of operation chambers comparted by the vanes between the inner cam ring and the vane support ring is expanded or compressed to function as an expanding machine or a compressing machine.
In this double multi-vane type rotary machine, outer and inner rotary machines can be used as respectively independent expanding machines, the outer and inner rotary machines can be used as respectively independent compressing machines, or one and the other of the outer and inner rotary machines can be respectively used as the expanding machine and compressing machine.
Japanese Patent Application Laid-open No. 60-206990 describes a vane type rotary machine which can be used as an expanding machine or a compressing machine. This is such that a circular intermediate cylinder is disposed in an offset manner between a circular outer cam ring and a circular inner cam ring, which are disposed concentrically, and that outer ends and inner ends of a plurality of vanes supported slidably in the radial directions by the intermediate cylinder are placed in abutment against an inner peripheral surface of the outer cam ring and an outer peripheral surface of the inner cam ring, respectively. Thus, when the intermediate cylinder exerts a relative rotation with respect to the outer cam ring and inner cam ring, volume of a plurality of operation chambers comparted by the vanes between the outer cam ring and the vane support ring is expanded or compressed to function as an expanding machine or a compressing machine, and volume of a plurality of operation chambers comparted by the vanes between the inner cam ring and the vane support ring is expanded or compressed to function as an expanding machine or a compressing machine.
In this vane type rotary machine, outer and inner rotary machines can be used as respectively independent expanding machines, the outer and inner rotary machines can be used as respectively independent compressing machines, or a working fluid having passed through one of the outer and inner rotary machines can be made to pass through the other to connect the outer and inner rotary machines in series for operation as a two-stage expanding machine or a two-stage compressing machine.
Japanese Patent Application Laid-open No. 57-16293 describes a vane type rotary compressor. This is such that a circular rotor is rotatably disposed in a non-circular cam ring, and that a roller provided at an intermediate portion of each vane is guided in engagement with a roller track provided in a casing in such a manner that tips of a plurality of vanes radially supported by the rotor move along an inner peripheral surface of the cam ring.
Japanese Patent Application Laid-open No. 64-29676 describes a radial plunger pump. This is such that a plurality of cylinders are radially formed in a rotor disposed in an offset manner in a circular cam ring, and that tips of plungers slidably fitted to the cylinders are placed in abutment against an inner peripheral surface of the cam ring to be reciprocated and thereby operated as a pump.
Japanese Patent Application Laid-open No. 58-48706 describes a Rankine cycle apparatus comprising a vane type expanding machine. This is such that high temperature and high pressure vapor energy generated by an evaporating machine using a gas burner as a heat source is converted to mechanical energy via a vane type expanding machine, and that resultant reduced temperature and reduced pressure vapor is condensed by a condensing machine and then returned again to the evaporating machine by a supply pump.
The applicant proposes a waste heat recovering device for an internal combustion engine having an evaporating machine for generating high temperature and high pressure vapor using waste heat as a heat source, an expanding machine for generating an output by expansion of the high temperature and high pressure vapor, and a condensing machine for liquefying reduced temperature and reduced pressure vapor exhausted from the expanding machine, in order to recover waste heat of the internal combustion engine, in Japanese Patent Application Nos. 11-57933 and 11-57934.
The expanding machine proposed in the Japanese Patent Application No. 11-57933 or Japanese Patent Application No. 11-57934 is such that a piston is slidably fitted to a cylinder radially formed in a rotor, and that high temperature and high pressure vapor is successively supplied from a fixed shaft disposed at the center of the rotor to each cylinder to drive the piston and thereby rotate the rotor. A rotary valve for supplying high temperature and high pressure vapor from the inside of the hollow fixed shaft to each cylinder with predetermined timing is such that a seal block made of carbon for guiding the high temperature and high pressure vapor is resiliently in sliding contact with an inner peripheral surface of the hollow shaft formed with a through-hole communicating with the cylinder, and that the spring force is generated by a spring and a bellows operated by the high temperature and high pressure vapor.
It should be noted here that the expanding machine disclosed in the Japanese Patent Application Laid-open No. 6-88523 is the turbine type expanding machine of the non-displacement type, but known as a displacement type expanding machine are a piston type expanding machine and a vane type expanding machine.
Each of the machines disclosed in the Japanese Patent Application Laid-open No. 59-41602 and the Japanese Patent Application Laid-open No. 60-206990 comprises the plurality of vane type rotary machines disposed inside and outside in the radial directions, and the vane type rotary machine has a simple structure of a conversion mechanism between pressure energy and mechanical energy and can deal with a large flow amount of working fluid with a compact structure, while there is a problem that a large leak amount of the working fluid from a slide portion of the vane makes it difficult to increase efficiency.
The radial plunger pump described in the Japanese Patent Application Laid-open No. 64-29676 has high sealing performance of a working fluid because the working fluid is compressed by a piston slidably fitted to the cylinder, and can minimize an efficiency reduction due to a leak even when using a high pressure working fluid, while there is a problem of requiring a crank mechanism or slanting mechanism for converting reciprocating motion of the piston into rotary motion, which makes the structure complex.
Therefore, it is desirable to make a rotary type fluid machine, vane type flu
Endoh Tsuneo
Honma Kensuke
Arent Fox Kintner & Plotkin & Kahn, PLLC
Denion Thomas
Honda Giken Kogyo Kabushiki Kaisha
Trieu Thai-Ba
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