Honda Giken Kogyo Kabushiki Kaisha

Honda Motor Co., Ltd.

Naoki Itoh

Tsuneo Endoh

Kenji Matsumoto

Tsutomu Takahashi

Kensuke Honma

Naoki Kuno

Yoichi Kojima

Hiroyuki Makino

Yasunobu Kawakami

Naoki Ohta

Takashi Sakakibara

Ryuji Sano

Yuuji Miki

Atsushi Koizumi

A turbine () includes: a turbine impeller chamber () having a tubular outflow portion (), from which an exhaust gas flows out in an outflow direction (F) substantially parallel to an axis (C) of a turbine impeller (); a bypass flow passage () bypassing the inside of the turbine impeller chamber; an outer duct () having an inner peripheral surface () that expands in diameter in the outflow direction from the outflow portion; and an inner duct () that extends in the outflow direction from the outflow portion. A diffuser flow passage () that expands in diameter in the outflow direction is disposed in the inner duct at least in a portion between the outflow portion and a distal end portion (). An outlet () of the bypass flow passage and a waste gate valve () that opens and closes the outlet are disposed on the inner peripheral surface.

Turbine

A compressor includes an impeller having a rotational axis. An annular diffuser is provided around the rotational axis to surround the impeller in order to decelerate the fluid discharged from the impeller in a centrifugal direction with respect to the rotational axis. The annular diffuser includes first vanes and second vanes. The first vanes are arranged in a first blade row extending in a circumferential direction around the rotational axis such that two adjacent vanes among the first vanes do not define a throat therebetween viewed along the rotational axis. The second vanes are arranged in a second blade row which extends in the circumferential direction and which is provided farther than the first blade row in the centrifugal direction from the rotational axis. A number of the second vanes is two times or more as large as a number of first vanes.

Compressor with annular diffuser having first vanes and second vanes

A rotary valve for switching supply passages, and discharge passages of high-temperature and high-pressure steam for a rotor rotatably supported at a casing is constructed by making a fixed side valve plate and a movable side valve plate abut to each other on a slide surface. A pressure chamber into which the high-temperature and high-pressure steam is introduced from the supply passage is opened to a mating surface of a valve body portion with the fixed side valve plate. The fixed side valve plate supported to float is pressed against the movable side valve plate with a pressing load generating in the pressure chamber to bring it into close contact with the slide surface. Leakage of the high-temperature and high-pressure steam from the pressure chamber is prevented by placing a V-packing inside the pressure chamber.

Rotating fluid machine

A Rankine cycle system is provided in which, with regard to a given relationship between the pressure (Pevp) and the temperature (Tevp) of a vapor that is taken into an expander () that includes a cylinder chamber in a first stage and a vane chamber in a second stage, the chambers being disposed in line, the expansion ratio of the vapor that the expander () takes in and discharges is set at a predetermined expansion ratio (&#x3b5;) according to the given relationship so that the pressure (Pexp) and the temperature (Texp) of the vapor that is discharged from the expander () coincide with target values, thereby making the expander () and the condenser () exhibit maximum performance. Since the vapor within the cylinder chamber in the first stage is in a superheated vapor region and contains no water, the phenomenon of water hammer will not be caused in the cylinder chamber. Furthermore, since the vapor at the exit of the vane chamber is in a saturated vapor region and contains water, the vane chamber can be lubricated and sealed by means of the water.

Rankine cycle device

A rotary fluid machine includes a first operating part () and a second operating part (), which are groups of axial piston cylinders, wherein a rotary valve () for controlling the intake and discharge of a working medium to and from the first and second operating parts () is formed from a first valve part that has a flat sliding surface () perpendicular to a rotational axis (L) of the rotor () and controls the intake and discharge of the working medium to and from the first operating part (), and a second valve part that has a cylindrical sliding surface () centered on the rotational axis (L) of the rotor () and controls the intake and discharge of the working medium to and from the second operating part (). Since the intake and discharge of the working medium to and from the first and second operating parts () are controlled by the common rotary valve (), the size of the rotary fluid machine can be reduced.

Rotary hydraulic machine

In a rotary fluid machine including pistons () reciprocally received in cylinders () provided in a rotor (), and vanes () fitted in vane grooves provided in the rotor () for reciprocal movement, the rotor () includes a rotor core () which is supported on a rotary shaft () and in which the cylinders () are accommodated, and twelve rotor segments () separated in a circumferential direction and fixed to surround an outer peripheral surface of the rotor core (); and each of the vane grooves () is defined between the adjacent rotor segments (). Thus, the dimensional accuracy of the vane grooves () can be enhanced without need for a special accurate working or processing. In addition, the transmission of heat from the rotor core () of a relatively high temperature to the rotor segments () of a relatively low temperature can be blocked, whereby the dissipation of the heat to the outside of the rotor () can be suppressed, leading to an enhancement in heat efficiency, and moreover, the thermal deformation of various portions of the rotor () can be moderated.

Rotary fluid machine having rotor segments on the outer periphery of a rotor core

An expansion unit ( ) for converting an expansion energy of pressure-increased steam into a rotation energy of an output shaft, wherein a cover member ( ) is provided on the casing outer surface of the expansion unit ( ). The cover member ( ) has a function of sealing the end section of an output shaft ( ) protruding beyond the casing outer surface against the outside and a function of recovering steam led out from the casing and has its pressured reduced after the conversion. The end section of the output shaft ( ) provided inside the cover member ( ) and a driven-side transmission shaft ( ) disposed outside the cover member ( ) are coupled with each other via a magnet type shaft coupling ( ) so as to be able to transmit power, whereby the output shaft ( ) and the driven-side transmission shaft ( ) can be coupled without steam in the expansion unit leaking outside.

Coupling structure for expansion unit output shaft and driven-side transmission shaft

A fiber-reinforced ceramic green body having enough green strength and handling strength. The fiber-reinforced ceramic green body is obtained by molding a ceramic composition comprising a ceramic powder, a sintering aid powder, an organic fiber, an aqueous dispersion medium and an optional dispersant. The organic fiber is contained in the ceramic green body in an amount of 0.2-3 parts by weight based on 100 parts by weight of a total of the ceramic powder and the sintering aid powder and uniformly dispersed throughout it. The average length of the organic fiber is 300-1000 &mgr;m and the average diameter is 2.5-30 &mgr;m. The organic fiber is preferably a synthetic high polymer such as polyester, nylon, etc., and preferably has a hydrophilic nature imparted by surface treatment.

Growing community of inventors

Wako, Japan

Naoki Itoh