Rotary fluid machinery, vane fluid machinery, and waste heat recovery device of internal combustion engine

A waste heat recovering device for an internal combustion engine, having an evaporating machine (3) using waste heat from an internal combustion engine (1) as a heat source to generate high pressure vapor, an expanding machine (4) for generating an output by expansion of said high pressure vapor, and a condensing machine (5) for liquefying low pressure vapor exhausted from the expanding machine (4), characterized in that said expanding machine (4) includes a casing (7) having a rotor chamber (14), a rotor (31) accommodated in the rotor chamber (14), and a plurality of vanes (42) which are radially disposed in said rotor (31) around a rotary axis (L) thereof and freely reciprocated in the respective radial directions, a section (B) of said rotor chamber (14) in a phantom plane (A) including the rotary axis (L) of said rotor (31) being formed of a pair of semi-circular sections (B1) with diameters (g) thereof opposed to each other and a rectangular section (B2) formed by connecting opposed one ends of both the diameters (g) to each other and opposed other ends of the diameters to each other, respectively, each of the vanes (42) comprising a vane body (43) and a seal member (44) mounted to the vane body (43) and pressed against said rotor chamber (14) with a spring force, and the seal member (44) having a semi-circular arcuate portion (55) sliding on an inner peripheral surface (45) defined by said semi-circular section (B1) of said rotor chamber (14) and a pair of parallel portions (56) respectively sliding on opposed inner end surfaces (47) defined by said rectangular section (B2).

A rotary type fluid machine having an expanding function and a compressing function, including a casing (7) having a rotor chamber (14), a rotor (31) accommodated in the rotor chamber (14), and a plurality of vane-piston units (U1-U12) which are radially disposed in said rotor (31) around a rotary axis (L) thereof and freely reciprocated in the respective radial directions, each of the vane-piston units (U1-U12) including a vane (42) sliding in said rotor chamber (14) and a piston (41) placed in abutment against a non-slide side of the vane (42), wherein when functioning as an expanding machine (4), expansion of a high pressure fluid is used to operate said piston (41) to rotate said rotor (31) via a power conversion device, and expansion of a low pressure fluid caused by a pressure reduction in said high pressure fluid is used to rotate said rotor (31) via said vane (42), while when functioning as a compressing machine, rotation of said rotor (31) is used to supply a low pressure fluid to the side of said piston (41) via said vane (42) and said piston (41) is operated by said vane (42) to convert said low pressure fluid to a high pressure fluid,

• characterized in that said fluid machine includes fluid exhausting means (121, 122, 123) for maintaining an airtight state between said piston (41) and a cylinder (39) during a stroke of the piston (41) sliding in the cylinder (39) formed in said rotor (31), and for exhausting a fluid stored in the cylinder (39) outwardly of the cylinder (39) at a stroke end of the piston (41).

A rotary type fluid machine having an expanding function and a compressing function, including a casing (7) having a rotor chamber (14), a rotor (31) accommodated in the rotor chamber (14), and a plurality of vane-piston units (U1-U12) which are radially disposed in said rotor (31) around a rotary axis (L) thereof and freely reciprocated in the respective radial directions, each of the vane-piston units (U1-U12) including a vane (42) sliding in said rotor chamber (14) and a piston (41) placed in abutment against a non-slide side of the vane (42), wherein when functioning as an expanding machine (4), expansion of a high pressure fluid is used to operate said piston (41) to rotate said rotor (31) via a power conversion device and expansion of a low pressure fluid caused by a pressure reduction in said high pressure fluid is used to rotate said rotor (31) via said vane (42), while when functioning as a compressing machine, rotation of said rotor (31) is used to supply a low pressure fluid to the side of said piston (41) via said vane (42) and said piston (41) is operated by said vane (42) to convert said low pressure fluid to a high pressure fluid,

• characterized in that first passages (142, 143) for supplying and exhausting a high pressure fluid to a cylinder (39) formed in said rotor (31) and second passages (144, 145) for supplying and exhausting a low pressure fluid from said cylinder (39) to a rotor chamber (14) are formed in a fixed shaft (65), and
• that a conversion mechanism (64) which is rotated integrally with said rotor (31) to selectively connect said first passages (142, 143) or said second passages (144, 145) to the cylinder (39) is fitted rotatably and in a sealing condition relative to said fixed shaft (65).

A rotary type fluid machine having an expanding function and a compressing function, including a casing (7) having a rotor chamber (14), a rotor (31) accommodated in the rotor chamber (14), and a plurality of vane-piston units (U1-U12) which are radially disposed in said rotor (31) around a rotary axis (L) thereof and freely reciprocated in the respective radial directions, each of the vane-piston units (U1-U12) including a vane (42) sliding in said rotor chamber (14) and a piston (41) placed in abutment against a non-slide side of the vane (42), wherein when functioning as an expanding machine (4), expansion of a high pressure fluid is used to operate said piston (41) to rotate said rotor (31) via a power conversion device and expansion of a low pressure fluid caused by a pressure reduction in said high pressure fluid is used to rotate said rotor (31) via said vane (42), while when functioning as a compressing machine, rotation of said rotor (31) is used to supply a low pressure fluid to the side of said piston (41) via said vane (42) and said piston (41) is operated by said vane (42) to convert said low pressure fluid to a high pressure fluid,

• characterized in that first passages (94, 95) for supplying and exhausting a high pressure fluid to a cylinder (39) formed in said rotor (31) and second passages (102, 103) for supplying and exhausting a low pressure fluid from said cylinder (39) to a rotor chamber (14) are formed in a fixed shaft (65),
• that a conversion mechanism (64) which is rotated integrally with said rotor (31) to selectively communicate said first passages (94, 95) or said second passages (102, 103) to the cylinder (39) is fitted rotatably and in a sealing condition relative to said fixed shaft (65), and
• that port grooves (124, 125) surrounding outer peripheries of said first passages (94, 95) are formed on a slide surface between the fixed shaft (65) and the conversion mechanism (64).