Reaction engine (1) which comprises a compressor block (2) equipped with at least a compressor intended to carry out a compression of air that enters the engine (1) and which comprises, in turn, a rotor (3) and a stator (4), a combustion block (5) which comprises at least a combustion chamber (5) intended to house an ignition of a fuel together with high pressured air coming from the compressor block (2), at least a turbine (6) actuated by exhaust gases produced in the combustion chamber (5) and which comprises a torque transmission system with at least a shaft (7) which is joined to at least the compressor (2) thus carrying out the aforementioned compression of air, whereby the stator (4) of the compressor (2) is eccentric with respect to the rotor (3) which permits the alternative radial displacement of an array of radial blades (8) disposed on the rotor (3) to carry out the closure in the radial direction of the array formed by the rotor (3) and the stator (4).

A compound engine system (8) comprises a rotary engine (10) having a volumetric compression ratio lower than its volumetric expansion ratio. A recess (38) defined in the peripheral wall (28) of the rotor (24) in each of the chambers (32) has a volume of more than 5% of the displacement volume of the chamber (32). The expansion in a turbine section (13) of the system compensates for the relatively low expansion ratio of the rotary engine (10).

Summary

Purpose: To provide a fluid machine, the production efficiency and maintenance characteristics of which can be improved while performance is ensured.

Means to attain the purpose: A fluid machine (14, 102, 108) has a plurality of fluid units (16, 20) that include rotating bodies (40, 66) and suck/discharge a working fluid along with the rotation of the rotating bodies, and a drive shaft (72) connected with the rotating bodies of the fluid units; and an Oldham's coupling (85) is mounted on a shaft portion between each two adjacent rotating bodies of the drive shaft.

An axial flow positive displacement gas turbine engine component (3) such as a compressor or a turbine or an expander (88) includes a rotor assembly (15) extending from a fully axial flow inlet (20) to a downstream axially spaced apart axial flow outlet (22). The rotor assembly (15) includes a main rotor (12) and one or more gate rotors (7) rotatable about parallel main and gate axes (16, 18) of the main and gate rotors (12, 7) respectively. The main and gate rotors (12, 7) having intermeshed main and gate helical blades (17, 27) extending radially outwardly from annular main and gate hubs (51, 53), circumscribed about, and wound about the main and gate axes (16, 18) respectively. Intersecting main and gate annular openings (10, 11) in the axial flow inlet (20) extend radially between a casing (9) surrounding the rotor assembly (15) and the main and gate hubs (51, 53). The main helical blades (17) transition from 0 to a full radial height (H) in a downstream direction (D) in an inlet transition section (28).

A system for utilizing waste heat from a vehicle has a Rankine circuit, and the Rankine circuit includes a fluid machine. A generating unit of the fluid machine has a third rotating body that is disposed coaxially with a first rotating body of a pump unit and a second rotating body of an expansion unit. The fluid machine has a drive shaft that is integrally connected at least to the first rotating body, among the first, second and third rotating bodies, and a power transmission unit that is connected to the drive shaft and transmits external power to the drive shaft.

In a rotary fluid machine for converting the reciprocal movement of pistons (41) and the rotational movement of a rotor (31) from one into another by the engagement of rollers (59) and annular grooves (60) with each other, a value in a positive peak region of a pressure load of pistons (41) received by the rollers (59) engaged in the annular grooves (60) and a value of a positive peak region of a centrifugal force load received by the rollers (59) are set, so that they are substantially equal to each other, and phases of the two peak regions are deviated from each other. In addition, the phase of a negative peak region of a vane (42) pushing-down load received by the rollers (59) and the phase of the positive peak region of the pressure load of the pistons (41) received by said rollers (59) are established, so that they are overlapped at least partially on each other. Thus, a peak value of a total load received by the rollers (59) and an amount of variation in the load can be suppressed to a small level to provide an enhancement in durability of the rollers (59).

In a rotary fluid machine including pistons (37) reciprocally received in cylinders (33) provided in a rotor (27), and vanes (44) fitted in vane grooves provided in the rotor (27) for reciprocal movement, the rotor (27) includes a rotor core (31) which is supported on a rotary shaft (21) and in which the cylinders (33) are accommodated, and twelve rotor segments (32) separated in a circumferential direction and fixed to surround an outer peripheral surface of the rotor core (31); and each of the vane grooves (43) is defined between the adjacent rotor segments (32). Thus, the dimensional accuracy of the vane grooves (43) can be enhanced without need for a special accurate working or processing. In addition, the transmission of heat from the rotor core (31) of a relatively high temperature to the rotor segments (32) of a relatively low temperature can be blocked, whereby the dissipation of the heat to the outside of the rotor (27) can be suppressed, leading to an enhancement in heat efficiency, and moreover, the thermal deformation of various portions of the rotor (27) can be moderated.

Rotary type fluid machine includes a casing 7, a rotor 31 and a plurality of vane-piston units U1-U12 which are disposed in a radiate arrangement on the rotor 31. Each of the vane-piston units U1-U12 has a vane 42 sliding in a rotor chamber 14 and a piston 41 placed in abutment against a non-slide side of the vane 42. When it functions as an expanding machine 4, the expansion of a high pressure gas is used to operate the pistons 41 thereby to rotate the rotor 31 via vanes 42 and the expansion of a low pressure gas caused by a pressure reduction in the high pressure gas is used to rotate the rotor 31 via the vanes 41. On the other hand, when it functions as a compressing machine, the rotation of rotor 31 is used to supply a low pressure air to the side of pistons 41 via vanes 42 and further, the pistons 41 are operated by the vanes 42 to convert the low pressure air to the high pressure air. Thus, a rotary type fluid machine having expanding and compressing functions, with the merits belonging to the piston type and the merits belonging to the vane type, can be provided.