Rotary hydraulic machine
A rotary fluid machine includes a first operating part ( 49 ) and a second operating part ( 57 ), which are groups of axial piston cylinders, wherein a rotary valve ( 61 ) for controlling the intake and discharge of a working medium to and from the first and second operating parts ( 49, 57 ) is formed from a first valve part that has a flat sliding surface ( 68 ) perpendicular to a rotational axis (L) of the rotor ( 27 ) and controls the intake and discharge of the working medium to and from the first operating part ( 49 ), and a second valve part that has a cylindrical sliding surface ( 71 ) centered on the rotational axis (L) of the rotor ( 27 ) and controls the intake and discharge of the working medium to and from the second operating part ( 57 ). Since the intake and discharge of the working medium to and from the first and second operating parts ( 49, 57 ) are controlled by the common rotary valve ( 61 ), the size of the rotary fluid machine can be reduced.
1. A rotary fluid machine comprising:
a casing ( 11 );
a rotor ( 27 ) rotatably supported in the casing ( 11 );
a first operating part ( 49 ) and a second operating part ( 57 ) provided in the rotor ( 27 ); and
intake/discharge control means ( 61 ) for controlling the intake and discharge of a working medium to and from the first operating part ( 49 ) and the second operating part ( 57 ), the intake/discharge control means ( 61 ) being provided between the casing ( 11 ) and the rotor ( 27 );
wherein the intake/discharge control means ( 61 ) is formed from a first rotary valve ( 63 , 64 ) that has a flat sliding surface ( 68 ) perpendicular to a rotational axis (L) of the rotor ( 27 ) and controls the intake and discharge of the working medium to and from the first operating part ( 49 ), and a second rotary valve ( 70 , 27 ) that has a cylindrical sliding surface ( 71 ) centered on the rotational axis (L) of the rotor ( 27 ) and controls the intake and discharge of the working medium to and from the second operating part ( 57 ).
2. The rotary fluid machine according to claim 1 wherein the first rotary valve ( 63 , 64 ) controls the intake and discharge of a high pressure working medium, and the second rotary valve ( 70 , 27 ) controls the intake and discharge of a low pressure working medium.
3. The rotary fluid machine according to claim 1 wherein the first rotary valve ( 63 , 64 ) controls the intake and discharge of a high temperature working medium, and the second rotary valve ( 70 , 27 ) controls the intake and discharge of a low temperature working medium.