| 摘要 |
<p>A rotary valve (10-16) for changing the connection of the fluid inlet passages and the fluid outlet passages (44) of a gerotor type fluid rotary machine in which the fluid is contracted and expanded by a plurality of cavities defined by the teeth (80) formed on a stator (24) and a rotor (56) in response to the orbital rotation of the rotor (56) formed with one less external teeth than the number of the internal teeth (60) on the stator (24). The rotary valve selectively communicates the fluid passages (44) with the gerotor cavities by means of its rotary commutator (10) which orbits with a phase difference of 90 DEG with respect to the gerotor rotor, and the commutator (10) is rotatably accommodated in a spacer (14) disposed between an end cover (18) and a port member (12) havin a plurality of fluid passages (44). The clearance at each side of the commutator (10) is permanently determined by means of the width of the spacer (14). The commutator (10) comprises spaced members (72, 74) that move in unison with radially spaced sealing rings (76, 78) interposed between the two members (72, 74).</p> |
