| 摘要 |
An exemplary rotary valve is disclosed and includes a first valve member having a first aperture and a second valve member having a second aperture, the first and second apertures being at least partially aligned to define an extent of overlap. The rotary valve also includes a first driving mechanism and a third valve member having a third aperture disposed between the other valve members. The first driving mechanism drives the third valve member in movement to move the third aperture along a path across the extent of overlap to cooperate with the other apertures. The third valve member blocks a passage of fluid between the first and second apertures when it is spaced from the extent of overlap. The rotary valve also includes a second driving mechanism engaged with the first or second valve member and operable to drive that valve member in movement to change the overlap. |
