| 摘要 |
<p>In the first position, a radial channel (10) of the left metering chamber (4) and a radial channel (8) of the sleeve (1) are connected to each other and to a dosing chamber (6) with an inlet p1pe (17). Partitions (3) split a rotor (2) into chambers (4) and fluid from a source is passed through the pipe (17) and the channels (8,10) into the chamber (6) of the left chamber (4), moving a floating piston (5) and forcing control fluid from a cavity (7) through radial channels (11), circular borings (12) and a pipe (13). The piston (5) of the central chamber (4) moves left, forcing dosed fluid from the chamber (6) of the central chamber (4) through the radial channels (9,10). After rotation of the rotor (2) through 120 degs. the channels (10,8) are connected, allowing dosed fluid to pass through the pipe (17) into the chamber (6) of the central chamber (4), moving the piston (5) to eject control fluid into the actuating chamber (7) of the right chamber (4). After further rotation through 120 degs. the chamber (6) of the right chamber (4) is filled and a dose of fluid is forced from the chamber (6) of the left chamber (4) through a channel (9). The size of the dose is controlled by a moving piston (15) of a hydrocylinder (14), to regulate the amount of control fluid in the chambers (4) and the initial positions of the piston (5).</p> |
