| 摘要 |
<p>An injection nozzle (20, 200, 300, 400) is provided having a nozzle body (21, 201, 301, 402), defining an inlet channel (36, 312, 414), an outlet channel (34, 218, 314, 418) and a connecting channel (27, 212, 316, 416) therebetween for communicating a working fluid into and out of the nozzle body (21, 201, 301, 402). A shut-off pin (24, 202, 304, 406) is slidably mounted within the nozzle body (21, 201, 301, 402) and having a spigot (38, 204, 318, 409) mounted thereto. The shut-off pin (24, 202, 304, 406) is movable between a closed position, where the working fluid is substantially blocked from moving from the inlet channel (36, 312, 414) to the outlet channel (34, 218, 314, 418), and an open position where the spigot (38, 204, 318, 409) is withdrawn, unblocking the working fluid from moving from the inlet channel (36, 312, 414) to the outlet channel (34, 218, 314, 418). An actuator (28) is operably connected to the shut-off pin (24, 202, 304, 406) to move the shut-off pin (24, 202, 304, 406) from the open position to the closed position. Moving the shut-off pin (24, 202, 304, 406) from the open position to the closed position generates a region of low pressure in the working fluid in the portion of working fluid trailing the spigot (38, 204, 318, 409).</p> |
