Ejector with adjustable throat opening

The invention relates to the technical field of ejectors, in particular to a throat opening adjustable ejector which comprises a Rafael nozzle and an opening adjusting mechanism, a throat is arranged in the middle of the Rafael nozzle, the opening adjusting mechanism is mounted on the throat and comprises a motor and a transmission mechanism, at least three fan-shaped blades capable of being spliced into a circle are arranged in the throat, and the motor is connected with the motor. The blade can adjust the throat opening degree through the rotation angle, the motor is connected with the blade through the transmission mechanism, and the motor can drive the blade to rotate by the rotation angle through the transmission mechanism; the rafel nozzle has the beneficial effects that the throat opening degree of the rafel nozzle is adjusted through the blades, the flow separation phenomenon is small, and energy loss is small. 本发明涉及喷射器技术领域，具体是一种喉部开度可调式喷射器，包括拉法尔喷嘴、开度调节机构，拉法尔喷嘴的中部为喉部，开度调节机构安装在喉部，开度调节机构包括电机和传动机构，喉部内部设有能