| 摘要 |
The invention relates to a hydraulic ejector with pulse action. According to the invention, it comprises a hydropneumatic accumulator 1, connected to an inlet pipe 2 of an oscillation generator 3 having a body 4 enclosing a main piston 5, forming therein a cavity 6 downstream of the seat and a cavity 7 on the piston side, connected to a constant pressure source 8 and a second hydropneumatic accumulator 9 with a diaphragm 10 below which there is arranged, in a cavity 11, a piston 12 having a rod 13, interacting with the main piston 5 and forming a cavity 14, on the rod side, separated from the cavity 7, on the piston side, by a partition 15 and communicating with the atmosphere whilst the cavity 11 is joined by a bypass tube 17 fitted with a choker valve 18 to an outlet pipe 19, with, in the cavity 6, downstream of the seat of the body 4, a sleeve 21 in which the main piston is arranged in such a way that it can move, this sleeve forming, in the body 4, a cavity 22 connected to the conduit 19. The invention applies in particular to mining engineering. <IMAGE>
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