| 摘要 |
<p>A gyratory crusher hydraulic pressure relief valve (20) comprises a hydraulic fluid vestibule (54), which is adapted to be fluidly connected to a hydraulic fluid space (24) of a gyratory crusher (2), a logic element (72) which is adapted for dumping hydraulic fluid from the hydraulic fluid space (24) and which comprises a plunger (74) which has a first plunger surface (76) and a second plunger surface (78), and a control pipe (56) which is adapted for fluidly connecting the second plunger surface (78) to the hydraulic fluid vestibule (54). A supply orifice (66) restricts the flow of hydraulic fluid from the vestibule (54) towards the second plunger surface (78) to make the time TC it takes for the logic element (72) to switch from open position to closed position exceed the time TF it takes for a closed side setting position of the crusher (2) to make one full round.</p> |
