During different lift range phases when a CAM controls the distribution spool of a giant hydraulic press, the CAM's requirement for the pressureAngle of its theoretical working profile is different.
凸轮机构控制巨型液压机分配阀芯时，在不同的升程阶段对凸轮理论工作曲线压力角有不同的要求。
2
Finally, the coal-rock mass in the arch angle and apex is slided, and causes the distortion of local rock pressure, even induces dynamic hazards around working face.
拱角与拱顶煤岩滑落失稳，造成工作面局部压力畸变并诱发动力学灾害。
3
When the pressure decreases, variable pump will detect this change and automatically increase the angle to augment flow capacity, which causes the grab back to normal working condition.