在液压螺旋锤与大型摩擦螺旋压力机中常采用摩擦式飞轮保险装置(图1)。当螺杆轴踵上的载荷(注1)达到打滑压力Ps时,飞轮外环相对于内环滑动,使部分能量消耗于内、外环间的摩擦,从而减少了打击能量,也就减小了打击力。这样,就可防止受力零件因超载而破坏,达到保护机器的目的。目前,在国内 Frictional flywheel safety devices are often used in hydraulic screw hammers and large friction screw presses (Figure 1). When the load on the screw shaft’s heel (Note 1) reaches the slippage pressure Ps, the outer ring of the flywheel slides relative to the inner ring, so that part of the energy is consumed by the friction between the inner ring and the outer ring, thereby reducing the striking energy, Strike force. In this way, to prevent the force components destroyed due to overload, to protect the machine’s purpose. At present, at home