“限速器-安全钳”系统是电梯的一个十分重要的安全保护装置,当电梯超速、运行失控或悬挂装置断裂等紧急状况发生时,限速器动作后,在安全钳楔块与导轨相互摩擦和安全钳自锁的共同作用下,能在较短时间内将电梯轿厢夹持在导轨上,并保持静止状态,从而降低人员伤亡及设备损坏的程度。楔块作为电梯轿厢与导轨直接作用的元件,其摩擦性能的可靠和稳定,直接决定了电梯在紧急状况下制动的可靠性。伴随近十年来中国经济的持续稳定发展,高层建 “Speed ​​limiter - safety clamp ” system is a very important elevator safety protection device, when the elevator speeding, running out of control or suspension device rupture and other emergency situations, the speed limiter action, the safety gear wedge and Rail friction and self-locking safety gear under the joint action, the elevator car can be caught in a short period of time on the rail, and remain stationary, thereby reducing the level of casualties and equipment damage. As a component of the direct action of the elevator car and the guide rail, the friction and reliability of the wedge and the stability of the guide rail directly determine the reliability of the elevator in an emergency situation. With the sustained and steady development of China’s economy in the past decade, high-level construction