论文部分内容阅读
新修订的国家标准GB 7588—2003《电梯制造与安装安全规范》,对电梯产品的制造、安装增加了电梯应有轿厢上行超速保护的要求,弥补了电梯运行时只有下行超速保护而无上行超速保护的不足,电梯安全运行可靠性得到了近一步提升。以本市某单位1台乘客电梯验收检验的个案为例,拟本文导出与同行讨论轿厢上行超速保护装置的话题。 1 轿厢上行超速的可能性电梯在向上会出现超速运行有以下几种可能: 1)由电路控制失控引起的电梯过速,导致轿厢上行超速; 2)由制动器抱闸装置失效(如销轴脱落或闸皮
The newly revised national standard GB 7588-2003 “Elevator manufacturing and installation of safety norms” on the elevator product manufacturing and installation of an elevator car to increase the speeding up the uplink requirements to make up for the lift operation only the downlink speeding without the uplink Insufficient speeding protection, the safe operation of the elevator has been further improved the reliability. Taking the case of a passenger acceptance inspection of a passenger in a certain city in this Municipality as an example, it is proposed that the topic of discussing the uplink speeding protection device for car upstream with colleagues is proposed. 1 Possibilities of Overspeed Overspeed in Elevator There are several possibilities for the overextension of the elevator in the upward direction: 1) Overspeed of the elevator caused by uncontrolled circuit control, resulting in overspeeding of the car; 2) failure of the brake by the brake device Shaft off or brake lining