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制动器是电梯重要的安全装置。双向推力电磁制动器是电梯常用的一种制动器,如图1所示。通电时产生双向电磁推力,使刹车机构与电机旋转部分脱离(即释放),断电时电磁力消失,在外加制动弹簧压力的作用下,形成失电制动的摩擦式制动器(以下简称制动器)。它主要与曳引机上的驱动电机配套成电梯用电磁制动三相异步电动机,广泛适用于能实现平稳停车和快速起动及在断电时安全(防险)制动的场合。这种制动器具有结构紧凑、安装方便、噪音低、振动小、电磁推力大、动作灵敏、制动可靠等优点,是一种理想的自动化控制执行元件。尽管如此,当这种制动器使用时间较长、关键零件出现老化后,其存在的
Brakes are important safety devices for elevators. Two-way thrust electromagnetic brake is a commonly used elevator brake, shown in Figure 1. Two-way electromagnetism pushing force is generated when the power is on, so that the braking mechanism and the rotating part of the motor are disengaged (ie released), and the electromagnetic force disappears when the power is off. Under the action of the external braking spring pressure, a friction brake with lost- ). It is mainly matched with the driving motor on the traction machine into an electromagnetic brake three-phase asynchronous motor for elevators. It is widely used in occasions that can achieve smooth parking and quick start and safety (anti-risk) braking when power is off. The brake has the advantages of compact structure, convenient installation, low noise, small vibration, large electromagnetic thrust, sensitive action and reliable braking, and is an ideal automatic control implementing element. In spite of this, when this type of brake is used for a long time, the key parts appear to be deteriorated after they exist