Abstract Safety gear is one of the most important devices of elevators for its core function is to brake the over-speed cabin with friction. The frictional braking of elevator safety gear is a fully coupled thermo-mechanical process, and therefore both the thermal performance and the mechanical properties during braking should be comprehended for the tribological design of a high-speed elevator safety gear. In this work, a fully coupled model is developed to investigate the thermo-mechanical behaviors during emergency braking of a progressive safety gear. In the proposed model, the frictional sliding during braking is treated as the interfacial failure of the contact surface, and the transient thermo-mechanical analysis is performed using the explicit scheme. With the developed model, the contact temperature, the braking deceleration, the stress and deformation are examined. The analysis shows that the predicted temperature at the check points is consistent with results of experiment, and the simulated braking deceleration agrees well with the test results. The developed model can be utilized to simulate the braking performance of safety gear for a high-speed elevator.

中文翻译：

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电梯安全钳摩擦制动热力学建模及瞬态分析

摘要 安全钳是电梯最重要的装置之一，其核心功能是摩擦制动超速舱。电梯安全钳的摩擦制动是一个全耦合的热机械过程，因此高速电梯安全钳的摩擦学设计应综合考虑制动时的热性能和机械性能。在这项工作中，开发了一个完全耦合的模型来研究渐进式安全钳紧急制动期间的热机械行为。在所提出的模型中，将制动过程中的摩擦滑动视为接触面的界面失效，并使用显式方案进行瞬态热机械分析。随着开发的模型，接触温度，制动减速度，检查应力和变形。分析表明，各检查点预测温度与试验结果一致，模拟制动减速度与试验结果吻合较好。所开发的模型可用于模拟高速电梯安全钳的制动性能。