矿用防爆无轨胶轮车湿式制动器制动工况的温升分析

Temperature rise analysis of braking condition of wet brake for mine-used flame-proof trackless rubber-tyred vehicle

针对某矿用防爆无轨胶轮车用湿式制动器在持续坡路工况下摩擦片发热量大,造成密封圈、回位弹簧等部件频繁损坏的问题,使用有限元分析技术,对湿式制动器在紧急制动工况和匀速制动工况两种典型工况进行热-结构耦合分析。由分析结果可知,湿式制动器在紧急制动工况下温升达到21.53℃/s,在匀速制动工况下达到22.67℃/s。利用分析结果可验证湿式制动器结构设计的合理性;同时针对常规自然冷却的湿式制动器无法满足持续坡路工况使用需求的问题,利用分析结果可为湿式制动器强制冷却系统的设计及散热性能计算提供理论依据。

Aiming at the problems of frequent damage to sealing rings,return springs and other parts caused by large heat generated by friction plates of the wet brake in a mine-used flame-proof trackless rubber-tyred vehicle under continuous slope condition,a finite element analysis technology was used to conduct thermalstructure coupling analysis of the wet brake under two typical working conditions:emergency braking and constant-speed braking.According to the analysis result,the temperature rise of the wet brake reached 21.53°C/s under the emergency braking condition,and 22.67 C/s under the constant-speed braking condition.Therefore,the analysis result could be used to verify the rationality of the structural design of the wet brake.At the same time,in response to the problem that the conventional naturally-cooled wet brake could not meet the requirements of continuous slope conditions,the analysis result could offer a theoretical basis for the design and heat dissipation performance calculation of the forced cooling system of the wet brake.