山地果园单向牵引式双轨运输机摩擦制动装置设计与试验

Design and test for friction braking device of mountainous orchard one-way traction double-track transport

针对山地果园单向牵引式双轨运输机运行时存在钢丝绳松脱或断裂等问题,研制了一种摩擦制动装置,在描述载物滑车总体结构的基础上,重点分析了制动装置制动过程、关键结构的受力分析及台架制动测试试验。有限元分析表明,支撑柱的最大应力为6.3 MPa,最大位移为2.1×10-5mm,且出现在支撑柱与摩擦片固定装置相连的螺栓截面上;轨道的最大应力为70.9 MPa,最大位移约为0.65 mm,且出现在直轨道与摩擦片接触面上,呈对称分布。台架试验结果表明,该制动装置的制动成功率为100%;高速摄影试验表明,随着装载质量的增大,制动时间及振幅均增加。该研究可为山地果园单向牵引式轨道运输机械的整机结构设计提供参考。

A friction braking device was designed to solve the problem of slipping accidents by wire rope loosening or fracture when the mountainous orchard one-way traction double-track transport was working. Based on analyzing the overall structure of the vehicle, this paper analyzed the braking process, key structure stress and carried out braking test. Finite element analysis showed that the maximum stress of supporting column was 6.3 MPa, the maximum displacement was 2.1 ×10^-5mm which appeared in the bolt section that was used to connect the support column and friction plate fixed device. The maximum stress of track was 70.9 MPa and the maximum displacement was 0.65 mm, which appeared in the contact surface where friction plate contacted the track surface with the stress symmetrical distributed. The bench test results showed that, the success rate of friction braking device was 100%.The high-speed photography experiment showed that with the increase of loading quality, the braking time and vibration amplitude also increased. This study can provide reference for the overall design of mountainous orchard one-way traction double-track transport.