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1 引言QQ561双向行驶自卸车是根据坑道、隧洞运输作业特点而设计制造的一种专用车。该车制动器采用气压驱动内张蹄片简单非平衡式和双管路气压式制动传动机构。这种制动系统具有结构简单、生产成本低、工作可靠、操纵轻便等优点。但在跟踪使用调查中发现,常因制动器工作温度过高,导致摩擦系数大幅度下降,严重时会使摩擦片表面变质、烧焦、轮胎爆胎、气门嘴磨损、内胎老化等问题,使用寿命很低。
1 Introduction QQ561 two-way traveling dump truck is based on tunnels, tunnel transport operations designed and manufactured a special vehicle. The car brakes use air pressure to drive the inner and outer shoe simple non-balanced and double pipe pneumatic brake transmission. This braking system has the advantages of simple structure, low production cost, reliable operation and convenient operation. However, the use of tracking survey found that often because of the brake operating temperature is too high, leading to a substantial decline in friction coefficient, serious friction plate surface will be deteriorated, scorching, tire puncture, valve wear, inner tube aging and other issues, the service life Very low.