由于内燃机车在长期线路运行中的颠簸和机车柴油机本身的振动,必然导致制动阀座组装管路与挡板、管座配合孔之间相互碰撞和摩擦,造成了制动阀座组装各管路破损及断裂。先看它们的配合间隙(参看图1),闸缸管、作用筒管、缓解管、平均管、均衡风缸管都是外径为φ14的管子,管座和挡板配合孔直径是φ15,此间隙是1毫米,总风管和制动管(列车管)外径是φ32,挡板和管座配合孔直径是φ36,此间隙是4毫米,在组装时制动阀 Due to the bump of diesel locomotive running in long-term route and the vibration of locomotive diesel engine itself, the brake valve seat assembling pipe and the baffle and the pipe seat collide and collide with each other and cause the brake valve seat to assemble each pipe Road damaged and broken. First look at their cooperation gap (see Figure 1), gate cylinder, the role of the tube, ease the tube, the average tube, the balance of the cylinder tube is the outer diameter of φ14 pipe, tube seat and the baffle with the hole diameter φ15, This gap is 1 mm, the total duct and brake pipe (train tube) diameter is φ32, baffle and pipe seat with a diameter of φ36, the gap is 4 mm, the brake valve assembly