The longitudinal impact force of the train during operation is too large. (1) With the increase of the train operating speed, the increase of the tonnage of towing and the increase of the number of cars closed due to brake failure in the train, when the train is started, decelerated and braked during operation , it will have a greater longitudinal impact on the vehicle. (2) Brake cylinder piston stroke does not comply with regulations. During the overhaul, no attention was paid to the adjustment of the A-bar value of the guillotine actuator, which caused the train to be in operation and the brake wave speed was inconsistent, resulting in longitudinal impact on the train. (3) When the train encounters an unexpected situation during normal operation and an emergency braking stop is performed, the instantaneous impulse of the train is caused, in particular, the emergency braking of the train during high-speed operation is more serious. (4) During the shunting operation of the vehicle, the shunting is released, causing heavy hooking due to improper grasping of impact or speed adjustment. Problems with the shock absorber itself (1) The MX-1 rubber shock absorber has unstable rubber properties, is susceptible to temperature, and has an aging problem. (2) The speed of rubber anti-impact action is rapid, and the separation of the vehicle is easily caused during the shunting work, and when the impact force exceeds the rubber strength, the rubber is damaged. Therefore, such a buffer has become unusable with greater impact force and higher shunting impact speed. (3) The structure of the box is irrational and cracks are easily generated. The box adopts a large open structure at the bottom. When the rubber sheet is damaged and needs to be replaced, the inspection and repair operations are inconvenient. In particular, when the small mouth of the box wears out, it cannot be repaired, causing the wedge to stick out. When the vehicle is impacted, the wedge severely presses the small mouth of the box to make it crack. The coupler damper device now used has the same structure and connection as the previously used coupler shock absorber, and the longitudinal clearance between the coupler and the buffer device is too large. When the train brakes, accelerates, decelerates or the traction of the locomotive is not uniform, Vertical train impact. Buffer capacity is small. In terms of truck bumper performance requirements, it depends to a large extent on the speed at which the trucks are connected. China's 5th Railway Technical Management Regulations 6 stipulates that the speed at which the wagons of a marshalling yard are allowed to be connected shall not exceed 5km/h. If the capacity of the buffer is too small (35kJ), the buffer will be crushed to death below the allowable linking speed. As a result, a rigid impact occurs, and the impact force and impact speed increase rapidly, eventually leading to premature fatigue failure of the vehicle or damage to the loaded cargo. In the case of various impacts encountered during train operation, the reasons for the impact force caused by the shearing and breaking of the heart plate bolts are: (1) When the train passes through the turnouts and the curved road sections, the lateral swing of the vehicle is increased, and the small curve radius is generated. The centrifugal force and the high lateral pressure of the outer rail increase. (2) When the vehicle is operating in an automated hump, the speed of disassembling the vehicle is too fast, and the moment inertia of brake shoe braking occurs. (3) In the shunting operation, the linking speed is not well mastered, and the shock absorbers are all crushed to cause a rigid impact. The existence of the above reasons reflects the fact that the quality consciousness is weak and cannot be overhauled according to the standard, resulting in a weak buffer performance. In the high-speed train operation, these problems may not directly affect traffic safety, but once coupled with other bad conditions, it is easy to cause the vehicle to derail or subvert. Precautions and Suggestions for Improvement MX-1 Rubber Buffer (1) Strengthen staff's quality awareness, strictly follow process inspection, strengthen the selection of wedges and briquettes, control the amount of sticking of wedges, and ensure that the briquettes and wedges Assembly quality. (2) Since the MX-1 type rubber buffer has not been adapted to the requirements of high speed and heavy load, with the increase of the construction speed of the truck, the research and development of the large capacity new buffer should be accelerated. (3) The seizure should actively handle the brake failure vehicles in the train to reduce the longitudinal impact of the train and improve the operating conditions. (4) The inspection shall strictly control the A bar and A push value of the brake adjuster to ensure that the stroke length of the brake cylinder piston complies with the regulations. Floor Deck Roll Forming Machine Floor Deck Roll Forming Machine,Floor Steel Profile Forming Machine,Floor Metal Deck Roll Forming Machine,Floor Decking Forming Machine HEBEI SENUF MINMETALS CO. LTD , https://www.senufmachine.com
Quickly bringing trucks to slow down equipment and constrain the spring of lower frame