Testing table for fatigue strength of locomotive bogie

Abstract

A fatigue strength test stand of a locomotive bogie is as follows: drive eccentric shafts of a front drive eccentric wheel and a back drive eccentric wheel are fixed on one side of the bogie through a bearing and a bearing seat; driven eccentric shafts of a front driven eccentric wheel and a back driven eccentric wheel are fixed on the other side of the bogie through a bearing and a bearing seat; the front and the back drive eccentric shafts are respectively connected with a drive device. The test stand can simulate the vertical vibration, the transverse vibration, the nodding and the compound vibration of the bogie in full range so as to truly measure the fatigue life of the bogie, thereby determine the life cycle, and providing reliable guarantee for the safe operation of the locomotive. The test stand has the advantages of simple structure and convenient operation.

Description

Technical field [0001] The invention relates to a running part of a locomotive and a bogie fatigue strength test bench. Background technique [0002] The failure of the running part of the vehicle will directly threaten the driving safety. To balance safety and efficiency, it is necessary to determine the service life of the running part and arrange a reasonable maintenance cycle. At present, there is no good solution for the overall fatigue strength test method of the bogie. Usually, the frame of the bogie is simulated and loaded with a multi-head hydraulic cylinder according to the UIC615-4 standard, that is, the dynamic force is applied to the bogie through the multi-head hydraulic cylinder. Varying loads to simulate bogie vibrations caused by track irregularities passing through wheelsets. In this hydraulic vibration process, it is very difficult to distribute the load of each cylinder head and its changes to truly simulate the vibration of the bogie; limited by the hyd...

AI Technical Summary

Problems solved by technology

In this hydraulic vibration process, it is very difficult to distribute the load of each cylinder head and its changes to truly simulate the vibration of the bogie; limited by the hydraulic equipment, the excitation frequency is low, the highest frequency is only about 30Hz , unable to excite higher frequency vibrations

During the operation of the train, due to the bogie vibration caused by track irregularities, its frequency can be as high as hundreds of hertz; although the high-frequency vibration amplitude is small, the one-time damage to the bogie is small, but according to the theory of fatigue damage, the damage can be Cumulative, when the damage accumulates to a certain amount, fatigue damage will occur, especially as the railway develops to high speed and heavy load, the stress amplitude increases; therefore, it is necessary to carry out an overall and full-frequency fatigue strength test on the bogie, Grasp the stress-strain development status of the coordinated deformation of each component in the full frequency band to ensure the efficient and safe operation of railway transportation

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