As the key parts in the main and auxiliary mechanism of locomotive, the test and evaluation of its performance are very important to ensure the safety and reliability of locomotive. This paper will discuss the performance testing and evaluation of the main and auxiliary linkage forgings in the main and auxiliary mechanism of locomotive.
Service performance test
Mechanical properties testing: Tensile, compression, bending and other mechanical properties of the main and auxiliary connecting rod forgings are tested to evaluate their performance under various stress conditions. Through these tests, we can understand the strength, stiffness, plasticity and toughness of the forgings, so as to determine whether it can meet the force requirements of the locomotive operation.
Fatigue performance testing: Fatigue performance testing is to evaluate the durability of the main and auxiliary link forgings under alternating loads. Fatigue test can simulate the stress of forgings during long-term operation, so as to predict their fatigue life and reliability.
Vibration performance testing: Vibration performance testing is used to evaluate the stability of the main and auxiliary link forgings during operation. Through the vibration test, the vibration response of the forging can be detected at different frequencies and amplitudes to determine whether it will cause resonance or produce excessive stress.
Temperature and thermal performance testing: Temperature and thermal performance testing is used to evaluate the thermal expansion, heat conduction and other characteristics of the main and auxiliary connecting rod forgings at different temperatures. These performance indexes are of great significance for preventing thermal damage and thermal fatigue caused by temperature changes.
Corrosion resistance testing: Corrosion resistance testing is used to evaluate the corrosion resistance of main and auxiliary link forgings under different environmental conditions. The corrosion rate of forgings in different environments and the effectiveness of protective measures can be understood by means of salt spray test and impregnation test.
Service performance evaluation
Functional evaluation: Functional evaluation is to evaluate the actual operation effect of the main and auxiliary connecting rod forging in the main and auxiliary mechanism of the locomotive. Through actual operation or simulation test, check whether the forging can meet the operation requirements and performance indicators of the locomotive, such as transmission efficiency, motion accuracy, etc.
Safety evaluation: Safety evaluation is to evaluate the impact that the main and auxiliary link forging may have on the locomotive and passengers during operation. By analyzing the strength, stability, reliability and other characteristics of the forging, we can judge whether it can ensure the safe operation of the locomotive.
Economic evaluation: Economic evaluation is to evaluate the production cost, maintenance cost and service life of the main and auxiliary connecting rod forgings. By comparing the cost of different materials, processing difficulty, maintenance costs, etc., we can judge the economic benefits and cost performance of forgings.
Environmental adaptability evaluation: Environmental adaptability evaluation is to evaluate the performance of the main and auxiliary connecting rod forgings under different environmental conditions. By evaluating the durability and reliability of forgings in different climate, temperature, humidity and other environmental factors, it can judge its adaptability in various environments.
Maintainability evaluation: The maintainability evaluation is to evaluate the maintenance difficulty of the main and auxiliary connecting rod forging. By evaluating the convenience of disassembly, replacement and cleaning of forgings, the efficiency and cost in the maintenance process can be judged.
To sum up, it is important to test and evaluate the performance of main and auxiliary linkage forgings in the main and auxiliary mechanism of locomotive to ensure the safe, reliable and economic operation of locomotive. Through the comprehensive testing of mechanical properties, fatigue properties, vibration properties, temperature and thermal properties and corrosion resistance of the main and auxiliary connecting rod forgings, combined with the evaluation of functionality, safety, economy, environmental adaptability and maintainability, the service performance of the main and auxiliary connecting rod forgings can be comprehensively evaluated, providing a basis for the optimization design and improvement of the locomotive.
