Study On The Characteristics Of The Tank Of Washing Device For Catenary

With the rapid development of China’s modern railway construction, catenary power supply security problems along the railway has become more and more serious. The accident of insulator flashover that causes widespread blackouts appearing from time to time has become a problem of railway transportation. To solve this problem, the majority of Railway Bureau have adopted the manner of mobile hot-line washing to clean the insulators of the overhead lines. According to the requirement of water washing equipment for the catenary insulator, this paper has analysed the large tank which mounted on the equipment. During the process of transportation, unexpected events, the complex track or subgrade may cause tank liquid sloshing. When serious, it will affect the stability and tank’s structure safety, so ralated research has important engineering value.The object of this study is a moving horizontal storage tank, its effective volume is 40 cubic meters. The main contents are as follows:(1) The three-dimensional model simplified of a ratio of 1:1 is constructed by Solidworks. By using VOF Multiphase flow model of computational fluid dynamics software Fluent carries out the fluid sloshing in tank:using UDF program does the transient simulation of the braking and curves turning; by extracting the force of front head or side walls and liquid mass center displacement to reflect liquid sloshing of the different cross-sectional area of tank, braking speeds, centrifugal acceleration and water content K to make the foundation of inhibiting the fluid sloshing with baffles. At end calculating the calculation of the derailment coefficient and the rate of wheel load reduction to evaluate the resisting derailment stability of curves driving.(2) By analysis the the fluid sloshing for K=0.85 analysed by (1), it is found that the influence of sloshing and the peak force of front head is relative large. So through simulating fluid sloshing with different number, areas, installation position and shapes of baffles (bow, open-celled, ring type, vertical bar type) it will get the the more reasonable parameters of baffles that can effectively inhibit the fluid sloshing; Finally analysing the result of four different forms of baffles at different water content K to verify the wave suppression effect.(3) By using pressure method and fluid structure interface method checks the intensity of tank respectively under the emergency of braking and curves turning and handles the stress linearization of typical positation. Comparing the simulation results of the two methods, it is found that the total stress intensity of tank is lower only by pressure, so it has shortcomings when estimating the structure strength. However, the method of fluid structure interface is calculating sloshing of the fluid field during a period of time, while passing the data of fluid at a certain moment to the structural finite element simulation to get the real stress of solid structure. Finally, doing modal analysis of the tank containing different volumes of water avoids resonance due to the impact caused by track irregularities.