電氣化鐵道技術(shù)接觸網(wǎng)畢業(yè)論文中英文資料外文翻譯文獻(xiàn)-閱讀頁(yè)
2025-02-01 01:53本頁(yè)面
【正文】 the percentage of contact loss occurrence. The equivalent contact resistance is estimated as the ratio between the voltage drop and the imposed current intensity. The equivalent contact resistance takes into account the effective contact resistance due to resistivity and the actual contact area together with the electrical resistance due to arching.CONCLUSIONSThe loss of collector strip and contact wire material has been evaluated in a laboratory test rig simulating the conditions of highspeed trains. Different types of collector strips were tested under working conditions of up to 200 km/h sliding speed and a current transfer of 1000 A . The effect of the content of metallised carbon in the contact strip on the wear of both contact strips and contact wire was investigated.The wear of the contact strips shows a correlation with the total dissipated power divided by the longitudinal dimension of the contact strip. Several wear regions are found depending on the ratio between the content of copper and metallised carbon. This index also points out that Cubased contact strips seem to suffer more from increasing the frictional power. Cbased contact strips seems to be less sensitive to an increase of electrical power due to the Joule effect, correlated to the higher resistivity of the material.The wear of the Cubased collector strips is approximately four times higher than the wear of the allcarbon contact strip. This behaviour requires an ideal smooth surface of the contact wire, which does not cause signi?cant abrasion on the carbon. During a transition phase from an allcopper collector test to an allcarbon collector test, the allcarbon collector might undergo intense abrasive wear. This abrasion is caused by asperities on the wire surface formed when worn against the Cubasedcontact strips.The wear rate of the contact wire reveals two distinct regions when plotted against the total dissipated work per unit length of the contact wire. The Cubased contact strip constitute the high wear region. The lowwear region includes the Cbased contact strips. 附錄2 相關(guān)裝配圖一﹑支柱裝配圖圖11 直線中間支柱支持裝置示意圖 圖12 直線非絕緣轉(zhuǎn)換柱（ZF2）裝配示意圖圖13 曲線區(qū)段的絕緣轉(zhuǎn)換支柱(QJl)裝配示意圖圖14 直線中心支柱（ZJ2）裝配示意圖二﹑定位裝置裝配圖 圖38 圖21 定位裝置形式8
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