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                          高速列車分類[2014-09-04]

                          高速列車按動力集中程度可分為動力集中型高速列車和動力分散型高速列車。 [閱讀全文]

                          機車等效干擾電流(equivalentdisturbingcurrentoflocomotive)基波電流、各次諧波電流分量有效值乘以其雜音干擾系數Sn后的均方根電流值。 [閱讀全文]

                          機車功率因數[2013-05-20]

                          電力機車電網側的電壓非常接近正弦波形;而電流則是周期性的非正弦電流,可認為是基波電流與一系列諧波電流之和。只有基波電流與電網電壓同頻率,可以產生有功功率。 [閱讀全文]

                          基波的有功功率與基波的視在功率之比,數學上可以理解為基波電流相對于電壓波形相移角φ的余弦。 [閱讀全文]

                          機車牽引特性中維持機車牽引功率為恒定條件下的速度調節范圍,即從低俗恒功點到高速恒功點的兩個速度限值之間的區域。 [閱讀全文]

                          柴油機振動[2013-04-25]

                          柴油機工作時,由各種周期性作用力所激發的多種形態的震動。 [閱讀全文]

                          柴油機軸承[2013-03-28]

                          承受旋轉軸上載荷的零件。柴油機上主要的承載部位較多地采用滑動軸承,這類軸承一般做成剖分的,剖分后的兩半形似瓦片,故又稱為軸瓦。柴油機上承受載荷最大的是支承曲軸的主軸承和連接曲軸和連桿的連桿軸承。 [閱讀全文]

                          柴油機在高速運轉時由于配氣結構中運動和作用力發生異常變化而導致的強烈震動和噪聲、氣門開閉定時不準、氣門磨損甚至氣門反跳等現象。 [閱讀全文]

                          柴油機的一種安全保護裝置。柴油機突然卸載時,噴油泵的供油減少跟補上負載的減少,或者是柴油機調速器因出現故障而失靈,柴油機的轉速便不斷增加而超過其所允許的最高轉速,如不采取措施,將因轉速過高導致運動件的慣性力劇增,使其受力超過正常范圍而斷裂破損。 [閱讀全文]

                          柴油機熱負荷[2013-02-26]

                          由于高溫導致柴油機零部件的熱負荷。表現在兩方面:(1)高溫零部件材料的極限強度降低了。例如,鋁合金在150℃時的抗拉強度為180MPa~230MPa,當溫度升至250℃時,其抗拉強度降至100MPa~150MPa,溫度再高時,強度還要急劇下降。 [閱讀全文]

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