The invention discloses a double-fork expansion joint, and belongs to key equipment of urban rail transit for electric locomotive power supply equipment. According to the technical scheme, a section of steel-aluminum composite rail is divided into a left expansion body and a right expansion body through wire cut electrical discharge machining, the left expansion body and the right expansion body are each provided with two fork heads, the left expansion body and the right expansion body are machined and assembled with a current connector and the like to form an expansion joint without a floating block, and the length of each fork head is 1.5 times larger than the maximum gap caused by thermal expansion and cold contraction. And the current collector brush on the electric locomotive can stably pass through the expansion joint. Three power-on paths are arranged from the left expansion body to the right expansion body: 1, directly passing through the two fishplates, 2, passing through the large copper ring, and 3, passing through the small copper ring to the two fishplates and then passing through the other small copper ring. The expansion joint is high in reliability, the longitudinal center distance between the adjacent expansion joints can be increased to 200 m, the overall length of the expansion joint is reduced by one third, the electricity transmission stability is good, 1.1 times of total rated current can pass through the expansion joint, and the initial sliding force is smaller than 800 N.

    一种双叉膨胀接头,属于城市轨道交通对电力机车供电设备的关键器材。本发明的技术方案是将一段钢铝复合轨经电火花线切割分成各带二个叉头的左右膨体,经加工并装配电流连接器等后成为无浮动块的膨胀接头,叉头的长度大于由热胀冷缩导致的最大间隙的1.5倍,确保电力机车上的授流器电刷能平稳通过膨胀接头。左膨体到右膨体有三条通电路径:1、直接经二条鱼尾板,2、经大铜圈,3、经小铜圈至二条鱼尾板再经另一小铜圈。本发明可靠性高,可加大相邻膨胀接头纵向中心距至200米,全长减少三分之一的膨胀接头,传电稳定性好,能通过1.1倍的总额定电流,起始滑动力小于800N。


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    Titel :

    Manufacturing and mounting method of double-fork expansion joint


    Weitere Titelangaben:

    双叉膨胀接头制作和安装方法


    Beteiligte:
    LI LEI (Autor:in)

    Erscheinungsdatum :

    30.08.2022


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    B60M Speiseleitungen oder Vorrichtungen am Gleis für elektrisch angetriebene Fahrzeuge , POWER SUPPLY LINES, OR DEVICES ALONG RAILS, FOR ELECTRICALLY-PROPELLED VEHICLES



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