推荐回答(1个)
直-8的传动平台位于机身上部,上面装有发动机、主减速器、传动轴、操纵线系及液压系统,平台外部装有耐热蜂窝板结构的整流罩。发动机前部是进气道,进气道有热气防冰装置。水动流线型船体位于机身下部,船体是水密铆接,为隔板形结构,船体内有3组8个燃油箱。
直-8的水平安定面安装在尾梁的右侧,与尾桨相对,形状为梯形,以三点连接在斜梁上,其安装角可调,相对水平基准线有-5度安装角,水平安定面的面积为1.80米2。
直-8的着陆、着水装置由起落架、尾撑和水陆两用短翼浮筒构成。在降落、滑行和停机时可保证直升机的稳定性。前起落架可以转向,并装有定向锁机构和防摆振装置。前、主起落架都装有双腔空气液压缓冲器,各缓冲器下装有规格相同的两个机轮,机轮为低压轮胎。主起落架机轮上装有液压操纵的盘式刹车装置。尾撑用于在着陆时保护尾梁,安装在尾梁下部 。 直-8的操纵系统为双驾驶复式系统。双驾驶操纵装置由主桨操纵线系和尾桨操纵线系组成。主桨操纵线系借助于双腔双体助力器,控制桨叶的总距和周期变距,从而提供飞机姿态和高度控制。尾桨操纵线系通过双腔双体助力器操纵尾桨提供航向操纵,反馈系统之一失灵也能工作。这些助力器分别由独立的液压系统供油。旋翼刹车操纵系统可保证旋翼转速低于90转/分时,将旋翼有效地刹住,并保证在飞行中不因驾驶员的错误操纵将旋翼刹住而导致飞行事故。当3台或2台发动机工作时,用功率杆装置可使旋翼转速在全部飞行中保持正常。飞行速度小于157.5千米/小时, 转速为207转/分;飞行速度大于157.5千米/小时,转速为212转/分;当1台发动机出现故障时,该装置自动地使其他2台发动机达到连续飞行所需的功率。
直-8装有两套独立的主液压系统,即左、右主液压系统,工作压力为180±5千克力/厘米2,各有1个额定流量为21升/分的增压泵。此外,还装有一套辅助液压系统和一套应急液压系统,工作压力为115~140千克力/厘米2, 各有1个流量为6升/分的电动泵,保证自动驾驶仪、伺服装置、机轮和旋翼刹车装置、救生绞车和尾舱门的工作。机上左右两个容积为8.9升的液压油箱供给以上4套液压系统的用油。当外界大气温度为0℃时,通风加温系统可保证客舱内维持20℃,驾驶舱15℃;当外界大气温度为-30℃时,客舱和驾驶舱均可维持0℃。热空气引自发动机压气机 。 直-8的仪表设备由HZX-1航向姿态系统、大气数据计算系统、发动机仪表、其他辅助仪表、信号显示及告警装置等组成。仪表设备能在昼夜和各种复杂气象条件下,以及在直升机飞行包线内显示飞行航向、飞行姿态、飞行速度、驾驶情况及发动机和各系统工作情况。该机还装有一套KT-8A四通自动驾驶仪,以控制飞行姿态的稳定。
直-8的通信设备包括53号机内通话器,506型甚高频双频段电台和TDT-1型短波单边带电台。该机导航设备包括WL-7无线电罗盘、264无线电高度表和XS-6信标接收机。
直-8的电源有两个发电系统,即交流直流混合供电系统:28.5伏直流发电系统,由3台9千瓦起动发电机供电;115/200伏、400赫兹的三相交流发电系统,由1台9千伏安的交流发电机和1台2 . 7千伏安的变流机供电。为适应夜间航行,飞机上有亮度可调的照明系统, 除环境照明、红光仪表照明外,还在外部装有航灯行、编队灯、防撞灯和着陆灯等。
直-8的防火系统由3个独立的系统组成,分别用于保护3个发动机舱。每个系统都有一套火警探测系统和一个灭火系统 。

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