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武汉履带吊出租管家婆精选资料八码中特 > 吊车百科 > 吊车起重机的液压系统之二,回转机构
吊车起重机的液压系统之二,回转机构
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管家婆精选资料八码中特HUBEIWUHANLVDAIDIAOCHUZUGONGSI

时间 : 2019-03-20 08:24 浏览量 : 151

吊车起重机的液压系统之二,回转机构

    回转机构是流动式起重机管家婆精选资料八码中特中必不可少的机构,它能使整个回转平台在回转支承装置上作360°的回转。

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    回转机构的制动装置应保证突然制动时所产生的制动惯性力不致使起重机有剧烈的震动,因而其制动力矩不宜过大。

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最基本的回转机构液压回路,机构的启动、制动及调速均依赖于手动换向阀的节流作用。常闭式制动器管家婆精选资料八码中特由梭阀经单向节流阀流过来的压力油开启。梭阀的作用,是将马达两个油口中压力较高的一个与单向节流阀相通,而马达的两个油口之间却不会通过梭阀。


    单向节流阀的安装方向与起升机构中的相反,其作用是使制动器在机构启动时,压力油很快通过单向节流阀中的单向阀开启;而在机构制动过程中,制动器的弹簧上闸时,从制动器中排出的油必须经过单向节流阀,从而使制动器上闸较慢以免产生大的冲击。但在换向阀的动作较快时,机构启动、制动的冲击还是很大的。

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