求一段机械方面英语翻译，谢！！！

来源：百度知道 编辑：UC知道 时间：2024/06/06 05:40:40
随着国民经济的快速发展，建筑结构的的大型化和复杂化对混凝土机械提出了越来越高的要求。具有众多优点和较高经济效益的混凝土泵车得到了普及和应用，混凝土泵车已成为当今建筑施工企业必不可少的专用设备。本文首先介绍了混凝土泵车的结构和特点，重点对混凝土泵车的回转机构和回转液压部分及臂架油缸进行了设计；同时对回转头部件与油缸相连的部件进行了强度校核，并根据泵车零部件标准确定了回转头的主要尺寸及组成部件。回转机构采用液压马达驱动减速器带动回转支承进行旋转，回转头安装在回转支承上随着回转支承转动，从而带动臂架在回转平台上在0~360°范围内转动，臂架展开收拢及其混凝土浇注时定位均是由变幅油缸推（拉）动变幅机构的运动来实现的。
具体内容主要包括：
1．回转机构、回转液压部分的设计,回转支承装置的选型与计算。
2．回旋支承满足上车布料杆（含混凝土总量）的倾翻力矩的计算。
3．回转台的强度校核及臂架油缸设计系统方案可行，能满足泵车性能要求。
本设计的主要特点是：机构简单,节省投资，控制方便。对目前国内的混凝土泵车的优化设计具有一定的参考价值。

关键词：混凝土泵车；回转机构；回旋驱动部分；回旋支承；液压系统

Along with national economy fast development, construction structure the large scale and the complication set more and more high request to the concretes machinery. Has the numerous merits and the high economic efficiency pumpcrete machine vehicle obtained the popularization and the application, the pumpcrete machine vehicle has become constructs the construction enterprise essential special purpose equipment now. This article first introduced the pumpcrete machine vehicle's structure and the characteristic, key have carried on the design to the pumpcrete machine vehicle's swiveling mechanism and the rotation hydraulic pressure part and the prm support cylinder; Meanwhile has carried on the intensity examination to the revolving head part and the cylinder connected part, and has determined revolving head's main dimension and the building block according to the pump vehicle spare part standard. The swiveling mechanism uses the oil motor to actuate the reduction gear to le