急呀，帮忙用英文翻译以下内容，做好加50分

来源：百度知道 编辑：UC知道 时间：2024/05/29 10:25:14
此款蒸汽背压式汽轮机是由广州市广重企业集团有限公司生产制造，型号是Tpg000189。设计理论和安装工艺与同类型的机组存在有些不同。它可以用来拖动各类压缩机、水泵、风机及发电机。主要部分是由前后气缸组成。后缸是排气缸，后汽缸由上、下二部分组成，均由ZG20CrMo铸钢整体浇注而成。前后汽缸用螺栓及电焊联接成一体。汽缸的结构形状及其支承定位方法都经过精心设计，使在温度变化时能自由和对称地移动，从而使其变形的可能性减至最小。由于是双向流动，蒸汽在中央流入，分别流向各端，然后再向下流过排汽口，进入凝汽器，汽轮机排出的背压蒸汽经管道引向热用户，供给工艺流程所需蒸汽。
本文着重介绍汽轮机后气缸的加工工艺流程，在保证计算准确性的同时需做好工艺的程序，对工程实践有一定的指导意义，工艺流程设计配合得当，对生产这种汽轮机起主导作用。

关键词 汽轮机 气缸 加工 工艺流程 设计

This counter-pressure steam turbine by the Guangzhou City Enterprises Holdings Limited re-manufacturing, model is Tpg000189. Design and installation of technology and the same types of units exist some different. It can be used to drag the various types of compressors, pumps, air-compressors and generators. Before and after the main part of the cylinder is composed. After the tank is ranked cylinder, after the cylinder from the upper and lower two-part, by ZG20CrMo pouring from the whole cast steel. Before and after the cylinder connected with bolts and welding electrodes into one. The structure and shape of the cylinder supporting positioning methods have been carefully designed so that changes in temperature can move freely and symmetrical, making them the possibility to minimize deformation. As a two-way flow of steam in the central inflow, flow of each end, respectively, and then the exhaust steam to the obscene mouth, into the condenser, the back-pressure steam turbine from the