n 高压汽缸为单层缸隔板套结构，由高压缸前部和高压缸后部两部分组成。前 部由耐热合金ZG20CrMoV浇铸而成，后部由碳钢ZG230～450浇铸而成， 两部分通过垂直法兰用螺栓连接起来，高压缸前部采用高窄法兰，取消法兰 加热装置，有利于机组快速启停。
n The HP casing is single layer blade carrier structure, it consists of the front part and rear part. The front part is forged by heat resistant alloy ZG20CrMoV, the rear part is casted with mild steel ZG230～450. these two parts are connected together through vertical flange with blots, the front part of Ph casing adopts high narrow flange, the heating device should be removed, which is favorable for the shut down and start up of un汽it机w培训it教h材f2ast speed.
n There are four steam chambers in front of casing， which are welded integrally with casing, each air chamber is equipped with a control valve, the individual control valves controls a group of nozzle respectively. A control pedestal of control valve controls the opening of a control valve. After passing through the main stop valve, the fresh steam is introduced into HP control valve by four main steam pipes, the steam entering into HP casing is controlled by control valve. The exhausted steam from HP casing enters into LP casing through two connecting tubes located on the top of casing. The steam entered into LP casing flows forward and backward symmetrically, after expanding to work in the admission passage. The steam will be discharged into exhaust device through diffuser tu汽b机e培训o教f材2LP casing.
n During the start up, shut down and changing of work condition, the temperature changes, the turbine will expand or shrink. In order to ensure that turbine can expand or shrink in the right direction when it is heated or cooled, and the center of casing and that of rotor comply with each other, a set of sliding pin system is established. The sliding pin system consists of transverse pin, longitudinal pin and vertical pin etc, the structure of every sliding pin is as fig. 6—10 show.
汽机培训教材2
转子 (高中压缸转子) rotor (HIP casing rotor)
汽机培训教材2
转子（低压缸转子）rotor (LP casing rotor)
汽机培训教材2
n 高中压转子与低压转子均为整锻结构。高压转
子材料30Cr1Mo1V，低压转子材料 30Cr2Ni4MoV。
frame. between the exterior casing and bearing
pedestal, the vertical pin is set on lower part. The
connecting tube of IP casing and LP casing is
connected with the exterior and interior LP casing by
n 高压缸前部有四个蒸汽室，与汽缸焊成一体，每个蒸汽室内装有 一只调节阀，四个调节阀各自控制着一组喷嘴。每个调节阀由一 个调节阀操纵座控制其开度。新汽通过主汽阀后，由四根主汽管 分别引入四个高压调节阀，由调节阀控制进入高压缸的蒸汽流量。 高压缸排汽通过位于汽缸上方的两根连通管进入低压缸。进入低 压缸的蒸汽对称地向前后两个方向流动，在通流部分膨胀做功之 后，经过低压缸扩压管排入排汽装置。
n Casing is the shell of turbine. Its function is to separate the steam entering into the turbine from atmosphere, forming the sealed steam chamber where the steam energy can be transformed; the components such as diaphragm and blade carrier etc. are installed in the casing, the pipes such as steam admission pipe, exhaust pipe and extraction pipe are connected to the exterior part of casing, therefore, it also plays the role of supporting and positioning.
汽机培训教材2
2020/11/23
汽机培训教材2
喀北电站汽机图片 turbine picture
汽机培训教材2
n 汽机主机的结构概述 n General description of main unit structure n 汽轮机的结构组成： n Composition of steam turbine n 静止部分：包括汽缸、喷嘴、隔板、隔板套、汽封及轴承等部件； n Static parts: including casing, nozzle, diaphragm,
casing is positioned by keys, its two feet is placed on
the supporting surface on the internal side of
exterior casing, exterior casinragm sleeve, gland seal and bearings etc. n 转动部件：包括动叶片及转子（叶轮、主轴）联轴器、汽封等部件； n Rotating parts: including moving blade and rotor (impeller,
main shaft), coupling, gland seal etc. n 附属设备：包括主汽阀、调节汽阀、调节系统、主油泵、辅助油泵及
n 低压缸为双流式，轴承箱落地。该缸为双层，外缸为钢板焊 接，由三段组成，内缸为小段铸件及钢板焊接而成。内缸以 键定位，两脚搁在外缸内侧的支撑面上，外缸支撑在基架上。 外缸与轴承座间在下半设有立键。高低压缸连通管与低压内 外缸靠波纹管相联，满足既能密封又能自由膨胀的要求。
n LP casing is double flow, its bearing box is grounding
润滑装置等。 n Auxiliary equipment: including main steam valve, adjusting
steam valve, adjusting system, main oil pump, auxiliary oil pump and lubricating device etc.
汽机培训教材2
主机的结构概述及性能参数
n 汽缸 casing n 隔板、汽封 diaphragm, gland seal n 轴承 shaft bearing n 转子 rotor n 盘车 turning gear
汽机培训教材2
汽缸、滑销系统
n 汽缸是汽轮机的外壳。其作用是将进入汽轮机的蒸汽与大气隔开，形成蒸汽 能量转换的封闭汽室；汽缸内部安装着隔板和隔板套、汽封等部件，外部与 进汽、排汽及抽汽等管道相连接，因此还起着支承定位的作用。
arranged. This casing is also of too layers, the
exterior casing is welded with steal board, and
composed of three stages, the interior casing is
welded with short casting and steel board. Interior