YORKYK离心制冷机课件.ppt

培训目标 掌握YK制冷机的制冷循环和油路循环 理解YK机组主要部件的结构、功能和工作原理 均流板 过冷器 冷凝器 * 制冷剂液位传感器 截流元件 * 高速轴承 低速轴承 低速止推轴承 油路润滑 油路润滑 __________________ ________________ __________________ __________ __________ _________ _________ _________ ________________ _________ _________ ______________ ____________ _____________ 低速齿轮 低速齿轮轴承 低速轴轴封 __________________ __________________ ___________ ___________ __________________ ________________ ____________________________ __________________ ____________ ____________ ____________ __________________ __________________ ____________ ____________ ____________ ____________ __________________ 压缩机润滑系统 (YK) 油冷却器 制冷剂出口 制冷剂进口 油过滤器 油槽 油泵吸入口 油泵 视液镜 泄放阀 油加热器 热敏电阻 低速齿轮 轮低速齿轮轴承 低速轴轴封 低速轴轴封盖 低速止推轴承端盖 泄压阀 环形止推轴承 (PRV) 进口叶片 轴承(小齿轮轴承) 高速轴轴封 压缩机转子支撑件 紧急储油罐 高压传感器 止推轴承套圈 高速止推轴承轴封盖 压缩机润滑系统 (YK) 回油系统 回油系统 Questions?? 油气混合物返回压缩机 气体膨胀产生低压区域 高压气体 制冷剂和油的混合物 来自冷凝器 至压缩机 来自冷却器 回油喷射器 YK 离心制冷机规格 YK 离心制冷机规格 YK 离心制冷机规格 问题或意见? 请随意提问! * * * * * * * * * * * * * * Proximity probes have been used by York for many years on multi-stage equipment, but have only been fitting them to the YK single stage centrifugal compressors for the past several years. Their primary function in the YK is to measure the position of the high speed thrust collar and to measure the oil temperature in the thrust bearing cavity. The probe works similar to a radar device as it emits a signal and determines from the emitted signal how far away its target is. Its target in this case is the steel thrust collar reverse face. When the compressor thrust bearing assembly is new, the probe is adjusted and locked in position so that a “known” or calibrated distance exists between its tip and the reverse face of the thrust collar. Should the thrust load increase such that the collar wears away the thrust bearing material, the thrust collar will move away from the tip of the probe. The probe output voltage will change as a result of this change in gap and the micro panel will shut the chiller down before expensive damage can occur.