水轮机、蓄能泵和水泵水轮机.修复和性能改进

[中文适用范围]： 本文件涵盖各种尺寸和以下类型的水轮机、蓄能泵和水泵水轮机： - 法兰西斯； - 卡普兰； - 螺旋桨； - 佩尔顿（仅水轮机）； - 灯泡式水轮机。 本文件还简要识别了可能影响或受水轮机、蓄能泵或水泵水轮机改造影响的其他厂房设备。 本文件的目的是协助识别、评估和执行水轮机、蓄能泵和水泵水轮机的改造和性能改进项目。本文件可供业主、顾问和供应商用于定义： - 改造和性能改进的需求与经济性； - 工作范围； - 技术规范； - 结果评估。 本文件旨在： - 作为决策过程的辅助工具； - 提供关于改造的广泛信息来源； - 识别改造过程中的关键里程碑； - 识别决策过程中需要解决的问题。 本文件不打算作为详细的工程手册或维护文件。 [外文原描述]： IEC 62256:2017 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 62256:2017 covers turbines, storage pumps and pump-turbines of all sizes and of the following types: Francis; Kaplan; propeller; Pelton (turbines only) and bulb turbines. This document also identifies without detailed discussion, other powerhouse equipment that could affect or be affected by a turbine, storage pump, or pump-turbine rehabilitation. The object of this document is to assist in identifying, evaluating and executing rehabilitation and performance improvement projects for hydraulic turbines, storage pumps and pump-turbines. This document can be used by owners, consultants, and suppliers to define: needs and economics for rehabilitation and performance improvement; scope of work; specifications and evaluation of results. This document is intended to be: an aid in the decision process; an extensive source of information on rehabilitation; an identification of the key milestones in the rehabilitation process; and identification of the points to be addressed in the decision processes. This document is not intended to be a detailed engineering manual nor a maintenance document. This second edition cancels and replaces the first edition published in 2008. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: Tables 2 to 23 modified, completed and moved to Annex A; 7.3.2: subclauses moved with text changes; new subclauses on temperature, noise, galvanic corrosion, galling and replacement of components without assessment; 7.3.3: complete new subclause on residual life; Tables 29 to 32 moved to Annex C; New Annex B with assessment examples. Key words: Turbines, Storage pump, Pump turbines, Rehabilitation, Performance.