【導(dǎo)讀】XXXXPowerPlant. FiredUnit. EquipmentContract. Attachment. Contents. 1. February2020. 1General

　　

【正文】 2020 XXXX Power Plant 4 1000MW Ultrasupercritical Unit Feed Water Pump Turbine Contract Document Volume 3 Technical Specification device acts 110%(+1, 0) (6) Shaft vibration value (twodirectional vibration amplitude) Various shaft vibration value Name of bearing Unit Item 1 bearing (BFPT) 2 bearing (BFPT) Normal value Alarm value Trip value Critical speed value Guaranteed value Equipment performance requirement mm mm mm mm mm Feedwater pump turbine will be mature and advanced, and is of maximum availability design under all operation conditions in . BFPT will be equipped with automatic mechanism of steam source changeover. When main turbine load changes to % main turbine TMCR load (25% TMCR load), it can automatically change over steam source from high pressure to low pressure or from low pressure to high pressure. During changeover, it is allowed that HP and LP steams are simultaneously used as working steam source of feedwater pump turbine. BFPT will be able to meet the requirement that auxiliary steam is directly used to start under various start conditions, . the unit is started by turbine driven feedwater pump other than motor driven feedwater pump. Adaptability of feedwater pump turbine to steam source parameter (1) HP steam source The Permissible initial temperature and pressure change shall meet the requirement of Item of IEC451. (2) LP steam source The Permissible initial temperature and pressure change shall meet the requirement of Item of IEC451. Main stop valve of steam admission will be equipped with permanent corrosion resistant steam filter and temporary startup filter. Effective flowthrough area of the filter will be at least two times the cross sectional area of extraction connection of feedwater pump turbine. Structural design of feedwater pump turbine will allow for acceleration from zero load to rated operation condition, and at the same time, can adapt to rapid start and abrupt load change without monitoring internal and external wall temperature difference and expansion difference of casing. Feedwater pump turbine speed can be remotely controlled, and, within rated speed range from 2850r/min to 6300r/min, feedwater pump turbine can continuously and smoothly operate. Its minimum speed will be able to maintain minimum flow circulation condition of feedwater pump. Design of feedwater pump turbine will consider adverse bination of various loads under various conditions. These loads include internal and external design pressures。 10 February 2020 XXXX Power Plant 4 1000MW Ultrasupercritical Unit Feed Water Pump Turbine Contract Document Volume 3 Technical Specification equipment weight and working medium mass under operation condition or test condition。 additional loads such as insulation, and additional equipment or pipe weight。 load caused by safety valve steam exhaust etc. Unit design (such as rotor, blade, casing, bearing etc) will meet the requirement of abrupt load change and rapid start. Moving blade design will withstand the operation at resonance frequency at the time of normal warming up. Bearing design will prevent occurrence of oil film whipping and be easily taken out for replacement and adjustment without the need of lifting out casing and rotor. On the bearing base, the position and space for site installation of measuring and test devices will be reserved. Unit design will be sufficiently considered to prevent accidental overspeed, fire and abrupt vibration. Sufficient measure shall be considered if cold steam admission, cold water inflow occur. Wet steam in any stage of feedwater pump turbine will be limited to the minimum range and blade will adopt appropriate technology to improve erosion protection. Other parts of feedwater water pump turbine subject to erosion will also be provided with protection measure. Measure will be taken to prevent ablation of blade stellite. Pipes and parts feedwater pump turbine steam seal system and vacuum system will be sized according to 300% of calculated clearance leakage. Feedwater pump turbine will be provided with protection measures to protect atmospheric relief valve against damage due to pressure rise of exhaust casing and condenser. Feedwater pump turbine will be equipped with turning gear and its control system. Turning gear will be automatically engaged or disengaged, and stop operation when feedwater pump turbine has no lube oil. Shaft vibration peak value (horizontal radial and vertical radial) measured on the bearing (not bearing base) will be less than . Noise value measured at the point 1m from housing will not exceed 85dB(A). Submission of technical documents concerning connection (including coupling) between feedwater pump turbine and feedwater pump and shafting issues (. vibration, startup, turning speed, variousstage critical speed etc.). as well as turbine driven feedwater pump unit equipment assembly drawings will be the responsibility of the Seller. Structural requirement/system configuration requirement All pressure parts will be suitable for the operation under specified steam condition and the condition that pressure and temperature reach the most severe state. Rotor and blade Feedwater pump turbine rotor will have residual internal stress thoroughly relieved. Rotor position relative to thrust shoe should be marked so that the position of rotor can be easily determined. Design of blade will be highly efficient and mature to enable blade not to be failed due to resonance under any operation conditions. The Seller will state rotor and blade material and provide rotor weight, center of gravity and rotor moment of inertia. Rotor o