SPEM高压筒式锅炉给水泵介绍

Static Seals
静密封
Advantage • low gasket seating load required • fully confined gasket • metal to metal face
优点 较小的密封垫预紧力 全内置的密封垫 金属对金属表面接触
Pure Graphite Seal Rings • up to 1000 bar • up to 300 °C 纯石墨密封圈 • 最高压力 1000 bar • 最高温度 300 °C
Pressure Retaining Parts Design
压力部件设计
Analysed with proven codes: • German vessel code AD, standard • ASME section VIII, Division 1, option • FE for selected cases 成熟可靠的设计准则: • 德国压力容器设计准则 AD，（标准） • ASME section VIII, Division 1, （可选） • 有限元分析
FE model
有限元模型
Advantage • proven codes provide high reliability • hydro test (1.5 x or 1.3 x pD) of each pressure casing provides high safety 优点： • 成熟的设计准则保证高可靠性 • 1.5或1.3倍工作压力的水压试验确保高安全性
Higher Efficiency 高效率的给水泵
Function of increased labyrinth gaps for different specific speed 不同比转速下泵内部间隙与效率的关系 效率 降低
Drop in Efficiency Delta eta %
0
-5
nq 33 nq 26 nq 22
Mechanical Seals 机械密封冷却
Air- filled gaps 空气间隔
Cooling water 冷却水
Seal circulation 循环密封水
Shaft Seal With Fixed Throttled Bushing, Option
迷宫密封
Advantage Cold condensate injection 冷凝水入口
扬程最高可达 3,950 m
2500
2000 1800
RUNNING SPEEDS UP TO 8,000 RPM
最高运行速度可达 8,000 r/min
1400 Q in m3/h
1200 300 500 1000 1500 2000 2500 30003500
OPERATING EMPERATURES TO 230 Deg C.
运行温度可达 230℃
SPEM Pumps – Boiler Feed Pumps
上电修 – 锅炉给水泵
SPEM pumps
-extended operating range to meet market needs -improved efficiency -high availability improved materials for better life improved rotor-dynamics and lower vibration -easier to maintain
Shanghai Power Equipment Manufacture Factory (Main) Co., Ltd.
PRODUCTS FOR THE POWER MARKET
力 发 火 火 力 发
锅炉
电
厂 电 厂
锅炉强制循环泵
燃油供给/传输/前置泵 除氧器
高 加
低 加
发电机 汽机 冷却塔
冷凝器 高加疏水泵 锅炉给水泵 低加疏水泵 循环水泵
优点 精密铸造的叶轮和导叶 • 高效率 • 较小的液力不平衡 厚实的叶轮盖板 • 高强度适应高压头 • 自振频率远离激振频率避免叶轮开裂 连续流道的导叶 • 高效率
Rotor Design
转子设计
Shrunk on coupling, oil press fit, parallel stepped or taper fit 油压套装式联轴器
Bleed-off for high suction pressures, without bleed-off for low suction pressures 高吸入压力时排出； 低吸入压力时无排出
推荐检修磨损量
100
100 %
150
200
250
Balance Return Line
平衡鼓泄漏回路
Minimum flow line Deaerator 除氧器 最小流量回路
Booster pump 前置泵
Boiler feed pump
给水泵
Pressure 压力
High
Balance Return Line 平衡鼓泄漏回路
-10
-15
Normal operating range
正常
Danger 危险
Forbidden range Max.Operating Limit Worn 最大运行极限磨损量
禁止
New
500 300
泄漏 间隙 Leakage % Labyrinth gap
Recommended Overhaul Worn
Low
PDI
Main Design Features of Boiler Feed Pumps
锅炉给水泵主要设计特点
Nozzles accepting high loads 牢固的出水口可承受较高的负荷 Full pull out cartridge for rapid changeover 整抽式芯包，更换方便 快速 Bolted delivery cover with metal to metal location for optimum alignment of bearing housing 螺栓连接的出口端盖精确 定位，利于轴承室的对正
Cavitation studies 汽蚀性能研究
EPRI Research Order RP 1884-10 Hydraulic studies 水力性能研究
Input in current design 应用于现代设计
Rotor dynΒιβλιοθήκη Baidumics 转子动力学研究
System interaction 系统影响
上电修泵结合扩压器及涡壳技术，采用筒式 结构，广泛应用于电力、石油和天然气，以 及化工领域
boiler feed water pump for Fossil Power Generation
火电厂用锅炉给水泵
Boiler Feed Pump
EPRI Research Order 锅炉给水泵 EPRI 研究成果的应用
冷却水池
水塔补充泵 凝结水泵
补充泵
前置泵 辅助循环水泵
水源
SPEM Pumps – Boiler Feed Pumps DESIGN DUTY 使 用 范 围
4000 3500 3000
• • •
FLOWS UP TO 3,000 Cu M/Hr
流量最大可达 3,000 m3/h
HEADS UP TO 3,950 m
Cooling jacket 冷却套
Thermosleeve with air gap 带气隙的隔热套
优点 机械密封 • 较高的泵效率 空气隙和隔热套 • 热侧和冷侧隔开，减少热分层 • 避免了由于冷热不均而引起的热分层 冷却套 • 静态时保持密封冷却
Hot (~180°C) 热侧
cool (~60°C) 冷侧
Design Options 可选设计
Mechanical Seal with Integral Cooler 带内置冷却器的机械密封
Fixed Throttle Bush 迷宫密封
Kicker Stage 增压级
Double Suction Impeller 双吸叶轮
Intermediate Take Off 中间抽头
Intermediate Take-off
中间抽头
Intermediate take-off from 1st or 2nd stage, standard from 3rd stage, Possible
第一级或第二级出口的中间抽 头 （标准） 第三级出口的中间抽头也是可 以的
Advantage high flexiblilty of design 优点： 设计的高灵活性
Impeller and Diffuser Design
叶轮和导叶设计
Advantage
Precision castings 精密铸造的叶轮和导叶 Thick shrouds 厚实的叶轮盖板
Continuous channel diffuser 连续流道的导叶
Precision castings • high efficiency • small hydraulic unbalance Thick shrouds • high strength for high head • natural frequency away from resonance thus avoiding shroud breakage •Continuous channel diffuser • high efficiency
Shrunk on balance drum, oil press fit 油压套装式平衡鼓
Shrunk on thrust collar, oil press fit 油压套装式推力盘
Shrink disk for mechanical seal sleeve 机械密封套筒用紧缩环
Impellers are shrunk on, have keys for torque transmission and use split ring for thrust loading 套装叶轮，用键传递扭矩，中分卡环承受轴向负荷
Shaft Seal With Single Mechanical Seal
机械密封
Air barrier 空气间隔
Mechanical seal 机械密封
Advantage Mechanical seal • high pump efficiency Air barrier and thermo sleeve • Insulates hot and cool area thus reduces thermal stratification • avoids shaft bending due to thermal stratification Cooling jacket • keeps elastomer seals cool during stand-still
Forged barrel casing to accept thermal shocks and transient conditions 锻造筒体可承受热冲击和 瞬间变化
Guide key and centre line pump feet ensure hot alignment 导向键和中心线支撑确保泵受热状态下的对中
上电修给水泵主要特点:
规格齐全, 满足各种需要 效率高 可靠性高 －选用优质材料, 适于长期运行 －运行稳定性好 易于维护
Multistage Barrel Pumps
多级筒式泵
SPEM Pumps leads the way in barrel design using diffuser as well as volute technology for Power, Oil & Gas and HPI applications.
Advantage • shrunk on parts allow for high rotor balancing quality • shrunk on parts avoid fretting corrosion and minimize stress concentrations • shrunk on parts avoid loose parts on shaft during operation and result in lower vibration 优点 • 套装部件可保证较高的转子平衡质量 • 套装部件可避免腐蚀，最大程度地减小应力集中 • 套装部件可避免轴上部件运行时松动，转子振动较小