Ⅰ 什么是风机的喘振
当风机发生喘振时，风机的流量周期性的反复，并在很大范围内变化，表现为零甚至出现负值。风机流量的这种正负剧烈的波动，就像哮喘病人呼吸一样。由于流且波动很大而发生气流的猛烈撞击，使风机本身产生剧烈振动．同时风机工作的噪声加。大容量的高压头风机产生喘振时的危害很大，可能导致设备和轴承的损坏、造成事故．直接影响了锅炉的安全运行。为了防止风机的不稳定性，可采取如下措施： (1)保持风机在稳定区域工作。因此，管路中应选择p-Q特性曲线没有驼峰的风机；如果风机的性能曲线有驼峰，应使风机—直保持在稳定区(即p-Q曲线下降段)工作。 (2)采用再循环。使一部分排出的气体再引回风机入口，不使风机流量过小而处于不稳定区工作。 (3)加装放气阀。当输送流量小于或接近喘振的临界流量时，开启放气阀、放掉部分气体，降低管系压力，避免端振。
Ⅱ 谁能告诉我有关各种阀门的英语翻译！！！
你要的基本上都有了，各种阀的名称、部件，相关用语。
如果你要各种阀门的解释，到这里
http://valve-2000.nease.net/shuyu.htm
CQ螺纹球阀 CQ Thread Ball Valves
L形三通式 L-pattern three way
T形三通式 T-pattern three way
安全阀 Safety valve
暗杆闸阀 Inside screw nonrising stem type gate valve
百叶窗; 闸板 shutter
百叶窗式挡板 louver damper
摆阀式活塞泵 swing gate piston pump
保温式 Steam jacket type
报警阀 alarm valve
报警阀; 信号阀; 脉冲阀 sentinel valve
背压调节阀 back pressure regulating valve
背压率 Rate of back pressure
本体阀杆密封 body stem seal
波纹管阀 Bellows valves
波纹管密封阀 bellow sealed valve
波纹管密封式 Bellows seal type
波纹管平衡式安全阀 Bellows seal balance safety valve
波纹管式减压阀 Bellows recing valve
波纹管式减压阀 Bellows weal recing valve
薄膜 thin film
薄膜; 隔膜 diaphragm
薄膜式减压阀 Diaphragm recing valve
薄型闸阀 Thin Gate Valves
不封闭式 Unseal type
槽车球阀 Tank Lorry Ball Valves
颤振 Flutter
常闭式 Normally closed type
常开式 Normally open type
超低温阀门 Cryogenic valve
超高压阀门 Super high pressure valve
超过压力 Overpressure of a safety valve
衬胶隔膜阀 rubber lined diaphragm
衬胶截止阀 rubber lined globe valve
垂直板式蝶阀 Vertical disc type butterfly valve
磁耦合截止阀 Magnetic Co-operate Globe Valves
带补充载荷的安全阀 Supplementary loaded safety valve
带辅助装置的安全阀 Assisted safety valve
单阀碟双面平行密封闸阀 parallel single disk gate valve
单口排气阀 Single Opening Exhaust Valves
单向阀 Non-return Valve
单闸板 Single gate disc
单闸板平板闸阀 Single Disc Flat Gate Valves
弹簧薄膜式减压阀 Spring diaphragm recing valve
弹簧式安全阀 Direct spring loaded safety valve
弹簧座 Spring plate
弹性闸板 Flexible gate disc
当量计算排量 Equivalent calculated capacity
挡板 damper
导阀 Pilot valve
导向套 Valve guide disc guide
低温阀门 Sub-zero valve
低压阀门 Low pressure valve
底阀 bottom valve
底阀 Foot valve
电磁动装置 Eletro magnetic actuator
电磁阀 magnetic valve
电磁阀 solenoid valve
电磁－液动装置 Eletro magnetichydraulic actuator
电动阀 mortor operated valve
电动阀 motorized valve
电动截止阀 Electric Actuated Stop Valves
电动平行式双闸板闸板 Electric Double Disk Parallel Gate Valves
电动楔式闸阀 Electric Actuated Wedge Gate Valves
电动装置 Electric actuator
电－液动装置 Eletro hydraulic actuator
电液伺服阀 electro-hydraulic servovalve
调节弹簧 Regulation spring
调节阀 adjusting valve
调节阀 control valve
调节阀 regulating valve
调节螺套 Adjusting bolt Adjusting screw
调节圈 Adjusting ring
蝶板 Disc
蝶阀；瓣阀 butterfly valve
蝶阀；瓣阀；拍门；铰链阀 flap valve
蝶式缓冲止回阀 Butterfly Type Non-slam Check
蝶式止回阀 Butterfly swing check valve
定比减压阀 Proprutioning pressure recing valve
定差减压阀 Fixed differential recing valve
定值减压阀 Fixed pressure recing valve
动态特性 Dynamic characteristics
对焊连接阀 Buttwelding valves
对夹蝶板阀 Wafer plate valves
对夹式衬胶蝶阀 Wafer Type Butterfly Valves with Rubber Itning
对夹式阀门 Clamp valves
对夹式止回阀 Wafer Check Valves
额定排量 Certified capacity
额定排量系数 Derated coefficient of discharge
二通阀 Two-way valves
阀 valve
阀板 valve deck plate
阀板 valve plate
阀板式活塞泵 valve deck plate type piston pump
阀板式活塞泵 valve plate type piston pump
阀瓣 Disc
阀操纵杆 valve operating rod
阀痤槽 valve seat recess
阀挡 valve grid
阀挡 valve positioner
阀挡 valve stop
阀导杆 valve tail rod
阀导向器 valve guide
阀盖 bonnet
阀盖衬套 bonnet bush
阀盖垫片 bonnet gasket
阀杆 stem
阀杆 valve rod
阀杆 valve spindle
阀杆端部尺寸 Dimmension of valve stem end
阀杆环 stem ring
阀杆螺母 Yoke bushing Yoke nut
阀杆填料 stem packing
阀杆头部尺寸 Dimension of valve stem head
阀簧 valve spring
阀簧压板 valve spring plate
阀控水锤泵 valve-controlled hydraulic ram
阀框架 valve yoke
阀门 Valve
阀门传动装置 valve bandle set
阀门和管件 Valves and Fittings
阀门盘根 valve packing
阀门手柄 valve handle
阀盘 disc
阀盘 valve disc
阀片 Disc
阀球 valve ball
阀驱动臂 valve driving arm
阀驱动臂 valve motion arm
阀式活塞 valve type piston
阀式活塞 valve type bucket
阀室式活塞泵 valve box type piston pump
阀室式活塞泵（美） valve pot type piston pump
阀抬起装置 valve lifting device
阀体 body
阀体 valve body
阀箱 valve box
阀箱 valve cage
阀箱 valve chest
阀箱；阀限位器 valve guard
阀箱盖 cover for valve box
阀箱盖 valve box cover
阀箱式活塞泵（美） turret type piston pump
阀形活塞泵 valve type piston pump
阀座 Seat ring
阀座 valve carrier
阀座 valve seat(body seat)
阀座；阀盘 valve seat
阀座环 seat ring
阀座密封嵌条 sealing strip for valve seat
法兰 flange
法兰堵头 blind flange
法兰端 flange end
法兰接头 flange joint
法兰连接紧固件（双头螺栓和螺帽） flange bolting
法兰密封面，法兰面 flange facing
法兰面加工 flange facing finish
法兰球阀 Flange Ball Valves
翻板阀 Flap
反冲盘 Disc holder
反向作用式减压阀 Reverse acting recing valve
反向作用式减压阀 Reverse acting recing valve
放空阀 emptying valve
放气阀 air vent valve;vent valve
放气阀；排气阀 air evacuation valve
放泄阀 escape valve
分置阀室式活塞泵 separate valve box type piston pump
分置阀室式活塞泵（美） side pot type piston pump
封闭式 Seal type
浮动式球阀 Float ball valve
浮球 Ball float
浮球阀 Float Valve
浮球式疏水阀 Ball float steam trap
浮球式疏水阀 Free Float Type Steam Trap
浮桶 Bucket float
浮桶式疏水阀 Open bucket steam trap
辅助（副）阀 Auxiliary valves
负荷率 Rate of load condensate
附加背压力 Superimposed back pressure
复位弹簧 Returnning spring
杠杆式 Lever type
杠杆式安全阀 Lever and weight loaded safety valve
杠杆式减压阀 Lever recing valve
高温阀门 High temperature valve
高压阀门 High pressure valve
格兰密封 gland
隔离阀 isolating valve
隔膜 Diaphragm
隔膜阀 diaphragm valve
隔膜式控制阀 diaphragm operated comtrol valve
工作背压 Operating back pressure
工作温度 Operating temperature
工作温度 Working temperature
工作压差 Operting differential pressure
工作压力 Operating pressure
工作压力 Working pressure
公称通径 Nominal diameter
公称压力 Nominal pressure
固定式球阀 Fixed ball valve
关闭压力 Lockup pressure
关阀过冷度 Subcooled temperature of close valve
关阀温度 Closing valve temperature
管道安全阀 Piping Safety Valves
过冷度 Subcoold temperature
过流阀(或节流阀) Restrictor Valves
喉径 Throat diameter
滑阀 slide valve
滑阀式回转活塞泵 rotary piston pump with slide gate
滑阀型转子泵 eccentric rotary pump with sliding sleeve
环形阀 annular valve
环形阀 double beat valve
换向阀 selector valve
换向阀 shuttle valve
回转滑阀活塞泵 piston pump with rotary gate
回座压力 Re-seating pressure of a safety valve
活塞昵减压阀 Piston recing valve
活塞式阀 piston valve
活塞式阀；柱塞式阀 plunger valve
活塞式减压阀 Piston recing valve
减速阀 Deceleration valves
减压比 Pressure recing ratio
减压阀 pressure recing valve
浆液阀 Parallel Slide Valves
角阀 Angle Valve
角阀 isolation valve angle configuration
角式 Angie type
角式节流阀 Angle Throttle Valves
角式截止阀 Angle Stop valves
铰链阀；片状阀 flapper valve
节流阀 throttle valve
节流阀 choke valve
节流阀；节流 throttle
结构长度 Face-to-face dimension ;End-to-end dimension; Face-to-centre dimension
结构形式 Type of construction
截止阀 Globe valve
截止阀 Shut-off Valve
截止阀；关断阀 shut-off valve
截止式隔膜阀 Globe diaphragm valve
紧急切断阀 Emergeny Cut-off Valves
进气阀 air intake valve
进水阀；进口阀门 inlet valve
静态特性 Static characteristics
静态特性偏差 Static characteristics derivation
开阀过冷度 Subcooled temperature of open valve
开阀温度 Opening valve temperature
开启高度 Lift
壳体试验 Shell test
壳体试验压力 Seal test pressure
空气阀门 Air valves
快速排污阀 Quick Draining Valves
类型 Type
冷凝结水排量 Cold condensate capacity
冷态试验差压力 Cold differential test pressure
理论排量 Theoretical flowing capacity
连接槽尺寸 Dimension of connecting channel
连接尺寸 Conncetion cimension
连接形式 Type of connection
帘面积 Curtain area
流道面积 Flow area
流道直径 Flow diameter
流量孔板 flow orifice plate
流量控制阀 flow control valve
流量特性 Flow characteristics
流量特性偏差 Flow characteristics derivation
漏汽量 Steam loss
脉冲式疏水阀 Impulse steam trap
密封面 Sealing face
密封试验 Seal test
密封试验压力 Seal test pressure
明杆平行式双闸板闸板 Double Disk Parallel Gate Valves
明杆闸阀 Outside screw stem rising through handwheel type gate valve
膜片 Diaphragm
内压自封 Pressure seat
逆止阀；止回阀 check valve
逆止阀；止回阀 non-return valve
逆止阀;止回阀;单向阀 check valve
排放背压力 Brilt-up back pressure
排放压力 Relieving pressure
排灰阀 Ash valves
排量系数 Coefficient of discharge
排气阀 air release valve
排气阀 Exhaust valves
排气阀 Vent Valve
排水阀 Drainage valves
排水温度 Temperature at discharging condensate
排污阀 blowdown valve
排污箱(阀) Waste Valves
排渣闸阀 Scum Gate Valves
盘阀 moushroom valve
盘状阀 plate valve
旁路阀 by pass valve
配汽活塞阀缸套 piston valve line
喷射阀 injection valve
喷射阀 sprayer valve
喷水阀 spray water valve
频跳 Chatter
平衡阀 Balance valves
平衡式 Balance type
平行式闸阀 Parallel gate valve Parallel slide valve
启闭件 Disc
启闭压差 Blowdown of a safety valve
起始升程 Commencement of lift
气动装置 Pneumatic actuator
气阀摇臂 valve arm
气－液动装置 Pneumatic-hydraulic actuator
潜水电泵(排污泵) Submerged Motor Pumps
切断阀;截止阀 block valve;shut-off valve;stop valve
切断式止回阀 stop check valve
切换阀;多向阀 changeover valve
球、球芯 Ball
球阀 Ball valve
球阀 globe valve
球体 Ball
全启式安全阀 Fall lift safety valve
热凝结水排量 Hot condensate capacity
入口隔离门 suction isolating valve
塞子 Plug
三通阀 three-way isolating valve
三通阀 three-way valve
三通式 Three way type
上密封 Back seat
上密封试验 Back seal test
渗漏量 Leckage
升降立式止回阀 Vertical lift check valve
升降式止回阀 Lift check valve
适用介质 Suitable medium
适用温度 Suitable temperature
手摇油泵(阀) Manual Oil Pumps Valves
疏水阀 drain valve
双金属片式疏水阀 Bimetal elements steam trap
双口排气球 Double Opening Exhaust Valves
双联弹簧式安全阀 Duplex safety valve
双闸板 Double gate disc
双闸板平板闸阀 Double Disc Flat Gate Valves
水封闸阀 Water Seal Gate Valves
水力喷射器(真空泵) Vacuum Pumps
伺服阀 servovalve
填料 Packing
填料垫 Packing seat
填料函 Stuffing
填料式旋塞阀 Gland packing plug valve
填料箱 Stuffing box
填料压盖 Gland
通气阀 breather valve
通气阀；呼吸器 breather
通用阀门 General valve
吐出阀；排出阀 discharge valve
吐出阀限位器 delivery valve guard
微启式安全阀 Low lift safety valve
微阻缓闭止回阀 Tiny Drag Slow Shut Check Valves
吻合度 Percent of contact area
蜗轮传动蝶阀 Butterfly Valves with Gear Actuator
蜗轮传动装置 Wormgear actuator
屋脊式隔膜阀 Weir diaphragm valve
无阀泵 valveless pump
无阀隔膜泵 valveless diaphragm pump
无阀振动泵 valveless vibration pump
无负荷漏汽量 No-load steam loss
无负荷漏汽率 Rate of no-load steam loss
吸（抽）气阀 Aspirating valves
吸入阀 suction valve
吸入阀限位器 suction valve guard
先导式安全阀 Pilot operated safety valve
先导式液压阀 Pilot-operated recing valve
相对静偏差 Relative static characteristics derivation
相对流量特性偏差 Relative flow characteristics derivation
相对压力特性偏差 Relative pressure characteristics derivation
销轴 Hinge pin
楔式闸阀 Wedge gate valve
斜板式蝶阀 Indined disc butterfly valve
泄料（放空，排污）阀 Blowdown valves
泄压阀 Decompression valves
泄压阀 pressure release valve
泄压阀；安全阀 relief valve
卸荷式减压阀 Balanced recing valve
型号 Type Model
旋启多瓣式止回阀 Multi-disc swing foot valve
旋启式止回阀 Swing check valve
旋启双瓣式底阀 Double disc swing foot valve
旋塞阀 Cock
旋塞阀 plug valve
压力（増压）阀 Pressure valve
压力调节阀；压力控制阀 pressure controlled valve
压力特性 Pressure characteristics
压力特性偏差 Pressure characteristics derivation
压力增长系数 Pressure increasing ratio
摇杆 Arm
液动装置 Hydraulic actuator
液化气管件 LPG Pipe Fitting
液下泵 Under Water Pumps
液压执行器 hydraulic actuator
仪表针形截止阀 Meter Needle Type Globe Valves
溢流阀 overflow valve
翼形阀；锥形阀 wing valve
油封式旋塞阀 Lubricated plug valve
有阀翼板 double acting wing
有阀翼板 wing with valve
有负荷漏汽量 Load steam loss
有负荷漏汽率 Rate of load steam loss
圆板阀；圆盘阀 disc valve
圆盘式疏水阀 Shemostatic team trap
圆柱齿轮传动装置 Cylindrical gear actuator
圆锥齿轮传动装置 Conical gear actuator
闸板 Wedge disc
闸板式隔膜阀 Wedge diaphragm valve
闸阀 gate valve
闸阀 sluice valve
针形阀 Pintle valve ; Needle valve
真空破坏阀 vacuum breaker valve
蒸汽疏水阀 Automatic steam trap Trap
整定压力 Set pressure
正向作用式减压阀 Direct acting recing valve
支架 Yoke
直接载荷式安全阀 Direct loaded safety valve
直接作用式减压阀 Direct-acting recing valve
直流式 Y-globe type
直流式截止阀 Oblique Stop Valve
直通单向阀 inline check valve
直通单向阀 straightway check valve
直通阀 Throughway Valve
止回阀 Check Valve
止回阀；回流阀 reflux valve
制动阀 Brake valves
中压阀门 Middle pressure valve
钟形浮子式疏水阀 Inverted bucket steam trap
钟形罩 Inverted bucket
轴套 Axis Guide
主阀 Main valve
主要外形尺寸 Prime out-form dimensions
主要性能参数 Specifeca tion speeification
注液漏斗阀 Priming Tundish Valve
柱塞阀 Plunger valve
柱塞截止阀 Plunger Globe Valve
柱塞型摆动阀 rocking plunger valve
撞击手轮 Impact handwheel
锥形阀；翼形阀 conical valve
自动循环阀 Automatic Recirculation Valve
组合阀 Combination valves
最大过冷度 Maximum subcoold temperature
最大流量 Maximum flow rate
最大压差 Maximum differential pressure
最低工作压力 Minimum operating pressure
最高背压率 Maximum rate of back pressure
最高工作背压 Maximum operating back pressure
最高工作温度 Maximum operating temperature
最高工作压力 Maximum operating pressure
最高排水温度 Maximum temperature at discharging
最高允许温度 Maximum allwable temperature
最高允许压力 Maximum allowable pressure
最小过冷度 Minimum subcooled temperature
最小压差 Minimum differntial pressure