品牌
经销商厂商性质
上海市所在地
GW6000A4HP/2冬斯DUNGS压力开关
¥2300GW2000A4HP/2 DUNGS冬斯压力开关
¥2300GW2000A4HP GW6000A4HP*压力开关
面议冬斯DUNGS压力开关GW6000A4HP
¥2100GW 2000 A4 HP燃气压力开关冬斯DUNGS
¥2000UB500A4德国冬斯压力开关
¥420UB150A4冬斯DUNGS压力开关
¥410冬斯UB50A4,UB150A4,UB500A4压力开关
¥400DUNGS冬斯压力开关UB50A4
¥400风压开关LGW50A2P,LGW150A2P,LGW3A4
¥210冬斯空气压力开关LGW50A2P LGW3A2 LGW10A2P
¥200压力开关LGW3A2P LGW10A2P LGW150A2P
¥210LGB21.130A27西门子控制器
LGB21.130B27 LGB21.350A27 LGB21.550A27 LGB22.130A27
LGB22.330A27 LGB32.130A27 LGB32.230A27 LGB32.330A27 LGB32.350A27 LGB41.255A27 LGB41.258A27
LGB22.230B2BT LGB22.330A2BT LGB21.130A27
LGB21.230A2BC LGB21.330A2BC
LGB22.230B2BC LGB22.330A2BC
LGB21.230A2EM LGB21.330A2EM LGB22.230B2EM LGB22.330A2EM
LGB21.230A27 LGB21.330A27 LGB21.130A27
LGB22.330A27 LGB21.130A27 LGB21.130A27西门子控制器,引风机的喘振是由于其静叶进出口差压过大而发生。其静叶进出口差压又受其管道阻力影响,相同的引风机的静叶开度管道阻力大时更容易发生喘振,试分析之。
引风机的静叶开度一定时产生相应的风压和流量,当风机产生的压力和流量大于或等于风烟管道的阻力时,风机便能稳定工作不会发生喘振。而风烟管道的阻力增大时,风机出口压力流量克服不了管道系统阻力而发生倒流。烟气倒流使管道阻力降低到风机出口压力时,烟气又顺流出去。烟气如此来回流动称喘振。因此,风烟管道阻力大时引风机会因出力不够时更易发生喘振。