故障一：真空压力表的指针剧烈跳动，泵噪声振动大。
发生汽蚀。
1、吸入管路不密封，有空气渗入
检查吸入管路的各连接处，拧紧螺母或更换已损坏的垫片
2、进口过滤器堵塞或吸入管路有阻碍物
清洗过滤器或消除阻碍物
3、介质粘度太大
提高介质温度，使粘度下降，或更换介质
4、泵转速高
降低转速
5、泵排出回流入油箱内的介质所混入的空气未很好排除，随介质一起吸入泵内
检查油箱内是否有钻许多孔的隔离挡板和挡板是否完好，或对介质升温，使空气易从介质内上浮排离
故障三：螺杆旋转困难，运行时泵内产生不正常的机械摩擦声，甚至发生螺杆"咬死"现象
1、泵内滑动轴承或螺杆螺旋段内的间隙中卡有介质
清除杂质，并检查过滤器是否损坏，必要时修理甚至更换磨损零件
2、螺杆螺旋面已经损坏
更换磨损的螺杆
3、滚动轴承配合松动或已磨损造成主动螺杆和螺杆衬套的同轴度超差或无法正常运转
更换轴承
4、推力轴承磨损
检查进入推力轴承的油路是否被垫片或杂质堵塞，清除或清除进入推力轴承的杂质，更换磨损的推力轴承
5、螺杆衬套与泵体的配合松动或位置发生变动
重新装配，调整好位置
6、联轴器与主动螺杆的同轴度超差
调整好同轴度
SMH卧式三螺杆泵型号(SMH卧式安装、SMS立式安装、SMF法兰式安装、SME插装式安装)(R为右旋，L为左旋)
SMH40R38E6.7W23 SMH40R38U8W23 SMH40R38U12.1W23
SMH40R46E6.7W23 SMH40R46U8W23 SMH40R46U12.1W23
SMH40R54E6.7W23 SMH40R54U8W23 SMH40R54U12.1W23
SMH80R36E6.7W23 SMH80R36U8W23 SMH80R36U12.1W23
SMH80R42E6.7W23 SMH80R42U8W23 SMH80R42U12.1W23
SMH80R46E6.7W23 SMH80R46U8W23 SMH80R46U12.1W23
SMH80R54E6.7W23 SMH80R54U8W23 SMH80R54U12.1W23
SMH120R42E6.7W23 SMH120R42U8W23 SMH120R42U12.1W23
SMH120R46E6.7W23 SMH120R46U8W23 SMH120R46U12.1W23
SMH120R54E6.7W23 SMH120R54U8W23 SMH120R54U12.1W23
SMH210R40E6.7W23 SMH210R40U8W23 SMH210R40U12.1W23
SMH210R46E6.7W23 SMH210R46U8W23 SMH210R46U12.1W23
SMH210R54E6.7W23 SMH210R54U8W23 SMH210R54U12.1W23
SMH280R43E6.7W23 SMH280R43U8W23 SMH280R43U12.1W23
SMH280R46E6.7W23 SMH280R46U8W23 SMH280R46U12.1W23
SMH280R54E6.7W23 SMH280R54U8W23 SMH280R54U12.1W23
SMH440R40E6.7W23 SMH440R40U8W23 SMH440R40U12.1W23
SMH440R42E6.7W23 SMH440R42U8W23 SMH440R42U12.1W23
SMH440R46E6.7W23 SMH440R46U8W23 SMH440R46U12.1W23
SMH440R54E6.7W23 SMH440R54U8W23 SMH440R54U12.1W23
SMH660R40E6.7W23 SMH660R40U8W23 SMH660R40U12.1W23
SMH660R44E6.7W23 SMH660R44U8W23 SMH660R44U12.1W23
SMH660R46E6.7W23 SMH660R46U8W23 SMH660R46U12.1W23
SMH660R51E6.7W23 SMH660R51U8W23 SMH660R51U12.1W23
SMH660R54E6.7W23 SMH660R54U8W23 SMH660R54U12.1W23
SMH940R42E6.7W23 SMH940R42U8W23 SMH940R42U12.1W23
SMH940R46E6.7W23 SMH940R46U8W23 SMH940R46U12.1W23
SMH940R50E6.7W23 SMH940R50U8W23 SMH940R50U12.1W23
SMH940R54E6.7W23 SMH940R54U8W23 SMH940R54U12.1W23
SMH1300R38E6.7W23 SMH1300R38U8W23 SMH1300R38U12.1W23
SMH1300R42E6.7W23 SMH1300R42U8W23 SMH1300R42U12.1W23
SMH1300R46E6.7W23 SMH1300R46U8W23 SMH1300R46U12.1W23
SMH1300R54E6.7W23 SMH1300R54U8W23 SMH1300R54U12.1W23
SMH1700R42E6.7W23 SMH1700R42U8W23 SMH1700R42E6.7W23
SMH1700R46E6.7W23 SMH1700R46U8W23 SMH1700R46E6.7W23
SMH2200R42E6.7W23 SMH2200R42U8W23 SMH2200R42E6.7W23
SMH2200R46E6.7W23 SMH2200R46U8W23 SMH2200R46E6.7W23
SMH2900R40E6.7W23 SMH2900R40U8W23 SMH2900R40E6.7W23
SMH2900R46E6.7W23 SMH2900R46U8W23 SMH2900R46E6.7W23
SMH3600R46E6.7W23 SMH3600R46U8W23 SMH3600R46E6.7W23
SMH5300R46E6.7W23 SMH5300R46U8W23 SMH5300R46E6.7W23