不锈钢多级潜水泵故障维修方式

　　不锈钢多级潜水泵关键由不锈钢金属复合材料制做、用以潜进水中提取地表水已做到输送物质为目地的泵类，材料有：304不锈钢潜水泵、316不锈钢深水井潜水泵、316L不锈钢潜水泵等，关键运用与自然环境相对来说极端、物质有着一定的刺激性的情况中。不锈钢多级潜水泵在工作中情况下免不了发生一些小问题危害潜水泵的运作，引起一些小问题，差异的常见故障，维修方法也不一样，此文关键汇总了不锈钢多级潜水泵出现异常有什么状况和维修方法及其日常的维修应用事宜。

　　不锈钢多级潜水泵常见问题状况维修方法

　　1、启动困难或无法启动

　　假如盖上电闸开关，熔断丝马上融断或电机只传出嗡嗡响而不转或旋转丽不做到额定转速。都归属于运行层面的常见故障。一般有电气设备和机械设备两方面的因素：

　　电气设备层面：(1)工作电压稍低，电机电动机扭矩不足。主要原因是供配电系统自身工作电压稍低，变压器大小不足或离水泵很远，也有可能是供电系统导线截面过小。(2)开关电源一相断开或一相保险丝熔断，导致电机二相启动。(3)电机转为错误，应将三根火线随意二根开展调接。

　　机械设备层面：(1)启动前未灌预润水或预润水流量不够，需加灌预润水。(2)转动轴与橡胶轴承相互配合不合理，间隙过小。(3)转动轴弯折或叶轮径向间隙没调节适合，造成磨擦或卡死，应开展修补或调节。(4)泵内有脏物卡死叶轮或泵壳和滚动轴承含有沉砂，应立即消除。

　　2、运行后不出水或总流量不大

　　运行后泵旋转，但不出水或总流量小，应该马上关机查验，时长稍长可能会把橡胶轴承烧蚀造成水泵震动。主要原因有：

　　(1)泵壳在水中吞没深层不足或井中水位降低太多，进水管露出水面而吸进气体。

　　(2)水里泥沙和物品把进水口、叶轮或导水壳过流道阻塞，在装泵前务必把泵内或井内脏物清理整洁。

　　(3)叶轮松动、转动轴或泵轴破裂导致轴转叶轮不转动。这种问题是泵壳安装不善或径向间隙调整过多产生的。

　　(4)出水口破裂、脱口，造成很多渗水，导致水流量减少或不出水。

　　3、深井泵运行时产生剧烈震动

　　(1)启动时产生震动有可能是没加预润水或添加水流量不够，应该马上关机充注预润水，以防出现干磨擦使橡胶轴承持续高温后抱轴。

　　(2)转动轴径向间隙过小，使叶轮和导水壳造成机械设备磨擦和撞击，造成震动，应该马上关机查验。

　　(3)转动轴弯折或橡胶轴承过多损坏，丧失支撑功效，使转动轴晃动，应检测转动轴并开展调直。

　　(4)井管不竖直，将转动轴和供水管道挤弯造成震动，应卸掉深井泵矫直井管。

　　4、深井泵运作情况下输出功率扩大

　　如果发现配电箱上电流计或功率因数表读值忽然**，表明深井泵电机功率扩大，电机负载。应该马上查明原因，开展解决，尽可能减少电机负载时长，以防损坏电机。水泵电机功率扩大的因素：

　　(1)叶轮径向间隙过小，使叶轮与导水壳造成机械设备磨擦，应关机调节间隙。

　　(2)填充料过紧，尽可能旋松旋盖螺帽。

　　(3)电机轴承毁坏，应拆换滚动轴承。

　　(4)水里含泥沙量大，运行构件被泥沙阻塞，应拆泵压井。

　　不锈钢多级潜水泵维修步骤：

　　1、不锈钢多级潜水泵的大修

　　1)机封：拆换、清理

　　2)查验滚动轴承和纹孔，拆换绝缘油

　　3)清除在运作中常发觉的缺点和漏水，定期检查拧紧各处地脚螺栓。

　　4)清理并维修隶属闸阀

　　2、不锈钢多级潜水泵的大中修：

　　1)包含大修具体内容。

　　2)维修机封，维修并拆换零件。

　　3)瓦解、检测各零部件的损坏、浸蚀和磨蚀水平，给予修补或替换。

　　4)查验轴的损坏、浸蚀和平行度，开展修补或替换。

　　5)查验滚动轴承的破损状况，修磨活塞销，调节间隙，及其拆换滚动轴承。

　　6)检测与调节叶轮密封圈，联轴器、旋盖、水泵密封等各处间隙。

　　7)查验叶轮的平衡和转子的转子动平衡。

　　8)查验、清理及其维修电机。

　　3、不锈钢多级潜水泵的维修：

　　1)包含大中修具体内容

　　2)更、好叶轮

　　3)拆换泵轴

　　4)泵壳测厚、评定，做必需的维修

　　5)精确测量和调节泵壳的平整度，防锈处理防腐蚀。

　　不锈钢多级潜水泵的正确使用

　　1、开启前查验

　　1)查验不锈钢多级潜水泵的转为是否正确，各一部分连接螺丝是不是扭紧：填充料旋盖松紧度是不是适度;家用电器路线、同步带传动设备是不是符合规定;耐腐蚀泵止逆设备是不是可以信赖;电机轴承、传动系统及其泵座的润化状况。

　　2)查验潜水泵径向间隙是不是调整好。运行前务必调整叶轮与叶壳中间的径向间隙.使叶轮在运行时不与叶壳磨擦又能做到性能要求。深井泵是选用调节螺帽来调整径向间隙的。要检查径向间隙调节螺帽上的精准定位螺丝是不是扭紧，若松脱应该马上扭紧。

　　3)查验橡胶轴承的事先润化状况。由于井内静水位线较深。启动时转动轴与橡胶轴承中间会造成干磨擦，引发震动和滚动轴承损坏，因此深井泵启动前必需对转动轴的橡胶轴承放水事先润化。

　　2、不锈钢多级潜水泵的运行、运转和关机

　　1)运行。启动时可将闸阀打开，深井泵一般选用降压启动，按压“运行”按键，电机在较低压下降压启动。

　　2)运作。潜水泵运行几秒至数十秒后.水泵转速比贴近正常的，就可以按住“运行”按键，电机马上进到正常的转速比下运作，多级离心泵正常的出水量。运行中应注意观察电流计、电流表及有关仪表盘的标示。随时随地留意水泵运行是不是平稳，水流量是否正常，留意井中水位转变状况，按时精确测量静、动水位线。河水位太过减少，使叶较吞没深层不足，吸进气体，毁坏水泵的正常运行，乃至不可以打水并损坏橡胶轴承。运行时还需要注意出水量含泥沙量，很多泥沙被水泵吸人后.会引起设备故障并使电机过载。截止阀应渐渐地开启，以防大幅度扬水，应当边留意冒出的沙量，边开启截止阀。

　　3)关机。按住运行管道补偿器的“终止”按键，就可以完成不锈钢多级潜水泵的关机。关机前须先关掉出水口上的截止阀，再切断电源。关机后供水管道里的水没所有流回井中时，不可再次启动水泵，以防启动输出功率太大，发生故障。一般应间歇性10-15min后，才可以重新开机。

　　Maintenance of stainless steel multistage submersible pump

　　Stainless steel multi-stage submersible pumps are mainly made of stainless steel metal composite materials, which are used for diving into the water to extract surface water and to transport substances. The materials include 304 stainless steel submersible pumps, 316 stainless steel deep-water well submersible pumps, 316L stainless steel submersible pumps, etc. the key applications are in extreme and irritating conditions relative to the natural environment. When the stainless steel multi-stage submersible pump is working, some small problems inevitably occur, which endanger the operation of the submersible pump, cause some small problems, common faults of differences, and different maintenance methods. This paper mainly summarizes the abnormal conditions of the stainless steel multi-stage submersible pump, the maintenance methods and their daily maintenance and Application.

　　Common problems and maintenance methods of stainless steel multistage submersible pump

　　1. Difficult or unable to start

　　If the electric switch is covered, the fuse will break immediately or the motor will only make a buzzing sound without rotating or the rotating speed will not reach the rated speed. All belong to common faults at the operation level. Generally, there are two factors: electrical equipment and mechanical equipment:

　　Electrical equipment level: (1) the working voltage is slightly low, and the motor torque is insufficient. The main reason is that the working voltage of the power supply and distribution system is slightly low, the transformer is not large enough or far from the water pump, or the conductor section of the power supply system is too small. (2) One phase of switching power supply is disconnected or one phase fuse is blown, resulting in two-phase starting of motor. (3) If the motor turns to error, two of the three live wires shall be connected at random.

　　At the mechanical equipment level: (1) pre moistening water is not injected before startup or the flow of pre moistening water is insufficient, so pre moistening water needs to be injected. (2) The coordination between the rotating shaft and the rubber bearing is unreasonable, and the clearance is too small. (3) If the rotating shaft is bent or the radial clearance of the impeller is not adjusted properly, resulting in friction or jamming, repair or adjustment shall be carried out. (4) The impeller is blocked by dirt in the pump or the pump shell and rolling bearing contain grit, which should be eliminated immediately.

　　2. No water outlet or small total flow after operation

　　After operation, the pump rotates, but there is no water or the total flow is small. It should be shut down immediately for inspection. If the time is a little longer, the rubber bearing may be ablated and the pump may vibrate. The main reasons are:

　　(1) The pump casing does not engulf the deep enough in the water or the water level in the well drops too much, and the water inlet pipe emerges from the water surface to suck in gas.

　　(2) Sediment and articles in the water block the water inlet, impeller or water guide housing passage. Be sure to clean up the dirt in the pump or well before installing the pump.

　　(3) The impeller is loose, the rotating shaft or the pump shaft is broken, resulting in the shaft rotating impeller does not rotate. This problem is caused by poor installation of pump casing or excessive adjustment of radial clearance.

　　(4) The water outlet is broken and separated, resulting in a lot of water seepage, resulting in reduced water flow or no water.

　　3. Severe vibration during operation of deep well pump

　　(1) When starting, the vibration may be caused by not adding pre moistening water or insufficient water flow. The machine should be shut down and filled with pre moistening water immediately to prevent dry friction from causing the rubber bearing to hold after continuous high temperature.

　　(2) If the radial clearance of the rotating shaft is too small, which causes friction and impact of the impeller and the water guide housing, resulting in vibration, it should be shut down immediately for inspection.

　　(3) If the rotating shaft is bent or the rubber bearing is damaged too much, the support function is lost, and the rotating shaft shakes, the rotating shaft shall be inspected and straightened.

　　(4) If the well pipe is not vertical, and the rotating shaft and water supply pipe are squeezed and bent to cause vibration, the deep well pump shall be removed to straighten the well pipe.

　　4. Output power expansion under operation of deep well pump

　　If the reading value of ammeter or power factor meter on the distribution box suddenly increases, it indicates that the motor power of deep well pump is expanded and the motor load is increased. The cause should be found out immediately and solved to reduce the load duration of the motor as far as possible to prevent damage to the motor. Factors of pump motor power expansion:

　　(1) The radial clearance of the impeller is too small, which causes friction between the impeller and the water guide housing. The clearance shall be adjusted by shutting down the machine.

　　(2) If the filling material is too tight, loosen the screw cap as much as possible.

　　(3) If the motor bearing is damaged, the rolling bearing shall be replaced.

　　(4) The water contains a large amount of sediment, and the operating components are blocked by sediment, so the pump should be removed for well killing.

　　Maintenance steps for stainless steel multi-stage submersible pump:

　　1. Overhaul of stainless steel multistage submersible pump

　　1) Mechanical seal: replacement and cleaning

　　2) Check the rolling bearings and grooves and replace the insulating oil

　　3) Remove the defects and water leakage often found in operation, and regularly check and tighten the anchor bolts at all places.

　　4) Clean and repair the attached gate valve

　　2. Overhaul of stainless steel multi-stage submersible pump:

　　1) Including overhaul details.

　　2) Repair mechanical seal, repair and replace parts.

　　3) Disintegrate, test the damage, corrosion and abrasion level of all parts and components, and repair or replace them.

　　4) Check the damage, corrosion and parallelism of the shaft, and carry out repair or replacement.

　　5) Check the damage condition of the rolling bearing, repair the piston pin, adjust the clearance, and replace the rolling bearing.

　　6) Check and adjust the clearance of impeller sealing ring, coupling, screw cap, water pump seal, etc.

　　7) Check the balance of the impeller and the dynamic balance of the rotor.

　　8) Inspect, clean and repair the motor.

　　3. Maintenance of stainless steel multi-stage submersible pump:

　　1) Including specific contents of large and medium-sized maintenance

　　2) Better impeller

　　3) Replace the pump shaft

　　4) Thickness measurement and evalsuation of pump casing and necessary maintenance

　　5) Accurately measure and adjust the flatness of the pump casing, and carry out anti rust treatment and anti-corrosion.

　　Correct use of stainless steel multistage submersible pump

　　1. Inspection before opening

　　1) Check whether the rotation of the stainless steel multi-stage submersible pump is correct, whether the connecting screws of each part are tightened, and whether the tightness of the filler screw cap is appropriate; Whether the route of household appliances and synchronous belt transmission equipment meet the requirements; Whether the anti-corrosion pump check equipment can be trusted; Lubrication condition of motor bearing, transmission system and pump seat.

　　2) Check whether the radial clearance of submersible pump is properly adjusted. Be sure to adjust the radial clearance between the impeller and the blade casing before operation The impeller can meet the performance requirements without friction with the blade shell during operation. Deep well pump adopts adjusting nut to adjust radial clearance. Check whether the precise positioning screw on the radial clearance adjusting nut is tightened. If it is loose, tighten it immediately.

　　3) Check the pre wetting condition of rubber bearings. Due to the deep static water level in the well. During startup, dry friction will be caused between the rotating shaft and the rubber bearing, causing vibration and damage to the rolling bearing. Therefore, the rubber bearing of the rotating shaft must be moistened before starting the deep well pump.

　　2. Operation, operation and shutdown of stainless steel multistage submersible pump

　　1) Operation. When starting, the gate valve can be opened. Generally, the deep well pump is started by depressurization. Press the "run" button, and the motor is started by depressurization under low pressure.

　　2) Operation. The submersible pump runs for several seconds to tens of seconds When the speed ratio of the water pump is close to normal, you can press and hold the "run" button, and the motor will immediately enter the normal speed ratio for operation. The normal water output of the multi-stage centrifugal pump. During operation, pay attention to the marks of ammeter, ammeter and relevant instrument panels. Pay attention to whether the water pump operates stably and whether the water flow is normal at any time, pay attention to the change of water level in the well, and accurately measure the static and dynamic water levels on time. The water level of the river is too low, which makes the leaves engulf the deep enough to suck in gas, which destroys the normal operation of the water pump, and even cannot draw water and damage the rubber bearing. During operation, it is also necessary to pay attention to the sediment content of water output. A lot of sediment is sucked by the water pump It will cause equipment failure and overload the motor. The stop valve shall be opened gradually to prevent large-scale water lifting. The stop valve shall be opened while paying attention to the amount of sand emerging.

　　3) Shut down. Press and hold the "stop" button of the operating pipeline compensator to complete the shutdown of the stainless steel multi-stage submersible pump. Shut off the stop valve on the water outlet before shutting down the machine, and then cut off the power supply. When the water in the water supply pipeline does not flow back to the well after shutdown, do not start the water pump again to prevent failure due to too large starting output power. Generally, restart the machine after 10-15min intermittence.