|
在检修过程中，水泵故障的诊断是一个关键的环节，以下给出几种常见故障及消除措施，供大家有的放矢地进行水泵故障的诊断。
1、无液体提供，供给液体不足或压力不足
1）泵没有注水或没有适当排气
消除措施：检查泵壳和入口管线是否全部注满了液体。
2）速度太低
消除措施：检查电机的接线是否正确，电压是否正常或者透平的蒸汽压力是否正常。
3）系统水头太高
消除措施：检查系统的水头（特别是磨擦损失）。
4）吸程太高
消除措施：检查现有的净压头（入口管线太小或太长会造成很大的磨擦损失）。
5）叶轮或管线受堵
消除措施：检查有无障碍物。
6）转动方向不对
消除措施：检查转动方向。
7）产生空气或入口管线有泄漏
消除措施：检查入口管线有无气穴和／或空气泄漏。
8）填料函中的填料或密封磨损，使空气漏入泵壳中
消除措施：检查填料或密封并按需要更换，检查润滑是否正常。
9）抽送热的或挥发性液体时吸入水头不足
消除措施：增大吸入水头，向厂家咨询。
10）底阀太小
消除措施：安装正确尺寸的底阀。
11）底阀或入口管浸没深度不够
消除措施：向厂家咨询正确的浸没深度。用挡板消除涡流。
12）叶轮间隙太大
消除措施：检查间隙是否正确。
13）叶轮损坏
消除措施：检查叶轮，按要求进行更换。
14）叶轮直径太小
消除措施：向厂家咨询正确的叶轮直径。
15）压力表位置不正确
消除措施：检查位置是否正确，检查出口管嘴或管道。
2、泵运行一会儿便停机
1）吸程太高
消除措施：检查现有的净压头（入口管线太小或太长会造成很大的磨擦损失）。
2）叶轮或管线受堵
消除措施：检查有无障碍物。
3）产生空气或入口管线有泄漏
消除措施：检查入口管线有无气穴和／或空气泄漏。
4）填料函中的填料或密封磨损，使空气漏入泵壳中
消除措施：检查填料或密封并按需要更换。检查润滑是否正常。
5）抽送热的或挥发性液体时吸入水头不足
消除措施：增大吸入水头，向厂家咨询。
6）底阀或入口管浸没深度不够
消除措施：向厂家咨询正确的浸没深度，用挡板消除涡流。
7）泵壳密封垫损坏
消除措施：检查密封垫的情况并按要求进行更换。
3、泵功率消耗太大
1）转动方向不对
消除措施：检查转动方向。
2）叶轮损坏
消除措施：检查叶轮，按要求进行更换。
3）转动部件咬死
消除措施：检查内部磨损部件的间隙是否正常。
4）轴弯曲
消除措施：校直轴或按要求进行更换。
5）速度太高
消除措施：检查电机的绕组电压或输送到透平的蒸汽压力。
6）水头低于额定值。抽送液体太多
消除措施：向厂家咨询。安装节流阀，切割叶轮。
7）液体重于预计值
消除措施：检查比重和粘度。
8）填料函没有正确填料（填料不足，没有正确塞入或跑合，填料太紧）
消除措施：检查填料，重新装填填料函。
9）轴承润滑不正确或轴承磨损
消除措施：检查并按要求进行更换 。
10）耐磨环之间的运行间隙不正确
消除措施：检查间隙是否正确。按要求更换泵壳和／或叶轮的耐磨环。
11）泵壳上管道的应力太大
消除措施： 消除应力并厂家代表咨询。在消除应力后，检查对中情况。
In the overhaul process, pump fault diagnosis is a key link, the following are some common faults and eliminate measures for your targeted to pump fault diagnosis.
1, provided no liquid, liquid supply inadequate or insufficient pressure
1) no water injection pump or without proper exhaust
The elimination of measures: shell and pump check whether all import pipeline is full of the liquid.
2) the speed is too low
The elimination of measures: check motor wiring is correct, whether it is normal or voltage turbine steam pressure is normal.
3) System head too high
The elimination of measures: inspection system by the head (especially the friction losses).
4) absorption way too high
The elimination of measures: examine the existing net pressure head (import pipeline is too small or too long will cause great friction losses).
5) impeller or by blocking pipeline
The elimination of measures: check for obstructions.
6) rotation wrong direction
The elimination of measures: check rotational direction.
7) produce or import pipelines have air leakage
The elimination of measures: check whether imported gas pipeline Point and / or air leakage.
8) Fill in the letter or filler seal wear, leakage into the pump air in the shell
The elimination of measures: check filler or sealed in accordance with need to be replaced, check whether it is normal for lubrication.
9) pumping heat or inhalation of volatile liquid at the head inadequate
The elimination of measures: increased inhalation head to the manufacturers advice.
10) by the end of valve is too small
The elimination of measures: the installation of the correct size at the end of the valve.
11) by the end of the entrance valve or inadequate depth of immersion
The elimination of measures: the right to the manufacturers Advisory immersion depth. With lagging eliminate swirl.
12) impeller clearance too
The elimination of measures: check clearance is correct.
13) impeller damage
The elimination of measures: Impeller inspection, as required replacement.
14) impeller diameter is too small
The elimination of measures: the right to the manufacturers Advisory impeller diameter.
15) Pressure Gauge location incorrect
The elimination of measures: check whether the correct location, inspection of the mouth or export pipeline.
2, pump operation while it stands
1) absorption way too high
The elimination of measures: examine the existing net pressure head (import pipeline is too small or too long will cause great friction losses).
2) impeller or by plugging pipeline
The elimination of measures: check for obstructions.
3) produce or import pipelines have air leakage
The elimination of measures: check whether imported gas pipeline Point and / or air leakage.
4) Fill in the letter or filler seal wear, leakage into the pump air in the shell
The elimination of measures: check filler or sealed in accordance with need to be replaced. Check whether it is normal for lubrication.
5) pumping heat or inhalation of volatile liquid at the head inadequate
The elimination of measures: increased inhalation head to the manufacturers advice.
6) by the end of the entrance valve or inadequate depth of immersion
The elimination of measures: the right to the manufacturers Advisory immersion depth, with the elimination of baffle swirl.
7) pump gaskets damaged shell
The elimination of measures: check gaskets according to the situation called for the replacement.
3, pump too much power consumption
1) rotating wrong direction
The elimination of measures: check rotational direction.
2) damage to the impeller
The elimination of measures: Impeller inspection, as required replacement.
3) rotating components fatal
The elimination of measures: check their internal components and wear Gap is normal.
4) axial bending
The elimination of measures: Straightening axis or replaced as required.
5) the speed is too high
The elimination of measures: check motor winding voltage or transported to the steam turbine pressure.
6) head below the rated value. Pumping too much liquid
The elimination of measures: to the manufacturers advice. Installation throttle, cutting impeller.
7) the expected value of the liquid -
The elimination of measures: the proportion of checks and viscosity.
8) Fill letter did not correct filler (less than filler, not correctly insert or running-in, the filler is too strict)
The elimination of measures: check filler, filler re-loading letter.
9) bearings lubricated bearings wear or incorrect
The elimination of measures: inspection as required replacement.
10) Wearable gap running between Central incorrect
The elimination of measures: check clearance is correct. Shell pump replacement, as required, and / or the impeller Wearable Ring.
11) Shell pump too much stress on the pipeline
The elimination of measures: the elimination of stress and manufacturers on behalf of the Advisory. In eliminating stress, check on the situation. | 
