故  障

原  因

消除方法

泵不吸水，壓力表及真空表指針劇烈跳動。

注入泵的水不夠；進水管漏氣。

再往泵內注水；堵塞漏氣處。

泵不吸水，但真空表顯示高度真空。

底閥沒打開或淤塞；吸水管阻力太大：吸水高度太高。

校平或更換底閥；清洗或更換吸水管；降低吸水高度。

泵不出水，壓力表顯示有壓力。

泵軸旋轉方向不對；出水管阻力太大；葉輪淤塞；轉速不夠。

改正轉向；減少水管長度或清除淤塞；清洗葉輪；增加轉速。

泵流量減少或揚程下降。

葉輪或管路阻塞；密封環(huán)或葉輪磨損嚴重；轉速低于規(guī)定值。

清洗葉輪或管路；更換損壞的零件；調整到額定轉速。

泵消耗的功率過大。

填料壓得太緊；葉輪與雙吸密封環(huán)磨擦；流量過大。

擰松填料壓蓋；消除機械磨擦；關小出水閘閥。

泵內聲音反常，吸不上水。

吸水高度過高；吸水管漏氣；流量過大；發(fā)生汽蝕。

減少吸水高度；堵塞漏氣處；調節(jié)出水閘閥在規(guī)定工況用。

泵振動厲害。

泵發(fā)生汽蝕；葉輪不平衡；泵與電機不同心；地腳螺栓松動。

消除汽蝕；葉輪校平衡；校泵與電機的同軸度；擰緊地腳螺栓。

軸承過熱。

潤滑油不足或過多，或變質；泵與電機軸不同心。

檢查油量，清洗軸承并換油；校泵軸與電機的同軸度。

Troubles

Cause

Remedies

 After the pump starting，no

 water i s drawn in. and the

 hands of、racuunl gauge and

 manometer beat heavily．

The water poured in the pmnp is not enough．

Leakage of air is found from the suction

 pipe．

Pour water into the pump again．

Block the leaking place．

The pump doesn’t draw any water but a high degree vacuum is indicated on the vacuum gauge

The foot valve is not opened．

The resistance of suction is too high．

The suetion head is too high．

Correct or renew the foot valves．

Clean or renew the suction pipe．

Make the suction head lower．

No water is pumped out．But high pressure is shown on the outlet nlanonleter．

The direction of the rotation is not right．

The suction resistance is too high．

The impeller flow passage is clogged．

The revolutions is not enough．

Change the direction of the rotation．

Check the length of the pipe．

Clean the impeller．

Increase the revolutions．

Tile flow rate is decreasing or the laead is low．

The impeller flow passage or(inlet pipe and outlet pipe)in-out-let pipes are clogged．

The seal ring and the impeller is worn out．

The running speed of the pump is lower than

 the rated．

Clean tile impeller and the pipe passage way．

Renew the worn parts．

Increase the revolutions．

Over consumption of the pump power.

Packing is too tight

 The impeller is rubbed by double suction seal ring．

The flow rate is too large．

Loosen the packing gland．

Clear out the mechanic friction．

Turn the discharge valve brake smaller．

Unexpected noises are heard and 110 water is drawn．

The suction resistance is too high．

The suction head is too high．

Leakage of air found from the suction pipe．

Error is found．

Check the pipe and the foot valve．

Make the suction head lower．

Block the leaking place．

Adjust the use of discharge breake valve in specific working condition．

The pump vibrates heavily．

Error is found．

The impeller is not balance．

Tile pump shaft is not concentric with the motor.

The nuts of foundation are loose．

Clear out the error．

Correct impeller static balance．

Screw the nuts of the foot bolt tightly．

Correct tile coaxial degree between pump and motor shaft．

The beating is overheated．

The grease is not enough or too much or goes bad．

The pump and the motor shaft is not concentric．

Clean the bearing and renew the oil．

Correct the pump and the motor shaft coaxial degree．