六、可能發(fā)生的故障及消除方法
|
故 障 |
原 因 |
消 除方法 |
|
1、泵不出水，壓力表及真 空表指針劇烈跳動。 |
注入泵的水不夠；進(jìn)水管漏氣。 |
再往泵內(nèi)注水；堵塞漏氣處。 |
|
2、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。 |
|
3、泵不出水，壓力表顯示 有壓力。 |
泵軸旋轉(zhuǎn)方向不對；出水管阻 力太大；葉輪淤塞；轉(zhuǎn)數(shù)不夠。 |
改正轉(zhuǎn)向；減少水管長度或清 除淤塞；清洗葉輪；增加轉(zhuǎn)數(shù)。 |
|
4、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(yán)重；轉(zhuǎn)速低于規(guī)定值。 |
清洗葉輪或管路；更換損壞的 零件；調(diào)整到額定轉(zhuǎn)速。 |
|
5、泵消耗的功率過大。 |
填料壓得太緊；葉輪與雙吸密 封環(huán)磨損；流量過大。 |
擰松填料壓蓋；消除機(jī)械磨擦； 關(guān)小出水閘閥。 |
|
6、泵內(nèi)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(diào) 節(jié)出水閘閥在規(guī)定工況用。 |
|
7、泵振動厲害。 |
泵發(fā)生汽蝕；葉輪不平衡；泵與 電機(jī)不同心；地腳螺栓松動。 |
消除汽蝕；葉輪校平衡；校泵與 電機(jī)的同軸度；擰緊地腳螺栓。 |
|
8、軸承過熱。 |
潤滑油不足或過多，或變質(zhì)；泵 與電機(jī)軸不同心。 |
檢查油量，清洗軸承并換油；校泵 軸與電機(jī)的同軸度。 |
Problems:
Cause / Remedy
|
Fault |
Cause |
Remedy |
|
After the pump
starting，no water is drawn in,
and the hands of vacuum
gauge and manometer beat
heavily． |
The water poured in
the pump is not enough Leakage of air
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 suction head is
too high． |
C0rrect 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 manometer． |
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． Whether it clogged． Clean the impeller． Increase the
revolutions． |
|
The flow rate is
decreasing or the head is low． |
The impeHer flow
passage or(inlet pipe and outlet
pipe)in-out-let pipes are clogged. The seal ring or
the impeller is out worn. The running speed
of the pump is lower than |
Clean the impeller
and the pipe passage way. Renew the worn
parts． Increase the
revolutions． |
|
Over consumption of
the pump power. |
Packing is too tight
and the impeller is rubbed by double
suction seal ring． The flow rate is
too Iarge． |
Loosen the packing
gland． Clear out the
mechanic friction． Turn the discharge
valve brake smaller． |
|
Uexpected noises
are heard and no water is
drawn． |
The suction
resistance is too high． The suction head is
too high． Leakage of air
found fmm the suction pipe． Error is found． |
Check the pipe and
the foot valve． Make the suction
head Iower． Block the leaking
place． Adjust the use of
discharge breake valve in snecific workine
condition． |
|
The pump vibrates
heavily． |
Error is found． The impeller is not
balance． The Dum’p
shaft is not concentric with the motor． The nuts of
tbundation are loose． |
Clear out the error． Correct impeller
static balance． Screw the unts of
the foot bolt tightly． Correct the coaxial
degree between pump and nlolor shaft． |
|
The beating is
overheated． |
The grease is not
enough or too much or goes bad． The pump and the
notor shaft is not conrertlric． |
Clean the bearing
and renew the oil． Correct the pump
and the motor shaft coaxial degree． |