1. Common faults and troubleshooting methods of single-stage pump
1.單級泵常見(jiàn)故障及排除方法
Failure phenomenon may be the cause of elimination method 1. The flow rate is insufficient or no flow a. import and export valve does not open, in and out of the pipeline blocking impeller passage obstruction b. motor running direction is wrong, motor open phase movement, the speed is slow c. d. suction pipe leakage is not the filling of liquid pump, the pump cavity with air, save gas inlet line local the high point of e. import water supply shortage, electron absorption is high, the bottom valve is leaking f. pipeline resistance is too large, open the valve, pump selection, improper a. b. remove clog to adjust motor, tighten the motor wiring.C. Tighten the nut on sealing surface, d. air, open the discharge valve, exhaust all air vent hole in a local high point e. parking check adjustment (hooked up to the water pipe and belt use easy suction) f. reduce bend, enlarging the diameter, to choose the pump 2. A. insufficient pump discharge to press 1 check b. pipeline pump impeller passage partly blocked furring sedimentary c. valve resulted from insufficient opening in low voltage d. impeller wear and traffic lift efficiency decline in a. press 1 to rule out first,B. remove obstruction, readjust the valve opening c. stabilized d. replacement impeller 3. A. noise vibration loose pipe support instability based b. mixed with gas in the liquid c. produce cavitation flow too d. e. bearing damage motor overload running fever a. line reinforced foundation b. exhaust c. d. increasing inlet pressure decrease flow change bearing e. adjustment according to the 4 4. Motor fever a. traffic pressure gauge indicating head on the low side, overload operation b. scratchesC. motor bearing damage d. insufficient voltage a. turn down the outer diameter of outlet valve or cutting impeller b. check and exclude c. replace the bearing d. regulate the pressure 5. Water pump leakage a. mechanical seal wear and tear, rubber parts aging damage b. sealing surface o-ring gasket dislocation, damage, fastening bolts loose a. repair; replace b. repair seals, tighten bolts
故障現象
可能產(chǎn)生的原因
排除方法
1.流量不足或不出水
a.進(jìn)出口閥門(mén)未打開(kāi)，進(jìn)出管路阻塞。葉輪流道阻塞。
b.電機運轉方向不對，電機缺相動(dòng)作，轉速很慢。
c.吸入管漏氣。
d.泵內未灌滿(mǎn)液體，泵腔內有空氣，吸入管路局部高點(diǎn)處存氣。
e.進(jìn)口供水不足，吸程過(guò)高，底閥漏水。
f.管路阻力過(guò)大，泵選型不當
a.打開(kāi)閥門(mén)，去除阻塞物。
b.調整電機轉向,緊固電機接線(xiàn).。
c.擰緊各密封面螺母，排除空氣。
d.打開(kāi)排氣閥，排盡空氣。在局部高點(diǎn)處打放氣孔。
e.停車(chē)檢查、調整（并網(wǎng)自來(lái)水管和帶吸程使用易出項此現象）。
f.減少管彎頭，加大管徑，重新選泵。

2.水泵流量不足
a.先按1、原因檢查。
b.管道、泵葉輪流道部分阻塞、水垢沉積、閥門(mén)開(kāi)度不足。
c.電壓偏低。
d.葉輪磨損，流量、揚程、效率下降。
a.先按1、排除，
b.去除阻塞物，重新調整閥門(mén)開(kāi)度。
c.穩壓。
d.更換葉輪。

3.雜音振動(dòng)
a.管路支撐不穩?；A松動(dòng)。
b.液體中混有氣體。
c.產(chǎn)生汽蝕。流量過(guò)大。
d.軸承損壞。
e.電機超載發(fā)熱運行。
a.穩固管路。加固基礎。
b.排氣。
c.增加進(jìn)口壓力。減小流量。
d.更換軸承。
e.調整按4。

4.電機發(fā)熱
a.流量過(guò)大、壓力表指示揚程偏低，超載運行。
b.碰擦。
c.電機軸承損壞。
d.電壓不足。
a.關(guān)小出口閥或切割葉輪外徑。
b.檢查排除。
c.更換軸承。
d.穩壓。

5.水泵漏水
a.機械密封磨損，橡膠件老化損壞。
b.密封面、O型圈、密封墊是否錯位，破損，緊固螺栓松動(dòng)。
a.修整，更換。
b.修整密封件，擰緊螺栓。

2. Common faults and troubleshooting methods of submersible sewage pump
2.潛水排污泵常見(jiàn)故障及排除方法
Failure phenomenon may be the cause of elimination method 1. The flow rate is insufficient or no flow 1 motor reverse 2 port congestion 3 4 high lift device is pumped medium concentration is too high, or the selected pump lift is much lower than actual need 5 impeller serious wear 6 level is too low, the pump suction air 7 check the 1 way to correct motor 2 removing debris, around the pump set the best grating (but not in the pump suction filter) 3 with dilute water medium to reduce the concentration of 4Try to reduce the device head (such as in large diameter pipe or smooth, reduce the number of elbow, or increase the arc radius of elbow), or to switch to high lift pump 5 6 replacement impeller adjustment float switch position, make the lowest level in line with the requirements of installation size figure 7 correct direction of check valve 2. 1 phase 2 impeller stuck 3 cannot start winding connector or cable break 4 stator winding burn out 5 control electrical failure 1 check circuit, lack of phase 2Removing debris, it is better to set up around the pump grating (but not in the pump suction filter) 3 ohmmeter to repair 4 after repair, replacement or the stator winding 5 check control cabinet, repair or change after good motor electrical parts, before use must: 3. Burn out 1 phase 2 of the stator impeller stuck 3 winding connector or cable break 4 stator winding burn out 5 control protection control electrical appliances and electrical failure 1 configuration: find out lines, clear open phase fault;Remove dirt, tighten impeller fastening screw and stainless steel spring washer;Diluting medium with water;Flush the dredge cooling system 2 replacement of mechanical seal or O ring 3 ministries tighten fasteners 4. Too much electricity 1 stuck pipe impeller 2 pumping the liquid density or viscosity is higher 3 selected pump lift greatly exceeds the actual need, or the use conditions change device lift slash, the pump more than the recommended flow run 1 cleaning pipe and blockage in the impeller 2 change the pumping liquid density or viscosity 3 down outlet valve, reduce the traffic, or small impeller, or replace the lower lift pump
故障現象
可能產(chǎn)生的原因
排除方法
1.流量不足或不出水
1、電機反轉
2、 流道堵塞
3、 被抽介質(zhì)濃度過(guò)大
4、 裝置揚程過(guò)高，或所選泵的揚程大大低于實(shí)際需要
5、 葉輪嚴重磨損
6、 液位太低，致使泵吸入空氣
7、 止回閥方向裝反

1、 糾正電機轉向
2、 xc雜物，在泵周?chē)O置濾柵（但不可在泵入口裝濾網(wǎng)） 
3、 用水沖稀介質(zhì)降低濃度 
4、 設法降低裝置揚程（如換大直徑管或光滑管，減少彎頭數量，或zd彎頭的圓弧半徑），或改用較高揚程的泵 
5、 更換葉輪 
6、 調整浮球開(kāi)關(guān)位置，使zd液位符合安裝尺寸圖的要求 
7、 糾正止回閥方向

2.不能啟動(dòng)
1、缺相
2、葉輪卡住
3、繞組接頭或電纜斷路
4、定子繞組燒壞
5、控制電器故障
1、檢查線(xiàn)路，排除缺相問(wèn)題
2、xc雜物，zh在泵周?chē)O置濾柵（但不可在泵入口裝濾網(wǎng)）
3、用歐姆表檢查后xf
4、進(jìn)行修理，更換繞組或定子
5、檢查控制柜，修理或調換電器零件修理好電機后，使用前bx：

3.定子燒壞
1、缺相
2、葉輪卡住
3、繞組接頭或電纜斷路
4、定子繞組燒壞
5、控制電器故障

1、配置保護控制電器并：查清線(xiàn)路，xc缺相故障；qc臟物，擰緊葉輪緊固螺釘及不銹鋼彈簧墊圈；用水稀釋介質(zhì)；沖洗、stlq系統
2、更換機械密封或“O”形密封圈
3、擰緊各部緊固件

4.電流過(guò)大
1、管道、葉輪被堵
2、 抽送液體的密度或粘度較高
3、 所選泵的揚程大大超出實(shí)際需要，或使用條件改變、裝置揚程大幅度降低，使得泵超過(guò)推薦流量運行
1、清理管道和葉輪中的堵塞物
2、 改變抽送液體的密度或粘度
3、 關(guān)小出口閥，減小流量，或車(chē)小葉輪，或更換較低揚程的泵
3. Common faults and troubleshooting methods of double suction pump
3.雙吸泵常見(jiàn)故障及排除方法
The pump does not absorb water, the pressure gauge and the vacuum gauge needle jumps violently. 1.2. Leakage of pipeline or instrument 1.(2) the pump does not absorb water, and the vacuum gauge shows a high vacuum.2. Excessive resistance of suction pipeline;1. Adjust or replace the bottom valve;2. Clean or replace the suction pipe;3. Reduce the suction height (3) the pump does not give out water, the pressure gauge shows that there is pressure.2. The rotation direction is wrong;3. Impeller blockage;4. Insufficient rotation speed;1. Check or shorten the outlet pipe;2. Correct the rotation direction of the motor;3. Clean the impeller;4. Check the power supply voltage, increase the speed 5. Increase the suction pipe diameter, eliminate blockages.2. Excessive wear of double-suction sealing ring or impeller damage;3. The rotation speed is lower than the specified value. 4.5. Air leakage in the suction pipe;6. There is blockage in the pipeline;7. Medium density does not meet the requirements of pump;8. The head of the device does not conform to the pump head.2. Replace the damaged parts;3. Adjust to rated speed;4. Fully open;5. Seal off the leak;6. Remove blockages;7. Re-check or replace the motor with appropriate power;8. Try to reduce the installation height of the pump. (5) abnormal sound inside the pump, the pump does not load water.2. Friction between impeller and double suction seal ring;3. The head of the device does not accord with the pump head.2. Check the cause and eliminate mechanical friction;3. Reduce valve opening (vi) abnormal pump vibration2. Unbalanced impeller;3. Pump shaft is different from motor shaft;4. Loose anchor screw;5. Axis bending;6. Bearing wear;7. Friction between rotating part and fixed part;1. Adjust the outlet gate valve to operate within the specified energy range;2. Impeller correction static balance;3. Correct the concentricity of pump shaft and motor shaft;4. Tighten the anchor screw;5. Replace the shaft;6. Replace the bearing;7. Repair the pump or improve the use condition;Open the inlet valve and adjust the outlet valve. (7) bearing overheating.2. Deterioration of lubricating oil;3. Pump shaft and motor shaft are not on the same center line;1. Check and clean the bearing body;Lubricating oil;2. Drain and clean the oil tank and add new oil;3. Correct the concentricity of the two axes so that they are on the same center line;4. Check the balance degree of the rotor or operate at a small flow rate. (8) serious seal leakage.2. Severe wear of friction pair;3. Non-uniform anastomosis of static and static rings;4. Too large friction pair and broken static ring;1. Explain the condition of the medium to the pump supplier with appropriate sealing elements;2. Replace the worn parts and adjust the spring pressure;3. Readjust the sealing assembly;4. Remove and replace the static ring, so that the vertical error with the shaft is less than 0.10, and install the sealing assembly as required;5. Replace o-ring (9) motor overload2. The relative density of medium becomes larger;3. Friction occurs in the rotating part;4. The device resistance becomes lower, so that the running point is inclined to the place of large flow rate.2. Change the operation process;3. Repair friction parts;4. Check the pressure of suction and discharge pipeline with the original change, and adjust it.
故障現象
可能產(chǎn)生的原因
排除方法
（一）.泵不吸水，壓力表及真空表的指針劇烈跳動(dòng)
1．注入的水不夠；
2．管路或儀表漏氣。
1.再往泵內注水；
2．擰緊堵塞漏氣處。
（二）泵不吸水，真空表顯示高度真空。
1．底閥沒(méi)打開(kāi)或已淤塞；
2．吸水管路的阻力太大；
3．吸水高度太高。
1．校正或更換底閥；
2．清洗或更換吸水管路；
3．降低吸水高度。
（三）泵不出水，壓力表是顯示有壓力。
1．出水管路阻力太大；
2．旋轉方向不對；
3．葉輪堵塞；
4．轉速不夠；
5．吸入管路過(guò)小或雜物堵塞。
1．檢查或縮短出水管路；
2．糾正電動(dòng)機的旋轉方向；
3．清洗葉輪；
4．檢查電源電壓，提高轉速。
5．加大吸入管徑，xc堵塞物。
（四）泵消耗的功率過(guò)大。
1.葉輪或進(jìn)水管路阻塞；
2.雙吸密封環(huán)磨損過(guò)多，或葉輪損壞； 
3.轉速低于規定值。 
4.進(jìn)口或出口閥沒(méi)充分打開(kāi)； 
5.在吸入管路中漏入空氣；
6.管道中有堵塞； 
7.介質(zhì)密度與泵要求不符合；
8.裝置揚程與泵揚程不符合。
1．清洗葉輪或管路；
2．更換損壞的零件；
3．調正至額定轉速；
4．充分開(kāi)啟；
5．把泄漏處封死；
6．xc堵物；
7．重新核算或更換合適功率的電動(dòng)機；
8．設法降低泵的安裝高度。

（五）泵內部聲音反常，泵不上水。
1.填料壓得太緊； 
2.葉輪與雙吸密封環(huán)磨擦；流量過(guò)大。
3.裝置揚程與泵揚程不符合。

1.擰松填料壓蓋；
2．檢查原因，xc機械磨擦；
3．減小閘閥開(kāi)度。

（六）泵不正常振動(dòng)。
1． 泵發(fā)生了汽蝕；
2． 葉輪不平衡；
3． 泵軸與電機軸不同心；
4． 底腳螺釘松動(dòng)；
5． 軸彎曲；
6． 軸承磨損；
7． 轉動(dòng)部分和固定部分有摩擦；
8． 關(guān)小了進(jìn)口。

1．調節出水閘閥，使之在規定的性 能范圍內運轉；
2． 葉輪校正靜平衡；
3． 校正泵軸與電動(dòng)機軸的同心度；
4． 擰緊底腳螺釘；
5． 更hx軸；
6． 更換軸承；

7． 檢修泵或gs使用情況； 8． 打開(kāi)進(jìn)口閥，調節出口閥。
（七）軸承
1．軸承內沒(méi)有油；
2．潤滑油變質(zhì)；
3．泵軸與電機軸不在同一線(xiàn)上；
4．振動(dòng)

1．檢查并清洗軸承體；加潤滑油；
2． 排去并清洗油池再加新油；
3． 校正兩軸的同心度使在同一線(xiàn)上；
4． 檢查轉子的平衡度或在較小的流量處運轉。

（八）密封泄漏嚴重
1．密封元件材料選用不當；
2． 摩擦副嚴重磨損；
3． 動(dòng)靜環(huán)吻合不勻；
4． 摩擦副過(guò)大，靜環(huán)破裂；
5． O型圈損壞。

1．向供泵單位說(shuō)明介質(zhì)情況，配以適當的密封件；
2． 更換磨損部件，并調整彈簧壓力； 
3． 重新調整密封組合件；
4． 拆換靜環(huán)，使之與軸垂直度誤差小于0.10，按要求裝密封組合件；
5． 更換O型圈。

（九）電機過(guò)載
1．泵和原動(dòng)機不對中；
2． 介質(zhì)相對密度變大；
3． 轉動(dòng)部分發(fā)生摩擦；
4． 裝置阻力變低，使運行點(diǎn)偏向大流量處。

1．調整泵和原動(dòng)機的對中性；
2． 改變操作工藝；
3．xf摩擦部位；
4． 檢查吸入口和排出管路壓力與原來(lái)的變化情況，并予以調整。

4. Common faults and troubleshooting methods of high pressure boiler feed water pump
4.gygl給水泵常見(jiàn)故障及排除方法
Failure phenomenon may be the cause of elimination method (a). After the feed pump operation is not water, pressure gauge does not display the pressure 1. The inlet pipe of the water pressure is lower than the specified temperature vaporization pressure 2. The pump rotation direction error 1. Check and take measures to improve the feed water pressure 2. (2). The correct rotation direction for carrying capacity and pump in the working process of the pressure is less than 1. With previous page 2. The impeller flow channel and the filter on the inlet pipe stuck 3. There is no air inlet pipe and pump out4. Grinding of dynamic and static ring gap is big, the accepted value of more than 5. E. 1. Balance device clearance than with previous 2. Check the inlet pipe mesh and trying to get rid, 3, 4. Put the net air strip inspection, ensure drawings required 5. The collapse of the inspection, and repair of (3). The motor overload 1. The pump flow is greater than the specified value (2) pump action part grinding 1. Check with flowmeter (2) reset warm pump (4). Flexible and reasonable pump vibration:1) vibration peak gradually increase will never disappear. 2) the peak age small, sometimes disappeared 3) coupling level of bearing vibration value 1) 1. The unreasonable warm pump, pump and motor 2 different heart impeller static balancing out-of-tolerance 3. The rotor dynamic balance of 4. The movement of the pump parts grinding 5. The pipeline to pump displacement pump force 2) 1. The movement of the pump clearance is too large (2) interference, such as a line or system vibration 3) 1. The pump and motor coupling different heart 2. 1) coupling1. Reasonable heating pump, reset center 2. To find the impeller static balance (3) to find the impeller dynamic balance 4. The collapse of the inspection, and repair of the 5. Reduce the force line, recalibration pump 2). 1. The best disintegration, reduced noise gap 2. Best to eliminate interference, reduce resonance May 3). 1. Check coupling center 2. Replace the coupling aprons (5). The balancing mechanism serious wear 1. The radial clearance of the balancing device is too small (2) pump evaporation 1. Enlarge the radial clearance, balance2. Avoid vaporizing accidents, increase the balancing disc plate hardness (6). Segment the place such as untight seal 1. Tighten bolts not tighten 2. Combining with the surface damage 3. The big water [drop 1. Stop the pump, cooling screw (2) after grinding processing 3. Control of deaerator temperature drop gradient (7). The shaft end seal is not strongly resist packing 1. Packing wear 2. 3. The pump vibration gland not tighten the 4. Bushing wear, can not add packing 1. Identify the reasons for packing wear2. Eliminate pump vibration 3. Tighten the packing gland 4. Replace the shaft sleeve (8). Operation 1. The bearing center didn't aim at the pump and motor (2) bearing gap is too small or too big 3. Oil dirty 1. Cold to school center 2. 3. Ensure your drawings in new oil (9). The pipe vibration 1. The inlet line out line without reinforcement (2) of the feed water pump air emissions small 1. Reinforce the line 2. Improve the exhaust valve (10) bearing don't work properly1. Pump empty displacement is less than the allowable value 2. Main engine load rejection 

故障現象
可能產(chǎn)生的原因
排除方法
(一).給水泵運轉后不出水，壓力計不顯示壓力。
1. 進(jìn)水管的水的壓力低于規定溫度下的汽化壓力。
2. 水泵的轉動(dòng)方向錯誤。
1．檢查并采取措施，提高進(jìn)水壓力。
2．改正轉動(dòng)方向
(二).工作過(guò)程中水泵輸水量及壓力不足。
1.同上一頁(yè)。
2. 葉輪流道及進(jìn)水管的過(guò)濾網(wǎng)被堵。
3. 進(jìn)水管及泵內有空氣沒(méi)有放出。
4. 動(dòng)靜環(huán)間隙磨大，超過(guò)允許值。
5. 平衡裝置的間隙超過(guò)規定值。
1．同上一頁(yè) 
2. 檢查進(jìn)水管濾網(wǎng)并設法xchu，
3. 放凈空氣。 
4. 解體檢查，保證圖紙要求。 
5. 解體檢查，并xufu之。
(三).電機過(guò)載
1.泵的流量大于規定值。
2. 泵動(dòng)靜部分研磨。
1．用流量計檢查 
2．重新調靈活。合理暖泵。
(四).泵振動(dòng): 1）振動(dòng)峰值逐漸zdyb消失。
2）振動(dòng)峰值時(shí)大時(shí)小，有時(shí)會(huì )消失。
3）聯(lián)軸器軸瓦水平振動(dòng)值大。
1）1.暖泵不合理，泵與電機不同心。
2. 葉輪靜平衡超差。
3. 轉子動(dòng)平衡超差。
4. 泵的動(dòng)靜部分研磨。
5. 管路給泵作用力使泵移位。
2）1. 泵的動(dòng)靜間隙過(guò)大。
2. 外界干擾，如管路或者系統振動(dòng)
3）1. 泵與電機聯(lián)軸器不同心。
2. 聯(lián)軸
1) 1.合理暖泵，重調
2.重新找葉輪靜平衡
3.重新找葉輪動(dòng)平衡
4.解體檢查，并xf之
5.減少管路的作用力，重新校正水泵
2). 1.zh解體，縮小動(dòng)靜間隙。
2.zhxc外界干擾，減少共振的可能
3). 1．校驗聯(lián)軸器
2．更換聯(lián)軸器膠圈
(五).平衡機構嚴重磨損
1. 平衡裝置的徑向間隙過(guò)小。
2. 泵汽化。
1.放大徑向間隙，zd平衡力。
2.避免汽化事故，增加平衡盤(pán)、平衡板硬度。
(六).節段等處密封不嚴。
1. 拉緊螺栓沒(méi)有擰緊。
2. 結合面損壞。
3. 水溫溫降大。
1．停泵，lq后擰緊
2．處理、研磨
3．控制除氧器溫降梯度。
(七).軸端密封不嚴加不住盤(pán)根。
1.填料磨損。
2. 泵振動(dòng)。
3. 填料壓蓋未擰緊
4. 軸套磨損，加不住盤(pán)根
1．找出填料磨損原因 
2．xc泵振動(dòng) 
3．擰緊填料壓蓋
4．更換軸套
(八).軸承工作不正常
1. 水泵和電機沒(méi)對準
2. 軸瓦間隙太小或太大
3. 油臟。
1．冷態(tài)重新校
2．保證圖紙要求 
3．hx油
(九).管路振動(dòng)
1.吸入管路、吐出管路沒(méi)有加固。
2. 給水泵的空排量小
1．加固管路
2．改進(jìn)排閥
(十).軸承工作不正常
1.泵空排量少于允許值 
2. 主機甩負荷
1．zd泵的空排量
2．除氧器應按壓力水位自動(dòng)調節
3．除氧器有充足汽源
4．增加除氧器標高
5．除氧器放氣門(mén)關(guān)閉

5. Meanings of commonly used parameters of water pump
5.水泵常用參數代表的含義？
Pump common parameters pumps are commonly used in our daily use of representative meaning, especially used for the first time we have a lot of questions don't know the meaning of parameter represents the actual flow rate (m3 / h or L/s) : refers to the number of pump conveying fluid, flow expressed in the letter Q head (m) : refers to the unit weight of the fluid through the pump can always head (level), head with letter h said power (KW) : refers to the output power of pump, and also is the power of the motor to the pump shaft power with the letter P saidEfficiency: refers to the percentage ratio of pump output power Pe to input power P, and reflects the shaft power utilization rate speed (unit r/min) of the pump in the process of transfer volume: refers to the pump blade revolution per minute, which is represented by n as an important factor affecting pump performance. When the speed changes, the performance of the pump will change
水泵常見(jiàn)參數在我們日常使用中水泵常用參數代表的含義，尤其是初次使用時(shí)大家定有很多疑問(wèn)不知道參數代表實(shí)際的含義。
流量 (單位 m3/h或L/s)：是指單位時(shí)間內泵輸送流體的數量，流量用字母Q表示。
揚程(單位 m)：是指單位重量的流體通過(guò)泵獲得的總能頭（高度），揚程用字母H表示。
功率（單位 KW）：是指泵的輸出功率，也就是電機傳給泵軸上的功率，功率用字母P表示。
效率：是指泵的輸出功率Pe與輸入功率P之比的百分數，反應泵在傳遞量過(guò)程中軸功率利用率。
轉速（單位 r/min）：是指泵葉每分鐘的轉數，用n表示。它是影響泵性能的一個(gè)重要因素，當轉速變化時(shí)，水泵的性能將發(fā)生變化。
6. Common fault diagnosis and maintenance of water pump

6.水泵常見(jiàn)故障診斷及維修

Failure description: no liquid supply, insufficient supply of liquid or insufficient pressure(2) the speed is too low;(3) the system head is too high;(4) too high suction range;(5) the impeller or pipeline is blocked;(6) the rotation direction is wrong;(7) leakage of air or inlet pipeline;(8) the packing or sealing in the packing box wear, so that air leakage into the pump shell;(9) insufficient suction head when pumping hot or volatile liquid;(10) the bottom valve is too small;(11) insufficient immersion depth of bottom valve or inlet pipe;(12) too large impeller clearance;(13) impeller damage;(14) impeller diameter is too small;(1) check whether the pump shell and inlet pipeline are fully filled with liquid;(2) check whether the wiring of the motor is correct, whether the voltage is normal or the steam pressure of the turbine is normal; (3) check the water head of the system (especially the friction loss);(4) check the existing net pressure head (too small or too long inlet pipeline will cause great friction loss);(5) check for obstacles;(6) check the rotation direction;(7) check whether there is cavitation or air leakage in the inlet pipeline;(8) check the packing or seal and replace it as needed to check whether the lubrication is normal;(9) increase the suction head, consult the manufacturer;(10) install the bottom valve of correct size;(11) consult the manufacturer about the correct immersion depth for fender to eliminate eddy current;(12) check whether the impeller clearance is correct;(13) check the impeller and replace it as required;(14) consult the manufacturer about the correct impeller diameter;(15) check the correct position, check the outlet nozzle or pipe

 1、故障描述：無(wú)液體提供，供給液體不足或壓力不足。水泵常見(jiàn)故障
故障原因：

(1)水泵沒(méi)有注水或沒(méi)有適當排氣；（2）速度太低；（3）系統水頭太高；（4）吸程太高；（5）葉輪或管線(xiàn)受堵；

（6）轉動(dòng)方向不對；（7）產(chǎn)生空氣或入口管線(xiàn)有泄露；（8）填料函中的填料或密封磨損，使空氣漏入泵殼中；

（9）抽送熱的或揮發(fā)性液體時(shí)吸入水頭不足；（10）底閥太??；（11）底閥或入口管浸沒(méi)sd不夠；（12）葉輪間隙太大；

（13）葉輪損壞；（14）葉輪直徑太??；（15）壓力表位置不正確。
解除方法：
（1）檢查泵殼和入口管線(xiàn)是否全部住滿(mǎn)了液體；（2）檢查電機的接線(xiàn)是否正確，電壓是否正?；蛘咄钙降恼羝麎毫κ欠裾?。
（3）檢查系統水頭（特別是摩擦損失）；（4）檢查現有的凈壓頭（入口管線(xiàn)太小或太長(cháng)會(huì )造成很大的摩擦損失）；
（5）檢查有無(wú)障礙物；（6）檢查轉動(dòng)方向；(7)檢查入口管線(xiàn)有無(wú)氣或者空氣泄露；
（8）檢查填料或密封并按需要更換，檢查潤滑是否正常；（9）zd吸入水頭，向廠(chǎng)家咨詢(xún)；（10）安裝正確尺寸的底閥；
（11）向廠(chǎng)家咨詢(xún)正確的浸沒(méi)sd。用擋泥板消理渦流；（12）檢查葉輪間隙大小是否正確；（13）檢查葉輪，按照規定要求進(jìn)行更換；
（14）向廠(chǎng)家咨詢(xún)正確的葉輪直徑；（15）檢查位置是否正確，檢查出口管嘴或管道。
7. What is the basis for selecting the site of drainage pump station
7.排水泵站站址的選擇依據什么？
(1) the site should be selected at the lower part of the drainage area, which is suitable for natural confluence. Attention should be paid to making full use of the original drainage system, so as to reduce the earthwork and occupation area of the channel excavation.But should pay attention to when using original canal canal system adjustment to the influence of the pumping station in the future, site near the drainage area, as far as possible to shorten the length of the outlet channel (2) the site should fall outside the lower river area (i.e., is located in the downstream of the river), in order to reduce the discharge head, reduce the installed capacity and power consumption (3) the site should fall in the river straight, riverbed stability, less scour deposition of concave bank of the river or curved reach;Width should be Y on the bund, to facilitate the construction of the cofferdam and quantity field decorate, but unfavorable also wide, as much as possible so as not to drain is too long to meet the requirements of the feed water and drainage positive positive (4), we must give full consideration to the conditions, as far as possible make the drainage pump and suction drainage pumps (5) pay attention to the combination of comprehensive utilization, pay attention to the vision and the recent combination for irrigation requirement, should consider to irrigating gate irrigation and irrigation irrigation system of elevation and arrangement, as far as possible to combine irrigation and drainage,(6) the site should be selected in a place with good geological conditions, avoiding the soft soil and fine sand stratum of silt as far as possible, and avoiding the waste river, water pool, deep ditch and other places prone to deposition

在建設排水泵站選擇站址應注意以下幾點(diǎn)。
(1)站址應選在排水區的較低處，與自然匯流相適應。耍注意充分利用原有的排水系統，以減少渠道開(kāi)挖的土方工程和占地面積，
但在利用原有渠系時(shí)要注意將來(lái)渠系調整對泵站的影響，站址要盡量靠近容泄區，以縮短泄水渠的長(cháng)度。

(2)站址應選在外河水位較低的地段（即設在外河下游處），以降低排水揚程，減少裝機容量和電能消耗。
(3)站址應選在河流順直，河床穩定，沖刷、淤積較少的河段或彎曲河段的凹岸；應有Y定的外灘寬度，以利于施工圍堰和工料場(chǎng)的布置，
但也不宜寬，以免排水渠太長(cháng)。盡可能滿(mǎn)足正面進(jìn)水和正面泄水的要求。
(4)要充分考慮自排條件，盡可能使自排水泵與抽排水泵相結合。    
(5)要注意綜合利用，注意遠景和近期結合。如有灌溉要求，則應考慮灌溉引水口和灌溉渠首的高程和布置，盡可能做到排灌結合，
提高設備利用率，擴大工程效益。
(6)站址應選在地質(zhì)條件較好的地方，盡可能避開(kāi)淤泥軟土和粉細砂地層，避開(kāi)廢河道、水潭、深溝等易淤積的地方。