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Tel:+86 21 3251 3913
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Email:info@yzvacuum.com
Seven common solution pump failure
Add Time : 2013-11-13 16:27:16   Views : 2789
Heat pump solutions
Reason: bearing damage ; Rolling or bracket cover the gap is too small; shaft bent or two-axis misalignment ; tape too tight ; lack of oil or oily bad ; balancing hole impeller clogged impeller out of balance, increased to side thrust. Remedy: Replace the bearings ; dismantle the back cover, between the bracket and the bearing installation gasket ; investigation or adjustment of the shaft concentricity of the two axes ; loosen the tape proper tightness ; filling a clean butter , butter accounted bearings about 60% of the voids ; clear balance hole blockage .

No water absorption solution
The reason is that the pump body with air or gas into the water volume , or the bottom valve closed lax dissatisfaction irrigation water , vacuum packing serious leakage, gate or shoot the door closed lax . Remedy : First the pressure up, then pump filled with water , and then boot. Also check whether the tight check valve , piping , fittings without leakage phenomenon , found the leak , after the demolition coated with oil or blending paint in the joints , and tighten the screws. Check the water pump shaft seal rings, such as severe wear should be replaced with new parts. Pipeline leak or leaks. When installing the nut may Undertightening . If the leak is not serious, may leak or leaks in places smear cement, oil or coated with asphalt mixing grout . Temporary repairs can put some wet mud or soft soap. If leaks in the joints , you can use a wrench to tighten the nut , such as severe water must be re disassembly , replace the cracked pipe ; reduce lift, the pump nozzle pressed into underwater 0.5m.

Traffic inadequate answers
This is because : Power Speed ​​is not complete or belt slippage , so the low speed ; axial flow blade mounting angle is too small ; insufficient lift , pipeline or pipeline right-angle bend too long ; Suction high ; foot valve , pipe and partial blockage of the impeller or impeller defects ; severe water outlet pipe . Remedy : Restore the rated speed , remove grease belt , adjust the belt tightness ; adjusted the blade angle to reduce pump installation location, shorten or change the curvature of the pipeline pipeline ; seal leak at the pump , compression packing ; clear the blockage and replacement of the impeller ; replace less drain ring , plug leaks .
Deep well submersible pump no water or a small amount of water
First look at the current time and the usual run of the current differences in how to run the pump at this time . If the usual running time is small ( basically the usual current 2 \ 3 ) , then there impeller wear , head uppermost check valve blockage problems. If the same size and usually current, so that the tube pad leaks, leaking pipe , pump leaks and other problems. If time is running large current than usual , so basically you can determine consumable wear. Also add that the cable if damaged , it is the same with the usual large amount of water , but the current becomes large. Current 3 380V motor is generally 2.2A. As long as these reasons are often deep well pump repair maintenance personnel can check out .

The answer can not be started
Should first check the power supply situation : Header is solid ; switch contacts are tight ; fuse is blown ; equal to the three-phase power supply is missing . If open circuit , poor contact , fuse , phase should identify the reasons and timely repair. Second, check whether the pump itself is mechanical failure , common causes include: packing too tight or debris between the impeller and the pump is stuck and blocked ; shaft , bearings, reducing the drain ring rust live ; shaft severe bending . Remedy : Relax fillers, clear flume ; disassemble the pump to clear debris , rust ; remove the shaft correction or replacement of the pump shaft.

Pump rattling answers
There are several reasons: electric rotor imbalance ; couplings combine bad ; bearing wear bending ; rotating part of the loose parts , broken ; pipe bracket is not strong and other reasons . Respectively, can be taken to adjust , repair , strengthening, straightening , replacement and other ways to deal with .
The above situation is a common cause of pump failure , not all of the reasons , in practice deal with failure , because the actual analysis , should follow the principles of the first outside Houli was not to blind operation .

Pump cavitation answers
Pump cavitation is caused by the vaporization of water , water vapor is called vaporization process of state from liquid transformation. Evaporation of water when the temperature and pressure have a certain relationship , under pressure , the temperature rises to a certain value , the water began to vaporize ; if at a certain temperature , the pressure is reduced to a certain value , the same will vaporize the water , the this pressure is called the vapor pressure of water at that temperature . If the flow process , a partial pressure equal to or lower than the region corresponding to the vapor pressure of water , the water vaporization occurs in the area . After vaporization occurs, the formation of many small gas mixture of steam and bubbles . When the flow of water along with the bubble pressure region from the low pressure zone , the bubbles burst under the action of high pressure , high pressure water to the original flow rate of the space occupied by the bubble forming an impact. Metal surface under water hammer pressure, fatigue and was severely damaged form . So we put bubble formation , development and rupture resulting in material damage by the whole process is called cavitation .

Motive power motor overheating
There are four reasons . One reason for the power aspect : the voltage is high or low in a particular load, if the voltage fluctuation range should cause beyond +10 % to -5 % of rated motor overheating ; supply three-phase voltage asymmetry, the power of three phase voltage unbalance exceeds 5% , will lead the winding overheating ; missing running , experience has shown that agricultural motor was burned over 85 percent are caused due to lack of phase operation , response phase motor protection devices installed . Second, the reason the pump areas: selection of power is not complete, a small horse-drawn carts , motor overload long run , the motor temperature is too high ; starts too frequently , fixed for the short-term or intermittent duty motor continuously. Should limit the number of starts , the correct selection of thermal protection , according to a fixed calibration using the motor . Third is the reason the motor itself : connection error, △ Y- shaped misconnection , the temperature of the motor rises rapidly ; stator winding phase short circuit has , inter-turn short circuit or local ground , light the motor overheating, serious insulation burned ; squirrel broken rotor bars or defective motor run 1-2 hours , core temperature rose rapidly ; ventilation system failure , you should check whether the fan is damaged, the direction of rotation is correct, the ventilation channel is blocked ; bearing wear , rotor eccentric rotor sweep chamber so rub issued with metal core crash, the rapid rise in core temperature , severe motor smoke, even coil burnt. Four aspects of the working environment is the reason : motor winding damp or dust , oil, etc. attached to the windings , resulting in reduced insulation . The insulation resistance should be measured , and for cleaning and drying treatment ; ambient temperature. When the ambient temperature exceeds 35 ℃, inlet air temperature is high, the high temperature causes the motor should seek to improve their working environment. Such as scaffolding shade and so on. Note : Due to the reasons for electrical aspects of the failure occurs, please get professional qualifications electrician maintenance, repair smattering of people can not be blind to prevent personal injury accidents.
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Tel : +86 21 3251 3913    Website : Http://www.yzvacuum.com   Email :info@yzvacuum.com
Addr :ZhenBei Road, Putuo District, Shanghai, No. 915 (Jinshajiang Junction)



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