Water pump is drought-resistant agricultural production machinery, is also an important equipment used in rural areas. Choose and maintain a good pump, agricultural production is an important guarantee for the smooth progress.
First, the choice of pump models
Many types of agricultural pumps, in the selection need to pay special attention to understand the meaning of the model and code, so that the correct choice. For example: wb40-40-150 (550b), wb on behalf of the micro-centrifugal pump, before and after the 40 on behalf of the inlet and outlet diameter, mm; 105 on behalf of the blade diameter, mm; 550 on behalf of the motor power, b; The 150s-50 type, s represents a single-stage double-suction horizontal centrifugal pump, 150 on behalf of the inlet diameter, mm; 50 on behalf of the head, m. Farmers need to choose according to their own pump models.
Second, the preparation before use
1) Check all parts of the bolt is complete, with or without loosening;
2) Check whether the power machine is safe and effective;
3) check the cooling water, lubricants, etc. are missing, whether the normal operation;
4) Check the line set up, the connection is in line with safety requirements, to prevent electric shock accidents.
5) Check whether the unit power is matched, whether the installation is firm;
6) Check whether the transmission connection between the power unit and the pump is normal, safe and reliable, and whether the connection parts of the drive are equipped with safety protection facilities such as protective plate and protective net, so as to avoid dangerous accidents.
Third, the common faults and exclusion
1. Can not start
Reason: ① check the power supply; ② joint connection is solid; ③ switch contact is tight; ④ fuse is blown; ⑤ three-phase power supply is missing; ⑥ check whether the pump's own mechanical failure.
Exclude: ① relax packing, clear the diversion tank; ② open the pump to remove debris, rust; ③ remove the pump shaft correction or replacement of the new pump shaft.
2. The motor overheats
(2) selection of power is not complete, the motor overload operation for a long time; (3) start too often, the fixed amount of short-time or intermittent work of the motor system for the continuous (2) the power supply voltage is too high or low, Work; ④ connection error, the △ -shaped into y-shaped form; ⑤ stator windings with short-circuit, inter-turn short circuit or local grounding; ⑥ squirrel cage rotor bar or defective; ⑦ motor winding damp or dust, On the windings, the insulation is reduced.
When the ambient temperature is higher than 35 ℃, the temperature of the motor will be too high. Try to improve the work environment, such as shade shade, etc .. If the temperature is too high, the motor temperature is too high.
3. Water pump heats up
The bearing is damaged; Roller bearing or bracket cover gap is too small; Pump shaft bending or two axes are not the same; The tape is too tight; The lack of oil or oil quality; The impeller balance hole blockage, the impeller is lost balance.
(3) investigate the pump shaft or adjust the concentricity of the two axes; (4) adjust the tightness of the tape tightly; (5) fill the clean (2) to remove the bearing; (2) Butter, butter accounted for about 60% of the bearing space; ⑥ eliminate the balance hole blocking material.
4. Insufficient traffic
Reason: ① power speed is not matching or belt skid, so that the speed is low; ② axial flow pump blade installation angle is too small; ③ head is not enough, the pipeline is too long or the pipe has a right angle; ④ suction is high; , Pipe and impeller partial impeller or impeller defects; ⑥ water leakage serious.
Reduce the pump installation position, shorten the pipeline or change the curve of the pipeline; ② sealing pump leakage Department, pressing the packing; to remove the oil pressure, reduce the speed of the pump, Remove the plug, replace the impeller; replace the leak ring, plug the leak.
5. Suction is not on the water
Reason: the pump body with air or into the water pipe gas, or the bottom valve closed lax irrigation water dissatisfaction, vacuum pump packing serious leaks, gate valve or shutter door closed lax.
Remedy: ① first up the water pressure, and then pump the body filled with water, and then boot. ② Check the check valve is tight, pipeline, joint with or without leakage phenomenon. ③ Check the oil pump shaft seal ring, such as serious wear and tear should be replaced with new pieces. ④ pipe leakage or leakage, may not be tight when tightening the nut installed, if the leakage is not serious, in the leak or leaking place smearing cement, or coated with asphalt oil mixing slurry; If the joints in the water leakage , Can be wrench tighten the nut; if the leakage is serious, must be re-installed, replace the cracked tube. ⑤ reduce the head, the nozzle of the pump pressure into the water 0.5m.
6. Severe shock
Reason: ① electric rotor unbalance; ② coupling with poor; ③ bearing wear bending; ④ part of the rotating parts of the loose, broken; ⑤ pipeline support is not strong and other reasons.
Exclusion methods: can be taken to adjust, repair, reinforcement, alignment, replacement and other methods to deal with.
First, the choice of pump models
Many types of agricultural pumps, in the selection need to pay special attention to understand the meaning of the model and code, so that the correct choice. For example: wb40-40-150 (550b), wb on behalf of the micro-centrifugal pump, before and after the 40 on behalf of the inlet and outlet diameter, mm; 105 on behalf of the blade diameter, mm; 550 on behalf of the motor power, b; The 150s-50 type, s represents a single-stage double-suction horizontal centrifugal pump, 150 on behalf of the inlet diameter, mm; 50 on behalf of the head, m. Farmers need to choose according to their own pump models.
Second, the preparation before use
1) Check all parts of the bolt is complete, with or without loosening;
2) Check whether the power machine is safe and effective;
3) check the cooling water, lubricants, etc. are missing, whether the normal operation;
4) Check the line set up, the connection is in line with safety requirements, to prevent electric shock accidents.
5) Check whether the unit power is matched, whether the installation is firm;
6) Check whether the transmission connection between the power unit and the pump is normal, safe and reliable, and whether the connection parts of the drive are equipped with safety protection facilities such as protective plate and protective net, so as to avoid dangerous accidents.
Third, the common faults and exclusion
1. Can not start
Reason: ① check the power supply; ② joint connection is solid; ③ switch contact is tight; ④ fuse is blown; ⑤ three-phase power supply is missing; ⑥ check whether the pump's own mechanical failure.
Exclude: ① relax packing, clear the diversion tank; ② open the pump to remove debris, rust; ③ remove the pump shaft correction or replacement of the new pump shaft.
2. The motor overheats
(2) selection of power is not complete, the motor overload operation for a long time; (3) start too often, the fixed amount of short-time or intermittent work of the motor system for the continuous (2) the power supply voltage is too high or low, Work; ④ connection error, the △ -shaped into y-shaped form; ⑤ stator windings with short-circuit, inter-turn short circuit or local grounding; ⑥ squirrel cage rotor bar or defective; ⑦ motor winding damp or dust, On the windings, the insulation is reduced.
When the ambient temperature is higher than 35 ℃, the temperature of the motor will be too high. Try to improve the work environment, such as shade shade, etc .. If the temperature is too high, the motor temperature is too high.
3. Water pump heats up
The bearing is damaged; Roller bearing or bracket cover gap is too small; Pump shaft bending or two axes are not the same; The tape is too tight; The lack of oil or oil quality; The impeller balance hole blockage, the impeller is lost balance.
(3) investigate the pump shaft or adjust the concentricity of the two axes; (4) adjust the tightness of the tape tightly; (5) fill the clean (2) to remove the bearing; (2) Butter, butter accounted for about 60% of the bearing space; ⑥ eliminate the balance hole blocking material.
4. Insufficient traffic
Reason: ① power speed is not matching or belt skid, so that the speed is low; ② axial flow pump blade installation angle is too small; ③ head is not enough, the pipeline is too long or the pipe has a right angle; ④ suction is high; , Pipe and impeller partial impeller or impeller defects; ⑥ water leakage serious.
Reduce the pump installation position, shorten the pipeline or change the curve of the pipeline; ② sealing pump leakage Department, pressing the packing; to remove the oil pressure, reduce the speed of the pump, Remove the plug, replace the impeller; replace the leak ring, plug the leak.
5. Suction is not on the water
Reason: the pump body with air or into the water pipe gas, or the bottom valve closed lax irrigation water dissatisfaction, vacuum pump packing serious leaks, gate valve or shutter door closed lax.
Remedy: ① first up the water pressure, and then pump the body filled with water, and then boot. ② Check the check valve is tight, pipeline, joint with or without leakage phenomenon. ③ Check the oil pump shaft seal ring, such as serious wear and tear should be replaced with new pieces. ④ pipe leakage or leakage, may not be tight when tightening the nut installed, if the leakage is not serious, in the leak or leaking place smearing cement, or coated with asphalt oil mixing slurry; If the joints in the water leakage , Can be wrench tighten the nut; if the leakage is serious, must be re-installed, replace the cracked tube. ⑤ reduce the head, the nozzle of the pump pressure into the water 0.5m.
6. Severe shock
Reason: ① electric rotor unbalance; ② coupling with poor; ③ bearing wear bending; ④ part of the rotating parts of the loose, broken; ⑤ pipeline support is not strong and other reasons.
Exclusion methods: can be taken to adjust, repair, reinforcement, alignment, replacement and other methods to deal with.
Manufacturers recommend: Shenlong stainless steel fountain submersible pump
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