Submersible electric pump maintenance

Electrical ( 1) Regularly review the operation of the submersible electric pump voltage and direct current (dc). Three-phase voltage is measured with a hydraulic pressure gauge should be the ultimate unification, and in 340 ~ 420 v, three-phase direct current is measured with a clip-on dc meters should be the ultimate unification, and 0. Additional direct current (dc) of 5 ~ 1 times. ( 2) Periodic review of the submersible pump hot insulation resistance. Run back in deformity after 4 ~ 6 h, downtime to motor winding is measured with a megger insulation resistance should be > 0. 5MΩ。 Submersible pumps about short time stopped, do that also should review before using. ( 3) To review before starting the acuity degree of thermal relay and the rest of the cover installation work whether deformities. ( 4) Review the cable with and without damage. About oil-immersed submersible pumps, watch for electric pump to the destruction of the cable insulation rubber oil leakage. Mechanical ( 1) Review the submersible electric pump mechanical seal. Opened the oil hole screw, release a large number of oil, such as oil containing moisture, is marked on the grinding block ( Or next grinding block) Seal has ooze water, should change the seal box and exit the new freezing oil. Such as the oil hole in the lack of oil is not good, or should fill up ( 5 or 10 machine oil, sewing or transformer oil) Or replace the new oil. ( 2) Submersible pump for new or replacement grinding block, using 50 h should fade water sealing plug, after review oil ( Water) According to quantity, & lt; 5 ml indicate the sealing deformity, if can be use in place of > 5 ml, the oil ( Water) Put dry after tighten the sealing plug, succeeded after using 50 h for review for the second time, then still > 5 m1, indicate that there is something wrong with the seal. About the use of submersible pumps, to review every month according to quantity, should be < 25 ml, put dry after use. ( 3) The status of the review of the vibration of the pump motor synchronous speed to n0 = 3000 r/min, 1500 r/min and 1000 r/min and 750 r/min motor, our vibration value corresponding to the delta is 0 or less separation. 06mm、0. 1毫米,0。 13毫米,0。 16mm。 ( 4) Regularly review the submersible electric pump bearing condition. Whether the bearing oil shortage, whether to have the status of the running inner ring or outer ring, bearing whether to replace ( About the water filling type electric water pump bearing best annual turnover once) 。 The rest of the above ( 1) Review of submersible electric pump into the water to cover are of weeds dirt block, impeller are intertwined. ( 2) Short time don't have to be submersible pumps, should put forward the port side, cleaning after dry, dry standing on the leak of the indoor storage. ( 3) Submersible pumps running 1 ~ 2 years later, continue to core pulling motor inspection and cleaning. If you have defiled, immerse motor is 0. The TX - 2% of the sea 10 or 105 soap powder in the solution and heated to 100 ℃ or so and mixed solution to slow filth, melting, after 1 ~ 2 h filthy clear the water with low pressure water enhancement dirty armor again net, furnace high temperature drying. Motor rotor winding rewind ( 1) To prevent or reduce to remove errors spinor rotation insensitive, the assembly machine, and base on the before and after the end of commissure with a child playing on storage symbol, after finishing as is removed. ( 2) Winding down, watch for good core cover, prevent the silicon cocking, shift, tooth Angle groove burr and so on scene. Better remove the step is: with diagonal cutting pliers first from the head end shearing bolt circle, and then at the other end with forceps. ( 3) According to our the size of the winding coil winding mould, in order to ensure winding end clearance and coil embedded groove outward. ( 4) Embedded line adopt 'three three-dimensional method', namely embedded good phase and then embedded in another phase, makes the end constitute a 'three layers of three-dimensional' : embedded put watch: (1) the first two 'hanging' coil position to appropriate, to ensure embedded as the rest of the coil not blow rub rotor iron core; Use less (2) the bottom line of the lap line board, lest destroy the coil insulation; (3) and insulating paper to put in place, two broad phase coil to leave; (4) of oil-immersed and water filling machine, slot coil ( From the end) , make the oil (compaction) Water) Can be fixed for winding heat dissipation. ( 5) To solve the good insulation joint. Strip of sheath and joint coating and expelling copper wire in the name of paint layer and oxide layer; And then splicing continue to soldering, residual welding and cutting edges, burrs and abolish the liquid; Then half fold pack 2 layer, with polyethylene belt with stretching about 2 times of butyl adhesive belt half fold package 6 layer ( Be careful no gaps) joint , initially with polyethylene tape or polyester adhesive tape and a half fold as mechanical screen pack 2 layer. ( 6) Remove the maintain dirty. Carefully adjusted at the bottom of the screw 'limit', make the spinor rotation, and will lock nut and tighten. According to the intact status mount end cover, be careful not to corrupt seal box inner hole rubber sealing ring. Tong postures disassembled only slightly into the seal box, beating). Try to remove the good motor ( 1) Air pressure to try. The pressure of the 2 kg/was to review the machine check mouth with the 'O' type rubber sealing ring and postures seal box of two close cover is breathable, airtight in high and low cover after adding machine oil. ( 2) Dc resistance. Each phase winding rotor resistance should be evenly in three-phase winding resistance value of the size of error of plus or minus 2%. ( 3) Insulation resistance. Should be > 5 m Ω at room temperature. ( 4) Mechanical review. Electric pump is running, the tones of components should deformities. ( 5) Carrier to try. Additional voltages of the shipboard dc with onboard lose money with the original motor. With 2. 2 kw submersible pumps, shipboard dc to 1. 8 ~ 2. 5 a, shipboard lose money < 0. 5千瓦。 ( 6) Attempt to load. In the water running after 4 h, the motor temperature 75 ℃ or less. ( 7) Brake to try. To insert the impeller live, 100 v switching power supply, three-phase direct current in each phase dc value should uniform values within the scale of error of plus or minus 10%.
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