Self-priming pump inlet pressure is too high, leading to mechanical seal leakage

recently zhejiang east constant petrochemical use my company's strong self-priming pump customers reflect the mechanical seal leakage after replacement of new mechanical seal leakage can not find out the specific reasons, my company technical personnel to the scene found the site condition, self-priming pump inlet pressure and 1 after stop working. 2 kg, self-priming pump doesn't work when will leakage, the oil pump inlet pressure line, after removing the self-priming pump mechanical seal is leakproof, no liquid leakage after is up and running, the conclusion that machine seal leakage belong to the inlet pressure. Import pressure condition with a centrifugal pump can meet the requirements is not necessary to choose the self-priming pump, so it is important to note that the model selection of the customer problems. Self-priming pump common failures and repair self-priming pump motor part 1, after turning on the power supply. Most of power plug, leads for power supply and motor windings caused by short circuit. 2, difficult to start or can't start, and accompanied by & other; Buzz throughout the &; The voice. Available maintenance small bamboo piece according to the direction of running fast moving blades, if the motor is running quickly, that is to start or start winding damage, should replace or repair the startup winding of the same capacity; If electric hairpin, most of them are mechanical failure of motor and pump head, such as bearing damage, such as impeller jammed. 3, the motor can run, but speed is slow, and chassis overheating and burning smell. Most is caused by the motor winding short circuit, the motor should be apart, according to the condition of damage with welding, jumper, isolation, rewind and other measures to repair. 4, noise, vibration during operation. Most is bearing damage or bearing and chassis mismatch, need to open motor to check, and if the bearing damage should be replaced; If bearing outside running round, but the pump shell of mating surface using flower; If the bearing runs within the circle, but on the motor shaft wear and tear parts adopt flower processing, serious wear and tear, and adopt the method of surfacing welding before turning to repair. Self-priming water pump pump head part 1, motor functioning but water yield little or no water. This kind of situation should first check the pump seal, should be first unplug the power plug, check by hand to block water inlet, the water pump filling water, living in his mouth exports in blowing hard and observe whether the pump head is leaking, the leak is also seal damage. Common fault parts are water inlet, outlet pad, impeller cover pad, maintenance should be replaced. Without full water phenomenon, more is the damage of impeller, suction room and water room between retaining water inside the insulation erosion wear, at the pump head water retaining smooth, increase the clearance between the impeller and pump casing, impeller and the pump shell should be changed. Should be paid attention to when possible replacement wheel completely clean the residual copper in pump blades, in order to avoid damage once the new impeller. 2, chassis charge. Most water seal is damaged, infiltration of water through the motor shaft in worsen electrical insulation, motor can be used to replace water seal, drying methods such as motor repair. It is important to note that because the long-term contact with water pump and the outdoor work, easy to be affected with damp be affected with damp and cause deterioration of insulation performance, in order to ensure the personal safety, electric self-priming centrifugal pump should be reliable grounding.

related production often supplies: strong self-priming pump, self-priming pump household

related articles: self-priming pump suction Cheng Wenzhang keywords: self-priming water pump inlet pressure is too high, self-priming pump mechanical seal leakage and pump mechanical seal leakage

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