Each pump in use process should be reasonable and maintenance, so that you can extend lifespan, heat pump pump maintenance should pay attention to things: maintenance should be paid attention to when the wiring of the motor don't wrong, otherwise the direction opposite to make ordinary gear pump suction line. The gear pump is specially designed to be reversible, generally not allowed to reverse. This may be due to the non-symmetrical design of the suction, discharge line, or unloading groove, or the unloading path of the relief valve or lubricated bearing which is designed in accordance with the established suction and discharge direction. Heat preservation should keep good for pump and motor, coupling not concentricity ≯ 0.05 mm. As the pump shaft is bent and deformed, it is better to use a grunt connection. Notes: when the pump starts heat pumps are self-priming ability, but the surface of the friction parts before starting must have oil, otherwise not only self-priming ability to drop, and short time of high speed rotary can also according to serious wear and tear. The new heat preservation pump should be filled with oil before the initial use. Slurry pump seal, matters needing attention in the operation of heat pump pump: should not be beyond the rated discharge pressure work, or you will make the prime motor overload, bearing load is overweight, and make the working parts deformation, wear and leakage increase, serious when even cause jam. Precautions in pump use: to prevent inhalation pressure from being too low and inhaling air. When the suction vacuum increases, the amount of gas in the oil increases, and the volume efficiency decreases. Cavitation can occur if the suction vacuum is greater than the suction vacuum. The saturated vapor pressure is low in the working temperature range without light distillate and will not vaporize under normal suction pressure. But the mineral oil is dissolved at ambient temperature and atmospheric pressure at 6% to 12% air. When the pressure is lower than a certain value, the gas that is dissolved in the oil will escape. The pressure is called air separation. It varies with the type of liquid and the amount of dissolved air, and the air separation pressure is high. When the suction pressure is lower than the air separation pressure, the oil will release a lot of bubbles in the low pressure zone to reduce the flow rate. When bubbles with oil to high, the air back into the oil, the formation of partial vacuum, around the high pressure oil will flow through to fill at high speed, a hydraulic impact, and accompanied by severe noise, produce cavitation. Also avoid breathing in the air at work. Inhaling air not only reduces the flow rate, but also makes the insulation pump produce noise. In addition to keeping the suction surface high enough, prevent leakage of the suction pipe. If the heat insulation pump is very noisy, it can be poured oil inspection on each interface of the suction pipe.
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