First, to improve the service life of high-temperature gear pump measures 1) due to high temperature gear pump body operating at high temperatures, so cold installation piping should be set Hinge, to prevent the displacement pipe after warming. 2) The coupling must be heat-corrected after the pump is warmed to avoid additional torque during operation. 3) CQB-G high temperature magnetic pump outlet pressure measuring point to be set to stop interlocking alarm, otherwise, once the discharge pipe is blocked, Botou gear pump, easy to cause damage to the pump. 4) high temperature gear pump precautions, no pressure in the export formation, can not be blindly speed, to prevent premature failure of the shaft or bearing. 5) When cleaning pipetting, do not pump cleaning fluid, should be removed inside the pipette, and then install after the end of pipetting so as to avoid foreign matter in the pump. 6) The temperature of the pump heat medium jacket can be slightly lower than the heat medium temperature of the jacket tube. Because the melt viscosity and shear rate as a decreasing function, the gear extrusion, bearing shear will make the melt temperature rise after the pump 3 ~ 5 ℃, reduce the heat medium temperature to prevent the melt degradation. Data show that by reducing the bearing zone temperature can greatly increase bearing capacity, do not need to replace the large-capacity pump, just by increasing the speed can be used gear pump output capacity increased by 50%. 7) speed to be slow, do not make the sharp rise in pressure before and after, in order to avoid damage to the bearing or melt block the lubrication channel. 8) High-temperature gear pump outlet after the melt filter to be replaced on a regular basis, do not long-term high pressure and pressure limit to run. 9) Regular replacement of bearings can save maintenance costs. When it is found that the amount of wear on the inner surface of the shaft or bearing is close to the thickness of the hardened layer, the shaft can be polished and reused, replacing only the bearing. This prolongs the life of the shaft by 8 to 10 years. 10) In case of power failure or heat medium cycle interruption more than 3Omin, the pump should be disassembled and cleaned before reassembly, to avoid melt curing) cracking caused by poor bearing lubrication and high temperature pump damage. Second, high temperature gear pump routine maintenance operation and management (1) high temperature gear pump disassembly and cleaning, heating and cooling, starting and stopping should be strictly in accordance with the provisions of the operation to avoid unnecessary losses. (2) Care should be taken to maintain the pressure at the inlet of the booster pump steady, allowing it to have a consistent volumetric efficiency that is conducive to pump operation and the stability of downstream spinning quality. (3) The population is negative pressure of the packing shaft seal pump, packing should be kept at a pressure higher than the atmospheric pressure. When the back pressure is reduced, the pressure of the stuffing box should be adjusted in time, otherwise the pump will be sucked into the air, causing the belt strip to break. The high temperature gear pump will affect the pelletizing and lead to the discharge of the pelletizer. (4) should always check the temperature of the heat medium jacket, the main body and front) back cover of the heat medium temperature to be consistent. (5) Each time the output increases, the current output) speed) out) the inlet pressure) current value recorded, and before and after the data to be compared, careful analysis, in order to detect anomalies as soon as possible, in a timely manner.
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