Common Faults and Countermeasures of High-temperature Gear Pumps (â… ) Symptom: High-temperature gear pump can not discharge the cause of the malfunction: a. The rotation direction is opposite, b. The suction or discharge valve is closed, c. Check if the valve is closed, c. Check the valve and pressure gauge, d. Check the viscosity of the liquid. If the flow rate is low at the low speed, will the flow rate appear? If yes (II) Failure phenomenon: insufficient flow of high temperature gear pump Fault causes: a suction or discharge valve is closed, b inlet pressure is low, c outlet pipe plugging, d filler box leakage, e speed Low countermeasure: a. Check whether the valve is closed, b. Check if the valve is open, c. Check if the discharge volume is normal, d. Tighten and leak a large amount of leakage to affect the production. Rotor speed, (III) Symptom: High temperature gear pump sound abnormalities Causes of failure: a. Coupling eccentric or poor lubrication b. Motor failure, c. Reducer abnormalities, d. Shaft seal installed poor, e shaft deformation or Wear measures: a. Find or fill the grease, b. Check the motor, c. Check Bearing and gear, d. Check the shaft seal, e. Parking disintegration inspection (IV) Symptom: the current is too large Fault causes: a. Outlet pressure is too high, b. Melt viscosity is too large, c. The shaft or bearing wear, e. Motor failure measures: a. Check the downstream equipment and pipelines, b. Viscosity test, c. Check the shaft seal. Appropriate adjustment, d. Check after parking. Check the motor (5) Symptom: Pump suddenly stopped Fault causes: a. Power failure, b motor overload protection, c coupling damage, d outlet pressure is too high. Interlock reaction, e bite abnormal pump, f. Axis and bearing adhesion stuck measures: a. Check the power supply, b. Check the motor, c. Open the safety cover. Disc inspection, d. Check the instrument interlock system, e. . Turn the car to confirm that: The above symptoms and countermeasures are one to one correspondence
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