Common failures and elimination of hydraulic vane pump in injection molding machine
November 03, 2024
Injection molding machine hydraulic vane pump common cause of failure and exclusion:
Fault Cause / Troubleshooting A. No oil discharge 1. Rotary position fallacy (positive, counterclockwise) immediately stop, more positive motor rotation position.
2. Pump non-rotating motor power is returned, to confirm the coupling or key is corrupted.
3 pump shaft rupture, the rotation of the rotor does not rotate the trim pump to confirm the motor speed is too high, the core is aligned core 4. Suction tube blocked review suction line 5. Inhalation of the oil filter to block the cleaning inhalation of oil filter 6 . The fuel tank filter is replaced by more than enough flow to aspirate the strainer to a maximum of 2.2 times the flow rate per second. 7. The oil is too high to change the viscosity of the oil according to the schedule
8. The number of revolutions is not enough according to the minimum rotational speed of the pump to choose the motor speed (according to the model)
9. Insufficient intake air tightness check suction line 10. Tank filter refueling above oil level to reference point above oil level gauge 11. Vanes should not slip out of spinodger trim pump B. Tone level high 1. Inhalation Pipette too small suction degree of vacuum up to 200mmHg times 2. Inhalation filter block clogged inhalation of oil filter mesh 3. The fuel tank filter more than the replacement of more suction oil filter network, up to 2.2 times the flow of the pump per second above 4 Oils too high Replacement procedures for oil viscosity (based on die)
5. Duplex pump suction tube error correction piping 6. Inhalation pipe suction air lock pump suction flange and check the other suction pipe is locked 7. Shaft seal at inhalation atmosphere check whether the center of the shaft 8 . The oil tank bubble back to the oil pipeline configuration and length of the deformity 9. Tank filter on the oil above the oil level meter above the reference point 10. The blade shall not slide out of the spinodger trimming the pump 11. Couplings Replace the music replacement coupling and check the shaft is homogeneous 12. The fuel tank air filter is clogged or the specification is too small Clean the air filter or replace the filter of the appropriate specifications 13. High speed of rotation According to the pump regulations the maximum speed of rotation Motor selection Slew speed (based on die)
14. Set the pressure is too high to examine the pressure gauge is set to deformity 15. pump bearing more pump and check the shaft is homogeneous 16. Cam ring wear abnormal wear Department of dirty oil is too dirty.
17. Poorly tightened pump cover Remove the pump from the torque wrench again 18. Significant wear and tear on the pump (cam ring, knob, manifold, vanes) Dirty oil, dirty pump and hydraulic fluid C. Excess flow 1. No Oil discharge reference A form of solution 2. Inhalation of the vacuum is too large, due to inhalation of air lead to cavitation erosion Scene inspection Suction filter, heavy use of hose or straight pipe 3. Rotor, manifold wear trim pump 4. Pump tight tightening Torque wrench and then remove the pump 5. The oil is too low Replace the oil, install the ice maker D gasket Oil leak gasket replacement gasket
