NACHI gear pump common fault and maintenance methods
Bottle Jack
The bottle jack is one of the oldest and most familiar pieces of hydraulic equipment.
This familiarity contributes to misuse which can lead to personal injury. The bottle jack
is a load lifting device and should never be used as a load holding device, especially
when a person will be going underneath the supported load.
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Countermeasures: a, confirm the direction of rotation; b, confirm the valve is closed; c, check the valve and pressure gauge; d, check the liquid viscosity, low speed operation according to the speed ratio of the flow rate appears, if the flow, then the inflow.
(2) Symptom: Insufficient flow rate of the gear pump. Cause of the malfunction: a. The suction or discharge valve is closed. B. The inlet pressure is low. C. The outlet pipe is blocked. D) The filler box is leaking.
Countermeasures: a, confirm whether the valve is closed; b, check the valve is open; c, confirm the discharge volume is normal; d, tighten; a large number of leaks affect production, should stop running, disassembly inspection; .
(3) Symptom: abnormal sound failure reasons: a, coupling eccentric or poor lubrication; b, motor failure; c, reducer abnormalities; d, shaft seal at the installation of bad; e, the shaft deformation or wear.
Countermeasures: a or find filling grease; b, check the motor; c, check the bearings and gears; d, check the shaft seal; e, parking disintegration inspection.
(4) Fault phenomenon: the current is too large Fault causes: a, the outlet pressure is too high; b, the melt viscosity is too large; c, shaft seal assembly bad; d, shaft or bearing wear; e, motor failure measures: a, check The downstream equipment and pipelines; b, test the viscosity; c, check the shaft seal, appropriate adjustments; d, check after parking, hand crank car is overweight; e, check the motor (5) Symptom: gear pump suddenly stopped Fault reason: a, power failure; b, motor overload protection; c, coupling damage; d, the outlet pressure is too high, interlocking reaction; e, bite abnormal pump; f, stuck with the shaft and bearing stuck.
Countermeasures: a, check the power; b, check the motor; c, open the safety cover, disk inspection; d, check the instrument interlock system; e, parking, reversing confirmation;
