Common faults and countermeasures of high-pressure gear pump during operation

Common faults and countermeasures for high-pressure gear pump operation are as follows:
(1)
Fault phenomenon: high pressure gear pump stops suddenly
   
cause of issue:

a , power outage;

b , motor overload protection;

c , the coupling is damaged;

d , the outlet pressure is too high, interlocking reaction;

e , the pump bite abnormal;

f , the shaft and the bearing stick and stick.
   
Responses:

a , check the power supply;

b , check the motor;

c , open the safety cover, check the car;

d , check the instrument interlock system;

e , after parking, positive reversal confirmation;

f , confirm the car.
(2)
Fault phenomenon: abnormal sound when the high-pressure gear pump is running
   
cause of issue:

a , the coupling is eccentric or poorly lubricated

b , motor failure;

c , the gearbox is abnormal;

d , poor installation of the shaft seal;

e , the shaft is deformed or worn.
   
Responses:

a , align or fill the grease;

b , check the motor;

c , check bearings and gears;

d , check the shaft seal;

e , parking disassembly check.
(3)
Fault phenomenon: high pressure gear pump can not discharge
   
cause of issue:

a , the direction of rotation is opposite;

b , the suction or discharge valve is closed;

c , the inlet is not material or the pressure is too low;

d , the viscosity is too high, the high pressure gear pump can not bite.
   
Responses:

a , confirm the direction of rotation;

b , confirm whether the valve is closed;

c , check the valve and pressure gauge;

d . Check the viscosity of the liquid. If the flow rate is proportional to the speed at low speed, if there is flow, the flow will be insufficient.
(4)
Fault phenomenon: insufficient flow of high pressure gear pump
   
The cause of the failure: a , the suction or discharge valve is closed; b , the inlet pressure is low; c , the outlet line is blocked; d , the stuffing box leaks; e , the speed is too low.
   
Countermeasures: a , confirm whether the valve is closed; b , check whether the valve is open; c , confirm whether the discharge is normal; d , tightening; when a large number of leaks affect production, stop operation, disassembly inspection; e , check the actual pump shaft Rotating speed.
(5)
Fault phenomenon: high voltage gear pump current is too large
   
The cause of the failure: a , the outlet pressure is too high; b , the melt viscosity is too large; c , the shaft package is poorly fitted; d , the shaft or bearing is worn; e , the motor is faulty.
   
Countermeasures: a , check downstream equipment and pipelines; b , check viscosity; c , check shaft seals, adjust properly; d , check after parking, whether the hand truck is too heavy; e , check the motor.

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