Double screw pump is a kind of positive displacement rotor pump, which has the characteristics of smooth flow, small pulsating pressure, good self-priming ability, low noise, high efficiency and long service life. Double screw pump will encounter some common faults in the process of using, and these faults will directly affect the production efficiency of double screw pump. At this time, we need to find out the causes of rotor pump faults through troubleshooting, and then find out the relative solutions according to the causes.

The following are the common fault causes and solutions of double screw pump:

Double screw pump does not discharge or discharge too little, may be caused by the following reasons: 1; 2. The pipeline process is complex and the resistance is too large; 3. The device reverses. Solutions: 1. Open the valve and clean up the blocked pipeline; 2. Simplify and shorten the pipeline; 3. Adjust the power wiring of the motor.

The vibration and metal friction sound of double screw pump may be caused by the following reasons: 1 by metal or difficult to break the impact of impurities, resulting in spindle eccentric; 2. Slight screw head deformation caused by impact of metal or hard to break magazine. Troubleshooting: 1. Remove impurities, replace the spindle, repair or adjust the normal position of the gear to ensure no friction of the double screw head. 2. Replace the spindle, repair or adjust the normal position of the gear to ensure that the double screw head has no friction.

The reason why the double screw pump doesn't work suddenly and the shaft disc doesn't move may be as follows: 1. 2. Overload trip or motor burn out caused by too high viscosity of material or too large flow of delivery pump. Troubleshooting: 1. Replace the oil seal; 2. Replace the static and tight ring; 3. Adjust the force on the sealing working face; 4. Replace the sealing ring of mechanical seal or dynamic and static ring.

The material leakage of double screw pump may be caused by the following reasons: 1; 2. The precise oil ring is damaged; 3. Uneven stress on sealing face; 4. Mechanical seal leakage. Troubleshooting: 1. Replace the oil seal; 2. Replace the static seal ring; 3. Adjust the force on the sealing face; 4. Replace the mechanical seal ring or the dynamic and static rings.