IMO screw pump It is a kind of pump widely used in various fields. It is characterized by stable pressure, stable flow, low noise and reliable operation. However, there are also some problems in the process of use. Here we will introduce Screw pump Common problems and solutions of.
1、 Difficulty in starting
Loose or slipping drive belt
If the transmission belt is loose or sliding, it will lead to poor oil film wear, increase the starting load of the equipment, and cause difficulty in starting. At this time, it is necessary to adjust the tightness of the drive belt.
Throttle butterfly valve is too small
If the butterfly valve is too small, the pressure difference between the inlet and outlet of the screw pump will be too large after starting, which will increase the load of the pump motor and lead to difficulty in starting. At this time, the butterfly valve with larger diameter needs to be replaced.
Abnormal atmosphere pressure
IMO agent The air leakage during startup is too large, and the air pressure in the air inlet pipe is insufficient, which causes the pump motor to fail to start. At this time, check whether the exhaust port and the installed valve are correct.
Motor fault
If the motor cannot be started or cannot rotate, check whether the motor insulation state, capacitor and power supply voltage are normal.
2、 Temperature too high
Insufficient or turbid lubricating oil
Insufficient lubricating oil or poor oil quality will cause poor lubrication when the pump is running, and the friction of screw pump seals will increase, which will lead to excessive temperature. At this time, the lubricating oil needs to be replaced in time.
Oil passage blocked
The blockage of the oil passage of the screw pump will also cause the pump temperature to be too high. At this time, the problem can be solved by cleaning the oil passage or replacing it with a new one.
Workload too high
If the balance weight is not properly adjusted, the equipment will generate greater load, which is easy to cause excessive wear and deformation of mechanical parts, leading to overheating. At this time, it is necessary to adjust the balance weight to meet the normal working condition.
3、 Vibration and noise
Unstable equipment installation position
The large vibration and noise of screw pump during operation is usually caused by the equipment not being placed firmly in an uncertain position. The pump should be installed on the foundation and isolated from other machines as far as possible.
Mechanical seal failure
The failure of mechanical seal when the pump is running will increase the bubble and impact in the hydraulic system, increase the oscillation degree of the liquid and the noise of the pump operation. At this time, the mechanical seal needs to be replaced or repaired, and the leaking pipeline needs to be repaired in time.
Loose or worn contact parts
If the connecting parts in the pump are loose or worn, the loose parts will vibrate and make noise. At this time, the contact parts need to be reinstalled or replaced.
4、 Oil leakage
Check valve is not fully closed
When the pump stops, the check valve is not fully closed, which will cause the pressure to drop, and the oil flows to the check valve and finally flows out of the pump. At this time, the check valve needs to be repaired or replaced.
Mechanical seal failure
·Mechanical seal failure may also lead to oil leakage of screw pump. Mechanical seal failure may be caused by uneven sealing surface, worn sealing gasket, aging oil seal, etc. At this time, the mechanical seal needs to be replaced.
5、 Abnormal pump flow
Inlet and outlet pipes and defects
If the pump has abnormal flow, first check whether the inlet and outlet pipes are affected by foreign matter blockage or defects. If there is any problem, remove the foreign matter or replace the defective parts in time.
Wear and deformation of mechanical parts
Abnormal flow is found during equipment operation, which may be caused by wear and deformation of mechanical parts. At this time, damaged mechanical parts need to be replaced to ensure normal operation of the machine.
High pressure oil mixed with low pressure oil
If the oil with different pressures in the screw pump oil circuit is mixed, the flow will be abnormal. At this time, it is necessary to thoroughly check the reversing valve to ensure that it is installed correctly, and check whether the high and low pressure oil circuits are connected incorrectly or leaking.
in summary, ALLWEILER screw pump Although there are some common problems, as long as they are checked and solved one by one according to the correct method, the normal operation of the screw pump can be ensured and the smooth production and operation can be ensured.
