As a common fluid transmission equipment, screw pump is widely used in industrial fields. In actual operation, when the screw pump does not rotate, the first thing to consider is whether the power supply is normal. The following details how to confirm whether the power supply is normal when the screw pump is not rotating.

First，check the power line

        First of all, check whether the power line of the screw pump is properly connected. This includes checking whether the power plug is plugged in, whether the power cord is broken or damaged, and whether the power outlet is working properly. At the same time, it is also necessary to confirm whether the connection between the power line and the screw pump is tight and there is no loosening. If it is found that the line is damaged or loose, it should be replaced or tightened in time.

Second，measure the power supply voltage

        After the power cable is properly connected, use a tool such as a multimeter to measure the power voltage. According to the rated voltage of the screw pump, select the appropriate range to measure the voltage value of the power socket. Generally speaking, the power supply voltage should fluctuate within the range of ±10% of the rated voltage, if beyond this range, it may be the power supply voltage instability caused by the screw pump does not rotate.

Third，check the power switch and fuse

        Next, check whether the power switch of the screw pump is on and whether the fuse is blown. The power switch is the key component to control the power supply of the screw pump. If it is in the closed state, it can not provide power for the screw pump. The fuse is an important component to protect the safety of the circuit, if the fuse is blown, it will also lead to the screw pump can not work normally. Therefore, when confirming whether the power supply is normal, it is necessary to pay attention to the status of these two components.

Fourth， Observe the power indicator

        Many screw pumps are equipped with a power indicator to indicate whether the power is on. When the screw pump does not rotate, you can observe whether the power indicator light is on. If the indicator light is not on, there may be a problem with the power supply; If the indicator light is on, but the screw pump still does not turn, it may be caused by other faults.

Fifth，comprehensive judgment and investigation

        Through the inspection and measurement of the above steps, it can be preliminarily determined whether the power supply is normal when the screw pump does not rotate. If the power line, voltage, switch and fuse are normal, but the screw pump still does not rotate, it may be the screw pump itself is faulty, need to further investigate other possible causes.

        Confirming whether the power supply is normal when the screw pump is not rotating is a systematic process that needs to be checked and measured from many aspects such as power lines, voltages, switches and fuses. Only by ensuring that the power supply is normal, can we further investigate other reasons that may cause the screw pump to not rotate and ensure the normal operation of the equipment.

Key words: How to deal with the screw pump when it does not rotate, how to judge whether the power supply is normal when the screw pump does not rotate