In fact, for multi-stage centrifugal explosion-proof pumps, when the model of the multi-stage centrifugal explosion-proof pump is determined, the power consumption is proportional to the actual flow of the multi-pump. The flow of the multi-stage centrifugal explosion-proof pump will decrease with the increase of the head, so the higher the head, the smaller the flow, and the lower the power consumption. Conversely, the lower the head, the greater the flow, and the greater the power consumed. Let's talk about the relationship between the head and the shot height of the multistage centrifugal explosion-proof pump.
The relationship between the head and the shot height of the multistage centrifugal explosion-proof pump
Multi-stage centrifugal explosion-proof pump Current=head*flow. First, the height of the head is determined by the energy loss of the pipes and valves to the water. He means the energy value that the pump can give to the water. Of course, the motor speed drops and the head also drops
When the outlet valve of the multi-stage centrifugal explosion-proof pump is closed, because the head remains unchanged and the flow decreases, the current of the pump decreases. If it is fully closed, the current is the smallest, but it is slightly larger than idling, because water has resistance.
When the current of the multi-stage centrifugal explosion-proof pump is the smallest, it is idling, that is, there is no water in the pump body, and it is directly connected to the atmosphere, and the pump wheel is idling. [Of course, the submersible pump will cause overheating and damage even if it is ordinary The pump does not work well in this way.
When the current of the multi-stage centrifugal explosion-proof pump is the largest, it is when the inlet is connected to the source, such as water, and the outlet is not restricted, such as directly connected to the atmosphere without connecting the pipeline. At this time, the flow rate is the largest, and the pump current will be the largest. .
However, for the pumps of general manufacturers, the matching motors are calculated according to the rated flow. If there is no restriction like this, it may cause the motor to be overloaded and burned, but the big manufacturers are different. They usually match according to the maximum limit. Even if the motor is not restricted, the efficiency is not high at most, but the pump will not be damaged.
