The water ring vacuum pump can meet certain operating requirements in the process of use, but in the production process, it must be operated in strict accordance with the operating regulations to achieve good results. Now let’s understand the reasons for the backflow of the water ring vacuum pump.
The key to the operation of the water ring vacuum pump equipment is to maintain the recyclability of the internal water ring. Once backflow occurs, the balance of the water ring will be damaged, causing the water ring vacuum pump to fail to work normally. The liquid flow of the water ring vacuum pump is maintained by the energy gradient. When the flow rate drops to near zero, the impeller may increase the circumferential velocity around its inlet due to the effect of the liquid inertia force, which increases the energy near the pipe wall. This makes the energy gradient required for the water ring vacuum pump to maintain the liquid flow along the streamline no longer exist, so the liquid flow near the impeller inlet reverses.
The head of the water ring vacuum pump is constant for the given impeller diameter and flow, while the dynamic head is a function of the flow. At some points on the head flow curve, once the dynamic head exceeds the centrifugal head, the pressure gradient at these points is reversed, resulting in the opposite flow direction of the water ring vacuum pump, which means backflow. The backflow problem of water ring vacuum pump is mainly caused by the fact that the dynamic head exceeds the centrifugal head and the speed of water ring movement exceeds the centrifugal speed that can be controlled by the water ring vacuum pump equipment itself. Therefore, when we actually use the water ring vacuum pump, we should pay attention to the internal water ring movement and adjust it in time to reduce the possibility of backflow.
The above is about the reasons for the backflow of the water ring vacuum pump, which must be operated in strict accordance with the regulations during the operation. If you do not understand, you can call for advice. We are a professional manufacturer and will give you reasonable suggestions.
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