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Water Ring Vacuum Pump Pumping Volume Reduction Reasons

In the use of water-ring vacuum pump, if the phenomenon of reducing the pumping capacity occurs, it will directly affect the normal operation. In order to solve the problem quickly, we need to find the reasons for the reduction of the pumping capacity of water-ring vacuum pump. Let's get to know it.


1. Water ring vacuum pump can not reach the rated speed, too large end clearance, filler leakage, insufficient water supply of water ring vacuum pump, liquid ring heating, single-acting pump radial clearance is too large, as well as scale and so on.


2. Excessive end clearance is the most important and common cause of insufficient air volume. If the position of the impeller on the pump body is not inclined, that is to say, the excessive end clearance is not caused by the scratch between the impeller and the side cover, then too many gaskets should be removed.


3. For single-acting pumps, the larger leakage is the radial clearance between impeller wheel load and water ring. If the gap is too large, the air volume will be reduced too much. For this reason, supplementary water can be injected into the pump body or side cover corresponding to the radial clearance to fill the excessive radial clearance. At this time, the pressure of supplementary water should be more than 1.2 kg/cm 2, otherwise it can not enter. These should be considered in design.


4. When using hard water with high hardness, it will cause serious scaling phenomenon of water ring vacuum pump. The scaling on the blade will increase, which will inevitably reduce the effective space, and partly block the suction and exhaust holes, resulting in a reduction in air volume. In order to eliminate the scale of water ring vacuum pump, hard water can be softened and reused. For parts with scale, mechanical method or hydrochloric acid washing method can be used to reduce the impact of scale.


These are the reasons why the pumping capacity of water ring vacuum pump decreases in use. Only after knowing the reasons clearly, can we analyze the causes of the faults. Only in this way can we solve these problems better. In normal use, we should also pay attention to the prevention of accidents.


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