How To Solve The Seal Failure of Slurry Pump?

In this paper we will mainly give a solution to slove the slurry pump seal failure problems.

Slurry pump is a common machine to increase the energy of solid-liquid mixed medium by centrifugal force, mainly used in mining, metallurgy, construction and other fields. As a common practical auxiliary tool, three kinds of problems often occur in the use of slurry pump, that is flow instability, cavitation, seal failure, and lead to slurry pump leakage problem. 

In different operating stages, the reasons for seal failure of slurry pump are different, and then we will analyze them one by one.

1.Slurry pump leaks during assembly

Slurry pump in the installation process is prone to problems, generally through static pressure test to observe whether the slag slurry pump leakage, leakage is small, small shift when the moving ring or static ring seal problems, if the leakage is large, is the friction pair of the moving and static ring problems. 

Leaking medium along the axial jet, more for the moving ring seal ring problem, if the leaking medium to the surrounding jet or from the water cooling mouth leakage, then most of the static ring seal ring problems, at this point should be carefully observed, judge the problem and timely adjustment.

2.Slurry pump leakage during test run

After the static pressure test, the cause of slurry pump leakage is generally caused by the friction pair damage of the dynamic and static rings. 

There are many reasons for this phenomenon, generally: cavitation, extraction, pressure and other abnormal phenomena caused by axial force, the installation of sealing compression is too large, moving ring sealing ring or static ring sealing ring too tight or too loose, there are particles in the working medium into the friction pair and other reasons. The main solution is to reassemble and replace the seal.

3.Slurry pump sudden leakage in normal operation 

In this case, a few are due to normal wear and tear or slurry pump to reach the service life, but most are caused by changes in working conditions or improper operation and maintenance. 

The main reasons are: cavitation or a long time to hold pressure, the actual output is too small, sealing cooling water interruption, a long time to stop and restart without turning the vehicle, corrosive in the medium, the increase of the aggregation or cementing substances, the slurry pump operating environment temperature changes dramatically, frequent adjustment of working conditions, etc. 

In the process of using the slurry pump, attention should be paid to the use of specifications, before use must be connected to the shaft seal water, stop the pump after five minutes can be closed, and for a long period of time, before the shutdown, the pump cavity and seal need to be cleaned with clean water, restart the manual turning, to extend the service life of the slurry pump.

Conclusion

Above, we summarized some solutions to seal failure of slurry pump. In order to avoid problems in the use process, the use process of slurry pump should be standardized, and regular inspection should be carried out to find out the causes of abnormal situations and make adjustments in time, so as to ensure the normal use of equipment and the normal operation of the selection plant. You can also consult the professional slurry pump manufacturer to maximize the efficiency of the slurry pump.

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