Brief analysis the causes of mechanical seal leakage suddly for centrifugal pumps
Centrifugal
pump in the process of operation, by reason of mechanical seal aging and wear,
and appear sudden leakage is very rare.More cases, centrifugal pump mechanical
seal was caused by workers improper operation, maintenance, or working
conditions change occurs sudden leakage around.
The
causes for the leakage of centrifugal pump with mechanical seal suddenly:
1.Centrifugal pump seal longer
pressure-out, is subject to a certain degree of damage, likely leak
problem.Centrifugal pump fit and the root cause of the corrosion is also
similar to leak problem.
2.The failure of mechanical seal also may be due
to the small centrifugal pump's actual output, and makes a lot of liquid medium
cycle makes a dramatic rise in the temperature within a centrifugal pump, and
then vaporize liquid medium, caused by the failure of mechanical seal.
3.The centrifugal pump back flow is big can cause
the damage of the mechanical seal.Centrifugal pump flow back more than expected
value, will bring up the sediment of suction side at the bottom of the
container, after sediment into the centrifugal pump damage mechanical seal,
causing them to leak.
4.If a centrifugal pump is not in the running
state for a long time, start again without using manual turning, as a result of
the mechanical seal friction pair of adhesion is also one of the sealing
surface damage causes of mechanical seal.
5.The material of mechanical seal and poor
compatibility between working medium, medium corrosive, polymerized or glue sex
is strong, also can damage the sealing surface of mechanical seal, cause
leakage.
6.Mechanical seal working environment temperature
changes too fast, the working condition of too frequent and sudden stop will
cause the leakage.
Sudden failure in operation of mechanical seal of
centrifugal pump and leakage will cause greater damage to machinery and
equipment, and even cause safety accidents, so keep regular inspection on
centrifugal pump mechanical seal, and ensure the correct operation, to take
effective measures to reduce the above case.
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