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Abstract:
The transfer regularity of the frictional heating of the end faces of
mechanical seal in the system consist of the rotating ring, the
stationary ring, the fluid film in the end faces and the sealing medium
is investigated. Taking the heat-transfer area as a constant, each ring
can be simplified as an equivalent cylinder. The equations for
calculating the frictional heat transferred by each ring are derived,
and the temperature distribution in seal rings is discussed. The
frictional heat increases both with the increase of the rotational speed
and with the decrease of the average film thickness. Because the most
frictional heat is transferred by the rotating ring into the sealing
medium, the temperature change of the stationary ring is relatively
small. For the rotating ring, the temperature beside the air is higher
than that beside the sealing medium. The end face of the rotating ring
processes the highest temperature and there exists radial temperature
gradient. It is possible to reduce the highest temperature and the
temperature difference between the inner diameter and the outer diameter
by increasing the heat-transfer area or using the material with higher
coefficient of heat conductivity in order to improve the performance of
mechanical seals.
Key words:
Mechanical
seal Heat transfer Frictional heat Coefficient of heat
transfer Temperature field
CLC No: TB42
江苏省“六大人才高峰”资助项目(苏人通[2005]6号).
Received
20051108, received in revised form 20060215
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