Affiliation:
1. AGH University of Science and Technology, Faculty of Mechanical Engineering and Robotics
Abstract
Magnetic fluid seals are used in many applications, primarily in gas and vacuum environments. The unique
properties of this type of seal are very low torque friction, high tightness, and almost unlimited durability.
These parameters are also expected for seals that operate in a water environment. This article presents the
results of a magnetic fluid seal's maximum (critical) velocity operating in a water environment. The scope of
the investigation included an analysis of parameters such as the pressure of the sealed water and the properties
of the magnetic fluid. Two independent parameters, such as the pressure change and the torque change of the
seal, were used to determine the leakage. The results showed that the best performance was obtained for the
fluid with the lowest dynamic viscosity. In addition, the water pressure had a significant effect. Furthermore,
pressure change has been shown to be a better indicator of leakage occurrence at high speeds than measuring
torque. The results indicate a different leakage mechanism at low and high pressures.