Frictional characteristics of mechanical seals with a laser-textured seal face
Abstract The frictional characteristics of laser-textured mechanical seals with a porous face are investigated. Compared with conventional mechanical seals, the temperature rise, friction torque and friction coefficient of laser-textured mechanical seals with a porous face are much lower. The results show substantial hydrodynamic effects and a better frictional condition between the two seal faces.
Abstract The feasibility of using a silicone rubber membrane to separate mixtures of isopropyl alcohol and water, including the azeotropic composition, has been demonstrated and a quantitative measure of efficiency of separation has been developed. One of the problem areas in studying liquid permeation is the variability in the polymer membrane structure. Such factors as the presence of solvents and plasticizers, previous thermal history, previous solvent history, and the degree of crystallinity of the polymer behavior affect membrane behavior. However, as the polymers are better understood, these drawbacks for the researcher may be of advantage to those tailoring a polymer to a specific use.