| 摘要 |
A mechanical end face seal of the non-contacting type includes a primary sea l ring having a back section, a seal face section and a middle section between the seal face and the back sections, each primary ring section having a radial dimension, defined as the difference between the outermost radius and the innermost radius of said respective section, the radial dimension of the back section being in a ratio relative to said middle secti on of between about 1.5 to about 3.1, and more preferably of between about 1.9 to about 2. 5, and most preferably about 2.0 to about 2.3. Additionally, the mating seal ring includ es grooves extending from one seal ring circumference toward the other and terminating adjacent a dam at a radius R g, it is beneficial to have the boundary between the grooves a nd the dam have a radius R g slightly larger or smaller, within about 10%, than the outer radi us of the middle section.
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