An Experimental and Analytical Investigation of a Radial Face Seal.

摘要

A complete description concerning the interface region of a parallel radial face seal has been conducted both experimentally and analytically. Analytical predictions stem from a FORTRAN IV computer program designed such that density and viscosity variation with temperature can be simulated. The equations of motion were solved on an incremental basis to yield a 'closed form, finite difference' solution. For comparison purposes, predictions assuming non-temperature dependent fluid properties are also given. Experimentally determined parameters include vertical load, torque, interface pressures, and temperatures, while interface clearance, supply pressure, and rotational speed were externally set parameters affecting seal performance. Unlike most other investigators, the test seal was rigidly mounted and both surfaces were constructed of stainless steel. Numerically predicted temperature dependent and non-temperature dependent fluid property pressure profiles deviate substantially when fluid temperature rise becomes significant; thus decreasing the load carrying capacity of the seal. Predictions involving a temperature-dependent fluid indicate higher leakage rates and lower torque values when compared to predictions assuming a non-temperature dependent fluid. Experimental testing was carried out under several sealing conditions.