Stability Analysis of Hydrodynamic Mechanical Seals in Multifrequency Excitation

The dynamic characteristics of the complex relationship among sealing system, excitation, and response have a considerable impact on operational reliability hydrodynamic mechanical seals, which is critical issue in field theory technology. Scholars at home abroad established models calculated displacement responses static rings time domain based force these so that results can be used for system stability analysis. Neither are excitation cavitation load extracted, nor distance leakage rate analyzed under coupled random excitation. In this study, different operating conditions seal liquid film evaporation seismic applied to study frequency between rate. following conclusions been obtained: Assuming chamber pressure 0.5 MPa spring specific 0.055 MPa, during stable operation, moving stationary 1500 rpm~3000 rpm speeds 1.12 μm~3.05 μm. For medium pressures 0.2 MPa~1.0 spindle rpm, 30 N, Hz, And assumed sinusoidal, 6 fundamental 120 leak 0.1 mL/min~1.3 mL/min. Under multi-frequency coupling, will decrease as cavity increases, increase with rotating speed. speed medium, test value largely consistent theoretical value.