Adaptive control system for mechanical seal

Details Adaptive control system for mechanical seal Adaptive control system for mechanical seal

F - Mech Eng,Light,Heat,Weapons

16

J

341/106, 277/2

F16J 15/34 (2006.01) G05B 13/02 (2006.01)

Patent

CA 1282476

ADAPTIVE CONTROL ASSEMBLY FOR MECHANICAL SEAL ASSEMBLY Abstract: An adaptive control system (40) regulates operation of a mechanical seal assembly (25) by reacting dynami- cally to changes in seal operating conditions to provide minimal wear with minimal fluid leakage. The disclosed "self-learning" method adapts automatically to arbitrary changes in fluid medium temperature and pressure, as well as shaft rotation speed, by detecting a limit cycle type oscillation of a seal-related variable, such as temperature (TF) of a seal face and/or fluid temperature (TC). This variable is monitored via a microcomputer-based system which identi- fies these abrupt oscillations or spikes. The control algorithm selects a particular displacement of an actu- ator (43) to modify the seal face deflection to the optimal value, and in this way attains maximum seal life while minimizing leakage.

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