Adaptive control system for mechanical seal assembly

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

1985-10-21

1987-09-01

Gruber, Felix D.

Boots, shoes, and leggings

364505, 364570, 277 28, 277901, 73 46, 73 493, G06F 1546, F16J 1534

Patent

active

046912762

ABSTRACT:
An adaptive control system regulates operation of a mechanical seal assembly by reacting dynamically 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 of a seal face and/or fluid temperature. This variable is monitored via a microcomputer-based system which identifies these abrupt oscillations or spikes. The control algorithm selects a particular displacement of an actuator 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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patent: 4424975 (1984-01-01), Langebrake
patent: 4511149 (1985-04-01), Wiese
patent: 4643437 (1987-02-01), Salant et al.

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