Hazardous Wear Prevention System for Friction Units of Gas Turbine Engines

摘要

The hazardous wear prevention Systems is comprised the automated continuousmonitoring system of gas turbine lubricated friction units, the operation of which is based on the change in the number of wear particles, as well as the average wear particle size in oil. The system includes the cyclonic separator, self-cleaning sensors from ferromagnetic particles, the control unit and the measured data accumulation unit. The system's sensor is installed in the case of cyclonic separator of the wear particles that is incorporated in oil scavenge line. The sensor's operation is based on the well-known principle of the ferromagnetic wear particles accumulation between the two totally isolated from each other magnetic (plus and minus) poles. They are at the same time used for ensuring the electrical contacts. In case sufficient electroconducting ferromagnetic particles are accumulated the contacts are shortened. A completely new sensor's design, new algorithmic equations and the measured data processing allow to increase decisively the sensor's sensibility and to apply it for measuring the ferromagnetic wear particles velocity multiplied by the average size under the real time condition. The paper presents the first tests results of the hazardous wear prevention system as a part of PS-9OGP gas turbine engine.