Fault detection method and device for aircraft engine intermediate bearing

摘要: The invention provides a fault detection method and device for an aircraft engine intermediate bearing. A low-voltage rotor high-voltage in the are mounted among three supporting frames; reflective paper patches attached to shaft of close one end motor respectively. Two photoelectric sensors utilized collect rotational speed pulse signals, eddy current displacement sensor is vibration signals bearing; problems that bearing characteristic frequency poor drift on spectrum leptokurtosis can be well solved by determining doubling, collecting original time domain obtaining zero phase position slip domain, calculating speed-time function, converting time-domain into intersection-angle-domain detecting through envelope spectrum.