Title:
RUBBING POSITION LOCATING DEVICE FOR ROTARY MACHINE
Document Type and Number:
Japanese Patent JPS63179222
Kind Code:
A
Abstract:
PURPOSE:To accurately detect a rubbing occurrence position by performing the envelope detection processing of the outputs of 1st and 2nd AE sensors provided to bearing parts at both ends of a rotor, comparing extracted rotational frequency components of the rotor with each other, and locating the rubbing position according to the obtained phase difference. CONSTITUTION:The AE sensors 3a and 3b are arranged at the bearing parts 2a and 2b, whose outputs are amplified by amplifiers 4a and 4b and supplied to detection processing parts 5a and 3b for the envelope detection processing. Then their detection signals are supplied to rotation tuning signal extraction parts 6a and 6b which use, for example, rotation tuning filters to extract rotational frequency components, which are compared by a comparison part 7 with each other to send the result to a position locating arithmetic part 8. Then the arithmetic part 8 measures the phase of the signal with the information from the comparator 7 and the outputs of the extraction parts 6a and 6b to perform rubbing position locating arithmetic base upon a specific arithmetic expression and outputs the result to an output part 9.
Inventors:
YONEYAMA TAKAO
SATO KAZUYA
TAGUCHI YUJI
YANAGIBASHI MINORU
SATO KAZUYA
TAGUCHI YUJI
YANAGIBASHI MINORU
Application Number:
JP990287A
Publication Date:
July 23, 1988
Filing Date:
January 21, 1987
Export Citation:
Assignee:
HITACHI LTD
HITACHI SERVICE ENG
HITACHI SERVICE ENG
International Classes:
G01M99/00; G01H1/00; G01H17/00; (IPC1-7): G01H1/00; G01H17/00; G01M19/00
Attorney, Agent or Firm:
Katsuo Ogawa