Shaft torsional vibration signal simulation test bench system and its application

Abstract

The invention discloses a shafting torsional vibration signal simulation experimental bench system and an application thereof. The bench system comprises a bench base, a servo motor, a bearing, a hydraulic vibration actuator, a hydraulic servo system, and a central control system. The hydraulic vibration actuator comprises a connecting shaft, an oil distribution shaft, an oil distributor on the shaft, and a vibration housing. The oil distribution shaft is provided with two annular oil ducts, and the oil distributor on the shaft is provided with two hydraulic oil tubes corresponding to the annular oil ducts. The rear segment of the oil distribution shaft comprises a hollow shaft core and two oil cavity sliding blocks. The vibration housing comprises an outer housing, an inner shaft sleeve, and two oil cavity separation parts. The two oil cavity separation parts are used to divide annular space between the outer housing and the inner shaft sleeve into two symmetric movable cavities, which are segmented into four hydraulic oil cavities by the two oil cavity sliding blocks. Four in-shaft oil ducts corresponding to the four hydraulic oil cavities are disposed in the oil distribution shaft. The outer housing is provided with a vibration measuring fluted disc, and an angular displacement sensor is disposed between the vibration housing and the oil distribution shaft.

Description

technical field [0001] The invention relates to a shafting torsional vibration experiment device, in particular to a shafting torsional vibration signal simulation test bench system and its application. Background technique [0002] Torsional vibration is one of the common vibration forms of shafting, which may cause severe vibration and noise of ship engine structure and power device, and even cause damage to ship propulsion system. [0003] Existing torsional vibration simulation test devices use excitation motors and universal joints to simulate torsional vibrations, such as the torsional vibration simulation test device disclosed in Chinese patent document CN104596714B, which only simulates the phenomenon, and does not affect the vibration amplitude and vibration frequency. Not well controlled. [0004] On the other hand, test instruments based on the pulse counting method to measure the torsional vibration of the shaft system are generally calibrated with the help of t...

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Problems solved by technology

The disadvantage of this method is that the research on the secondary excitation of torsion during the rotation of the cardan shaft is still very immature, and the structure of the cardan joint is relatively complex, affected by the processing level, the characteristic signal may also be mixed with other unknown frequencies Signals, etc., there are no more accurate research results on the rotational speed fluctuation angle and angular acceleration characteristics at different rotational speeds

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