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Method for monitoring marine propulsion shafting bearing vibration failure

A bearing vibration and fault monitoring technology, which is applied to ship components, ship construction, ship design, etc., can solve problems such as unfavorable fault diagnosis, difficult to determine the type of fault, and inconvenient maintenance and repair of shafting

Inactive Publication Date: 2017-01-25
CETC NINGBO MARINE ELECTRONICS RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the special position of the bearing in the entire shafting system and the harsh environment, it is not convenient for maintenance personnel to maintain and overhaul the shafting system
In addition, when a small fault occurs in the bearing, it is difficult to detect the fault from the surface or through some detection equipment, which increases the difficulty of maintenance
In the existing technology, the method of vibration analysis is usually used in the analysis of bearing faults, but it is difficult to determine the type of fault by simply adopting spectrum analysis or power spectrum analysis, which is not conducive to the diagnosis of faults

Method used

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  • Method for monitoring marine propulsion shafting bearing vibration failure
  • Method for monitoring marine propulsion shafting bearing vibration failure
  • Method for monitoring marine propulsion shafting bearing vibration failure

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with the accompanying drawings.

[0039] figure 1 It is a method flow chart of an embodiment of the method for monitoring vibration faults of ship propulsion shafting bearings according to the present invention. The method of this embodiment comprises the following steps:

[0040] (1) Offline creation of the ship propulsion shafting vibration template library: including the energy entropy eigenvectors of each group of bearing vibration signals corresponding to different main engine speeds, stern shaft speeds, and gearbox alignment states under the trouble-free operating conditions of the ship propulsion shafting;

[0041] (2) Synchronous data collection: synchronously collect vibration acceleration signals of ship propulsion shafting bearings, main engine speed, stern shaft speed, and gear box alignment status;

[0042] (3) Data classification: According to the above-mentioned main engine speed, ster...

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Abstract

The invention discloses a method for monitoring a marine propulsion shafting bearing vibration failure. The method comprises the following steps: (1) creating a marine propulsion shafting vibration template library in an off-line mode; (2) synchronously collecting various monitor variables, including marine propulsion shafting bearing vibration acceleration signals, the host rotating speed, the propeller shaft rotating speed and the gearbox joining state; (3) classifying data; (4) performing time-frequency transformation on the classified vibration acceleration speed data by adopting a wavelet packet analysis method to acquire energy feature vectors on different feature frequency bands, transforming feature data of different frequency bands, and extracting the energy entropy feature vectors of the feature data to serve as to-be-matched feature vectors; (5) monitoring a failure, namely determining a specific failure type according to the similarity measure matching result; and (6) online updating the marine propulsion shafting vibration template library by utilizing the energy entropy feature vector which has no failure found in detection. The method is convenient and feasible to collect data, can be used for online monitoring and failure diagnosis, and can meet the requirement of long-term failure diagnosis and analysis.

Description

technical field [0001] The invention belongs to the technical field of safety monitoring of ship power devices, and relates to a method for monitoring operation faults of ship propulsion shafting, in particular to a method for monitoring vibration faults of bearings of ship propulsion shafting. Background technique [0002] In the ship propulsion shafting system, the bearing is an important part of the ship's power plant system. As the carrier of the energy transfer of the ship's operation, the consequences of the accident caused by the failure are quite serious. Therefore, the reliability and stability of the bearing are of great significance to the safety of the ship. . Due to the special position of the bearing in the entire shafting system and the harsh environment, it is not convenient for maintenance personnel to maintain and overhaul the shafting system. In addition, when a minor fault occurs in the bearing, it is difficult to detect the fault from the surface or thr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B9/00
CPCB63B71/00
Inventor 万振刚薛勇袁文华章燕戴晓强赵强黄巧亮张永林刘维亭
Owner CETC NINGBO MARINE ELECTRONICS RES INST
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