Amplitude test method of water lubrication rubber tail bearing based on machine vision technology

Abstract

The invention discloses an amplitude test method of a water lubrication rubber tail bearing based on a machine vision technology. The amplitude test method comprises the steps of: 1) measuring maximum vibration frequency of the water lubrication rubber tail bearing, determining the shoot frame number of a high speed camera according to the maximum vibration frequency, 2) taking a lath and a bearing backing at a corresponding part from the water lubrication rubber tail bearing as a test block, 3) marking a test track point on the side face, perpendicular to an axis of a test shaft, of the lath of the test block, 4) pressing the test block on the test shaft by pressure p, 5) starting the test shaft at a rotating speed n, 6) acquiring a vibration image sequence of the test block by the high speed camera, and 7) identifying an absolute level amplitude and an absolute vertical amplitude of the test track point according to the vibration image sequence. The method employs the technical scheme that the camera acquires the image sequence of the testing track point and extracts vibration information from the image sequence, solves the problem of a larger test error in the prior art, and is applicable to testing the water lubrication rubber tail bearing.

Description

technical field [0001] The invention relates to the technical field of vibration testing of water-lubricated rubber tail bearings, in particular to a method for testing the amplitude of water-lubricated rubber tail bearings based on machine vision technology. Background technique [0002] Water-lubricated rubber stern bearings have been used in ship shafting for more than 100 years and are still widely used today. The outstanding advantages of water-lubricated rubber tail bearings are shock absorption, excellent impact resistance and no water pollution, but its disadvantages are also prominent: low load-carrying capacity, and the design specific pressure is only 1 / 3 of that of oil-lubricated bearings. Therefore, under the working conditions of starting, stopping, low-speed operation and heavy load, the water-lubricated rubber stern bearing will generate vibration noise (Bearing Noise), which seriously affects the comfort, concealment and safety of the ship. This is the Achi...

AI Technical Summary

Problems solved by technology

At present, most of the amplitude tests of water-lubricated rubber tail bearings use the contact test method, but because the contact test method has interference factors such as the sensor's own weight, the surrounding environment and other constraints, the error of this test method is large and cannot be true. Reacting to the actual vibration of water-lubricated rubber tail bearings

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