Sliding bearing universe lubricant film thickness distribution detection method

Abstract

The invention discloses a sliding bearing universe lubricant film thickness distribution detection method to realize real-time detection of the sliding bearing universe lubricant film thickness distribution under an actual working condition. The method comprises the following steps: through the finite difference method, iterating to solve the lubricant basic equation of the sliding bearing to acquire the theoretical distribution of the lubricant film thickness of the sliding bearing, then, according to the theoretical distribution of the lubricant film thickness of the sliding bearing, determining the positions of distributed measure points of the sliding bearing, at the selected positions of the measure points, mounting circular sheet ultrasonic sensors in an embedded manner, and acquiring the real-time film thickness values of all measure points by adopting the ultrasonic film thickness measurement technology, and finally, performing interpolation on the measured lubricant film thickness values at all distributed measure points to acquire the distribution of the lubricant film thicknesses of the sliding bearing under the actual working condition.

Description

technical field [0001] The invention belongs to the technical field of bearing lubrication, and relates to a method for detecting the lubrication of a bearing, in particular to a method for detecting the thickness distribution of the global lubrication film of a sliding bearing. Background technique [0002] Sliding bearings have the characteristics of high running precision, large impact load, and long service life. They are especially suitable for high-speed, precision, and heavy-duty occasions. key core components. [0003] (1) The frequent occurrence of local rubbing phenomenon determines that the detection of the global distribution of the lubricant film thickness of sliding bearings is very important [0004] The bearing lubricating film plays an important role in reducing the frictional resistance of the bearing, reducing the wear of the bearing surface and ensuring the normal operation of the equipment. The rupture of the lubricating film of the bearing will lead t...

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Problems solved by technology

[0015] (3) There is a lack of technical solutions that can detect the thickness distribution of the lubricant film in the entire area of ​​sliding bearings

[0017] Electrical measurement methods (resistance method, capacitance method) can only obtain the average value of the lubrication film thickness of the entire bearing, which cannot meet the requirements of high spatial resolution

[0018] Optical measurement method (optical interference method, light diffraction method) needs to provide an optical path for the sensor, so it is necessary to open a window on the bearing or use a transparent material, which obviously cannot meet the requirements of being used in actual working conditions

[0019] Due to the limitation of the model, the traditional acoustic measurement method (ultrasonic time-of-flight method, ultrasonic thin film resonance method) makes the ultrasonic wave only able to measure the thickness of the lubricating film above 10 microns, which cannot meet the requirements of detecting the thickness of the extremely thin lubricating film

[0020] Although the latest appearance of the ultrasonic spring model method overcomes the limitation of the traditional ultrasonic method (ultrasonic time-of-flight method, ultrasonic thin film resonance method) that the acoustic measurement method cannot detect the thickness of the extremely thin lubricating film below 10 microns due to the limitation of the model, so far So far, the acoustic measurement method is only used to detect the thickness of the lubricating film at a certain point in the bearing, which cannot meet the requirements of obtaining the overall information of the lubricating film thickness of the bearing.

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