Profiling a Ball Bearing Oil Film with Ultrasonic Reflection

Ibrahim, M. K. Wan; Gasni, Dedison; Dwyer-Joyce, R. S.

doi:10.1080/10402004.2012.664836

Cited by 21 publications

(14 citation statements)

References 16 publications

(11 reference statements)

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“…And it is worth noting that the high frequency ultrasonic repetition is required to ensure the accuracy of the measurement under high speed condition. 18…”

Section: Measurement Methodsmentioning

confidence: 99%

Study on the rotational speed of bearing cage based on ultrasonic measurement

Liu

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part K:

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In this paper, a new method for measuring the cage speed based on the ultrasonic reflection principle is proposed. By emitting high-frequency ultrasound signal for penetrating the bearing outer ring and detecting its ultrasonic echo signal continuously, the time of each rollers passing under the probe can be recorded accurately by detecting the change in the ultrasonic echo signal. Then, the rotation speed of the roller can be obtained by counting the passing frequency of the rollers. For the cages under working conditions, the cages and the rollers share the same rotation speed, where the cage rotation speed is an indication of the bearing operation. Compared to the optical measurement method for the rotation speed of bearing cage, the new method does not need any special arrangement for the bearings and is not sensitive to the environmental factors such as oil mist. In this paper, the new method is used to measure the rotation speed of the cage under different working conditions. By comparing the experimental results with the traditional optical method measurement result and the theoretical calculation results, the measurement results are basically consistent, which verifies the credibility and validity of the new measurement method.

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“…And it is worth noting that the high frequency ultrasonic repetition is required to ensure the accuracy of the measurement under high speed condition. 18…”

Section: Measurement Methodsmentioning

confidence: 99%

Study on the rotational speed of bearing cage based on ultrasonic measurement

Liu

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part K:

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“…Zhang et al [13] in 2005 and Drinkwater et al [14] in 2009 used an ultrasonic pulse-receiver (Panametrics 5072PR) operating at its maximum pulse repetition frequency of 20 KHz to monitor the film thickness of a ball bearing at a shaft speed of 506 rpm. Wan Ibrahim et al [15] in 2012 studied the effects of PRR (ranging from 1 to 10 kHz) on the accuracy of the measurements, in which the maximum shaft speed is only 600 rpm. The results prove that there was a greater spatial resolution for the ball profile by using high PRR but only one ball could be imaged.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Measurement of Cylindrical Roller Bearing Lubrication Using High Pulse Repletion Rates

Liu

et al. 2015

Journal of Tribology

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This paper describes a measurement of lubricant-film thickness in a roller bearing using a new ultrasonic pulser-receiver, which has a maximum pulse repetition rate (PRR) of 100 kHz. The experimental results show that a higher PRR can help to get more measurement points and more details of the oil-film thickness distribution. Furthermore, the influence of rotor vibration response for the oil-film thickness is discussed, which is in keeping with the simulation result. Finally, the limits of the PRR are discussed in detail and the effect of the transducer focal zone size is also observed. IntroductionThe lubricant layer is a separation between the races and the elements in a roller bearing, which reduces friction and wear and provides smooth operation and long life for machines. Therefore, the thickness and behavior of the lubricant film are important to model and measure. However, it is very difficult to measure this lubricant-film thickness directly in industrial applications as the load is carried by an extremely thin lubricant film over a very small lubricated region.Electrical and optical methods have been used to measure the lubricant-film thickness. Resistance and capacitance methods are sensitive to the surface roughness and require electrical isolation [1][2][3]. Optical methods need translucent materials so they are rarely used outside the laboratory [4,5]. Compared with the methods mentioned above, the ultrasound method [6-8] removes the requirement of electrical isolation and transparency. The reflection coefficient of longitudinal ultrasonic waves has been shown to be highly sensitive to the lubricant-film thickness [9]. This method has been applied to a range of bearings including journal and ball bearings [10][11][12].

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“…The reflected energy holds information of the fluid structure. The ultrasonic reflectance methodology has been used for measurement of lubricant film thickness [ 9 , 10 , 11 ], chemical relaxation, absorption [ 12 , 13 ] and viscosity [ 14 , 15 , 16 , 17 , 18 , 19 ]. The measurement method is obvious and several algorithm and procedures for measurement have been tested.…”

Section: Introductionmentioning

confidence: 99%

An Ultrasonic Rheometer to Measure Gas Absorption in Ionic Liquids: Design, Calibration and Testing

Schirru

Adler

2020

Sensors

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The first goal of this study is to identify the ideal piezoelectric material for the manufacturing of rheological reflectance ultrasonic sensors. The second goal is to integrate the ultrasonic rheometer within a gas absorption reactor and to measure viscosity changes in an ionic liquid (IL) caused by gas absorption. To achieve the objectives, bismuth titanate, lead titanate, lead metaniobate and lead zirconate titanate materials in layer, tungsten bronze and perovskite structures were assembled on aluminum delay lines and tested under thermal cycling between room temperature and 150 °C. The results showed that lead metaniobate in tungsten bronze structure is the most suitable material for long time duration thermal cycling. Therefore, the ultrasonic rheometer was assembled using this material and installed in a pressurized reactor to test a reference IL at the operating conditions of 50 °C and at a pressure of 80 bar. The reference IL was saturated with nitrogen as well as hydrogen gas. Viscosity signals remained constant under the hydrogen atmosphere, while in nitrogen atmosphere the absorption of the gas lead to a rise in the value of viscosity.

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Profiling a Ball Bearing Oil Film with Ultrasonic Reflection

Cited by 21 publications

References 16 publications

Study on the rotational speed of bearing cage based on ultrasonic measurement

Study on the rotational speed of bearing cage based on ultrasonic measurement

Ultrasonic Measurement of Cylindrical Roller Bearing Lubrication Using High Pulse Repletion Rates

An Ultrasonic Rheometer to Measure Gas Absorption in Ionic Liquids: Design, Calibration and Testing

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