Report 20: Developments in the Measurement of Oil-Film Thickness in Dynamically Loaded Bearings

1967 ◽  
Vol 182 (7) ◽  
pp. 105-108 ◽  
Author(s):  
A. E. Butcher
Keyword(s):  
Film Thickness ◽  
Review Paper ◽  
Measurement Techniques ◽  
Measuring System ◽  
Measuring Instruments ◽  
Practical Case ◽  
Oil Film ◽  
Dynamically Loaded ◽  
Recording Analysis ◽  
Further Development

This report describes the development of a capacitive system for the measurement of oil-film thickness in big-end and centre main bearings of a 600 h.p., 600 rev/min, diesel engine. The object of this work was to compare the theoretical prediction of bearing behaviour with the practical case. Engineering aspects of these measurements are given in the 1967 Institution of Mechanical Engineers Review Paper on dynamically loaded bearings. Reasons for the development of this system are given, along with a description of measurement techniques, including transmission of signals from the moving big-end to the measuring instruments. Data recording, analysis, and presentation of results are also described. One of the most significant features of this work was the manner in which the bearing distorted during an engine cycle. This has shown the need for further experimental measurements, which in turn have made it necessary for further development or partial automation of the measuring system.

Study of Monitoring for Oil Film Thickness of Elastic Metallic Plastic Pad Thrust Bearing

2010 ◽  
Vol 450 ◽  
pp. 239-242 ◽  
Author(s):  
Yong Hai Li ◽  
Xiao Dong Yu ◽  
Chuang Li ◽  
Xiu Li Meng
Keyword(s):  
Optical Fiber ◽  
Film Thickness ◽  
Thrust Bearing ◽  
Ambient Medium ◽  
Measuring System ◽  
Monitoring Method ◽  
Distance Information ◽  
Oil Film ◽  
Sensor Model ◽  
Set Up

On-line monitoring method of structural characteristics and traditional performance parameters of babbitt metal pad thrust bearing is analyzed. Based on deformation characteristics of elastic metallic plastic(EMP) pad thrust bearing, an oil film thickness measuring system is applied to set up a new kind of optical fiber reflective sensor model, the outputs of the sensor are independent of the characteristics of the light source, the losses in the ambient medium and the target reflectivity. Additionally, the distance information is averaged over several points on the target surface, which reduces signal fluctuations due to inhomogeneities. An optical fiber sensor model of correcting static error based on BP artificial neural network (ANN) is set up also. According to the actual operation in thrust bearing test board, the designed system shows better performance.

Development of Two-Dimensional Oil Film Thickness Distribution Measuring System

1995 ◽  
Author(s):  
Hideto Inagaki ◽  
Akinori Saito ◽  
Motoichi Murakami ◽  
Toshiaki Konomi
Keyword(s):  
Film Thickness ◽  
Thickness Distribution ◽  
Measuring System ◽  
Two Dimensional ◽  
Oil Film

The adjustment suggestions for the GOST R 8.596-20xx “State system for ensuring the uniformity of measurements. Metrological assurance for measuring systems. Main principles”

Metrologiya ◽  
2020 ◽  
pp. 3-14
Author(s):  
A. Iu. Kozhenikov ◽  
O. A. Korovina
Keyword(s):  
Power Plants ◽  
Measurement Techniques ◽  
State Regulation ◽  
State System ◽  
Metrological Assurance ◽  
Measuring System ◽  
Measuring Instruments ◽  
Measuring Systems ◽  
Uniformity Of Measurements ◽  
Complex Measuring

It’s suggested to adjust the existing normative documents, in particular the first version of GOST R 8.596-20xx “State system for ensuring the uniformity of measurements. Metrological assurance for measuring systems. Main principles”. The aim of the proposed adjustment is to legitimate the nuclear power plants complex measuring systems application, taking into account their peculiarities in the sphere of state regulation of ensuring the unity of measurements. Generally complex measuring systems possess all features of the adaptive and intelligent measuring systems, which parameters and algorithms can vary during operation. Therefore, it is proposed for adaptive and intelligent measuring systems and for branched measuring channels, to provide the possibility of dividing into separate measuring components without the whole system or channel approving. The systems and channels measuring components are proposed to be considered as approval measuring instruments, which interaction is regulated by certified measurement techniques. When selecting the boundaries of the measuring system or channel, it is proposed to provide the possibility to be guided by the reasonability of the sorting the technical means or operations involved in parameter control as metrologically significant. In addition, it is proposed to introduce a statute that allows to avoid the type approving of the “degenerate” systems consisting of one or more simple channels formed only by the measuring means.

scholarly journals Raman Sensor for the Determination of Gas Solubility

Physchem ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 176-188
Author(s):  
Gregor Lipinski ◽  
Markus Richter
Keyword(s):  
Carbon Dioxide ◽  
Gas Separation ◽  
Accurate Determination ◽  
Measurement Techniques ◽  
Screening Tools ◽  
Measuring System ◽  
Separation Processes ◽  
Use Of Resources ◽  
Gas Solubilities

Efficient and environmentally responsible use of resources requires the development and optimization of gas separation processes. A promising approach is the use of liquids that are designed for specific tasks, e.g., the capture of carbon dioxide or other greenhouse gases. This requires an accurate determination of gas solubilities for a broad range of temperatures and pressures. However, state of the art measurement techniques are often very time consuming or exhibit other pitfalls that prevent their use as efficient screening tools. Here, we show that the application of Raman spectroscopy through a compact measuring system can simplify data acquisition for the determination of gas solubilities in liquids. To demonstrate that this approach is expedient, we determined gas solubilities of carbon dioxide in water for three isotherms T = (288.15, 293.15, 298.15) K over a pressure range from p = (0.5–5) MPa and in three imidazolium-based ionic liquids for one isotherm T = 298.15 K at pressures from p = (0.1–5) MPa. When compared to data in the literature, all results are within the reported uncertainties of the measurement techniques involved. The developed analysis method eliminates the need for a lengthy volume or mass calibration of the sample prior to the measurements and, therefore, allows for fast screening of samples, which can help to advance gas separation processes in scientific and industrial applications.

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