Session: Research Posters

Paper Number: 110474

110474 - Online-Nde Technique for Industrial Fluid Measurements 

Industrial fluids, such as engine oil, lubricant, and coolant, have been ubiquitously employed in various manufacturing situations. Industrial fluids would inevitably suffer from degradation and contamination, which are detrimental to the normal function of the machine and manufacturing process, giving rise to economical loss or even safety hazards. Traditional sampling of industrial fluids by scheduled maintenance usually demands complicated and meticulous procedures, along with enormous time and financial expenditure. Therefore, the online non-destructive evaluation (NDE) of the industrial fluids is indispensable and of superior significance. By its nature, the monitoring of industrial fluids roots in the measurement of fluid property changes, like density and viscosity. The existing techniques, such as electromagnetic radiation, mass spectrometry, and electrical conductivity, do possess the detection capability but require careful operation and expensive equipment, and cannot be conveniently implemented. This brings a barrier for the mass production and large-scale industrial application. Hence, an efficient methodology and device are required to conduct online NDE of industrial fluids condition.

This paper proposes the electro-mechanical impedance (EMI) fluid-solid coupling transducer for online NDE of the industrial fluids. To develop a profound insight into the interaction mechanism between the industrial fluids and the sensory system, a three-dimension analytical model is established with the derivation of the impedance formula, where the influences of fluids are modelled as the additional inertial load and the dissipative viscosity. Parametric studies are carried out to evaluate the characteristic deviation of impedance spectra due to the fluid degradations. Subsequently, finite element method (FEM) considering the Fluid-Structure Interaction (FSI) is conducted to mutually verify the analytical model. The inertia force interaction from the fluid is implemented by the 3-D acoustic element (FLUID 30) while the viscosity force exerted by the fluid is simulated utilizing the spring-damper element (COMBIN 14). EMI spectroscopic index based on the amplitude and location shift of the resonant spectra is developed to quantify the fluid degradation severity. The EMI spectra and its deviation tendency from the 3-D analytical model display good consistency with the FEM analysis. Ultimately, the experimental assessment is performed to validate the analytical and numerical evaluations, and to practically demonstrate the effectiveness of the EMIS methodology for the real-time monitoring of lubricant oil and cutting fluid degradation. It is found that, with the service time and cycle of the tested industrial fluid increasing, the proposed EMI method can capture the fluid material change with high sensitivity and accuracy. This paper finished with summary, concluding remarks, and suggestions for future work.

Presenting Author: Runye Lu University of Michigan-Shanghai Jiao Tong University Joint Institute,

Presenting Author Biography: The author is a PhD candidate from Shanghai Jiao Tong University, his research interests are mainly about structural health monitoring and non-destructive evaluation.

Authors:

Runye Lu University of Michigan-Shanghai Jiao Tong University Joint Institute,
Yanfeng Shen University of Michigan-Shanghai Jiao Tong University Joint Institute