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International Society for Industrial Process Tomography

8th World Congress on Industrial Process Tomography

Investigations on viscous couplings using time-averaged rotation-synchronized gamma-ray computed tomography

A. Bieberle1, J. Schlottke2, W. Kühnel2 and Uwe Hampel1,3

1 Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden - Rossendorf, Bautzner Landstr. 400, 01328 Dresden, Germany

2 MAHLE Behr GmbH & Co. KG, Mauserstr. 3, 70469 Stuttgart, Germany

3 AREVA Endowed Chair on Imaging Techniques in Energy and Process Engineering,

Technische Universität Dresden, 01062 Dresden, Germany a.bieberle@hzdr.de

ABSTRACT

For controlled transfer of high torques in devices, like engine fans and/or four wheel drives, viscous couplings are frequently used. Torque transfer is realized by a working fluid, mainly responsible for the transfer quality, i.e. efficiency and operating range as well as stability. Unfortunately, investigations at rapidly rotating couplings are challenging since the parts consist of dense material, e.g. aluminum, have no optical access and the work area is composed of ring channels being significantly smaller than one millimeter. Thus, the high-resolution computed tomography measurement system (HireCT) is used for contactless liquid investigations in an industrial viscous coupling operated under various authentic operation scenarios. Despite the limited spatial resolution of approximately 2 mm and a measuring interval of approximately 900 s sharp liquid phase distribution could be provided in both primary disc and housing side of the coupling from a single CT scan. Here, the so called time- averaged rotation synchronized CT scanning mode is applied, where the acquired projection data streams are synchronized and averaged corresponding to the rotational position of the couplings’ parts. Therefore, zero crossing signals from the primary and secondary side are simultaneously acquired. The reconstructed data comprises the cross-section of the coupling and liquid distribution correspondingly.

Keywords gamma-ray computed tomography, viscous coupling

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