Theoretical substantiation of the grain dryer with a spiral working element

Dolgov, V. I.; Kurdyumov, V.I.; Pavlushin, Andrey A.

doi:10.18286/1816-4501-2018-1-6-10

Cited by 2 publications

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“…To prevent the current collector from rotating and damping the resulting vibrations, a clamp 11 is installed on the housing 1 with a rubber gasket 2 ... 4 mm thick [14][15][16].…”

Section: Results and Their Discussionmentioning

confidence: 99%

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The feasibility of determining the condition of friction units of engines by the EMF magnitude

et al. 2021

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The paper is devoted to theoretical studies of the feasibility to determine the clearance size in the friction units of an internal combustion engine by the magnitude of the electromotive force (EMF) that arises in them. The effect of the contact area of the friction pairs and the clearance between them on the electrical resistance in the contact, and, accordingly, on the magnitude of the emerging EMF was theoretically confirmed. As a result of the theoretical studies, the relationship of the influence of changing clearances on the magnitude of the EMF arising in them was established. To confirm the theoretical calculations, bench studies of the UMZ-417 engine were carried out to determine the magnitude of the EMF arising in its friction pairs depending on the change in the crankshaft rotation speed, followed by micrometry of the parts. The study was carried out using the designed current collector. The obtained theoretical and experimental results confirm the feasibility of determining the condition of friction units by the magnitude of the EMF generated in them and with sufficient accuracy to determine the dynamics of the clearance size between rubbing parts.

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“…To prevent the current collector from rotating and damping the resulting vibrations, a clamp 11 is installed on the housing 1 with a rubber gasket 2 ... 4 mm thick [14][15][16].…”

Section: Results and Their Discussionmentioning

confidence: 99%

“…Thus, the change in the basic strength properties of the materials of the friction surfaces is primarily associated with the occurrence of EMF and electric current in the working contact [10][11][12][13][14].…”

Section: Methodsmentioning

confidence: 99%

The feasibility of determining the condition of friction units of engines by the EMF magnitude

et al. 2021

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The results of studying the EMF emergence in friction pairs of power machines

et al. 2021

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The work is devoted to the experimental studies of determining the magnitude of the electromotive force (EMF) that arises in the friction pairs of an internal combustion engine (ICE) and the possibility to assess its technical condition by the magnitude of the electromotive force. A research procedure was designed to carry out an experiment. The measurement of small value voltages was carried out using a control and measuring device, the principle of operation of which is based on operational amplifiers (OA). Based on the previously obtained theoretical values of the EMF, the designed millivoltmeter can make measurements in the range of the following values: from 50 μV to 1 mV and from 1 mV to 40 mV. To ensure the reliability of the readings of the measuring device, its calibration was carried out with the use of an AMPROBE 37XR-A digital multimeter. As a result of the measurements, the relationship between the EMF value and the crankshaft speed of the power plant was established. The analysis of the research results confirms the possibility of diagnostic assessment of the power machine condition by the values of the measured EMF using the proposed measuring complex.

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Theoretical substantiation of the grain dryer with a spiral working element

Cited by 2 publications

References 0 publications

The feasibility of determining the condition of friction units of engines by the EMF magnitude

The feasibility of determining the condition of friction units of engines by the EMF magnitude

The results of studying the EMF emergence in friction pairs of power machines

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