METHOD OF CONSTRUCTING A MATHEMATICAL MODEL OF WEAR-RESISTANCE IN POTENTIOMETER SENSORS
DOI:
https://doi.org/10.24025/2306-4412.3.2020.199294Keywords:
sliding contact, wire potentiometer, tribological processes, capacious erosion, reliability of work.Abstract
This article highlights the method of constructing a mathematical model of wear-resistance in potentiometer sensors. Depreciation process of working surfaces is so complex that by this time there are no reliable methods of its forecasting. Tribological processes taking place during potentiometer sensor performance are complicated by electric current influence that flows through the contact surface and accelerates the process of contact surfaces wear. As a result, the mathematical model is offered, that considers the simultaneous action of tribological elastic contact, plastic deformation, microcutting and electrical erosion with constant number of performance cycles. Wear-resistance is represented as the magnitude of change in volume of the worn material depending on the shape and material of contact surfaces, contact pressure and magnitude of electric current. The model is represented in the form of dependence, interpreted by the direct equation, greatly simplifies the forecasting of wear-resistance on the basis of experimental data. Mathematical model, obtained by adding bulk models of mechanical and current wear can be used to predict durability in the design and operation of potentiometer sensors, wire potentiometers and other devices that have a similar structure and work under the current.References
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