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A non-intrusive oil temperature measurement method of hydraulic system

机译：液压系统的非侵入式油温测量方法

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摘要

This paper proposed a simple non-intrusive oil temperature measurement method to overcome the shortcomings of the traditional intrusive one. The heat transmission model between outer and inner tube wall, the temperature distribution model of oil near the inner tube wall, and the temperature distribution model of oil in tube were established, respectively, based on the energy conservation principle. With the constructed models, we can measure the temperature of oil in tube by surveying the temperature of outer tube wall and the temperature of air around the tube. An oil temperature measurement apparatus was designed to demonstrate the new method. We measured the temperature of No. 46 antiwear hydraulic oil under 5 MPa, 15 MPa, and 25 MPa, respectively. Comparative results with traditional intrusive oil temperature measurement method show that the measurement error of the presented method is less than 1 °C, and thus implies its superiority.
机译：提出了一种简单的非侵入式油温测量方法，以克服传统侵入式油温测量方法的缺点。基于节能原理，分别建立了内外管壁之间的传热模型，内管壁附近的油的温度分布模型和管内油的温度分布模型。利用构建的模型，我们可以通过测量外管壁温度和管子周围的空气温度来测量管子中的油温。设计了一种油温测量仪来演示该新方法。我们分别在5 MPa，15 MPa和25 MPa下测量了46号抗磨液压油的温度。与传统的侵入式油温测量方法的比较结果表明，该方法的测量误差小于1°C，因此具有优越性。

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