TEMPERATURE OF THE TOP LEVEL SURFACE OF PARTS OF AGRICULTURAL SOIL TILLING MACHINERY. PART I – THE ANALYSED OBJECTS, OPERATING CONDITIONS AND CONTACT TEMPERATURE MEASUREMENTS
Journal Title: Tribologia - Year 2015, Vol 260, Issue 2
Abstract
During operation of working parts of agricultural machinery for soil tilling, the friction and abrasive wear of their surfaces occur due to the interaction of soil particles. Those processes cause a temperature increase in working elements. Contact measurements were used to determine the values of the temperatures reached by surfaces of ploughshares, subsoil shanks, and cultivator coulters, and tooth wings, during their operation in soil. Tribological processes depend on the material temperature in the friction micro areas. The temperatures were measured at three points on working surfaces (in the case of ploughshares, measurements were performed additionally in two places on the surface opposite to the working surface). The parts operated under various soil conditions. For the ploughshares, the measurements were carried while ploughing in the summer and autumn. The highest temperature (29.3–36.0°C) was observed for the ploughshares used during the summer period in the soil with low moisture. Compared to the soil temperature, it was higher by 5.5 to 12.2°C, i.e. approximately 1.2- to 1.5-fold higher. In the case of ploughing in the autumn, when the soil had a lower temperature and higher humidity, the temperature of ploughshares was lower (19.9 – 22.0°C). In relation to the soil temperature, it was from 2.8 to 4.9°C, i.e. from about 1.2 to 1.3 times higher. For the subsoil shanks, the temperature of their top layer was similar (ca. 23.5°C) and the values were 9.9 to 10.9°C, i.e. approximately 1.8 times higher than the soil temperature. The smallest increase in temperature was found for cultivator coulters and tooth wings. In case of coulters, the registered temperature was by ca. 2.0 and 2.2°C, i.e. slightly above 1.1-fold higher than the temperature of soil and the surface temperature of the tooth wings was comparable to that of soil.
Authors and Affiliations
Piotr KOSTENCKI, Tomasz STAWICKI
Keywords
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