Abstract:To reveal the effect of working oil temperature rise on hydro-viscous drive speed regulating start, by using finite element method, the modified transient Reynolds equation, energy equation and temperature-viscosity equation were solved simultaneously to simulate the startup process. The results showed that the oil film temperature rise caused by the friction pair approximately was 20℃ when inlet temperature of the working oil was 30℃, the decrease of oil film load capacity was about 9%. If inlet temperature of the working oil rised from 30℃ to 50℃, the oil film load capacity decreased by 32% even if the temperature rise caused by the friction pair was neglected. It could make oil film load capacity lower than the dead zone pressure of the proportional pressure valve used in the control system, thus the friction discs were engaged directly and could not get a perfect speed regulating start. The results were verified by experiments. |
Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.
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