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工作油溫升對液粘傳動(dòng)調(diào)速起動(dòng)的影響?yīng)?/div>
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Working Oil Temperature Rise on Hydro-viscous Drive Speed Regulating Start
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    摘要:

    采用有限元法聯(lián)立求解修正瞬態(tài)雷諾方程,、熱能量方程及潤滑油粘溫方程,，對調(diào)速起動(dòng)過程進(jìn)行了數(shù)值模擬研究,討論了起動(dòng)過程中工作油溫升對液粘傳動(dòng)調(diào)速起動(dòng)的影響,。結(jié)果表明，流入摩擦片工作油溫度為30℃時(shí),，流經(jīng)摩擦片后溫度約升高20℃,，它所引起的油膜承載力下降9%；而流入摩擦片工作油溫度由30℃升至50℃時(shí),，即使不考慮流經(jīng)摩擦片的溫升,，油膜承載力也將下降32%。這樣易引起油膜承載力低于比例溢流閥死區(qū)對應(yīng)壓力,，導(dǎo)致摩擦片直接接合,，不能取得理想的調(diào)速起動(dòng)效果。調(diào)速起動(dòng)實(shí)驗(yàn)驗(yàn)證了理論分析的正確性,。

    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.

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孟慶睿,侯友夫.工作油溫升對液粘傳動(dòng)調(diào)速起動(dòng)的影響?yīng)琜J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2010,41(10):214-218. Working Oil Temperature Rise on Hydro-viscous Drive Speed Regulating Start[J]. Transactions of the Chinese Society for Agricultural Machinery,2010,41(10):214-218.

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