本文選題：滑閥 + 流固耦合�。� 參考：《液壓與氣動(dòng)》2017年05期

【摘要】：液壓滑閥在工作過程中常常因黏性加熱而出現(xiàn)閥芯熱卡緊現(xiàn)象,基于流固耦合共軛傳熱方法,運(yùn)用COMSOL軟件對(duì)滑閥內(nèi)的熱-流-固多物理耦合場(chǎng)進(jìn)行數(shù)值計(jì)算。結(jié)果表明:高溫主要集中在速度梯度較大的區(qū)域以及受高速油液沖刷的節(jié)流槽壁面,由此產(chǎn)生的閥芯節(jié)流槽區(qū)域徑向不均勻環(huán)狀凸起變形可能直接導(dǎo)致閥芯卡緊;閥芯最大徑向熱變形量可達(dá)1.31μm,位于節(jié)流槽矩形工作邊處;黏溫特性對(duì)滑閥內(nèi)的黏性加熱效應(yīng)具有消極的影響,含氣泡油液卻與此相反,導(dǎo)熱率與溫度的線性關(guān)系對(duì)滑閥閥芯徑向熱變形也具有消極的影響;考慮以上因素并不改變滑閥內(nèi)的溫度場(chǎng)分布與熱變形特征,而是使計(jì)算結(jié)果更加符合實(shí)際工況。
[Abstract]:In the working process of hydraulic slide valve, the heat clamping phenomenon of valve core often occurs due to viscous heating. Based on the fluid-solid coupling conjugate heat transfer method, the thermal-fluid-solid multi-physical coupling field in the slide valve is numerically calculated by using COMSOL software. The results show that the high temperature is mainly concentrated in the area with high velocity gradient and the wall of throttling groove washed by high speed oil. The radial inhomogeneous annular bulge deformation in the throttle zone of the valve core may lead to the valve core clamping directly. The maximum radial thermal deformation of the valve core is up to 1.31 渭 m, which is located at the working edge of the rectangular throttling groove. The viscosity and temperature characteristics have a negative effect on the viscous heating effect in the slide valve, but the bubble oil is the opposite. The linear relationship between thermal conductivity and temperature also has a negative effect on radial thermal deformation of the valve core, and the above factors do not change the distribution of temperature field and the characteristics of thermal deformation in the slide valve, but make the calculation results more in line with the actual working conditions.
【作者單位】： 蘭州理工大學(xué)能源與動(dòng)力工程學(xué)院;甘肅省液壓氣動(dòng)工程技術(shù)研究中心;
【基金】：國(guó)家自然科學(xué)基金(57515254)
【分類號(hào)】：TH137.52

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