目的 为精确控制轧辊辊面温度,对极片热轧流道布置与流体速度进行系统性研究。方法 分析了单、双螺旋流道布置对轧辊辊面温度的影响,设计了螺距值40、50、60 mm 3种等螺距双流道和3种不等螺距双流道方案,设置了1、2、3 m/s 3种热油速度,共构建了18种热流道工况;利用ANSYS仿真软件对18种工况进行模拟,分析轧辊等螺距、不等螺距、流速对轧辊温度的影响规律,利用方差获得温度均匀的最优参数。结果 流速对轧辊辊面温度的影响较大,随着流速的增大,对流换热和导热热阻均增加,但导热热阻增加更为明显,当速度达到临近值时,温度增加量达到最大,因此合理的流速是保证辊面温度的重要因素;在等间距流道条件下,流道间距越小,辊面温度均匀性越高,在满足流道强度和干涉前提下,流道间距取最小值为40 mm;不等距流道条件下的轧辊辊面温度均匀性好于等螺距流道方案下的,轧辊中段流道螺距P2的最优值为70 mm,此时辊面温差最小。结论 当流速为2.2 m/s时,辊面温度均匀性最好;在等螺距最小间距40 mm条件下,辊面最小温度差为±1.55 ℃;在轧辊中段流道螺距P2=70 mm的不等距条件下,辊面温度差为±0.71 ℃,进一步提高了辊面温度均匀性。
Abstract
In order to achieve precise and uniform control of roller surface temperature, the work aims to carry out systematic research on the arrangement of flow channels and fluid velocity. The effect of the arrangement of single and double helix flow channels on the surface temperature of the roller was analyzed. Three equal pitch double flow channel schemes with pitch values of 40, 50, and 60 mm, as well as three non-uniform double flow channel schemes, were designed. Three hot oil velocities of 1, 2, and 3 mm/s were set, and a total of 18 hot flow channel working conditions were constructed. The ANSYS simulation software was used to simulate 18 working conditions and the effect of equal pitch, unequal pitch, and flow velocity on the temperature of the roller was analyzed. The optimal solution for uniform temperature was obtained with the equal difference analysis method. The flow velocity had a significant impact on the surface temperature of the roller. With the increasing flow velocity, both convective heat transfer and thermal conduction resistance were enhanced. However, the enhancement of thermal conduction resistance was more significant. When the velocity reached a near value, the temperature increase reached its maximum. Therefore, a reasonable flow velocity was an important factor in ensuring the surface temperature of the roller. Under the condition of equal spacing flow channels, the smaller the channel spacing, the higher the temperature uniformity of the roller surface. Under the premise of satisfying channel strength and interference, the minimum channel spacing was taken as 40 mm. Under the condition of unequal spacing flow channels, the temperature uniformity of the roller surface was better than that of the equal pitch flow channel scheme. The optimal value for the flow channel spacing P2 in the mid-section of the roller was 70 mm, with a smallest temperature difference on the roller surface. When the flow velocity is 2.2 m/s, the temperature uniformity on the roller surface is the best. Under the condition of a minimum pitch of 40 mm, the minimum temperature difference on the roller surface is ±1.55 ℃. Under the unequal spacing condition with a mid-section channel pitch of P2=70 mm in the roller, the temperature difference on the roller surface is ±0.71 ℃, further improving the uniformity of roller surface temperature.
关键词
电池极片 /
轧辊热模拟 /
双螺旋流道 /
不等距流道 /
温度均匀性
Key words
battery pole plate /
thermal simulation of roller /
double helix flow channel /
unequal spacing flow channel /
temperature uniformity
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基金
河北省重大科技支撑计划（242Q2201Z）; 河北省高等学校科学技术研究项目（ZD2022028）; 邢台市重大科技专项（2023ZZ017）
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