Design and Process Parameter Optimization of Double Helix Flow Channel for Polar Hot Rollers

YAN Huajun; ZHOU Xuhang; YANG Guang; DAI Xuerui; YUAN Zhen'ge; WANG Baoyu; LIU Jinping; ZHOU Xingbang

doi:10.3969/j.issn.1674-6457.2025.07.023

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Journal of Netshape Forming Engineering ›› 2025, Vol. 17 ›› Issue (7) : 219-227. DOI: 10.3969/j.issn.1674-6457.2025.07.023

Advanced Manufacturing Technology and Equipment

Design and Process Parameter Optimization of Double Helix Flow Channel for Polar Hot Rollers

YAN Huajun^1a,1b,1c,1d, ZHOU Xuhang^1d, YANG Guang^1a,1b,1c,*, DAI Xuerui^1d, YUAN Zhen'ge², WANG Baoyu³, LIU Jinping³, ZHOU Xingbang^1d

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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.

Key words

battery pole plate / thermal simulation of roller / double helix flow channel / unequal spacing flow channel / temperature uniformity

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YAN Huajun, ZHOU Xuhang, YANG Guang, DAI Xuerui, YUAN Zhen'ge, WANG Baoyu, LIU Jinping, ZHOU Xingbang. Design and Process Parameter Optimization of Double Helix Flow Channel for Polar Hot Rollers[J]. Journal of Netshape Forming Engineering. 2025, 17(7): 219-227 https://doi.org/10.3969/j.issn.1674-6457.2025.07.023

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