Design method for reducing wind resistance of tire based on rim protection

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Design method for reducing wind resistance of tire based on rim protection

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LI CUI / ZHEN SUXIA / PAN TING / GAO NAN / CHEN YUN / WEI DONGDONG

The invention discloses a tire wind resistance reducing design method based on rim protection, which comprises the following steps: S1, calculating the minimum value by using a rim protection area formula, S2, calculating the width value of a rim protection platform when the minimum value of the rim protection area is taken, s3, the corresponding relation between the width of the widest protruding portion of the rim protection and the flange width of the rim, the corresponding relation between the radius of the lower side arc of the rim protection and the thickness of the thickest point of the rim protection and the corresponding relation between the radius of the lower tire side arc and the thickness of the thickest point of the rim protection are determined; the problems that in an existing design method, an optimized sidewall design is usually adopted, when air flows through grooves and fluctuates back and forth between protrusions, a small piece of turbulent flow or air disturbance is generated, the air is separated and then attached, the wind resistance is reduced, and the purpose of reducing the wind resistance is achieved by reducing the tire grounding width and optimizing the pattern pitch and the pitch width are solved. And the two design methods are not suitable for tires needing rim protection design.

本发明公开了一种基于轮辋保护的轮胎降低风阻设计方法，S1：利用轮辋保护区域面积公式计算其最小值，S2：计算轮辋保护区域面积取最小值时轮辋保护平台宽度值，S3：确定轮辋保护凸出最宽处宽度与轮辋的凸缘宽度、轮辋保护下侧弧半径与轮辋保护最厚点厚度及下胎侧弧半径与轮辋保护最厚点厚度的对应关系；解决了现有的设计方法中常采用优化胎侧设计，当空气流过凹槽，在凸起之间来回起伏，产生一小块湍流或空气扰动，空气经过分离再附着的过程减小风阻以及采用通过减小轮胎接地宽度，优化花纹节距和节宽以实现降低风阻的目的，这两种设计方法都不适用于需要轮辋保护设计的轮胎的问题。