Comparison of simplex and duplex drum brakes linings with transverse slots in vehicles

IF 1.5 4区工程技术 Q3 ENGINEERING, MECHANICAL

Proceedings of the Institution of Mechanical Engineers Part D-Journal of Automobile Engineering Pub Date : 2024-09-18 DOI:10.1177/09544070241272796

Yasser Fatouh

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Abstract

In this paper, experimental comparison between Simplex and Duplex drum brake units performance for three different drum lining profile designs is carried out. The three linings profiles are normal (no slot), with one slot and with three slots. In this study, brake test rig has been designed to represent the actual braking process environment. Brake oil pressure and drum speed are the operational parameters that are varied during the experimental work. From the experimental work and mathematical models for brake force, brake factor, and final friction temperature, the comparisons were carried out. The final conclusions indicate that lining with one slot profile is the most suitable, since the percentage improvement of mean brake force and brake factor of duplex drum brake (D) linings versus simplex drum brake (S) linings reaching 84.09% and 82.73% higher than three slots lining profile but lower than lining with normal profile at low pressure 5 bar and low speed 50 rpm. Also, the percentage improvement of mean primary shoe final friction temperature reduction for the one slot profile reaches 30.00% higher than normal lining profile but lower than lining with three slots profile at high pressure 20 bar and drum speed 50 rpm.

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车辆中带有横向槽的单片式和双片式鼓式制动器衬片的比较

本文对三种不同鼓式衬片轮廓设计的单缸和双缸鼓式制动器性能进行了实验比较。三种衬片轮廓分别为普通（无槽）、带一个槽和带三个槽。在这项研究中，制动试验台的设计代表了实际制动过程的环境。制动油压和制动鼓转速是实验过程中变化的运行参数。根据实验工作和制动力、制动系数和最终摩擦温度的数学模型，进行了比较。最终结论表明，在低压 5 巴和低速 50 转/分的条件下，双联鼓式制动器（D）衬片与单联鼓式制动器（S）衬片相比，平均制动力和制动系数的提高百分比分别达到 84.09% 和 82.73%，高于三槽衬片，但低于普通衬片。此外，在高压 20 巴和鼓速 50 转/分的条件下，单槽型材的平均主蹄最终摩擦温度降低率比普通衬片型材高出 30.00%，但低于三槽型材衬片。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Proceedings of the Institution of Mechanical Engineers Part D-Journal of Automobile Engineering 工程技术-工程：机械

CiteScore

4.40

自引率

17.60%

发文量

263

审稿时长

3.5 months

期刊介绍： The Journal of Automobile Engineering is an established, high quality multi-disciplinary journal which publishes the very best peer-reviewed science and engineering in the field.