制动器外文翻译 盘式制动试验台上测量空气中磨损颗粒2.docVIP

本科生毕业设计（论文）外文翻译 毕业设计（论文）题目：几种典型的制动器的对比分析与设计 外文题目：A disc brake test stand for measurement of airborne wear particles 译文题目：盘式制动器试验台上测量空气中磨损颗粒 学 生 姓 名： 专 业： 车辆工程 指导教师姓名： 评 阅 日 期： A disc brake test stand for measurement of airborne wear particles ABSTRACT During braking, there is wear on both the rotor and the pads. This process generates particles that may become airborne. In fi eld tests, it is diffi cult to distinguish these particles from others in the surrounding environment.Therefore, a laboratory test stand has been designed which allows control of the cleanliness of the surrounding air. The test stand consists of a front right brake assembly mounted in a sealed chamber. A braking load is applied by a pneumatic system and the rotor, which has been pre-conditioned with a rust layer to simulate a car standing parked overnight in a wet environment, is driven by an electric motor. The number and size of airborne wear particles are then measured. This experimental set-up has been verifi ed by an initial test series performed at low braking loads. The results suggest that this test stand can be used to study rust layer removal from the rotor. key words: wear; airborne particles; disc brake; test stand; rust layer INTRODUCTION Many studies have shown an association between adverse health effects and the concentration of airborne particles in the atmosphere.1–3 In urban environments, airborne particles can come from different sources, e.g. demolition and construction,4 resuspended road dust,5 wheel-to-rail contact,6,7 car-to-road contact8,9 and disc brakes.10,11 During braking, both the brake pads and rotors are worn, generating wear particles. Some of these particles are deposited on the brake hardware, and others become airborne. Furthermore, to ensure robust brake performance, some brake systems may require the pads to frequently be