盘式制动器在不同制动模式下的热-机耦合行为研究  

Study on Thermal-mechanical Coupling Behavior of Disc Brake System Under Different Braking Modes

作　　者：袁琼[1] YUAN Qiong(School of Vehicle Engineering,Chongqing Industry Polytechnic College,Chongqing 401120,China)

机构地区：[1]重庆工业职业技术学院车辆工程学院,重庆401120

出　　处：《机械科学与技术》2024年第3期446-456,共11页Mechanical Science and Technology for Aerospace Engineering

基　　金：重庆市自然科学基金面上项目(cstc2020jcyj-msxmX1016);重庆市教委科学技术研究项目(KJQN202203202)。

摘　　要：对盘式制动器在拖曳制动、紧急制动和缓慢制动这3种不同制动模式下的热-机耦合行为进行分析。结果表明,在拖曳制动模式下,制动盘两侧摩擦片的变形形式各不相同,因此制动盘两侧摩擦片的温度分布不一致。此外,钳指侧和活塞侧摩擦片的振动信号和接触力信号差异明显,钳指侧对摩擦副的摩擦振动逐渐加剧,并产生新的振动频率;活塞侧对摩擦副的振动趋于稳定,原有的振动频率逐渐消失;在紧急制动模式下,制动盘两侧摩擦片的温度分布特征类似,均是从进摩擦区向出摩擦区扩散,但是由于作用时间较短,温度上升不明显。但两侧摩擦片的振动信号有所区别,尤其是活塞侧摩擦片出现持续自激振动,并且产生新的振动频率。在缓慢制动模式下,虽然制动盘两侧的摩擦片外径均为表面高温区,但在制动后期,活塞侧摩擦片表面高温排布呈现出“点状分布式”特点。钳指侧摩擦片和活塞侧摩擦片的振动信号存在差异,钳指侧摩擦片振动持续时间较长,但其振动强度较活塞侧则更加微弱。界面力学信号分析结果很好地验证了该结论。Thermal-mechanical coupling behaviour of disc brake under three different braking modes,namely drag braking,emergency braking and slow braking,is analyzed by using the full thermal-mechanical coupling analysis method.The results show that under the drag braking mode,the temperature distribution of friction pads on both sides of the disc is inconsistent,which is caused by the different deformation forms of friction pads on both sides of brake disc.In addition,the vibration signals and contact force signals of the friction pad between the finger side and the piston side are obviously different.The friction-induced vibration of the pad on the finger side of the disc gradually becomes intensified,and a new vibration frequency is generated,while the vibration of pad on the piston side tends to be stable and the original vibration frequency disappears gradually.In the emergency braking mode,the temperature distribution characteristics of the friction pads on both sides of the brake disc are similar,which are diffused from the inlet friction zone to the outlet friction zone,but the temperature rise is not obvious due to the short time period of action.However,the vibration signals of the friction pads on both sides are totally different,especially that the pad on piston side generates visible and continuous self-excited vibration,and the new vibration frequency is generated.In the slow braking mode,although the outer diameters of the friction pads on both sides are the surface high temperature zone,the high temperature distribution on the surface of the piston pad presents the characteristics of‘point-like distribution’in the late braking period.The vibration signals of the friction pad on the finger side are different from those on the piston side.The vibration duration of the friction pad on the finger side is longer,while its vibration intensity is weaker than that on the piston side.The results of interface mechanical signal analysis confirm the conclusion.The results of this study confirm that the thermal-mecha

关 键 词：热-机耦合 制动 摩擦振动 接触温度 

分 类 号：TH113.1[机械工程—机械设计及理论]