陶瓷密封环旋转摩擦噪声特性研究  

A study on the characteristics of rotating friction-induced noise of ceramic seal rings

作　　者：王开心 胡长明[2] 张幼安[2] 张艳[1] 孙蓓蓓[1] WANG Kaixin;HU Changming;ZHANG Youan;ZHANG Yan;SUN Beibei(School of Mechanical Engineering,Southeast University,Nanjing 211189,China;Nanjing Institute of Electronic Technology,Nanjing 210039,China)

机构地区：[1]东南大学机械工程学院,南京211189 [2]南京电子技术研究所,南京210039

出　　处：《振动与冲击》2024年第16期211-218,共8页Journal of Vibration and Shock

基　　金：国家重点研发计划(2019YFB2006404);江苏省工业和信息产业转型升级转型资金项目(7602006021)。

摘　　要：旋转机械密封采用的陶瓷密封环在航空航天领域应用广泛,但其干摩擦产生的噪声问题一直未得到解决。以陶瓷密封环为研究对象,在旋转摩擦试验台上通过振动加速度传感器和精密拾音器等测得振动与噪声信号,分析了陶瓷密封环的旋转摩擦随机啸叫的特点和产生机理。试验结果表明,振动加速度的倍频响应与高频啸叫关联,转动速度是影响振动和啸叫特征频率的主要因素。根据试验建立密封环的有限元仿真模型,采用瞬态动力学分析方法,得出的各转速特征频率与试验较为吻合;获得摩擦表面的接触压力,发现转动时摩擦接触界面的反复分离-附着现象,这被认为是试验中啸叫的主要机制。另外转速越大,接触压力越大,从而可推断出摩擦力越大,其诱发的啸叫声压级更大,这与试验测得转速和声压级正相关关系吻合。The ceramic seal ring used in the rotary mechanical seal is widely used in the field of aerospace,but the noise problem caused by dry friction has not been solved.Taking the ceramic sealing ring as the research object,vibration and noise signals are measured on the rotary friction test bench through vibration acceleration sensors and precision pickups,and analyze the characteristics and mechanism of the random roaring of rotary friction of ceramic seal rings.The test results show that the frequency doubling response of vibration acceleration is associated with the high-frequency roar,and the rotation speed is the main factor affecting the characteristic frequency of vibration and whistling.According to the test,a finite element simulation model of the sealing ring is established.Using the transient dynamic analysis method,the characteristic frequency of each rotational speed is relatively consistent with the test;after obtaining the contact pressure of the friction surface,the repeated separation-attachment of the friction contact interface during rotation is found,which is considered to be the main mechanism of roaring in the experiment.In addition,the greater the rotation speed,the greater the contact pressure,so it can be inferred that the greater the friction force and the higher the roaring pressure level induced by it,which is consistent with the positive correlation between the rotational speed and the sound pressure level measured in the test.

关 键 词：陶瓷密封环 旋转摩擦 高频啸叫 摩擦振动 接触压力 

分 类 号：TK513.5[动力工程及工程热物理—热能工程]