滚动轴承异音信号的测试评估与分析-测试计量技术及仪器专业论文.docxVIP

Abstracts Rolling bearing is a mechaniωI accessory that used veηcommonly and ωsively. 115 dynamic performance determines the host m配 hinesω阴阳lity. At the S町1e time，the vi弘ration and noise grade ofthe bearing is a very important index，which scales the beari鸣s dyn皿lC pe巾rmance. AIthough the noise grade of rolling beari咆 has been betler controlled ，theωne performance ofbearing made in our co 四try has an obvious g叩∞mpared with th础 of forei启n counties. Bearings made in our co阳的y especiaUy lower nαse bearing will often se时 out abnormal soun.d. This phenomenon 缸oused lhe disconte 叽ment ofbe缸ing user，and has been a bc 工 l，巳k that res 到 cts the ? further development of our bearing ind凶缸子 B泡use the study 倒d ，。由。I of be 町ngs abnormal sound develop iater and people have not give enough emphasis on the bearing lone，this paper firstiy discuss the essential concep忧 and prop四y of 出.e be缸ings abnc 口nal sound in order 10 let us have a better underslanding ofthe new concept Therere many differences between abnormai SOl1nd of bearing and nonnal noise Abnorrr昭1 sound hωclose 创ationship with hearing psychology of person ， siml.lltaneously 出epωples heari吨%臼n response 10 the physic础严rameter of sound wave dire 时乳白 this 缸ticle lend 10 analyses the chara鸥在:r property of abnormal sound from the aspect of 阿由lOgical acoustics and phys 叫 acoU5UC旦叽l!Ough th白山dy 1 町 ωfound the mat业 .ematical rela立。因 hip b 巳tween 白白巾ration phy吼叫归，=，时 of sOlmd so田ce and the wave physical parameter. Tlús re!ation eql山泣ion offers the theoretic foundation ，which enabie us 10 use 世te eXlslmg te划lIlg mstn皿ent 10 detect and identi今也e abnonnal sound ofrolHng bearing Abnormal sound of rolli口19 bearing Is an weak transient signaI 呻ich may be easíly overwhelmed by the ba刷ckground n盹e .The nOlse of strong ene唱 y will d应归rt 也e original signal，50 the design 1eve1 oftesting syste.由自由巳 chief 民初ωr which detennine the precision of detecting 也e abnormal sound. 1bìs artì c\e discuss the vibrat