特大型軸承內(nèi)圈斷裂原因分析及預(yù)防措施

打開文本圖片集

摘要：軸承在安裝過程中出現(xiàn)內(nèi)圈貫穿斷裂，通過宏觀檢查、斷口分析、化學(xué)成分分析、金相檢測、材料及熱處理質(zhì)量檢測，對其斷裂原因進行了分析。結(jié)果表明：該套軸承內(nèi)圈心部存在局部鍛造過燒缺陷，該軸承在安裝受力時，沿缺陷部位貫穿斷裂。

關(guān)鍵詞：特大型軸承；早期失效；貫穿斷裂；斷口分析；鍛造過燒

Cause analysis and preventive measures of fracture of oversize bearing inner ring

WANG Chan， WU Yonggang， ZENG Chaofan

State Key Laboratory of Aviation Precision Bearing， Luoyang LYC bearing Co.， Ltd.， Luoyang 471039， Henan， China

Abstract： The fracture of inner ring occurs in the process of bearing installation， the cause of the failure was analyzed by means of macro-examination， fracture analysis， chemical composition analysis， metallographic examination， material and heat treatment quality testing. The results show that the inner ring of the bearing has a partial forging overburn defect， and the bearing breaks along the defect during installation.

Keywords： oversize bearing; early failure; through fracture; fracture analysis; forging overburning

1 序言

在大型機械設(shè)備中，滾動軸承是最為關(guān)鍵的核心零件之一，若軸承出現(xiàn)故障，不僅會影響機械設(shè)備的正常工作，而且會帶來極為嚴(yán)重的安全隱患[1]。（剩余2056字）