The invention relates to a combination non contact seal for the axle box bearing of high speed EMU, which is multiple bending structure. The large outer surface is matched with the sealing groove of the bearing outer ring. There is a gap between the inner diameter surface and the seal seat. The seal flanges of the inner diameter are inserted into the grooves composed of the seal seat and the inner ring of the shaft bearing, and the seal is sealed with the seal. There is a gap on the surface of the inner ring of the bearing and the inner ring of the bearing; the inner ring is \Z\, and the outer surface is in interference with the upper surface of the \U\ shaped cavity of the outer skeleton, and there is a gap between the inner diameter surface and the inner ring of the bearing. Using the invention, multiple non contact seals are formed on the surface of the bearing inner ring and the seal seat by the combination of the outer skeleton and the inner retaining ring. The groove of the inner diameter of the outer skeleton and the bearing inner ring and the seal seat form a \protective wall\ seal, which can effectively prevent the external impurity from invading by the flow body effect produced by the bearing rotation. The leakage of inlet and bearing lubricants is simple and compact, and has the advantages of contact seal and non-contact.
【技术实现步骤摘要】
一种用于高速动车组轴箱轴承的组合非接触式密封
本专利技术涉及一种专用轴承密封,特别涉及到一种用于高速动车组轴箱轴承的非接触式密封。
技术介绍
高速动车组轴箱轴承是动车组转向架的关键零部件,其速度、寿命和可靠性等性能直接影响着车辆运行的可靠性与安全性。轴承密封是轴箱轴承的重要组成部分,与轴箱轴承的高速、长寿命和高可靠性能密切相关。国内高速动车组轴箱轴承产品,包括轴箱轴承专用密封尚属空白。现有的轴承密封技术主要有接触式密封和非接触式密封。接触式密封采用两接触副紧密接触甚至施加弹簧约束力的方式以达到较好的密封效果,可有效阻止油脂泄露和外界杂质的入侵,但会产生较大的摩擦,不能适应高速的使用要求,同时摩擦发热会影响轴承寿命和可靠性。非接触式密封采用两密封界面留有一定间隙的密封方式以达到无接触摩擦的效果,能够适应较高的运转速度,但会产生油脂泄漏和外部污染物的入侵的风险,影响轴承的寿命和可靠性。国外高速动车组轴箱轴承产品,包括轴箱轴承专用密封已有成熟产品,但相关技术严格保密,尚未公开其专用密封技术及产品。
技术实现思路
本专利技术为解决上述问题,提供一种用于高速动车组轴箱轴承的组合非接触式密封。本专利技术解决上述技术问题采用的技术方案是:一种用于高速动车组轴箱轴承的组合非接触式密封,其特征在于该密封由外骨架、内挡圈组合而成,与轴承内圈和密封座组成密封副;外骨架呈多重弯曲结构,具有大外径面、“U”形腔、密封内径面和密封翻边,大外径面与轴承外圈密封槽配合,内径面与密封座之间存在间隙,内径的密封翻边伸入密封座与轴承内圈组成的凹槽内,并与密封座和轴承内圈相关表面都存在间隙;內挡圈呈 ...
【技术保护点】
一种用于高速动车组轴箱轴承的组合非接触式密封,其特征在于该密封由外骨架、内挡圈组合而成,与轴承内圈和密封座组成密封副;外骨架呈多重弯曲结构,具有大外径面、“U”形腔、密封内径面和密封翻边,大外径面与轴承外圈密封槽配合,内径面与密封座之间存在间隙,内径的密封翻边伸入密封座与轴承内圈组成的凹槽内,并与密封座和轴承内圈相关表面都存在间隙;內挡圈呈“Z”形结构,外径面为配合面并与外骨架的“U”形腔上表面过盈配合,组合为一体,内径面与轴承内圈存在间隙。
【技术特征摘要】
1.一种用于高速动车组轴箱轴承的组合非接触式密封,其特征在于该密封由外骨架、内挡圈组合而成,与轴承内圈和密封座组成密封副;外骨架呈多重弯曲结构,具有大外径面、“U”形腔、密封内径面和密封翻边,大外径面与轴承外圈密封槽配合,内径面与密封座之间存在间隙,内径的密封翻边伸入密封座与轴承内圈组成的凹槽内,并与密封座和轴承内圈相关表面都存在间隙;內挡圈呈“Z”形结构,外径面为配合面并与外骨架的“U”形腔上表面过盈配合,组合为一体,内径面与...
【专利技术属性】
技术研发人员:曾献智,高武正,郭向东,方乾杰,王梦茵,柴灵芝,
申请(专利权)人:中浙高铁轴承有限公司,
类型:发明
国别省市:浙江,33
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