滚动轴承润滑脂的噪声特性及低噪声脂的合成

ROLLING BEARING GREASES'NOISE FEATURE AND DEVELOPMENT OF LOW NOISE GREASE

通过研究锂基脂的组成及合成工艺对润滑脂的噪声影响、分析润滑脂的结构,掌握滚动轴承润滑脂的噪声特性,合成低噪声脂。分别采用轴承振动(速度)法和轴承振动(加速度)法对合成的脂进行噪声值测试,并对合成的锂基脂各项理化指标进行测试。采用扫描电镜,通过冷冻复型法分析润滑脂产生噪声的原因。发现以酯类油与环烷基矿物油的混合油做基础油时,合成的锂基脂具有较好的噪声特性。基础油为矿物油时,采用控温慢冷法合成的锂基脂具有较好的噪声特性;基础油为酯类油与矿物油的混合油时,采用自然冷却法合成的锂基脂具有较好的噪声特性。通过综合考察润滑脂结构、滚动轴承振动噪声值及各项理化指标值,确定降噪效果较好的润滑脂组成及制备工艺,合成一种低噪声滚动轴承锂基脂,并对该脂的轴承寿命进行测试。

To grasp the rolling bearing greases＇ noise feature and develop a low noise grease, the influence of lithium greases＇ components and technological process on greases＇ noise character are inspected, and the greases＇ structure are analyzed. The grease＇s noise are measured by bearing vibrating （velocity） method and bearing vibrating （acceleration） method, and every physics and chemistry index are tested. How the greases＇ noise are caused is analyzed by scan electronic microscope through cooling resuming prototype method. To find that mixture of naphthenic mineral oil and ester oil as base oil, the grease has a proper noise character. Mineral oil as base oil, the grease taking controlled temperature cooling method has a good noise feature, mixture of naphthenic mineral oil and ester oil as base oil, natural cooling grease＇s noise is lower. The grease＇s structure, rolling bearing＇s vibrating noise, physics and chemistry index are studied all together, a proper component and technics are decided, a low noise lithium grease is developed and it＇s bearing life is tested.