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采用自行研制的径向轴承微载荷摩擦试验机研究了微载荷下径向含油轴承的摩擦性能,采用小波方法对试验数据进行滤波降噪.结果表明,含油轴承在稳定微载荷状态下的瞬态摩擦系数不固定,且随着润滑剂、轴承转速、径向载荷与混合润滑状态等因素而变化.在微载荷状态下,当600 r/m in、采用液晶添加剂(5CB)与46号机械油以体积比1%~2%配制的润滑剂润滑时,平均摩擦系数达到最小值;当转速从600 r/m in增至3 000 r/m in时,平均摩擦系数由小变大、再变小;瞬态摩擦系数随着载荷从0.5 N增至10.0 N呈现高-低-稳定的变化趋势.与混合润滑状态相比,充分润滑下的摩擦系数较大;当混合润滑时,在主轴转速为1 500~2 400 r/m in下的摩擦系数出现不稳定.
The friction performance of the radial oil-impregnated bearing under the micro-load was studied by a self-developed radial bearing micro-load friction tester, and the wavelet-based method was used to filter the noise of the test data.The results show that the transient state of the oil- The coefficient of friction is not fixed, and with the lubricant, bearing speed, radial load and mixed lubrication conditions and other factors in the micro-load conditions, when the 600 r / m in, using liquid crystal additives (5CB) and 46 mechanical oil The average friction coefficient reached the minimum when lubricated with 1% ~ 2% by volume of lubricant. When the rotation speed increased from 600 r / m in to 3000 r / m in, the average friction coefficient increased from small to large, The transient friction coefficient showed a high-low-steady trend with the load increasing from 0.5 N to 10.0 N. Compared with the mixed lubrication state, the friction coefficient under full lubrication was larger; when mixed lubrication, The friction coefficient of 1 500 ~ 2400 r / m in instability.