摘要
滚动轴承振动与噪声对环境的污染,一直是轴承工程界关注的问题。由于噪声测量要求的环境特殊,因此迄今为止轴承制造厂是通过控制振动来间接控制噪声的,这种轴承实际上是"低振动轴承"而不是"低噪声轴承"。虽然振动可以产生噪声,但静音机械产品所使用的轴承必须是低的声压级,另外,振动和噪声的测量标准很难具有一致性,从而导致所测量出的声压级和振动有效值没有显著的统计关系。为了直接控制轴承噪声,必须研究噪声的声场问题。现以声学的基本原理为依据建立了轴承声压级的数学模型,并结合6201-2RZ和6203-2RZ两种轴承进行了实验验证。结果表明,所建立的轴承声压级数学模型的预测误差很小,仅有4dB。
Environmental pollution caused by the vibration and the noise of rolling bearings is a focus of attention in the bearing-engineering domain at all times. So far, the noise is controlled indirectly by controlling the vibration because of a particular condition required in measuring the noise for bearing manufactory, and corresponding bearings are actually low vibration beatings and are not low noise bearings. The vibration can produce the noise, but the sound press level of bearings used in silence-run machines must be low, and besides, some inconsistencies of the measuring standards induce that the sound press level of the noise and the virtual value of the vibration have not remarkable correlativity in statistics. For the sake of direct controlling the noise of bearings, the sound field of the noise must be studied. Based on the principle of acoustics the sound-press-level model of bearings is established and is validated by experimentations on two kinds of bearing, 6201—2RZ and 6203—2RZ. The results indicate that the forecast error for the noise of the bearings studied is small and only 4dB.
出处
《哈尔滨轴承》
2003年第2期6-12,共7页
Journal of Harbin Bearing
基金
机械工业部机械工业技术发展基金(97JA0803)
河南省科学技术成果(9412003Y0076)
