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为观察和鉴定滚动轴承的噪声,我们试制了一台轴承噪声比较仪,在不具备专用噪声测试装置的情况下,作为目前测量轴承噪声的临时性措施。以兄弟厂同型号高质量轴承作为比较对象,找出我厂生产轴承与兄弟厂同类先进产品的差距。在原理上采用了电磁感应传动,使被测轴承自身产生一定的转速,发出摩擦振动的噪声讯号,送到拾音装置,经过多级电子放大器,以仪表指示输出噪声电频,并由扬声器监听噪声响度(图1)。采用电磁感应传动是为了消除一般采用机械摩擦传动所产生的噪声干扰。在电子放大器中考虑了平滑滤波和积分电路,使输出电路反映出平均值,而不是瞬时变动(图2、3)。
In order to observe and identify the noise of rolling bearings, we made a trial of a bearing noise comparator, in the absence of a dedicated noise test device, as the current measurement of bearing noise temporary measures. Brothers factory with the same type of high-quality bearings as a comparison object, to find out the difference between our factory production of bearings and brother factory of similar advanced products. In principle, the use of electromagnetic induction drive, the measured bearing itself to produce a certain speed, the issue of friction and vibration noise signal sent to the pickup device, after a multi-stage electronic amplifier to meter output noise frequency, and monitored by the speaker Noise loudness (Figure 1). The use of electromagnetic induction drive is to eliminate the general use of mechanical friction transmission noise generated. Smoothing filtering and integrating circuits are considered in the electronic amplifier so that the output circuit reflects the average, not the momentary variations (Figure 2, 3).