By AST Bearings
对安静的电动机的需求（意味着，噪音和振动都很少的运行方式）是推动工程师开发和销售低噪声滚珠轴承的主要应用。因此，制造设备行业创造了电动机质量（EMQ）一词，以识别这种特殊的低噪声轴承。Today, a wide range of applications require the use of EMQ bearings.
Where the noise comes from
旋转轴承中的噪声是振动的可听见成分，也是旋转速度的函数。振动越大，轴承的寿命越短 - 此外，过多的振动能够损坏电动机或机械。
Vibration is caused by several factors, including, rough or damaged raceway and ball surfaces, poor geometric tolerances (roundness, concentricity, runout, and/or parallelism), contamination, improper lubrication, incorrect radial play, and improper shaft and housing fits.
How we reduce the noise
EMQ轴承是通过将滚动触点表面超过镜面状饰面来制造的，从而提供了非常光滑的旋转。同样重要的是保持对轴承成分的几何公差的严格控制。
轴承中的颗粒污染增加了噪声水平 - 工程师可以通过使用密封来防止污染物的入口并注意仅使用已过滤的“清洁”润滑剂来防止这种情况。指定适当的径向清除也至关重要：它应尽可能接近零，而不会导致轴承在旋转过程中结合。如果径向间隙太松，则会导致过度引起噪声的振动。
As with any type of bearing, the lifespan of EMQ bearings also depends on external factors. Great care should be taken during handling and mounting because impact forces from dropping a bearing or hitting it during installation can create small dents in the raceways, called brinelling. Brinelling creates excessive vibration during rotation, eventually leading to bearing failure.
Shaft and housing roundness can also contribute to noise, especially in smaller and thin-section bearings. Poor roundness can distort the bearing rings upon installation, which prevents smooth rotation and leads to the generation of noise.
Manufacturers of EMQ bearings typically perform 100% noise inspection on the bearings using a special piece of equipment called the Anderon meter (or a similar instrument). This device measures the vibration velocity (displacement x frequency) of a rotating bearing in Anderon units (equivalent to 7.5 microns per second) across three frequency bands: low, medium, and high. The higher the vibration velocity, the noisier the bearing.
最后，重要的是要强调这样一个事实，即EMQ标准在轴承制造商之间并不统一，除了位于国家标准的中国的标准。尽管缺乏统一性，但您可以放心，制造商的EMQ等级（基于足够的经验证据）表明该轴承适用于电动机中。
AST Bearings
www.astbearings.com
Filed Under:轴承提示
