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Bearing's "noise reduction skill explanation"

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1 Skills summary According to bearing knowledge, bearing noise is an important source of pollution for the environment; it is also an important guideline for bearing professional demand control; especially for home appliances; working machinery, instrumentation, bearing noise limit is more outstanding. For more than ten years; China bearing Occupation has done a lot of work in reducing bearing noise; it has made great progress in the level of bearing noise reduction; but compared with foreign countries; there is still a certain distance; the user reflects the outstanding problem of abnormal sound; that is, the bearing work presents an irregularity. The sudden sound; even the scream. The bearing noise has many influence factors; it is also very messy; the demand is drawn from the whole of the bearing; the inner ring, the outer ring, the cage, the tumbling body and the lubricating oil (fat) of each part of the bearing go Analysis and discussion; also need to analyze the research from the data used in each part of the bearing, the process of the processing process and even the equipment and process materials selected in the project. This is the basic content touched by the bearing noise skill.
2 The main discussion content and guidelines In order to deal with the bearing “uneven” problem and make the level of vibration drop to a new level; add the control amplitude limit to the skill standard; thus; the primary discussion is to improve the roll of the external body and the ring raceway. Degree; the smoothness of the guide between the treatment cage and the tumbling body; together reduce the impurity particle size of the grease (oil); the balance with the corresponding tumbling surface touch. The required roll and raceway roughness control is 0. 001μm, the impurity particles of the grease is not more than 0. 01 μm, and the roundness of the ball socket of the cage is improved; the precision of the turbulence between the cage and the roll body is 0.11 μm.
3 The development of trend skills at home and abroad is endless; although the level of bearing noise reduction of foreign leading bearing companies (NSK, SKF, etc.) is already high; however, further development is proposed; that is, the development of “silent” bearings The trend of noise products in China's bearing products in the next decade is: first, to deal with the "alien sound" of the bearing; second, to make the level of vibration reduction a new level; that is, to catch the bearing of foreign leading industrial countries in the late 1990s s level.

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