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How to judge the failure of the KOYO roller bearings from the sound

wallpapers News 2021-04-14
About KOYO roller bearings
KOYO (Koyo Seiko Corporation) was founded in 1921 which is a research and development type integrated function product manufacturing company in Japan, with 6557 employees? Koyoseiko is one of the four major bearing production groups in Japan. With the world's top production and control equipment, Koyoseiko owns eight main production plants in Japan, including Tokyo, Nara, Yoda, Toyobashi, Takamatsu, Tokushima and Keisama, all of which have passed ISO9001 certification. Overseas across Europe, Asia, North and South America several production sites and research institutions. Koyo Seiko Corporation and Toyoda Industrial Machinery Corporation merged on January 1, 2006, and the new company was named JTEKT Corporation (JTEKT).
How to judge the failure of the KOYO roller bearings from the sound?
When the rolling bearing works, under normal circumstances, the operation is smooth, light, free, and noise is harmonious and no noise, and uniform and continuous "splash" sound, or lower sound, noise intensity is not large. So how do we judge when the KOYO bearing is defective?
First, when the KOYO bearing produces a uniform and continuous friction, it contains an irregular metal vibration that is independent of the rotational speed. Generally, the bearing fat content is insufficient, and it should be supplemented. If the device is stopped for a long time, especially in cold winter temperatures, the KOYO bearings sometimes make a "humming and Shasha" sound during operation, which is smaller than the smaller radial gap and lower lubricating pin. related. The bearing gap should be adjusted appropriately, and the new grease inserted with a large insert needle should be replaced.
Second, when the KOYO bearing is found to produce a low sound, this sound is caused by the scratches, trenches and rust spots on the rolling bodies and inner-outer rows. The cycle of sound is proportional to the speed of the KOYO bearings. The bearing should be replaced.
Third, the discontinuous sound produced by the bearing is caused by the cage or inner ring and the outer ring. The KOYO bearings must be stopped and replaced immediately.
Fourth, when the bearing is discovered, the uneven friction is caused by impurities such as iron, sand, and the like. The sound is small and there is no relationship with the number of revolutions. KOYO bearings should be cleaned, refuel or replace.

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