How long the high-speed spindle bearing can be used is usually determined by factors such as bearing performance and wear resistance. If there are the following defects, it can no longer be used, and the bearing must be replaced. If any of the outer ring, inner ring, rolling elements, and cage has cracks or gaps, it cannot be used any longer. Wear failure is one of the common failure modes of various bearings. According to the damage mode, it can be generally divided into the most common abrasive particle damage and adhesive wear. We can judge whether the bearing has reached wear failure according to the following technical means. 1. Technical characteristics of oil film resistance diagnosis: It can be tested according to a standard for various environments, and the actual effect of diagnosis of abnormalities such as surface peeling, embossing, and cracks is poor. Application scope of high-speed spindle bearings: suitable for places where the rotating shaft is exposed. 2. Technical characteristics of vibration diagnosis: the key technology of vibration diagnosis is widely used; online diagnosis can be completed; the diagnosis speed is relatively fast, and the diagnosis result is also very perfect. Application field of high-speed spindle bearings: especially suitable for common fault detection of high-speed spindle bearings in rotating machinery equipment. 3. Technical characteristics of ferrography diagnosis: no need to solve problems for equipment; low project investment, very good effect; can detect the initial fatigue failure of oil-free bearings; can do scientific research on damage principles. Application scope of high-speed spindle bearings: It is suitable for common fault diagnosis of grease-lubricated bearings, but it is more difficult for grease-lubricated bearings. 4. Technical characteristics of temperature diagnosis: simple diagnosis; effective in judging bearing burns. Application scope of high-speed spindle bearings: It is suitable for simple and basic diagnosis of bearings in equipment. 5. Technical characteristics of optical fiber detection and diagnosis: relatively high sensitivity; frequency stability; immediate feedback of bearing manufacturing quality, surface damage level, load, lubrication and clearance status. Application range of high-speed spindle bearings: suitable for equipment that can install sensors in bearing housings. 6. Technical characteristics of acoustic emission diagnosis: fast speed, simple operation; support online detection. Application scope of high-speed spindle bearings: The application of new technologies that have developed in recent years is rarely used in the detection of high-speed spindle bearings. High-speed spindle bearings, accurate torque, can turn stably! Only when the torque is accurate can the rotation be stable!
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