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  Mechanical bearings used in the process, "what sign, bearing is doomed to be damaged?"

  A bearing failure in the machine has four stages:

  In the first phase (or early detection using vibration analysis), the signal will appearin the frequency band of approximately 250 to 350,000 kHz (kilohertz).

  In the second stage, signal from 500 to 2000 Hertz (frequency) will start to ring.

  At the beginning of the third stage, the harmonics of the fundamental frequency will be very obvious. In the race now obvious defects will be visible to vibration analysisof noise signal. In this connection, there will also be a significant temperature rise.

  In the fourth stage, will have a higher vibration. Fundamental frequency and harmonics are as random noise to reduce ultrasound. Temperature as the bearing to self-destruct.

  So, the answer is Yes. There are clear warning signs we bearings is failed. The real question is, "do you know what device to monitor mechanical bearing?" In bearing the most popular today, high technology for machinery vibration analysis, oil analysis, ultrasound and infrared thermal imager. We can use this tool to compare the current state of the historical data and accurate assessment of the residual life of the bearing.

  Vibration analysis and prediction of oil analysis is considered the best bearing fault diagnosis tools, but may not be the most cost effective. Bearing manufacturers had long known relation of bearing life and temperature. They even have formulas work very well in a safe operating temperature calculations. These formulas and calculations indicate that, once a bearing running in the desired temperature range, its life began to fall, accelerated. (Remember, each above 15 degrees Celsius to 70 degrees Celsius, oil-based operation, which has reduced life expectancy by more than half. )

  Temperature monitoring is not always considered to be reliable because the number of variables helps to generate heat. Ambient temperature, friction, speed changes,load and run time will be affected by temperature.

  Friction is the variable you should be most concerned if you are trying to predict failure, but how do you separate from all? increase if you can accurately calculate all ofthe variables, you will get a good indicator of temperature may be about to fail. Maybe the cheapest and easiest way to find a bearing failure is the use of non-contact infrared thermometer. It is important to note, as you must take into account other variables.

  Use these monitoring devices, we can effectively understand mechanical bearing failures before the sign, and accurately calculate the expected remaining life of mechanical bearing, thereby reducing unplanned downtime, to ensure normal production.


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