Process characteristics for judging the vibration of imported bearings and the temperature of imported bearings
Core Tips: 1. Vibration of imported bearings The vibration of imported bearings is very sensitive to the damage of imported bearings. For example, peeling, indentation, rust, cracks, wear, etc. will all be reflected in the vibration measurement of imported bearings.
First, the vibration of imported bearings
The vibration of the imported bearing is very sensitive to the damage of the imported bearing. For example, peeling, indentation, rust, crack, wear, etc. will be reflected in the vibration measurement of the imported bearing. Therefore, by using a special bearing vibration measuring device (frequency analyzer, etc.) The magnitude of the vibration is measured, and the specific situation of the abnormality cannot be inferred by the frequency division. The measured values vary depending on the conditions of use of the bearing or the mounting position of the sensor. Therefore, it is necessary to analyze and compare the measured values of each machine in advance to determine the judgment standard.
Second, the temperature of the imported bearings
The temperature of the imported bearing is generally estimated by the temperature outside the bearing. If the oil hole can directly measure the temperature of the outer ring of the imported bearing, it is more suitable.
Usually, the temperature of the imported bearing rises slowly as the bearing starts to run, and reaches a steady state after 1-2 hours. The normal temperature of the imported bearings varies with the heat capacity, heat dissipation, speed and load of the machine. If the lubrication and installation parts are suitable, the temperature of the imported bearings will rise sharply, and abnormal high temperature will occur. At this time, it is necessary to stop the operation and take necessary precautions.
The thermal sensor can be used to monitor the working temperature of the imported bearing at any time, and automatically alarm or stop the occurrence of the burning shaft accident when the temperature exceeds the specified value.
The use of high temperatures often indicates that the bearing is in an abnormal condition. High temperatures are also detrimental to the lubricants of imported bearings. Sometimes bearing overheating can be attributed to the lubricant of the bearing. Long-term continuous rotation of the bearing at temperatures above 125 °C will reduce bearing life. Causes of high temperature imported bearings include: insufficient lubrication or excessive lubrication, lubricants. Containing impurities, excessive load, loss of imported bearings, insufficient clearance, and high friction caused by oil seals.
Therefore, it is necessary to continuously monitor the temperature of the imported bearings, whether it is measuring the bearing itself or other important parts. If the operating conditions are the same, any temperature change can indicate that a fault has occurred.
The periodic measurement of the temperature of the imported bearing can be carried out by means of a thermometer, such as a digital thermometer, which can accurately measure the temperature of the imported bearing and display it in °C or Fahrenheit.
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