Imported bearings are regularly checked for noise prevention methods

Core Tip: Regular inspection of the bearings is important to maintain the bearing in its best condition and can also reveal problems. Matters and related knowledge about the use of bearings in use
Regular inspections of the bearings are important to maintaining the bearing in its best condition and can also reveal problems. Matters and related knowledge about the use of bearings in use.
First of all, we want to emphasize that it is important to keep the imported bearings lubricated and clean. So before we inspect the bearing, we should clean the surface of the bearing and then remove the parts around the bearing. It should be noted that the oil seal is a very fragile part, so extra care should be taken during inspection and disassembly. Do not apply excessive force to avoid damage to the parts. Then carefully check the bearing's oil seal and its surrounding parts. If it has been shown to be a bad symptom, be sure to replace it. A bad oil seal will cause damage to the bearing, causing the bearing cloud to be abnormal and causing the machine to stop.
Second, we also check the lubricant of the bearing. Lubrication is very important, not only for imported bearings, but also for all bearings. However, please note that it is not advisable to add too much grease to the bearings.
The inspection method for bearing lubricants is:
Apply a little bit of lubricant to the two fingers. If there is any contaminant, feel it. Or apply a thin layer of lubricant on the back of the hand and check the seal.
Then it is to replace the lubricant of the bearing.
Imported bearings lubricated with oil should be refilled with fresh oil and allowed to rotate at low speed for a few minutes if the old oil is drained. As much as possible, allow the oil to collect the contaminants from the wreckage and then vent the oil. Note: It is best to filter the oil before use. For bearings that use grease-lubricated bearings, the replacement of the grease should be avoided with a cotton joint to any part of the bearing. Since these residual fibers may be wedged between the rolling elements and cause damage, especially the application of small bearings requires attention to this problem.
(1) Bearing raceway sound and its control method
The rolling sound is a kind of slippery continuous sound that the rolling element rolls on the rolling surface when the imported bearing is running, which is the unique basic sound that all rolling bearings will produce. The general bearing sound is the rolling sound plus other sounds. The ball bearing's raceway sound is irregular, the frequency is above 1000Hz, its main frequency does not change with the speed, but its total sound pressure level increases with the increase of the speed. For bearings with large rolling sounds, the sound pressure level of the raceway sound decreases with the increase of viscosity; while for bearings with small raceway sound, the sound pressure level decreases when the viscosity increases to about 20 mm2/s or more. For the increase. The greater the rigidity of the bearing housing, the lower the total sound pressure level of the raceway sound. If the radial clearance is too small, the total sound pressure level and main frequency of the raceway sound will increase sharply as the radial clearance decreases. The method of controlling the rolling sound is to select a low-noise imported bearing, that is, a bearing with a small waviness, and carefully select the conditions of use. The raceway sound often affects the noise of the entire machine, and reducing the raceway sound can reduce the noise of the entire machine.

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Solution to the effect of temperature on NSK self-aligning ball bearings

Core Tip: Temperature rise is likely to occur during the use of NSK self-aligning ball bearings. When the temperature of the NSK self-aligning ball bearing rises, first judge whether it is wrong or not. If it does rise, it should be done.
Temperature rise is likely to occur during the use of NSK self-aligning ball bearings. When the temperature of the NSK self-aligning ball bearing rises, first judge whether it is wrong or not. If it does rise, it should be treated as follows:
1. Check the cooling water pressure, water flow and piping system is normal. If the water pressure is low, the filter may be clogged and cannot be disposed of in time. It can be shut down and put into use when it is confirmed that it can work.
2. The oil pressure of the governor should be checked. If the oil pressure is low, the cooling water hydraulic valve may be closed.
3. Check the imported bearings for abnormal sound and check if the swing of the NSK self-aligning ball bearing is abnormal.
4. Take an oil sample to see if there is any change in the oil color and test it to see if it has deteriorated. If deterioration is confirmed, stop replacing the new oil.
5. Check if the oil level is normal. If it is not normal, check if the oil drain valve is closed. If it is closed, it should be replenished. If the gasket is oily, it should be stopped.
 Vibration damage to NSK self-aligning ball bearings can be said to be quite sensitive, and peeling, indentation, rust, cracks, wear, etc. will be reflected in the vibration measurement of NSK self-aligning ball bearings. Therefore, the magnitude of the vibration can be measured by using a special bearing vibration measuring device (frequency analyzer, etc.), and the specific situation of the abnormality cannot be inferred by the frequency division. The measured value differs depending on the conditions of use of the NSK self-aligning ball 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.
Let's take a look at the effect of temperature on imported bearings. The high temperature often indicates that the NSK self-aligning ball bearing is in an abnormal condition. High temperatures are also harmful to the lubricant of the bearing. Sometimes bearing overheating can be attributed to the lubricant of the bearing. If the NSK self-aligning ball bearing rotates for more than 125 °C for a long time, it will reduce the life of the NSK self-aligning ball bearing. Causes of high temperature bearings include: insufficient lubrication or excessive lubrication, lubricants. Contains impurities, excessive load, NSK self-aligning ball bearing damage ring, insufficient clearance, and high friction caused by oil seal.
Therefore, it is necessary to continuously monitor the temperature of the NSK self-aligning ball bearing, 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 NSK self-aligning ball bearing can be performed by means of a thermometer, such as a digital thermometer, which can accurately measure the temperature of the NSK self-aligning ball bearing and display it in °C or Fahrenheit. The importance of the bearing means that when it is damaged, it will cause the equipment to stop. Therefore, it is better to install a temperature detector for such NSK self-aligning ball bearings.

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