First, large metal noise
Reason 1: Abnormal load, countermeasure: Correct the fit, study bearing clearance, adjust and load, and correct the position of the housing shoulder.
Cause 2: Poor installation, countermeasures: Machining accuracy of shaft and outer casing, improvement of mounting accuracy, and installation method.
Cause 3: The lubricant is insufficient or unsuitable. Countermeasure: Replenish the lubricant and select the appropriate lubricant.
Cause 4: The rotating parts are in contact. Countermeasure: Modify the contact part of the curved path seal.
Second, the rule noise
Cause 1: Indentation, rust, or scratch on the rolling surface due to foreign matter. Countermeasures: Replace the bearing, clean the parts, improve the sealing device, and use a clean lubricant.
Cause 2: (after steel carburization) surface deformation, countermeasures: replace the bearing, pay attention to its use.
Cause 3: The raceway surface is peeled off. Countermeasure: Replace the bearing.
Third, irregular noise
Reason 1: The clearance is too large. Countermeasure: Study the fit and bearing clearance, and modify the preload.
Reason 2: Intrusion of foreign matter, countermeasures: Study replacement of bearings, cleaning related parts, improving sealing devices, and using clean lubricants.
Cause 3: Spherical injury, peeling, countermeasure: Replace the bearing.
Fourth, abnormal temperature rise
Reason 1: Excessive lubricant, countermeasures: Reduce the lubricant, use it in moderation, and choose a harder grease.
Cause 2: The lubricant is insufficient or unsuitable. Countermeasure: Replenish the lubricant and select the appropriate lubricant.
Reason 3: Abnormal load, countermeasure: Modify the fit, study the clearance of the bearing, adjust the preload, and modify the position of the shoulder of the outer casing.
Cause 4: Poor installation, countermeasures: Improve machining accuracy, mounting accuracy, and mounting method for the shaft and housing.
Reason 5: Creep of the mating surface and excessive friction of the sealing device. Countermeasures: Replace the bearing, study the fit, modify the shaft and the outer casing, and change the sealing form.
5. Lubricant leaks too much and discolors
Cause: Too much lubricant, foreign matter intrusion, abrasion of powder, foreign matter, etc. Countermeasures: Use a proper amount of lubricant, study and change the lubricant, study the replacement of the bearing, and clean the outer casing.
Extend the life cycle method of imported bearings:
1. Whether the installation of imported bearings is correct, affecting accuracy, life and performance.
Therefore, the design and assembly department should fully study the installation of the bearing. I hope to install according to the operating standards. The items of the job standard are usually as follows:
(1) cleaning the bearing and bearing related components;
(2) Check the size and finishing of the connected parts;
(3) installation;
(4) Inspection after installation of the bearing;
(5) Supply lubricant.
2, alignment, straightening
After the bearings have been installed, alignment may result in additional loads, friction and vibration of the bearings if not carefully aligned. These can accelerate fatigue and reduce bearing life and can damage the life of other machine parts. In addition, increased vibration and friction can greatly increase energy consumption and risk of premature failure.
3. Basic condition monitoring
During use, the basic external conditions of the bearing operation are often monitored, such as temperature, vibration and noise measurements. These regular inspections will identify potential problems early and will prevent unexpected machine stops, enabling production plans, increased plant productivity and efficiency.
4, relubrication
In operation, the imported bearings require proper relubrication to perfect its performance. The method of bearing lubrication is divided into grease lubrication and oil lubrication. In order to make the bearing function well, first, choose a lubrication method that suits the conditions of use and the purpose of use. Lubricity of oil lubrication predominates if only lubrication is considered. However, grease lubrication has the advantage of simplifying the structure around the bearing.
5, remove
When the imported bearing will reach its end of life, it should be replaced. Although the bearing can no longer be used, correctly removing the original bearing and replacing the new bearing in time can promote the service life of the new bearing. First, the use of a suitable removal tool will help prevent damage to other machine components. Second, improperly removed technology can be hazardous to the operator.
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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