Common Faults of Deep Groove Ball Bearings and Their Solutions
Release time:
2025-06-12
Common Faults of Deep Groove Ball Bearings and Their Solutions
Deep groove ball bearings are widely used in equipment such as motors, pumps, and household appliances due to their simple structure, low friction coefficient, and excellent high-speed performance. However, affected by factors such as working conditions, installation, and maintenance, bearings are prone to failure. The following will deeply analyze common failure phenomena, their causes, and provide targeted solutions.
1. Bearing overheating: Hidden dangers behind abnormal temperature rise
Fault manifestations
During operation, the bearing temperature exceeds the normal range (normal ≤ 80℃), the equipment surface is hot, the infrared thermometer shows a sudden increase in temperature, and in severe cases, there may even be smoke or carbonization of the lubricating grease. Reason analysis
Lubrication failure: Insufficient grease filling, incorrect grease type selection, aging and drying out of the grease, or mismatch in lubricating oil viscosity, all of which cause increased internal friction in the bearing and generate a large amount of heat. For example, using high-viscosity grease on high-speed rotating equipment will increase the resistance of the stirring, leading to a rise in temperature.
Installation too tight: Excessive interference fit between the shaft and the inner ring of the bearing, or between the bearing seat and the outer ring, compresses the internal clearance of the bearing, causing a sharp increase in pressure between the rolling elements and the raceways, resulting in frictional heat generation during operation.
Overload operation: Equipment operating beyond the rated load for a long time, or experiencing excessive instantaneous impact load that exceeds the bearing's carrying capacity, causing local overheating.
Heat dissipation obstruction: High environmental temperature, poor ventilation, or the bearing being encapsulated preventing heat from being dissipated, such as excessive sealing affecting heat dissipation. Solution
Optimize lubrication management: Select the appropriate lubricant based on operating conditions (rotation speed, temperature, load), such as using low-viscosity lubricating oil for high-speed and light-load conditions, and extreme-pressure lubricating grease for heavy-load conditions; Regularly inspect the lubrication status, replenish or replace deteriorated lubricating oil in a timely manner, and clean the lubrication channels.
Adjust installation accuracy: Re-measure the dimensions of the shaft and bearing housing to ensure the fit tolerance complies with standards and appropriately increase the clearance; Use specialized tools during installation to avoid being too tight or too loose.
Control load conditions: Verify the operating load of the equipment to avoid overloading; In cases with impact loads, install buffering devices, such as elastic couplings.
Improve heat dissipation conditions: Enhance ventilation and add heat sinks or fans; Check if the seals affect heat dissipation and optimize the seal design if necessary.
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