1、 Reasons for excessive temperature of fan bearings

We know that excessive temperature of fan bearings is a major cause of unstable fan operation. During operation, the main reasons for excessive temperature of fan bearings are as follows.

Firstly, there is a design error in the concentricity of the fan bearing package, making it difficult to find a reference point during installation. Problems during the installation process can also lead to height differences in bearings or out of tolerance in the concentricity of two boring holes, making it difficult to eliminate design errors. Therefore, it is necessary to carefully inspect the equipment during the purchase process.

Secondly, the fan bearing tilted after long-term use, and maintenance personnel were unable to detect it in a timely manner. Long term tilting operation may lead to an increase in bearing temperature, wear, and vibration of the fan. Fan bearing box

Once again, the excessive pressure on the bearing lead caused by the design is also the reason for the high temperature of the bearing. There are no gaps reserved on the installation of both sides of the bearing, which prevents the running heat of the bearing from being discharged, leading to an increase in bearing temperature and even bearing burning. In addition, in production engineering, due to the small internal water chamber, the cooling strength is affected, resulting in a decrease in strength or blockage of the bearing water chamber, resulting in insufficient cooling water flow rate and high bearing temperature.

During the operation of wind turbine bearings, abnormal operation due to the unreasonable operation of other parts, or excessive use without following the operation, will lead to an increase in bearing temperature. Fatigue is the main cause of wear and temperature rise. During use, close attention should be paid to this issue. Although the task of nuclear power plants is heavy, blind production should not be ignored and the stable operation of equipment should not be neglected.

2、 Countermeasures for Excessive Temperature of Fan Bearings

The problem of excessive temperature of fan bearings can be broadly divided into two types: human factors and design factors. The specific handling measures are as follows.

In response to the issue of height difference in bearings, it is required to operate in a standardized manner and regularly inspect the equipment fan bearings of nuclear power plants, strictly following regulations for operation. On this basis, nuclear power plants should establish strict operating standards and ensure that they comply with the requirements of the construction site. In terms of design, it is necessary to improve China's fan design technology to ensure that it meets the requirements.

Strict inspection can also control the tilting of bearing operation. In addition, the bearing package has the problem of clamping the bearing lead too tightly. After its installation is completed, side mapping can be carried out on it. This process mainly ensures the clearance between the bearing and the bearing seat, as well as the clearance between the bearing and the bottom of the bearing. Only by ensuring sufficient and reasonable clearance can the temperature of the bearing not dissipate during operation and the temperature of the controller increase.

To address the issue of small water cavities inside bearings, it is necessary to carefully analyze the reasons. Design defects in the general casting process rarely occur, but they cannot be completely eliminated. Once they occur, they can only be scrapped and replaced. Most of the reasons are due to blockage in the bearing water chamber during operation, which needs to be detected in a timely manner and removed for flushing and maintenance.