Disassembling method of wind turbine generator system main bearing with shaft sleeve

Abstract

The invention discloses a disassembling method of a wind turbine generator system main bearing with a shaft sleeve. The disassembling method is mainly used for disassembling the main bearing from a main shaft. The disassembling method comprises the following steps: A. cooling the main shaft; B. heating a bearing inner race of the main bearing, and C. dissembling the main bearing from the tail end of the main shaft using match of a bearing tensioner and the main bearing under the effect of external force. A certain temperature difference is formed between the main shaft and the bearing inner race of the main bearing by cooling the main shaft and heating the bearing inner race of the main bearing, magnitude of interference of assembling of the main shaft is offset using the expansion caused by heat and contraction caused by cold theory, and the main bearing can be disassembled from the main shaft safely and quickly using the bearing tensioner. Integrality of disassembling of the main bearing is guaranteed, damages to the main shaft by using the bearing tensioner to disassemble the main bearing directly can be avoided, and recycle of the main shaft saves large cost for an enterprise. The disassembling method of the wind turbine generator system main bearing with the shaft sleeve is simple in operation procedures at the same time, and an ideal disassembling method of the wind turbine generator system main bearing with the shaft sleeve is achieved.

Description

technical field [0001] The invention relates to a method for dismounting the main bearing of a wind power generating set with a sleeve, which is used for disassembling the main bearing from the main shaft. Background technique [0002] As the installed capacity of wind power continues to grow and the running time of wind turbines continues to increase, the main bearings of individual wind turbines have external signs of bearing failure such as excessive temperature rise and abnormal noise during operation. It is preliminarily determined that this In this case, the bearing can no longer meet the conditions for continued operation and needs to be disassembled. [0003] As for the cause of bearing failure, it may be caused by insufficient assembly accuracy of the fan drive chain, or it may be caused by the quality of the bearing itself. Therefore, when disassembling the bearing, it may be necessary to ensure the integrity of the bearing to facilitate the failure of the bearing....

AI Technical Summary

Problems solved by technology

On the other hand, the inner ring of the bearing and the main shaft are usually an interference fit. If the bearing is disassembled directly with a stretcher, the main shaft is likely to be strained due to the interference between the bearing and the main shaft and affect the use.

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