摘要
国网宝泉抽水蓄能有限公司300 MW发电机组大修后启动过程中推力轴承挡油板螺栓全部损坏。通过研究断裂现场情况并对螺栓材质、硬度、金相组织和断口进行分析,得出,挡油板螺栓连接丝扣数量不足,螺杆外露长度大于设计要求,造成承载能力显著下降,导致运行期间发生损坏。
The paper analyzed the fracture site and material of bolts,hardness,metallographic structure and fracture,point out the following conclusions： the quantity of oil baffle plate bolt fastening screw thread not sufficient,the length of exposed screw is greater than the design requirements,this condition will result significant decline in carrying capacity,and lead to damage during operation.
出处
《能源与节能》
2011年第9期57-59,共3页
Energy and Energy Conservation
