在目前常规游梁式抽油机增加自适应平衡重装置,通过优化设计可使改造后减速器均方根净扭矩有所下降,一定程度改善抽油机平衡状况,对于传统抽油机在节能降耗等方面具有参考和借鉴意义.

The paper provides a brief introduction to the research and development of ME150+110/25-83A5 gantry crane,focusing on the overall scheme,composition,performance characteristics,key technologies,and innovations of such gantry crane.The gantry crane operating process fully shows the design concepts of safe structure,reliable performance,simple operation,and cost-effectiveness,which provides significant reference for large-tonnage large-span gantry cranes.

In line with the construction requirement of the high-speed railway in China,the paper designs a kind of new underslung mobile scaffolding pier-side bracket which is applicable for both low and high pier construction,introduces the composition,characteristics and applicability analysis of the pier-side brackets,and conducts the finite element analysis.The engineering practice proves that the pier-side bracket has light and ingenious structure and strong adaptability.