混合动力挖掘机机电耦合分析及解耦策略

Hybrid Excavator Electromechanical Coupling Analyzing and Decoupling Strategy

摘要: 液压挖掘机并联混合动力技术已经得到成功应用，并表现出良好的节能效果，尤其对于发动机燃油效率及寿命提升作用明显。然而其动力系统大都采用发动机、电动/发动机和液压泵同轴耦合方式，节省了装配空间，但亦存在强机电耦合，引起严重的轴系振动和噪声，影响主轴寿命和驾驶体验。本文分析了并联混合动力耦合机理及振动原因，提出了基于硬件减振和软件策略优化的解耦方法，以减少轴系振动，改善驾驶环境。

Abstract: Parallel hybrid excavator technology has been successfully developed and showed good energy saving effect. Especially, it plays an important role for the life extension of the engine and the im-provement of fuel efficiency. However, its power systems were composed by diesel engine, electric motor and pump coaxially. Although it can save installation space by this link style, it may cause a strong electromechanical coupling, and even severe shafting vibration and noise. Eventually, it may affect spindle life and driving experience. Based on the analysis of the parallel hybrid vibration coupling mechanism, a new strategy based on hardware and software optimization was put forwarded. The experiment results show that it could reduce shaft vibration and improve the driving condition.