挖掘机作为一种主要的挖掘、装载工程机械 ,其回转系统性能作为整机的重要性能参数 ,对整机性能有着巨大的影响 ,如挖掘机作业的生产率和操纵的舒适性等 ,均受其制约。因而提高挖掘机的整机使用性能 ,则必须提高其回转系统的性能。在挖掘机回转系统中 ,除其回转速度指标参数外 Excavator as a major digging, loading construction machinery, the performance of the rotary system as an important performance parameters of the whole machine has a huge impact on the performance of the whole machine, such as excavator operation productivity and comfort of operation, are subject to Restrictions. Thus improving the overall performance of the excavator, you must improve the performance of its rotary system. Excavator rotary system, in addition to its rotational speed index parameters