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发明公开
CN104246086A 挖掘机的液压混合动力回转驱动系统 有权

挖掘机的液压混合动力回转驱动系统
摘要：
提供的是一种挖掘机的回转驱动系统(11)，其利用了机械地连接至第一液压泵/马达(30)的原动机(20)、和机械地连接至回转机构(70)的第二液压泵/马达(32)。该系统包括连接液压流体储罐(42)、液压蓄能器(40)、第一液压泵/马达(30)、和第二液压泵/马达(32)的液压回路(31)。该系统能够在一种模式下操作，在该模式下，第二液压泵/马达作为泵动作以阻止回转机构的移动，且加压液压流体从第二液压泵/马达被泵送至液压蓄能器中。该系统能够在另一模式下操作，在该另一模式下，来自液压蓄能器的加压流体被用来辅助原动机驱动包括回转机构的多个液压用户(62、64、66)。
摘要（英）：

A swing drive system for an excavator is provided which utilizes a prime mover mechanically connected to a first hydraulic pump/motor and a second hydraulic pump/motor mechanically connected to a swing mechanism. The system includes a hydraulic circuit connecting a hydraulic fluid reservoir, a hydraulic accumulator, the first hydraulic pump/motor, and the second hydraulic pump/motor. The system is operable in one mode where the second hydraulic pump/motor acts as a pump to retard movement of the swing mechanism and pressurized hydraulic fluid from the second hydraulic pump/motor is pumped into the hydraulic accumulator. The system is operable in another mode where the pressurized fluid from the hydraulic accumulator is used to assist the prime mover in driving hydraulic consumers, including the swing drive.

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