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发明公开
CN104988963A 一种液压挖掘机动臂势能回收系统 审中-实审

一种液压挖掘机动臂势能回收系统
摘要：
本发明提供了液压挖掘机动臂势能回收系统的技术方案，该方案还包括用于驱动动臂运动的两个主控油缸和一个辅助油缸，所述辅助油缸分别与两个主控油缸并联设置，所述两个主控油缸的缸杆和辅助油缸的缸杆同步运动，所述液压泵经第二换向阀与两个主控油缸的有杆腔、无杆腔以及辅助油缸的有杆腔连通，所述辅助油缸的无杆腔与蓄能器连通。使用本发明能将辅助油缸下降的势能回收在蓄能器中，蓄能器在动臂上升时释放储存的势能，整个液压系统较现有技术相比，大大降低了能耗，减小了发热，实现了能量的再次利用。
摘要（英）：

The invention provides the technical scheme of a hydraulic excavator movable arm potential energy recovery system. The scheme also comprises two main control oil cylinders and an auxiliary oil cylinder which are used for driving a movable arm to move, wherein the auxiliary oil cylinder is arranged in parallel with the two main control oil cylinders; cylinder rods of the two main control oil cylinders and a cylinder rod of the auxiliary oil cylinder synchronously move; a hydraulic pump is communicated with rod cavities and rodless cavities of the two main control oil cylinders and a rod cavity of the auxiliary oil cylinder by a second reversing valve; and a rodless cavity of the auxiliary oil cylinder is communicated with an energy accumulator. According to the invention, the potential energy produced when the auxiliary oil cylinder descends can be recovered in the energy accumulator; the energy accumulator releases the stored potential energy when the movable arm ascends; and compared with the prior art, the whole hydraulic system has the advantages that the energy consumption is greatly reduced; heating is reduced; and the reutilization of energy is realized.

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