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液压系统经常需要蓄存液体能量,调节工作液体的变量,减缓压力冲击等等。但是,液体的压缩性比气体的小,因此,液体不能象气体那样用压缩的方法达到直接蓄能的目的。为了在液压回路中能够蓄存液体能量,常采用可压缩的氮气构成液压气动蓄能器,也可利用拉紧弹簧的能量或流体的势能蓄存液压能。按蓄能方式,蓄能器有以下几种结构形式:液压气动蓄能器(气体与工作液体之间带分隔板或不带分隔板)、弹簧蓄能器和重力蓄能器。
Hydraulic systems often need to store liquid energy, adjust the working fluid variables, reduce pressure shocks and more. However, the liquid is less compressible than the gas, so that the liquid can not be compressed directly to achieve the purpose of direct energy storage. In order to be able to store liquid energy in the hydraulic circuit, compressible nitrogen is often used to form a hydraulic pneumatic accumulator. Hydraulic energy can also be stored by utilizing the energy of the tension spring or the potential energy of the fluid. According to the energy storage method, the accumulator has the following types of structures: hydraulic pneumatic accumulators (with or without separating plates between gas and working fluid), spring accumulators and gravity accumulators.