往复压缩机变负荷工况阀片运动规律及气缸内状态仿真研究

Movement law of valve plate and simulation of cylinder state of reciprocating compressor under variable load condition

为了更好地了解往复式压缩机在不同工况下阀片的运动规律以及气缸内压力、温度的变化情况,对压缩机气缸及阀片运动规律进行了模拟仿真研究。采用有限元分析手段建立了往复压缩机的三维流场模型,在变负荷工况下,运用Fluent软件模拟分析了压缩机气阀与气缸工作状态;在正常工况下,模拟了压缩机气阀的运动情况和气缸内的压力变化情况,并利用往复压缩机实验台进行了实验验证;在气量调节工况和不同的阀片顶开位移的工况下,针对压缩机进行了模拟,得到了不同工况下阀片运动规律、气缸内示功图及气缸内温度变化规律。研究结果表明:针对机组复杂运行状态可用计算机仿真研究进行深入模拟,获得贴近实际运行状态的数据,对分析压缩机运行状态,改进优化气量调节系统具有重要作用。

In order to better understanding of the movement law of the valve and the change of pressure and temperature in the cylinder under different working conditions, the simulation of the cylinder and valve motion of the compressor was carried out. The three-dimensional flow field model of the reciprocating compressor was established by means of finite element analysis. The Fluent software was used to simulate and analyze the working state of the valve and cylinder under variable load conditions. The movement of the gas valve under normal working conditions and the pressure change in the cylinder were simulated, and the experimental verification research was carried out by using the reciprocating compressor test bench. The working conditions of the compressor in the gas volume regulation condition and the different valve plate top opening displacement were simulated. The law of valve movement, cylinder internal force diagram and cylinder internal temperature variation under different working conditions were obtained. The research results indicate that the computer simulation research can carry out in-depth simulation of the complex operating state of the unit, obtain the data close to the actual operating state, and play an important role in analyzing the operating state of the compressor and improving the optimized gas volume regulation system.