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Simulation and performance analysis of control mechanism in variable displacement swash plate compressor

机译：变排量斜盘压缩机控制机构的仿真与性能分析

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摘要

The mathematical model of the control mechanism used in a variable displacement swash plate compressor (VDSC) is developed based on the force balance equation, mass and energy conservation equation. In order to verify the mathematical model, a test bench of control mechanism and test system of VDSC are established, and the simulated results agree well with the experimental data. With the mathematical model, the steady-state performance of control mechanism is simulated. The simulation results show that there is an inflection point (defined as the preset point) to divide the opening process of mass flow compensation control valve into a gradual opening stage and a quick opening stage. In the gradual opening stage, the swash plate case pressure goes down quickly and the mass flow rate rises along with the increase of suction pressure; in the quick opening stage, the swash plate case pressure goes up and the mass flow rate goes down along with the increase of suction pressure. The suction pressure at the preset point is linear inversely proportional to the discharge pressure.
机译：基于力平衡方程，质量和能量守恒方程，建立了可变排量斜盘压缩机（VDSC）中控制机构的数学模型。为了验证数学模型，建立了VDSC控制机构和测试系统的试验台，仿真结果与实验数据吻合良好。利用数学模型对控制机构的稳态性能进行了仿真。仿真结果表明，存在一个拐点（定义为预设点），将质量流量补偿控制阀的打开过程分为逐渐打开阶段和快速打开阶段。在逐渐打开阶段，斜盘箱压力迅速下降，质量流量随着吸气压力的增加而上升。在快速打开阶段，随着吸入压力的增加，斜盘箱压力升高，质量流量下降。预设点的吸气压力与排气压力成线性反比。

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