【摘要】 数字进液阀是实现数字式流量调控技术的重要硬件基础，针对数字进液阀设计需求，进行了乳化液泵进液阀稳态液动力分析和计算。首先阐述了数字式流量调控技术原理，确定了数字进液阀执行机构的可行工作区间；其次分析了进液阀阀芯受力，计算了阀芯在可行工作区间内所受稳态液动力；最后通过仿真得到了泵腔内部流场可视化分析结果，求得了液动力仿真值并与理论值进行了对比验证。结果表明：曲轴转角θ处于[60°,240°]区间内，进液阀阀芯需保持常开来实现数字流量调控目标；利用动量定理和可视化分析仿真，计算得到了可行区间内阀芯液动力，在θ为80°时稳态液动力达到了最大理论值6.68 N,仿真值6.19 N;可行区间内理论与仿真间最大误差为0.57 N,为后续乳化液泵数字进液阀设计提供了理论基础。更多还原

【Abstract】 The digital inlet valve serves as a critical hardware foundation for implementing digital flow control technology. Targeting the design requirements of digital inlet valve, a steady-state flow force analysis and calculation are conducted for the inlet valve of emulsion pumps. Firstly, the operational principles of digital flow control technology are expounded, and the feasible operating range of the actuator for the digital inlet valve is determined. Secondly, hydrodynamic forces acting on the inlet valve spool are rigorously analyzed, with the steady-state flow force acting on the spool within the feasible operating range is calculated. Finally, the visualization analysis results of the internal flow field in the pump chamber are obtained through CFD simulation. The simulated flow force values are calculated and comparatively validated against theoretical predictions. Depending on the scheme, maintaining the inlet valve spool in normally open position at crank angles θ ∈[60°,240°] is essential for goal of digital flow control technology. Feasible operating range flow force are computed via momentum theorem-based CFD simulations. Peak steady-state flow force occurred at θ=80°, with theoretical and simulated values of 6.68 N and 6.19 N respectively. The maximum deviation between theoretical and simulated results across the entire feasible operating range is 0.57 N, which provides a fundamental basis for determining design parameters of digital inlet valve in subsequent studies.更多还原