【摘要】 为降低斜轴式柱塞马达在高低压切换过程中产生的液压冲击与噪声，以球面配流盘遮盖度为关键优化参数展开研究。基于CFD仿真，系统分析了遮盖度从-0.5°～4°(涵盖负遮盖、零遮盖与正遮盖)对压力和流量脉动及容积效率的影响规律。结果表明：负遮盖度增大会提高过渡过程的平顺性，但会显著降低马达配流容积效率；而正遮盖度增大会在提升配流容积效率的同时加剧柱塞腔压力脉动。通过细化分析2°～3°区间并结合噪声试验验证，确定了马达配流盘最优遮盖度为2.8°。在此遮盖度下，马达柱塞腔压力与流量脉动率显著降低，噪声测试值较优化前降低0.7 dB,实现了低噪声与高效率之间的良好平衡。更多还原

【Abstract】 This study investigates the overlap of the spherical port plate as a key parameter to reduce hydraulic shock and noise during high-to-low pressure transitions in a bent-axis piston motor. Using CFD simulations analyzes the effects of overlap from-0.5° to 4°(covering negative, zero, and positive overlap) on pressure pulsation, flow pulsation, and volumetric efficiency. The results show that increasing negative overlap improves transition smoothness, but significantly reduce the motor’s volumetric efficiency. Conversely, positive overlap enhances volumetric efficiency; however, it intensifies pressure pulsation in the piston chambers. A detailed analysis within the 2°～3° range, combined with noise testing, identifies 2.8° as the optimal overlap. At this setting, both pressure and flow pulsation rates are significantly reduced. Measured noise decreases by 0.7 dB compared to the initial design, achieving an effective balance between low noise and high efficiency.更多还原