Insitute of Vibration and Noise, Naval University of Engineering, Wuhan, 430033, China.
State Key Laboratory of Ship Vibration and Noise, Wuhan, 430033, China.
Sci Rep. 2022 Jul 4;12(1):11297. doi: 10.1038/s41598-022-15452-8.
Compared with involute internal gear pumps and gerotor pumps, lower flow ripple is the main advantage of Truninger pumps. Understanding the flow ripple mechanism and characteristics is of great significance to guide the design and manufacture of this type of pump. In this paper, the theoretical flow ripple and flow ripple rate expressions of the pump are derived based on the vector ray method, and the effects of variations of the design parameters of the pump on the theoretical flow ripple characteristics are studied. A three-dimensional numerical simulation model was established in Simerics-MP+ that accounted for the fluid properties and cavitation. All the geometric features, including unloading grooves, the oil distribution areas, the shapes of the suction and delivery passageways, and the axial and radial leakage gaps, were considered to achieve the highest accuracy in the prediction of flow ripple. Finally, a flow ripple test platform was built based on the secondary source method. The validity and accuracy of the model were verified by test results. The flow ripple characteristics under different working conditions were compared and analyzed. The following conclusions were obtained: (1) The smaller module, the larger addendum coefficient and the half angle of the tooth profile in the design process, the lower the pump speed during operation is beneficial to reduce the vibration and noise of this pump; (2) Flow ripple is the comprehensive result of the oil characteristics, internal leakage, and geometric characteristics through the comparisons of theoretical, simulation and experimental results; (3) The flow ripple amplitude and the ripple rate increased with the increase in the outlet pressure and the influence of the pump speed variations on the flow ripple characteristics is less than that of outlet pressure variations. The conclusions obtained in this paper will help designers understand the flow ripple mechanism, achieve low-noise pump designs, and optimize Truninger pumps.
与渐开线内齿轮泵和摆线转子泵相比，流量脉动较小是特伦辛格泵的主要优势。了解流量脉动的机理和特性对指导这种泵的设计和制造具有重要意义。本文基于矢量光线法推导出了泵的理论流量脉动和流量脉动率表达式，并研究了泵设计参数变化对理论流量脉动特性的影响。在 Simerics-MP+ 中建立了一个考虑流体特性和空化的三维数值模拟模型。考虑了所有几何特征，包括卸载槽、配油区、吸油和排油通道的形状以及轴向和径向泄漏间隙，以实现对流量脉动的最高精度预测。最后，基于二次声源法建立了流量脉动测试平台。通过测试结果验证了模型的有效性和准确性。比较和分析了不同工作条件下的流量脉动特性。得出以下结论：（1）在设计过程中，较小的模数、较大的齿顶高系数和齿廓半角，以及较低的泵运转速度，有利于降低该泵的振动和噪声；（2）流量脉动是油特性、内部泄漏和几何特性的综合结果，通过理论、模拟和实验结果的比较可以得出这一结论；（3）流量脉动幅值和脉动率随出口压力的增加而增大，泵转速变化对流量脉动特性的影响小于出口压力变化的影响。本文得出的结论将有助于设计者了解流量脉动机理，实现低噪声泵的设计，并优化特伦辛格泵。
