【摘要】 为解决已有的液压变压器变压比模型与实际结果偏差较大的问题,通过对实际工作过程中不应忽略的摩擦与泄漏损失进行研究,引入机械摩擦损失系数、黏性摩擦损失系数和层流泄漏系数,建立了液压变压器变压比模型.计算分析和试验结果表明,负载流量对液压变压器的变压比特性影响巨大,液压变压器的变压比应表示为配流盘控制角和负载流量的函数.当控制角不变时,变压比随负载流量的增大单调减小;当负载流量不变时,变压比存在有限的最大值,这一最大值及其对应的最大有效控制角随负载流量的增大而减小.更多还原

【Abstract】 In order to improve the accuracy of the existing transformation ratio model of the hydraulic transformer,a mathematical model is established by introducing the friction coefficient,the viscous drag friction coefficient and the laminar leakage coefficient.As shown from calculation and experimental results,the transformation ratio is greatly influenced by the load flow rate and should be modeled as the function of both the control angle and the load flow rate.And at the constant control angle,transformation ratio decreases monotonously along with the load flow rate increasing.And at the constant load flow rate,transformation ratio has a finite maximal value at a certain control angle.This maximal value and its corresponding maximal effective control angle decrease with the load flow rate increasing.更多还原