油液体积模量对液压机械全功率换段中目标段建压时间的影响

doi:10.3969/j.issn.1000-1093.2020.06.002

摘要/Abstract

摘要： 为了缩短液压机械全功率换段时间，基于全功率换段方法分析油液含气时的体积模量对目标段建压时间的影响。对油液正切体积模量进行理论分析和试验研究，获得油液正切体积模量的变化规律。以某两段等差式液压机械为研究对象，在全功率换段方法基础上，建立功率过渡阶段的目标段建压子过程模型。通过仿真分析与样机试验相结合的方法，得到考虑纯油液体积模量、油液含气时的正割体积模量和正切体积模量下的目标段建压时间。结果表明：当研究液压机械全功率换段的目标段建压时间时，必须考虑油液含气量对建压时间的影响，且应采用油液正切体积模量；油液含气量越大，油液正切体积模量越小，目标段建压时间越长。

关键词: 液压机械, 无级传动, 全功率换段, 油液正切体积模量, 油液含气量, 功率过渡, 建压时间

Abstract: In order to shorten the power shift time of hydro-mechanical transmission (HMT), the influence of bulk modulus for the oil containing gas on pressure building-up time of target range is explored based on the full power shift method. The oil tangent bulk modulus is theoretically analyzed and experimentally studied, and the change law of tangent bulk modulus of oil is obtained. A two-range arithmetic HMT is taken as the research object. The target range pressure building-up model in the power transition stage is established based on the full power shift method. The pressure building-up time of target range under the conditions of secant bulk modulus, tangent bulk modulus and pure oil bulk modulus was obtained by means of simulation analysis and protogype experiment. The results show that, when studying the pressure building-up time of target range in full power shift, the influence of oil gas content on the pressure building-up time must be considered, and the tangent bulk modulus should be used. The larger the oil gas content is, the smaller the tangent bulk modulus is, and the longer the pressure building-up time of target range is. Key

Key words: hydro-mechanical, variabletransmission, fullpowershift, oiltangentbulkmodulus, oilgascontent, powertransition, pressurebuilding-uptime

中图分类号:

TJ810.3⁺22

鲍永，钟再敏，杨树军，张璐. 油液体积模量对液压机械全功率换段中目标段建压时间的影响[J]. 兵工学报, 2020, 41(6): 1056-1066.

BAO Yong, ZHONG Zaimin, YANG Shujun, ZHANG Lu. Influence of Fluid Bulk Modulus on the Target Range Pressure Building-up Time of Hydro-mechanical Transmission in Full Power Shift[J]. Acta Armamentarii, 2020, 41(6): 1056-1066.

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第41卷第6期2020 年6月
兵工学报ACTA ARMAMENTARII
Vol.41No.6Jun.2020

[1]	杨树军，鲍永，张曼，张璐，张寅君，田霖. 液压机械全功率换段时机的非对称偏差特性[J]. 兵工学报, 2019, 40(9): 1770-1780.
[2]	1:华顺刚;2:刘修骥. 无级变速兼转向的车用液压机械综合传动系理谱规律研究[J]. 兵工学报, 1997, 18(1): 1-4.