CAJ | 학술논문

为了提高换向阀开启过程的换向性能，以降低该过程的液动力为目标，提出液压挖掘机虚拟载荷下开启过程的阀芯结构形态设计方法：以液压挖掘机整机动态性能试验数据为基础，将其作业的周期性、随机性载荷特征抽象为具有统计特性的虚拟载荷；再以虚拟载荷为边界条件，以降低开启过程阀芯所受液动力为评价标准，分析不同阀芯结构形态的流固耦合动力学响应，探讨换向阀阀芯结构优化设计方法。结果表明，合理等效阀口面积的U型槽结构可有效降低不同虚拟载荷下的阀芯液动力。
위료제고환향벌개계과정적환향성능，이강저해과정적액동력위목표，제출액압알굴궤허의재하하개계과정적벌심결구형태설계방법：이액압알굴궤정궤동태성능시험수거위기출，장기작업적주기성、수궤성재하특정추상위구유통계특성적허의재하；재이허의재하위변계조건，이강저개계과정벌심소수액동력위평개표준，분석불동벌심결구형태적류고우합동역학향응，탐토환향벌벌심결구우화설계방법。결과표명，합리등효벌구면적적U형조결구가유효강저불동허의재하하적벌심액동력。
To improve the muti-valve' s commutation ability and to reduce the valve' s flow forces during its opening,the valve structure of a hydraulic excavator under virtual loads was designed. First,the excavator virtual load model was established based on the excavator dynamic test data, and the statistics were used to express the load's periodic and random characteristics.Then,a 3D valve model with the boundary conditions of virtual load was proposed to solve the flow forces during the valve' s opening using the fluid structure interaction method.Finally,the flow force response characteristics of different valve spool structures were presented by the model.The results show that the spool with U-groove of moderate equivalent valve orifice area can effectively reduce the flow force under a series of virtual loads.