一种矿用低频衰减器设计与滤波特性研究  

Design and filtering characteristics of a low frequency attenuator for mining applications

作　　者：马小康 张富春[1,2] 杨延宁 MA Xiaokang;ZHANG Fuchun;YANG Yanning(School of Physics and Electronic Information,Yan’an University;Key Laboratory Jointly Built by Shaanxi Province and Cities of Intelligent Processing of Energy Big Data,Yan’an 716000,China)

机构地区：[1]延安大学物理与电子信息学院 [2]陕西省能源大数据智能处理省市共建重点实验室,陕西延安716000

出　　处：《延安大学学报（自然科学版）》2022年第3期66-69,75,共5页Journal of Yan'an University：Natural Science Edition

基　　金：陕西省能源大数据智能处理省市共建重点实验室研究基金项目(IPBED16)。

摘　　要：脉动冲击是影响煤矿液压系统稳定程度的重要因素,目前有关脉动冲击抑制的研究工作大都集中在中高频段,针对低频段脉动抑制研究较少。结合H衰减器的滤波特性,提出一种双套筒式脉动衰减器,用于低频滤波作业,利用电液比拟法建立等效电路图,通过数值仿真分析衰减器结构参数对滤波特性的影响规律。结果表明:内层套筒结构参数会影响脉动衰减器固有频率点位置及个数;该衰减器与传统衰减器相比较,低频段滤波性能佳,同时可对中低频段脉动冲击进行一定抑制;结合实际脉动工况,调整结构参数,实现有效滤波。Pulsation shock is an important factor affecting the stability degree of the coal mine hydraulic system.Most of the research work on pulsation shock suppression is focused on the middle and high frequency bands,with less research for the low frequency band.This paper combines the filtering characteristics of H attenuator,proposes a double-sleeve pulsation attenuator for low-frequency filtering operation,establishes the equivalent electrohydraulic diagram using the electrohydraulic comparison method,and analyzes the influence law of attenuator structure parameters on the filtering characteristics through numerical simulation.The results show that:the inner sleeve structure parameters affect the position and number of inherent frequency points of the pulsating attenuator;the attenuator has good filtering performance in the low frequency band compared with the conventional attenuator,and can suppress the pulsating shock in the middle and low frequency bands;combined with the actual pulsating conditions,the structural parameters can be adjusted to achieve effective filtering.

关 键 词：低频脉动 滤波特性 电液比拟法 数值仿真 

分 类 号：TH137.8[机械工程—机械制造及自动化]