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    lol竞猜平台app >> 装载机排气冷却技术分析
    装载机排气冷却技术分析
    发布时间:2015-5-3 18:04:53    浏览:201次

    发动机是装载机最主要的总成之一,是车辆行驶的动力来源。山东装载机在我国矿山、工程车辆中应用广泛。采用故障诊断技术对山东装载机发动机进行监测和诊断,可以及时发现故障,找出发动机运行中的故障隐患,有针对性地进行维修,提高发动机维修质量和效率,确保其处于最佳运行状态。
    Shandong loader engine is one of the main assembly, is the vehicle's power source. Shandong loader our mining, engineering vehicles widely used. The use of fault diagnosis technology in Shandong loader engine monitoring and diagnostics,you can discover problems, identify the engine running hidden faults and carry out repairs, to improve the quality and efficiency of engine maintenance, to ensure that it is in optimum operating condition.
     
    装载机发动机气缸盖的振动是多种激励源综合作用的结果,对缸盖振动信号的理解是利用缸盖振动进行诊断的基础。山东装载机工作循环具有一定的周期性,每个冲击激励的行为都有自己的开始和结束时刻,各行为在时间上表现出很强的分割性。因此对振动信号加以截取并进行时频域分析,能够提取零部件的工作状态的特征信息。
    Shandong loader engine cylinder head vibration is a result of the combined effects of multiple excitation source for understanding the cylinder head vibration signals using vibration diagnosis on the basis of the cylinder head. Shandong

    loader work cycle with a certain periodicity, and each has its own impact excitation behavior start and end time of each behavior over time show a strong Severability. Therefore, the vibration signal to intercept and frequency domain

    analysis, feature information can be extracted components work status.

    为了识别装载机燃烧始点,基于油压、缸压以及振动信号识别方法的优缺点,最后采用振动信号识别。在燃烧始点气缸压力急剧升高,缸盖振动响应也更为强烈。通过对信号进行一系列的Hilbert变换、形态滤波、差分运算、最后设置阈值即可提取燃烧始点。气门的开启和闭合会对缸盖形成极短时间内的冲击,引起气缸盖振动,响应波形为衰减振荡形式。
    In order to identify the starting point of combustion Shandong loaders, advantages and disadvantages of the hydraulic cylinder pressure, and vibration signal recognition, and finally the use of vibration signal recognition. A sharp rise in the combustion pressure cylinder starting point, head vibration response and more intense. Through a series of signals of Hilbert transform, morphological filtering, differential operation, and finally set the threshold value can be extracted start of combustion. The opening and closing of the valve head would impact the formation of a very short time, causes vibration of the cylinder head, in response to the ringing waveform form.