首页> 外文期刊>Naval engineers journal >Creating Standard Diagnostic Characteristics For Misfiring Diagnostics Of Main Diesel Engine By Torsional Vibrations
【24h】

Creating Standard Diagnostic Characteristics For Misfiring Diagnostics Of Main Diesel Engine By Torsional Vibrations

机译:通过扭转振动创造出用于主柴油机诊断的标准诊断特征

获取原文
获取原文并翻译 | 示例
       

摘要

The paper presents a method for making the standard diagnostic characteristics (SDC) in the technical diagnostics of the marine diesel engines as the main engine (ME) of the main propulsion plant by the torsional vibration. The diagnostic regimes were grouped into the diagnostic state regimes (DSR) and the diagnostic revolution regimes (DRR), respectively. For the z-cylinder ME, the DSR group has R = (z+1) steady technical states. Each of these states presents whether all of the cylinders are working normally or any of the cylinders works misfires. The real firing always is random and we considered that the normal firings were random processes with three levels of the firing coefficient Cf (ⅰ) = {0.90,0.95,1.00}, and the misfiring: Cf (ⅰ) = {0.00,0.05, 0.10}, i=l...z. Therefore the number of the experiments of the random DSR was designed N_(DSR) = 3~Z. The DRR depends on the exactness of the revolution sensor. At the average revolution n_(avr,) the DRR varies: DRR= [1-δ, 1+δ]*n_(avr)= [n_(DMIN), n_(DMAX)] where S is selected in accordance with the following requirements: (1) the inside of this DRR was not placed any resonance revolution of the torsional vibration with the first two freedom frequencies; (2) the designed DRR depends on the selected revolution sensor for diagnosing, the revolution n_(avr), measurement skills of the operator, and the working sea condition. The DRR interval [73 .. .80] (rpm) is designed on the base of analyzing the accuracy of the tachometer TM-4100 D (Tenmars Co.Ltd) and verifying for the ME 6S46 MC-C7 on the MV.34000 DWT. The total number of the diagnostic experiments is N_D= 7.8.3~6 = 40824.
机译:本文介绍了一种通过扭转振动将船用柴油发动机技术诊断中的标准诊断特性(SDC)进行标准诊断特性(SDC)。将诊断制度分别分组为诊断国家制度(DSR)和诊断革命制度(DRR)。对于Z-缸ME,DSR组具有R =(Z + 1)稳定的技术状态。这些状态中的每一个都呈现所有气缸正常工作,或者任何汽缸都工作失误。真正的射击总是随机,我们认为正常烧制是具有三个水平的烧制系数CF(Ⅰ)= {0.90,0.95,1.00}的随机过程,以及MISFIRING:CF(Ⅰ)= {0.00,0.05, 0.10},i = l ... z。因此,设计了随机DSR的实验的数量N_(DSR)= 3〜Z. DRR取决于旋转传感器的确切性。在平均旋转N_(AVR,)DRR变化:DRR = [1-Δ,1 +Δ] * n_(avr)= [n_(dmin),n_(dmax)],其中根据以下选择s要求:(1)该DRR的内部没有将扭转振动的任何共振旋转放在前两个自由度频率; (2)设计的DRR取决于所选择的革命传感器,用于诊断,革命N_(AVR),操作员的测量技巧以及工作海况。 DRR间隔[73 .. .80](RPM)是在分析转速表TM-4100 D(Tenmars Co.LTD)的准确性的基础上,并在MV.34000 DWT上验证ME 6S46 MC-C7 。诊断实验的总数是N_D = 7.8.3〜6 = 40824。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号