DEVELOPMENT OF METHODS FOR EVALUATION OF TECHNICAL CONDITION OF ENGINES ACCORDING TO THE RESULTS OF INDICATION OF WORKING PROCESS ON MODES DIFFERENT FROM NOMINAL

I. Bilousov, A. Marchenko, М.Ie. Rybalchenko, V. Savchuk, H.Ya. Tuluchenko
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Abstract

Technical condition assessment of marine internal combustion engines by the parameters and nature of the workflow is a common practice in their operation. Taking and analysis of indicator diagrams is a mandatory procedure provided by the rules of technical operation for the main range of large and medium-sized marine engines. There is a whole arsenal of indication means for such evaluation: from classical mechanical systems to electronic means of periodic or continuous action. The rapid development of electronic control systems and changes in approaches to logistics operations in maritime transport have imposed a number of limitations, somewhat narrowing the possibilities of using these methods. Most of the vessels that form the basis of the world merchant fleet were built 10...15 years ago. Information about the results of the indication of the engines of such vessels during bench tests is presented in the form of raster images. This complicates the process of using them as the reference needed to compare them with the actual diagrams obtained in operation by means of electronic control systems, which have replaced mechanical indicators over the past few years. In addition, tendencies to reduce the speed of vessels complicate, and often make it impossible to indicate the engines in the specified operating modes. As a result, the efficiency of using indicator diagrams to assess the current technical condition is sharply reduced. In this regard, there is an objective need to compare different methods of obtaining and storing information about the results of indication and in a unified method of presenting this information, convenient for processing and analysis. In addition, there is a need to develop methods for obtaining reference diagrams for nonspecific modes on the basis of processing the results of acceptance and commissioning bench tests of a particular engine to assess its technical condition by the results of indication on the partial load modes. This study is devoted to the comparison of different methods of presenting information and obtaining reference indicator diagrams for non-specific operating modes of engines.
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根据非标称模态工作过程指示结果,制定发动机技术状态评定方法
根据工作流程的参数和性质对船用内燃机进行技术状态评估是内燃机运行中的一种常见做法。指示图的绘制和分析是大中型船用发动机主要机型技术操作规程规定的一项强制性程序。对于这样的评估,有一整套的指示手段:从经典的机械系统到周期性或连续作用的电子手段。电子控制系统的迅速发展和海上运输中物流作业方法的变化造成了一些限制,在某种程度上缩小了使用这些方法的可能性。构成世界商船队基础的大多数船只都是在2010年建造的。15年前。在台架试验期间,有关这类船舶发动机指示结果的信息以光栅图像的形式呈现。这就使使用这些数据作为参考,将它们与通过电子控制系统在运行中获得的实际图表进行比较的过程变得复杂。在过去几年中,电子控制系统已经取代了机械指标。此外,降低船舶速度的趋势使情况变得复杂,并且常常使在规定的工作模式下指示发动机变得不可能。因此,使用指示图来评估当前技术状况的效率大大降低。在这方面,客观上需要比较不同的获取和存储指示结果信息的方法,并以统一的方法呈现这些信息,便于处理和分析。此外,还需要在处理特定发动机的验收和调试台架试验结果的基础上,制定非特定模态参考图的方法,以根据部分负载模态指示的结果评估其技术状况。本研究致力于比较发动机非特定工作模式的不同信息呈现方法和获取参考指标图的方法。
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