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diesel
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  柴油机
    Research on Marine Diesel Engine Fault Diagnosis Method Based on Information Fusion Technology and Application
    基于信息融合技术船舶柴油机故障诊断方法的研究与应用
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    A Study of Fuzzy Parameter Method Used for Low Speed Marine Diesel Engine Fault Diagnosis
    参数模糊法在船舶低速柴油机故障诊断中的应用研究
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    Study on Intelligent Monitoring and Intelligent Diagnosis of Marine Diesel Engine
    船舶柴油机智能监测与智能诊断的研究
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    Pneumatic Remote Control System for Marine Diesel Engines
    船舶柴油机主机的气动遥控系统
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    The Ship Hull Steady Vibration Resulted by Diesel Engine and Propeller
    柴油机及螺旋桨引起的船体稳态振动
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  “diesel”译为未确定词的双语例句
    Performance Analysis and Calculation of a Diesel Powered Ship Navigating at Limited Speed
    船舶限速航行的性能分析与计算
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    Experimental Study on the Combined Computer Control System of Diesel and Propulsion of Sail-Assisted Ships
    风帆船机桨联合计算机控制系统试验研究
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    Remote Control System CWJK 23 for Marine Diesel Engine
    新颖船用CWJK23型遥控系统
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    Fracture analysis of crank shaft of a vessel diesel
    某轮主机曲轴的断裂失效分析
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    This article introduces the analysis method and the conclusions on the surge reason of the turbo-charger of the diesel enginein some tracing ship
    文章介绍了对某测量船主机增压器喘振原因的分析方法和分析结论。
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  diesel
Design and characteristics of electric supercharger for diesel engine acceleration by additional rapid air injection
      
Research results indicate that the electric supercharger can respond rapidly with the great flux, and it is independent of the operating conditions of a diesel engine.
      
De-noising of diesel vibration signal using wavelet packet and singular value decomposition
      
The vibration signals of diesel include excess noise that must be eliminated before extraction of characteristic parameters.
      
The SNR (signal-to-noise ratio) of the vibration signals of a diesel cylinder lid is the highest.
      
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When using single-cylinder engine supercharged by external mechanically driven compressor to imitate the performance of a multi-cylinder diesel engine with blowdown turbo-supercharger, we usually install a back pressure adjusting device with a fixed-exit flow area instead of exhaust turbine. For the purpose of establishing the performance of the single-eylinder engine as closely as possible to that of the multi-cylinder engine, the exit flow area of the back pressure adjusting device must be determined...

When using single-cylinder engine supercharged by external mechanically driven compressor to imitate the performance of a multi-cylinder diesel engine with blowdown turbo-supercharger, we usually install a back pressure adjusting device with a fixed-exit flow area instead of exhaust turbine. For the purpose of establishing the performance of the single-eylinder engine as closely as possible to that of the multi-cylinder engine, the exit flow area of the back pressure adjusting device must be determined rationally. In this paper, proceeding from the difference between working conditions of the steady flow turbine and the blowdown turbine with the assumption of quasi-steady flow, separate flow coefficient A is firstly introduced. A method for calculating the exit flow area of the back pressure adjusting device is then derived from the continuity equation, energy equation of the turbine, the relation of the velocity triangle at the entry of the turbine and the definition of the degree of the reaction. In this paper, the author presents the test results from the multi-cylinder engine, from the test rig of the exhaust turbocharger as well as from the single-cylinder engine. A comparison of these tests results shows that the suggested analytical method is acceptable. From these test results, it is also possible to ascertain how accurate the performance of a multi-cylinder engine can be imitated on a singlecylinder engine by the above mentioned method. The paper also describes the single-cylinder imitative installtion and gives some experiences during testing.

当采用外源增压的方法,在单缸机上进行模拟具有变压增压系統的多缸发动机的工现的試驗时,一般常用一个固定出口截面积的背压調节器来代替变压增压系统中的軸流式廢气渦輪机,为了建立起单缸机与多缸机尽可能接近的工况,背压調节器的出口截面积应合理地选取。本文首先从比較等压条件下工作的渦輪机与在变压条件下工作,噴嘴环分组进气的反作用式渦輪机的工作条件的不同点出发,引用分流系数A的概念,并假定渦輪机內的流动是准稳定的流动。然后由連續方程式、工作輪能量方程式、工作輪进口速度三角形关系式以及渦輪机的反动度定义,推导了計算背压調节器出口截面积的方法,并給出对一台高速四冲程V-12缸廢气渦輪增压柴油机的計算例子。其次作者給出在多缸机上,增压器試验平台上以及在单缸机上的試驗結果,作了比較,表明上述分析是可取的。并从試验結果中也可以明确,按上述方法在单缸机上模拟多缸机的工况能达到滿意的程度。在文中也介紹了进行单缸模拟增压試驗的装置和經驗。

Due to the absence of common understanding among the naval architects,engine-builders and marine engineers,about the definition of marine diesel engine power rating,difficulties aroused by power deficiency in diesel-installations on board were frequently eneountered in service.This paper deals with diesel engine power rating from manufacturing and service point of view.The manufacturers should rate their engines into three ranks:maximum rating,nominal rating and over-nominal rating. The marine...

Due to the absence of common understanding among the naval architects,engine-builders and marine engineers,about the definition of marine diesel engine power rating,difficulties aroused by power deficiency in diesel-installations on board were frequently eneountered in service.This paper deals with diesel engine power rating from manufacturing and service point of view.The manufacturers should rate their engines into three ranks:maximum rating,nominal rating and over-nominal rating. The marine engineers should rate their auxiliary engines into two ranks,namely,normal service rating and overload rating,and their main propulsion engines into trial trip rating,maximum service rating and normal service rating.Scientific definifion of these ratings are explained and their empirical relati- ons are also given. The bases of nominal rating are standard ambiant atmospheric conditions and installation condi- tions.The author proposes that standard ambiant atmospheric conditions should be based on the mean conditions in the test shop of the most diesel engine factories throughout the country.However,the naval architects should rate their engines according to the particular conditions of the appointed navigation zone and the kind of service to be attained.Numerical data of ambiant atmospheric conditions and installation conditions proposed are:736mmHg.,20℃,70% humidity,and less than 150 mm WG vacuum in the intake air system,30~300mmHg back pressure in the exbaust system.The calculation method in practice for correcting nominal rating and specific fuel consumption according to the variations of ambiant atmospheric conditions differ largely one another.For non-supercharged diesel engines,new correction formulas according to constant fuel pump rack and constant fuel/air ratio respectively are recommended in the paper.The results of comparison of these proposed fornmlas with others in practice and also with published test data show that the recommended formulas are more reasonable,although the correction is still slighly too high. The ambiant conditions on board differ largely with those in test shop,so the determination of service rating depends upon the specification of ambiant atmospheric conditions in the machinery compartment.Three kinds of standard ambiant conditions in machinery compartment,for high sea,east- south sea and north sea-going ships respectively,are given in this paper.These numerical data are deter- mined by statistical method.In the determination of service rating,the influence of wear,rpm.,insta- bility and power reserve must be considered.Its empirical coefficients are introduced.Generally,the normal service rating for auxiliary engines is about 75~82% of the nominal rating from manufacturer and 70~99% for the main propulsion engines.

船用柴油机功率的定义在设计、制造和使用各方面缺少统一的理解,以致使用时常常出现柴油机功率满足不了需要的问题。本文提出船用柴油机功率分级应从制造及使用两方面分别加以考虑:从制造方面可分为最大功率、额定功率和超额功率三级;从船上使用方面,驱动发电机的付柴油机可分为持久功率及超额功率两级,而推进用的柴油机则应分为试航功率、最大使用功率和正常使用功率三级。本文给出了上述各种功率的科学定义和经验比例。额定功率的标定基础是标准大气条件和安裝条件,标准大气条件的选择原则应根据国内大部份柴油机车间的条件而定,而使用者別应根据具体航区和船的用途重新标定持久使用功率。本文建议的标准大气条件为736毫米汞柱,20℃和70%湿度,并提出进气系统真空度不超过150毫米水柱、排气背压应为30~100毫米汞柱。目前使用的各种额定功率及耗油率修正计算方法差别较大,本文对非增压柴油机分别按每循环供油量不变及燃烧空气过量系数不变两种情况提出了新的修正计算公式。运用本文介绍的公式计算结果与试验结果,比较表明本文建议的公式比较合理,但仍略偏于保守。船上机仓内的大气条件与工厂条件相差较大,投使用功率的选定应以机仓大气条件为准。作者根据统计提出适合在远...

船用柴油机功率的定义在设计、制造和使用各方面缺少统一的理解,以致使用时常常出现柴油机功率满足不了需要的问题。本文提出船用柴油机功率分级应从制造及使用两方面分别加以考虑:从制造方面可分为最大功率、额定功率和超额功率三级;从船上使用方面,驱动发电机的付柴油机可分为持久功率及超额功率两级,而推进用的柴油机则应分为试航功率、最大使用功率和正常使用功率三级。本文给出了上述各种功率的科学定义和经验比例。额定功率的标定基础是标准大气条件和安裝条件,标准大气条件的选择原则应根据国内大部份柴油机车间的条件而定,而使用者別应根据具体航区和船的用途重新标定持久使用功率。本文建议的标准大气条件为736毫米汞柱,20℃和70%湿度,并提出进气系统真空度不超过150毫米水柱、排气背压应为30~100毫米汞柱。目前使用的各种额定功率及耗油率修正计算方法差别较大,本文对非增压柴油机分别按每循环供油量不变及燃烧空气过量系数不变两种情况提出了新的修正计算公式。运用本文介绍的公式计算结果与试验结果,比较表明本文建议的公式比较合理,但仍略偏于保守。船上机仓内的大气条件与工厂条件相差较大,投使用功率的选定应以机仓大气条件为准。作者根据统计提出适合在远洋、东南海及比海航行的三种船舶之标准机仓大气条件;同时推荐了在送定使用功率计算中为考虑磨损、转速不稳性及功率贮备等因素所采用的系数。对于发电用的柴油机船上使用功率一般为额定功率的76~82%,对于推进主机则为70~79%。近年来,在我国船舶上,通常发现由于各方面对船用柴油机功率标定缺少统一妁理解,往往引起柴油机的实际使用功率超出其能力,以致引起柴油机超负荷、螺旋桨转速或发电量达不到设计要求,严重的甚至会引起发动机损坏。柴油机功率按不同大气条件的修正亦常常引起制造厂与验收部门的争执。这些问题虽然在我国有关标准中已作了某些规定,但仍有继续探讨的必要。本文着重对额定功率与使用功率的关系、标准大气条件的确定以及功率和耗油率按大气条件变化的修正等问题提出一些看法。

This paper aims at deriving a simple and reliable method for the determination of cyclic variation of exhaust gas pressure and temperature before turbine of an impulse-charged diesel engine, in order to facilitate the design of exhaust gas turbine. A succinct explanation on the process of the formation of exhaust impulse in exhaust pipe of a diesel engine with pulse system is made. In consideration of the characteristics of a two-stroke engine and also following the analysis of experimental data,...

This paper aims at deriving a simple and reliable method for the determination of cyclic variation of exhaust gas pressure and temperature before turbine of an impulse-charged diesel engine, in order to facilitate the design of exhaust gas turbine. A succinct explanation on the process of the formation of exhaust impulse in exhaust pipe of a diesel engine with pulse system is made. In consideration of the characteristics of a two-stroke engine and also following the analysis of experimental data, it has been found that in large and medium sized two-stroke diesel engines the exhaust pipe is all over under the same instantaneous pressure during most of the scavenging period, and is only a function of the time, thus the phenomenon can be regarded as the process of filling and evacuating the chamber of the exhaust pipe. It has also been found that the temperature is not only a function of the pressure but also to a agreat extent influenced by the displacement of the gas layers in pipe. In case of a pipework branches, there exist two gas zones with different temperatures. Study has also been made to the influence of the propagation of gas state variations on gas state at the beginning period of the formation of exhaust impulse. Basing on the above considerations, by a series derivation from the basic equation of Glagolev and the equations for the determination of the state variation of mixed gases in a container, the required formulas have been obtained. The particular items of the formulas can be regarded as particular functions, for which tables and graphs are provided for use. By using the step-by-step integration, it is easy to determine the variation of the exhaust gas pressure and temperature before the turbine, and the same can be used as basis to design the exhaust gas turbine of an impulse-charged engine. The calculation can also be made speedily by an electronic computer. In this paper, tentative calculation has been made on 3EDZ 43/67 type engine, with a result showing that there is only a small deviation between the figures of calculation and those of the actual measurement. It is expected that this method of calculation of exhaust-impulse in pressurecharged two-stroke diesel engines will provide practical value in engineering.

本文的目的是在发动机的設計阶段,给出一种簡便可靠的方法,計算出廢气渦輪前周期变化的气体压力和温度,以作为脉冲廢气渦輪設計工况选择的依据。文中对柴油机脉冲增压系排气管中排气脉冲的形成过程作了簡单明确的說明。从二冲程柴油机的特点出发,在分析了实驗資料后,认为在二冲程大、中型柴油机上;在大部分的时間段内,排气管中各处的压力在同一时刻是相同的,和它只是时間的函数。这样,現象可視为充填和排空排气管容积的过程。同时又认識到温度不仅是压力的函数,而且很大程度上决定于气流层的位移,在排气管有分枝的場合下,排气管中分成了两个不同的温度区。在計算方法中也考虑了在排气脉冲形成的开始阶段排气系统中气体状态变化的傳播对气体状态的影响。基于这些认识,由格拉高列夫基本方程式和确定混合气体状态的方程式,經过一系列具体的处理和推演,得到了計算公式。公式中的一些特定項被归納为特定函数,并预先作成通用的图表。由公式用逐段积分法列表计算可以很方便地求出廢气渦輪前排气管中气体的压力变化和温度变化,可以作为脉冲廢气渦輪設計的依据。文中并对3EDZ43/67柴油机进行了计算,計算結果与实驗結果的比较表明误差很小,本計算方法在工程上是有实际参考价值的。

 
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