A method and device for analyzing the working stability of a marine diesel engine
A marine diesel engine and analysis method technology, which is applied in the field of marine diesel engine work stability analysis, can solve problems such as poor accuracy, limited application range, and large calculation amount, and achieve the effect of clear directionality and simple and accurate calculation
Active Publication Date: 2018-04-20
CSSC SYST ENG RES INST
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[0004] In view of the above analysis, the present invention aims to provide a working stability analysis method of a marine diesel engine to solve the problem of poor accuracy of the three existing methods for judging the working state of a diesel engine by using the instantaneous speed, limited application range, large amount of calculation, and need to rely on Problems with experience or extensive experimentation
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[0036] Preferred embodiments of the present invention will be specifically described below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and are used together with the embodiments of the present invention to explain the principle of the present invention.
[0037] Firstly, the method described in the embodiment of the present invention will be described in detail with reference to the accompanying drawings.
[0038] Such as figure 1 as shown, figure 1 It is a schematic flow chart of the method described in the embodiment of the present invention, which mainly includes: intercepting the instantaneous rotational speed according to different working conditions, and obtaining multiple sets of instantaneous rotational speed waveform signals under different working conditions; using Fourier transform to perform spectrum analysis on the intercepted instantaneous rotational speed waveform signals Obtain the frequ...
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The invention relates to a marine diesel engine work stability analysis method and apparatus. The method comprises obtaining diesel engine instantaneous rotating speed signals through a marine diesel engine instantaneous rotating speed acquisition system and obtaining amplitude peak values of 0.5 order, 1-time frequency, 1.5-time frequency, 2-time frequency, 2.5-time frequency, 3-time frequency and a following frequency domain through performing spectrum analysis on the instantaneous rotating speed signals in a whole period. According to the invention, the unstable rate of a marine diesel engine under various work conditions is calculated according to multi-order frequency domain amplitude peak values of multiple groups of instantaneous rotating speeds, and the work unstable degree of the marine diesel engine and the appearance time are determined by use of the unstable rate.
Description
technical field [0001] The invention relates to the technical field of diesel engines, in particular to a method and device for analyzing the working stability of a marine diesel engine. Background technique [0002] Speed is an important parameter of marine diesel engine. The speed of marine diesel engine will be affected by the gas moment, inertia moment and load moment of diesel engine, which is a comprehensive reflection of the operation status of marine diesel engine. At present, the research of instantaneous speed has been greatly developed along with the research of engine transient performance analysis and non-contact measurement technology. During the working process of a multi-cylinder internal combustion engine, each cylinder performs work in sequence according to the firing sequence, and the instantaneous speed in the cycle fluctuates regularly, which contains rich information reflecting the internal working state of the internal combustion engine. The instant...
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IPC IPC(8): G01M15/04
CPCG01M15/046
Inventor 刘鹏鹏陈桂玲童一峻陈卓张成伟
Owner CSSC SYST ENG RES INST