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On-line monitoring and diagnosis method for common faults of combustion chamber components of marine medium-speed diesel engine

A diagnostic method and technology for diesel engines, applied in the direction of internal combustion engine testing, etc., can solve the problems of inability to diagnose and deal with diesel engine faults in time, too few sensor types and numbers, and difficulty in implementing monitoring and diagnosis systems, and achieve a wide range of use space and applicable frequency bands. Wide, damage-reducing effect

Active Publication Date: 2020-11-24
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] For now, in the prior art, a single sensor is usually used to diagnose a specific fault of the diesel engine. Due to the limitation of the type and number of sensors, it is not possible to conduct more comprehensive monitoring and diagnosis of various faults of different parts of the diesel engine. , this will lead to two problems: first, when the types and quantities of sensors are arranged too few, it is impossible to diagnose and deal with diesel engine failures in time;

Method used

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  • On-line monitoring and diagnosis method for common faults of combustion chamber components of marine medium-speed diesel engine
  • On-line monitoring and diagnosis method for common faults of combustion chamber components of marine medium-speed diesel engine
  • On-line monitoring and diagnosis method for common faults of combustion chamber components of marine medium-speed diesel engine

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Embodiment

[0062] Taking the Zichai Z6170 marine diesel engine as an example, the online monitoring and diagnosis method for the common faults of the combustion chamber components will be introduced, and the present invention will be further explained.

[0063] Such as figure 1 As shown, the on-line monitoring and diagnosis method for common faults of marine medium-speed diesel engine combustion chamber components provided in this embodiment uses the fault simulation test data of diesel engine combustion chamber components, extracts characteristic parameters representing different faults and fault degrees, and conducts a method based on The monitoring and diagnosis of multiple faults in combustion chamber components of acoustic emission signal characteristic parameters includes the following steps:

[0064] 1) Install two acoustic emission sensors on the cylinder head of the diesel engine and the outer side of the body on the main knocking side where the energy attenuation is small and t...

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Abstract

The invention discloses an online monitoring and diagnosing method for common faults of marine medium-speed diesel engine combustion chamber parts. Acoustic emission sensors are arranged on an enginecylinder cover and the outer side of an engine body correspondingly, feature parameters representing the different faults are extracted from fault mechanisms, and the common faults of the marine medium-speed diesel engine combustion chamber parts are monitored and diagnosed on line. The different faults of the diesel engine combustion chamber parts can be monitored and diagnosed only through the two acoustic emission sensors, the types of sensors are less, the number of the sensors is small, monitoring is comprehensive and efficient, and the method is easy to implement and has wide applicationprospects.

Description

technical field [0001] The invention belongs to the technical field of diesel engines, and in particular relates to an online monitoring and diagnosis method for common faults of combustion chamber components of marine medium-speed diesel engines. Background technique [0002] Diesel engine is an important source of power on ships. Failure of diesel engine will seriously affect the navigation and safety of the ship. Timely detection of diesel engine failure and corresponding diagnosis can improve the safety and efficiency of ship navigation, and can also save a lot of time and cost. efficiency of diesel engines. [0003] For now, in the prior art, a single sensor is usually used to diagnose a specific fault of the diesel engine. Due to the limitation of the type and number of sensors, it is not possible to conduct more comprehensive monitoring and diagnosis of various faults of different parts of the diesel engine. , this will lead to two problems: first, when the types and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M15/12
CPCG01M15/12
Inventor 余永华谢文琪杨建国
Owner WUHAN UNIV OF TECH
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