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A method and device for on-line diagnosis of faults in a secondary suspension air spring system

A technology for air springs and system failures, applied in the direction of springs, measuring devices, springs/shock absorbers, etc., can solve problems such as waste of service life of air springs, and achieve the effect of overcoming low accuracy

Active Publication Date: 2018-06-08
GUANGXI UNIV
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Problems solved by technology

For the traditional visual inspection and empirical judgment, it is impossible to accurately and scientifically evaluate the service life of the air spring and force it to be scrapped in advance, resulting in a considerable amount of waste of the remaining service life of the air spring

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  • A method and device for on-line diagnosis of faults in a secondary suspension air spring system
  • A method and device for on-line diagnosis of faults in a secondary suspension air spring system
  • A method and device for on-line diagnosis of faults in a secondary suspension air spring system

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Embodiment Construction

[0026] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0027] Such as figure 1 As shown, an online diagnosis method for a secondary suspension air spring system failure according to a specific embodiment of the present invention includes the following steps:

[0028] Step S100: Collect deformation parameters of the air spring when the air spring is subjected to a load force. The deformation parameters include: spring height, effective bearing area and inner cavity volume, and establish a pressure-stiffness model of the air spring according to the deformation parameters;

[0029] In this step, when the air spring is subjected to a load force, the force analysis is performed on the air spring. At this time, the height of the spring decreases, the effective bearing area incre...

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Abstract

The invention discloses an online fault diagnosis method and a device for a secondary suspension air spring system. The method comprises the following steps: 1) when the air spring is subjected to a load force, deformation parameters of the air spring are acquired and according to the deformation parameters, a pressure-stiffness model for the air spring is built, wherein the deformation parameters comprise a spring height, an effective bearing area and an inner cavity volume; 2) multiple pressure values of the inner pressure of the air spring are acquired, and the multiple pressure values are inputted to the pressure-stiffness model for acquiring a stiffness decay curve of the air spring; 3) according to the stiffness decay curve, a stiffness threshold of the air spring is set; and 4) second stiffness of the air spring is acquired online, the second stiffness and the stiffness threshold are compared, and if the second stiffness is larger than the stiffness threshold, fault happens to the air spring. Defects that fault judgment is carried out on the air spring on the basis of the traditional visual inspection and experience judgment, and thus accuracy is low can be overcome.

Description

technical field [0001] The invention relates to the field of fault diagnosis of suspension systems such as trams, subways, light rail transportation, suburban railways, and monorail maglev transportation, and in particular to an online diagnosis method and device for faults of secondary suspension air spring systems. Background technique [0002] With the rapid growth of my country's national economy, the acceleration of urbanization, the rapid development of urban economy and the rapid increase of urban population, the demand for travel and transportation of urban residents has risen rapidly. Although large and medium-sized cities have expanded urban road construction, they are still facing serious challenges traffic pressure. The development of urban rail transit has become the best way to solve the current traffic difficulties in major cities. By the end of 2014, the mileage of urban rail transit lines in operation in China had exceeded 2,000 kilometers. Nearly 30 cities...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/00F16F9/32
Inventor 贺德强徐刘峰李笑梅苗剑刘旗扬任崇会
Owner GUANGXI UNIV
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