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Reliability analysis method for hydraulic multi-way valve

An analysis method and multi-way valve technology, applied in the field of hydraulic multi-way valve reliability analysis, can solve the problems of high cost, long time consumption, inaccurate analysis and so on

Pending Publication Date: 2021-01-22
NANJING UNIV OF TECH
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Problems solved by technology

[0004] Purpose of the invention: The purpose of the present invention is to overcome the problems of high cost, long time-consuming and inaccurate analysis of the existing multi-way valve reliability analysis and testing method, and to provide a reliability analysis method that is more concise and has higher accuracy of results

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  • Reliability analysis method for hydraulic multi-way valve
  • Reliability analysis method for hydraulic multi-way valve
  • Reliability analysis method for hydraulic multi-way valve

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Embodiment Construction

[0075] The reliability analysis method of the hydraulic multi-way valve should include the following steps:

[0076] In step S1, a dendrogram is established for typical failure modes of the hydraulic multi-way valve. Such as figure 1 shown. The top event is T: the multi-way valve fails. The intermediate events are: Y1, Y2, Y3, Y4, Y5, Y6. The basic events are: X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12, X13, X14, X15. The failure mode tree diagram of the hydraulic multi-way valve described in the present invention covers typical multi-way valve failure modes, and from the four failure modes that directly lead to the failure of the multi-way valve, the causes are traced down layer by layer, and fifteen failure modes are obtained. Basic events for multiway valve failure. The basic event of the failure mode describes a certain failure form of one or some components, which is convenient for searching the failure rate corresponding to the basic event later. Considering...

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Abstract

The invention provides a reliability analysis method for a hydraulic multi-way valve. The reliability analysis method comprises the following steps: step 1, establishing a tree diagram for a typical failure mode of the hydraulic multi-way valve; 2, looking up parameters; 3, calculating a minimum cut set according to a minimum cut set algorithm; 4, drawing a logic block diagram of the failure of the multi-way valve; 5, calculating the reliability of each component or module and calculating the reliability of the hydraulic multi-way valve system according to the tree diagram; 6, analyzing the reliability and the average service life of the hydraulic multi-way valve system; 7, according to different failure modes of the hydraulic multi-way valve, analyzing the reliability and the average service life; 8, comparing and analyzing the reliability and the average service life in different failure modes to obtain the influence degree of different failure modes on the multi-way valve system; 9,solving a probability importance coefficient Ii of each basic event; 10, setting simulation parameters; and 11, carrying out analog simulation and analyzing a simulation result.

Description

technical field [0001] The invention relates to the field of mechanical hydraulic reliability analysis, in particular to a reliability analysis method of a hydraulic multi-way valve. Background technique [0002] As a common directional control valve in construction machinery, the hydraulic multi-way valve has the characteristics of compact structure, small pressure loss, long life, and simple manufacture. The harsh working environment of construction machinery, frequent reversing, and severe load changes have put forward strict requirements on the reliability of multi-way valves. Therefore, it is of great significance to analyze the reliability of multi-way valves. [0003] However, most of the existing studies on the reliability of multi-way valves provide multi-way valve reliability test benches, and the cost and time-consuming of researching multi-way valve reliability with test benches is high. Contents of the invention [0004] Purpose of the invention: The purpose ...

Claims

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Application Information

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IPC IPC(8): G06F30/20
CPCG06F30/20G06F2119/02
Inventor 殷晨波纪籽臣赵佳伟马伟马守磊宋飞
Owner NANJING UNIV OF TECH
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