Method for predicting railway vehicle relay work failure rate
A rail vehicle and relay technology, which is applied in the field of predicting the failure rate of rail vehicle relays, can solve the problem of affecting the accuracy and credibility of relay failure rate predictions, and cannot accurately represent the basic failure rate of standard relay products, and cannot reflect truly and specifically Issues such as the degree of influence of relays, to achieve good market prospects, increase credibility, and save manpower
Active Publication Date: 2014-12-24
CRRC NANJING PUZHEN CO LTD
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[0002] Relay failure rate prediction is the data basis for reliability design. If GJB / Z299C-2006 "Electronic Equipment Reliability Prediction Manual" is used to predict relay failure rate, the factors and parameters that need to be determined include basic failure rate, environmental coefficient, There are 8 factors including quality factor, contact form factor, application factor, structure factor, action rate factor and rated load factor, and because there is no quality, structure and other information, the quality and structure factor cannot be obtained and the basic failure rate is the highest in the product industry. Statistics, but cannot accurately represent the basic failure rate of relay products of a certain specification. At the same time, the application environment adopts the general mobile category GM1, which cannot truly and specifically reflect the degree of influence of the relay on the environmental conditions of the train. These defects affect the prediction of the failure rate of the relay. accuracy and credibility
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[0016] Below in conjunction with example the present invention is described in further detail. However, the invention is not limited to the examples given.
[0017] Take the model F470-H4V-XUV relay provided by the supplier leach as an example. The rated voltage of the relay is 110V, the rated resistive load is 0.5A, the contact form is 4 DC single-break contacts, and the relay has surge control. . The rated working temperature is -40-85℃, the working environment temperature is 55℃, and the quality level is MIL-R-6106, CEECC16101-020, NFF62-002-2.
[0018] 1. Past project data (as shown in Table 1)
[0019] In the first (i=1) project (Shenzhen Line 4 subway project), the emergency brake relay (EBR) uses the above-mentioned specification relay, and its action rate is 0.6 times / hour, and the action rate coefficient ∏ CYC 1 =0.1, the working current is 50mA, the total running mileage during the warranty period is D 1 =10849808km, total failure times N 1 = 2, the actual fail...
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The invention relates to a method for predicting the railway vehicle relay work failure rate. The method is achieved based on relay data in the past, compared with the traditional method that the relay work failure rate is predicted according to the standard, influencing factors are reduced to two, and a large amount of manpower can be saved. Other data are all from past projects, and credibility of the new project relay work failure rate is greatly increased. Compared with the fact that the relay work failure rate is predicted by utilizing the traditional standard, the method is simple, hundreds of relays are designed and used in a train, and the method can save a large amount of manpower and time. Calculation of the rated basis failure rate is conducted through the method for predicting the railway vehicle relay work failure rate, a relay rated basis failure rated data bank is built further, data support is provided for type choosing of relays of different manufactures and different standards, and the basis is provided for train reliability level improvement.
Description
technical field [0001] The invention relates to a method for predicting the working failure rate of a rail vehicle relay, and belongs to the technical field of working failure rate prediction of reliability components. Background technique [0002] Relay failure rate prediction is the data basis for reliability design. If GJB / Z299C-2006 "Electronic Equipment Reliability Prediction Manual" is used to predict relay failure rate, the factors and parameters that need to be determined include basic failure rate, environmental coefficient, There are 8 factors including quality factor, contact form factor, application factor, structure factor, action rate factor and rated load factor, and because there is no quality, structure and other information, the quality and structure factor cannot be obtained and the basic failure rate is the highest in the product industry. statistics, but cannot accurately represent the basic failure rate of relay products of a certain specification. At t...
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IPC IPC(8): G01R31/327
Inventor 薛淑胜宋雪松丁莉盛银胜朱爱凤
Owner CRRC NANJING PUZHEN CO LTD