Prediction method of storage life of pressure relay based on step-down accelerated degradation test
A technology of step-down acceleration and prediction method, which is applied in the field of accelerated test and accelerated test of electromechanical products, and can solve problems such as storage life prediction of unseen pressure relays
Inactive Publication Date: 2017-05-10
NAT UNIV OF DEFENSE TECH
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Problems solved by technology
Compared with the commonly used constant and step loading methods, the step-down loading method is more efficient and takes less time, but there is no research report on the storage life prediction of pressure relays using the step-down accelerated degradation test.
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[0056] The method of the present invention will be further described below by taking a certain type of pressure relay as an example. It should be pointed out that the following examples are only used to illustrate the specific implementation of the method of the present invention, but not for limiting the protection scope of the method of the present invention.
[0057] A method for predicting the storage life of a pressure relay based on a step-down accelerated degradation test includes the following steps:
[0058] Step 1. Design the step-down accelerated degradation test plan of the pressure relay:
[0059] 1-1 The temperature is used as the accelerated stress of the test;
[0060] 1-2 Different temperatures are used as the accelerated stress level of the test, such as figure 1 Shown, from high temperature to low temperature are S 1 =100℃, S 2 =85℃, S 3 =72°C and S 4 =60℃, the number of accelerated stress levels I is 4; record the i-th accelerated stress level as S i...
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The invention discloses a pressure relay storage life prediction method based on a step-down degradation acceleration test. The pressure relay storage life prediction method comprises the following steps that (1) a pressure relay step-down degradation acceleration test scheme is designed; (2) all pressure relay samples are placed into a temperature test box to be tested; (3) according to the test scheme, the test is conducted at each acceleration stress level, and all the samples are subjected to a performance test one by one; (4) performance data obtained from the test are used for modeling the performance degradation process of the pressure relays, and then the storage life of the pressure relays commonly stored in a storehouse is predicted. The pressure relay storage life prediction method can reflect the performance degradation process of the pressure commonly stored in the storehouse, conducts the acceleration test at a large acceleration coefficient, shortens the test time, and provides a practicable technical method for research in pressure relay storehouse storage life.
Description
technical field [0001] The invention belongs to the technical field of accelerated testing of electromechanical products, and in particular relates to an accelerated testing method for evaluating the storage life of a pressure relay under conventional storage conditions in a warehouse by testing and analyzing performance degradation data of a pressure relay under a step-down accelerated degradation test. Background technique [0002] Pressure relay is an electromechanical product that uses the pressure of oil or gas to open and close electrical contacts. It is widely used in aerospace, mechanical engineering, weaponry and other fields. The main function of the pressure relay is that when the fluid pressure in the hydraulic / pneumatic system reaches a predetermined value, start the electrical signal to make the electrical components (such as electromagnetic relay, motor, electromagnetic clutch, etc.) Functions such as sequence action. During the storage process of the pressur...
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IPC IPC(8): G01R31/327
Inventor 谭源源张春华汪亚顺陈循罗巍申晔鲁相万伏彬方鑫
Owner NAT UNIV OF DEFENSE TECH