Optimization design method for storage life of rubber seal ring
A rubber sealing ring and storage life technology, which is applied in the field of life testing and evaluation of elastic devices, can solve the problem that the failure criteria of sealing rings are very different, and the work of sealing performance design and life analysis work cannot be well combined and coordinated. Issues that affect life expectancy assessment results, etc.
Active Publication Date: 2014-12-24
CASIC DEFENSE TECH RES & TEST CENT
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[0003] At present, in the engineering application of rubber seals, the sealing performance design work and life analysis work cannot be well combined and coordinated.
There is a phenomenon of two skins in the performance design and life analysis of the sealing ring, which is specifically manifested in: in the rubber seal design, the designer only gives the approximate compression rate range of the rubber sealing ring from the perspective of performance design, without considering the rubber sealing ring. The impact of aging on the life of the sealing ring; at the same time, in the evaluation of the storage life of the rubber sealing ring, reliability engineers have carried out a large number of aging tests on the rubber sealing ring, but they cannot use the test results to accurately predict the life of the sealing ring
On the one hand, this is due to the fact that the failure criteria of the sealing rings selected in each test are very different, which directly affects the life evaluation results; The life of the rubber sealing ring has a great influence, so it is difficult to apply the test results under a certain compression rate to the actual engineering situation
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[0039] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0040] As an embodiment of the present invention, nitrile rubber 5176S is selected to carry out deformation rate accelerated aging test.
[0041]1. Conduct accelerated aging tests on nitrile rubber 5176S at different installation compression ratios and different temperatures. In this example, the deformation rate h(t) / h of nitrile rubber 5176S at the installation compression rate of 24%, 19% and 14%, and the temperature of 75°C, 85°C and 95°C were respectively tested 0 , the data are shown in Table 1, Table 2 and Table 3.
[0042] Table 1 Accelerated aging test data of nitrile rubber 5176S (installation compression rate 24%)
[0043]
[0044] Table 2 Accelerated aging test data of nitrile rubber 5176S (installation c...
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The invention discloses an optimization design method for the storage life of a rubber seal ring. The method includes the steps of conducting the aging acceleration test on a rubber test piece under different installation compression ratios and different temperatures to contain a test curve of the deformation rate and the aging time tau of the rubber test piece, determining A, K and/or alpha through the least square method, determining Z and delta E/R through the least square method, calculating the As value, the value (please see the symbol in the specification) and the Ks value under different installation compression ratios and the storage temperature of Ts, and substituting the values into the formula (please see the formula in the specification) to obtain the aging time tau under different installation compression ratios. By considering the rule of influences of compression ratios on the storage life of the rubber seal ring, the prediction of the life of the rubber seal ring is more accurate; the storage life of the rubber seal ring can be prolonged through optimization design, and guidance is provided for the life design of the seal ring.
Description
technical field [0001] The invention relates to the technical field of life testing and evaluation of elastic devices, in particular to a storage life optimization design method for rubber sealing rings. Background technique [0002] The rubber ring sealing ring is a rubber ring with a circular cross-sectional shape. Rubber sealing ring is the most widely used seal in hydraulic and pneumatic systems. The rubber sealing ring has good sealing performance, which can be used in both static and dynamic sealing; it can not only be used alone, but also a basic part of many combined sealing devices. It has a wide range of applications, and if the material is selected properly, it can meet the requirements of various media and various motion conditions. [0003] At present, in the engineering application of rubber seals, the sealing performance design work and life analysis work cannot be well combined and coordinated. There is a phenomenon of two skins in the performance design a...
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IPC IPC(8): G01M13/00
Inventor 张生鹏
Owner CASIC DEFENSE TECH RES & TEST CENT
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