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Accelerated aging model and service life evaluation method of fluororubber sealing product under compression load

A technology of accelerated aging and compressive load, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of not establishing a comprehensive model for accelerated aging of carboxynitrosofluororubber, and not giving quantitative descriptions.

Active Publication Date: 2016-08-10
BEIHANG UNIV
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Problems solved by technology

Analyzing the existing relevant data, the compression ratio is often used as an index to measure the compression load of the rubber. Some literatures have studied the influence of the compression ratio on the compression permanent deformation of carboxynitroso fluororubber through accelerated aging tests, and given the results according to the test results. However, a comprehensive model for the accelerated aging of carboxynitroso fluororubber including compression ratio parameters has not been established, nor has a quantitative description of the effect of compression ratio on the compression permanent deformation of carboxynitroso fluororubber

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  • Accelerated aging model and service life evaluation method of fluororubber sealing product under compression load
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  • Accelerated aging model and service life evaluation method of fluororubber sealing product under compression load

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Embodiment Construction

[0080] See Figure 1-4 , the present invention will be described in further detail below in conjunction with example and accompanying drawing.

[0081] A certain type of carboxynitroso fluororubber seal product was subjected to accelerated aging tests under the conditions of compression ratios of 20%, 30%, and 40%, and three temperature stresses of 70°C, 90°C, and 110°C were carried out at each compression ratio. In the test, the compression set is used as the aging index. For the test data of the 9 groups of tests, see Figure 2-4 .

[0082] The present invention is an accelerated aging model and life evaluation method of fluorine rubber sealing products under compressive load, see figure 1 As shown, the specific implementation steps are as follows:

[0083] Step 1: Establish a comprehensive model of accelerated aging

[0084] The comprehensive model of the change law of carboxynitroso fluororubber compression permanent deformation ε with aging time τ is:

[0085] ...

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Abstract

The invention discloses an accelerated aging model and service life evaluation method of fluororubber sealing product under compression load. The accelerated aging model and service life evaluation method comprises the following implementation steps: 1) establishing an accelerated aging comprehensive model; 2) solving a parameter [Alpha] according to a principle that a difference value between a prediction value and an experiment value is minimum; 3) determining an accelerated model parameter; and 4) carrying out service life estimation. According to the invention, based on a great quantity of actual observation data and test data, by searching the change law of the compression set of carboxy nitroso fluororubber along with aging time under the compression load, a mathematical relationship between a compression ratio and a rubber aging model is established, a comprehensive model which describes the change law of the compression set of carboxy nitroso fluororubber along with aging time under the compression load is determined, and the model parameter is solved according to accelerated aging experiment data so as to evaluate the service life of the carboxy nitroso fluororubber sealing product. The accelerated aging model and service life evaluation method have an important meaning for evaluating the service life of the carboxy nitroso fluororubber sealing product under the compression load, and exhibits high operability and applicability.

Description

technical field [0001] The invention relates to an accelerated aging model and life evaluation method of fluororubber sealing products under compressive loads. It aims at carboxyl nitroso fluororubber sealing products, based on a large number of actual observation data and test data, and establishes a description of the carboxyl group under compressive loads. A comprehensive model of the compression permanent deformation of nitrosofluororubber with aging time, and based on this, an accelerated aging test evaluation method for carboxynitrosofluororubber sealing products was established. It is suitable for the design and evaluation of the service life of carboxynitroso fluororubber seal products under compressive load. Background technique [0002] Carboxynitroso fluororubber is widely used in various equipment systems due to its good mechanical properties, high temperature resistance and sealing properties. With the passage of time, rubber aging has become an unavoidable pro...

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Application Information

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IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 马小兵王红雨王晗赵宇
Owner BEIHANG UNIV
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