Title:
ホースの劣化判定方法
Document Type and Number:
Japanese Patent JP7323770
Kind Code:
B2
Abstract:
To provide a hose deterioration determination method that can readily determine a deterioration degree of inner surface rubber of a hose with high accuracy.SOLUTION: A hose deterioration determination method is configured to: set a time required until an elongation Eb when inner surface rubber 4 fractures in a prescribed temperature condition drops to a reference elongation Ex as a life of the inner surface rubber 4 in the prescribed temperature condition; perform advance testing, grasp a correlation relationship R between lives in a plurality of temperature conditions and the temperature condition, and input the correlation relationship R to a computation unit 10; segment temperature data on a fluid F in a fluid passage 3 detected by a temperature sensor 9 into a plurality of prescribed temperature ranges; integrate a use time of the hose 2 every each temperature range by the computation unit 10; calculate a thermal aging life of the inner surface rubber 4 on the basis of each representative temperature with the representative temperature in each temperature range as the temperature condition, and the correlation relationship R; and determine a deterioration degree of the inner surface rubber 4 on the basis of a comparison of an integration use time of the hose 2 in each temperature range with a length of the thermal aging life of the inner surface rubber 4.SELECTED DRAWING: Figure 8
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Inventors:
Susumu Hatanaka
Application Number:
JP2019091024A
Publication Date:
August 09, 2023
Filing Date:
May 14, 2019
Export Citation:
Assignee:
Yokohama Rubber Co., Ltd.
International Classes:
G01N17/00; G01N25/00; G01N33/44
Domestic Patent References:
| JP11344431A | ||||
| JP2014025753A | ||||
| JP2011067413A | ||||
| JP5312660A |
Foreign References:
| US8829929 |
Attorney, Agent or Firm:
Clear stream international patent attorney corporation
Takayoshi in the daytime
Masao Sakaizawa
Takayoshi in the daytime
Masao Sakaizawa
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