Cavitation prediction method, cavitation prediction apparatus and cavitation prediction experimental device
A prediction method and technology of experimental equipment, applied in the direction of measuring equipment, testing wear resistance, instruments, etc., can solve the problem of inability to predict the degree of material damage
Inactive Publication Date: 2018-11-13
HITACHI LTD
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Problems solved by technology
[0005] In order to solve the problem that the existing technology cannot predict the occurrence of cavitation and the degree of material damage
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[0017] In order to make the purpose and technical solutions of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Apparently, the described embodiments are some, not all, embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0018] Figure 1a -b and figure 2 An exemplary cavitation prediction experimental device 100 for implementing the cavitation prediction method is shown, the device includes a main body 110 , a first cover 120 , a second cover 130 , a chamber 140 , and a sample holder 150 . The main body 110 includes a safety valve hole 111 , a drain valve hole 112 , and an ob...
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The invention provides a cavitation prediction method, a cavitation prediction apparatus and a cavitation prediction experimental device. The cavitation prediction method includes the steps of receiving basic data necessary to prediction and real-time vibration data from a sensor; calculating a coefficient of relationship between cavitation damage degree and elastic modulus of material; establishing a predictive relationship between the real-time vibration data and the cavitation damage degree according to a physical relationship between the real-time vibration data and the elastic modulus; predicting time for the material to experience cavitation and damage degree of the material according to the predictive relationship. The cavitation prediction method and apparatus can predict cavitation occurring time and damage degree of material and provide relatively accurate prediction results. The cavitation prediction experimental device is capable of simulating the influence of a real environment upon product cavitation test, and is suitable for testing the pressure that a sample bears in real time.
Description
technical field [0001] The invention relates to a cavitation prediction method, cavitation prediction equipment and a cavitation prediction experiment device. Background technique [0002] Cavitation, also known as cavitation, refers to the formation of bubbles near the solid surface when the pressure of the liquid in contact with the solid surface is lower than its saturated vapor pressure. In addition, gas dissolved in the liquid may also precipitate to form bubbles. Then, when the bubbles flow to a place where the liquid pressure exceeds the bubble pressure, the bubbles collapse, and a huge impact force and high temperature are generated at the moment of collapse. The solid surface is subjected to repeated impacts of this kind of impact force, and the material will fatigue and fall off, causing small pits to appear on the surface, and then develop into a spongy shape. In severe cases, large pits and even perforations can be formed on the surface. The degree of cavitati...
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IPC IPC(8): G01N3/56
CPCG01N3/567
Inventor 张乐福郭相龙赖平董强张旭东兼元大寺田尚平
Owner HITACHI LTD