Method for testing static friction coefficient of material in high-temperature and high-pressure water environment
A technology of static friction coefficient, high temperature and high pressure water, applied in the direction of analyzing materials, measuring devices, instruments, etc., can solve the problems of industrial production economy, unfavorable safety, difficult static friction coefficient measurement, no standardized test method, etc., and achieve conservative and reliable results. , Great application value, simple test method
Active Publication Date: 2016-08-17
SUZHOU NUCLEAR POWER RES INST +2
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Problems solved by technology
[0007] At present, ASTM and other international general industry standards only standardize the test methods for some very simple combinations of friction pair types, contact forms, and environmental conditions. There is no standard test method for the combination of conditions
Therefore, at present, no matter in the design stage or the operation evaluation stage, the value of the static friction coefficient between the friction pairs is usually only referred to the similar situation in the mechanical manual, and the reference value in the mechanical manual is often related to the type of friction pair and contact form of the actual engineering components. , environmental conditions and other conditions do not match, so that the design or evaluation safety factor will be too large or too small, which is not good for the economy and safety of industrial production
Especially for components serving in the high temperature and high pressure airtight container environment, due to the limited use of load sensors and displacement sensors in high temperature and high pressure water (or steam) environments, it is even more difficult to measure the coefficient of static friction
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[0046] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0047] In this embodiment, the measurement method and principle of the static friction coefficient in this application are illustrated by taking the static friction coefficient measurement of the most common flat plate and pipe line contact in engineering applications as an example, wherein the flat plate is the first sample 1, and the pipe is the second sample 2. The static friction measurement test is carried out on a conventional tensile testing machine.
[0048] see image 3 Shown is the used test device of this test experiment, and it comprises the high-temperature and high-pressure container that is fixed on the support of tensile testing machine, what this high-temperature and high-pressure container adopts is autoclave 5, can be arranged as and to be tested in this autoclave 5 High temperature and high pressu...
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The invention discloses a method for testing the static friction coefficient of a material in high-temperature and high-pressure water environment, and provides a test method for measuring the static friction coefficient of a material in high-temperature and high-pressure special service environment. The method comprises the following steps: measuring the load-displacement / time relationship curve under and without compacting force applied between friction pairs, ingeniously using the direct proportion of the compression force of a spring to the compression amount to realize decomposition of two physical processes of kinetic friction between sealing members and static friction between the friction pairs, and solving to obtain a friction force-displacement / time relation curve in order to conveniently obtain the static friction coefficient of the material in the high-temperature and high-pressure water environment. The method can realize measurement of the static friction coefficient of the material in the high-temperature and high-pressure closed environment only through using a routine test device without a high-temperature and high-pressure environment load sensor and a displacement sensor, and the method also has the advantages of simplicity, low cost, conservative and reliable result, and large application values in engineering design or assessment.
Description
technical field [0001] The invention relates to a method for testing the static friction coefficient of materials in a high-temperature and high-pressure water environment. Background technique [0002] Friction performance is one of the basic properties of materials. The friction performance of a certain material can be characterized by the static and dynamic friction coefficients of the material. Among them, the static friction coefficient is defined as the ratio of static friction to normal force (static friction is the relative maximum resistance at the start of the move). In actual engineering design and evaluation, the coefficient of friction is one of the key parameters for calculating the structural stability of components, especially the coefficient of static friction, which is a key parameter for judging components from stability to instability, and needs to be obtained through experiments. [0003] In the prior art, the general test principle for measuring the co...
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IPC IPC(8): G01N19/02
CPCG01N19/02
Inventor梅金娜任红兵薛飞朱勇张路邱桂辉冯亚飞
OwnerSUZHOU NUCLEAR POWER RES INST