Force measurement device applicable to high-temperature and high-pressure environment

Abstract

The invention discloses a force measurement device applicable to a high-temperature and high-pressure environment. A dynamic sealing connection manner of a stretching shaft and a high-pressure kettlein the prior art is avoided so that a kinetic friction force of a sealing ring does not need to be considered; the friction force of a friction pair can be directly measured through a force sensor andmeasured data is more accurate and reliable; meanwhile, in the force measurement device, an underwater force sensor applicable to a room-temperature and high-pressure environment which can be purchased in the market is used for directly measuring the force; the technical problem that the measured data is not accurate, caused by the fact that a force sensor applicable to the high-temperature and high-pressure environment does not exist, is overcome.

Description

technical field [0001] The invention relates to a force measuring device suitable for high temperature and high pressure 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] At present, ASTM and other international general industry standards only standardize the test methods fo...

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Problems solved by technology

[0003] 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 high-temperature and high-pressure airtight container environments, 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

[0004] In the prior art, in order to obtain the coefficient of static friction between parts under high temperature and high pressure water or steam environment, the sample is usually placed in a high temperature and high pressure airtight container for testing. Under the condition of the force sensor to directly measure the friction of the sample, so the current static friction coefficient is obtained through indirect measurement and calculation

In the process of obtaining the coefficient of static friction through the above calculation, the friction force of the sealing element in the test device must be taken into account, and the friction force is not a stable value, and its fluctuation is relatively large and irregular. Therefore, the static friction coefficient obtained by measuring and calculating in this way value is not accurate enough

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