Micro friction force measuring device

A measuring device and micro-friction technology, applied in the direction of measuring devices, mechanical devices, instruments, etc., can solve the problems such as difficulty in achieving the accuracy of friction sensors, coupling between axes, affecting the accuracy of friction measurement results, etc. The effect of system friction, reducing the effect of coupling

Active Publication Date: 2013-03-27
TSINGHUA UNIV
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Problems solved by technology

[0005] Therefore, when the traditional commercial general-purpose friction testing machine is used to measure the micro-friction force under the phenomenon of super-slip, the following problems will occur: First, the accuracy of the friction sensor is difficult to meet the accuracy required by the friction measurement experiment under the super-slip state
Secondly, there is an inter-axial coupling phenomenon (usually ≥ 1%) in the two-dimensional force measurement sensor, which has a greater impact on the accuracy of friction measurement in the super-slip state than in the conventional experimental state
In addition, when there is a large difference between the friction force and the load, if there is an assembly deflection of the friction sensor and loading components, the load will produce a component in the friction measurement direction, which will affect the accuracy of the friction measurement results in the super slippery state

Method used

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Embodiment Construction

[0023] The micro-friction measurement device provided by the specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0024] Please refer to figure 1 , the embodiment of the present invention provides a micro-friction measurement device 100, which is used to measure the micro-friction force of two samples. The micro-friction measurement device 100 includes a frame 10, and an upper The sample carrying unit 20 and the lower sample carrying unit 40 . The upper sample carrying unit 20 and the lower sample carrying unit 40 are used to contact the upper sample and the lower sample and generate relative displacement and relative rotation in the horizontal direction, so that micro-friction occurs between the two samples, and then the micro-friction is tested by the measuring unit. friction.

[0025] The frame 10 includes a table top 11, preferably, the table top 11 is a planar structure.

[0026] Such as figur...

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Abstract

The invention relates to a micro friction force measuring device which comprises a rack (10), as well as an upper sample bearing unit (20) and a lower sample bearing unit (40) which are adjacently arranged on the rack (10), wherein the upper sample bearing unit (20) comprises a bearing (23), a cross beam (24), a friction force measuring unit (25) and a load measuring unit (26); and the cross beam (24) is arranged at the upper end of the bearing (23) in a crossing way, the friction force measuring unit (25) and the load measuring unit (26) are respectively arranged at two ends of the cross beam (24), and the cross beam (24) is connected with an upper sample by the load measuring unit (26).

Description

technical field [0001] The invention relates to a micro-friction force measuring device, in particular to a micro-friction force measuring device for accurately measuring micro-friction force. Background technique [0002] About 1 / 3-1 / 2 of the world's energy is consumed in the form of heat through friction and wear, and reducing friction has become an important direction for energy conservation. In engineering, the friction state when the friction coefficient is less than 0.01 is generally called the "super-slip" state, and it is of great significance to explore the mechanism of the "super-slip" phenomenon. Experiments have found that ceramic materials such as silicon nitride and silicon dioxide can have a friction coefficient as low as 0.003 in some aqueous solutions, showing a super slippery phenomenon. [0003] Traditional commercial general-purpose friction testing machines generally use two-dimensional force measurement sensors to simultaneously measure the load and fr...

Claims

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Application Information

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IPC IPC(8): G01N19/02
Inventor 张晨辉孙亮李津津
Owner TSINGHUA UNIV
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