Method for measuring pressure of hydrodynamic force contact area by using quantum dots

A technology of fluid power and quantum dots, applied in the direction of fluid pressure measurement using optical methods, can solve problems such as engineering application limitations, low signal-to-noise ratio, and easy damage, and achieve high versatility, high practicability, and stability good sex effect
CN113686481AInactive Publication Date: 2021-11-23XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XI AN JIAOTONG UNIV
Publication Date
2021-11-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method for measuring the pressure of a hydrodynamic force contact area by using quantum dots comprises the following steps: (1) performing different pressure calibration on a quantum dot solution to obtain a quantum dot photoluminescence energy-pressure calibration curve; and (2) adding the prepared quantum dot solution as a lubricating fluid into a lubricating area, forming a fluid film doped with quantum dots in an elastohydrodynamic lubricating contact area, calculating photoluminescence energy of spectral information by using a laser as an excitation light source, and comparing the photoluminescence energy with a quantum dot photoluminescence energy-pressure calibration curve to obtain fluid dynamic contact area pressure to realize the real-time measuring of the contact area fluid film pressure. The method has the advantages of high universality, good stability, non-contact type and the like; and an innovative thought and method are provided for hydrodynamic contact area monitoring, and meanwhile, necessary technical reference is provided for pressure monitoring in the field of fluid lubrication of major equipment.
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Description

technical field

[0001] The invention relates to the technical field of fluid lubrication, in particular to a method for measuring the pressure in a fluid dynamic contact zone by using quantum dots. Background technique

[0002] Fluid lubrication is widely used in aerospace, automobile and other fields. Minimizing the friction and heat dissipation in the lubrication process is of great significance to realize the high-speed operation of equipment for a longer period of time. The rheological behavior and friction response of the fluid inside the lubrication are directly related to the local pressure and temperature at each point in the contact area. Therefore, an accurate understanding of the pressure in the hydrodynamic contact on a spatial scale compatible with the contact size is very important for analyzing the fluid lubrication process. It is of great significance to realize the high-speed operation of the equipment.

[0003] At present, with the development of various d...

Claims

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