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Device and method for separating abrasive particles in lubricating oil based on surface acoustic waves

A surface acoustic wave and separation device technology, which is applied in the use of sound waves/ultrasonic waves/infrasonic waves to analyze solids, measurement devices, and use sound waves/ultrasonic waves/infrasonic waves for material analysis. It can solve the problem of non-ferromagnetic abrasive particles that cannot be separated and are not widely used , different deflection, etc., to achieve the effect of easy integration, high energy density, and high integration

Pending Publication Date: 2019-01-15
DALIAN MARITIME UNIVERSITY
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  • Abstract
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  • Claims
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Problems solved by technology

However, the filter screen in this method is easy to clog, and the abrasive particles can only be separated according to the size
The use of magnetic field to separate abrasive particles is also a common method of abrasive particle separation, that is, a high-gradient magnetic field area is arranged in the area where the lubricating oil flows, and the abrasive particles in the lubricating oil flow through this area and are deflected by the magnetic force. The magnetic force is different, the deflection is different, and finally flows to different outlets, so as to realize the separation of abrasive particles; this separation method can only realize the separation of ferromagnetic abrasive particles, and cannot separate non-ferromagnetic abrasive particles, such as copper, aluminum, tin, etc. Abrasive grains
In addition, centrifugal force, gravity, light pinching, etc. are also used to separate abrasive particles in lubricating oil, but they are not widely used due to their limitations.

Method used

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  • Device and method for separating abrasive particles in lubricating oil based on surface acoustic waves
  • Device and method for separating abrasive particles in lubricating oil based on surface acoustic waves

Examples

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Embodiment 1

[0041] Such as figure 1 As shown, a lubricating oil abrasive separation device based on surface acoustic waves includes a piezoelectric substrate 1, and the material of the piezoelectric substrate 1 is lithium niobate (128°YX-LiNbO 3 ); processing the focusing type interdigital electrode 2 and the microfluidic channel on the piezoelectric substrate 1, the main channel 5 of the microfluidic channel is perpendicular to the central axis of the interdigital electrode 2, and the geometric center of the microfluidic channel is in line with the interdigital The focus of the electrodes 2 coincides to ensure that the abrasive particles in the lubricating oil flow through this area and are subjected to the strongest sound radiation force and are shifted to varying degrees;

[0042] The interdigitated electrode 2 is a sputtered double-layer structure, the bottom layer of chromium (5 nanometers) and the upper layer of platinum (80 nanometers), which not only reduces the impedance of the i...

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Abstract

The invention relates to the technical field of lubricating oil analysis and detection, in particular to a device and a method for separating abrasive particles in lubricating oil based on surface acoustic waves. The advantages of high energy density and easiness in integration of surface acoustic waves are fully utilized in combination with a micro-flow channel of a special geometric shape processed by a soft lithography technology, thereby realizing on-line continuous separation of the abrasive particles in the lubricating oil, and laying a foundation for precise detection of the abrasive particles. The separation device and method omit the structures of a physical filter screen and the like, avoid dirty blockage, and have a high integration degree and a good on-line separation effect.

Description

technical field [0001] The invention relates to the technical field of lubricating oil analysis and detection, in particular to a device and method for separating abrasive particles in lubricating oil based on surface acoustic waves. Background technique [0002] Wear is one of the main reasons for the failure of ship power plant, and abrasive particles are the main product of wear. The size of abrasive grains is related to the degree of wear. For example, the size of abrasive grains for normal wear is generally less than 20 microns, while the size of abrasive grains for abnormal wear is generally greater than 50 microns. Therefore, extracting the size information of abrasive particles in lubricating oil is helpful for monitoring and fault diagnosis of mechanical equipment. However, in actual lubricating oil samples, the size distribution of abrasive particles is very wide (for example, from a few microns to hundreds of microns), which brings great difficulties to the accur...

Claims

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Application Information

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IPC IPC(8): G01N29/04B01L3/00
CPCG01N29/046B01L3/00
Inventor 刘志坚于可真高跃峰宋永欣潘新祥
Owner DALIAN MARITIME UNIVERSITY
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