Abrasion generator

A generator and abrasion technology, applied in instruments, scientific instruments, testing wear resistance, etc., can solve problems such as the inability to measure the effect of sediment abrasion on material abrasion

Inactive Publication Date: 2009-06-10
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far, there has not been a relatively consistent view on the mechanism of abrasion: whether there is a critical sediment concentration in the influence of sediment content on abrasion, and if so, what is the critical sediment concentration; whether the influence of sediment particle size on abrasion exists Critical particle size, if present, how is the critical particle size calculated
To remove the effect of cavitation, it is imminent to explore the law of sediment wear, but in the traditional magnetostrictive oscillator, because there is no sediment
[0005] moving device, unable to measure the effect of sediment abrasion on material abrasion

Method used

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Experimental program
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Effect test

Embodiment 1

[0029] The silt is selected from the Yangtze River silt, and the particle size of the silt is: 0.300~0.600mm, 0.038~0.054mm and 0.013~0.018mm; the sediment content is 20kg / m 3 .

[0030] The vibration frequency of the magnetostrictive oscillator used in this embodiment is 19.6 kHz, the amplitude is 50 μm, the power is 1100 W, the test piece is No. 45 steel, and the test solution used is water. Before the test, first clean the test piece with acetone solution in an ultrasonic cleaner, then dry it, and when it is naturally cooled to room temperature, weigh it on an electronic analytical balance with an accuracy of 0.1 mg, and record the measurement results. Such as Figure 5Shown, in the container 14 that test solution is housed of the present invention, put into certain content (the sand content of this test is all 20%), the silt of certain grain size, then add certain water again, open controller 23 Turn on the power switch, adjust the controller 23, observe the effect of th...

Embodiment 2

[0033] The specimen used in the test is still No. 45 steel. The sediment is selected from the Yangtze River sediment, and the sediment content is: 5kg / m 3 、50kg / m 3 and 85kg / m 3 . The particle size of the sediment is 0.300-0.600mm. Test method and test condition are exactly the same as embodiment one.

[0034] According to the measured data of the test, the relationship curve of the mass loss by abrasion of the test piece, the sand concentration and the test time is drawn, see Figure 7 , where C1>C2>C3. Depend on Figure 4 It can be seen that for this sediment particle size, the greater the sediment content, the greater the mass loss per unit time.

[0035] As can be seen from the above two embodiments, the device has the following advantages:

[0036] It can measure the effect of different particle sizes and different contents of sediment on abrasion;

[0037] It overcomes the disadvantage that the traditionally used magnetostrictive oscillator can only measure the ...

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Abstract

An abrasion generator for measuring abrasion function of slit consists of magnetostriction oscillator and container containing with test liquid. It is featured as erecting test-piece on variable-amplitude rod of megnetostriction oscillator, using water containing sand as test liquid contained in said container, arranging agitator formed by blade and motor in said container.

Description

technical field [0001] The invention relates to an abrasion generator used for measuring the abrasion of sand on the surface of a hydraulic machine flow-through component. Background technique [0002] When the water flow carries suspended sediment and moving sediment, the hard sand particles with a certain kinetic energy repeatedly impact and cut the surface of the hydraulic machinery flow parts, and at the same time, the high-speed water flow is formed when the pressure changes along the way. The cavitation in the high-pressure area bursts to generate a large impact pressure, which impacts the surface of the flow-passing part. The damage to the surface of the flow-passing part caused by these two effects is called abrasion. The water turbines of hydropower stations and water pumps of pumping stations in sandy rivers often cause partial early failure due to abrasion, resulting in reduced efficiency, reduced service life, and greatly increased equipment maintenance costs, re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N17/00G01N3/56
Inventor 吴建华王荣克吴伟伟阮仕平
Owner HOHAI UNIV
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