A device for testing the wear resistance and cavitation resistance of materials
An anti-wear and cavitation technology, applied in the direction of testing wear resistance, measuring devices, analyzing materials, etc., can solve the problem that the flow rate and pressure of the nozzle cannot be measured, the accurate flow of the nozzle cannot be measured, and the wear resistance and resistance of materials cannot be measured. Cavitation performance and other issues, to prevent deposition, improve concentration, ensure uniformity and stability
Active Publication Date: 2020-08-28
JIANGSU UNIV
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[0004] After searching, the publication number is CN 1687741A, which is a patent named self-circulating nozzle wear resistance test device, which discloses a self-circulation nozzle wear resistance test device, which is characterized by self-circulation, self-uniformity and quantitative sand content , but it cannot measure the anti-wear and anti-cavitation performance of the material, it can only test the wear resistance of the nozzle, and the accurate flow through the nozzle cannot be measured
[0005] The announcement number is CN 204556421U, and the patent titled Jet Erosion Wear Tester discloses an abrasion tester, which is characterized in simulating the application environment of materials for flow-through parts of hydraulic turbines, to study the abrasive behavior and process of sandy water on the surface of materials, and at the same time It is possible to analyze and study the anti-abrasion performance of materials, but it faces some problems during the test, such as the flow rate and pressure of the nozzle cannot be measured, and the water cannot be recycled during the test
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Embodiment 1
[0086] The test liquid in test barrel 3 is sandy water, and the density of clean water is 1000kg / m 3 The average particle size of the sand particles is 0.1mm, the volume fraction is 2%, and the mass fraction is 10%; the speed of the test liquid sprayed by the nozzle 5 is 6m / s, and the diameter of the spray channel 16 is D 6 =5mm, the bubble volume fraction is 2%, and the bubble diameter in the sprayed test liquid 17 is 0.5mm; the pipe nominal diameter D N =20mm; the barostat ensures that the pressure in the test barrel 3 is 0.5MPa, and the required jet pressure P 2 0.6MPa, the working temperature is constant at 25 degrees Celsius, the return port diameter is L 2 Is 50mm, the liquid level of the test solution 17 is L 3 And the cylinder diameter D of the test barrel 3 4 Meet the following requirements: 500≤L 3 ≤650, take L 3 =500mm, then 250≤D 4 ≤300, take D 4 = 400mm. The distance from the circular tube to the liquid level of the test solution 17 is L 1 , L 1 ≤250mm, the centerline...
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Abstract
The invention provides a device for testing wear resistance and cavitation erosion resistance of materials. A testing bucket is provided with a testing liquid, a to-be-tested piece is hung in the testing bucket, and the device further comprises an injection system; the injection system comprises a mortar pump, a gas compression pump, a spray nozzle and a gas screening aqueduct; an inlet of the mortar pump is connected with the testing bucket, an outlet of the mortar pump is connected with the gas screening aqueduct and the spray nozzle in sequence, and the spray nozzle is arranged on the testing bucket; an air inlet is formed between the outlet of the mortar pump and the gas screening aqueduct, and the air inlet is connected with the gas compression pump; a backflow pipeline is arranged between the air inlet and the outlet of the mortar pump, and the backflow pipeline is connected with the bottom of the testing bucket; and the gas screening aqueduct is internally provided with a plurality of long straight gas screening holes distributed uniformly. The device for testing the wear resistance and cavitation erosion resistance of the materials has the advantages that the testing liquidcontaining three gas-liquid-solid phases with different concentrations can be sprayed on a to-be-tested material by controlling different jet velocities, and the wear resistance and cavitation erosion resistance of the to-be-tested material can be simulated under different situations.
Description
Technical field [0001] The invention relates to the field of anti-wear and anti-cavitation properties of materials, in particular to a device for testing the anti-wear and anti-cavitation properties of materials. Background technique [0002] Most rivers contain a lot of sand and gravel, which will cause the wear and tear of the water delivery equipment due to solid particles during the water delivery process, resulting in damage to the flow parts; in some special parts of the water delivery equipment (the pump and the impeller in the turbine) On the surface, the inner wall of the pipe corner, etc.), there will be cavitations composed of water vapor, air, special chemical gases and other gas phases in the conveyed fluid. In the process of fluid flow, the partial pressure of the fluid increases and the fluid interiors collide with each other. Due to equipment vibration and other reasons, these cavitations will collapse on the surface of the flow-passing part, and the fluid around ...
Claims
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IPC IPC(8): G01N3/56G01N3/02
CPCG01N3/02G01N3/565G01N2203/0048
Inventor 刘厚林张子龙王勇曹满辉罗凯凯王凯董亮谈明高
Owner JIANGSU UNIV