Rotation type cavitation erosion and erosive wear synergistic testing apparatus

Abstract

The invention discloses a rotation type cavitation erosion and erosive wear synergistic testing apparatus. A variable frequency motor is mounted at the upper end of a bell housing; the upper end of a stirring shaft is connected with the rotating shaft of the variable frequency motor through a coupler; the lower end of the stirring shaft penetrates through an upper cover plate and a lower cover plate of a turntable to be fixed; isosceles triangular test piece mounting grooves are uniformly distributed in the positions, which are located between the upper cover plate and the lower cover plate of the turntable and are 5 / 6 away from the circumferential radius; basic angles of the isosceles triangular test pieces are 45 degrees each; the vertical angles of the test piece mounting grooves face up and are identical in orientation; isosceles triangular cavitation induction unit grooves with different vertical angles are uniformly distributed in the positions which are located between the upper cover plate and the lower cover plate of the turntable and are 5 / 6 away from the circumferential radius at the interval of 90 degrees; the vertical angles of the isosceles triangular cavitation induction unit grooves are identical in orientation, and are opposite to the orientation of the vertical angles of the test piece mounting grooves; the test pieces with the same structure are respectively mounted in the test piece mounting grooves anticlockwise in the angles of 5 degrees, 95 degrees, 185 degrees and 275 degrees. The rotation type cavitation erosion and erosive wear synergistic testing apparatus disclosed by the invention can be applied to failure analysis, wear rate test, risk inspection and service life prediction for cavitation erosion and erosive wear damage of valves in the field of coal chemical industry.

Description

technical field [0001] The invention relates to a multiphase flow wear test device, in particular to a rotating cavitation and erosion wear synergy test device. Background technique [0002] Regulating valves are usually installed directly on system pipelines, and are widely used in process industries such as petroleum, coal chemical industry, and chemical fiber, and play a very important role in the development of the national economy. [0003] The study found that the failure forms of control valves are various and the mechanism is complex, among which the valve failure caused by erosion wear and cavitation (cavitation erosion) damage is the most common and common failure form of control valves in the process of throttling. Erosion wear damage has obvious locality, suddenness and risk, especially the wear thinning caused by the flow of solid particles and multiphase flow medium is more complicated and difficult to predict; cavitation damage is caused by the valve downstrea...

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Problems solved by technology

[0006] (1) At present, the research on the mechanism of multiphase flow wear in my country is not deep enough, and it takes a long time to set up related equipment, so it is difficult to extend the experimental results to engineering applications

[0007] (2) Many studies are limited to the study of a single wear form of scouring wear or cavitation damage, and there are few reports on the synergistic effect of the two wear forms, which cannot reveal the damage mechanism of valves and other hydraulic machinery under the two failure forms

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