| CHEN Hongchao,MA Jun,XIONG Xin,LI Xiang.Analysis of Erosion Wear Characteristics of Check Valve Gap Flow Field of High-pressure Diaphragm Pump[J],53(3):123-131 |
| Analysis of Erosion Wear Characteristics of Check Valve Gap Flow Field of High-pressure Diaphragm Pump |
| Received:February 05, 2023 Revised:September 11, 2023 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2024.03.012 |
| KeyWord:check valve erosion wear gap flow field solid-liquid two-phase flow numerical simulation |
| Author | Institution |
| CHEN Hongchao |
Faculty of Information Engineering and Automation,Kunming , China |
| MA Jun |
Faculty of Information Engineering and Automation,Kunming , China ;Key Laboratory of Artificial Intelligence in Yunnan Province, Kunming University of Science and Technology, Kunming , China |
| XIONG Xin |
Faculty of Information Engineering and Automation,Kunming , China ;Key Laboratory of Artificial Intelligence in Yunnan Province, Kunming University of Science and Technology, Kunming , China |
| LI Xiang |
Faculty of Information Engineering and Automation,Kunming , China |
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| Abstract: |
| A reciprocating high-pressure diaphragm pump is the core power equipment of a long-distance slurry pipeline, which is very important in the actual long-distance transportation of fine iron ore. As a key component of the diaphragm pump, the check valve is prone to erosion wear, one of the main reasons for the failure of check valve. Therefore, the work aims to explore the causes and main affecting factors of erosion wear in the flow field of check valve gap of diaphragm pump, and improve the research system of pump valve failure mechanism, so as to provide a reference for the optimization design of pump valves in production practice. Based on the basic theory of solid-liquid two-phase flow and the erosion wear model, the operation mechanism and parameters of the check valve were integrated in consideration of the particle protection effect and the erosion effect, and the computational fluid dynamics (CFD) method was used to simulate the erosion wear behavior of the check valve gap flow field. The erosion wear characteristics of the valve gap and the effects of parameters such as the volume fraction of the mineral powder particles, the particle size, the half cone angle of the check valve, and the height of the rubber pad on the erosion wear characteristics of the check valve were investigated. It was found that the erosion damage to the valve core wall was dominant in the slurry system, and the erosion wear of the pump valve was mainly caused by the erosion of the wall due to the shear movement of the particles close to the solid wall. The erosion wear of slag particles on the valve core mainly occurred on the side wall surface of the valve disc and the prominent position of the rubber pad structure. The slurry flow rate, slurry parameters and check valve structure parameters had a great effect on erosion wear. The increase in the volume fraction of the ore powder particles aggravated the damage degree of the particles on the wall surface of the valve core. When the volume fraction of the ore powder particles increased from 0.1 to 0.5, the maximum erosion wear rate caused by erosion decreased and the average erosion wear rate caused by erosion increased at three different inlet velocities. When the particle size of the ore powder was 0.025-0.048 mm, the average erosion wear rate increased with the increase of the particle size of the ore powder. When the particle size of the ore powder exceeded 0.048 mm, the average erosion wear rate gradually decreased. Increasing the half-cone angle could alleviate the erosion wear of the particles on the wall surface. When the half-cone angle of the check valve increased from 30° to 45°, the maximum flow velocity in the valve gap decreased from 12.23 m/s to 9.19 m/s, and the maximum erosion wear rate of the slag particles on the wall surface of the valve core decreased by 41.16%. The maximum flow velocity and erosion wear rate of the valve gap flow field increase with the increase of the height h of the gasket, and the erosion wear area gradually concentrates to the protruding position of the gasket. |
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