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The taper valve is easy to wear during the working process of the taper valve filling pump. In view of the problem, using the Navier-Stokes equation,k-ε turbulence model and the erosion wear model of valve gap two-phase flow, based on computational fluid dynamics (CFD) software, a total of 13 groups of valve gap flow field calculation models with different taper angles from 30°to 90°were established. The valve gap flow field velocity and erosion wear characteristics of taper valve with different taper angles were studied. The effects of slurry mass fraction, particle size and taper angle on the wear of taper valve gap were analyzed. The results show that the maximum flow velocity of the taper valve gap flow field is 8.28 m/s, which appears near the bottom angle of the taper valve and the valve gap. The maximum flow velocity of the taper valve flow field decreases with the increase of the taper angle. When the taper angle increases from 30° to 90°, the maximum flow velocity decreases from 28.698 m/s to 6.766 m/s, with a decreasing rate of 76.42%. The wear of the taper valve by the tailings particles mainly occurs at the edge of the end face of the taper valve disc. The erosion wear area is discretely distributed at the edge of the valve disc, and the maximum erosion rate is 9.4×10－4 kg/(m2·s). The erosion wear is concentrated at the edge of the end face of the valve disc, and the maximum erosion rate is 1.83×103 kg/(m2·s). The maximum erosion wear rate is negatively correlated with slurry mass fraction, particle size and taper valve angle. The maximum abrasion wear rate is positively correlated with the slurry mass fraction and particle size, and negatively correlated with the taper angle. The industrial verification shows that the selection of 60° as the design angle of the taper valve can effectively increase the service life of the taper valve and improve the stability of the taper valve filling pump.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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