Full
Outline
In response to the problems of pipeline vibration and noise caused by long-distance and large-height-difference transportation of filling industrial pumps, the relationship among pressure drop, pipe diameter, and flow velocity during slurry transportation was studied through filling slurry loop pipeline transportation tests. Based on tests data, a load model for filling industrial pumps and pipeline transportation was established in AMEsim, and the mechanism of the pre-pressure buffer device was studied on this basis. The research results indicate that the resistance loss along the pipeline is positively correlated with flow velocity and negatively correlated with pipe diameter. As the length of the pipeline increases, the peak pressure at the outlet of the pipeline increases linearly, but the rate of change in pressure pulsation decreases. The peak pressure at the outlet of the pipeline is approximately inversely proportional to the square of the pipe diameter. The pre-pressure buffer tank can significantly reduce the pressure pulsation of the filling pipeline. When the ratio of the pre-pressure buffer tank volume to the conveying cylinder volume is 0.45 to 0.55, the vibration reduction effect and economy are both good. The industrial test results on the vibration reduction of the pre-pressure buffer tank show that adding a 60 L pre-pressure buffer tank at the outlet of an 80 m3/h filling pump reduced pressure pulsation to 60% of its original level and reduced pipeline vibration noise by 14 dB, achieving good vibration reduction and noise reduction effects.
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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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