Full
Outline
To address the problem of minor leakage and accumulation of powdered media in the labyrinth seal of the new dynamic shaft seal device for a plow blade mixer，the working principle of the seal device was analyzed.A centrifugal sealing enhancement technology and design method based on floating blocks in spiral grooves was proposed，and optimization of the number of floating blocks and material selection was studied.Through simulation analysis and experimental verification of the centrifugal sealing enhancement structure with floating blocks，the results show that as the number of floating blocks increases，the leakage of powder particles decreases significantly；when the number of floating blocks increases from 2 to 4，the leakage rate decreases the fastest；when the number of floating blocks is 12，the leakage of powder particles decreases to 75 particles，indicating that the leakage situation has been significantly improved；when the number of floating blocks is designed to be 6，the leakage of powder media in other seals such as the labyrinth seal is 1.25 g，meeting the test requirements，and the leakage is about one‑third of that of the centrifugal seal structure without floating blocks，significantly improving the sealing performance of the dynamic shaft seal device and extending the service life of the seals.Since the floating blocks are in a floating state during operation，they can automatically compensate for the increased clearance due to wear，thereby ensuring continuous sealing effect.The research has certain guiding significance for improving the dynamic shaft sealing performance of plow blade mixers and other types of powder machinery equipment.
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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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