Full
Outline
In order to improve the sealing performance of the triple eccentric all-metal butterfly valve with an integral valve seat structure, the sealing ring single-layer unit of the triple eccentric all-metal butterfly valve was analyzed through a discretization method based on the sealing surface indentation and deformation of the triple eccentric butterfly valve with different structural forms. The stress and deformation were analyzed and calculated, and the sealing structure was improved and verified experimentally. The results showed that when the triple offset butterfly valve was closed, the magnitude and direction of the force acting on each cross-sectional unit of the sealing ring along the flow channel direction were different. At the large end face position, the maximum closing stress acting on the sealing ring cross-sectional unit was 9.145 MPa, and the direction was downward. At the small end face position, the maximum closing stress was 6.482 MPa, and the direction was upward; The optimized metal multi-layer sealing ring has increased the deformation of the sealing ring by 15.4%~27.7% when subjected to the same torque, which is more conducive to forming a sealing zone between the sealing surface of the valve seat and the sealing ring; In addition, by utilizing a specially designed sealing ring structure and assembly process, the metal multi-layer sealing ring can be automatically adjusted, further improving the sealing performance. This enables the triple offset all metal butterfly valve to have both good sealing performance and a long service life. The research can provide reference for the design of high-performance triple eccentric all metal butterfly valves.
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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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