All-closed nuclear drum vacuum valve main shaft sealing structure
A fully-enclosed, spindle-sealing technology, which is applied to engine seals, engine components, mechanical equipment, etc., can solve problems that cannot meet the needs of large-diameter drum seals, and achieve the effect of safe and reliable sealing structure and optimized design
Inactive Publication Date: 2017-12-08
中核第七研究设计院有限公司
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Abstract
The invention belongs to the technical field of nuclear vacuum valves, and in particular relates to a fully-enclosed main shaft sealing structure of nuclear rotary drum vacuum valves. The lower sealing ring is fixed between the pressure plate and the assembly cover; the sealing ring is fixed between the shell and the assembly cover; the main shaft is pressed on the lower sealing ring; the diaphragm is welded between the connecting shell and the support; the upper sealing ring is installed on the support Between the seat and the main shaft; the lip seal ring is installed between the sleeve and the main shaft; the matching disc spring group is pressed above the sleeve; the nut is installed above the matching disc spring group; one end of the rubber bowl is fixed on the main shaft through a clamp The other end is fixed on the housing by a large nut. The invention adopts five sealing structures, which fully guarantee the sealing of the main shaft part of the valve. At the same time, the rubber bowl is used to transform the dynamic sealing into static sealing, the design is optimized, and the sealing structure is safe and reliable.
Application Domain
Engine seals
Technology Topic
EngineeringMechanical engineering
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