Magnetic hydrogen gas sealing device for high-pressure floating oil ring

Abstract

The invention discloses a magnetic hydrogen gas sealing device for a high-pressure floating oil ring. A horizontal oil supply hole and a perpendicular oil supply hole are drilled in an upper seat ring; upper and lower oil supply rings are formed in the side surfaces of upper and lower seat rings, and communicate with each other; upper and lower sealing oil ring cavities communicate with upper and lower oil supply rings through upper and lower oil supply holes; a plurality of upper and lower oil passing holes are formed along the outer diameters of upper and lower oil passing ring cavities; a plurality of upper and lower inner magnetic columns and a plurality of upper and lower outer magnetic columns are uniformly embedded into inner-diameter peripheries of the upper and lower inner sealing tooth rings and upper and lower outer sealing tooth rings; an oil discharge tube is arranged on the lower seat ring; and upper and lower cover plates, and upper and lower floating sealing rings define an oil return upper cavity and an oil return lower cavity inside upper and lower seat rings. According to the technical scheme adopted by the invention, the magnetic hydrogen gas sealing device is widely applied to hydrogen gas sealing of the field of hydrogen-cooling power generators and gas sealing of other fields.

Description

Technical field: [0001] The invention is mainly used as a device for sealing the hydrogen inside the sealing end cover of a hydrogen-cooled turbogenerator. Background technique: [0002] At present, hydrogen-cooled turbogenerators use floating rings and fixed sparse-tooth seals for hydrogen sealing, and combine dynamic adjustment of hydrogen pressure and sealing oil pressure to seal the dynamic and static parts of hydrogen used for cooling inside the generator, that is, the sealing end The seal between the inner diameter of the cover and the outer diameter of the main shaft. This method of sealing has the following problems: [0003] 1. Because the floating seal shoe and the sparse tooth are made of metal, there must be a certain amount of clearance between the main shaft and the main shaft to prevent the shaft from grinding, which will cause the high-pressure sealing oil to flow from the gap to the hydrogen area; [0004] 2. The oil pressure in the high-pressure sealing o...

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Problems solved by technology

[0005] 3. During the start-up process, the hydrogen pressure is not established and the pressure of the sealed high-pressure oil is too large, causing a large amount of high-pressure sealed oil to be sprayed into the hydrogen area and enter the generator, resulting in too much oil in the generator, which affects the safety and security of the generator. The service life brings hidden danger;

[0006] 4. When the generator is running normally, the oil pressure is about 84kpa higher than the hydrogen pressure, causing the high-pressure sealing oil to enter the generator through multiple sparse tooth retaining rings

Therefore, hydrogen-cooled generators basically have a certain amount of sealing oil in the hydrogen area and inside the generator, which makes the operating cost of the generator very high. What's more, these sealing oils will destroy the insulation strength of the generator and cause major accidents. Hidden dangers are buried, so manufacturers and operators of hydrogen-cooled turbogenerators urgently need to solve this technical problem

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