Gas cylinder surface sealing device with cantilever support and spiral chute

Abstract

The invention discloses a gas cylinder surface sealing device with a cantilever support and a spiral chute. The device comprises a sealing retainer, a rotor journal, a floating sealing ring and a cantilever supporting plate, wherein a dynamic pressure cylindrical sealing area is formed between the cylindrical sealing interface of the floating sealing ring and the cylindrical surface of the rotor journal, a high-pressure area and a low-pressure area are respectively arranged on two sides of the floating sealing ring, and the rotor journal and the floating sealing ring rotate relatively; and the floating sealing ring is supported by a plurality of cantilever sheets which are distributed circumferentially, and the cantilever sheets are fixed by the sealing retainer. The cylindrical surface gas film sealing device realizes non-contact and small-leakage sealing while adapting to the deformation in position sealing work process through the flexibility of the support and a dynamic pressure gas film, and is adaptive to the installation space requirement on non-shaft end position sealing through the cylindrical surface structure.

Description

technical field [0001] The invention belongs to the technical field of rotary shaft sealing, and in particular relates to a spiral groove gas cylinder sealing device with a cantilever support structure, which can be used in various forms of high-speed rotating machines such as compressors, expanders, and pumps. on the axis of rotation (i.e. the rotor journal). Background technique [0002] Known high-speed fluid machinery has special working conditions at multiple sealing positions, and the contact seal is difficult to adapt to high sliding speed and high ambient temperature conditions, and there are still some deficiencies in the fluid dynamic and static, pressure-combined end face gas sealing device. For example, due to the change of the working state of the rotor system, when the seal position is deformed, the adaptability is not enough, and local contact occurs, resulting in increased leakage or contact wear, resulting in unstable sealing performance; constrained by the ...

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Problems solved by technology

[0004] In order to overcome the deformation of the sealing position due to the change of the working state of the system during the working process of the high-speed rotor system, which will cause the contact wear of the sealing ring, the decrease of the working stability of the system or the excessive leakage, and at the same time adapt to the space of the non-shaft end sealing position along the high-speed rotor Structural requirements, the present invention provides a cylindrical air film sealing device with a cantilever support and a spiral groove, through which the flexible and dynamic pressure air film of the support can realize non-contact and small leakage sealing while adapting to the deformation of the sealing position during the working process, At the same time, the cylindrical structure is used to meet the installation space requirements of non-shaft end seals

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