Dynamic seal device

Abstract

The invention relates to a dynamic seal device, which is installed between a rotating shaft and a box body, and is sleeved on the rotating shaft. The dynamic seal device comprises a ring-shaped base body, and a seal ring group which is located in the base body, wherein the seal ring group comprises an inner seal ring and an outer ring which are radially arranged along the rotating shaft. At least one slit is respectively opened on the inner seal ring and the outer seal ring, and the positions of the slits on the inner seal ring and the outer seal ring are mutually staggered. When the dynamic seal device with the structure is in working state, the axial motion and the radial motion can be kept, and the invention can freely float together with the rotating shaft. Therefore, the dynamic seal device of the invention has higher service life, and excellent seal property, which can meet the sealing needs of high temperature and high pressure.

Description

【Technical field】 [0001] The invention relates to a sealing device, in particular to a dynamic sealing device applied to the cooperation of a rotating shaft and a box body in a rotary transmission system. 【Background technique】 [0002] The sealing ring is the most commonly used sealing part in the rotary transmission device. At present, the dynamic sealing devices used in the rotary transmission device usually include felt seals, oil seals, and expansion ring seals. Among them, felt seals and oil seals cannot withstand high-pressure working environments due to their low material hardness, and expansion ring seals require slots on the shaft, so the gap between the inner diameter of the expansion ring and the shaft cannot withstand high speeds , It is also not suitable for environments with high medium pressure. [0003] For the sealing between the high-speed rotating input / output shaft and the box, not only the sealing ring is required to be able to seal effectively, but al...

AI Technical Summary

Problems solved by technology

Among them, felt seals and oil seals cannot withstand high-pressure working environments due to their low material hardness, and expansion ring seals require slots on the shaft, so the gap between the inner diameter of the expansion ring and the shaft cannot withstand high speeds , nor suitable for environments with high medium pressure

[0003] For the sealing between the high-speed rotating input / output shaft and the box, not only the sealing ring is required to be able to seal effectively, but also the sealing ring is required to maintain a sufficient life, which puts forward higher requirements for the sealing device. However, the above-mentioned various sealing The method has shortcomings such as short service life and inability to meet the occasions with high requirements for dynamic sealing.

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