Rotary sealing device controlled by wave spring

Abstract

The invention belongs to the technical field of hydraulic pressure, and discloses a rotary sealing device controlled by a wave spring, which comprises a shell and an internal channel, and the internal channel is arranged in the shell through a bearing and can rotate relative to the shell; a cavity for transporting a medium is formed in the middle of the internal channel and is communicated with the bearing; an elastic combined sealing structure is further arranged between the inner channel and the shell and arranged behind the bearing, and a medium in the cavity is kept sealed by the elastic combined sealing structure after passing through the bearing. Effective sealing of a non-stable transportation channel is achieved within the pressure range, efficient pressure relief is achieved outside the pressure range, the pressure relief efficiency is improved along with pressure rising, and the pressure relief device is suitable for various hydraulic media, high in reliability, good in durability, capable of bearing the large rotating speed and suitable for the high working pressure. And a plurality of elastic sealing structures can be reused, so that the pressure stability of an internal medium is ensured.

Description

technical field [0001] The invention belongs to the technical field of hydraulic pressure and relates to a rotary sealing device controlled by a wave spring. Background technique [0002] In the field of hydraulics, hydraulic media often need to be transported in an unstable transport channel, for example, when the transport channel rotates axially, it is still necessary to ensure a stable seal. [0003] Taking the rotary seal as an example, the traditional rotary seal solution is in the form of non-metallic rotary seals, such as O-shaped rubber seal rings, seal rings, grid rings, etc. Due to the characteristics of the material itself, this kind of non-metallic parts has limitations in terms of reliability, durability and storage of parts. Moreover, the traditional rotary sealing form cannot adjust the medium pressure in the transportation channel, and an additional relief valve is required to realize overpressure relief. [0004] Therefore, how to ensure that the internal...

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Problems solved by technology

Due to the characteristics of the material itself, this kind of non-metallic parts has limitations in terms of reliability, durability and storage of parts.

Moreover, the traditional rotary sealing form cannot adjust the medium pressure in the transportation channel, and an additional relief valve is required to realize overpressure relief

[0004] Therefore, how to ensure that the internal medium does not leak within a certain pressure range when the transportation channel needs to rotate, and at the same time, when the pressure exceeds a certain threshold, it can automatically release the pressure and keep the internal pressure within a stable range. This technical problem has no solution for the time being.

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