Outer step type seal ring with ring groove

Abstract

The invention discloses an outer stepped seal ring with an annular groove, which is arranged on a part which uses fluid as the working medium and has an annular groove. The other part is connected; the seal ring body is in contact with the other part, and there is a step on the outside of the seal ring body. It is the low-pressure side, and there is a flow channel for non-sealed fluid inside; the sealing end surface of the sealing ring body is provided with a ring groove, and the non-sealing side of the ring body is provided with a number of axial through holes, and the through holes communicate with the ring groove; the ring of the present invention The surface has through holes, which can introduce fluid medium, and can effectively reduce the temperature and temperature gradient of the ring body.

Description

technical field [0001] The invention relates to a dynamic sealing device for a rotary shaft of a fluid machine. Background technique [0002] For a long time, the development of dynamic seals for rotating shafts of fluid machinery in my country has been slower than other seals, and there is a big gap with foreign countries. At present, this kind of seal mainly has the following forms: flat ring, platform ring, L-shaped cross-section ring, ring with anti-rotation groove, T-shaped cross-section ring, rectangular groove ring, etc. As a component used to solve the dynamic sealing between the rotating shaft and the body, the sealing ring mainly relies on the elastic force generated by the elastic element and the medium pressure to achieve the sealing effect, and effectively prevents the medium from the high pressure end to the low pressure by fitting the sealed place side leaks. [0003] Limited by material properties, the working environment of the sealing ring cannot exceed i...

AI Technical Summary

Problems solved by technology

At present, the dynamic sealing ring for the rotating shaft of fluid machinery cannot effectively solve the problem even if the material with high temperature resistance and good thermal conductivity is selected.

Since the sealing ring will generate a large amount of frictional heat during use, the temperature of the ring body will continue to rise when there is no effective heat dissipation channel, resulting in a temperature gradient in the sealing ring, resulting in thermal deformation and thermal cracking of the end face

For poor lubricity and volatile media, problems such as liquid film vaporization are also prone to occur

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