MECHANICAL SEAL Russian patent published in 2019 - IPC F16J15/16 

FIELD: machine building.

SUBSTANCE: invention relates to the field of mechanical engineering, mainly to the field of oil engineering. Mechanical seal comprises a body enclosing a sealing rod and forming a cylindrical chamber in conjunction with a perforated cylindrical cage housed therein, in which a cylindrical sleeve of an elastic material is installed, inside of which there is located at least a pair of sealing rings with an internal diameter, equal to the diameter of the sealing stem, pressed and ground in the axial direction to each other and cut into several segments, wherein the segments of one ring are turned to segments of the adjacent ring so that the joints of the segments of one ring completely overlap with segments of the adjacent ring. Perforation in the cage is designed in such a way as to provide a hydrodynamic connection between the surface of the cylindrical chamber and the outer surface of the sleeve of the elastic material, one of the ends of which is structurally designed so as to seal, in combination with the end of the cylindrical chamber, the low pressure zone from the zone located between the surface of the cylindrical chamber and the outer surface of the elastic material sleeve, and the other end of the sleeve of the elastic material in combination with the other end of the cylindrical chamber provides a hydrodynamic connection between the high pressure zone and a zone between the surface of the cylindrical chamber and the outer surface of the sleeve of the elastic material.

EFFECT: invention simplifies the design and improves the sealing and sealing reliability.

1 cl, 1 dwg