MECHANICAL SEAL Russian patent published in 2019 - IPC F16J15/26 

FIELD: sealing equipment.

SUBSTANCE: invention relates to a sealing technique, in particular to mechanical seals intended for installation on hydraulic and pneumatic machines and devices, the working bodies of which perform a rotational and/or reciprocating motion. Mechanical seal of the shaft or plunger, or of the rod, or of the cylinder of the machine contains sealing rings and disks installed between the two supports in an alternating casing, which are ground to each other at the ends and pressed to the surfaces being compressed by a cylindrical spring. On external or internal surface of holder there are mating rings arranged eccentric relative to axis of sealing surface mounting necks or eccentric borings, and the sealing rings are made with concentric cylindrical surfaces and are located on the mentioned necks or in the bores. Diameter of the seating surface of the disks on the holder is greater or less than the diameter of the neck or boring by the amount of double eccentricity, and the height is greater than the height of the rings. On the side surface of the cartridge and in the lower part of the end surface of the rings there are recesses with the same angular shift relative to each other, in the form of a segment of the annular groove and a segment-circular bore, respectively, with formation of a blind annular groove. In the groove there is a cylindrical spring with the possibility of interaction of the spring ends with ends of the annular groove and segment-circular bore. Recesses are made in upper part of end surface of rings. Note here that said annular groove has its height doubled.

EFFECT: invention simplifies design and extends functionality by increasing spring deformation.

5 cl, 7 dwg