DEVICE FOR PROTECTION OF SEALING RINGS Russian patent published in 2017 - IPC F16J9/00 

FIELD: machine engineering.

SUBSTANCE: device for the protection of sealing rings contains sealing and protective rings installed in the stem groove. In the additional stem groove made at a distance not less than the diameter of the radial cylinder bypass port from the stem groove on the side opposite to the direction of liquid flow, a protective C-type washer interacting with the inner surface of the cylinder with its outer end surface and a pressing ring are located. There is a gap equal to half the gap between the stem and the cylinder between the inner end surface of the protective C-type washer and the base of the additional groove. The lateral surface of the protective C-type washer contacting with the pressing ring is made conical.

EFFECT: invention allows to protect the sealing rings from possible tearing out of the grooves and destruction by the liquid flow as they pass through the radial bypass port in the coupled part - the cylinder or the stem and improve the sealing reliability of the cylinder-stem pair.

3 cl, 3 dwg