MAGNETIC VIBRATION ABSORBER (VERSIONS) Russian patent published in 2019 - IPC F16F6/00 E21B17/07 

FIELD: machine building.

SUBSTANCE: magnetic vibration absorber contains upper and lower sections of cylindrical hollow body. Upper and lower magnets are installed coaxially in the housing along the axis of oscillations and are placed with opposite poles to each other. One of magnets is installed with possibility of limited axial movement. Upper section of the body is made with an internal projection and an external flange. Section is installed with possibility of reciprocal displacement together with upper magnet along guide rods of lower section of housing. Rod on one side is fixed in groove, and on other side – with possibility of reciprocating motion is installed in opposite groove at depth h. Shell is equipped with an annular bottom protrusion having a through central hole. Ledge adjoins outer wall of lower section of housing, on which there is a transverse projection. Projection limits vibratory displacement of upper section of housing by engagement of annular bottom protrusion of sleeve at its displacement behind transverse projection of lower section of housing with provision of distance of restriction less than or equal to value of h. On lower part transverse ledge there is lower magnet. Tuning sleeve is equipped with external transverse projection. Ledge has upper plane located above lower magnet, which coincides with plane of upper end of cylindrical barrel to provide guaranteed air gap between upper and lower magnets at installation of movable upper magnet on this plane. According to the second version, the invention differs by the presence of one, and by the third version, several intermediate movable permanent magnets and spacers for their attachment.

EFFECT: more efficient operation of magnetic vibration damper of drilling equipment.

31 cl, 6 dwg