FIELD: machine building.
SUBSTANCE: in hydrodynamic packing dynamic packing edge is required for compressed packing contact with surface rotational relative to it and for pinning up film of lubricating fluid into joint between dynamic edge and rotating surface at relative rotation both in clockwise and counter clockwise directions. A rise with an elongated recess facilitates gradual taper, effective angle of collision and gradual pressure rise in a contact zone, which ensures efficient hydro-dynamic wedging. Due to end effects of contraction tapered zones of contact with raised pressure provide controlled displacement of lubricating material inside a moving packed joint between packing and surface rotating relative to it.
EFFECT: improved lubrication and decreased value of torque required for overcoming packing friction.
47 cl, 37 dwg
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