Sealing bush unit for sealing reciprocating machine parts
OwnerErich Brokeninventor
Life of this patent
Estimating the term…
Abstract
A sealing bush unit for sealing a reciprocating machine part has an annular bush with an inner diameter exceeding an outer diameter of the reciprocating pump to form a radial gap therebetween, a radially outer surface arranged so that a working pressure acts upon the same and the bush radially displaces towards the reciprocating part, one flat end face facing toward a suction zone and providing an abutment for the sealing bush, and another end face facing toward a pressure zone, wherein a pressing ring is arranged adjacent to the other end face of the bush with axial play relative to a machine housing.
Claims15
A sealing bush unit for sealing a reciprocating machine part, particularly a plunger of a fluid-displacing pump having a pump housing with suction and pressure sides, the sealing bush unit comprising an annular bush having an axis, a radially inner surface with an inner diameter exceeding an outer diameter of a plunger so as to form a radial gap therebetween, a radially outer surface arranged so that a working pressure acts upon said radially outer surface over a part of its axial length and thereby said bush radially displaces toward the plunger, and two end faces of which one end face faces toward a suction zone and the other end face faces toward a pressure zone, said one end face being flat and extending normal to said axis of said bush to provide axial abutment of the latter;
- and a pressing ring arranged adjacent to the other end face of said bush with an axial play relative to the pump housing.
A machine, particularly a fluid-displacing pump, comprising
- a pump housing with suction and pressure zones;
- a plunger reciprocating in said pump housing and having a predetermined outer diameter;
- an annular sealing bush having an axis, a radially inner surface with an inner diameter exceeding the outer diameter of a plunger so as to form a radial gap therebetween, a radially outer surface arranged so that a working pressure acts upon said radially outer surface over a part of its axial length and thereby said bush radially displaces toward said plunger, and two end faces of which one end face faces toward a suction zone and the other end face faces toward a pressure zone, said one end face being flat and extending normal to said axis of said bush to provide axial abutment of the latter;
- and
- a pressing ring arranged adjacent to the other end face of said bush with an axial play relative to said pump housing.
Dependencies are inferred from the claim text.