US 4,169,603 AGranted

Shaft packing, in particular for use in colloid mill

AssigneeMeyer AG Zuchwil

InventorFriedrich Funk

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Abstract

The present invention refers to a shaft packing, in particular for use in colloid mill, with a sliding and a counter ring, one of the rings is made of a hard material having a Vickers hardness of at least 1,000 kp/mm2 and the other is made of a soft material having a hardness of 100 Shores at the most. In particular the surfaces in contact with each other are cooled and lubricated by a liquid. In order to further increase the life of said packing, the counter ring is displaceable and adjustable from the outside without being dismantled and the sliding ring holder is provided with centrifugal blades for keeping the material to be milled and milling bodies away from the contact surfaces of said rings. The construction of said shaft packings allows its use in a horizontally arranged colloid mill, wherein the material being milled flows in the direction of the widening cone.

Claims20

Dependent claims

A shaft packing for a shaft that extends into a vessel of a mill, such as an agitating mill and a colloidal mill, the shaft and vessel being mounted for rotation relative to each other, said shaft packing comprising

a shaft packing housing;
a sliding ring;
a counter ring mounted in sealing engagement with said sliding ring;
wherein one of the said sliding and said counter rings is mounted on the shaft and the other is fixed with respect to the vessel, and one is made of a hard material having a Vickers hardness of at least 1000 kp/mm.sup.2 and the other is made of a soft material having a maximum hardness of 100 Shores;
and
further comprising means for displaceably and adjustably mounting said counter ring, said mounting means being in turn mounted on said housing such that said counter ring can be displaced and adjusted from outside the vessel without having to dismantle the shaft packing;
means for applying spring pressure to press said counter ring against said sliding ring;
means for supplying a cooling and lubricating liquid to said sliding and counter rings at the surfaces thereof in contact with each other;
and
a sliding ring holder having at least one end face for mounting said sliding ring, said holder having protecting means mounted thereon for keeping the material to be milled and the milling bodies, if used in the mill, away from the contacting surfaces of said sliding and counter rings.

7 more elements

A shaft packing for a shaft that extends into a vessel, the shaft and vessel being mounted for rotation relative to each other and the shaft packing being especially for use in a mill such as an agitating mill and a colloidal mill, said shaft packing comprising

an annular sliding ring surrounding the shaft;
first means for rigidly mounting said sliding ring to the shaft;
a shaft packing housing surrounding the shaft and rigidly attached to the vessel;
an annular counter ring surrounding the shaft;
and
second means for mounting said counter ring in coaxial end to end sealing engagement with said sliding ring and for mounting said counter ring to said housing, said second mounting means comprising an annular spring guide surrounding the shaft and in abutting engagement at one side thereof with the other end of the counter seal that is distal from the one end engaging said sliding ring;
wherein said housing is comprised of a forward annular portion the inside of which is in sealing engagement with the outside of said counter ring proximal to said one end of said counter ring, and a rearward portion integral with said forward portion and having openings in the periphery thereof so as to provide access to said spring guide and said counter ring;
said shaft packing further comprising means for removably, rigidly attaching said housing to the vessel;
and a spring means acting on said spring guide for urging said sliding seal and said counter seal into sealing engagement, said spring means comprising an elongated compression spring which surrounds the shaft and which at one end thereof engages said spring guide at the other end thereof, a spring locking ring engaging the other end of said spring, and means for removably, rigidly attaching said spring locking ring to said housing;
and
wherein one of said sliding ring and said counter ring has an axial length at least twice as long as the other and extends along said shaft outside of said vessel so that it is accessible from outside of said vessel.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 05/804,349Filed 7 Jun 1977
Priority: CH 7237/769 Jun 1976
Granted: 2 Oct 1979
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

F16J 15/3404
With slip-ring pressed against a more or less radial face on one member: and characterised by parts or details relating to lubrication, cooling or…
B02C 17/16
Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special…: mills in…
B01F 2035/3513
Sealings: comprising a stationary member in frontal contact with a movable member
Y10S 277/93
Seal for a joint or juncture: seal including heating or cooling feature