Abstract The invention relates to a grinding apparatus for vegetable material which is disintegrated in an interspace between the opposed grinding surfaces of two grinding discs mounted rotatably in relation to one another within a stationary frame. At least one of the grinding discs is carried by a rotatable shaft which in turn is surrounded concentrically by a screw conveyor for the material to be disintegrated in the grinding interspace, which conveyor is driven at a substantially lower rotational speed than the shaft carrying the grinding disc. Disposed between said shaft and the conveyor and between the latter and the stationary frame are stuffing boxes intended to prevent steam from seeping out of the apparatus and particles of grinding produce from penetrating into the space between the shaft and the screw conveyor. These stuffing boxes are supplied with cooling water under pressure from a common source in such a manner that the cooling water first passes through the stuffing box between the frame and the conveyor screw and therefrom to the stuffing box between the conveyor screw and the rotatable shaft.
In a grinding apparatus, for vegetable materials, of the type comprising two grinding discs mounted rotatably in relation to one another within a stationary frame, at least one of said grinding discs being carried by a rotatable shaft surrounded concentrically and freely by a screw conveyor for feeding material to be ground from an inlet opening in the frame to the grinding surfaces of the discs, and driven at a lesser number of revolutions per minute than said shaft; the improvement which comprises a stuffing box disposed between the shaft and the conveyor laterally of the inlet opening, said stuffing box being supplied with water under pressure through channels formed in the conveyor which channels in turn communicate with a stationary feeding channel from an external pressure water source over a second stuffing box located between said frame and said conveyor screw.
Claim 2
Dependent Claim
142 words
In a grinding apparatus, for vegetable materials, of the type comprising two grinding discs mounted rotatably in relation to one another within a stationary frame, at least one of said grinding discs being carried by a rotatable shaft surrounded concentrically and freely by a screw conveyor for feeding material to be ground from an inlet opening in the frame to the grinding surfaces of the discs, and driven at a lesser number of revolutions per minute than said shaft; the improvement which comprises a stuffing box disposed between the shaft and the conveyor laterally of the inlet opening, said stuffing box being supplied with water under pressure through channels formed in the conveyor which channels in turn communicate with a stationary feeding channel from an external pressure water source over a second stuffing box located between said frame and said conveyor screw.
Claim 3
Dependent Claim
25 words
In the apparatus as claimed in claim 1, in which the first-mentioned stuffing box is disposed outside the second-mentioned stuffing box viewed in axial direction.
Claim 4
Dependent Claim
24 words
In an apparatus as claimed in claim 2, in which the first-mentioned stuffing box is disposed radially inside bearings for supporting the screw conveyor.