Mechanical seal device
AssigneeS.P.M. Drink Systems S.P.A.
InventorEnrico GRAMPASSI
Life of this patent
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Abstract
The mechanical seal device comprises a rotating unit (11) and a stationary unit (12) respectively comprising a ring of ceramic material (13, 15) associated with the bottom of a support element (14, 16) of polymeric material shaping a respective sealing face. The rotating unit (11) and the stationary unit (12) are suitable to be coaxially mounted on a shaft (8) of a rotating member (3), in specular position, so that said rings (13, 15) of ceramic material have said seal faces in mutual contact on a plane substantially perpendicular to the axis of the shaft (8).
Claims11
Mechanical seal device in combination with an apparatus for preparing and dispensing fluid or creamy food products, comprising
- a tank (2) of containment of the product to be dispensed;
- a mixing device (3) arranged inside said tank (2) and provided with a shaft (8) predisposed to be brought in rotation according to an axis longitudinal to said tank (2) for causing the circulation of said product inside said tank (2);
- means for the heat-treatment of the product contained inside said tank (2);
- a dispensing device (23) of said product frontally associated with said tank (2);
- characterized in that said mechanical seal device (10) comprises
- a rotating unit (11) comprising a first seal ring (13) associated with the bottom of a first support element (14) of polymeric material being cup-shaped and defining a first seal face;
- a stationary unit (12) comprising a second seal ring (15) associated with the bottom of a second support element (16) of polymeric material being cup-shaped and defining a second seal face;
- said rotating unit (11) and said stationary unit (12) being predisposed to be coaxially mounted on said shaft (8) of the mixing device (3), facing each other, so as to have said first and second seal ring (13, 15) arranged with said first and second seal face in mutual contact on a plane substantially perpendicular to said axis of the shaft (8) of the mixing device (3);
- said first and second cup-shaped support element (14, 16) being tightened in use respectively against an abutment surface (7) shaped by said mixing device (3) and against an opposite bottom wall (28) of said tank (2).
Device according to one of the preceding claims, characterized in that said first and second seal ring (13, 15) have axial cross-section with substantially polygonal shape, and a respective side of said polygonal profile shapes said first and second seal face.
Device according to one of the preceding claims, characterized in that said first and second seal rings (13, 15) are made of ceramic material.
Device according to one of the preceding claims, characterized in that said first and second cup-shaped support element (14, 16) are made of silicone.
Device according to one of the preceding claims, characterized in that said rotating unit (11) and said stationary unit (12) are made in identical manner and are mutually interchangeable.
Device according to one of the preceding claims, characterized in that said first and second seal ring (13, 15) are slightly protruding with respect to the bottom of said first and second support element (14, 16), in such a way that the respective seal face is external to the same support element.
Dependencies are inferred from the claim text.