Mechanical seal unit, particularly for a fire extinguishing pump

摘要

The present invention refers to a premounted mechanical seal unit, particularly for a fire extinguishing pump, with a rotating seal ring a stationary seal ring, the rotating seal ring and the stationary seal ring defining a seal gap thereinbetween, an inner sleeve which is connected to the rotating seal ring, an outer sleeve which is connected to the stationary seal ring, and a securing element which secures the outer sleeve to the inner sleeve. The inner sleeve and the outer sleeve in axial direction each have a length greater than a sum of the axial lengths of the rotating seal ring. The inner sleeve has a first form closure device on a first axial end and a second form closure device on a second axial end.

主权项

1. A pump, comprising:
a premounted mechanical seal unit, a pump impeller, and a drive shaft, the mechanical seal unit including:
a rotating seal ring;a stationary seal ring, the rotating seal ring and the stationary seal ring defining a seal gap thereinbetween;an inner sleeve which is connected to the rotating seal ring;an outer sleeve which is connected to the stationary seal ring; anda securing element which secures the outer sleeve to the inner sleeve,wherein the inner sleeve and the outer sleeve in axial direction each have a length greater than a sum of the axial lengths of the stationary and rotating seal rings; andwherein the inner sleeve comprises a first form closure device on a first axial end and a second form closure device on a second axial end,wherein the first form closure device is disposed between the inner sleeve of the mechanical seal unit and the pump impeller,wherein the second form closure device is disposed between the inner sleeve of the mechanical seal unit and the drive shaft.