Mechanical face seals with special bellows
AssigneeCrane Packing Limited
InventorsGeoffrey Luxford, Grant A. Masom
Life of this patent
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Abstract
A mechanical face seal adapted to withstand a pressure differential across its sealing faces, includes a bellows unit of monolithic construction, comprising a plurality of corrugations, the crowns of the convolutions directed towards the high pressure side of the seal being of greater radius of curvature than the crowns of the convolutions directed towards the low pressure side of the seal.
Claims13
A mechanical face seal for providing a seal between a pair of relatively rotatable machine components, and which in use are subjected to a pressure differential, comprising a first seal face member which is secured in fluid-tight manner to one of said components and has a sealing face, a second seal face member having a sealing face which is urged against the sealing face of the first seal face member, the second seal face member being secured to the other of said components by means of a flexible resilient formed bellows unit which serves to seal the second seal face member to said other component, said bellows unit having a plurality of convolutions, the crowns of the convolutions which are directed towards the high pressure side of the seal being of greater radius of curvature than the crowns of the convolutions directed towards the low pressure side of the seal.
Dependencies are inferred from the claim text.