Patent ID: 7905494
Filing Date: 2011-03-15
Classification: F16J

Abstract:
1. A mechanical seal assembly having a mechanical seal device and a seal housing that includes a step shouldered bore comprised of a fit engagement circumferential surface disposed in a bore hole of the seal housing receiving a rotary shaft therethrough, and a support surface perpendicular relative to said fit engagement circumferential surface, said mechanical seal device comprising: an annular packing made of a resilient material and having a contact surface, an adhesion surface and an insertion nose end portion, said contact surface securely engaging said fit engagement circumferential surface, said adhesion surface being disposed at an inner circumferential side in relation to said contact surface, said insertion nose end portion located at a frontal tip in a direction of insertion against said fit engagement circumferential surface; a cylindrical reinforcement annulus immersed at a radially inbetween location within said packing; and a stationary seal ring having a secure engagement surface, a back surface, and a seal surface, said secure engagement surface coupled with said adhesion surface of said packing, said back surface forming a seal-tight contact with said support surface, and said seal surface being disposed opposite said back surface, wherein a thickness of a first elastic layer located at an inner circumferential side of said reinforcement annulus immersed in said packing is greater than a thickness of a second elastic layer located at an outer circumferential side of said reinforcement annulus, said insertion nose end portion of said packing is slanted toward an opposing surface of the seal housing relative to an insertion nose end surface of said reinforcement annulus and said back surface abuts said support surface, a cavity portion (C) is defined radially between said insertion nose end portion and the opposing surface, and said back surface is in a seal-tight relation to said support surface by means of an elastic force of said packing.