A seal assembly is for sealing about a shaft rotatable about a central axis and includes a generally annular seal disposeable about the shaft. The seal has a first axial end exposable to a higher pressure fluid, an opposing second axial end exposable to a lower pressure fluid, an outer circumferential surface exposable to the higher pressure fluid and an inner circumferential sealing surface. The inner sealing surface extends about the shaft to define an annular clearance space between the shaft outer surface and the seal inner surface, which provides a flow path between the seal axial ends. The seal is configured such that a differential of at least a predetermined magnitude between fluid pressure on the seal outer surface and fluid pressure on the seal inner surface deflects at least the seal second axial end radially inwardly to reduce the volume of the clearance space.

An assembly is provided for rotational equipment. This assembly includes a metal seal carrier and a carbon seal element. The metal seal carrier includes a receptacle and a cylindrical carrier surface forming an outer peripheral boundary of the receptacle. The carbon seal element is seated in the receptacle. The carbon seal element includes a cylindrical element surface that is brazed to the cylindrical carrier surface.

Technologies are described herein for a seal assembly for an engine, the seal having a circular carbon graphite mating surface and a circular carrier mating surface. A planar face of the circular carrier mating surface includes a circular bevel, which may be configured to receive a removable ringed insert. When inserted into the circular bevel, the ringed insert mates with a planar face of the circular carbon graphite mating surface. The carbon graphite mating surface, the circular carrier mating surface, and the circular of the carrier mating surface are aligned to have a common central axis along an engine shaft.

An improved face seal may comprise a seal housing having an annular extrusion, and a primary seal coupled to the seal housing. The primary seal comprises a sealing face and a base opposite the sealing face, wherein the primary seal has an annular structure coaxial with the annular extrusion with the base proximate a first end of the seal housing. The sealing face comprises a disrupted surface.

In an embodiment, a mechanical seal includes: a bellows 10 sealing between a rotating-side seal ring 5 biased in the axial direction, and an outer periphery face of a rotational shaft 2; a case 11 fitted to the ring 5 and the outer periphery of the bellows 10; and a drive ring 12 tightening the bellows 10 to the shaft 2, wherein cutout grooves 5b running through in the axial direction are provided on the outer periphery area of the ring 5; detent cutout areas 5d are provided on the side face of the ring 5 on a sealing face S side in a manner extending in the circumferential direction from the cutout grooves 5b; and detent convex areas 11e are provided at the edge area of the case 11 on the ring 5 side in a manner facing the cutout grooves 5b and bulging in the inner-diameter direction.

A mechanical seal assembly having a gland assembly, a rotary seal ring, a stationary seal ring, a sleeve assembly having a flange portion for mounting the rotary seal ring, a cover sealing element for seating over the flange portion and contacting a portion of the rotary seal ring, and an energizer sealing element axially spaced from the cover sealing element for sealing a portion of the stationary seal ring and the gland assembly and for providing an axial biasing force to the stationary seal ring.

A mechanical seal assembly adapted for arrangement around a rotating shaft of a rotating device and has first and a second seal rings. The assembly also includes an annular carrier having a base and a removable end portion configured to be affixed to a housing of the rotating device. The assembly also includes an annular flexible sealing membrane. The membrane includes an outer portion arrangeable between the first seal ring and a biasing mechanism and that is axially shiftable relative to the rotating shaft. The membrane also includes an inner portion surrounded by the outer portion and positioned between the base and the removable end portion of the annular carrier and the base and a removable end portions hold the inner portion in fixed relative to the annular carrier as the outer portion shifts relative to the rotating shaft.

A mechanical seal assembly adapted for arrangement around a rotating shaft of a rotating device and has first and a second seal rings. The assembly also includes an annular carrier having a base and a removable end portion configured to be affixed to a housing of the rotating device. The assembly also includes an annular flexible sealing membrane. The membrane includes an outer portion arrangeable between the first seal ring and a biasing mechanism and that is axially shiftable relative to the rotating shaft. The membrane also includes an inner portion surrounded by the outer portion and positioned between the base and the removable end portion of the annular carrier and the base and a removable end portions hold the inner portion in fixed relative to the annular carrier as the outer portion shifts relative to the rotating shaft.

The invention relates to a mechanical seal assembly comprising a mechanical seal (2) with a rotating slide ring (3) and a stationary slide ring (4) defining a seal gap (5) therebetween, a pretensioning device (6) which biases the stationary slide ring (4) in the axial direction (X-X) of the slide ring seal arrangement, a support ring (7) which is arranged on the stationary slide ring (4), the support ring (7) being axially movable relative to the stationary slide ring (4) the pretensioning device (6) being arranged between the support ring (7) and the stationary slide ring, a fixing device (8) which is arranged for axially movable fixing the support ring (7) to a stationary component, a stop (9) which limits a distance (W1) by which the axially movable support ring (7) can be moved, and a secondary seal (10) which is arranged to seal between the support ring (7) and the stationary component.

A face seal assembly includes a pair of identical metal and elastomeric rings. The metal rings are biased towards one another by the elastomeric rings when the face seal assembly is installed. The metal rings each have lapped surfaces that abut one another to create a sealing arrangement. An outside side of each elastomer ring is divided by a second inner diameter surface definingly separating a metal ring engagement side from an environmentally exposed side. The environmentally exposed side of each elastomeric ring has an annularly-shaped concave valley formed in the elastomeric ring, which is facing the concave valley of its oppositely disposed respective elastomeric ring. The concave valley starts from a first annular lip and extends to a maximum offset distance at an annular bottom of the concave valley and ends at a second annular lip. The second annular lip is disposed further back from the first annular lip.