A carbon seal assembly may comprise a seal support, a seal housing coupled to the seal support, and a carbon seal adjacent an aft portion of the seal housing. The carbon seal may comprise a nose defined by an axial surface of the carbon seal, a first radial surface of the carbon seal, and a second radial surface of the carbon seal radially inward of the first radial surface. The first radial surface and the second radial surface may extend forward from the axial surface. A first axial length of the first radial surface may be greater than a second axial length of the second radial surface.

The present invention provides a shaft-cylinder assembly for high-temperature operation comprising a pair of first and second dynamic sealing members having a helical coiled seal ring structure configured to be in contact with the shaft for providing dynamic sealing function in the cylinder; and a cylindrical cooling jacket configured to circumferentially surround the dynamic sealing members such that a cavity is defined between the dynamic sealing members inside the cooling jacket; wherein the cooling jacket comprises one or more inflow cooling channels and one or more outflow cooling channels configured to communicating with the cavity and circulating a cooling fluid through the cavity for moving heat away from the dynamic sealing members.

Seal arrangement (48) comprising a plug member (46) configured to seal a through opening (12) in a wall (10); a pressing section (74); and a cover member (70) configured to be connected to the plug member (46) and configured to force the pressing section (74) to press a sealing element (72), arranged laterally outside the plug member (46), towards the wall (10). A kit of parts and a method for sealing a through opening (12) in a wall (10) and for painting the wall (10) are also provided.

Seal arrangement (48) comprising a plug member (46) configured to seal a through opening (12) in a wall (10); a pressing section (74); and a cover member (70) configured to be connected to the plug member (46) and configured to force the pressing section (74) to press a sealing element (72), arranged laterally outside the plug member (46), towards the wall (10). A kit of parts and a method for sealing a through opening (12) in a wall (10) and for painting the wall (10) are also provided.

A sealing assembly that includes first, second and third sealing elements, where the first sealing element is disposed between the second and third sealing elements. The sealing elements are shaped in a complementary manner so that the sealing elements when assembled nest together. The sealing elements also have different hardness values associated therewith.

A rotary seal assembly includes a viscoelastically deformable support ring having a high-pressure side first support leg connected by a back portion to a low-pressure side second support leg. The legs laterally delimit an annular groove of the support ring open toward the sealing surface retaining a sealing ring. A rubber-elastically deformable pre-loading element between the seal retaining structure and the support ring pre-loads the sealing ring against the sealing surface via the support ring. A pressure activation of the pre-loading element by an operating pressure prevailing on the high-pressure side, the pre-loading element, which is supported on a support surface of one of the two machine parts, is deformed in the pre-loading direction proportionally to the operating pressure such that the support ring is moved toward the sealing surface with the low-pressure-side support leg thereof and is moved away from the sealing surface with the high-pressure-side support leg thereof.

A rotary seal assembly includes a viscoelastically deformable support ring having a high-pressure side first support leg connected by a back portion to a low-pressure side second support leg. The legs laterally delimit an annular groove of the support ring open toward the sealing surface retaining a sealing ring. A rubber-elastically deformable pre-loading element between the seal retaining structure and the support ring pre-loads the sealing ring against the sealing surface via the support ring. A pressure activation of the pre-loading element by an operating pressure prevailing on the high-pressure side, the pre-loading element, which is supported on a support surface of one of the two machine parts, is deformed in the pre-loading direction proportionally to the operating pressure such that the support ring is moved toward the sealing surface with the low-pressure-side support leg thereof and is moved away from the sealing surface with the high-pressure-side support leg thereof.

A metallic sealing assembly between a rotating shaft and a fixed frame comprises: a flexible metallic seal having two tori, inner and outer, that are concentric and of different average diameters, comprising a metal envelope which encases and holds the inner and outer tori; a shaft rotating about an axis of rotation, comprising an annular shoulder against which the seal comes to press; a counter-face, comprising a contact face against which the seal comes to press; a wedge block positioned around the rotating shaft such that the seal is held between the wedge block and the contact face, the wedge block mounted to slide on the rotating shaft; a metal part which forms a cap through which the rotating shaft passes and which is secured to the frame and/or to the counter-face, the rotating shaft being free to rotate with respect to the cap and axially secured to the cap.

A metallic sealing assembly between a rotating shaft and a fixed frame comprises: a flexible metallic seal having two tori, inner and outer, that are concentric and of different average diameters, comprising a metal envelope which encases and holds the inner and outer tori; a shaft rotating about an axis of rotation, comprising an annular shoulder against which the seal comes to press; a counter-face, comprising a contact face against which the seal comes to press; a wedge block positioned around the rotating shaft such that the seal is held between the wedge block and the contact face, the wedge block mounted to slide on the rotating shaft; a metal part which forms a cap through which the rotating shaft passes and which is secured to the frame and/or to the counter-face, the rotating shaft being free to rotate with respect to the cap and axially secured to the cap.

A method for refurbishing an assembly having a first component and a second component is provided. The first component has a fore portion welded to the second component and a flared aft portion in proximity with the second component. The method includes processing the assembly such that the flared aft portion and a part of the fore portion proximal to the flared aft portion of the first component is subject to peening until the flared aft portion is plastically deformed from an initial position to a desired final position with respect to the second component.