A refrigerant compressor according to an exemplary aspect of the present disclosure includes, among other things, a floating ring seal having a nose configured to contact a housing. Further, a low friction coating including carbon nanotubes (CNTs) is applied to one or both of the nose and the housing. In another aspect of this disclosure, the floating ring seal has first and second noses configured to contact the housing, and the first nose is radially spaced-apart from the second nose.

A bearing compartment seal for a gas turbine engine includes at least one seal ring defining an axis and having a radially inward facing sealing surface and a seal runner having a support constructed of a first material and an interface portion constructed of a second material. The interface portion includes a radially outward facing surface. A first coefficient of thermal expansion of the second material is at most approximately equal to a second coefficient of thermal expansion of the at least one seal ring.

An assembly is provided for rotational equipment. This assembly includes a stationary structure, a rotating structure rotatable about an axial centerline, and a non-contact seal assembly. The non-contact seal assembly is configured to substantially seal a gap between the stationary structure and the rotating structure. The non-contact seal assembly includes a seal shoe configured to sealingly engage the rotating structure axially along the axial centerline.

A sealing assembly and a turbomachine including the sealing assembly are provided. The sealing assembly includes a sealing body configured to be inserted into an insertion hole of a second component adjacent to a first component, and a sealing protrusion, formed on one circumferential side of the sealing body, protruding toward one circumferential direction from the sealing body and configured to be inserted into a sealing groove formed on the other circumferential side of a sealing body of the first adjacent sealing assembly, the sealing body of the first adjacent sealing assembly being adjacent to the sealing body in a circumferential direction.

A damper seal for a turbomachine includes an annular body having an inner circumferential surface and an outer circumferential surface separated by a thickness. As such, the inner circumferential surface may define a plurality of cavities arranged into a plurality of circumferential rows and at least one partition positioned between at least two of the plurality of cavities. In addition, the inner circumferential surface may further define at least one plenum arranged between two of the plurality of circumferential rows.

A seal ring has, on an outer peripheral surface side thereof, a pair of recessed parts 140 extending in a circumferential direction on both sides in a width direction thereof to form a projection part 120 between the pair of recessed parts 140, and has a plurality of ribs 130 connected to the projection part 120 and extending to lateral surfaces of the seal ring at intervals in the circumferential direction inside the pair of recessed parts 140, and a plurality of ribs 130 arranged on a sealed region side among the plurality of ribs 130 have lateral-wall surfaces on an upstream side in a relative rotation direction of a housing with respect to a shaft, each of the lateral-wall surfaces having inclined surfaces inclined from the upstream side to a downstream side in the relative rotation direction of the housing from the projection part 120 toward the lateral surfaces of the seal ring.

A device for adjusting and compensating working wear gaps of a floating seal ring, which is provided on a movable seat chamber, a floating seal ring and a rubber ring are provided in the movable seat chamber, the movable seat chamber and the shaft are sealed by a shaft sealing rubber ring, wherein: adjusting screw holes are provided on a center of the shaft along an axial direction, a bayonet slot for penetrating the shaft is provided on an outer side of the shaft along a radial direction, a bayonet is provided in the bayonet slot, and a locking groove is provided on an end portion of the movable seat chamber, an adjusting screw inserted into the adjusting screw hole is provided on an end portion of the shaft. The bayonet is locked into the locking groove of the movable seat chamber, so as to form an integral linkage of the bayonet, the shaft and the movable seat chamber, which are capable of rotating along the shaft. A first end of the adjusting screw is located outside the end portion of the shaft, a second end of the adjusting screw passes through the adjusting screw hole and contacts a first end of the bayonet, and a second end of the bayonet is located in the locking groove of the movable seat chamber for pushing the moving seat chamber. The working wear gaps of the floating seal ring are variable and adjustable, and random wear compensation can be performed, so the service life of the floating seal ring can be doubled.

A labyrinth sealing device for reducing gas intrusion is provided. A sealing bush is provided with a jet hole at the front of a tooth tip gap. The jet hole faces a tip of a corresponding sealing tooth. A gas flow injected by the jet hole suppresses hot gas flowing into the tooth tip gap. The sealing bush is provided with a first intercepting member at the rear of the tooth tip gap, and the sealing tooth is provided with a second intercepting member at the rear of the tooth tip gap. The first intercepting member hinders hot gas flowing against an inner wall of the sealing bush, and the second intercepting member hinders hot gas flowing against the sealing tooth, such that a part of the hot gas flows in a reverse direction and is violently mixed with subsequent hot gas.

The seal ring is annular around an axis x and includes an annular outer peripheral surface facing an outer periphery side, and a plurality of recessed parts. The recessed parts are formed in such a way as to be spaced apart from each other in a circumferential direction and are recessed from the outer peripheral surface toward an inner periphery side. The recessed parts expand, in the axis x direction, from one side surface to a position which does not reach another side surface. The outer peripheral surface includes a annular contact surface between the another side surface and the position, and rib surfaces respectively between mutually neighboring recessed parts in the circumferential direction. Each of the rib surfaces extends between the one side surface and the position in the axis x direction.

A stuffing box for sealing a top opening of a vertical pump, including: a housing with a vertical tube for rotatably disposing a shaft of the vertical pump, an annular bearing that: divides the vertical tube in a lower half and an upper half, and fills an annular space between an inner wall of the vertical tube and the shaft, such that as less fluid as possible passes from the lower half through the annular bearing to the upper half, an outlet pipe for discharging the fluid passing through the annular bearing.