This impeller cover is provided with: a machinable abradable seal section which has a shroud surface, which faces the outer peripheral surface of an impeller rotating about its axis, and which provides a seal between the outer peripheral surface and the shroud surface; a cover body which covers the impeller from the outside and which has a seal housing section for housing the abradable seal section therein; and a filling material which is interposed between the abradable seal section and the cover body. The seal housing section has a fitting inner peripheral surface which is extended along the axis in order for the outer peripheral surface of the abradable seal section to fit thereto, a reference surface which is used for axial positioning of the abradable seal section by being brought into contact with the abradable seal section from one side in an axial direction, and a capturing part which forms a gap in at least at a part of the section between the abradable seal section and the seal housing section in order to capture any excess filling material.

A filter screen includes a plate body with an upstream surface, an opposed downstream surface, and an array of apertures extending between the upstream surface and the downstream surface. A polytetrafluoroethylene-based layer overlays the upstream surface between apertures of the aperture array, the polytetrafluorethylene-based layer being conformally disposed over the upstream surface of the plate body and spanning the upstream surface between the apertures of the aperture array to slow deposition of carbonaceous deposits on the filter screen.

An impeller for use with centrifugal compressors or pumps is provided and described along with methods for making such multi-component polymeric articles such as open or closed impellers and other assembled molded articles, which may optionally include openings therein. The impeller includes a composite comprising a matrix material selected from at least one thermoplastic polymer or at least one thermosetting polymer; and at least one continuous reinforcing fiber. The impeller includes at least one first flange comprising the composite, the first flange having an exterior surface and an interior surface, the first flange defining a first opening extending longitudinally therethrough; and at least one rib having a first end and a second end, the at least one rib positioned such that its first end engages the at least one first flange. Ring members and additional, second flanges, and optionally outer banding rings may be provided in various designs. The multi-component polymeric composite articles are formed of composite parts that are first molded, then assembled, positioned in a mold and remolded, optionally using removable cores for retaining openings within the remolded structures.

A segmented composite shell for an axial turbomachine compressor, each segment formed of a first polymeric material and comprises at least one working surface formed of a second polymeric material co-injected with the first polymeric material. The working surface can be a contact surface with a blade, wherein the working surface has a lipped profile and is made of an elastomeric material. The working surface can be the inner surface for bonding an abradable material, wherein the material can be silicone to facilitate the bonding of the abradable material to the silicone base. The working surface can be a lateral face of the shell that contacts a mating fixed surface, wherein the material can comprise TEFLON, i.e. Polytetrafluoroethylene (PTFE), so as to form a working surface with dry friction properties. Such features enable the shell to have additional technical features implemented directly during the injection moulding of the shell segments.

A lubricating oil line of a gas turbine or a turbocharger includes a flow path component which allows passage of a lubricating oil. The flow path component used in the gas turbine includes a sump chamber and a vent line. A surface of the flow path component, which is exposed to a temperature approximately from 300 to 450 C. and comes into contact with the lubricating oil, is covered with a coating that includes nickel or a nickel-phosphorus alloy, and particles made of polytetrafluoroethylene.

A pump device includes an axially rotating tube having an internal impeller affixed. Each opposite end of the tube has an inlet and outlet so that a powering means to axially engage the tube results in moving of a fluid. The supports or monoblocks at each end of the tube provide for sealing of the fluid passing through the tube and bearing support for the rotating tube. Quick pump disassembly and assembly and the feature of simple interchangeability of impeller types result in a variety of fluids to be pumped and fast and easy pump maintenance.

A fan blade platform is provided. The fan blade platform may include a wall, a first sidewall extending from the flowpath to a circular member, and a second sidewall extending from the flowpath to the circular member. A stiffening member may also extend from the circular member to the flowpath and be formed integrally with the first sidewall, the second sidewall, and the flowpath.