摘要:
A bulkhead fitting assembly that includes a tube, a mounting flange attachable to a bulkhead, a thermal shell joining the mounting flange and the tube and having a portion spaced away from the tube forming an air pocket between the tube and the thermal shell, a plurality of mounting studs extending from the mounting flange away from the thermal shell, and a plurality of bushings positioned between the mounting studs and the bulkhead. The plurality of bushings are each shaped to complete a current path from the tube to the plurality of mounting studs, from the plurality of mounting studs to the plurality of bushings, and from the plurality of bushings to the bulkhead. Nuts are threaded on the studs to secure the fitting assembly by sandwiching the bulkhead between the mounting flange and the bushings, which are retained by the nuts.
摘要:
A method of sealing an opening in a bulkhead with a fitting assembly having a tube, a mounting flange, a thermal shell, an adapter, a bushing, and a jam nut may include inserting the tube through the opening; placing the mounting flange against the bulkhead, the mounting flange attached to the thermal shell, the thermal shell attached to the tube, and the mounting flange attached to the adapter so that the adapter extends away from the mounting flange and from the thermal shell through the opening; forming an air pocket by spacing a portion of the thermal shell away from the tube; placing the bushing on the adapter; and tightening the jam nut on the adapter to sandwich the bulkhead between the mounting flange and the bushing to form a seal between the mounting flange and the bushing to seal the opening.
摘要:
The invention comprises dielectric isolators for use in aircraft fuel systems to control lightning induced current and allow dissipation of electrostatic charge. The dielectric isolators are configured to have a high enough impedance to limit lightning currents to low levels, but low enough impedance to allow electrostatic charge to dissipate without allowing buildup. Although the dielectric isolators may develop a potential difference across the dielectric length due to the effects of lightning currents and its inherent impedance, they are configured to withstand these induced voltages without dielectric breakdown or performance degradation. In one embodiment, the dielectric isolator includes a tube constructed of a composition including a thermoplastic organic polymer (e.g., PEEK) and carbon nanotubes, and a pair of fittings attached to opposing ends of the tube. In another embodiment, the dielectric isolator includes a tube, an outer annular portion, and an interconnecting web, each constructed from the composition including a thermoplastic organic polymer (e.g., PEEK) and carbon nanotubes. This later embodiment is an integrally formed one-piece structure. The dielectric isolator is capable of exhibiting an electrical resistance from about 105Ω to 108Ω at an applied potential of greater than 500 volts DC when measured from one fitting to the other fitting.
摘要:
A gas turbine engine includes a bearing support positioned fore of a compressor section along a primary flowpath. The bearing support internally includes a fluid reservoir with a reservoir tube, a fluid pump with a fluid pump tube, and a fluid coupler coupling the reservoir tube to the fluid pump tube.
摘要:
A support plate for the passage of systems between two zones at different pressurizations of an aircraft, in the region of a bulkhead separating the two zones. The support plate comprises a connection plate including at least one retaining element and at least one sealing joint and is provided with a plurality of holes intended for the passage of an assembly of systems which have to pass through said bulkhead.
摘要:
A bulkhead fitting assembly may include a tube; a mounting flange attachable to a bulkhead; a thermal shell joining the mounting flange and the tube and having a portion spaced away from the tube forming an air pocket between the tube and the thermal shell; a plurality of mounting studs extending from the mounting flange away from the thermal shell; a plurality of bushings positioned between the mounting studs and the bulkhead, the plurality of bushings each shaped to complete a current path from the tube to the plurality of mounting studs, from the plurality of mounting studs to the plurality of bushings, and from the plurality of bushings to the bulkhead; and a plurality of nuts received on the adapter to lock the fitting assembly in place by sandwiching the bulkhead between the mounting flange and the nuts, wherein the nuts are in engagement with the bushings.
摘要:
A connecting structure includes a housing, a cooler, an inner refrigerant pipe, an outer refrigerant pipe, and a joint pipe. The joint pipe is attached to a through hole of the housing. The inner refrigerant pipe is fitted to the joint pipe from a housing inner side. The outer refrigerant pipe is fitted to the joint pipe from a housing outer side. A tip of the inner refrigerant pipe and a tip of the outer refrigerant pipe define a gap inside the joint pipe. An end surface of a flange or a rib of the outer refrigerant pipe in a refrigerant-pipe axis direction abuts with an end surface of a flange or a rib of the joint pipe in the refrigerant-pipe axis direction.
摘要:
The present application is directed to dielectric isolators for use in aircraft fuel systems to control lightning induced current and allow dissipation of electrostatic charge. The dielectric isolators are configured to have a high enough impedance to limit lightning currents to low levels, but low enough impedance to allow electrostatic charge to dissipate without allowing buildup. Although the dielectric isolators may develop a potential difference across the dielectric length due to the effects of lightning currents and its inherent impedance, they are configured to withstand these induced voltages without dielectric breakdown or performance degradation. In one embodiment, the dielectric isolator includes a tube constructed of a composition including a thermoplastic organic polymer (e.g., PEEK) and carbon nanotubes, and a pair of fittings attached to opposing ends of the tube. In another embodiment, the dielectric isolator includes a tube, an outer annular portion, and an interconnecting web, each constructed from the composition including a thermoplastic organic polymer (e.g., PEEK) and carbon nanotubes. This later embodiment is an integrally formed one-piece structure. The dielectric isolator is capable of exhibiting an electrical resistance from about 105Ω to 108Ω at an applied potential of greater than 500 volts DC when measured from one fitting to the other fitting.
摘要:
A fitting and an associated grommet are provided for supporting a conduit penetrating a panel and limiting energy transfer between the conduit and panel. The fitting may include a grommet having annular first and second sections spaced apart from one another and an annular wall extending between the first and second sections such that the wall and first and second sections define a bore. A plurality of ribs protrude from the annular wall, the ribs being distributed circumferentially around the annular wall and spanning between the first and second sections. A tubular liner extends through the bore of the grommet and contacts the first and second sections. The plurality of ribs extend into the bore, and at least some of the ribs contact the liner.
摘要:
A lip coupling for connecting together two pieces of pipe above a hole in the floor, the coupling having a semi-spherical upper portion connecting with a lower cylindrical portion, the semi-spherical upper portion having an outer diameter exceeding the outer diameter of the lower cylindrical portion, the lower portion of the semi-spherical portion being provided with a generally transverse lip which is adapted to rest against the floor surrounding the hole, the lip having an underside which is provided with a curved and upwardly directed recess to prevent any unnecessary contact between the lip and any irregularity on the surface surrounding the hole.