Hamilton Sundstrand Patente

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A compressor assembly (300) includes a compressor (144) including a central shaft (210) including an external surface (214), a shroud (220) extending circumferentially around the central shaft. The shroud including a radially inward surface (224) and radially outward surface (222) located opposite the radially inward surface. The external surface of the central shaft and the radially inward surface of the shroud are in a facing spaced relationship forming a core flow path (C) therebetween. The compressor also includes a plurality of blades (125) extending from the central shaft to the shroud. The compressor assembly also includes a compression ring (400) extending circumferentially around the shroud, the compression ring being in an interference fit with the shroud. The compression ring is configured to apply a radially inward compressive force (F1) along one or more portions of the radially outward surface of the shroud, the radially inward compressive is configured to compress the shroud and the plurality of blades into the central shaft.

An assembly includes a housing (102). A first set of coils is mounted to the housing. The first set of coils (104) extends in an axial or rotational direction along the housing for a first length. A second set of coils (106) is mounted to the housing. The second set of coils extends in the axial or rotational direction along the housing for a second length that is shorter than the first length. A core member (108) includes a first core and a second core in series with one another in an axial direction along the core member. The core member is moveable within the housing along a stroke. For at least a first portion of the stroke, the first core is within the first set of coils. For at least a second portion of the stroke, the second core is within the second set of coils.

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A damping valve (2) for a hydraulic damper (D) comprises a valve housing (4) comprising an inlet chamber (20) and an outlet chamber (22). A housing valve seat (28) is arranged between the inlet chamber (20) and the outlet chamber (22). A valve element (6) having a cylindrical first portion (8) is slidably received in a cylindrical bore (10) of the valve housing (4) and a second portion has a valve surface for selectively engaging and disengaging the housing valve seat (28) to allow passage of hydraulic fluid between the inlet chamber (20) and the outlet chamber (22). A spring element (40) is mounted within the valve housing (4) for biasing the valve element (6) into engagement with the housing valve seat (28). The bore (10) of the valve housing (4) has a closed end defining a bore chamber (76) between an end (56) of the first portion of the valve element (6) and the closed end of the bore (10). At least one first passage (A) provides fluid communication between the bore chamber (76) and the inlet chamber (20). At least one second passage (B) provides fluid communication between the bore chamber (76) and the inlet chamber (20). A one-way valve (63) is located in the at least one second passage (B) and is configured to allow flow in the at least one second passage (B) in a direction from the inlet chamber (20) to the bore chamber (76), but to block flow in the at least one second passage (B) in a direction from the bore chamber (76) to the inlet chamber (20).

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An environmental control system of an aircraft includes a ram air input (200, 210, 254, 260, 261, 290, 298) configured to receive ram air from a ram air duct of the aircraft and an electric motor (204) driven compressor system. The system also includes a RAM heat exchanger (242, 256) and an ejector (302, 402) connected to the output (212, 256, 258, 262) of the RAM heat exchanger (242, 256) that is fluidly connected to the output (212, 256, 258, 262) of a compressor in the compressor system and that causes ram air received at the cooling flow input (252) to be drawn through the RAM heat exchanger (242, 256).

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Direct pin-fin cooling assemblies (100) are disclosed for a high-power printed circuit boards (PCBs) (102). The disclosure can solve the classical coldplate problem associated with liquid cooling of high-power PCBs (102), namely: (1) Inhomogeneous cooling due to the calorimetric heating up of the coolant (116), (2) thermal interface material (TIM) related quality issues such as dry-out effects, (3) high cost due to complicated metal coldplate structure, and (4) low thermal conductivity due to multi-layer structure. This includes incorporating pin-fin direct cooling into high-power PCB structures without additional coldplate structure or TIM. In this approach, a TIM and a top plate of coldplate can be removed. Thus, the cooling performance can be improved because the thermal conductivity between a liquid coolant (116) and a power device is increased.

A shroud reinforcement (903) is provided for a shroud that is coaxial with and partially surrounds a rotor and that includes tubular and flange sections and a transition section axially interposed between the tubular and flange sections. The shroud reinforcement (903) includes first fiber-reinforced polymer-matrix composite reinforcement elements (321, 904) with fibers extending along an axial dimension of the rotor and being disposed to reinforce the transition section and first fiber-reinforced polymer-matrix composite reinforcement elements (322, 905) with fibers extending along a circumferential dimension of the rotor and being disposed to reinforce the transition section.

A fractal heat exchanger comprises: a heat exchanger core comprising a plurality of channels in a close-packed configuration, the plurality of channels comprising a plurality of first channels and a plurality of second channels; a first fractal channel for conveying a first fluid to the plurality of first channels of the heat exchanger core; and a second fractal channel for conveying the first fluid from the plurality of first channels of the heat exchanger core; wherein the first fractal channel and the second fractal channel each comprise at least one divergence point along its length where a parent channel splits into a plurality of sub-channels which diverge away from each other.

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