Hamilton Sundstrand Patente

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A method of forming a wear-resistant coating on an article includes depositing a chromium coating (22) on a substrate (26) of the article, and subsequently heating the coated article to enhance a plurality of through-cracks within the chromium coating (22). The method further includes applying a liquid filler material to the coated article such that at least one of the plurality of through-cracks is at least partially occupied by the filler material, and solidifying the liquid filler material.

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The present disclosure provides for heat exchanger assemblies, systems and methods. More particularly, the present disclosure provides for radially-flowing cross flow heat exchanger assemblies and systems that increase primary heat transfer surface, and related methods of use. The present disclosure provides for a cross-flow heat exchanger assembly that can be packaged cylindrically or the like (or other selfenclosed shapes), and where the heat exchanger assembly also increases and/or maximizes primary heat transfer surface area by utilizing a weave-style or interwoven heat exchanger core (12). A first circuit flow path (14) can be axial or circumferential in nature, and a second circuit flow path (16) can be radial.

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A duty cycle-based bit interface system includes a first stage voltage converter (104) and second stage voltage converter (106) in signal communication with the first stage voltage converter. The first stage voltage converter converts a digital voltage signal into an analog voltage signal. The second stage voltage converters convert the digital voltage signal into a scaled version of the same. A sampling unit (108) is in signal communication with at least one of the second stage voltage converters, and is configured to sample a portion of the first stage analog output voltage signal during a sampling time period. The sampled portion has a duty cycle based-analog voltage signal during the sampling time period. A bit selector unit (110) is in signal communication with the sampling unit, and outputs a bit enable signal that initiates a specific diagnostic test among a plurality of diagnostic tests based on the duty cycle of the sampled portion.

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A pin (100) for a heat exchanger (10) is disclosed. The pin comprises: a monolithic top section (102); a monolithic bottom section (106); and a middle section (104) comprising a plurality of spaced apart sub-pins (108,110,112) extending between the top section and the bottom section, wherein the plurality of sub-pins define one or more windows (114,116,118) for allowing fluid flow through the middle section. Also disclosed is a layer (30) of a heat exchanger (10) including the pin (100), as well as a heat exchanger (10) including the layer (30), and a method of making a layer for a heat exchanger.

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Disclosed is a compression apparatus, comprising: an outer shell (12); a first plate (14) and second plate (16), wherein the first plate and the second plate are located within the outer shell, wherein a face (18) of the first plate opposes a face (20) of the second plate; and a compression mechanism (22) which retractably moves the face of the second plate into contact with the face of the first plate; wherein the face of the first plate or the face of the second plate comprises a substrate layer (24), and a coating layer (26) over the substrate layer, wherein the coating layer comprises a plasma-enhanced chemical vapor deposition material.

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A method of manufacturing an integral impeller (116) and drive motor rotor (136). The method includes: a first step of manufacturing an impeller (116) with a shroud (132), a second step of modifying a radially outer surface of the shroud (132) to prepare the radially outer surface for additive manufacturing, a third step of additively manufacturing a drive motor rotor (136) onto said radially outer surface of the shroud (132) whereby the drive motor rotor (136) has a magnetic field being optimized via a computer model, and a further step of magnetizing the rotor (136).

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A wedge (32) for securing windings in a slot in the rotor poles of a rotor core of an electrical machine includes an elongate wedge body (102) extending in an axial direction along a longitudinal axis. The wedge body (102) includes layers (104,106) perpendicular to the axial direction. The layers vary in electrical conductivity from layer to layer to inhibit eddy currents within the wedge body (102).

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A resistor pack assembly (20) including an anti-rotation housing (32). The anti-rotation housing includes a first surface (32a), a second surface (32b) opposite the first surface, one or more anti-rotation lugs (35) extending away from the first surface, and an internal cavity (32c) extending from the second surface into the anti-rotation housing towards the first surface. The resistor pack assembly also including a positive rail (34) located at least partially within the internal cavity, a negative rail (42) having an inner circular face (42a) and an outer circular face (42b) located radially outward from the inner circular face, and an insulator ring (40) is interposed between the second surface of the anti-rotation housing and the outer circular face of the negative rail.

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A ducting system has a first upstream location is to be connected to a first source of air (22). A downstream location in the duct is to be connected to a second source of air. The upstream location has a first valve (28), and the downstream location has a second valve (42). An end location of the duct is to be connected to a sink (26). A control for the valves achieves a desired pressure and temperature of air at the end location. The first temperature sensor (34) is located at a position intermediate the upstream location and the downstream location. A second temperature sensor is located at a position intermediate the downstream location and the end location. A control is programmed to determine the health of the first and second valves based upon a difference between temperatures sensed by the first and second sensors. An air use system and a method are also disclosed.

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