Patent Application
20210283958
The present disclosure relates to wheels, and more specifically, to wheels having thermal fuse plugs disposed therein.
Aircraft typically utilize fuse plugs on wheels to release pressure and/or reduce stress on the wheel when the wheel overheats during braking. Typical fuse plugs may extend radially inward of a rim of the wheel and reduce clearance with a heat shield. Reduced clearance with the heat shield may reduce an intended function of the fuse plug having additional heat shield design complexity (i.e., addition of a relief feature). Similarly, the relief feature in the heat shield may reduce thermal protection compromising the intended function of the wheel.
A wheel is disclosed herein. The wheel may comprise: a rim defining a radially outer surface and a radially inner surface; a radial protrusion extending radially outward from the radially outer surface; and an aperture extending radially through the radial protrusion to the radially inner surface.
In various embodiments, the wheel may further comprise a first flange at a first axial end of the wheel and a second flange at a second axial end of the wheel, the radial protrusion disposed between the first flange and the second flange. The radial protrusion may be annular in shape. The aperture may be configured to receive a fuse plug. The wheel may further comprise a plurality of the aperture disposed circumferentially about the radial protrusion. Each aperture may be spaced circumferentially equal distance from an adjacent aperture in the plurality of the aperture.
A wheel assembly is disclosed herein. The wheel assembly may comprise: a wheel including a rim defining a radially outer surface; a radial protrusion extending radially outward from the radially outer surface, the radial protrusion including an aperture disposed therethrough; and a fuse plug disposed in the aperture.
In various embodiments, the fuse plug includes a fuse plug body and a eutectic material, the fuse plug body including a bottom surface and a top surface, the eutectic material disposed within the fuse plug body. The top surface may be disposed radially outward from the radially outer surface of the wheel. The wheel assembly may further comprise a heat shield disposed radially inward from the wheel, the bottom surface disposed proximate to the heat shield. The fuse plug may further comprise a circumferential groove. The wheel assembly may further comprise an O-ring disposed in the circumferential groove, the O-ring configured to couple the fuse plug to the wheel. The radial protrusion may be disposed local to the fuse plug. The bottom surface of the fuse plug may be disposed radially outward from a radially inner surface of the rim.
An assembly is disclosed herein. The assembly may comprise: a wheel having a rim, a first flange, a second flange, the first flange disposed at a first axial, the second flange disposed at a second axial end, the rim extending from the first flange to the second flange and defining a radially outer surface and a radially inner surface; a tire coupled to the wheel and disposed radially outward from the rim, the tire and the rim defining a tire cavity; a radial protrusion extending from the radially outer surface of the rim into the tire cavity, the radial protrusion including an aperture disposed therethrough; and a fuse plug disposed in the aperture.
The tire may comprise a bead width measured axially from the first flange, and the radial protrusion may be a greater axial distance from the first flange than the bead width. The radial protrusion may be annular in shape. The assembly may further comprise a plurality of the fuse plug. The plurality of the fuse plug may be disposed circumferentially about the radial protrusion. The fuse plug may be configured to release pressure from the tire cavity when a threshold temperature is reached
The foregoing features and elements may be combined in various combinations without exclusivity, unless expressly indicated herein otherwise. These features and elements as well as the operation of the disclosed embodiments will become more apparent in light of the following description and accompanying drawings.
The subject matter of the present disclosure is particularly pointed out and distinctly claimed in the concluding portion of the specification. A more complete understanding of the present disclosure, however, may best be obtained by referring to the detailed description and claims when considered in connection with the drawing figures, wherein like numerals denote like elements.
The detailed description of exemplary embodiments herein makes reference to the accompanying drawings, which show exemplary embodiments by way of illustration. While these exemplary embodiments are described in sufficient detail to enable those skilled in the art to practice the disclosure, it should be understood that other embodiments may be realized and that logical changes and adaptations in design and construction may be made in accordance with this disclosure and the teachings herein without departing from the spirit and scope of the disclosure. Thus, the detailed description herein is presented for purposes of illustration only and not of limitation.
Provided herein, according to various embodiments, is a wheel assembly. The wheel assembly comprises a wheel having a rim and a radial protrusion extending radially outward from the rim. An aperture may be disposed through the radial protrusion to a radially inner surface of the rim. A fuse plug may be disposed in the aperture. The fuse plug may be disposed radially outward from a radially inner surface of the rim or flush with the radially inner surface of the rim. In this regard, the fuse plug may be spaced apart from a heat shield disposed radially inward from the radially inner surface of the rim. In various embodiments, the wheel assembly may be configured to provide enhanced thermal protection proximate the fuse plug. In various embodiments, the wheel assembly may decrease a cost and/or complexity of a heat shield for the wheel assembly.
With reference to
Brake assembly 25 includes a plurality of brake disks 38. The plurality of brake disks 38 includes at least one non-rotatable friction disk (stator disk) 40, and at least one rotatable friction disk (rotor disk) 42. Each of the brake disks 38 includes an attachment structure. Brake disks 38 may include an end plate 32 and a pressure plate 30 located on opposing axial ends of the brake disk stack. End plate 32 is connected to, or is otherwise frictionally engaged with, a reaction plate 34 of torque plate barrel 24. End plate 32 is non-rotatable by virtue of its connection to torque plate barrel 24. Rotor disks 42 may be rotatable by virtue of their engagement with wheel assembly 200.
An actuating mechanism for the brake assembly 25 includes a plurality of piston assemblies 22 (one shown) circumferentially spaced around a piston housing 26. A tire 60 is disposed radially outward, and coupled to, wheel 210. The tire 60 and a radially outer surface of wheel 210 may define a cavity 62. The cavity may be filled with pressurized nitrogen, or the like. The wheel assembly 200 comprises a fuse plug 220 coupled to a rim 215 of wheel 210. Upon actuation, the plurality of piston assemblies affects a braking action by urging the pressure plate 30 and the plurality of stator disks 40 into frictional engagement with the plurality of rotor disks 42 and against the end plate 32. Through compression of the plurality of rotor disks 42 and the plurality of stator disks 40 between the pressure plate 30 and the end plate 32, the resulting frictional contact slows or stops or otherwise prevents rotation of the wheel 210. When a temperature proximate the fuse plug exceeds a threshold level, the fuse plug 220 is configured to release pressure in the cavity 62. In this regard, stresses experienced by wheel 210 may be reduced in response to the fuse plug 220 releasing.
Referring now to
In various embodiments, the wheel 210 may further comprise an aperture 232 disposed through the radial protrusion 230 of the wheel 210. In various embodiments, the wheel 210 may further comprise a plurality of the aperture 232 disposed circumferentially about the radial protrusion 230. For example, the wheel 210 may comprise three of the aperture 232 disposed equally apart circumferentially about the radial protrusion 230, or the wheel 210 may comprise four of the aperture 232 disposed equally apart circumferentially about the radial protrusion 230, or any number of aperture 232 may be disposed equally apart circumferentially about the radial protrusion 230. In various embodiments, the plurality of the aperture 232 may be disposed at different distances from adjacent apertures in the plurality of the aperture 232. In various embodiments, the aperture 232 may be configured to receive a fuse plug (e.g., fuse plug 220 from
Referring now to
The torque bar 240 is disposed radially inward of the wheel 210. The torque bar 240 may be coupled to the wheel 210 by any method known in the art, such as a nut and fastener, a press fit, or the like. In various embodiments, the heat shield 250 is disposed radially between the torque bar 240 and the wheel 210. The heat shield 250 may be limited in size and shape due to limited radial space between the torque bar 240 and the wheel 210. The torque bar 240 engages rotating brake disks (e.g., rotor disks 42 from
Typical fuse plugs may extend radially inward from a radially inner surface 214 of the rim 215. In this regard, typical fuse plugs may reduce clearance with the heat shield 250 upon assembly or during use of the wheel assembly 200. Due to reduced clearance with the heat shield 250, typical fuse plugs may not function correctly. In contrast, since the fuse plug 220 is disposed in aperture 232, which extends through radial protrusion 230, a clearance may be maintained upon assembly between the fuse plug 220 and heat shield 250. As such, the heat shield may comprise an increased thickness relative to typical wheel assemblies. In various embodiments, the wheel assembly 200 may further provide greater thermal protection proximate the fuse plug 220. In various embodiments, the wheel assembly 200 may further provide a decrease in cost and weight by removing local features on the heat shield 250 to address typical fuse plug issues. In various embodiments, a bottom axial surface 223 of the fuse plug 220 may be disposed radially outward from radially inner surface 214 of the rim 215. In various embodiments, the bottom axial surface 223 of the fuse plug 220 may be disposed flush with the radially inner surface 214 of the rim 215. In various embodiments, a top axial surface 225 of the fuse plug 220 may be disposed radially outward from radially outer surface 231 of the radial protrusion 230. In various embodiments, the top axial surface 225 of the fuse plug 220 may be disposed flush with the radially outer surface 231 of the radial protrusion 230.
In various embodiments, with brief reference back to
Benefits, other advantages, and solutions to problems have been described herein with regard to specific embodiments. Furthermore, the connecting lines shown in the various figures contained herein are intended to represent exemplary functional relationships and/or physical couplings between the various elements. It should be noted that many alternative or additional functional relationships or physical connections may be present in a practical system. However, the benefits, advantages, solutions to problems, and any elements that may cause any benefit, advantage, or solution to occur or become more pronounced are not to be construed as critical, required, or essential features or elements of the disclosure.
The scope of the disclosure is accordingly to be limited by nothing other than the appended claims, in which reference to an element in the singular is not intended to mean “one and only one” unless explicitly so stated, but rather “one or more.” It is to be understood that unless specifically stated otherwise, references to “a,” “an,” and/or “the” may include one or more than one and that reference to an item in the singular may also include the item in the plural. All ranges and ratio limits disclosed herein may be combined.
Moreover, where a phrase similar to “at least one of A, B, and C” is used in the claims, it is intended that the phrase be interpreted to mean that A alone may be present in an embodiment, B alone may be present in an embodiment, C alone may be present in an embodiment, or that any combination of the elements A, B and C may be present in a single embodiment; for example, A and B, A and C, B and C, or A and B and C. Different cross-hatching is used throughout the figures to denote different parts but not necessarily to denote the same or different materials.
The steps recited in any of the method or process descriptions may be executed in any order and are not necessarily limited to the order presented. Furthermore, any reference to singular includes plural embodiments, and any reference to more than one component or step may include a singular embodiment or step. Elements and steps in the figures are illustrated for simplicity and clarity and have not necessarily been rendered according to any particular sequence. For example, steps that may be performed concurrently or in different order are illustrated in the figures to help to improve understanding of embodiments of the present disclosure.
Any reference to attached, fixed, connected or the like may include permanent, removable, temporary, partial, full and/or any other possible attachment option. Additionally, any reference to without contact (or similar phrases) may also include reduced contact or minimal contact. Surface shading lines may be used throughout the figures to denote different parts or areas but not necessarily to denote the same or different materials. In some cases, reference coordinates may be specific to each figure.
Systems, methods and apparatus are provided herein. In the detailed description herein, references to “one embodiment,” “an embodiment,” “various embodiments,” etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described. After reading the description, it will be apparent to one skilled in the relevant art(s) how to implement the disclosure in alternative embodiments.
Furthermore, no element, component, or method step in the present disclosure is intended to be dedicated to the public regardless of whether the element, component, or method step is explicitly recited in the claims. No claim element is intended to invoke 35 U.S.C. 112(f) unless the element is expressly recited using the phrase “means for.” As used herein, the terms “comprises,” “comprising,” or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
