Air data probe electronics housing with thermal isolating features
In some applications, aircraft air data probes are heated to prevent rain, ice, or other moisture from attaching to the air data probe, ensuring proper functionality of the air data probe. But the elevated temperatures can have negative effects on the electronic components positioned within the air data probe. Therefore, thermal isolating features are added to a housing to thermally isolate the heated parts of the air data probe from the electronic components within the air data probe, which are required to stay relatively cool for proper functioning.
1. An air data probe comprising:
a body comprising an inlet fluidly coupled to an outlet;
a heating element positioned within the body of the air data probe, wherein the heating element is configured to increase a temperature of the body;
a sensing probe positioned within the body, wherein the sensing probe includes a sensing base coupling the sensing probe to the body; and
a housing positioned within and coupled to the body, wherein the housing includes:
a housing body including an upper surface, a lower surface, an inner surface of an inner wall, and an outer surface of an outer wall;
wherein the inner wall is offset from the outer wall such that a gap is positioned between the inner wall and the outer wall;
wherein the housing surrounds a plurality of electrical wires extending from the sensing probe, and wherein the plurality of electrical wires are electrically coupled to a plurality of electrical leads;
wherein a connection point between the plurality of electrical wires and the plurality of electrical leads is encompassed by a potting, and wherein the potting is positioned within the inner surface of the inner wall of the housing body, whereby the potting is hindered from growing outside an intended adhesion area.
2. The air data probe of claim 1 , wherein the potting extends a partial distance from the upper surface of the housing towards the lower surface of the housing, and wherein the potting is constructed from a high-temperature epoxy material.
3. The air data probe of claim 1 , wherein a plurality of apertures extend through the upper surface of the housing body to the gap positioned between the inner wall and the outer wall of the housing body.
4. The air data probe of claim 1 , wherein:
the inner wall and the outer wall of the housing body have equal thicknesses; and
the outer wall of the housing body fully surrounds a circumference of the inner wall of the housing body.
5. The air data probe of claim 1 , wherein the inner wall is a hollow cylinder extending from the lower body to the upper surface, and wherein the outer wall is a hollow cylinder extending from the lower body to the upper surface, and wherein the inner wall and the outer wall are concentric.
6. The air data probe of claim 1 and further comprising a flange extending around an outer surface of the body and an electrical connector positioned at a distal end of the air data probe opposite the inlet of the air data probe.
7. The air data probe of claim 1 , wherein the housing is coupled to the body through a welded connection.
8. The air data probe of claim 1 , wherein the air data probe is a total air temperature probe configured to measure air temperature outside an outer skin of an aircraft.
9. A housing for surrounding electrical components within an air data probe configured to gather data during flight of an aircraft, the housing comprising:
a housing body including an upper surface, a lower surface, an inner surface, an outer surface, a rim positioned adjacent the upper surface, and a lower body positioned adjacent the lower surface;
an inner wall offset from an outer wall such that a gap is positioned between the inner wall and the outer wall, wherein the inner wall and the outer wall converge and are coupled adjacent the lower body of the housing body, and
a first alignment feature and a second alignment feature, wherein the first alignment feature is positioned adjacent the rim of the housing body, and wherein the second alignment feature is positioned adjacent the lower body of the housing body.
10. The housing of claim 9 , wherein:
the first alignment feature and the second alignment feature are vertically aligned with respect to a vertical plane extending from the lower surface to the upper surface of the housing body;
the first alignment feature is an indentation extending into the housing body; and
the second alignment feature is a protrusion extending outwards from the outer surface of the housing body.
11. The housing of claim 9 , wherein a plurality of apertures extend through the upper surface of the housing body to the gap positioned between the inner wall and the outer wall.
12. The housing of claim 9 , wherein the inner wall and the outer wall have equal thicknesses.
13. The housing of claim 9 , wherein the outer wall fully surrounds a circumference of the inner wall.
14. The housing of claim 9 , wherein the inner wall is a hollow cylinder extending from the lower body to the upper surface, and wherein the outer wall is a hollow cylinder extending from the lower body to the upper surface, and wherein the inner wall and the outer wall are concentric.
15. The housing of claim 9 , wherein the inner wall extends a partial distance from the outer wall of the housing towards a central axis of the housing, such that an aperture aligned with the central axis extends through the housing from the upper surface to the lower surface of the housing.
16. The housing of claim 9 , wherein the housing includes a circular cross-section, such that the housing is generally cylindrical in shape.
17. The housing of claim 9 , wherein an outer diameter of the rim is less than an outer diameter of the lower body.