A fuel injector is provided. The fuel injector includes an injector support and a heat shield coupled to the injector support. The heat shield only interacts with the injector support by way of contacts such as point contacts, line contacts or surface contacts. Further, the heat shield includes a bo
A fuel injector is provided. The fuel injector includes an injector support and a heat shield coupled to the injector support. The heat shield only interacts with the injector support by way of contacts such as point contacts, line contacts or surface contacts. Further, the heat shield includes a body portion, a radially extending flared end portion and a radially directed shoulder interposed between the body portion and the flared end portion. The shoulder portion acts as a flexure point that flexes and absorbs thermal expansion of the heat shield.
대표청구항▼
What is claimed is: 1. A fuel injector for comprising: an injector support including a mounting portion, a stem portion and a mounting flange interposed between the mounting portion and the stem portion and extending radially outward from the head and stem portions, the injector support further inc
What is claimed is: 1. A fuel injector for comprising: an injector support including a mounting portion, a stem portion and a mounting flange interposed between the mounting portion and the stem portion and extending radially outward from the head and stem portions, the injector support further including a bore extending through the mounting portion and stem portion; and a heat shield surrounding at least the stem portion of the injector support, wherein the heat shield is operably coupled to the injector support to reduce heat transfer therebetween; wherein the heat shield is operably coupled to the injector support such that the heat shield interacts with the injector support solely through one or more contacts; and wherein the heat shield includes a generally annular body portion extending between first and second opposed ends, the heat shield further including a radially outward extending flared extension portion proximate a first end thereof, the first end of the heat shield contacting the mounting flange proximate a terminating end of the flared extension portion. 2. The fuel injector of claim 1, wherein a gap is formed between the heat shield and the injector body. 3. The fuel injector of claim 2, wherein the flared extension portion further includes a contact ring, the contact ring having a wall thickness greater than the wall thickness of the heat shield, the contact ring forming the part of the flared extension portion proximate the terminating end being in contact with the mounting flange. 4. The fuel injector of claim 1, wherein the heat shield includes a transition shoulder transitioning the body portion into the flared extension portion. 5. The fuel injector of claim 4, wherein the transition shoulder provides a flexure point for accommodating thermal expansion and contraction of the heat shield by transitioning between a concave state and a convex state. 6. The fuel injector of claim 4, wherein the mounting flange and flared extension portion extend at an angle of between about fifty degrees and ninety degrees relative to an axis defined by the stem portion. 7. The fuel injector of claim 6, wherein the mounting flange and the flared extension portion are substantially parallel to one another. 8. The fuel injector of claim 1, wherein the injector support further includes a protrusion proximate a downstream end, the heat shield is axially secured to the injector support by being positioned between the mounting flange and the protrusion 9. A combustion assembly for combusting fuel, comprising: an engine case defining a cavity; a fuel injector mounted to the engine case, the fuel injector including a support structure including a mounting portion, a body portion and a mounting flange extending radially outward from the mounting portion; a heat shield including a heat shield body portion and a flared flange, the flared flange extending radially outward beyond the heat shield body portion; and wherein the fuel injector extends into the cavity through an aperture in the engine case with the mounting portion positioned outside of the cavity and the body portion positioned within the cavity, the aperture being sized smaller than the mounting flange and the flared flange such that the mounting flange and flared flange overlap a portion of the engine case, the overlapping portion of the flared flange being sandwiched between the engine case and the mounting flange. 10. The combustion assembly of claim 9, wherein the flared flange includes a contact ring, the contact ring forming a terminating end of the flared flange. 11. The combustion assembly of claim 9, wherein the flared flange only contacts the mounting flange at a location external to the cavity. 12. The combustion assembly of claim 11, wherein the heat shield is operably coupled to the support structure to reduce heat transfer therebetween. 13. The combustion assembly of claim 12, wherein the heat shield interacts with the support structure solely through contacts. 14. The combustion assembly of claim 13, wherein the surface of the flared flange that contacts the mounting flange is textured to reduce heat transfer between the flared flange and the mounting flange. 15. The combustion assembly of claim 10, wherein the contact ring has a wall thickness that is greater than a wall thickness of the rest of the flared flange such that a gap is formed between the rest of the flared flange and the mounting flange when the contact ring is in contact with the mounting flange. 16. A fuel injector for use in a combustion chamber bounded by a boundary, the boundary wall defining an aperture through which the injector can extend, the fuel injector comprising: an injector support including a stem portion and a mounting flange extending radially outward from the stem portion, the injector support further including a bore extending through stem portion; and a heat shield including a body portion, a flared end extending radially outward from the body portion and a shoulder transitioning between the body portion and the flared end, the body portion surrounding the stem portion of the injector support, the flared end being generally aligned with the mounting flange of the injector support, the shoulder and the mounting flange forming a gap therebetween, wherein the shoulder provides a flexure point for accommodating thermal expansion and contraction of the heat shield by transitioning between a concave state and a convex state. 17. The fuel injector of claim 16, wherein the heat shield is operably coupled to the injector support solely through contacts. 18. The fuel injector of claim 16, wherein the shoulder flexes in a direction extending generally perpendicular to the radially extending flared end.
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이 특허에 인용된 특허 (8)
Stotts Robert E. (Newark NY), Clip attached heat shield.
Moertle George E. ; Vickers Edward C. ; Brensike Scott ; Creevy Clifford S. ; Mueller Peter W., Methods and apparatus for shielding heat from a fuel nozzle stem of fuel nozzle.
Franks, Gregory S.; Knight, Joshua G.; Worthington, Joseph A.; Rasener, Fred M.; Stacy, L. Eric; Small, Hanna Christine; Yeole, Amit; Monahan, Timothy John, Heat transferring fuel injector combustion seal with load bearing capability.
Franks, Gregory S.; Knight, Joshua G.; Rasener, Fred M.; Small, Hanna C.; Stacy, Eric L.; Worthington, Joseph A.; Yeole, Amit, Internal combustion engine including an injector combustion seal positioned between a fuel injector and an engine body.
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