A pressure relief apparatus for an engine compartment having a wall and an opening in the wall is provided. The pressure relief apparatus includes a door panel arranged in blocking relationship to the opening in the wall of the engine compartment, a plurality of hinges coupling the door panel to an
A pressure relief apparatus for an engine compartment having a wall and an opening in the wall is provided. The pressure relief apparatus includes a door panel arranged in blocking relationship to the opening in the wall of the engine compartment, a plurality of hinges coupling the door panel to an inner surface of the wall of the engine compartment, a spring assembly coupled between each hinge and the inner surface of the wall, wherein the spring assembly includes a canister having an open end and a spring element housed within the canister, and a support fitting mounted to the engine compartment wall and having a portion extending toward the open end of the canister for applying a compressive force on the spring element.
대표청구항▼
1. A pressure relief apparatus for an engine compartment having a wall and an opening in the wall, comprising: a door panel arranged in blocking relationship to the opening in the wall of the engine compartment,a plurality of hinges mounted to an inner surface of the wall for coupling the door panel
1. A pressure relief apparatus for an engine compartment having a wall and an opening in the wall, comprising: a door panel arranged in blocking relationship to the opening in the wall of the engine compartment,a plurality of hinges mounted to an inner surface of the wall for coupling the door panel to the inner surface of the wall of the engine compartment,a spring assembly coupled to each hinge, wherein the spring assembly includes a canister having an open end and a spring element housed within the canister, anda support fitting mounted to the inner surface of the wall and having a portion extending toward the open end of the canister for applying a compressive force on the spring element, wherein the spring assembly is coupled between the hinge and the support fitting, wherein the spring element has one end portion communicating with the open end of the canister, and the support fitting portion is positioned against the one end portion of the spring element. 2. The pressure relief apparatus of claim 1, wherein the canister is pivotally mounted to the hinge between end portions thereof, and the support fitting associated with each hinge includes a crossbar located adjacent the canister, an end portion of the spring assembly proximate the canister open end being operatively coupled with the crossbar of the support fitting to cause a preload compressive force to be exerted on the spring element in advance of any movement of the door panel into or out of the engine compartment wall opening. 3. The pressure relief apparatus of claim 1, wherein Ti-6-2-4-2 is the metal material used for the door panel, the hinges, and the support fitting, and the spring element is made from Nickel alloy 718. 4. The pressure relief apparatus of claim 1, wherein the canister includes an end cap opposite the canister open end, the canister defining an axis of compression along which the spring element is compressed,the hinge comprises an elongated hinge element having one end portion attached to the door panel and an opposing end portion pivotally mounted to the engine compartment wall, the hinge element carrying between the end portions at least one laterally extending member, andthe end cap of the canister is pivotally mounted to one laterally extending member of the at least one laterally extending member,whereby as the door panel opens and closes, a crossbar of the support fitting moves into and out of the canister open end thereby applying and removing a compressive force on the spring element in the canister. 5. The pressure relief apparatus of claim 4, wherein the laterally extending member defines a first pivot axis and the hinge defines a second pivot axis positioned further away from the crossbar of the support fitting than the first pivot axis. 6. The pressure relief apparatus of claim 5, wherein when the door panel opens, the distance between the axis of compression of the canister and the second pivot axis decreases thereby compressing the spring element in the canister. 7. The pressure relief apparatus of claim 5, wherein as the door panel closes, the distance between the axis of compression and the second pivot axis increases so that the compressive force on the spring element is relieved. 8. The pressure relief apparatus of claim 4, wherein as the door panel opens, the distance between the axis of compression of the canister and the second pivot axis decreases thereby compressing the spring element in the canister, and as the door panel closes, the distance between the axis of compression and the second pivot axis increases so that the compressive force on the spring element is relieved, whereby a near constant opening and closing force controls the motion of the door panel throughout the entire range of motion of the door panel. 9. The pressure relief apparatus of claim 4, wherein the hinge element carries between its end portions two laterally extending members, and the spring assembly includes two canisters, each having an open end and housing its own spring element, and the crossbar of the support fitting is positioned adjacent to, and is operatively coupled with, the open ends of both of said canisters. 10. The pressure relief apparatus of claim 9, wherein the two laterally extending members project to opposite sides of the hinge element and are co-extensive. 11. The pressure relief apparatus of claim 1, wherein the spring element is entirely housed within the canister and the canister shields the spring element from impingement of hot gases from the engine operating inside the engine compartment when the door panel is closed, thereby increasing the durability of the spring element. 12. The pressure relief apparatus of claim 1, wherein slots are provided in diametrically opposed sides of the canister in the vicinity of the canister open end, and a spring retainer supports stop pins that fit in and ride along the slots, the slots having a finite axial extent so that when the door panel opens it is prevented from hitting structural parts located outside the engine compartment. 13. The pressure relief apparatus of claim 1, wherein the canister includes small lock out holes proximate the open end that permit insertion of a rod to hold the spring element in compression so that the spring element or the spring assembly can be removed. 14. The pressure relief apparatus of claim 1, wherein the engine compartment encloses one of an aircraft turbine or an automobile engine. 15. A method of relieving excessive pressure within an engine compartment by opening and closing a pressure relief door blocking an opening in an engine compartment, comprising the steps of: mounting the pressure relief door on the wall in blocking relationship to the opening,pivotally securing the door to an inner surface of the engine compartment with a plurality of hinges mounted to the inner surface such that the door opens outwardly of the engine compartment when pressure in the engine compartment exceeds a threshold amount,attaching a spring between each hinge and a support fitting mounted to the inner surface of the engine compartment so that the spring holds the door in a first position wherein the opening is closed,compressing the spring by a threshold amount such that the door will move away from the opening only when the pressure in the engine compartment exceeds the threshold force,providing a pivot between the door and the inner surface of the engine compartment, andarranging the spring relative to the pivot such that as the door opens, the distance between the spring axis of compression and the pivot decreases thereby compressing the spring element, and as the door closes, the distance between the spring axis of compression and the pivot increases so that the compressive force on the spring element is relieved, whereby a substantially constant opening and closing force controls the motion of the door throughout the entire range of motion of the door. 16. The method of claim 15, and further including the step of enclosing the spring within a canister so that the spring will be protected from corrosive exhaust gases. 17. An apparatus for relieving excessive pressure within an engine compartment by moving a pressure relief door from a first position blocking an opening in an engine compartment to at least one other position in which the opening is unblocked and excessive pressure in the engine compartment is relieved, the apparatus comprising: a pair of first brackets mounted to a wall of the engine compartment proximate the opening, each first bracket including a pivot,a gooseneck hinge mounted between the pivot and the door, wherein the pivot enables movement of the door into and out of blocking relationship with the opening, anda spring assembly including a spring element having a first region attached to and carried by a respective gooseneck hinge, anda pair of second brackets mounted to the engine compartment wall and each having a portion bearing against and applying a threshold compressive force to the respective spring element, the threshold force acting to hold the door in its first position until the pressure in the engine compartment exceeds the threshold force,whereupon when the pressure in the engine compartment becomes excessive and the threshold force is overcome, the door opens outwardly of the engine compartment to one of its at least one other positions against the force of the respective spring element. 18. The apparatus of claim 17, wherein said spring assembly further includes a container housing the spring element and protecting it from corrosive exhaust gases within the engine compartment, and the portion of the second brackets applying a threshold force against the respective spring element engages a second region removed from the first region. 19. The apparatus of claim 18, wherein the engine compartment contains an aircraft turbine.
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이 특허에 인용된 특허 (8)
Jones,Gary L.; Meernik,Paul R.; Browne,Alan L.; Aase,Jan H., Active pressure relief valves and methods of use.
Balzer Ronald L. (Bothell WA) Jensen Daniel T. (Indianapolis IN) Sangwin Michael L. (Kirkland WA), Flow control apparatus for gas turbine engine installation pressure relief doors.
Laborie Daniel J. (Cincinnati OH) Marban Joseph R. (Springdale OH) Schulze Wallace M. (West Chester OH) Baumbick Robert J. (West Chester OH), Nacelle cooling and ventilation system.
Laborie Daniel J. (Cincinnati OH) Marban Joseph R. (Springdale OH) Schulze Wallace M. (West Chester OH) Baumbick Robert J. (West Chester OH), Nacelle cooling and ventilation system.
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