Thermally actuated passive gas turbine engine compartment venting
First Claim
1. A thermally actuated venting system comprising:
- a thermally actuated air vent for opening an air vent outlet in a gas turbine engine associated compartment, the vent outlet located at or near the top of the compartment,a passive thermal actuator in the compartment, the thermally actuated air vent including a hinged door operably connected to the passive thermal actuator for opening the vent outlet, a thermal fuse incorporated in the thermal actuator for closing the door during a fire in the compartment,the thermal actuator operable for opening the thermally actuated air vent based on a temperature of the compartment and venting hot air from the compartment, the thermal actuator including a piston disposed within a cylinder, a chamber within the cylinder between the piston and a bottom wall of the cylinder, a piston rod extending upwardly from the piston through an aperture in a top wall of the cylinder, a distal end of the piston rod connected to the hinged door, anda phase change material in the chamber having a liquid state below a predetermined actuation temperature and a gaseous state above the predetermined actuation temperature,the thermal fuse including the piston rod or a portion of the piston rod made of a fuse material having a melting point above the predetermined actuation temperature and the melting point being in a range between 786 and 1202 degrees Fahrenheit.
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Accused Products
Abstract
A thermally actuated venting system includes a thermally actuated vent for opening a vent outlet in a gas turbine engine associated compartment with a passive thermal actuator located in the compartment based on a temperature of the compartment. Outlet may be located at or near a top of a core engine compartment, a fan compartment, or a pylon compartment. Actuator may be operably connected to a hinged door of vent for opening outlet. Actuator may be actuated by a phase change material disposed in a chamber and having a liquid state below a predetermined actuation temperature and a gaseous state above the predetermined actuation temperature. Actuator may include a thermal fuse for closing door during a fire. Thermal fuse may include at least a portion of piston rod or a cylinder wall of actuator being made of a fuse material having a melting point substantially above the predetermined actuation temperature.
43 Citations
10 Claims
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1. A thermally actuated venting system comprising:
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a thermally actuated air vent for opening an air vent outlet in a gas turbine engine associated compartment, the vent outlet located at or near the top of the compartment, a passive thermal actuator in the compartment, the thermally actuated air vent including a hinged door operably connected to the passive thermal actuator for opening the vent outlet, a thermal fuse incorporated in the thermal actuator for closing the door during a fire in the compartment, the thermal actuator operable for opening the thermally actuated air vent based on a temperature of the compartment and venting hot air from the compartment, the thermal actuator including a piston disposed within a cylinder, a chamber within the cylinder between the piston and a bottom wall of the cylinder, a piston rod extending upwardly from the piston through an aperture in a top wall of the cylinder, a distal end of the piston rod connected to the hinged door, and a phase change material in the chamber having a liquid state below a predetermined actuation temperature and a gaseous state above the predetermined actuation temperature, the thermal fuse including the piston rod or a portion of the piston rod made of a fuse material having a melting point above the predetermined actuation temperature and the melting point being in a range between 786 and 1202 degrees Fahrenheit. - View Dependent Claims (2, 3, 4, 5)
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6. A thermally actuated venting system comprising:
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a thermally actuated air vent for opening an air vent outlet in a gas turbine engine associated compartment, the vent outlet located at or near the top of the compartment, a passive thermal actuator in the compartment, the thermally actuated air vent including a hinged door operably connected to the passive thermal actuator for opening the vent outlet, a thermal fuse incorporated in the thermal actuator for closing the door during a fire in the compartment, the thermal actuator operable for opening the thermally actuated air vent based on a temperature of the compartment and venting hot air from the compartment, the thermal actuator including a piston disposed within a cylinder, a chamber within the cylinder between the piston and a bottom wall of the cylinder, a piston rod extending upwardly from the piston through an aperture in a top wall of the cylinder, a distal end of the piston rod connected to the hinged door, and a phase change material in the chamber having a liquid state below a predetermined actuation temperature and a gaseous state above the predetermined actuation temperature, the thermal fuse including an annular cylinder wall of the cylinder or a portion of the cylinder wall made of a fuse material having a melting point above the predetermined actuation temperature and the melting point being in a range between 786 and 1202 degrees Fahrenheit. - View Dependent Claims (7, 8, 9, 10)
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Specification