초록 ▼

The blades of a gas turbine are primarily cooled by the circulation of a coolant through the hollow interiors thereof by the thermosiphon principle. Each hollow blade interior is also placed in fluid communication with a secondary coolant source, but secondary coolant flow is precluded by a plug fil

The blades of a gas turbine are primarily cooled by the circulation of a coolant through the hollow interiors thereof by the thermosiphon principle. Each hollow blade interior is also placed in fluid communication with a secondary coolant source, but secondary coolant flow is precluded by a plug filling the inlet fluid passage. Similar plugs fill apertures in the form of casting holes through each blade airfoil portion, the holes serving to discharge the secondary coolant from the blade interior. The plugs are fabricated of a material having a lower melting point temperature than that of the remainder of the blade airfoil portion such that, in the event of failure in the primary cooling system, the plugs will melt, thereby permitting the secondary coolant to rush through the blade and provide internal cooling thereof.

대표청구항 ▼

A turbine comprising a rotor disk bearing a plurality of turbine blades, each blade having an airfoil portion defining a hollow interior and having a given melting point temperature; a closed-loop coolant system in fluid communication with the hollow blade interiors and providing the primary cooling

A turbine comprising a rotor disk bearing a plurality of turbine blades, each blade having an airfoil portion defining a hollow interior and having a given melting point temperature; a closed-loop coolant system in fluid communication with the hollow blade interiors and providing the primary cooling therefor; a secondary coolant supply; means for fluidly communicating between said secondary coolant supply and the hollow blade interiors; a first filling means disposed within said fluid communicating means; means defining holes through said airfoil portions for the discharge of the secondary coolant; and a second filling means disposed within said holes; and wherein said first and second filling means have a melting point temperature less than that of said airfoil portions.