Turbine engine component and method of making the same

Patent · Tue Mar 01 00:00:00 EST 1988

OSTI ID:5137726

Blazek, W S; Hasch, J L

A method of making turbine engine component is described having airfoils disposed in annular array between inner and outer shroud rings. The method comprises the steps of positioning airfoils having leading and trailing edge portions extending between inner and outer end portions of the airfoils in an annular array with outer end portions of the airfoils at least partially embedded in an outer shroud ring formed of wax and with inner end portions of the airfoils at least partially embedded in an inner shroud ring formed of wax, covering the airfoils and wax shroud rings with ceramic mold material to form a mold, removing the wax material of the shroud rings from the mold to leave inner and outer shroud ring mold cavities having configurations corresponding to the configurations of the wax shroud rings. The inner and outer end portions of the airfoils are at least partially disposed in the shroud ring mold cavities, filling the inner and outer shroud ring mold cavities with molten metal, the step of filling the inner and outer shroud ring mold cavities with molten metal including the steps of at least partially enclosing the inner end portions of the airfoils with a first annular body of molten metal having a configuration corresponding to the configuration of the inner shroud ring and at least partially enclosing the outer end portions of the airfoils with a second annular body of molten metal having a configuration corresponding to the configuration of the outer shroud ring, holding the airfoils in a predetermined spatial relationship with the inner and outer shroud ring mold cavities during filling of the shroud ring mold cavities with molten metal by engaging the airfoils with the ceramic mold material, and solidifying the molten metal in the inner and outer shroud ring mold cavities to form the inner and outer shroud rings.

• Assignee: TRW Inc., Cleveland, OH
• Patent Number(s): US 4728258
• OSTI ID: 5137726
• Resource Relation: Patent File Date: Filed date 25 Apr 1985
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
AIRFOILS
DESIGN
FABRICATION
GAS TURBINE ENGINES
AERODYNAMICS
METALS
OPERATION
RINGS
SLEEVES
SOLIDIFICATION
TURBINE BLADES
ELEMENTS
ENGINES
FLUID MECHANICS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MECHANICS
PHASE TRANSFORMATIONS
330103* - Internal Combustion Engines- Turbine