Connection structure for a generator assembly
A generator assembly includes a stator assembly coupled to an engine stator component of a propulsion engine, the stator assembly including: a stator support structure fixedly attached to the engine stator component; a stator disposed on a supporting surface of the stator support; a manifold coupled to the stator support, the manifold defining a connection volume and including at least one coolant opening at a connection end of the manifold; and an electrical connector extending between the stator and a connection device disposed on the connection end. The generator assembly also includes a rotor assembly comprising a rotor support structure connected to a shaft of the propulsion engine and a rotor attached to the rotor support structure, wherein the rotor rotates in conjunction with the shaft to generate a power signal that travels through the electrical connector to the connection device.
1. A propulsion engine, comprising:
a core portion generating exhaust that travels in an axial direction;
a turbine section coupled to a shaft, wherein the turbine section receives the exhaust and generates mechanical energy to rotate the shaft;
a turbine frame attached to the turbine section, the turbine frame comprising:
an outer casing coupled to the turbine section;
an inner hub supporting the shaft via a bearing assembly; and
a plurality of struts extending between the outer casing and the inner hub, wherein at least one strut of the plurality of struts defines an internal cavity having a cooling duct disposed therein; and
an electrical system comprising:
a generator assembly coupled to the shaft and to the inner hub via a generator coupler; and
an electrical connector line extending through the cooling duct and the generator coupler to an electrical coupler electrically coupled to the generator assembly, wherein the generator assembly comprises a manifold that includes a coolant opening to receive coolant from the cooling duct via the generator coupler, the manifold forming a radial wall that extends radially past the electrical coupler and the coolant opening is provided through the radial wall.
2. The propulsion engine of claim 1 , wherein the electrical system comprises a plurality of electrical connector lines including the electrical connector line extending through the cooling duct and the generator coupler to the connection device.
3. The propulsion engine of claim 1 , wherein at least two of the plurality of struts of the turbine rear frame define internal cavities having cooling ducts therein, wherein each of the internal cavities of the at least two of the plurality of struts include electrical connector lines including the electrical connector line extending therethrough to connect to the generator assembly.
4. The propulsion engine of claim 3 , wherein a first one of the electrical connector lines extends through a first one of the cooling ducts and through a first generator coupler in fluid communication with a first coolant opening in the manifold, wherein a second one of the electrical connector lines extends through a second one of the cooling ducts through a second generator coupler in fluid communication with a second coolant opening in the manifold.
5. The propulsion engine of claim 3 , wherein:
a first strut of the at least two of the plurality of struts defining a first internal cavity of the internal cavities having a first cooling duct of the cooling ducts therein that includes a power cable of the electrical connector lines extending therethrough, and
a second strut of the at least two of the plurality of struts defining a second internal cavity having a second cooling duct of the cooling ducts therein that includes a signal cable of the electrical connector lines extending therethrough.
6. The propulsion engine of claim 1 , wherein the generator assembly comprises:
a stator assembly coupled to the turbine frame via a bearing housing, the stator assembly comprising a stator support structure fixedly attached to the bearing housing, the stator support structure supporting the manifold; and
a rotor assembly comprising a rotor support structure connected to the shaft and a rotor attached to the rotor support structure such that the rotor assembly is disposed radially outward of the stator assembly.
7. The propulsion engine of claim 6 , wherein the rotor assembly is secured to the shaft via a connection such that the rotor assembly, stator support structure, and manifold are removable from the propulsion engine without removing any components of the propulsion engine that are disposed forward or radially outward of the generator assembly.
8. The propulsion engine of claim 6 , wherein the rotor assembly and the stator assembly are accessible for repair or replacement while the propulsion engine is installed on an aircraft.
9. The propulsion engine of claim 1 , further comprising:
a converter for converting a power signal generated by the generator assembly into a DC voltage, the converter conductively connected to the generator assembly via the electrical connector line; and
a main cooling duct in fluid communication with a coolant source, the main cooling duct extending at least partly between the converter and the turbine frame, wherein the electrical connector line extends through the main cooling duct into the cooling duct, wherein the electrical connector line is supported within the main cooling duct via a first support bracket and supported within the cooling duct via a second support bracket that is different than the first support bracket.