Turbomachine drive arrangement

摘要

An example arrangement for driving a turbomachine includes an input shaft that is configured to rotate a rotor of the turbomachine through a hydraulic log and gear differential rotatable coupled to the input shaft. A motor-generator is rotatably coupled to the differential. The motor-generator has a motor mode of operation and a generator mode of operation. The motor-generator is configured to drive the input shaft through the hydraulic log and differential when the motor-generator is in the motor mode of operation. The input shaft is configured to drive the motor-generator through the hydraulic log and differential when the motor-generator is in the generator mode of operation.

主权项

1. A hydraulic log valve assembly, comprising:
a valve that controls a flow of fluid within a hydraulic log to provide a rotational output from the hydraulic log that is different than a rotational input to the hydraulic log, the hydraulic log including a first wobbler plate to adjust a stroke of a first plurality of pistons, and a second wobbler plate to adjust a stroke of a second plurality of pistons, at least one of the first wobbler plate and the second wobbler plate adjustable from a first position where a portion of the first wobbler plate or second wobbler plate is tilted to a first side of a radial axis and a second position where the portion is tilted to an opposite second side of the radial axis, wherein the valve adjusts to control the flow of fluid between a higher pressure area of the hydraulic log and a lower pressure area of the hydraulic log, the first wobbler plate and the second wobbler plate adjusted independently from the valve; and a port plate, the first wobbler plate disposed on a first side of the port plate, the second wobbler plate disposed on an opposing second side of the port plate, the port plate having a first opening to permit flow from the first side to the second side, and a second opening to permit flow from the second side to the first side, wherein the first opening is in a higher pressure area of the hydraulic log and the second opening is in a lower pressure area of the hydraulic log, wherein the valve selectively permits flow from the higher pressure area to the lower pressure area.