Bimetallic Spring Valve for Turbine Cooling Airflow Control

The patent applies a thermally driven spring valve that dynamically adjusts the coolant flow area based on temperature conditions. The valve transitions from a static flow restriction to a dynamic control mechanism that responds to thermal conditions, allowing the system to optimize coolant flow in real-time rather than maintaining a fixed conservative setting throughout all operating conditions.

The invention changes the flow area parameter dynamically through temperature-dependent actuation of the spring valve. As temperature increases, the valve opens to increase coolant flow; as temperature decreases, the valve closes to reduce flow. This parameter change allows the system to adapt coolant flow to actual thermal demands, resolving the contradiction between ensuring adequate cooling at maximum temperature and minimizing energy loss during normal operation.

The spring valve is thermally driven, meaning it uses the thermal energy already present in the system to actuate itself. The valve responds automatically to temperature changes without requiring external control systems, sensors, or power sources. This self-service approach allows dynamic flow control while minimizing the addition of complex external control mechanisms.

The invention replaces potential complex mechanical or electronic control systems with a thermally actuated spring mechanism. The thermal energy directly drives the spring valve to open or close, substituting what could have been a complex controlled system with a simpler passive thermal-mechanical response that achieves the same flow regulation function.