Passive Variable Geometry Turbine Blade Pitch Control

The patent applies the dynamics principle by making the pitch angle variable instead of fixed. The blade pitch angle dynamically adjusts during operation - starting at a maximum angle for self-starting and gradually reducing to zero at full speed. This dynamic adjustment resolves the contradiction by enabling both simple structure (passive adjustment without external actuators) and high power output (optimized pitch angles throughout operation).

The patent changes the pitch angle parameter from a constant value to a variable parameter that changes with rotational speed. The pitch angle transitions from maximum at startup to zero at full speed, optimizing the lift-based performance across the entire operational range. This parameter change enables the turbine to maintain high efficiency while avoiding the complexity of active control systems.

The patent applies self-service by designing a passive pitch adjustment mechanism that uses the turbine's own rotational motion and fluid dynamic forces to vary the pitch angle. The mechanism automatically transitions from maximum pitch at startup to zero pitch at full speed without external energy sources or active control systems. This self-service approach improves energy efficiency while keeping the mechanism relatively simple by leveraging the system's inherent dynamics.

The dynamic pitch adjustment mechanism exploits the relationship between rotational speed and optimal pitch angle. As the turbine accelerates, the pitch angle naturally reduces through passive mechanical means, optimizing performance across the speed range without requiring external energy input or complex active control systems.

The passive pitch adjustment system serves itself by using the turbine's rotational dynamics and fluid forces to automatically optimize the pitch angle throughout operation. This self-regulating mechanism maximizes energy extraction efficiency without requiring external energy sources, sensors, or active control systems, thereby avoiding significant increases in device complexity.

The patent changes the pitch angle parameter dynamically based on rotational speed, transitioning from maximum at startup to zero at full speed. This parameter change optimizes the lift-based performance and energy extraction efficiency across the entire operational range while using passive mechanical means rather than complex active control systems.

The patent applies preliminary action by setting the pitch angle to maximum at the start of operation to ensure reliable self-starting capability. As the turbine accelerates and reaches higher speeds, the pitch angle is gradually reduced to zero, optimizing efficiency at high speeds. This staged approach to pitch angle adjustment resolves the contradiction between self-starting reliability and high-speed efficiency.

The dynamic pitch adjustment enables the system to adapt to different operational phases - maintaining maximum pitch for self-starting and transitioning to zero pitch for high-speed efficiency. This dynamic behavior allows the turbine to optimize performance across the entire speed range without compromising self-starting capability.