Slip Ring Torque Coupling for Wind Turbine Alignment Tolerance

The torque transmission system employs a dynamic connection that allows controlled movement in axial and radial directions while maintaining tangential position. This is achieved through a coupling mechanism that provides degrees of freedom in non-critical directions (axial and radial) while constraining the tangential direction to prevent relative displacement that would affect encoder accuracy and torque transmission reliability.

The invention extracts and eliminates the root cause of signal distortion by preventing tangential displacement through the constrained coupling mechanism. By removing the source of the problem (relative tangential movement between encoder and rotor), the system achieves reliable position and speed signals without requiring additional redundant sensors or complex signal correction systems.

The coupling mechanism implements local quality by applying different constraint characteristics to different directions: it provides degrees of freedom in axial and radial directions to accommodate tolerances and bearing displacements, while simultaneously applying strict constraints in the tangential direction to maintain encoder alignment accuracy. This directional differentiation resolves the contradiction between adaptability and measurement precision.