Direct Hub Shaft Connection Eliminates Coupler in Wind Turbines
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Solution Overview
Problem
Conventional wind power generation systems face issues with increased complexity, weight, and risk of slipping at the connecting surface between the rotary main shaft and the elastic coupler, leading to reliability concerns.
Innovation Solution
A wind power generation system with a direct connection between the rotary main shaft and the hub, utilizing a bell-mouth shaped rotary main shaft that allows for local deformation to accommodate misalignment and reduce bending stress and vibration, eliminating the need for an elastic coupler and its associated components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If an elastic coupler is used to connect the rotary main shaft and hub, then bending stress and vibration are alleviated, but the number of components increases and connecting work time increases
Solution Approach 1:
The patent removes the elastic coupler from the system entirely, extracting this intermediate component that caused complexity. The rotary main shaft is connected directly to the hub, eliminating the need for separate coupling components while maintaining the essential function of power transmission and stress alleviation.
Solution Approach 2:
The patent merges the connection function into a single integrated joint between the rotary main shaft and hub, eliminating the need for separate elastic coupler components. This consolidation reduces the number of parts while maintaining structural integrity and stress distribution.
2Stability of the object's composition
If an elastic coupler is used to connect the rotary main shaft and hub, then bending stress and vibration are alleviated, but the weight of the elastic coupler increases
Solution Approach 1:
The patent removes the elastic coupler from the system entirely, extracting this intermediate component that caused complexity. The rotary main shaft is connected directly to the hub, eliminating the need for separate coupling components while maintaining the essential function of power transmission and stress alleviation.
3Stability of the object's composition
If an elastic coupler is used to connect the rotary main shaft and hub, then bending stress and vibration are alleviated, but the weight of the frame covering the rotary main shaft increases
Solution Approach 1:
The patent removes the elastic coupler from the system entirely, extracting this intermediate component that caused complexity. The rotary main shaft is connected directly to the hub, eliminating the need for separate coupling components while maintaining the essential function of power transmission and stress alleviation.
4Reliability
If the connecting surface between the rotary main shaft and elastic coupler is designed with high holding force, then slipping is prevented, but the complexity of the connecting portion increases
Solution Approach 1:
The patent removes the elastic coupler from the system entirely, extracting this intermediate component that caused complexity. The rotary main shaft is connected directly to the hub, eliminating the need for separate coupling components while maintaining the essential function of power transmission and stress alleviation.
5Reliability
If the connecting surface between the rotary main shaft and elastic coupler is designed with high holding force, then slipping is prevented, but the time for connecting work increases
Solution Approach 1:
The patent removes the elastic coupler from the system entirely, extracting this intermediate component that caused complexity. The rotary main shaft is connected directly to the hub, eliminating the need for separate coupling components while maintaining the essential function of power transmission and stress alleviation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances reliability by reducing weight, simplifying assembly, and eliminating the risk of slipping, while maintaining the ability to alleviate bending stress and vibration, thus providing a more efficient and reliable power generation system.
Implementation Method 1
a bell-mouth shaped rotary main shaft that allows for local deformation to accommodate misalignment and reduce bending stress and vibration
Data Source
AI summary
A wind power generation system according to the invention includes: blades configured to receive wind to rotate; a nacelle supporting a load from the blades; a tower supporting the nacelle; a hub supporting the blades and configured to be rotated with the blades; a rotary main shaft configured to be rotated with the rotation of the hub; a gearbox connected to the rotary main shaft and configured to increase a speed of the rotation; and a generator configured to be driven at the rotation speed increased by the gearbox. The rotary main shaft is connected directly to the hub.