Wind Turbine Sun Shaft Flange Connection for Floating Shift Absorption
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Solution Overview
Problem
Existing wind turbine generators with double-feed asynchronous systems face issues of floating shift in the sun shaft, leading to friction and wear in flexible splines, requiring complex lubrication and cooling systems, which complicates the structure and increases maintenance costs.
Innovation Solution
A wind turbine generator parallel-stage intermediate-speed shaft train connecting structure using a thin-walled flange with elasticity to absorb floating shift, combined with rolling bearings and a rigid connection, eliminating the need for flexible splines and lubrication devices, and incorporating tapered roller bearings for improved stability and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flexible splines with gap between teeth are used to connect sun shaft and follower hollow shaft, then floating shift of sun shaft is absorbed, but friction occurs between spline teeth requiring complex lubrication and cooling devices
Solution Approach 1:
The patent changes the connection type from flexible splines with gaps to rigid splines without gaps, fundamentally altering the mechanical connection parameters. This eliminates the need for lubrication and cooling systems while maintaining floating shift absorption through the rigid connection structure itself
Solution Approach 2:
The patent extracts and removes the lubrication and cooling devices from the system by adopting a rigid spline connection that operates without friction and wear, thereby simplifying the overall device structure while maintaining the essential function of absorbing sun shaft floating shift
2Device complexity
If rigid connection is used between sun shaft and follower hollow shaft, then structure is simplified, but floating shift cannot be absorbed
Solution Approach 1:
The patent modifies the rigid connection by introducing adjustable positioning elements that can accommodate floating shift while maintaining the rigid connection's structural simplicity. The positioning elements can be adjusted to compensate for dimensional changes and floating shift without requiring complex flexible spline mechanisms
3Reliability
If flexible splines are used, then floating shift is absorbed, but manufacturing and maintenance costs increase due to hardening treatment and lubrication systems
Solution Approach 1:
The patent removes the need for hardening treatment and lubrication systems by using rigid splines without gaps that do not experience friction or wear. This extraction of unnecessary processing and maintenance requirements directly reduces manufacturing complexity and ongoing maintenance costs
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
Simplifies the transmission structure, reduces manufacturing and maintenance costs, and enhances stability and efficiency by eliminating friction and lubrication needs, facilitating miniaturization and easier maintenance.
Implementation Method 1
a thin-walled flange ring, the thin-walled flange ring having an elasticity and being fixedly connected to each of the sun shaft and the high-speed gear
Implementation Method 2
rolling bearings are provided between the downstream shaft portion and the high-speed gear to allow for rotation of the high-speed gear relative to the downstream shaft portion
Data Source
Figure 1~2
AI summary
A wind turbine generator parallel-stage intermediate-speed shaft train connecting structure, comprising a sun shaft (1), a downstream shaft portion, and a high-speed gear (4), wherein the high-speed gear (4) is arranged outside of the downstream shaft portion in an axial direction, an axial position of the downstream shaft portion is fixed relative to a wind turbine generator box (9), and the sun shaft (1) is connected to the high-speed gear (4) by a thin-walled flange ring to allow the thin-walled flange ring to absorb a floating shift of the sun shaft (1) by means of elastic deformation.