Sun Gear and Spline Shaft Assembly With Distance Ring Load Sharing
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Solution Overview
Problem
The existing gearbox assembly structure for wind turbines experiences excessive axial force on the sun gear shaft, leading to accelerated wear and potential axial misalignment between the sun gear shaft and the spline shaft, resulting in gearbox damage.
Innovation Solution
An assembly structure that includes a sun gear shaft, a hollow spline shaft, a mechanical pump drive gear, and a distance ring, where the distance ring is securely connected to the mechanical pump drive gear and positioned to share axial forces, reducing wear and preventing misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the sun gear shaft is connected to the spline shaft through splines to achieve torque transmission, then the transmission function is improved, but the axial force causes wear between the sun gear shaft and the spline shaft to accelerate
Solution Approach 1:
A distance ring is introduced as an intermediary component between the sun gear shaft and the mechanical pump drive gear. The distance ring is securely connected to the mechanical pump drive gear while being spaced from the sun gear shaft, serving as a mediator that supports the sun gear shaft and distributes axial forces, thereby reducing direct wear between the sun gear shaft and the spline shaft.
Solution Approach 2:
The support function is segmented by introducing the distance ring as a separate component. Instead of relying solely on the spline connection between the sun gear shaft and spline shaft, the distance ring provides additional support functionality, dividing the load-bearing responsibilities and reducing wear on the original spline connection.
2Stability of the object's composition
If the sun gear shaft is designed as floating to balance load from multiple planetary gears, then load balance is improved, but micro-motion between the sun gear shaft and the spline shaft causes wear
Solution Approach 1:
The distance ring acts as an intermediary that reduces micro-motion between the sun gear shaft and the mechanical pump drive gear. By providing a stable reference point and reducing relative movement, the distance ring decreases wear while preserving the floating design's load-balancing capability.
3Productivity
If the sun gear shaft and spline shaft are disposed in parallel for torque transmission, then the transmission efficiency is improved, but excessive axial force causes axial misalignment and gearbox damage
Solution Approach 1:
The distance ring serves as a mediator that supports the sun gear shaft and distributes axial forces. This intermediary structure prevents excessive axial force from causing misalignment between the sun gear shaft and spline shaft, maintaining parallel alignment and transmission efficiency while preventing damage.
Solution Approach 2:
The distance ring provides beforehand cushioning by being positioned to receive and distribute axial forces before they can cause misalignment or damage. This preventive support structure cushions against excessive axial forces, maintaining proper alignment and preventing gearbox damage.
Data Source
AI summary
Provided is an assembly structure of sun gear shaft and spline shaft of a gearbox for wind turbine. The assembly structure relates to the technical field of gearboxes for wind turbine and includes a sun gear shaft, a spline shaft, a mechanical pump drive gear, and a distance ring. The spline shaft is a hollow shaft. One end of the sun gear shaft is inserted into the spline shaft. The one end of the sun gear shaft inserted into the spline shaft is connected to the spline shaft through a spline pair. The mechanical pump drive gear is mounted at one end of the spline shaft. The inner diameter of the mechanical pump drive gear is less than the inner diameter of the spline shaft. The distance ring is disposed in the spline shaft. One end of the distance ring abuts against the inner side of the mechanical pump drive gear and is securely connected to the mechanical pump drive gear. Another end of the distance ring is spaced from the one end of the sun gear shaft in the spline shaft.