Planet Carrier Sleeve Structure for Gear Meshing Deformation
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Solution Overview
Problem
Existing planet carriers in wind power transmissions experience significant deformation and mechanical stress, leading to inefficiencies in power transmission due to non-negligible deformation of the planet carrier and planet wheel toothing.
Innovation Solution
A flexible sleeve with a sliding layer is integrated between the planet wheel and the planet axle, allowing for deformation compensation and stress reduction, while minimizing installation space through a conical axial portion and flexible attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the planet carrier is designed to be rigid for structural stability, then strength is improved, but deformation under mechanical stress increases leading to meshing inefficiencies
Solution Approach 1:
The planet axle is designed with a conical deformation zone that allows controlled elastic deformation under load. This dynamic adaptation enables the rigid planet carrier structure to compensate for deformations in the planet wheel toothing, maintaining meshing reliability while preserving structural strength.
Solution Approach 2:
The conical portion of the planet axle changes its effective geometry under mechanical stress, allowing the diameter to vary in a controlled manner. This parameter change enables the system to adapt to deformation conditions while maintaining overall structural integrity and meshing precision.
2Reliability
If a flexible mounting is used for the planet axle to compensate deformations, then meshing reliability is improved, but installation space increases
Solution Approach 1:
The planet axle is segmented into a rigid portion and a conical deformation zone. This segmentation allows the flexible compensation function to be localized in a small conical region, maintaining meshing reliability while minimizing the overall volume required for the flexible mounting mechanism.
Solution Approach 2:
The conical portion acts as a flexible element with thin-walled characteristics, allowing deformation compensation through elastic bending. This flexible zone provides the necessary adaptability for meshing reliability while occupying minimal installation space compared to traditional flexible mounting mechanisms.
3Volume of moving object
If the planet axle is rigidly fixed to minimize installation space, then volume is reduced, but stress peaks increase under mechanical load
Solution Approach 1:
The conical deformation zone is designed in advance to absorb and distribute mechanical stresses before they can concentrate into peaks. This beforehand cushioning effect occurs through controlled elastic deformation in the conical region, reducing stress peaks while maintaining compact dimensions.
Solution Approach 2:
The conical portion provides dynamic stress distribution through its geometric characteristics. Under load, the varying cross-section allows stress to be distributed along the conical surface rather than concentrated at a single point, reducing peak stresses while maintaining a compact rigid-like structure.
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
The solution effectively reduces stress peaks and compensates for deformations in the planet wheel toothing, enhancing mechanical flexibility and reducing installation space requirements.
Implementation Method 1
a sliding layer is arranged between the sleeve on the one hand and the planet wheel on the other hand
Implementation Method 2
the sleeve is made of a flexible material
Data Source
AI summary
A planet carrier for a transmission, in particular for a wind power transmission, can hold a planet axle on which a planet wheel is mounted, wherein a sleeve is arranged in radial direction between the planet axle and the planet wheel. In order to be able to compensate irregularities in the toothing of the planet wheel and still require as little installation space as possible for the planet carrier a sliding layer is arranged between the sleeve on the one hand and the planet wheel on the other hand.