Planetary Transmission Ring Gear Holder for Higher Load Transfer
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Solution Overview
Problem
Existing planetary transmissions in wind turbines face challenges in increasing mechanical power transfer while maintaining a compact size, improving service life, reducing maintenance, and minimizing noise generation.
Innovation Solution
A planetary transmission design featuring a ring gear holder with recesses for fastening means, such as hollow elements and screws, which provide a positive-fit and frictional engagement with the housing component, allowing for increased mechanical stress absorption and reduced relative movements, thereby enhancing stability and sealing while maintaining a compact size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional fastening means (screws alone) are used to connect the ring gear holder to the housing component, then the structure is simple, but the mechanical load-bearing capacity is insufficient and relative movements occur during operation
Solution Approach 1:
The patent combines two fastening mechanisms (positive-fit engagement via hollow element and frictional engagement via screw) into a single integrated fastening system. The hollow element provides immediate geometric constraint while the screw applies clamping force, creating a composite fastening solution that achieves superior load-bearing capacity without requiring separate mounting structures.
Solution Approach 2:
The fastening system uses composite fastening means comprising both a hollow element and a screw working together. This composite approach combines the advantages of form-fit connection (preventing displacement) with friction-based connection (absorbing mechanical stress), creating a fastening system with enhanced overall performance.
2Power
If the unit size is kept the same or reduced, then the compactness is improved, but the mechanical power transfer capacity is limited
Solution Approach 1:
The patent changes the fastening parameters by introducing dual fastening mechanisms that increase the contact area and distribution of mechanical stresses. This allows the transmission to handle higher power loads within the same volume by optimizing how forces are distributed through the fastening system, rather than increasing the overall size.
3Stability of the object's composition
If more fastening means are used to increase stability, then the relative displacement is reduced, but the installation space requirement increases
Solution Approach 1:
The hollow element is nested within the recess of the ring gear holder, with the screw passing through the hollow element. This nested arrangement allows both fastening components to occupy the same spatial envelope, maximizing connection stability without increasing the overall installation footprint.
4Reliability
If the number of fastening means is increased to improve sealing effect, then the sealing is enhanced, but the manufacturing complexity increases
Solution Approach 1:
The sealing function is segmented between the hollow element (which provides form-fit sealing) and the screw (which provides friction-based sealing through clamping force). This segmentation allows each component to contribute to sealing in a simple, manufacturable way without requiring complex integrated sealing structures.
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 design enables efficient use of space, increased mechanical load-bearing capacity, reduced wear, and noise reduction, allowing for higher shaft power transfer without size increase and improved sealing, leading to enhanced reliability and reduced maintenance.
Implementation Method 1
By means of the screw, in the assembled state a contact force is induced between the ring gear holder and the housing component, so that a friction force is induced in the region of contact between the ring gear holder and the housing component. The friction force also counteracts a relative displacement between the ring gear holder and the housing component
Implementation Method 2
By way of the hollow element, a positive-fit engagement is established between the ring gear holder and the housing component, which prevents a relative displacement between the ring gear holder and the housing component
Data Source
AI summary
A planetary transmission includes a ring gear holder and a ring gear for accommodating at least one planetary gear. The ring gear holder can be connected to a housing component at its end face, and a plurality of recesses for accommodating fastening means are embodied at an end face of the ring gear holder. Accommodated in at least one of the recesses is a hollow element, in which a fastening screw is accommodated. The hollow element establishes a positive-fit engagement between the ring gear holder and the housing component.