Planetary Gear Ring Mount Fastening for Higher Wind Turbine Loads
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Solution Overview
Problem
Existing planetary gears in wind turbines face challenges in increasing mechanical power transmission while maintaining or reducing size, enhancing service life, reducing maintenance requirements, and minimizing noise, with a need for efficient and cost-effective solutions.
Innovation Solution
A planetary gear design featuring a ring gear mount with recesses for hollow elements and screws that create a form and friction fit with the housing component, allowing for increased mechanical stability, reduced relative movements, and improved sealing, while utilizing space efficiently to absorb higher shaft power and reduce noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional solid pins are used for connecting the ring gear housing to the housing component, then the connection provides structural support, but the installation space is wasted and the sealing effect is insufficient
Solution Approach 1:
The patent applies hollow pins instead of solid pins in the connection between the ring gear housing and the housing component. The hollow interior of the pins creates negative pressure that enhances the sealing effect, preventing gear oil from leaking through the connection points while utilizing the previously wasted installation space.
2Stability of the object's composition
If the number of fasteners is increased to improve connection stability, then the mechanical stability improves, but the installation space requirements increase
Solution Approach 1:
The patent changes the physical parameters of the fastening elements by using hollow pins with internal threading instead of solid pins. This allows the same connection stability to be achieved with fewer fasteners, as the hollow structure provides enhanced sealing and the threaded design ensures secure fastening within the limited installation space of the recesses.
3Power
If the planetary gear size is maintained while increasing shaft power, then the gearbox size remains compact, but the mechanical stresses increase
Solution Approach 1:
The hollow pins are designed to absorb and distribute the increased mechanical stresses that result from higher shaft power. The hollow structure with negative pressure creates a cushioning effect that helps manage the additional loads while maintaining the compact gearbox size, preventing stress concentration at the connection points.
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 design achieves higher mechanical stability, reduced wear, improved sealing, and noise reduction by distributing contact pressure evenly, enabling increased shaft power transmission with the same size and reducing maintenance needs.
Implementation Method 1
the screw generates a clamping force between the ring gear housing and the housing component, thus creating a frictional force in the area of contact between the ring gear housing and the housing component. This frictional force also counteracts any relative displacement
Implementation Method 2
The hollow element creates a positive fit between the ring gear housing and the housing component, preventing any relative displacement between the ring gear housing and the housing component
Data Source
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AI summary
The invention relates to a planetary transmission (10) which comprises a ring gear mount (16) and a ring gear (18) for receiving at least one planetary gear (50). The ring gear mount (16) can be connected to a housing component (20) at the end face, and a plurality of recesses (24) for receiving securing means (40, 42) is formed at the end face (30) of the ring gear mount (16). According to the invention, a hollow element (42) in which a screw (40) is received is received in at least one of the recesses (24). The invention also relates to a powertrain (60) for a wind turbine (70) which is equipped with a corresponding planetary transmission (10) and to a corresponding wind turbine (70).