Elastic Bushing for Planetary Bearing Vibration Damping
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Solution Overview
Problem
Conventional planetary gears and bearings lack effective damping mechanisms, leading to misalignment and uneven load distribution due to torsional twisting and bending moments, resulting in undesirable vibrations and uneven wear.
Innovation Solution
A preloadable elastic bushing with an elastic layer and a spacer sleeve, featuring slots and channels that allow for uniform prestressing and lubrication, providing a homogeneous bearing surface and damping effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional planetary bearings are used without damping mechanisms, then the structure is simple and easy to manufacture, but misalignment and uneven load distribution occur due to torsional twisting and bending moments
Solution Approach 1:
The patent introduces an elastic element between the planetary bearing and the planetary gear that preemptively absorbs torsional and bending moments before they can cause misalignment. This cushioning element is pre-installed and continuously active, preventing rather than reacting to alignment issues, thus solving the contradiction by maintaining reliability without complicating the manufacturing process.
Solution Approach 2:
The patent employs a composite structure combining rigid bearing components with elastic damping material. This composite approach allows the system to maintain the simplicity of conventional bearings while incorporating the load-distributing benefits of elastic materials, resolving the contradiction between manufacturing ease and load distribution uniformity.
2Reliability
If damping devices are added to planetary gears, then vibrations and misalignment are reduced, but the device complexity increases
Solution Approach 1:
The patent merges the damping function directly into the existing bearing structure by integrating an elastic element between the bearing and the planetary gear. This eliminates the need for separate damping devices, achieving vibration reduction while maintaining device simplicity. The damping function is combined with the mounting structure rather than being added as a separate component.
Solution Approach 2:
The patent uses a flexible elastic element (such as an elastomeric layer or flexible ring) as the damping component. This flexible element provides vibration damping through its material properties without requiring complex mechanical structures, thus achieving reliability improvement with minimal increase in device complexity.
3Stability of the object's composition
If planets are mounted rigidly on their axes, then the structure is stable, but unequal wear occurs due to misalignment from torsional twisting
Solution Approach 1:
The elastic element is installed beforehand between the planetary bearing and the planetary gear to cushion against misalignment forces before they cause wear. This preemptive cushioning maintains stable planet mounting while preventing the unequal wear that would otherwise occur, thus extending bearing service life without compromising mounting stability.
4Reliability
If the bearing is made softer to allow planet alignment, then misalignment is reduced, but the bearing strength decreases
Solution Approach 1:
The patent applies local quality by making only the mounting interface between the bearing and planetary gear elastic, while keeping the bearing itself rigid and strong. The elastic element is localized to where alignment flexibility is needed, allowing the bearing to maintain its full load-carrying capacity while still permitting the necessary alignment adjustments through the elastic mounting.
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 vibrations and misalignment, ensuring uniform load distribution and extended wear resistance by creating a homogeneous, elastic mounting system that compensates for torsional and bending stresses.
Implementation Method 1
an elastic layer (4) which connects the outer cylindrical body (8) and the inner cylindrical body (7) to one another
Implementation Method 2
a pressure medium (13) is supplied via lines (12), from where the pressure medium (13) is pressed into the displacement space (9), so that the elastic layer (s) (4) is (are) compressed
Implementation Method 3
Lubricant (18) for the wheels of the gear can be supplied via such an opening (19)
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The invention relates to an elastic bushing that has a novel damping system as a result of corresponding structural measures and arrangements, for the purpose of eliminating or reducing unwanted vibrations in planetary bearings, particularly planetary gears for planetary gearboxes. The invention also particularly relates to the use of such bushings, planetary gears or planetary gearboxes in machine parts and installations that only transmit low or zero torque, such as in wind turbines.