Dual-Intermediate Gearbox Load Balancing With Oil-Damped Input Line
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Solution Overview
Problem
Current speed reducers with intermediate transmission lines in turbomachines often result in uneven power distribution between the lines, leading to imbalanced efforts on the input line, which can cause radial movement and affect the reduction ratio.
Innovation Solution
Incorporating load distribution means with rotating elements and oil damping at one end of the input line to allow radial movement and rebalance efforts between intermediate lines, ensuring equal couples and reduced mass while maintaining a controlled reduction ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If intermediate transmission lines are used in a speed reducer, then significant speed reduction is achieved in a confined space with controlled mass, but uneven power distribution occurs between the lines causing imbalanced efforts on the input line
Solution Approach 1:
The input line is made dynamically adjustable by allowing it to move radially through a bearing assembly. This dynamic positioning capability enables the input line to shift its location in response to uneven power distribution, thereby rebalancing the efforts on the intermediate transmission lines and improving reliability while maintaining the speed reduction function.
2Reliability
If the input line is made radially movable to rebalance efforts, then power distribution between intermediate lines is equalized, but additional components like bearings and damping mechanisms are required
Solution Approach 1:
A bearing assembly acts as an intermediary mechanism between the input line and the housing. This bearing assembly includes damping elements that mediate the radial movement of the input line, allowing the system to achieve power distribution balance while managing the complexity through a specialized intermediate component rather than multiple separate mechanisms.
Solution Approach 2:
The bearing assembly incorporates oil damping mechanisms to control the radial movement of the input line. This hydraulic damping approach provides smooth, controlled movement while dissipating energy, enabling the system to achieve balance without requiring complex mechanical guidance structures.
3Reliability
If oil damping is used to amortize radial displacements, then radial movement is controlled and efforts are equalized, but the device requires additional sealing and fluid management components
Solution Approach 1:
The bearing assembly merges multiple functions into a single integrated component: it provides radial support for the input line, incorporates oil damping to control radial movements, and includes sealing elements to manage the damping fluid. This consolidation reduces the number of separate components and simplifies the overall system architecture while achieving reliable radial movement control.
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 solution ensures balanced power distribution across intermediate lines, reducing the risk of dynamic excitation and improving reliability, mass efficiency, and design by equalizing efforts on the input line, thus achieving a stable and efficient speed reduction.
Implementation Method 1
means of oil damping of radial displacements from one opposite end of the input line
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
Speed reduction gearbox with two intermediate transmission lines, particularly for a turbomachine, comprising an input line (12) and an output line driven by the input line via said intermediate lines, these intermediate lines being substantially parallel, characterized in that it comprises means for apportioning load between said intermediate lines, these load apportioning means comprising swivelling means (30) for rotational coupling of one end of the input line, and oil-based damping means (40, 50) for damping the radial movements of an opposite end of the input line.