Rotating Element Balancing with Mobile Fluid Masses
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Solution Overview
Problem
Existing load balancing systems for rotating elements, such as rotor blades on helicopters, face limitations due to fixed counterweights that fail to adjust effectively with changes in the system, leading to inefficiencies and increased wear.
Innovation Solution
A load balancing system comprising hollow, close-ended cylinders filled with a weighted fluid, such as mercury, attached to rotor blades via universal fasteners that allow for adjustable positioning and responsiveness to unbalanced forces, ensuring effective counter-balancing without the need for substantial weights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed counterbalancing weights are used, then the balancing is effective for a single condition, but the balancing becomes ineffective when conditions change due to wear or other causes
Solution Approach 1:
The patent applies the dynamics principle by replacing fixed counterbalancing weights with mobile mass elements that can move freely within the rotating assembly. These mobile elements dynamically adjust their positions during rotation to automatically compensate for changing balance conditions, thereby maintaining balancing effectiveness without requiring manual adjustment or repositioning.
Solution Approach 2:
The mobile mass elements perform self-service by automatically migrating to optimal positions within the rotating assembly based on instantaneous balance requirements. This self-adjusting mechanism eliminates the need for external intervention or complex control systems, allowing the balancing system to adapt to changing conditions autonomously through the natural movement of the mobile mass elements.
2Force
If substantial weights are used to counter-balance forces, then the balancing force is sufficient, but the device complexity and weight increase
Solution Approach 1:
The patent utilizes the dynamics of rotating systems by positioning mobile mass elements at strategic locations within the rotating assembly. Through centrifugal force and rotational dynamics, these relatively light mobile elements generate sufficient counter-balancing forces when properly positioned, eliminating the need for substantial fixed weights while maintaining effective balance correction.
Solution Approach 2:
The system changes the parameter of mass distribution dynamically during rotation rather than relying on large static masses. By adjusting the radial and tangential positions of mobile mass elements during rotation, the system optimizes the counter-balancing force generation, achieving effective balancing with minimal total mass compared to traditional fixed weight systems.
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 system provides improved adjustability and responsiveness to unbalanced forces, reducing wear and tear on rotor systems by dynamically counteracting irregularities through the fluid's distribution within the cylinders, maintaining balance across varying conditions.
Implementation Method 1
When the system is at full rotation speed, the quantity of liquid in each tube will reach an equilibrium that counter-balances any irregularities in the system of rotating elements
Data Source
AI summary
A load balancing system for a system of rotating elements such as a helicopter rotor or an airplane propeller. The load balancing system includes two or more balancing tubes rotationally attached to blades or props on the system of rotating elements. The balancing tubes are slightly curved and enclose a hollow space containing a quantity of weighted fluid such as mercury. During operation of the system of rotating elements, the weighted fluid disperses throughout the hollow space in the balancing tubes so as to counter any imbalance in the system of rotating elements. Centrifugal forces will cause different dispersal of the weighted fluid throughout the hollow space depending on the overall pulling or pushing forces resulting from any imbalance.