Resilient Mounting Plate for Rotor Hub Accessories
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Solution Overview
Problem
Conventional rotor systems with open hubs face challenges in load distribution due to the radial expansion and contraction of rotor blades, which can lead to excessive stress on components carried by the rotor hub, necessitating improved accessory mounting brackets for better load management.
Innovation Solution
A mounting plate with resilient members, including axial, radial, and arcuate segments, is designed to span the open end of the rotor hub, accommodating radial expansion and contraction while reducing shear forces and allowing for lighter construction by distributing loads effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional rigid mounting brackets are used to attach accessories to the rotor hub, then the mounting structure provides strong structural support, but the mounting structure transmits excessive shear loads and stress to the accessories during rotor hub expansion and contraction
Solution Approach 1:
The mounting bracket transitions from a rigid structure to a resilient structure by changing the physical state and mechanical properties of the material. The resilient members are designed to elastically deform under load, changing from a rigid connection to a flexible connection that absorbs shear forces through elastic deformation rather than transmitting them to the accessory.
Solution Approach 2:
The resilient members are pre-configured to provide cushioning against shear loads before the rotor hub expansion and contraction occurs. The elastic properties of the resilient members are designed to absorb and dissipate the shock and stress of hub movement, protecting the accessory from excessive forces before they can cause damage.
2Stability of the object's composition
If a rigid mounting plate is used to span the open end of the rotor hub, then the mounting plate provides stable attachment, but it cannot accommodate the radial expansion and contraction of the rotor hub during operation
Solution Approach 1:
The mounting bracket transitions from a static rigid structure to a dynamic resilient structure. The resilient members are designed to deform elastically in response to the dynamic expansion and contraction of the rotor hub, allowing the mounting structure to adapt to changing dimensional conditions while maintaining stable attachment of the accessory.
Solution Approach 2:
The resilient members function as flexible elastic elements that can stretch and compress to accommodate the changing diameter of the rotor hub. These flexible elements maintain the mounting connection while absorbing the dimensional changes through elastic deformation, preventing stress concentration and failure.
3Force
If heavier duty mounting brackets are used to handle the loads, then the load-bearing capacity increases, but the weight of the mounting system increases
Solution Approach 1:
The mounting bracket uses resilient members with optimized elastic properties to achieve high load-bearing capacity without increased weight. By selecting materials and geometries with appropriate elastic moduli and cross-sectional areas, the resilient members can absorb and distribute loads effectively while maintaining a lightweight construction compared to rigid overload-bracing structures.
Solution Approach 2:
The mounting bracket may utilize composite material construction or hybrid structures combining rigid and resilient elements. The resilient members can be made from high-strength elastomers or composite materials that provide exceptional strength-to-weight ratios, enabling the mounting system to handle heavy loads while minimizing overall weight compared to traditional rigid metal brackets.
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 shear load transmission and maintains a constant diametric dimension, allowing for a lighter and more efficient mounting system that can accommodate dynamic loads and vibrations, enhancing the structural integrity and operational stability of rotor systems.
Implementation Method 1
one or more resilient members coupling the mounting plate the annular base portion of the rotor hub to accommodate radially expansion and contraction of the annular base portion from loads exerted on the rotor hub by rotor blades
Data Source
AI summary
A rotor hub assembly includes an open rotor hub assembly with an open rotor hub and a mounting plate. The open rotor hub includes an annular base portion with periphery and a plurality of rotary member portions arranged about the annular base portion that each define an aperture for receiving a rotor blade. The mounting plate spans the annular base portion and is coupled to the annular base portion by a resilient member to accommodate radially expansion and contraction of the annular base portion according to loads exerted on the rotor hub by rotor blades seated in the apertures of the rotary member portions.