Variable-Stiffness Vibration Support for High-Load Collision Prevention
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Solution Overview
Problem
Existing vibration-damping support devices for wind turbine generators have constant stiffness, leading to large deformations and potential rigid collisions under high loads, and require complex additional structures for adjustable stiffness, increasing costs and space usage.
Innovation Solution
A vibration-damping support device with tapered elastic members embedded with metal skeletons, where the elastic rubber body bulges to contact the core shaft under load, increasing stiffness dynamically and reducing deformation, eliminating the need for additional stiffness adjustment devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If constant stiffness is used in vibration-damping support device, then结构简单 (structure is simple), but under high load the deformation becomes large causing rigid collisions and component damage
Solution Approach 1:
The patent applies the dynamics principle by making the stiffness of the elastic support device variable rather than constant. The elastic support includes a rubber elastic body with a through-hole that allows a rod to pass through, enabling the stiffness to change dynamically based on load conditions. Under normal loads, the device maintains low stiffness for good vibration damping, while under high loads, the stiffness increases sharply to prevent rigid collisions and protect components.
Solution Approach 2:
The patent applies parameter changes by modifying the stiffness parameter of the elastic support device. Through the structural design of the rubber elastic body with a through-hole and the rod passing through it, the stiffness parameter can be adjusted dynamically. This allows the device to adapt its mechanical properties to different operating conditions, transitioning from low stiffness during normal operation to high stiffness during overload conditions.
2Adaptability or versatility
If additional stiffness adjustment device is added, then variable stiffness can be achieved, but the structure becomes complicated and installation space increases
Solution Approach 1:
The patent applies the merging principle by integrating the stiffness adjustment function directly into the elastic support structure itself. The rod passing through the through-hole of the rubber elastic body combines the support function with the stiffness adjustment function in a single integrated component, eliminating the need for separate stiffness adjustment devices and reducing overall structural complexity.
Solution Approach 2:
The patent applies the self-service principle by designing the elastic support to automatically adjust its own stiffness based on the load conditions. The structural design allows the rubber elastic body to change its stiffness characteristics inherently through the interaction between the elastic body and the rod, without requiring external control systems or additional adjustment mechanisms.
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 device achieves variable stiffness, reducing dynamic deformation and ensuring safe operation by maintaining low stiffness under normal loads and sharply increasing stiffness under high loads, similar to 'emergency braking', thus protecting components and reducing vibration effectively.
Implementation Method 1
tapered elastic members embedded with metal skeletons, where the elastic rubber body bulges to contact the core shaft under load, increasing stiffness dynamically
Implementation Method 2
the vibration-damping support device can be varied, so as to provide, for example, better vibration damping effect
Data Source
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AI summary
A vibration-damping support device (500, 600), including a housing (510, 520), and a core shaft (530, 630) having one end passing through the housing (510, 520) to connect with a vibration source. The vibration-damping support device (500, 600) further includes two elastic members (550, 650) arranged within the housing (510, 520) and spaced apart from each other. Each elastic member (550, 650) includes an inner hole (55), so that it can be mounted on the core shaft (530, 630). Each elastic member (550, 650) includes an elastic rubber body (551, 651), and a plurality of metal plates (552, 652) that are embedded in the elastic rubber body (551, 651) and parallel to each other. The elastic rubber body (551, 651) extends beyond the metal plates (552, 652) in a radially outer direction. The elastic rubber body (551, 651) has a constant outer diameter, or has a minimized outer diameter at each of its axial ends and a maximized outer diameter at its axially central position. With this vibration-damping support device, a variable stiffness can be achieved.