Shock Absorber for High-Voltage Devices Using Threaded Rotational Decoupling
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Solution Overview
Problem
High-voltage devices are vulnerable to damage from seismic excitations such as earthquakes due to their shape, mass, and materials, and existing shock absorbers are inadequate in effectively protecting these devices from such vibrations.
Innovation Solution
A shock absorber arrangement featuring a rod element with an external thread, a rotary element with an internal thread, and a carrier element decoupled from the rotary element via roller bearings, along with helical springs to absorb seismic energy through friction and rotational decoupling, providing stable support to high-voltage devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional shock absorbers are used for high-voltage devices, then the devices are vulnerable to damage from seismic excitations, but adding complex protection systems increases device complexity
Solution Approach 1:
The patent combines multiple protective functions into a single integrated shock absorber unit. The rod element, rotation element, and support element work together as one compact system that simultaneously provides vibration damping, shock absorption, and structural support, eliminating the need for multiple separate protection devices
Solution Approach 2:
The shock absorber employs dynamic elements including a rotation element that can rotate about the longitudinal axis, spring elements that can compress and extend, and a damper that provides variable resistance. These dynamic components adapt to different seismic conditions, providing effective protection across a range of vibration frequencies and intensities
2Stability of the object's composition
If spring elements are used to dampen vibrations, then vibration damping is improved, but the system becomes less effective against high-impact seismic events
Solution Approach 1:
The shock absorber divides the protection function into multiple independent elements: spring elements for vibration damping, a damper for shock absorption, and a rotation element for energy dissipation. Each element handles specific aspects of seismic protection, allowing the system to effectively manage both low-amplitude vibrations and high-impact events simultaneously
Solution Approach 2:
The system combines different mechanical elements with complementary characteristics - elastic springs for energy storage and vibration isolation, viscous dampers for energy dissipation, and friction-based rotation mechanisms for additional damping. This composite approach creates a multi-functional protection system that addresses various seismic threat types
3Device complexity
If the rotation element is directly connected to the support element, then the structure is simpler, but seismic energy is not effectively dissipated
Solution Approach 1:
The patent introduces a damper as an intermediary element between the rotation element and the support element. This damper provides controlled resistance to the motion, converting kinetic energy from seismic events into heat energy that is dissipated, thereby enhancing energy dissipation while maintaining structural integrity
Solution Approach 2:
The rotation element converts harmful linear seismic vibrations into rotational motion through threaded engagement with the rod element. This rotational motion is then dissipated through friction and the damper, transforming the harmful vibrational energy into harmless thermal energy that is safely dissipated
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 shock absorber effectively dampens seismic excitations by converting translational energy into rotational energy and utilizing restoring forces to counteract deflections, thereby protecting high-voltage devices from damage.
Implementation Method 1
the support element is mounted on the rotation element by at least one rolling bearing extending about the longitudinal axis. The at least one rolling bearing decouples rotations of the rotation element about the longitudinal axis from the support element
Implementation Method 2
Each return element is designed as a helical spring extending around a section of the rod element, the helical axis of which runs parallel to the longitudinal axis of the rod element. When the rotation element is deflected from an equilibrium position relative to the rod element along its longitudinal axis, the helical spring exerts a return force on the rotation element that counteracts the deflection
Implementation Method 3
Translations of the rod element along its longitudinal axis, caused by the seismic excitations, induce rotations of the rotating element about its longitudinal axis, resulting in friction between the rod element and the rotating element of the shock absorber. This friction and the rotation of the rotating element absorb energy from the translations and dampen the effect of the seismic excitations on the support element
Data Source
Figure 1~2
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AI summary
The invention relates to a shock absorber (1) for a high-voltage device. The shock absorber (1) comprises a rod element (5) having an outer thread (19) running about a longitudinal axis (17) of the rod element (5), two holders (7, 8) which support the rod element (5), a rotational element (9) which runs like a ring about the rod element (5) and has an inner thread (21) engaging into the outer thread (19), and a carrier element (3) which is mounted on the rotational element (9) in such a way that rotations of the rotational element (9) about the longitudinal axis (17) decouple from the carrier element (3).