Elevator Hanging Damper for Vibration Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Elevators experience vibrations and noise due to guide rail misalignments and dynamic unbalance, which affect ride comfort, especially at high speeds, as existing base isolation methods are not applicable due to the fixed coupling of elevator cars to guide rails at the top.
Innovation Solution
A hanging damper system is introduced to connect the elevator car body and sling, comprising a first part connected to the car body, a second part connected to the sling, and a damping element between them to attenuate vibrations, keeping the car straight and preventing resonances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If base isolation is used to protect against vibrations, then vibration isolation is improved, but it cannot be applied because the elevator car body is fixed to the guide rails at the top
Solution Approach 1:
The patent inverts the traditional base isolation concept by placing the isolation mechanism at the top of the elevator car body (where it is conventionally fixed) rather than at the bottom. The damping element is positioned between the top of the car body and the car sling, allowing vibration isolation to function despite the fixed coupling at the top to guide rails.
Solution Approach 2:
The patent introduces a damping element as an intermediary component between the elevator car body and the car sling. This damping element acts as a mediator that absorbs and dissipates vibrations, preventing them from being transmitted to the car body while still allowing the necessary mechanical connection and emergency braking functionality.
2Stability of the object's composition
If the top of the elevator car is fixed to support the car body, then structural stability is improved, but vibrations are transmitted to the car body
Solution Approach 1:
The damping element serves as an intermediary between the fixed top structure and the car sling, maintaining the structural stability provided by the fixed coupling while simultaneously filtering out vibrations. The intermediary absorbs harmful vibrational energy without compromising the structural support function.
Solution Approach 2:
The damping element represents a composite solution combining structural support and vibration damping functions in a single component. It integrates the mechanical support role (maintaining stability) with the vibration isolation role (reducing harmful factors) that would traditionally require separate systems.
3Object-affected harmful factors
If springs are used to isolate the floor from the car sling, then vibration isolation is improved, but the top fixing must be additionally supported which increases complexity
Solution Approach 1:
The patent merges the vibration isolation function and the top support function into a single integrated damping element. Instead of requiring separate springs for isolation and additional support structures, the damping element simultaneously provides both functions, reducing overall system complexity.
Solution Approach 2:
The damping element is designed as a multi-functional component that performs both vibration isolation and structural support roles. This universal component eliminates the need for separate dedicated support structures, simplifying the overall system architecture while achieving the desired vibration isolation performance.
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 hanging damper significantly reduces vibrations and noise from guide rail excitations, wind loads, and structural borne noise, improving ride comfort by isolating the elevator car body from vibrations and allowing easy installation and maintenance without disassembly.
Implementation Method 1
a damping element arranged between the first plate of the first part and the second plate of the second part such that the damping element has a connection with the first plate of the first part and the second plate of the second part
Data Source
AI summary
An elevator car arrangement includes an elevator car body and an elevator car sling. The elevator car arrangement further includes a hanging damper arranged to connect the elevator car body and the elevator car sling together for dampening vibrations coming from guide rails through the elevator car sling to the elevator car body. The hanging damper includes a first part connected to a bottom part of the elevator car body; a second part connected to the elevator car sling; and a damping element arranged to dampen vibrations coming from the second part to the first part. A method for dampening vibrations coming from guide rails through the elevator car sling to the elevator car body is disclosed.