Serial Fan Vibration Isolation via Damping Element

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Solution Overview

Problem

Serially-connected fans experience severe resonant effects and noise due to vibration, leading to premature fatigue, reduced system reliability, and shortened lifespan, as the interaction of fundamental frequencies from multiple rotating fan rotors causes critical vibration and noise.

Innovation Solution

A shock-absorbent structure is introduced, where a flexible damping element is placed between the fan frames to absorb and isolate the fundamental frequencies of vibration, preventing the interaction of vibration amplitudes and reducing resonant effects and noise.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If two or more fan frames are serially connected to increase wind capacity and static pressure, then system performance is improved, but severe resonant effect and vibration occur due to interaction of fundamental frequencies

Engineering Contradiction:

Improvewind capacityVSAvoidresonant effect

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

A shock-absorbent element is introduced as an intermediary component between the fan frames to isolate and dampen the resonant vibrations. This mediator absorbs the harmful vibrational energy while allowing the fan frames to remain serially connected for maintaining wind capacity and static pressure performance.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The shock-absorbent element converts the harmful resonant vibrations into beneficial damping effects. By strategically placing damping materials at critical locations, the harmful vibrational energy is transformed into heat through internal friction, thereby reducing the resonant effect while maintaining system performance.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Device complexity

If fan frames are directly contacted and serially integrated to reduce device complexity, then structure is simplified, but vibration amplitude interaction and noise increase

Engineering Contradiction:

ImprovestructureVSAvoidnoise

Core Design Contradiction:

Device complexityVSObject-generated harmful factors

Solution Approach 1:

The shock-absorbent element serves as a mediator between directly contacted fan frames, maintaining the simple serial integration structure while introducing vibration isolation. This allows the structure to remain simple and easy to manufacture while effectively reducing noise and vibration amplitude interaction.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If multiple fan rotors rotate simultaneously to increase productivity, then wind capacity increases, but fundamental frequency interaction causes severe vibration and reduces reliability

Engineering Contradiction:

Improvewind capacityVSAvoidsystem reliability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The shock-absorbent elements convert the harmful vibrational interactions from simultaneously rotating fan rotors into beneficial damping effects. By placing these elements at critical locations where vibration transmission occurs, the harmful resonant frequencies are dampened while the fan rotors continue to operate simultaneously for maintaining high wind capacity and productivity.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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-absorbent structure effectively reduces vibration speed and acceleration by 63% and 48% respectively, preventing resonant effects and noise, thereby maintaining system performance and extending its lifespan.

Implementation Method 1

a shock-absorbent element is disposed between two surfaces of the fan frames of the serially-connected fans where are bonded, and the shock-absorbent element shall be made of a flexible material being shock-absorbent and damping to vibration

Methodology Applied

Scientific EffectVibration damping: Damping

Implementation Method 2

the shock-absorbent feature of the shock-absorbent element is applied to lower the fundamental frequencies of the two fan rotors and to damp and absorb the vibration amplitude thereof

Methodology Applied

Scientific EffectShock absorption: Shock Hardening

Data Source

PatentUS7465151B2Shock-absorbent structure of serially-connected fans

Publication Date: 2008.12.16 SUNONWEALTH ELECTRIC MACHINE IND CO LTD

AI summary

The present invention relates to a shock-absorbent structure of serially-connected fans. The serially-connected fans at least include two fan frames. A shock-absorbent element is disposed between the bonded surfaces of the fan frames and is made of a flexible material being shock-absorbent and damping. Therefore, when the fan rotor inside the fan frame rotates, the fundamental frequencies of two fan rotors are damped, and absorbed by the shock-absorbent element, thereby preventing the interaction of the fundamental frequencies from generating severe resonant effect and noise out of vibration and maintaining the optimized efficacy and the life span of the system.