Electric Motor Damping Structure for Tangential Vibration Isolation
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Solution Overview
Problem
Existing solutions for damping tangential vibrations in electric motors of airflow generating apparatuses are inefficient, leading to unwanted noise and potential damage due to insufficient or excessive rigidity, which amplifies noise and vibrational contact with adjacent elements.
Innovation Solution
The use of damping means comprising a first and second part with elastically deformable damping elements made of elastomer material, such as gum or rubber, to absorb tangential vibrations and prevent radial movement, while allowing for smooth tangential movement, using threaded attachments for fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an elastically deformable element is used as an intermediate element between the electric motor and the structural element, then tangential vibrations are absorbed and bending is minimized, but the electric motor cannot be radially held with sufficient strength and rigidity
Solution Approach 1:
The damping element is segmented into multiple radial zones with different stiffness characteristics. The inner radial zone has higher stiffness to provide radial holding strength, while the outer radial zone has lower stiffness to absorb tangential vibrations. This segmentation allows the single damping element to simultaneously satisfy both radial support and vibration damping requirements.
Solution Approach 2:
Different regions of the damping element are assigned different local mechanical properties. The portion near the motor mounting interface is designed with higher radial stiffness to prevent excessive radial displacement, while the portion extending toward the blade assembly has increased tangential compliance to absorb vibrations. This local differentiation resolves the contradiction between radial strength and vibration absorption.
2Stability of the object's composition
If the electric motor is held excessively rigidly, then radial stability is improved, but tangential or rotational movement is transmitted to adjacent elements causing noise
Solution Approach 1:
The damping element introduces dynamic compliance to the motor mounting system. Rather than rigid fixation, the elastically deformable material allows controlled tangential and rotational movements of the motor, absorbing vibrational energy through elastic deformation. This dynamic approach prevents vibration transmission to adjacent elements while maintaining adequate radial positioning stability.
3Object-affected harmful factors
If the electric motor is held insufficiently, then tangential vibration absorption is improved, but the blades contact the side walls causing damage and noise
Solution Approach 1:
The damping element's functionality is extended from single-direction vibration isolation to multi-dimensional control. By designing the element with anisotropic stiffness characteristics - compliant in tangential directions for vibration absorption, but sufficiently rigid in radial directions - it simultaneously prevents excessive motor displacement that would cause blade contact while absorbing tangential vibrations through elastic deformation in perpendicular directions.
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
Effectively absorbs tangential vibrations and prevents radial movement, reducing noise and damage by providing optimal rigidity for electric motors, ensuring quiet operation and structural integrity.
Implementation Method 1
a damping element which is elastically deformable and has a longitudinal extension
Implementation Method 2
absorbing tangential vibrations and minimizing the bending or drop of the front longitudinal end
Data Source
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AI summary
The present invention relates to damping means of an electric motor of an airflow generating apparatus and said apparatus comprising these means, said means comprising a first part (1'), a second part (2'), and a damping element (3), the damping element (3) being arranged such that it determines an attachment between the first part (1') and the second part (2'), and comprising at least one central wall (3.1) having two longitudinal ends (3.A). At least one of the two longitudinal ends (3.A) of the at least one central wall (3.1) is defined to form an angle with respect to the first part (1') such that an imaginary transverse surface containing the at least one of the two longitudinal ends (3.A) can be defined parallel to an imaginary joining line (A) between a center of masses (CM) of the at least one central wall (3.1) and a center of gravity (G) of the electric motor (M).