Dryer Drum Two-Layer Insulation for Noise and Vibration Damping
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Solution Overview
Problem
Existing tumble dryer drums lack optimal noise reduction and mechanical protection against vibrations, leading to subpar soundproofing and potential damage during operation.
Innovation Solution
A drum with an insulating element comprising two layers: a vibration-absorbing first layer, such as a flexible mat or porous foam, and a stretchable second layer made of elastomer or silicone, which is pre-stretched to hold the first layer in place without adhesives, ensuring effective soundproofing and vibration damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a single-layer elastic damping element is used, then the drum shell is protected mechanically, but the sound insulation is not optimal
Solution Approach 1:
The damping element is constructed as a composite structure with two distinct layers: a first layer made of vibration-absorbing material (such as foam or fibrous material) for optimal sound insulation, and a second layer made of elastic material (such as rubber or silicone) for mechanical protection and adhesion. This composite structure resolves the contradiction by combining materials with different properties to simultaneously achieve both noise reduction and mechanical durability.
Solution Approach 2:
The damping element is divided into two functional segments or layers, each performing a specific function. The first layer is optimized for acoustic damping with high porosity and vibration absorption, while the second layer is optimized for mechanical protection with elastic properties. This segmentation allows each layer to be independently optimized for its specific function, achieving both noise reduction and mechanical protection without compromise.
2Object-affected harmful factors
If adhesive fastening structures are used to attach the damping element, then the damping element is securely fixed, but the acoustic damping properties are reduced
Solution Approach 1:
The second layer of the damping element is designed with self-adhesive properties through its elastic material characteristics, allowing it to attach to the drum shell without requiring additional adhesive fastening structures. The elastic layer naturally conforms to the drum surface and maintains secure attachment through its inherent粘性和弹性, thus preserving the acoustic damping properties of the first layer while achieving secure fixation.
Solution Approach 2:
The second layer is made of a flexible elastic material that can be stretched and molded to fit the drum shell surface. This flexible film-like structure provides secure attachment through its elastic recovery and conformability, eliminating the need for rigid adhesive fasteners that would compromise the acoustic performance of the damping element.
3Object-affected harmful factors
If the first layer is made thick for better vibration absorption, then the sound insulation improves, but the drum structure becomes more complex and space-consuming
Solution Approach 1:
Instead of increasing the thickness of a single damping layer, the invention uses a composite structure where a relatively thin first layer of vibration-absorbing material is combined with a second layer of elastic material. The composite structure achieves effective vibration absorption and sound insulation through the synergistic interaction of the two layers, avoiding the need for excessive thickness and reducing structural complexity.
Solution Approach 2:
The invention optimizes the thickness parameters of both layers to achieve the desired vibration absorption with minimal total thickness. The first layer is designed with specific thickness and density parameters optimized for acoustic damping, while the second layer provides mechanical support with minimal thickness. This parameter optimization allows effective vibration absorption without excessive complexity or space consumption.
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 solution achieves improved soundproofing and reduced mechanical vibrations, enhancing the overall performance and durability of the drum by minimizing noise and protecting it from harmful vibrations during rotation and air flow.
Implementation Method 1
the first layer comprises or consists of vibration-absorbing material and rests on the surface of the shell
Implementation Method 2
the second layer consists of an elastic material and rests on the first layer
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a drum (3) for a clothes dryer (1), in which the drum (3) can be rotatably mounted about a horizontal or inclined axis (13), comprising a cylindrical shell (19), preferably made of sheet metal, which is bounded by two opposing end walls (20a, 20b); and an insulating element (30) which is attached to the outside of the drum. The insulating element (30) comprises two layers, the first layer being a fabric layer and resting on the surface of the shell, and the second layer being made of an elastic material and resting on the first layer. The invention also relates to a clothes dryer with a rotatably mounted drum (3) as described above and all the necessary components for carrying out a treatment program.