Projector Wheel Damper Layout for Vibration and Noise Reduction
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Solution Overview
Problem
Wheels in projectors generate vibration and noise during operation, which are transmitted to other mechanical components, leading to increased noise and temperature issues, and existing solutions like increasing the wheel bracket weight or using large fans exacerbate these problems.
Innovation Solution
A wheel design featuring a damper disposed between the driving assembly and the fixing bracket, where the damper has a larger diameter than the driving assembly, reducing vibration transmission and noise, and optionally incorporating a heat dissipation module to manage temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the weight of the wheel bracket is increased to reduce vibration transmission, then the vibration transmission is reduced, but the weight and volume of the projector increase
Solution Approach 1:
A damper is introduced as an intermediary component between the wheel and the wheel bracket. The damper absorbs and dissipates vibration energy, reducing the transmission of vibration to the bracket and housing without requiring increased bracket weight. This mediator approach resolves the contradiction by providing vibration isolation through a lightweight damping element rather than through mass.
Solution Approach 2:
The damper changes the vibration parameters (amplitude and frequency) by converting mechanical vibration energy into thermal energy through internal friction and material hysteresis. This parameter transformation allows vibration reduction without adding significant weight, as the damper operates by energy dissipation rather than mass-based inertia.
2Object-affected harmful factors
If the weight of the wheel bracket is increased to reduce vibration transmission, then the vibration transmission is reduced, but the volume of the projector increases
Solution Approach 1:
The damper serves as a compact intermediary component that provides vibration isolation in a small volume. Compared to the large volume increase that would result from thickening the wheel bracket, the damper achieves similar or better vibration reduction with minimal volume addition, as it relies on material damping properties rather than structural mass.
3Temperature
If a fan with a relatively large flow rate is used to reduce the temperature of the driving assembly, then the temperature is reduced, but the noise and volume of the projector increase
Solution Approach 1:
The vibration energy that was previously harmful and causing noise is converted into thermal energy within the damper material through internal friction. This converts the harmful mechanical vibration into harmless heat, which is then easily dissipated. The same damping mechanism that reduces vibration also reduces the need for high-flow fans, thereby reducing noise without compromising cooling effectiveness.
4Temperature
If a fan with a relatively large flow rate is used to reduce the temperature of the driving assembly, then the temperature is reduced, but the volume of the projector increases
Solution Approach 1:
By converting vibration energy into thermal energy in the damper, the system generates heat that needs to be dissipated. However, this approach allows for more efficient thermal management overall, as the vibration-to-heat conversion is localized and the resulting thermal load can be managed with a smaller, more compact cooling system compared to the high-flow fan approach, thereby reducing projector volume.
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 reduces noise and extends the service life of the wheel by minimizing vibration transmission and managing temperature through the use of a damper and optional heat dissipation, thereby mitigating projector noise and improving operational efficiency.
Implementation Method 1
the damper is disposed between the driving assembly and the fixing bracket to reduce an amount of vibration transmitted to the fixing bracket
Data Source
AI summary
A wheel including a substrate, a driving assembly, a fixing bracket, and a damper is provided. The driving assembly is disposed on the substrate to drive the substrate to rotate. The driving assembly and the damper are fixed onto the fixing bracket. The damper is disposed between the driving assembly and the fixing bracket, and the driving assembly is located between the substrate and the damper. The driving assembly has a first diameter, the damper has a second diameter, and the second diameter is greater than or equal to the first diameter. The wheel is disposed in a projector and may effectively reduce vibration and noise generated during the operation of the wheel, so as to mitigate a noise problem of the projector and increase a service life of the wheel.