Rotary Optical Module Balance Ring Radial Protrusions Heat Dissipation
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Solution Overview
Problem
The existing phosphor wheels in projection apparatuses suffer from poor heat dissipation due to the concentric protruding structure, which leads to increased noise and reduced dynamic balance control.
Innovation Solution
A rotary optical module with radially arranged protruding structures on the balance ring, where the height of these protruding structures exceeds the height of the outer retaining wall, enhancing heat dissipation by increasing the heat transfer area and creating turbulence during rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a concentric protruding structure is added to the turntable to increase weight and optimize the centroid, then the dynamic balance is improved, but the heat dissipation effect deteriorates
Solution Approach 1:
The balance ring is divided into multiple radial segments with protruding structures, creating separate heat dissipation zones while maintaining overall balance. The protruding structures are distributed radially around the balance ring, segmenting the heat dissipation function from the centrifugal force generation function.
Solution Approach 2:
The design transitions from a two-dimensional planar balance ring to a three-dimensional structure with radially arranged protruding structures. These protrusions extend in the axial direction (first direction) beyond the outer retaining wall, adding vertical dimensionality to enhance heat dissipation surface area while maintaining radial balance.
2Stability of the object's composition
If the metal ring and motor are placed on different sides to optimize centroid positioning, then the centroid control is improved, but the noise increases due to increased distance from the motor
Solution Approach 1:
The balance ring is integrated with the motor assembly, with the protruding structures radially arranged on the balance ring that is coupled to the motor output shaft. This merging allows the balance ring to serve dual functions: optimizing centroid position and reducing noise through its proximity to the motor while maintaining dynamic balance.
3Temperature
If a concave-convex structure is added to the turntable to enhance heat dissipation, then the phosphor temperature is reduced by 10% to 20%, but the heat dissipation becomes insufficient when energy density of the phosphor region increases
Solution Approach 1:
The balance ring features localized protruding structures with different geometries at different radial positions. Each protruding structure has optimized dimensions and spacing tailored to local heat dissipation requirements, creating areas of enhanced heat transfer where needed while maintaining overall system performance.
Solution Approach 2:
The radial protruding structures on the rotating balance ring create dynamic airflow patterns that enhance convective heat transfer. As the balance ring rotates, the protrusions periodically disrupt the air flow, generating turbulence that increases heat dissipation efficiency beyond what static concave-convex structures can achieve.
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 proposed solution improves the heat dissipation efficiency of the rotary optical module by at least 12.6% compared to traditional designs, reducing noise and enhancing dynamic balance control.
Implementation Method 1
the phosphor wheel drives the air flow field around, and cold air is flung outward by the phosphor wheel after sucked in from the region near a turntable axis. Therefore, the cold air cannot have sufficient disturbance and time for heat exchange with the turntable and the metal ring
Implementation Method 2
cold air is flung outward by the phosphor wheel after sucked in from the region near a turntable axis
Data Source
AI summary
Provided is a rotary optical module, including a drive device, an optical turntable, a balance ring, at least one counterweight device, and multiple protruding structures. The drive device includes a rotary axis, extending along a first direction. The optical turntable and the balance ring are both sleeved on the rotary axis of the drive device, and the balance ring is located between the drive device and the optical turntable. The balance ring includes an outer retaining wall, located at the edge of the balance ring. The at least one counterweight device is disposed on the balance ring and abuts against the inner side of the outer retaining wall. The protruding structures are radially arranged on the balance ring with the rotary axis as the center, and the height of the protruding structures in the first direction is greater than the height of the outer retaining wall in the first direction.