Reversible Turbine Wheel for High-Speed Rotary Atomizer
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Solution Overview
Problem
Conventional high-speed rotary atomizers used on opposite sides of a workpiece for painting result in uneven paint consumption due to differing relative movement conditions, leading to inefficiencies and suboptimal paint finishes.
Innovation Solution
The turbine wheel is designed with fluidically optimized vanes for one direction of rotation, allowing for reversible operation by mounting in two positions or using two connected turbine wheels with separate air spaces, and switching valves to direct air flow appropriately, enabling efficient operation in both directions without assembly changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the turbine wheel is designed with neutral wings that can be blown from different directions, then the bell can be driven in different directions of rotation, but this results in a significant loss of efficiency
Solution Approach 1:
The turbine wheel is divided into two separate wheels, each optimized for a specific direction of rotation. One turbine wheel has wings optimized for clockwise rotation, while the other has wings optimized for counter-clockwise rotation. This segmentation allows each wheel to maintain high efficiency for its designated direction without compromising the other direction's performance.
Solution Approach 2:
Each turbine wheel is designed with locally optimized wing characteristics suited for its specific rotation direction. The wings of the first turbine wheel have aerodynamic properties optimized for one direction, while the wings of the second turbine wheel have different aerodynamic properties optimized for the opposite direction, ensuring maximum efficiency in each case.
2Ease of manufacture
If identically built high-speed rotary atomizers are used on opposite sides of the workpiece, then the setup is simple and symmetric, but different paint consumption results on opposite side surfaces due to workpiece movement
Solution Approach 1:
Instead of using identical turbine wheels on both sides, the invention uses turbine wheels with opposite rotation directions. This inversion of the rotation direction compensates for the workpiece movement effects, ensuring that the relative movement conditions between the workpiece surface and the bells are equalized on both sides, thereby achieving uniform paint consumption.
3Loss of energy
If the turbine wheel is designed with fluidically optimized vanes for one direction of rotation, then efficiency is improved, but the turbine wheel can only be mounted in a single orientation
Solution Approach 1:
The system achieves multi-functionality by providing two separate turbine wheels, each optimized for a specific rotation direction. This allows the high-speed rotary atomizer to function efficiently in both clockwise and counter-clockwise rotation modes, making the system universally applicable for different painting scenarios requiring different rotation 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
This design ensures symmetrical paint application on both sides of the workpiece, improving paint surface quality and efficiency by optimizing the orientation and air flow direction of the turbine wheels, reducing the need for assembly adjustments and maintaining high-speed operation.
Implementation Method 1
the turbine wheel is formed with vanes which are fluidically optimized for one direction of rotation
Implementation Method 2
the drive compressed air can be supplied to the turbine wheel
Implementation Method 3
at least one air duct running in the housing, via which the drive compressed air can be supplied to the turbine wheel
Implementation Method 4
at least one air duct running in the housing, via which compressed air for braking can be supplied to the turbine wheel
Data Source
Figure 1
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AI summary
The invention relates to a high-speed rotary atomizer (1), wherein at least one turbine wheel (110) is arranged in a housing (130) in a known manner, which turbine wheel can be driven in opposite rotational directions and is connected to a bell (108). Driving or braking compressed air can be applied to the turbine wheel (110) via suitable air channels (112, 114), and the turbine wheel has blades (116), which are optimized in respect of flow for one rotational direction. In one embodiment of the invention, the turbine wheel (110) is designed in such a way that the turbine wheel can be mounted reversibly in two positions, in which the blades (116) have the orientation correct for different rotational directions. In another embodiment, two turbine wheels connected to each other are provided, the blades of which are optimized for different rotational directions and can be supplied with driving and braking air selectively via air chambers that are separate from each other.