Rotary Atomizer Conical Magnetic Attachment
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Solution Overview
Problem
Existing rotary atomizers face challenges in securely attaching the spray bell to the bell disk shaft at high speeds, leading to potential detachment and increased operating costs due to high air consumption when using magnetic attachments for stationary operation.
Innovation Solution
A rotary atomizer design featuring a conical receiving section on the bell disk shaft and a conical insertion section on the spray bell, combined with magnetic elements, provides a secure and easy-to-use attachment that utilizes both magnetic and frictional forces for axial retention, reducing the need for excessive air usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If magnetic pins are used to attach the spray bell to the bell disk shaft, then the spray bell can be easily assembled and disassembled, but there is a risk that the spray bell can fall off the shaft when it is stationary
Solution Approach 1:
The attachment system is divided into two independent components: magnetic pins for easy assembly/disassembly and a conical frictional connection for continuous retention. The magnetic pins (20, 21, 22) are segmented and distributed around the circumference, allowing simple plug-in operation, while the conical insertion section (9) and receiving section (5) provide continuous mechanical retention when stationary.
Solution Approach 2:
The attachment mechanism combines two different physical principles: magnetic force and frictional force. The magnetic elements (permanent magnets or ferromagnetic materials) provide one type of retention, while the conical frictional connection provides another, creating a composite attachment system that leverages the advantages of both mechanisms.
2Ease of operation
If bearing air is used to lift the spray bell off the housing to enable rotatability, then the spray bell can rotate freely, but air consumption increases significantly
Solution Approach 1:
The pneumatic bearing system is replaced with a mechanical conical frictional connection. Instead of using compressed air to create a floating state for rotatability, the conical insertion section (9) and receiving section (5) provide direct mechanical support and rotation capability through friction, eliminating the need for continuous air consumption.
Solution Approach 2:
The conical frictional connection is a passive mechanical system that provides rotatability and support automatically without requiring external energy input. The spray bell rotates freely on the conical surfaces through its own weight and motion, without needing an external air supply system to maintain the floating state.
3Reliability
If a threaded connection is used to attach the spray bell to the bell disk shaft, then the attachment is secure for high-speed rotation, but the assembly and disassembly require tools and time
Solution Approach 1:
The threaded mechanical connection is replaced with a magnetic plug-in connection combined with conical frictional retention. The magnetic pins allow the spray bell to be simply pushed onto the shaft without threading operations, while the conical frictional connection maintains secure attachment during high-speed rotation, eliminating the need for tools and complex threading operations.
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 secure attachment of the spray bell without tools, minimizes the risk of detachment, and significantly reduces air consumption by more than half, resulting in lower operating costs and enhanced safety.
Implementation Method 1
the at least one ferromagnetic element and the at least one permanent magnetic element exert on one another a magnetic force having a component in axial direction parallel to the axis of rotation
Implementation Method 2
the spray bell can also be held frictionally by static friction as a result of the self-locking on the bell disk shaft
Data Source
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AI summary
The invention relates to a rotary atomizer (1) for coating components, comprising a bell-shaped shaft (3) and a spray bell (4) that can be inserted into the bell-shaped shaft (3) in a specific area and is detachably attached to the bell-shaped shaft (3). The spray bell (4) has at least one ferromagnetic element (11, 18) or at least one permanent magnet element (7), and the bell-shaped shaft (3) has at least one permanent magnet element (7) or at least one ferromagnetic element (11, 18), which are arranged relative to each other such that the ferromagnetic element (11, 18) and the permanent magnet element (7) exert a magnetic holding force on each other parallel to the axis of rotation of the bell-shaped shaft (3) in order to detachably hold the spray bell (4) on the bell-shaped shaft (3).A particularly secure fastening can be achieved by the bell plate shaft (3) having a conical receiving section (5) facing the spray bell (4), and by the spray bell (4) having a conical insertion section (9) facing the bell plate shaft (3).