Rotary Valve Sheet Suction Device for Dynamic Suction Control
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Solution Overview
Problem
Current sheet suction devices in printers face challenges in efficiently conveying sheets of varying sizes due to fixed suction regions, leading to inefficiencies and potential misalignment during the printing process.
Innovation Solution
A sheet suction device with a rotary valve system that adjusts the number of suction holes communicating with the suction device based on the relative rotation between the drum and the valve, allowing for dynamic switching of suction regions to accommodate different sheet sizes, ensuring optimal suction and conveyance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed suction region is used, then the device structure is simple, but it cannot efficiently convey sheets of varying sizes
Solution Approach 1:
The suction region is made dynamic through a rotary valve that can rotate to change the number of suction holes communicating with the suction device. This allows the suction region to be adjusted according to sheet size, resolving the contradiction between adaptability and device complexity by introducing a controllable dynamic element rather than requiring multiple fixed configurations
Solution Approach 2:
The suction surface is segmented into multiple discrete suction holes arranged in different regions. The rotary valve selectively connects different numbers and combinations of these suction holes to the suction device, enabling flexible configuration of the suction region to match different sheet sizes while maintaining a relatively simple overall structure
2Force
If the number of suction holes is increased, then suction force is improved, but energy consumption increases
Solution Approach 1:
Instead of keeping all suction holes open simultaneously, the system uses partial action by selectively opening only the necessary number of suction holes based on sheet size. The rotary valve controls which suction holes communicate with the suction device, ensuring sufficient suction force is applied only where needed, thereby reducing overall energy consumption while maintaining effective sheet conveyance
Solution Approach 2:
The system changes the operational parameters of the suction device by varying the number of active suction holes according to sheet size. This parameter adjustment allows optimization of the balance between suction force and energy consumption, using more suction holes for larger sheets and fewer for smaller sheets
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 solution enables efficient conveyance of sheets of various sizes by dynamically adjusting suction regions, improving printing accuracy and efficiency by ensuring proper alignment and suction force distribution.
Implementation Method 1
a suction device configured to suck the sheet through the multiple suction holes
Data Source
AI summary
A sheet suction device includes a drum including multiple suction holes in a circumferential surface of the drum, the drum configured to bear a sheet on the circumferential surface and rotate, a suction device configured to suck the sheet through the multiple suction holes, a rotary valve between the multiple suction holes of the drum and the suction device, the rotary valve configured to rotate relative to the drum to change a number of the multiple suction holes communicating with the suction device, and a driver configured to relatively rotate the drum and the rotary valve.