Steam-Heated Hollow Roller Siphon Adjustment
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Solution Overview
Problem
Existing steam-heatable hollow rollers face challenges in adjusting the distance between the suction opening of the siphon tube and the inner wall during operation, leading to inefficient condensate removal and potential grinding issues, which disrupt heat transfer and require plant shutdowns for adjustments.
Innovation Solution
The distance between the suction opening and the inner wall is adjusted by pivoting a rotary bushing outside the hollow roller, allowing for precise adjustment during operation without stopping the production plant, using stationary pivot bearings and a manual or motorized adjustment mechanism to prevent grinding and ensure effective condensate removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the suction opening of the siphon tube is placed close to the inner wall of the hollow roller for effective condensate removal, then condensate drainage efficiency is improved, but the suction opening may grind against the inner wall causing tight contact and loss of suction capability
Solution Approach 1:
The siphon tube is made adjustable relative to the hollow roller, allowing the distance between the suction opening and inner wall to be dynamically optimized. This enables the system to maintain effective condensate removal while preventing grinding contact, resolving the contradiction between drainage efficiency and avoiding damage.
2Manufacturing precision
If adjusting screws are used to set the distance between suction opening and inner wall, then initial positioning is possible, but adjustment during operation requires plant shutdown
Solution Approach 1:
The adjustment mechanism allows the siphon tube position to be changed during operation without shutting down the plant. The adjustable design enables operators to optimize the distance between the suction opening and inner wall while the hollow roller is running, maintaining both precision and production continuity.
Solution Approach 2:
The system includes self-adjustment capabilities where the siphon tube can be repositioned during operation through accessible adjustment mechanisms, allowing the system to adapt to changing conditions without external intervention or plant shutdown.
3Productivity
If the hollow roller operates at high speed for increased productivity, then production output is improved, but condensate removal becomes less effective due to centrifugal force
Solution Approach 1:
The adjustable siphon tube allows optimization of the suction opening position relative to the inner wall at different operating speeds. At high speeds, the distance can be adjusted to account for centrifugal effects, ensuring condensate is effectively removed even when the hollow roller operates at maximum productivity.
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 continuous operation with improved heat transfer by ensuring the condensate is efficiently removed, preventing grinding and allowing for precise adjustment of the gap between the suction opening and the inner wall, even at high speeds, thus maintaining production efficiency.
Implementation Method 1
steam, usually saturated steam or superheated steam, is blown into the inner hollow roller. It gives off its heat via the inner wall of the hollow roller to its jacket, with the water vapor condensing.
Implementation Method 2
The condensate collects on the inner wall of the rotating hollow roller due to gravity and centrifugal force. This condensate layer has an insulating effect and thus disrupts the heat transfer from the steam to the roller.
Implementation Method 3
The condensate collects on the inner wall of the rotating hollow roller due to gravity and centrifugal force.
Implementation Method 4
The condensate collects on the inner wall of the rotating hollow roller due to gravity and centrifugal force.
Data Source
Figure 1
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Figure 3
AI summary
A steam-heated hollow cylinder (1) has an inner wall (25). It is rotatably mounted and has a steam supply channel opening into the inner chamber (13) and a siphon tube (14) opening into the inner chamber (13) coaxially with a central longitudinal axis (5), with a suction opening (24) located adjacent to the inner wall (25). The siphon tube (14) is held in a rotary feedthrough (16) which can be pivoted relative to the central longitudinal axis (5) of the hollow cylinder (1) by a pivot angle α such that the distance b of the suction opening (24) from the inner wall (25) is adjustable.