Vertical Tumbling Drum for Log Bundle Breaking
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Solution Overview
Problem
Traditional wood processing systems face challenges in achieving uniform feeding capacity and preventing clogging due to incomplete debarking and handling of long or twisted logs, with existing solutions either failing to effectively remove bark or not providing sufficient capacity.
Innovation Solution
An apparatus featuring a feed conveyor with speed control, a through-flow tumbling drum with a revolution-controllable drive, and position indication means, allowing for controlled breaking and discharge of log bundles, enabling efficient bark removal and maintaining high capacity by adjusting conveying speed based on log bundle positioning and torque data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a receiving table and unscrambling conveyor are used to feed logs to a chipper, then the logs can be fed in a uniform flow, but the loose bark causes clogging problems on the receiving table and conveyor
Solution Approach 1:
The patent extracts the harmful loose bark from the log bundles before they enter the receiving table and conveyor system. By removing the bark in advance (either through forest debarking or additional debarking equipment), the source of clogging is eliminated while the uniform log flow is maintained through the existing conveyor system.
Solution Approach 2:
The patent applies preliminary debarking action before the logs enter the receiving table and conveyor system. By removing loose bark in advance through forest debarking or additional debarking equipment positioned before the receiving table, the system prevents clogging from occurring during the uniform log flow process.
2Manufacturing precision
If the tumbling drum is made longer to improve breaking of log bundles, then the bundles break more completely, but wood losses increase due to excessive breaking
Solution Approach 1:
The patent changes the key parameter of the tumbling drum from its traditional horizontal cylindrical shape to a vertically oriented shaft configuration. This fundamental geometric parameter change allows the drum to be much shorter while still achieving effective bundle breaking through the vertical tumbling action, thereby reducing wood losses from excessive breaking.
Solution Approach 2:
The patent inverts the traditional horizontal orientation of the tumbling drum to a vertical orientation. By rotating the drum shaft vertically instead of horizontally, the system achieves effective bundle breaking in a much shorter drum length, preventing the excessive breaking that causes wood losses.
3Loss of substance
If the tumbling drum is made shorter to reduce wood damage, then wood losses decrease, but the breaking of log bundles becomes incomplete
Solution Approach 1:
The patent changes the fundamental geometric parameter of the tumbling drum from horizontal to vertical orientation. This parameter change enables the drum to be shortened significantly while maintaining effective bundle breaking capability, as the vertical tumbling action achieves thorough breaking in a compact space.
Solution Approach 2:
The patent inverts the traditional horizontal tumbling drum to a vertical configuration. This inversion allows the drum to be much shorter while still achieving complete bundle breaking, as the vertical rotation creates effective tumbling action that breaks bundles thoroughly without requiring excessive drum length.
4Manufacturing precision
If a traditional debarking drum is used to break log bundles, then the bundles are broken, but the log bundles are not totally broken and capacity is insufficient
Solution Approach 1:
The patent changes the fundamental parameters of the tumbling drum including its vertical orientation, smaller diameter (3-6m), and optimized length (1.5-3 times log length). These parameter changes enable more effective bundle breaking that completely disintegrates the bundles, thereby increasing the system's processing capacity.
Solution Approach 2:
The patent inverts the traditional horizontal debarking drum to a vertical tumbling drum configuration. This inversion, combined with optimized dimensions, creates a more effective breaking action that completely disintegrates log bundles, thereby increasing the overall system capacity for processing debarked wood.
Data Source
AI summary
The present invention concerns an apparatus for receiving and feeding into a chipper wood to be chipped, said apparatus containing a feed conveyor receiving log bundles, a tumbling drum breaking the bundles, and a receiving conveyor. The feed conveyor is speed-controlled according to the position information of a log bundle, and the speed of rotation of the tumbling drum is adjusted depending on the amount of wood discharged from the drum. The position information of the log bundle is received for example from the torque moment or input power of the drives of the drum. Thereby the speed of the feed conveyor, respectively the rotation speed of the drum, is set to slow down as a result of the increasing toque moment or input power of the drum, respectively to speed up as a result of the decreasing torque moment or input power.