Pivotable Drive Unit for Winding Shaft
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Solution Overview
Problem
Conventional methods for continuously winding fibrous webs, such as paper or tissue webs, require complex constructions with multiple geared motors, leading to high costs and maintenance needs, as well as space inefficiencies.
Innovation Solution
A method where the winding shaft is driven by a single pivotable drive unit throughout both primary and secondary winding phases, eliminating the need for separate motors and gearboxes, and allowing for retrofitting existing systems with minimal intervention, using a direct drive or shared gearbox.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate geared motors are used on driver's side and drive side for primary and secondary winding phases, then reliable continuous winding is achieved, but device complexity and cost increase
Solution Approach 1:
The patent combines the drive functions for both primary and secondary winding phases into a single pivotable drive unit. This drive unit can be positioned to drive the winding shaft during primary winding (when supported by primary arms) and then repositioned to continue driving during secondary winding (when transferred to secondary arms), eliminating the need for separate motors on driver's side and drive side.
Solution Approach 2:
The single drive unit is designed with multi-functionality to perform the winding drive task in both primary and secondary winding phases. It achieves this through pivotal movement that allows it to access and drive the winding shaft regardless of whether the winding shaft is supported by primary arms or secondary arms, making one drive unit serve multiple operational phases.
2Power
If multiple geared motors and gearboxes are installed, then sufficient drive power is provided, but space requirements increase
Solution Approach 1:
The patent merges multiple drive components (motors and gearboxes) into a single integrated drive unit, reducing the overall space occupied by drive mechanisms. This single unit provides sufficient drive power for both primary and secondary winding phases through its pivotal positioning capability, eliminating the need for separate motor installations on both driver's side and drive side.
3Productivity
If separate drives are used for primary and secondary winding phases, then each phase can be optimized, but maintenance requirements increase
Solution Approach 1:
The patent combines the drive functions into a single drive unit that serves both primary and secondary winding phases. This reduces the total number of motors and gearboxes from multiple separate drives to just one, thereby reducing maintenance requirements and simplifying repair operations while still providing optimized drive control for each winding phase through the pivotal positioning mechanism.
Data Source
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AI summary
The subject matter of this invention is a method for the continuous winding of a fibrous web, in particular a paper or tissue web. The web is guided over a support drum (29) and subsequently wound onto a winding shaft (4). During the primary winding phase, the winding shaft (4) is held by pivotable primary arms (3) and then transferred to secondary arms. According to the invention, the winding shaft (4) is driven by the same pivotable drive unit (1) during both the primary and secondary winding phases. The subject matter of this invention also includes a device for carrying out the method according to the invention.