Dual Drum Traction Winch Self-Generated Preload

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Solution Overview

Problem

Dual drum traction winches require additional capital equipment for preload, leading to inefficiencies and unpredictability in tension distribution, reducing their capacity and complicating operations when handling synthetic ropes.

Innovation Solution

The dual drum traction winch is designed to generate its own preload internally, eliminating the need for external preload sources and allowing operation with various configurations such as an upstream reel, unpowered spool, or loose rope bundles, using a pretension device integrated within the winch to maintain adequate tension without reducing its capacity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a separate pretension reel is used to provide preload for the dual drum traction winch, then the synthetic rope can be properly tensioned, but the device complexity and capital equipment requirements increase

Engineering Contradiction:

Improverope tensioning reliabilityVSAvoidequipment configuration complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines the pretensioning function and the main winch function into a single dual drum traction winch unit. The first drum handles pretensioning while the second drum handles the main lifting operation, eliminating the need for a separate pretension reel and reducing overall system complexity while maintaining reliable rope tensioning

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The dual drum traction winch is designed to perform multiple functions: it can provide both pretensioning (first drum) and main lifting (second drum) operations. This multi-functionality eliminates the need for separate specialized equipment while maintaining the reliability required for synthetic rope handling

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If a separate pretension reel is used to provide preload, then the synthetic rope can be tensioned, but the cost and equipment requirements increase

Engineering Contradiction:

Improverope tensioning reliabilityVSAvoiddeployment simplicity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

By merging the pretensioning and main winch functions into one unit, the patent reduces the number of capital equipment pieces required for deployment. This single-unit design simplifies manufacturing, reduces costs, and eliminates the need for complex coordination between multiple equipment pieces while ensuring reliable rope tensioning

Inventive Principle:

Principle #5Merging (Combining)

3Ease of operation

If pretension is provided by an upstream reel, then the dual drum traction winch can operate, but the available capacity is reduced due to unpredictable tension loading

Engineering Contradiction:

Improvewinch operabilityVSAvoidwinch capacity

Core Design Contradiction:

Ease of operationVSPower

Solution Approach 1:

The patent segments the winch into two separate drums: the first drum dedicated to pretensioning and the second drum to main lifting. This segmentation allows independent control of pretension forces, enabling the system to operate reliably while maintaining full capacity on the second drum without unpredictable tension loading from an external source

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The dual drum traction winch generates its own pretension force internally through the first drum, eliminating dependence on external upstream reels. This self-service capability ensures predictable tension distribution and maintains full winch capacity while ensuring proper operability

Inventive Principle:

Principle #25Self-service

4Adaptability or versatility

If pretension is provided by another reel, then the synthetic rope can be handled, but duplicate capital equipment is required

Engineering Contradiction:

Improverope handling capabilityVSAvoidequipment duplication

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The dual drum traction winch is designed as a universal unit that can handle synthetic ropes through its first drum for pretensioning and its second drum for main lifting. This multi-functional design provides complete rope handling capability without requiring duplicate specialized equipment, reducing system complexity while maintaining versatility

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 the dual drum traction winch to maintain full capacity and reliability by self-generating preload, simplifying operations and eliminating the need for duplicate equipment, ensuring consistent tension across different rope configurations and loads.

Implementation Method 1

They use multiple wraps around multi-groove drums to accumulate a lot of friction or traction. Literally the friction from one drum groove is passed on to and is amplified by the next drum groove it crosses.

Methodology Applied

Scientific EffectFriction: Friction

Data Source

PatentUS10669138B2Method of providing preload for a dual drum traction winch

Publication Date: 2020.06.02 BAUGH BENTON FREDERICK

AI summary

The method of providing a necessary preload for a rope or cable on a dual drum traction winch without reducing the capacity of the winch or requiring a second piece of capital equipment to provide the preload force by using a freely rotating wheel to load the rope or cable against at least one of the drums and cause a frictional traction on the winch drum.