Aerial Rope Transport Torque Motor for Slipping Prevention

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional transport installations face a high risk of slipping of the roller sheave with respect to the rope due to variable power requirements, leading to increased manufacturing, installation, and maintenance costs, especially under high capacity and unfavorable external conditions.

Innovation Solution

Incorporating an electric torque motor connected to one of the wheels, which provides a constant power independent of speed, supplementing the power take-off from the rope to ensure consistent power transmission and prevent slipping.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the power take-off is over-dimensioned to prevent slipping, then the reliability of power transmission is improved, but the manufacturing, installation and maintenance costs increase

Engineering Contradiction:

Improveprevention of roller sheave slippingVSAvoidmanufacturing, installation and maintenance costs

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The invention combines two power sources: the conventional power take-off derived from rope movement and an auxiliary electric motor. The electric motor supplements the power take-off during periods of high power demand or unfavorable external conditions, preventing roller sheave slipping without requiring the power take-off to be over-dimensioned. This shared power source approach resolves the contradiction by distributing the power delivery burden.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The invention changes the operational parameters of the power transmission system by introducing variable speed control through the electric motor. The motor can adjust its output based on real-time conditions, supplementing the power take-off when needed and reducing load when conditions are favorable. This dynamic parameter adjustment prevents slipping without requiring permanent over-dimensioning of the power take-off.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If the number of sets of wheels is increased to reduce slipping risk, then the reliability of vehicle movement is improved, but the manufacturing, installation and maintenance costs increase

Engineering Contradiction:

Improveprevention of roller sheave slippingVSAvoidnumber of sets of wheels and power take-offs

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Instead of increasing the number of wheel sets and power take-offs, the invention merges the functions of power delivery by combining the conventional power take-off with an auxiliary electric motor on the same wheel set. This consolidation maintains reliability through dual power sources while avoiding the complexity and cost increases associated with multiplying the number of wheel sets.

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If the power take-off is designed for high capacity installations, then the power transmission reliability is improved, but the manufacturing, installation and maintenance costs increase

Engineering Contradiction:

Improvepower transmission under high capacity conditionsVSAvoidmanufacturing, installation and maintenance costs

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The invention applies partial action by using the electric motor only when necessary to supplement the power take-off. The motor provides additional power during high capacity operations or unfavorable external conditions, but remains dormant or reduces output when the power take-off suffices. This selective supplementation achieves reliable power transmission under high capacity conditions without the continuous cost penalty of an oversized power take-off.

Inventive Principle:

Principle #16Partial or excessive action

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 reduces the risk of slipping and lowers costs by providing a constant power component, allowing for efficient vehicle movement without the need for over-dimensioning the power take-off or increasing the number of wheels, thus simplifying manufacturing, installation, and maintenance.

Implementation Method 1

one of the wheels of which is connected by transmission means to the output shaft of an electric torque motor generating a constant turning torque independent of the speed of rotation of said output shaft

Methodology Applied

Scientific EffectTorque motor electromagnetic conversion: Electromagnetic Induction

Implementation Method 2

a roller sheave pressing on the rope and set in motion by the running movement of the rope

Methodology Applied

Scientific EffectFriction: Friction

Data Source

PatentUS7891301B2Transport installation by aerial rope comprising a vehicle transfer circuit equipped with a torque motor

Publication Date: 2011.02.22 POMAGALSKI SA

AI summary

A transport installation comprising an aerial rope with continuous running on which vehicles are suspended by detachable grips, comprises a transfer circuit equipped with means for moving the vehicles. The means for moving comprise at least one set of wheels with pneumatic tires one of which wheels is connected to a power take-off derived from running of the rope and equipped with drive means whereby each wheel is made to rotate by one of the adjacent wheels. One of the wheels of said set of wheels is connected by transmission means to the output shaft of an electric torque motor generating a constant turning torque independent from the speed of rotation of said output shaft.