Conveyor Pulley Thermal Control via Rotary Union
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Solution Overview
Problem
Belted conveyor systems operating in colder climates face challenges with pulleys icing up and belts becoming rigid, leading to inefficiencies and increased labor when using external heaters to melt ice and snow.
Innovation Solution
A thermal control system integrated within the conveyor pulley, utilizing a slip ring or rotary union to transmit fluid or electrical power, allowing for internal temperature regulation of the pulley, either stationary or rotating, through fluid-based or electrically powered heating systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If external portable heaters are used to heat the conveyor pulley, then the pulley temperature can be maintained, but the system complexity and labor requirements increase
Solution Approach 1:
The heating element is merged with the conveyor pulley by integrating it into the pulley's internal structure. The pulley is divided into an inner region containing the heating element and an outer region, creating a unified structure where the heater becomes an intrinsic part of the pulley rather than an external accessory.
Solution Approach 2:
The heating element is nested within the internal structure of the conveyor pulley. The heater is positioned inside the pulley's hollow interior, with the pulley wall surrounding and protecting the heating element while allowing heat to conduct outward to the belt contact surface.
2Temperature
If multiple external heaters are used to heat different portions of the system, then complete coverage is achieved, but the quantity of equipment and management complexity increase
Solution Approach 1:
The integrated heating system provides universal heating coverage for the entire pulley surface through a single unit. The heating element positioned within the pulley's interior structure radiates heat uniformly across the entire outer surface, eliminating the need for multiple specialized heaters targeting different zones.
3Loss of energy
If external heaters are positioned close to the conveyor pulley, then heating efficiency improves, but labor for positioning and operation increases
Solution Approach 1:
The conveyor pulley heats itself through the integrated heating element that is permanently mounted within its structure. The system is self-contained and automatically maintains the pulley temperature without requiring external positioning or manual operation, as the heater is built into the pulley's own structure.
4Loss of energy
If the pulley structure is modified to include internal heating, then heating efficiency improves, but manufacturing complexity increases
Solution Approach 1:
The pulley is segmented into distinct functional regions: an inner region containing the heating element and an outer region forming the structural body. This segmentation allows the heating component to be manufactured separately and then integrated into the pulley structure, simplifying the overall manufacturing process.
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 efficient and labor-saving temperature control of conveyor pulleys, reducing the need for external heaters and minimizing fluid usage by distributing heat uniformly within the pulley, thus maintaining system functionality in cold conditions.
Implementation Method 1
an electric heater disposed within a drum of the pulley and a power supply path to deliver power to the electric heater
Implementation Method 2
the interior of the drum contains a fluid to distribute the heat uniformly about the conveyor pulley
Implementation Method 3
a slip ring at which an external supply of electrical power is connected to the conveyor pulley
Implementation Method 4
the temperature control system relies on the flow of externally heated fluid to heat the conveyor pulley
Data Source
AI summary
An externally driven conveyor pulley with an integrated thermal control system by which the temperature of the pulley may be controlled whether the pulley is rotating or stationary. The present invention includes a rotary connection device (or plurality of such devices) designed to transfer fluid (liquid or gaseous) or electrical current into/out of a rotating object. The rotary connection device may be a slip-ring for electrical power transfer or a rotary union for liquid transfer, but any device designed to transmit fluid or electricity into a rotating object could be utilized. In one embodiment, temperature control is achieved by transmitting temperature controlled fluids through the pulley via at least one rotary connection device. In an alternative embodiment, temperature control is achieved by transmitting electricity via the rotary connection device to a temperature regulating device in the rotating object. The temperature regulating device could be any electrical heating or cooling unit.