Polymer Trolley Wheel Bearing Structure for Corrosion Resistance
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Solution Overview
Problem
Trolley wheels in conveyor systems, particularly in poultry processing facilities, face issues with debris accumulation and corrosion, leading to performance degradation and maintenance challenges due to metal components and the need for frequent lubrication.
Innovation Solution
The development of trolley wheels with a polymer-based wheel body and inner race, devoid of metal components, utilizing ceramic ball bearings and a lubricant additive, which reduces friction and prevents corrosion, and features a split inner race for enhanced durability and ease of maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal races are used in trolley wheels, then structural strength and load-bearing capacity are improved, but corrosion resistance deteriorates and maintenance requirements increase
Solution Approach 1:
The patent employs composite material construction by combining polymer wheel bodies with metal shafts and bearings. The polymer components (wheel body and inner race) provide corrosion resistance while the metal components (shaft and bearings) provide structural strength and load-bearing capacity. This composite approach resolves the contradiction by allowing each material to perform where it excels.
2Duration of action of stationary object
If metal components are used in trolley wheels, then durability is improved, but debris accumulation and corrosion increase leading to more frequent maintenance
Solution Approach 1:
The patent extracts metal components from the wheel body and inner race, retaining only the central shaft and bearings where metal provides essential function. The wheel body and inner race are made entirely of polymer, eliminating the sources of corrosion and debris accumulation while maintaining durability through the inherent properties of polymer materials.
Solution Approach 2:
The patent changes the material parameter from metal to polymer for the wheel body and inner race. This material substitution fundamentally alters the chemical and physical properties, making the components resistant to corrosion and不易 to accumulate debris, thereby reducing maintenance frequency while maintaining operational durability.
3Force
If lubrication is applied to metal races, then friction is reduced, but corrosion and debris accumulation are exacerbated
Solution Approach 1:
The patent replaces the mechanical lubrication system with a self-lubricating polymer material. The polymer wheel body and inner race inherently provide low-friction surfaces through their material properties, eliminating the need for external lubricants that would otherwise attract debris and promote corrosion.
4Reliability
If polymer materials are used for wheel body and inner race, then corrosion resistance is improved, but load-bearing capacity may be reduced
Solution Approach 1:
The patent uses composite material design where polymer wheel bodies and inner races provide corrosion resistance, while metal central shafts and ceramic or steel bearings provide the necessary load-bearing capacity. The combination allows the system to achieve both corrosion resistance and adequate strength for the application.
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
The polymer-based trolley wheels offer improved durability, reduced maintenance needs, and enhanced operational performance by minimizing corrosion and debris accumulation, while maintaining exceptional bearing performance and durability under thrust forces.
Implementation Method 1
The wheel body and the inner race both comprise a polymer in combination with the trolley wheel being devoid of a metal inner race and being devoid of a metal outer race
Implementation Method 2
the first row of ball bearings is configured to roll between the first inwardly-angled inner race track and the first outwardly-angled outer race track
Data Source
AI summary
A trolley wheel for use in a conveyor system, the trolley wheel comprising a central shaft, a wheel body, first and second rows of ball bearings, and an inner race. The wheel body and the inner race both comprise a polymer in combination with the trolley wheel being devoid of a metal inner race and being devoid of a metal outer race. The wheel body defines a central rim with opposed first and second sides that respectively define first and second outwardly-angled outer race tracks. The inner race defines first and second inwardly-angled inner race tracks, such that the first row of ball bearings is configured to roll between the first inwardly-angled inner race track and the first outwardly-angled outer race track, and the second row of ball bearings is configured to roll between the second inwardly-angled inner race track and the second outwardly-angled outer race track.