Bevelled Roller for Rotary Milking Platform Stress Reduction
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Solution Overview
Problem
Conventional rollers used in rotary milking platforms are prone to wear and tear, particularly at the side portions of the contact surfaces, leading to cracking and premature failure due to high stress concentrations, and are difficult and time-consuming to replace.
Innovation Solution
The roller design features bevelled surfaces on either side of the contact surface, with a convex shape and a larger angle than conventional rollers, reducing stress concentrations and distributing load more evenly, along with flange portions and a centre hole for a non-rotatable shaft, to enhance durability and ease of manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cylindrical rollers are used with flat contact surfaces, then the structure is simple and easy to manufacture, but stress concentrations occur at the edge portions leading to cracking and premature failure
Solution Approach 1:
The roller contact surface is designed with a convex curved shape instead of a flat surface. This curvature eliminates sharp edge portions and creates smooth transitions between surfaces, distributing stress more evenly and preventing stress concentrations that lead to cracking and failure.
Solution Approach 2:
The roller incorporates asymmetric features including a wider contact surface portion and narrower side portions. This asymmetric design optimizes the distribution of contact pressure and reduces stress concentrations at critical transition zones, improving overall roller reliability.
2Ease of manufacture
If rollers are designed with simple cylindrical shapes, then manufacturing is easy and cost-effective, but the side portions of contact surfaces wear out quickly and crack under high loads
Solution Approach 1:
The convex curved contact surface design eliminates sharp edges while maintaining manufacturability. The curvature distributes contact pressure more uniformly across the roller surface, reducing wear and preventing crack initiation under high load conditions.
Solution Approach 2:
The roller design features localized geometric variations with a wider central contact surface and narrower side portions. This local quality differentiation optimizes wear distribution and strengthens critical areas without requiring complete redesign of the entire roller structure.
3Ease of operation
If conventional rollers are used, then the initial setup is simple, but replacing worn out rollers is difficult and time consuming
Solution Approach 1:
The roller is designed as a modular component that can be independently replaced without disassembling the entire support arrangement. The standardized interface and simplified mounting structure enable quick removal and installation of individual rollers, significantly reducing maintenance time.
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
The invention relates to a roller of a support arrangement for a rotary milking platform. The support arrangement comprises a first rail member (4) fixedly connected to the rotary platform (1), a second rail member (5) stationarily arranged in a position below the platform (1), and a plurality of rollers arranged in a vertical space between the first rail member (4) and the second rail member (5). The roller (8) is one of said plurality of rollers, and comprises a peripheral surface (8c) comprising a contact surface (8c1) to be in contact with a contact portion (4d) of the first rail member (4) and a contact portion (5d) of the second rail member (5). The peripheral surface (8c) of the roller (8) comprises two bevelled surfaces (8c2) arranged at opposite sides of the contact surface (8c) which are located at a smaller distance (d) from a rotary axis (8g) of the roller (8) than the contact surface (8c1).