Gyratory Crusher Topshell Curved Profile Stress Distribution
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Solution Overview
Problem
Conventional gyratory crusher frames require additional weighty reinforcement ribs below the spider arms due to non-optimized alignment, increasing manufacturing complexity and stress concentrations during operation.
Innovation Solution
A concave section is integrated into the topshell wall, radially inward and extending from the outward facing surface, to align with the spider flange, optimizing the transfer of loading forces and minimizing stress concentrations, thus eliminating the need for additional reinforcement ribs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If reinforcement ribs are added below the spider arms to transmit axial forces, then the strength and stability of the topshell are improved, but the device complexity and weight increase
Solution Approach 1:
The invention applies curvature by forming the topshell wall with a curved profile instead of straight sections. The wall includes a first section and a second section with different orientations, creating a smooth transition zone that naturally distributes stresses without requiring additional reinforcement ribs. This curved geometry optimizes force transmission from the spider arms to the topshell while maintaining structural integrity.
Solution Approach 2:
The invention implements local quality by varying the wall thickness and orientation in specific regions. The topshell wall has a first section with a first orientation and a second section with a second orientation, with the transition zone strategically positioned to receive and distribute forces from the spider arms. This localized structural variation provides enhanced strength exactly where needed without adding complexity throughout the entire structure.
2Stability of the object's composition
If reinforcement ribs are added below the spider arms to transmit axial forces, then the stability of force transmission is improved, but the weight of the frame increases
Solution Approach 1:
The curved profile of the topshell wall creates a more efficient force transmission path. The smooth transition between the first and second sections allows axial forces from the spider arms to be distributed gradually through the curved geometry, improving stability without requiring additional mass. The curvature acts as a natural stress distributor, eliminating the need for heavy reinforcement ribs.
Solution Approach 2:
The invention changes the geometric parameters of the topshell wall by introducing a curved profile with specific orientation variations. The wall transitions from a first orientation in the first section to a second orientation in the second section, optimizing the mechanical properties for force transmission. This parameter optimization achieves stable force transmission with minimal material usage, reducing overall weight.
3Length of moving object
If the spider arms extend from the flange at the outermost perimeter to maximize opening, then the crushing zone opening is improved, but stress concentrations are created in the topshell wall
Solution Approach 1:
The curved profile of the topshell wall, with its smooth transition between sections, effectively distributes the stresses generated by the spider arms extending to the flange perimeter. The curvature prevents stress concentrations by creating a gradual transition zone that disperses forces evenly throughout the wall structure, allowing the spider arms to extend maximally without creating weak points.
Solution Approach 2:
The invention applies local quality by creating a specific structural configuration in the topshell wall where the first and second sections meet. This localized curved transition zone is strategically positioned to handle the stress loads from the spider arms, providing enhanced stress distribution exactly where the loads are applied, while maintaining the overall structural integrity and maximizing the crushing zone opening.
Data Source
AI summary
A gyratory crusher frame part includes a topshell mountable on a bottom shell, the topshell having an annular wall extending around a longitudinal axis. A spider having a plurality of arms extending radially outward from a cap is positioned at the longitudinal axis. Each arm has a first portion extending in a radially outward direction from the cap and a second portion extending in an axial direction from an outer region of the first portion. An annular flange is positioned between the second portion of each arm and the annular wall. The annular wall is defined between an outward and inward facing surface of the annular wall. A section of the wall neighboring the flange includes a concave section at the outward facing surface. A first half of the concave section closest to the flange is a substantially uniform curve extending continuously in the circumferential direction around the longitudinal axis.