Gyratory Crusher Topshell Reinforcement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Gyratory crushers experience stress concentrations and fatigue due to loading forces, particularly in the annular topshell wall below the spider arms, leading to reduced operational lifetime and complex casting processes.
Innovation Solution
A gyratory crusher topshell design with reinforced annular walls and tapered spider arms to distribute loading forces uniformly, featuring mount bores positioned circumferentially to enhance strength and simplify casting, while maintaining compatibility with existing crusher components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the topshell is designed with uniform wall thickness to simplify manufacturing, then ease of manufacture is improved, but stress concentrations occur below spider arms reducing reliability
Solution Approach 1:
The topshell wall thickness is varied locally: thicker in regions below spider arms to withstand stress concentrations, and thinner in other regions. This non-uniform thickness distribution optimizes both structural reliability and casting feasibility, preventing fatigue and cracking while maintaining manufacturability.
2Ease of manufacture
If spider arms are designed with constant cross-section to simplify manufacturing, then ease of manufacture is improved, but stress concentrations occur at radially inner ends reducing reliability
Solution Approach 1:
The spider arms feature a tapered cross-section that is thicker at the radially inner ends where they connect to the hub, and thinner toward the outer ends. This local variation in thickness strengthens the critical connection region to withstand torsional and compressive loads while maintaining casting feasibility.
3Manufacturing precision
If complex pour feeder arrangements are used to achieve unitary casting of spider and topshell, then manufacturing precision is improved, but device complexity and casting time increase
Solution Approach 1:
The topshell and spider are cast as separate unitary components rather than as a single complex assembly. This segmentation eliminates the need for complex pour feeder arrangements required for unitary casting, while still achieving high manufacturing precision for each component individually, thereby reducing overall device complexity and casting time.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A gyratory crusher topshell having an annular shell wall that is strengthened to minimise stress concentrations and increase the topshell operational lifetime. The topshell comprises spider arms that are structurally reinforced at their radially inner regions and also comprises an annular wall that is reinforced at regions immediately below the spider arms to further increase strength and facilitate casting.