Gyratory Crusher Topshell Spacer Ring Locking
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Solution Overview
Problem
Conventional gyratory crusher topshell assemblies face challenges in reliably axially and rotationally locking spacer rings due to significant torque forces and installation difficulties, leading to premature failure during usage.
Innovation Solution
The topshell assembly features a radially inward tapering surface configuration for axial locking and circumferentially spaced abutment regions with bridging blocks for rotational locking, providing a strong and durable attachment mechanism that withstands crushing forces and simplifies installation and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional anchorage bolts extending through a radially outward projecting flange are used to axially and radially lock the spacer ring, then the spacer ring can be secured against axial upward movement and rotation, but the installation becomes difficult due to required closeness of fit and the mechanism fails prematurely under significant torque forces from crushing action
Solution Approach 1:
The patent inverts the conventional design by making the spacer ring radially removable from the topshell rather than requiring the topshell to be disassembled. The spacer ring is designed with a radially inwardly directed groove that receives a retaining ring, allowing the spacer ring to be installed and removed radially without disturbing the topshell structure. This inversion simplifies installation and maintenance operations while maintaining reliable locking through the retaining ring engagement with the groove.
2Reliability
If anchorage bolts are used to provide radial lock for the spacer ring, then rotation of the spacer ring is prevented, but the locking mechanism fails following only short or moderate usage due to significant torque forces
Solution Approach 1:
The patent employs curved or arcuate engagement surfaces between the retaining ring and the radially inwardly directed groove. This curvature allows for more favorable stress distribution and contact area under torque loading, improving the durability of the rotational locking mechanism. The curved geometry better accommodates the radial and tangential forces generated during crushing operation, preventing premature failure compared to conventional bolted connections.
3Reliability
If a spacer ring with outwardly projecting flange is used for axial and rotational locking, then the spacer ring can be secured to the topshell, but the mechanism is difficult to install and requires close tolerances
Solution Approach 1:
The patent segments the locking function into distinct components: the spacer ring with its radially inwardly directed groove, the retaining ring that engages the groove, and the topshell with its radially removable opening. This segmentation allows each component to be manufactured independently with standard tolerances, simplifying the manufacturing process. The assembly is simplified by allowing radial insertion of the spacer ring followed by engagement of the retaining ring, eliminating the need for complex alignment and close tolerances required in conventional bolted flange connections.
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 configuration ensures a robust and reliable locking mechanism that prevents axial and rotational movement of the spacer ring, enhancing the durability and ease of maintenance of the topshell assembly while maintaining alignment with various crushing shell geometries.
Implementation Method 1
the inclined annular surfaces provide a wedging lock effect to inhibit and indeed prevent upward axial movement displacement of the spacer ring
Implementation Method 2
a plurality of first abutment regions provided at or projecting from the rim and spaced apart in a circumferential direction around the axis to cooperate with a plurality of second abutment regions spaced apart in the circumferential direction around the axis and provided at or projecting from an annular spacer ring
Data Source
AI summary
A gyratory crusher topshell assembly in which a spacer (filler) ring is mounted radially intermediate a topshell and an outer crushing shell. The spacer ring is locked axially at the topshell via a shape profile of the mating surfaces of the spacer ring and the topshell. Additionally, the spacer ring is rotationally locked at the topshell via contact between abutments extending between the spacer ring and the topshell.