Cone-Guided Dust Seal Assembly for Crusher Shaft Alignment
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Solution Overview
Problem
The existing dust seal assemblies for rock crushers lack self-alignment capability, leading to a labor-intensive and hazardous process during maintenance, where manual alignment of the main shaft is required, resulting in increased turnaround time and risk of injury.
Innovation Solution
A self-aligning dust seal assembly with a cone-shaped seal guide that nests onto a corresponding flange in the rock crusher machine, allowing the main shaft to be positioned without manual aid, utilizing materials with low friction and rigidity to facilitate smooth alignment and secure sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual alignment of the main shaft is required during maintenance, then the dust seal assembly can be properly positioned, but the process becomes labor-intensive and hazardous
Solution Approach 1:
The seal guide is designed with a cone shape that enables the dust seal assembly to self-align automatically when the main shaft is lowered into the rock crusher machine. The conical geometry guides the shaft into proper alignment without requiring manual intervention, making the system self-servicing during the alignment operation.
Solution Approach 2:
The cone-shaped seal guide is pre-installed on the rock crusher machine before the main shaft is introduced. This preliminary positioning structure is already in place to receive and guide the main shaft, eliminating the need for manual alignment operations during maintenance.
2Ease of operation
If manual alignment of the main shaft is required during maintenance, then the dust seal assembly can be properly positioned, but the risk of injury increases
Solution Approach 1:
The self-aligning mechanism eliminates the need for operators to manually position or guide the heavy main shaft during maintenance. The cone-shaped seal guide automatically performs the alignment function, removing personnel from hazardous positions and eliminating the safety risks associated with manual alignment operations.
Solution Approach 2:
The cone-shaped seal guide acts as an intermediary device between the main shaft and the dust seal assembly. It mediates the alignment process by providing a geometric interface that automatically guides the shaft into the correct position, replacing the need for human operators to perform this hazardous task.
3Strength
If the seal guide is made from rigid materials to enable self-alignment, then alignment forces are provided, but the surface friction must be low for smooth movement
Solution Approach 1:
The seal guide is made from rigid materials (such as steel or polyoxymethylene) to provide the necessary structural strength and alignment forces, while the contact surfaces are specifically treated or selected to have low friction properties. This local differentiation of material properties allows the guide to simultaneously provide rigid guidance and smooth movement.
Solution Approach 2:
The seal guide may be constructed from composite materials or material combinations that integrate rigidity for structural support with low-friction surface properties. This allows the single component to fulfill both the mechanical strength requirement for alignment and the low-friction requirement for smooth shaft movement.
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 self-aligning dust seal assembly reduces the risk of injury and decreases turnaround time by enabling the main shaft to be aligned automatically, improving operational efficiency and safety during maintenance.
Implementation Method 1
Both must have slippery surfaces to slide into place and move up and down, or float
Data Source
AI summary
A self-aligning dust seal assembly for rock crusher machines and particularly gyratory crusher machines has a dust seal and a seal guide that extends from the dust seal in a cone shape to enable alignment of the dust seal when the main shaft is lowered into position. The dust seal has a body portion that is disc shaped. There is an inner seal surface around the inner perimeter of the dust ring that seals against an inner element of the crusher. The seal guide extends down and outward from a connected portion with the dust seal that is proximal the inner perimeter of the dust seal. The seal guide is cone shaped and extends outward in a convex shape from the connected portion. The cone shape of the seal guide may nest on a corresponding flange that is fixed in the rock crusher machine, for example.