Eccentric Roller Crusher Compact Underground Design
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Solution Overview
Problem
The existing eccentric roll crushers, also known as Rotex crushers, have a compact design but face challenges in expanding their application due to limitations in adjusting the crushing gap and require significant overhead space for installation and maintenance, making them less suitable for underground mining where space is limited.
Innovation Solution
The introduction of a separate guide element attached to the crusher housing forms the entry gap, allowing for a more compact design by positioning the rocker axis lower and enabling easier maintenance, with the option to divide the crusher housing for improved accessibility and transportability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the rocker is mounted above the drive shaft axis to enable gap adjustment, then the crushing gap can be adjusted, but the overall height and overhead space requirements increase
Solution Approach 1:
The patent repositions the rocker axis from a vertical arrangement (above the drive shaft) to a horizontal arrangement (parallel to and below the drive shaft axis). This dimensional change allows the mechanism to achieve gap adjustment functionality while reducing the vertical height requirement, making the crusher more suitable for underground mining applications with limited headroom.
2Strength
If the crusher housing is designed as a single integrated unit, then structural strength is maintained, but transportation and maintenance become more difficult
Solution Approach 1:
The crusher housing is divided into separate sections (first housing section and second housing section) that can be detached from each other. This segmentation allows the crusher to maintain structural integrity during operation while enabling easy disassembly for transportation and maintenance, particularly allowing access to the roller for bearing replacement without complete disassembly.
3Loss of energy
If the roller is freely mounted on the drive shaft, then friction losses are minimized, but the roller requires significant space for rotation and maintenance access
Solution Approach 1:
The roller is positioned within the crusher housing such that it rotates in the space created by the housing structure itself. The housing sections are configured to provide necessary clearance for roller rotation and maintenance access without requiring additional external space, effectively nesting the rotational movement within the existing structural envelope.
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 results in a more compact and versatile eccentric roll crusher suitable for underground mining, allowing for efficient crushing of hard materials with reduced space requirements and simplified handling, including easy transportation and maintenance.
Implementation Method 1
the eccentric arrangement of the roll on the drive shaft creates a reciprocating movement, i.e. an eccentric oscillating movement
Implementation Method 2
Due to the free or largely free rotatable mounting of the roller on the drive shaft, there are no friction losses
Implementation Method 3
The crusher housing can be separated in the area of the roller into two crusher housing sections
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
The invention relates to an eccentric roller crusher comprising a crusher housing (1), a drive shaft (2), a roller (3) which is eccentrically and rotatably mounted on the input shaft, and a rocker (4) which can be pivoted about an axis of oscillation (S) for adjusting an outlet gap (A) between the roller (3) and the rocker (4). According to the invention, an inlet gap (E) for the crushed goods is formed by a separate guide element (5) which is separated by the rocker (4), which is secured to the crusher housing (1).