Auxiliary Drive for Gearless Grinding Mill Maintenance
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Solution Overview
Problem
The repair and maintenance of gearless grinding mills, particularly the ring motors and shells, are difficult and time-consuming due to their complex design and operational requirements.
Innovation Solution
The implementation of an auxiliary drive system that includes a support structure, bearing, connection mechanism, and actuator, allowing for the rotation and positioning of the mill shell even when the main drive is inoperable, facilitating easier repair and replacement of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If gearless ring motors are used to rotate mill shells, then grinding efficiency is improved, but repair and maintenance difficulty increases
Solution Approach 1:
The system is divided into two independent drive systems: main drive (ring motor) for continuous operation and auxiliary drive for maintenance operations. This segmentation allows the auxiliary drive to handle maintenance tasks independently when the main drive needs repair, resolving the contradiction between high productivity and ease of repair.
Solution Approach 2:
The auxiliary drive acts as an intermediary system that enables maintenance operations on the mill shell without requiring the main ring motor to be operational. This intermediary drive system facilitates easy repair and repositioning of mill shells, directly addressing the repair difficulty issue while maintaining the high efficiency benefits of gearless ring motors during normal operation.
2Ease of repair
If the main drive is made inoperable for repair, then maintenance is required, but the mill shell cannot be repositioned
Solution Approach 1:
The auxiliary drive system is designed with multi-functionality to perform both repositioning operations during normal maintenance and positioning operations when the main drive is inoperable. This universal capability ensures that the mill shell can be repositioned regardless of the main drive status, resolving the contradiction between maintenance capability and repositioning capability.
Solution Approach 2:
The auxiliary drive serves as an intermediary mechanism that takes over the repositioning function when the main drive is unavailable. This intermediary system ensures continuous operational capability for mill shell positioning, eliminating the dependency on the main drive for repositioning operations during repair periods.
3Productivity
If the mill shell is heavy and large, then grinding capacity is improved, but handling and repositioning difficulty increases
Solution Approach 1:
The auxiliary drive system acts as an intermediary mechanical advantage system that enables easy handling and repositioning of the heavy mill shell. By providing a dedicated repositioning mechanism independent of the main drive, the system resolves the contradiction between large grinding capacity and ease of handling.
Solution Approach 2:
The manual or main-drive-dependent mechanical repositioning operations are replaced by the dedicated auxiliary drive system. This substitution provides controlled, assisted repositioning of the heavy mill shell, eliminating the handling difficulty while preserving the large grinding capacity benefits.
Data Source
AI summary
An apparatus and method relate to an auxiliary drive for rotating a gearless grinding mill.