Roller Mill Axial Position Adjustment Mechanism
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Solution Overview
Problem
Existing roller mill designs have complex structures that require high manufacturing precision and are labor-intensive, with manual adjustments needed after equipment shutdown, leading to increased production time and fault risks.
Innovation Solution
A roller mill with a hydraulic axial position adjustment device and accumulator system allows for convenient adjustment of the grinding gap between grinding rollers and a grinding disk, featuring a simple structure and automatic adjustment capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an adjusting screw and elastic mechanism are mounted outside the shell, then the grinding gap can be adjusted, but the structure becomes complicated and manufacturing precision requirements increase
Solution Approach 1:
The adjusting screw is nested inside the shell rather than mounted outside. The screw thread engages with a threaded hole in the main shaft, allowing the adjusting mechanism to be integrated within the existing structure. This eliminates the need for separate external adjusting components and reduces structural complexity while maintaining the grinding gap adjustment capability.
Solution Approach 2:
The elastic mechanism is removed from the structure entirely. Instead of using an elastic mechanism to maintain grinding roller pressure, the patent relies on the gravitational force of the grinding roller itself and the friction between the roller and material to maintain contact pressure. This extraction of the elastic mechanism significantly simplifies the overall structure.
2Device complexity
If manual operation is used for regulations and adjustments, then the device structure can be simple, but labor intensity increases and production time is wasted
Solution Approach 1:
The adjusting screw mechanism allows the operator to make precise adjustments by simply rotating the screw, which automatically translates to controlled axial movement of the main shaft and precise grinding gap adjustment. The mechanism is self-contained and requires no additional power source or complex control systems, achieving ease of operation through mechanical self-service.
3Reliability
If manual adjustments are performed after equipment shutdown, then safety is improved, but productivity decreases
Solution Approach 1:
The adjusting screw is designed to be operable in both static and dynamic conditions. The threaded mechanism provides sufficient friction to maintain position during adjustment, while allowing smooth rotation when needed. This dynamic characteristic enables adjustments to be made during brief maintenance windows without requiring complete shutdown, thereby maintaining productivity while ensuring safety through controlled adjustment procedures.
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 solution simplifies the structure, reduces production costs, lowers fault rates, and enables automatic gap adjustment, saving labor and overcoming manufacturing complexities.
Implementation Method 1
an axial position adjustment device connected to the main shaft and configured to drive the main shaft to move axially to adjust a position of the main shaft. Further, the axial position adjustment device is a hydraulic cylinder
Implementation Method 2
the roller mill according to the present application further includes: a reset device configured to apply an axial restoring force on the main shaft after the main shaft moves axially. Further, the reset device includes an accumulator
Data Source
AI summary
A roller mill includes a shell provided with a feed port and a discharge port; a main shaft inserted in the shell and rotatable in the shell; a drive device drivingly connected to the main shaft a holder mounted on the main shaft two or more than two grinding rollers, each of the grinding rollers mounted on the holder and rotatable around its own axis; and a grinding disk fixedly mounted in the shell at a position opposite to the multiple grinding rollers. The roller mill further includes an axial position adjustment device connected to the main shaft and configured to drive the main shaft to move axially to adjust a position of the main shaft.