Granulator Knife Mounting Stand and Guide Bar Pivot Mechanism
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Solution Overview
Problem
Large granulator mill housings pose a challenge for single-person operation due to the weight and size of guide bars and knives, making it difficult to mount or dismount them safely and efficiently.
Innovation Solution
The design incorporates a stand with a shelf or plate for the guide bar, allowing it to be laid on and pivoted, with pins and a bead system to stabilize the weight, enabling single-handed operation and secure mounting or dismounting, and includes set screws for radial adjustment and adjustment screws for grinding compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If guide bars and knives are made large and heavy to accommodate larger granulators, then the granulator capacity increases, but the difficulty of mounting and dismounting by a single person increases
Solution Approach 1:
The guide bar is divided into two separate components: a stationary part fixed to the housing and a movable part that can be independently removed. This segmentation allows the heavy knife to be handled separately from the heavy guide bar, making mounting and dismounting feasible for a single person while maintaining the large size needed for high-capacity granulators
Solution Approach 2:
A tool with a U-shaped cross-section is introduced as an intermediary device to facilitate the mounting and dismounting of knives. This tool engages with the knife and guide bar assembly, providing mechanical advantage and leverage that enables a single person to handle the heavy components safely and efficiently
2Strength
If guide bars and knives are made heavy to provide sufficient structural strength, then the structural integrity improves, but the safety risk for single-person handling increases
Solution Approach 1:
By segmenting the guide bar into stationary and movable parts, the system maintains the structural strength and mass necessary for structural integrity while allowing the knife and movable guide bar portion to be handled independently. This reduces the weight that must be maneuvered during installation and maintenance, thereby reducing injury risk
Solution Approach 2:
The specially designed U-shaped tool acts as a mediator that provides controlled handling of heavy components. The tool's design ensures safe engagement and manipulation of the knife and guide bar assembly, reducing the risk of accidental drops or uncontrolled movements that could cause injury while maintaining the necessary structural strength
3Reliability
If fixed knives are clamped between guide bars and seats using screws, then the clamping reliability improves, but the complexity of the mounting process increases
Solution Approach 1:
The screw fastening system is extracted and separated into distinct functional elements: the stationary guide bar portion provides the mounting location, while the movable guide bar portion can be independently removed. This simplifies the mounting process by allowing the knife to be positioned and secured in steps, reducing the overall complexity while maintaining reliable clamping through the screw connection
Data Source
AI summary
A granulator mill housing for a granulator mill has a rotor (4), provided with knives, journalled therein, and seats (8) against which fixed knives (7) may be fixedly clamped by means of screws (18) and guide bars (9). At a lower seat, there is a stand (10) on which a guide bar (9) is placeable in a preparatory position. The side (13) of the guide bar, intended for cooperation with the knife (7) is turned upwards. Pivoting of the guide bar and the knife will move the knife into abutment with the seat (8). On mounting of a knife (7) against a seat (8) in a granulator mill housing, the knife and a guide bar (9) are screwed in position against the seat (8). First the guide bar (9) is placed on a stand (10), whereafter the knife is placed on the guide bar, and the guide bar and the knife are pivoted together to a mounting position with the knife in abutment against the seat (8) where screws (19) are mounted.