Semi Closed Frame Sugarcane Mill Headstock Design
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Solution Overview
Problem
The existing two roller sugarcane crushing mill has limitations such as a weak headstock frame, inadequate side support for the bottom roll bearing, lack of a robust locking arrangement, difficulty in assembling/dissembling the bottom roll without removing the top roll, presence of taper wedges causing stress, and insufficient provisions for imbibition/maceration liquid feeding, which affect operational convenience and extraction efficiency.
Innovation Solution
A semi closed frame design with a Pin and bush arrangement at the bottom end of the headstock frame to handle heavy loads, improved drainage paths, and the integration of imbibition/maceration liquid feeding mechanisms to enhance extraction efficiency, along with a bolting arrangement for better locking and easy assembly/disassembly of the bottom roll.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a traditional open frame design is used, then the structure is simpler and easier to manufacture, but the headstock frame strength and stability are insufficient to bear heavy and fluctuating loads
Solution Approach 1:
The frame is divided into open sections rather than being fully enclosed, creating a semi-closed design that maintains structural integrity while reducing material usage and complexity. The headstock frame includes strategic openings that preserve strength for bearing loads while simplifying the overall structure.
Solution Approach 2:
The frame incorporates composite construction with steel channels, plates, and reinforcement elements combined to create a structure that achieves high strength-to-weight ratio. The semi-closed frame uses strategically placed steel components to maintain strength while reducing overall complexity.
2Ease of operation
If taper wedges are used for bearing support, then the bearing can be easily positioned, but the headstock frame experiences increased stress and structural weakness
Solution Approach 1:
The taper wedges are completely removed from the bearing support system. Instead, the bearings are directly mounted on precision machined surfaces of the headstock frame, eliminating the stress-concentrating wedge elements while maintaining ease of bearing positioning and replacement.
Solution Approach 2:
The mechanical taper wedge positioning system is replaced with a direct mounting system using precision machined bearing surfaces. This substitution eliminates the need for wedges while providing accurate bearing positioning and reducing frame stress.
3Reliability
If the bottom roll is tightly secured with complex locking arrangements, then the roll remains stable during operation, but assembly and disassembly require significant time and effort
Solution Approach 1:
The locking mechanism is segmented into modular components including separate locking plates, bolts, and positioning elements that can be independently accessed and operated. This segmentation allows for quick assembly and disassembly while maintaining secure locking during operation.
Solution Approach 2:
The locking arrangement incorporates dynamic elements such as movable locking plates and adjustable positioning mechanisms that can be easily engaged and disengaged. The system transitions from a static complex locking structure to a dynamic system that allows quick operational changes.
4Productivity
If a single drainage location is provided, then the structure is simpler, but the extraction efficiency is insufficient due to inadequate juice drainage
Solution Approach 1:
The drainage system is segmented into multiple drainage locations and channels distributed across the frame structure. This segmentation allows juice to be collected at multiple points, improving extraction efficiency while keeping each individual drainage element relatively simple.
Solution Approach 2:
The drainage system extends into multiple spatial dimensions with drainage locations positioned at different heights and locations on the frame. This multi-dimensional drainage arrangement improves juice collection efficiency without requiring overly complex individual components.
Data Source
AI summary
An improved two roll sugarcane crushing mill with a semi closed frame having a plurality of improved two roll mill modules in tandem. Each improved two roll mill modules has a bottom roll and top roll, the bottom roll being rotatingly mounted in a pair of main frames at the two ends and the top roll is rotatingly mounted in a pair of top beams. One end of each of the top beams being pivotedly attached near the upper end of the main frame towards feed side for swinging the top beams along with the top roll. A hydraulic loader is provided which is pivotally attached between the end of the top beam and the base of the main frame. The semi closed frame fitted at the bottom end to the base of the Head Stock is designed to bear the forces of heavy and fluctuating loads.