Press Roller Segment Clamping with Reinforced Shoulders
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Solution Overview
Problem
Press rollers used in roller presses for hot briquetting or compacting experience significant wear due to high temperatures, leading to reduced stability and durability of segments, which affects their service life.
Innovation Solution
The segments are equipped with external material reinforcements on their end faces and clamping shoulders, featuring pocket-like indentations for localized clamping, and axially parallel clamping bolts are used to enhance stability, allowing for a form-fitting connection with the roller core, eliminating the need for grooves and projections that can be weak points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If segments are equipped with conventional fastening rings that engage over clamping shoulders, then the segments can be detached and replaced, but the stability and durability of segments under high loads and temperatures are insufficient
Solution Approach 1:
The roller shell is divided into multiple detachable segments that can be independently replaced. Each segment is equipped with localized material reinforcements and pocket-like indentations that work with the fastening ring to provide both ease of replacement and high stability under load.
Solution Approach 2:
Material reinforcements are strategically placed at specific locations on the segments (at the end faces and clamping shoulders) rather than uniformly across the entire segment. This localized reinforcement provides enhanced stability and durability precisely where the highest stresses occur during operation.
2Ease of manufacture
If clamping bolts are arranged in grooves on end faces between adjacent segments, then the segments can be fastened, but grooves and projections create weak points that reduce segment stability
Solution Approach 1:
The clamping bolts are extracted from the end face area and repositioned to clamp the segments from the sides. This removes the need for grooves and projections on the end faces, eliminating the weak points they created while maintaining effective clamping.
Solution Approach 2:
The clamping action is moved from a two-dimensional arrangement on the end face to a three-dimensional arrangement where bolts clamp from the sides. This dimensional change allows effective fastening without creating weak points on the critical end face surfaces.
3Adaptability or versatility
If segments are subjected to high temperatures during hot briquetting or compacting, then the processing of materials like reduced iron ores is enabled, but wear and stability of segments deteriorate
Solution Approach 1:
The segments are constructed with composite structure featuring base segment material combined with localized material reinforcements. This composite construction provides enhanced wear resistance and thermal stability while maintaining the ability to process hot materials like reduced iron ores at temperatures up to 900°C.
Data Source
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AI summary
The invention relates to a press roller for a roller press, in particular for briquetting, compacting or grinding granular material, having a roller core (1) and a roller sleeve fastened to the exterior of the roller core (1), said sleeve being composed of a plurality of segments (2), distributed over the circumference, with mutually facing lateral faces (3). The segments (2) have clamping shoulders (5) which extend around the front faces and have first clamping surfaces (8). The segments (2) are releasably fastened at each front face to the roller core (1) by means of at least one fastening ring (6), said fastening ring fitting over the clamping shoulders (5) of the segments (2). The front faces (12) and/or clamping shoulders (5) of the segments (2), in the front face edge regions associated with the lateral faces (3), have outer material reinforcements (13) which protrude outwardly relative to the first clamping surface (8) in the radial direction and/or relative to the front face (12) in the axial direction and define, together with the clamping surfaces (8), pocket-type recesses (14) in between them in the circumferential direction, second clamping surfaces (9) of the fastening ring (6) resting against said pocket-type recesses.