Comminution Blade Element Gradient Width Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing blade elements in comminution devices experience increased wear rates, particularly at the feed section, leading to reduced operational efficiency due to turbulent fiber material flow, causing wear on comminution parts and edge rounding.
Innovation Solution
The blade element design features a feed section that narrows from the inner to the outer edge, with comminution parts arranged at an acute angle and increasing in width towards the outer edge, and includes free spaces or grooves of constant width, enhancing strength and wear resistance near the feed section.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If comminution parts are placed close to the feed section to process fiber material, then productivity is improved, but wear rate increases due to strong turbulent flow
Solution Approach 1:
The blade element applies local quality by varying the width of comminution parts along the radial direction. Comminution parts near the feed section (inner edge) are made narrower to reduce turbulent flow impact and wear, while parts toward the outer edge are wider to maintain processing efficiency. This gradient design optimizes the balance between productivity and wear resistance at different locations.
Solution Approach 2:
The invention changes the geometric parameter (width) of comminution parts as a function of radial position. The width increases progressively from the inner edge toward the outer edge, creating a continuous parameter change that adapts the blade structure to the varying flow conditions and wear rates at different radial locations.
2Strength
If comminution parts are made wider to increase strength, then reliability is improved, but wear resistance decreases near the feed section due to turbulent flow
Solution Approach 1:
The blade element makes different parts have different widths to balance strength and wear resistance. Near the feed section where turbulent flow is strongest, comminution parts are narrower to reduce wear exposure. Toward the outer edge where flow is less turbulent, parts are wider to provide structural strength, creating an optimized gradient distribution.
3Productivity
If feed section is made wide to accommodate material flow, then productivity is improved, but wear on comminution parts increases due to turbulent flow
Solution Approach 1:
The feed section width is optimized by creating a gradient in comminution part widths from inner to outer edge. This parameter change allows the blade to handle adequate material flow while reducing the width of parts exposed to the most severe turbulent flow conditions near the feed section, thereby reducing wear.
Data Source
AI summary
A blade element (4, 8) for a comminution device (1) to comminute fiber material has at least one comminution section (22) with comminution parts (20, 24, 25, 26) and free spaces (21) therebetween, and at least one feed section (23) extending at least partly in a longitudinal direction (X) of the blade element (4, 8), each feed section (23) intended to feed fiber material to the respective comminution section (22). The comminution parts have a first dimension (d20a, d20b, d20c, d24a, d24b, d24c) extending in a circumferential direction (C) of the blade element and a second dimension (e20a, e20b, e20c, e24a, e25a, e26a) extending in the longitudinal direction (X) of the blade element. At the same longitudinal (X) position in the blade element (4, 8) the first dimension of the comminution parts is arranged to increase in the circumferential direction (C) of the blade element toward the feed section.