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Study on the curing mechanism of biomass and ring modes

Author: ZhouLiang
Tutor: SunYu
School: Nanjing University of Technology and Engineering
Course: Mechanical and Electronic Engineering
Keywords: biomass ring die wear finite element structure optimization fatigue analysis
CLC: TK6
Type: Master's thesis
Year: 2014
Downloads: 38
Quote: 0
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Abstract


Biomass pellet equipment has been widely used in the field of energy utilization. As a kind of typical biomass equipment, the ring pattern straw briquette machine has the advantages of high production efficiency and low cost. Combined ring die prone to wear and fatigue fracture failure is a key component of straw briquette equipment, which influences the life of the equipment. Based on the mechanism of biomass forming, this paper studies the wear characteristics, structure parameters and fatigue properties of the ring die to extend its life. The main topics are as follows:(1) The biomass forming mechanism is analyzed and the mechanics model of extrusion process is established. Energy consumption model is set up according to the mechanics model.(2) According to the wear problem of the combined ring die, Wear test research is carried out to study wear mechanism and abrasion of ring die. The results show that the wear mechanism of the ring die inlet is high stress pulverization abrasive wear.(3) Abrasive wear model concerning single granule into the space between ring die and roller is established based on wear theory. And the paper puts forward some measures about reducing the wear and tear according the abrasive wear model.(4) Different cone angles and hole patterns of the ring die are simulated to optimize the structure. The simulations show that the optimized ring die have a better structure performance.(5) Based on the established energy consumption model, double ring die pattern is raised to solve the disadvantages of single ring die pattern. Structure optimization and fatigue life analysis on the double ring die is made to show that the optimized double ring die pattern can not only improve forming production, but also the anti-fatigue properties significantly.

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CLC: > Industrial Technology > Energy and Power Engineering > Bio-energy and its utilization
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