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Double-layer ring die in interference fit connection for biomass particle granulator

A technology of biomass granules and granulators, which is applied in the direction of mold extrusion granulation, etc., can solve the problems of limited reinforcement effect, heavy load bearing, ring die fracture, etc., and achieve good molding effect, increased output per hour, and cost savings. Effect

Inactive Publication Date: 2009-09-30
溧阳市华生机械厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The limitations of this method are firstly that the size of the steel hoop is limited by the structure of the granulator, such as the steel hoop at the hoop, which bears a large load, but the strength cannot be increased by increasing the cross-sectional size; secondly, the pre-tightening force of the steel hoop is the same Applied to the end of the ring die, the reinforcement effect on the easily broken die hole part is limited. In the practice of pressing pellets with wood chips, the ring die with two steel hoops still often breaks

Method used

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  • Double-layer ring die in interference fit connection for biomass particle granulator
  • Double-layer ring die in interference fit connection for biomass particle granulator
  • Double-layer ring die in interference fit connection for biomass particle granulator

Examples

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Effect test

Embodiment 1

[0053] Such as figure 1 , the double-layer ring die with interference connection for the biomass granulator of the present invention adopts a hoop-type structure. That is, the radial dimension at both ends of the outer ring sleeve 2 is larger than the radial size of the area where the outer mold hole 4 is provided on the outer ring sleeve 2 .

[0054] The cylindrical mating surface between the inner ring die 1 and the outer ring sleeve 2 not only covers the part of the inner ring die 1 with the inner die hole 3 in the axial direction, but also covers the area other than the inner die hole 3 .

Embodiment 2

[0056] Such as figure 2 , the double-layer ring die with interference connection for the biomass granulator of the present invention adopts another structure of hoop type. The inner ring die 1 and the outer ring sleeve 2 respectively have two sections of interference joint surfaces with different diameters, which are stepped. The interference between the contact surfaces of two sections of cylinders is the same interference or different interference.

[0057] The cylindrical mating surface between the inner ring die 1 and the outer ring sleeve 2 not only covers the part of the inner ring die 1 with the inner die hole 3 in the axial direction, but also covers the area other than the inner die hole 3 .

Embodiment 3

[0059] Such as image 3 , The double-layer ring die with interference connection for the biomass granulator of the present invention adopts a flange structure. That is, the width of the outer ring sleeve 2 is smaller than the width of the inner ring die 1 .

[0060] The cylindrical mating surface between the inner ring die 1 and the outer ring sleeve 2 only covers the part of the inner ring die 1 with the inner die hole 3 in the axial direction, and does not cover the area other than the inner die hole 3 .

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Abstract

The invention relates to a double-layer ring die in interference fit connection for a biomass particle granulator, comprising an inner-layer ring die (1) and an outer-layer ring die (2). The outer-layer ring die (2) is in a circular sleeve structure and is made of non-quenching steel bars and provided with outer die holes (4) corresponding to inner die holes (3) in the inner-layer ring die (1) which is arranged in the outer-layer ring die (2), and the contact surfaces of the inner-layer ring die (1) and the outer-layer ring die (2) are in the interference fit connection. The invention can greatly enhance the fatigue strength of the ring die under the operation conditions of wood particle pressure and other heavy loads so as to avoid being discarded beforehand due to breaks.

Description

technical field [0001] The invention relates to the technical field of granulation machinery, in particular to a double-layer ring die with interference connection for a biomass particle granulator. Background technique [0002] Biomass pellets are one of the emerging renewable energy sources in the world. my country's biomass pellet production and application technology is gradually developing. The ring die is the core component of the biomass pellet mill. After being rolled by rollers, the raw materials for making biomass pellets are extruded through many through holes of the ring die. Due to the high molding pressure of biomass particles, the pressure of raw materials on the inner wall of the ring die is quite high during the extrusion molding process in the ring die cavity. The ring die made of ordinary all-alloy has a high probability of ring die cracking during operation. Therefore, at present, many biomass granulator ring dies adopt the method of reducing the throu...

Claims

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Application Information

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IPC IPC(8): B01J2/22
Inventor 耿福生耿振华
Owner 溧阳市华生机械厂
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