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Volume 23, Issue 8
Displaying 1-6 of 6 articles from this issue
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Part 2: Test Report on Coal with Large Model SiloMasatoshi KATO, Takemasa YAMADA, Tomio TAMURA, Hideto HAZE1986 Volume 23 Issue 8 Pages 561-570
Published: August 10, 1986
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSAs a storage system for granular materials, we have developed “RDM Silo Storage System.” This new concept consists of the RDM (Rotary Discharge Machine) that is manufactured for reclaiming granular materials by Louise GmbH of West Germany and concrete silos.
We carried out the experiments with an RDM Silo Pilot Plant that is on the same scale as the practical silo scale. In the previous report we proposed the test methods for the flow characteristics of coarse granular materials. This report shows the derivation of the equation for the stresses in an asymmetric hopper, and the comparsion between calculated and experimentally determined critical bridging spans at the pilot plant.
Through the experiments and analysis we confirmed that blockades in silos never take place when the properties of stored materials are fully understood, and discharge outlets are designed appropriately.View full abstractDownload PDF (1912K) -
1st Report Friction ForceHiroyuki UENO, Yuuki KANO1986 Volume 23 Issue 8 Pages 571-577
Published: August 10, 1986
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIt is important to estimate the power efficiency of the high density penumatic conveyance of solid plugs. This power efficiency is closely connected to the motion of the plugs. However, it is difficult to experimentally explain these motions. In this paper the motion of plugs is computed by the employment of the motion and continuity equations.
A small variation of the pressure difference between the rear face and the front face of one plug, has an important effect upon the motion of the plug. The amplitude of the variation in the plug velocity and air pressure in a pipe, becomes large when there is little friction force.View full abstractDownload PDF (894K) -
2nd Report Power EfficiencyHiroyuki Uneo, Yuuki Kano1986 Volume 23 Issue 8 Pages 578-584
Published: August 10, 1986
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIt is important to estimate the power efficiency of the high density penumatic conveyance of solid plugs. In this report, the power efficiency is computed by the employment of the motion and continuty equations.
The viodage of the plug and the pressure from the compressor have an important effect upon the power efficiency, but friction forces have little effect upon it.
As the total length of plug in the transport pipe increases, the power efficiency takes a high value.View full abstractDownload PDF (782K) -
Hiroshi YAMAMOTO, Ryoji UTSUMI1986 Volume 23 Issue 8 Pages 585-591
Published: August 10, 1986
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe performance of a cyclone, of which the outlet pipe was eccentric to the cyclone axis, was investigated by experiments. The inserted length of outlet pipe, the eccentric distance and direction were changed. It was found that:
1) When the eccentricity was above 10%, the pressure drops and the collection efficiency decreases.
2) When the outlet pipe was not inserted into the cyclone chamber, the pressure drop and the collection efficiency decreased more than when it was inserted.View full abstractDownload PDF (2769K) -
Yuji TOMITA1986 Volume 23 Issue 8 Pages 592-598
Published: August 10, 1986
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (702K) -
Hirofumi TAKEUCHI, Tetsurou HANDA, Yoshiaki KAWASHIMA1986 Volume 23 Issue 8 Pages 599-606
Published: August 10, 1986
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (4783K)
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