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Volume 19 (1957 - 195･･･
- Issue 4 Pages 129-
- Issue 3 Pages 89-
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Volume 19, Issue 4
Displaying 1-13 of 13 articles from this issue
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Y. CHUMA1958 Volume 19 Issue 4 Pages 129-132
Published: March 18, 1958
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSApplying the cylinder head with various sizes of leakage-hole, the effect of the leakage of working gas upon the faculty of the air-cooled 2 cycle engine and the water-cooled 4 cycle diesel engine under various running conditions were investigated, and the following results were
[A] As for an air-cooled 2 cycle gasoline engine;
(1) The consumption of fuel increases with the enlargement of leakage hole. In comparison with the diesel engine, the remarkable variation of the thermal efficiency due to the change of load takes place. Maximum thermal efficiency under the leakage conditions occurs at the partial load of 3/4.
(2) The liner relation is found between the maximum H. P. and the cross-sectional area of the leakage hole.
(3) The engine stops under the fuel supply of 600gm/hour, when the area of the leakagehole attains to 3.5mm2.
(4) The thermal efficiency accompanied with leakage decreases under every load, exceedingly near the full load.
(5) The temperature of plug-sheet risesand that of exhaust gas falls with the enlargement of leakage hole.
[B] As for a water-cooled 4 cycle diesel engine;
(1) The temperature of hopper-water rises with either the increase of leakage area or that of burdened load. The leakage of the hole the diameter of which is 2.0mm has the same effect on the temperature rising as partial load of 3/4.
(2) Thermal efficiency increases progressively from starting until the thermal condition of cylinder becomes stable. Thermal efficiency becomes stable more quickly with the increase of the leakage as well as the load.
(3) The temperature of exhaust gas rises higher and becomes stable more quickly when the leakage as well as the load increases.View full abstractDownload PDF (674K) -
Soil Deformation by the Sinking of the WheelT. TANAKA1958 Volume 19 Issue 4 Pages 133-137
Published: March 18, 1958
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe results of the soil deformations, when the tractor wheel passes on the field soil, were obtained by the experiments used the cylindrical loads like the road roller in the glass box.
(1) When we plot the relations of the sinking degree against the loads on the graph sheet, the curves become the parabola, and that streight lines on the log-log paper have the inclinations decided by the moisture percentage in the soil. When the soil has little moisture, the sinking degree per unit load decreases with the load increasing.
(2) When the cylindrical loads are charged on the compressible soil the soil particles under the cylinder moves for the direction of the load, and the soil detached from the vertical center line of the cylinder moves for the fan shaped direction.
(3) But, after these soil particles are all compacted, the uncontinuous line, named slip line, springs up in the soil.
(4) As the soil contain the more water, the compressibility of the soil decreases and the soil has the fluidity. Then each point in the soil moved along the slip line above mentioned.
(5) In general the soil particles charged the cylindrical loads on it, move along the certain line decided by it's nature. It is supposed that the shape of the curve of the slip line are the characteristic curves of the differential equation of the soil deformation.View full abstractDownload PDF (5803K) -
R. MATSUDA, T. MATSUYAMA, T. SERIZAWA, S. OGATA, H. MORISHIMA1958 Volume 19 Issue 4 Pages 138-142
Published: March 18, 1958
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn order to make clear the practical efficiency of motor tiller in paddy field, authers carried this investigation on Yoshino village near Kawagoe City.
On tilling and harrowing of paddy field before rice planting, the efficiency is lower than figures in testing field of experiment station, because condition of irrigation water, land, operating system and technique of machine handling have influence upon. From this investigation, we knew that motor tiller have about 2.5 hours/one tan as a practical efficiency in this district.View full abstractDownload PDF (967K) -
1958 Volume 19 Issue 4 Pages 142-142,158
Published: March 18, 1958
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (557K) -
S. MASUDA, R. TAKEUCHI, I. NISHIMURA1958 Volume 19 Issue 4 Pages 143-144
Published: March 18, 1958
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSTo measuring drawbar pull of garden-tractors, we made a small dynamometer car. The car is equipped with an air-compressor driven by a 2h. p. air-cooled engine, and an air-brake cylinder operated by tramcar type control valve. Any variable load can be applied on the testing tracter. A hydraulic type traction dynamometer is also attached to the car. The recording unit operated by a land-wheel, marks drawbar pull, No. of rotation of driving wheel and time mark per second, on a recording-paper. Then we can compute easily traction efficiency, coefficient of traction, slippage of driving wheel, running distance, and travel speed, etc. A few field-test results are shown on this paper, but other tests will be reported next time.View full abstractDownload PDF (1920K) -
Field Test Carried out on the HR 561 Type Power HarvesterH. EZAKI, K. OKUI, M. IRIE1958 Volume 19 Issue 4 Pages 145-148
Published: March 18, 1958
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn 1956, we designed and constructed a small type harvester to make and drop out sheaves. (a small type dropper)
This harvester is equipped with a reciprocating cutter bar, star wheels and V belts to collect growing crops and to convey the cut crops, a divider which stops intermittently the conveyance of cut crops to make the sheaf of crops, a beater to drop out the sheaf on the field, a door which opens at same time with action of the beater.
It runes by a single line endless rail.
These are driven by a 2.5_??_ engine through ransmissions as shown in Fig 1.
We have found next results on field test.
(1) The conveying mechanisms are efficient for harvesting the crops stood upright except inclined crops.
(2) The divider acts fairly well, but not completely.
(3) The beater and door work thoroughly only when cut crops are convyieed and divided sufficiently.
(4) The single line endless rail showed good capacity for both dry and wetty field, as it run on cut stems.
(5) The new dropper type harvester is useful than windrower type harvester that we made last year, for gathering and binding crops.View full abstractDownload PDF (2552K) -
M. ISOBE, S. ISOBE1958 Volume 19 Issue 4 Pages 149-153
Published: March 18, 1958
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe properties of corrosion resistance of metallic materials, such as, pure copper, brass, bronzes, duralumin and metallic aluminium to some chemical manures were studied, respectively. As the chemical manures, one per cent and five per cent solution of urea, ammonium sulphate, potassium nitrate, potassium phosphate di-basic, and one per cent and five per cent liquid of calcium perphosphate, and twinty per cent ammonium water were used, respectively.View full abstractDownload PDF (912K) -
S. TSUNEMATSU, T. OKAMURA, T. OTA1958 Volume 19 Issue 4 Pages 154-158
Published: March 18, 1958
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe inclined-plate cell type seed-metering device has a point of excellence that seed is dropped easy and certainly.
The experiments for drill seeding of segmented beet seed by this device was conducted and was found as follows.
1) It should be given the sufficent revolution to easy drop the seed, and it is 24-30r.p.m.
2) When the revolution of plate was too low, seeding results are not satisfactory by the reason of influence of seed cell interval.
3) The depth of seed cell should be given as deep as the seed diameter. For this reason we can not revolute the plate too high speed, as the higher the revolution, the shallower the cell depth should be.
4) This device must be reconstructed that seeding quantity may be adjusted more fine.View full abstractDownload PDF (1375K) -
On the Relations between the Physical Property and Fluidity of FertilizerM. WAKUI1958 Volume 19 Issue 4 Pages 159-162
Published: March 18, 1958
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSNine Kinds of fertilizers were investigated about the elementary physical property and fluidity, as one experiment of improvement studies of fertilizer distributors. The results obtained may be summarized as follows:
1. The flowing speed of fertilizer from the very narrow hole is chiefly affected by the size of particles.
2. There is found high significant correlation between fluidity and the angle of repose of fertilizer, in case of flowing out of a vertical round tube. The smaller this angle is, more the fluidity is.
3. The angle of repose varies chiefly by specific gravity, coefficient of shape and moisture content of fertilizer.
4. Experimented fertilizer can be classified into six groups, concerning to each fluidity and absorptiveness of water.View full abstractDownload PDF (650K) -
On the Momentum and Energy of Sprayed ParticlesM. IMAI, T. TAKENAGA, H. NAKAGAWASAI1958 Volume 19 Issue 4 Pages 163-166
Published: March 18, 1958
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn this report, We studied the momentum and energy on sprayed particle of agricultural chemicals by motor sprayer.
The first, we took that the spreading diameters of the particle to each fall distance from nozzle, spreading angles on nozzle tip to each fall distance, discharge of agricultural chemicals from nozzles on each spraying pressures, and mean diameters of spraying particles on each nozzles were fig 2, fig 3, fig 4 and fig 5.
The other, we calculated the formula of displacement, velosity, momentum and energy on sprayed particle used by stokes' theorem, as follow—
x=(γp-γa)dp2/18μt+dp2γp/18μg
[Vcosθ-(γp-γa)/18μdp2](1-e-18μg/dp2γpt)
vx=(γp-γa)dp2/18μ
+[Vcosθ-(γp-γa)/18μdp2]e-18μg/dp2γpt
Mx=πdp3γp/6g{(γp-γa)/18μdp2
+[Vcosθ-(γp-γa)18μdp2]e-18μg/dp2γpt}
Ex=πdp3γp/12g{(γp-γa)/18μdp2
+[Vcosθ-(γp-γa)/18μdp2]e-18μg/dp2γpt}2
x, θ: cf fig 1. dp: Dia. of particle, cf fig 5. γp, γa: Specific gravity of particle and air. μ: coeff. of viscosity. t: time, g: acceleration of gravity. V: Initial velosity on nozzle tip. (y direction same x)
So we took the practical results of them as fig 6 and fig 7, applied the data of fig 2-fig 5.
In this case we were known the same aspect in the results of calculating and measuring on spreading diametrs as fig 8.View full abstractDownload PDF (534K) -
F. SHOJI, F. SANO1958 Volume 19 Issue 4 Pages 167-170
Published: March 18, 1958
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSBy means of high-speed kinematography taking about 900 photographs per second, anthers studied on the process of threshing a rice-ear with threshing cylinder. The summary of conclusion reached from this experiment follows: (1) the time required for threshing an ear is assumed to be about 1/100-2/100 second, (2) in threshing function there are two kinds; one is the action that the teeth directly strike against an ear while touching, and the other is the action that the grains are shaken off on the occasion of swinging ears, (3) ears are forced to be oscillated by advancing teeth and threshed materials are scattered fairly to side direction.View full abstractDownload PDF (802K) -
On the Dust Elimination EquipmentsC. NAKAMURA1958 Volume 19 Issue 4 Pages 171-173
Published: March 18, 1958
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESS1. The dust generated under hulling-work, not only ruins worker's health but also spoils mechanical function.
There upon, we devised, as its counter-measure, the dust elimination equipment that was manufactured in trial and then tested some experiments on it.
2. We observed the direction of air current in side same time measured the distribution of wind velocity within and without.
3. To show the effect of dust elimination, we temporally use the word dust elimination efficiency
η%=(q/Q)×100……(1)
Note: η……Duste limination efficiency
Q…The whole quantity of dust eliminated(g)
q…The quanty eliminated from all the dust generated(g)
4. By substituting the figures obtained of experiment in formule (1) we verified that its effect was great, the dust elimination efficiency representing 87.5% or an average.View full abstractDownload PDF (2224K) -
1958 Volume 19 Issue 4 Pages 175
Published: 1958
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (201K)
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