Wyniki wyszukiwania

1

Uniwersalny termometr termistorowy

100%

Grochowicz M.

Roczniki Gleboznawcze

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1975

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tom 26

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nr 3

2

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Wyznaczanie parametrow plastycznego plyniecia sypkich surowcow spozywczych

63%

Horabik J., Grochowicz M.

Acta Agrophysica

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2000

|

tom 37

29-38

W pracy podjęto próbę wyznaczania parametrów plastycznego płynięcia wybranych sypkich surowców spożywczych charakteryzujących się dużym stopniem rozdrobnienia i dużą podatnością na zagęszczanie. Pomiary przeprowadzano w aparacie bezpośredniego ścinania Jenike'go. Zastosowana procedura wielokrotnego ścinania umożliwiała wykonanie od 4 do 7 ścięć tej samej próbki przy coraz mniejszych wartościach naprężenia normalnego. Dzięki temu zmniejsza się znacznie pracochłonność testu w porównaniu do klasycznej procedury Jenike'go. W pracy określono zależność warunku plastyczności, efektywnego kąta tarcia i funkcji płynięcia od naprężenia normalnego dla mąki pszennej, kaszy manny i cukru pudru.

3

Methodology of determination of the internal friction coefficient of grain layer at increased strains

63%

Haman J., Grochowicz M.

Zeszyty Problemowe Postępów Nauk Rolniczych

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1978

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tom 203

4

Adjustment of grain combine harvester assemblies to decrease damage and quantitative losses of rape seeds during one-stage harvest

63%

Grochowicz M., Szpryngiel M.

Zeszyty Problemowe Postępów Nauk Rolniczych

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1995

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tom 427

41-44

A standard grain combine harvester in its factory version causes great losses and damage of rape seeds during harvesting. These losses are resulting from a different reaction of rape plants from that of cereals to the operation of combine working elements. In the course of many years invetigations the sources and causes of these losses have been determined. A technology of harvesting, which allowed to decrease quantitative losses and seed damages was elaborated. An adequate combine adaptation and optimum selection of working parameters of its assemblies for the actual physical state of canopy, varieties, time of harvesting and agrometeorological factors have been made.

5

Strength characteristics and dilatation of food powders

63%

Horabik J., Grochowicz M.

International Agrophysics

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2002

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tom 16

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nr 3

6

Determination of the reasons for rapeseeds losses at combine harvesting and some methods of their limitation

51%

Szot B., Tys J., Szpryngiel M., Grochowicz M.

Zeszyty Problemowe Postępów Nauk Rolniczych

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1991

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tom 389

7

Zrodla uszkodzen nasion rzepaku podczas zbioru kombajnem

51%

Szpryngiel M., Grochowicz M., Szot B.

Zeszyty Problemowe Postępów Nauk Rolniczych

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1995

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tom 423

215-221

W kombajnie zbożowym ZO56 Bizon-Super, wytypowano pięć miejsc, i których pobierano próbki w celu określenia źródeł powstawania uszkodzeń nasion w taki sposób, aby uzyskane rezultaty jednoznacznie określały wpływ poszczególnych podzespołów i ich parametrów pracy na stopień uszkadzenia nasion rzepaku. Ocenie uszkodzeń poddawano nasiona stanowiące reprezentatywną próbkę całej partii nasion pobranych w poszczególnych punktach pomiarowych, w sposób losowy. Określano makro i mikrouszkodzenia oraz połówki. W pracy przedstawiono rozkład uszkodzeń występujących na wybranych zespołach kombajnu.

8

Tarcie ziarna pszenicy

51%

Molenda M., Horabik J., Grochowicz M., Szot B.

Acta Agrophysica

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1995

|

tom 04

88

All phases of particulate material industry, namely, storage, handling and processing are operations that require precise knowledge of the behaviour of the material to achieve the desired control.External and internal friction of particulate material greatly influence its mechanical behaviour.A lot of work was done on agricultural grain since 1960`s. This work summarizes the methods and results of these studies and presents the results of the autor1s own experiments. It was divided into two parts: 1.Internal friction and 2. External friction. Own studies for the first section were performed using direct shearing box and triaxial compression chamber which dimensions were anlarged to regard the size of cereal grain. Density, moisture content of grain and its spatial orientation were taken into account as the most important factors forinternal friction. All of them were found to influence significantly the angle of internal friction of grain. For the external friction section own method of measurements was applied. Friction coefficient was measured for a part of wheat grains sliding against a steel or glass platesandwiched between them. The true contact area of grain with a flat glass surface was measured with microscope photography in reflected light. The relations between tangential force and normal force on the one hand and the true contact area versus normal force on the other were obtained and examined. Parameters taken into account were: grain moisture content, type of endosperm, cutin cover, variety, location of cultivation, and roughness of sliding surface and that of grain itself. All these factors were found to influence significantly obtained frictional characteristics. The obtained results pointed out to the fact that both internal and external friction of cereal grain depend on a number of factors which caused unexplained scatter of experimental results, and in a greater part of theoretical works were left out of account.

9

Sources and causes of rape seed damage during combine harvesting

51%

Szpryngiel M., Grochowicz M., Szot B.

Zeszyty Problemowe Postępów Nauk Rolniczych

|

1995

|

tom 427

27-33

Areas were marked in Bizon-Super grain combine-harvester, from which sampling of rape seed was made to determine the sources of seed damage. This was done in such a manner that the results obtained could clearly define the effect of different combine assemblies and their parameters on the degree of damage of rape seeds. The evaluation of damage concerned seeds which consisted representative sample of the whole lot of seeds uptaken from the individual measurement points, at random, with division into macro- and microdamage as well as halves of seeds. The investigations were carried out during three successive yean on seven varieties of winter rape. In this paper the distribution of damage which appear in the chosen combine assemblies, at different parameters of their work and in two cropping terms is presented.

10

Zastosowanie aparatu trójosiowego ściskania do badania właściwości mechanicznych ośrodków rozdrobnionych pochodzenia roślinnego

51%

Grochowicz M., Horabik J., Molenda M.

Zeszyty Problemowe Postępów Nauk Rolniczych

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1987

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tom 320

11

Necessary adaptations of combine for rape harvesting

51%

Szot B., Grochowicz M., Szpryngiel M., Tys J.

Zeszyty Problemowe Postępów Nauk Rolniczych

|

1995

|

tom 427

35-39

This paper shows how even small adaptations and adjustments in a grain combine harvester can cause a significant decrease of rape seed losses during harvesting to the level of about 3 %. For this reason, the following were introduced: an extended header floor, an active canopy divider, tailings sieve and lower sieve of the grain pan with a changed design. The above mentioned adaptations and suitable adjustment of combine assemblies in connection with the knowledge of the strength properties of siliques and the physical state of canopy, allow to reduce seed losses to the level of about 3 %.

12

Formation of shear band in a granular material during triaxial compression test

51%

Horabik J., Lukaszuk J., Grochowicz M.

International Agrophysics

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2000

|

tom 14

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nr 3

Ograniczanie wyników

7 Zeszyty Problemowe Postępów Nauk Rolniczych

2 Acta Agrophysica

2 International Agrophysics

1 Roczniki Gleboznawcze

12 Grochowicz M.

5 Horabik J.

5 Szot B.

5 Szpryngiel M.

2 Molenda M.

2 Tys J.

1 Haman J.

1 Lukaszuk J.

1 2002

2 2000

5 1995

1 1991

1 1987

1 1978

1 1975

Uniwersalny termometr termistorowy

Wyznaczanie parametrow plastycznego plyniecia sypkich surowcow spozywczych

Methodology of determination of the internal friction coefficient of grain layer at increased strains

Adjustment of grain combine harvester assemblies to decrease damage and quantitative losses of rape seeds during one-stage harvest

Strength characteristics and dilatation of food powders

Determination of the reasons for rapeseeds losses at combine harvesting and some methods of their limitation

Zrodla uszkodzen nasion rzepaku podczas zbioru kombajnem

Tarcie ziarna pszenicy

Sources and causes of rape seed damage during combine harvesting

Zastosowanie aparatu trójosiowego ściskania do badania właściwości mechanicznych ośrodków rozdrobnionych pochodzenia roślinnego

Necessary adaptations of combine for rape harvesting

Formation of shear band in a granular material during triaxial compression test