Wyniki wyszukiwania - BazTech

1

Studies of the Effect of the Shredder Design on the Material Circulation Rate in the Shredding Chamber and Its Unit Load

Zastempowski Marcin, Bochat Andrzej, Walentyn Bartosz

Advances in Science and Technology. Research Journal

|

2023

|

Vol. 17, no 5

89--103

EN

In this paper, the research procedure is presented aiming at determining the impact of selected features and design parameters of the working unit of the hammer shredder on the rate of material circulation in the shredding chamber and its unit load. The addressed issues are new and very relevant, due to their scientific and utilitarian significance. In the available literature it is not possible to find answers to the research problems formulated in the paper. For the purpose of carrying out the work, a real-scale test bed was developed and constructed, where a hammer shredder equipped with a traditional rotor design with hammers in the shape of rectangular plates and a hammer shredder equipped with a new, original rotor design with hammers in the shape of a circular section were tested. The research was conducted while grinding granular material in the form of barley grain (spring Antek). Following the analysis of the experimental results, it was concluded that the new design solution of the hammer shredder rotor is more effective than the commonly used standard design solution and may bring significant economic and technological advantages. This is due to the fact that the new design forces the lower rate of material circulation in the shredding chamber and contributes to more efficient operation of the hammer shredder.

2

Impact of cutting units’ design on biomass cutting resistance

Zastempowski Marcin, Bochat Andrzej, Janiec Maciej, Hujo Lubomir, Jablonicky Juraj

Acta Mechanica et Automatica

|

2022

|

Vol. 16, no. 3

159--265

EN

The paper presents mathematical models describing the moments of resistance to cutting on the cutting drum shafts in the biomass cutting process. The mathematical procedures described in the paper have been verified on a test stand developed and constructed by the authors, which reflects real conditions of the process of cutting plant material into pieces of specified lengths. Experimental verification proved that the developed mathematical models are adequate for drums of both cylindrical and conical constructions. The value of the average error did not exceed 13%. Following the mathematical elaboration and verification studies, the authors carried out calculations for machines currently available on the market that are equipped with drum cutting units. The calculations were carried out for the most commonly cut material, i.e. for maize, straw and green plant materials. The obtained results confirm the complexity of the problem arising from a wide range of numerical values of cutting resistance, which is contained in the range of 400–1,800 nm. The compiled database can be practically applied in the selection of machines for specific field works, and the mathematical models developed and verified in the study can be applied at the stage of designing new designs of cutting drums used in forage harvesters.

3

Wpływ konstrukcji i parametrów pracy bębnowych zespołów tnących na nierównomierność długości cięcia biomasy

Zastempowski Marcin, Bochat Andrzej

Przemysł Chemiczny

|

2020

|

T. 99, nr 3

457--461

PL

Przedstawiono wyniki badań procesu cięcia (poprzecznego i ukośnego) biomasy. Porównano nową i klasyczną konstrukcję bębnów tnących. Stwierdzono, że użycie nowej konstrukcji bębna tnącego ukośnie w stosunku do tradycyjnego bębna tnącego poprzecznie nie zwiększa w sposób istotny nierównomierności długości pociętej biomasy, co przy większej wydajności i mniejszym jednostkowym zużyciu energii rekomenduje zastosowanie nowego rozwiązania w sieczkarniach.

EN

A test stand for biomass cutting was designed and constructed. It consisted of a cutting drum and pulling-crushing roller systems which were sep. driven and controlled. An innovative cutting drum construction was used, enabling biomass slant cutting. The degree of biomass cutting non-uniformity (dry straw from winter rye) was similar to the obtained as a result of classic cross-cutting. The new design of the drum cutting assembly showed high functioning performance measured with capacity and the unit energy consumption.

4

Wpływ konstrukcji rozdrabniacza bijakowego na skład granulometryczny rozdrabnianego materiału ziarnistego

Bochat Andrzej, Zastempowski Marcin

Przemysł Chemiczny

|

2019

|

T. 98, nr 9

1499--1504

PL

Przedstawiono wyniki badań doświadczalnych procesu rozdrabniania materiału ziarnistego rozdrabniaczem bijakowym o tradycyjnej i innowacyjnej konstrukcji zespołu roboczego. Stwierdzono, że nowe rozwiązanie konstrukcyjne wirnika rozdrabniacza bijakowego pozwala na zmniejszenie szkodliwej zawartości frakcji pylistej do 7,7%, zmniejszenie zawartości frakcji drobnej do 9,2% oraz istotne zwiększenie zawartości frakcji grubej do 16,4% w rozdrobnionym materiale.

EN

Barley seeds were grinded in an improved beater mill under lab. conditions to det. the effectiveness of the barley grain shredding. Use of the new construction resulted in a decrease of the harmful dusty fraction content to 7.7%, the decrease of the content of the fine fraction down to 9.2%, and a significant increase of the content of the coarse fraction in the shredded material up to 16.4%.