Gyroscopic Effect in Machine Working Assemblies

Zastempowski, Marcin; Bochat, A.

doi:10.2478/ata-2020-0005

Cited by 5 publications

(6 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to compare the obtained research and calculation results with those available in the literature, the authors state that others have not yet analyzed the effect of the additional loading of mill working elements due to the occurrence of the spherical motion effect. Only general mathematical models in this field have been presented in the literature [16][17][18][19][20].…”

Section: Discussionmentioning

confidence: 99%

Selected Aspects of Modelling and Design Calculations of Roller Mills

2021

Self Cite

View full text Add to dashboard Cite

An analysis of construction was conducted in this study, and the guidelines for designing roller mills used commonly in the agri-food, chemical, power and construction industries were presented. Quick designing of the machines required existence of adequate mathematical models. Within the framework of the study’s realization, a mathematical model was developed and we presented the selected results of calculations of the milling rollers loading from the assembly’s mill bowl. The simulation calculations conducted with the mathematical model unambiguously show that the roller’s rotation around a fixed point considerably influences the total loading of the mill’s bowl, and passing over that phenomenon is a mistake.

show abstract

Section: Discussionmentioning

confidence: 99%

Selected Aspects of Modelling and Design Calculations of Roller Mills

2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Power transmission from the electric motor (14) through coupling (16) is transferred to the measurement system of the turning moment and rotational speed (17) and then to the gear belt transmission (7) and directly to the cutting drum (13) of a cylindrical or truncated cone type. The belt transmission (7) has the tension roll (8). The crosscut edge (6), made of steel flat bar, is also replaceable and it is used geometrically (straight or broken section) for a given shape of a cutting drum.…”

Section: Test Bedmentioning

confidence: 99%

“…Because of the point character of the studies conducted so far, they cannot explicitly determine which features and design parameters of the drum cutting assembly have a decisive impact on cutting efficiency. The Sankey power balance for chaff cutters unambiguously results in power absorption by the cutting assembly clearly dominating above the powers consumed by the machine's remaining cutting assemblies, and it amounts to 75-80% [8][9][10][11][12]. The existing design solutions for the cutting assemblies are characterized by high cutting process energy consumption and the fact (which is, in the end, connected with this) that their power transmission systems are equipped with high power engines.…”

Section: Introductionmentioning

confidence: 99%

Research Issues in the Process of Cutting Straw into Pieces

Zastempowski

Bochat

2020

Sustainability

Self Cite

View full text Add to dashboard Cite

Comparative studies of the classical and new design of a chaff cutter’s cutting drum have been conducted within the frames of the study in order to determine their functional characteristics at the time of cutting rye straw into pieces of specific length (into chaff). A classical design of a cutting drum is of the shape of a roller and is suitable for material layer cross-cutting. However, the new drum design has the shape of a double truncated cone and, with the use of it, diagonal cuts in two directions can be realized. The studies were conducted for four designs of cutting drums with cutting angles α = 0° (classical design) and α = 15°, α = 30°, and α = 45° (new design). Three indicators were applied for the assessment: capacity, unit energy consumption, and the unit cutting resistance. The obtained results show that the use of a new drum design makes it possible, depending on the assumed parameters of the cutting process and the material’s compaction degree, to increase the process’s efficiency by up to 25%, lower the unit energy consumption up to 34%, and lower the unit cutting resistance by up to 8%. The conducted experimental studies have unequivocally shown that the use of a new cutting drum design, as compared to the classical one, results in a considerable increase in the cutting process’s performance. Studies on the new design of a chaff cutter’s cutting drum, of the shape of a double truncated cone, belong to original ones that so far have not been described in the available literature.

show abstract

“…The results obtained from these experimental studies are valuable for the purposes of designing new constructions of chopper cutting units. However, in order to accelerate and optimise the design stage of the mentioned working units, it is necessary to have a verified and adequate mathematical model describing the biomass layer cutting process [8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Impact of Cutting Units’ Design on Biomass Cutting Resistance

Zastempowski

Bochat

Hujo

et al. 2022

Acta Mechanica Et Automatica

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Gyroscopic Effect in Machine Working Assemblies

Cited by 5 publications

References 12 publications

Selected Aspects of Modelling and Design Calculations of Roller Mills

Selected Aspects of Modelling and Design Calculations of Roller Mills

Research Issues in the Process of Cutting Straw into Pieces

Impact of Cutting Units’ Design on Biomass Cutting Resistance

Contact Info

Product

Resources

About