<abstract xmlns="http://www.w3.org/1999/xhtml">Crawler tractor with specific loads on the hitch loses traction abilities during cornering and causes intensive destruction of the surface layer of soil. This phenomenon may be limited if relevantly selected parameters of the cornering mechanisms were applied. The objective of the paper was to determine the impact of the cornering mechanism parameters on the crawler tractor maneuver ability. The object of the research was a planetary cornering mechanism which enables fluent change of the cornering radius through the change of the rotational speed of planetary gears drive by pneumatic engines. Relations of the turning radius to the slip of the spinning and overleaping crawler at the speed of 7 km·h-1 without the load on the hitch and with the load of 40 kN were defined. The average values of drift and the turning radius as a function of drive speed from 0 to 2.5 m·s−1 on the moist soil μ=0.4 and dry soil μ=0.8 were determined. Relations of the turning radius to the pressure of oil pump oil, to the drive speed and to the load on the hitch were set forth. The research proved that when using the hydraulic pump with the regulated expense the working pressure of oil may be maximally reduced to 30 MPa, the power of the pump may be reduced by twofold, the possibility of turning in difficult field conditions within the scope of the required speed may be enabled. To ensure the required turning radius of the crawler tractor it is recommended to install the pump with the efficiency of 33 cm3·rot−1 and a regulated hydraulic motor with the capacity of 56 сm3·rot−1 with a power regulation within 2.0-2.5, at the same time maximum pressure of liquid will not exceed 35 MPa and the determined power of the hydraulic gear will amount to 52.6 kW.</abstract>

Crawler tractor with specific loads on the hitch loses traction abilities during cornering and causes intensive destruction of the surface layer of soil. This phenomenon may be limited if relevantly selected parameters of the cornering mechanisms were applied. The objective of the paper was to determine the impact of the cornering mechanism parameters on the crawler tractor maneuver ability. The object of the research was a planetary cornering mechanism which enables fluent change of the cornering radius through the change of the rotational speed of planetary gears drive by pneumatic engines. Relations of the turning radius to the slip of the spinning and overleaping crawler at the speed of 7 km·h-1 without the load on the hitch and with the load of 40 kN were defined. The average values of drift and the turning radius as a function of drive speed from 0 to 2.5 m·s−1 on the moist soil μ=0.4 and dry soil μ=0.8 were determined. Relations of the turning radius to the pressure of oil pump oil, to the drive speed and to the load on the hitch were set forth. The research proved that when using the hydraulic pump with the regulated expense the working pressure of oil may be maximally reduced to 30 MPa, the power of the pump may be reduced by twofold, the possibility of turning in difficult field conditions within the scope of the required speed may be enabled. To ensure the required turning radius of the crawler tractor it is recommended to install the pump with the efficiency of 33 cm3·rot−1 and a regulated hydraulic motor with the capacity of 56 сm3·rot−1 with a power regulation within 2.0-2.5, at the same time maximum pressure of liquid will not exceed 35 MPa and the determined power of the hydraulic gear will amount to 52.6 kW.

Effect of Steering Gear Parameters of Crawler Tractor Cornering Ability

Belorussian National Technical University, Republic of Belarus

Institute of Agricultural Engineering and Informatics, University of Agriculture in Kraków

Department of Agricultural and Forest Machinery, Warsaw University of Life Sciences - SGGW

Agricultural Engineering

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Effect of Steering Gear Parameters of Crawler Tractor Cornering Ability"}

Crawler tractor with specific loads on the hitch loses traction abilities during cornering and causes intensive destruction of the surface layer of soil. This...

Effect of Steering Gear Parameters of Crawler Tractor Cornering Ability

Data publikacji: 02 sie 2016

Zakres stron: 159 - 169

Otrzymano: 01 maj 2015

Przyjęty: 01 gru 2015

DOI: https://doi.org/10.1515/agriceng-2016-0038

Słowa kluczowe
crawler tractor, planetary steering gear, steering radius, cornering ability, hydrostatic transmission, pump, hydraulic motor

© 2016 Cheslav Zhdanovich et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Effect of Steering Gear Parameters of Crawler Tractor Cornering Ability

Data publikacji: 02 sie 2016

Zakres stron: 159 - 169

Otrzymano: 01 maj 2015

Przyjęty: 01 gru 2015

DOI: https://doi.org/10.1515/agriceng-2016-0038

Słowa kluczowecrawler tractor, planetary steering gear, steering radius, cornering ability, hydrostatic transmission, pump, hydraulic motor

© 2016 Cheslav Zhdanovich et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Słowa kluczowe
crawler tractor, planetary steering gear, steering radius, cornering ability, hydrostatic transmission, pump, hydraulic motor