Monitoring of operation loading of three-point linkage during ploughing

Abstract

Hujo Ľ., Tkáč Z., Tulík J., Kosiba J., Uhrinová D., Jánošová M. (2016): Monitoring of operation loading of three-point linkage during ploughing. Res. Agr. Eng., 62: 24-29.The research was focused on operational measurements of tractor plough tools and their subsequent utilisation and simulation under laboratory conditions by a hydrostatic simulator. In this field, theoretical and experimental works were focused on tractors, whereby the proposal of laboratory test arose out of the loading characteristics of the three-point linkage of the tractor. These characteristics were obtained from the agricultural tractor's operation in plough aggregation. Measurements were performed with the following tools: tractor with carrier-mounted four-mouldboard plough PH1-435 and tractor with Kuhn plough manufactured by. The subject of these measurements was to obtain the time courses of forces and pressures in the hydraulic system of the three-point linkage during ploughing with carrier-mounted and semi-mounted ploughs. For objective comparison of the obtained results during experimental measurements, we determined the characteristics of measurement conditions focused on physical and mechanical properties of the soil -bulk density, moisture, penetrometer resistance and slide strength of the soil.

Research of characteristics of environmental energy carriers by simulation of operating load in laboratory conditions

“…The flow characteristics were almost linear over the entire duration of the laboratory test. The stated flow characteristics of the hydraulic pump correspond with the measured result according to [17], during the verifying measurement of a proposed laboratory test facility for testing hydraulic pumps and transmission-hydraulic fluids. When comparing the flow characteristic of the pump after working for 0 to 25 hours, according to the Vickers test method, an increase in flow characteristic of 8,77% at a rated speed of 1500 rpm was observed.…”

“…A laboratory test facility which allows laboratory tests to be performed based on signals recorded during field tests was designed in order to simulate the operational load of the gear pump used in the tractor's hydraulic system when applying the tested ecological-hydraulic fluid [3]. Experimental set of pressure measurement with numerical simulation in engines under laboratory conditions shortens the time required for realization of operational measurements [12].…”

“…Ecological fluids used in mobile energy products operating in an environmentally sensitive environment are subject to high requirements that manufacturers have to take into account during their development in order to improve their quality while reducing the burden on the environment [1,2,3]. This is a natural consequence of efforts to increase the efficiency of production processes primarily due to a reduction in production cost, reduction in energy consumption with emphasis on reducing environmental impacts caused by production itself, but also other dependent aspects [4].…”

Construction proposal of hydraulic equipment designed to test hydraulic components and energy carriers

“…Reducing the flow efficiency of the hydraulic pump relative to the increasing pressure corresponds to the results of the work of authors Kosiba et al [11] and Tulík et al [13]. On the basis of the theoretical processing of the authors Hujo et al [7] and Kosiba et al [9] it is possible to determine the coefficient of loss of liquid k Q , which affects the resulting liquid flow.…”

“…The need for agricultural machinery to be tested from the point of view of their suitability to agricultural use will grow continuously because these machines directly affect agricultural production [4]. The measurement of hydraulic devices used in industry was also dealt by authors Simikič et al , Zastempowski and Hujo et al [5,6,7].…”