The accelerated laboratory test of biodegradable fluid type "ertto"

Tkáč, Zdenko; Majdan, Radoslav; Drabant, S.; Jablonický, Juraj; Abrahám, Rudolf; Cvíčela, P.

doi:10.17221/26/2009-rae

Cited by 11 publications

(9 citation statements)

References 3 publications

(3 reference statements)

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“…In this way, pressure load conditions at the outlet of the tested hydraulic pump are changed in a cyclical manner. The test bench was designed according to works published by Jobbágy et al (2003), Kučera et al (2005), Mihalčová and Hakim (2008, 2009), and Tkáč et al (2010. Fig.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of tractor biodegradable hydraulic fluids on the basis of hydraulic pump wear

Majdan¹,

Tkáč²,

Kosiba³

et al. 2013

Res. Agric. Eng.

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Majdan R., Tkáč Z., Kosiba J., Abrahám R., Jablonický J., Hujo Ľ., Mojžiš M., Ševčík P., Rášo M., 2013. Evaluation of tractor biodegradable hydraulic fluids on the basis of hydraulic pump wear. Res. Agr. Eng., 59: 75-82.Two types of biodegradable hydraulic fluids (HEES and HEPR) with the mineral oil-based hydraulic fluid (HV) were compared. The tests were performed using a test bench. During the tests with a tractor hydraulic pump, the fluids were loaded by a cyclic pressure load. The tests of fluids were evaluated on the basis of wear of the pump. Evaluation parameters were the flow characteristics of the pump and the cleanliness level of tested fluids. The temperature of the fluid under which the test was performed was measured in real operating conditions of the Zetor Forterra 11441 tractor. It is possible to state upon the test results that the mineral oil-based fluid was classified in the first place, the biodegradable fluid of the HEPR type in the second place, and the biodegradable fluid of the HEES type received the last position.

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Section: Methodsmentioning

confidence: 99%

Evaluation of tractor biodegradable hydraulic fluids on the basis of hydraulic pump wear

Majdan¹,

Tkáč²,

Kosiba³

et al. 2013

Res. Agric. Eng.

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“…These working conditions can have negative consequences for the contamination of working fluids. 5,6 Agricultural engineering requires continuous improvement of the service life and reliability of machinery. 7 The choice of working fluid is influenced by its required physic-chemical properties, from the point of view fluid use, and ensuring operating conditions.…”

Section: Introductionmentioning

confidence: 99%

Laboratory tests of the hydraulic pump operating load with monitoring of changes in the physical properties

Hujo

Nosian

Zastempowski

et al. 2021

Measurement and Control

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The present article deals with the physical properties monitoring of the transmission-hydraulic fluid, and changes of those properties due the operating load of the hydraulic pump in laboratory conditions. Tests of the transmission-hydraulic fluid were performed in laboratory conditions with the simulation of the operating load, so as to simulate the real conditions under which hydraulic circuit of the agricultural tractors operates. The universal transmission-hydraulic fluid was subjected to analysis, where the samples of the fluid were taken sequentially according to the chosen methodology at intervals of 250 and 500 h. The results of the present article include the evaluation of the physical properties of the fluid and the flow efficiency change of the hydraulic pump after 250 and 500 h of operation, while simulating the operation load. Based on a laboratory test, we found that after working for 500 h, the dynamic viscosity of the examined hydraulic fluid at 40°C decreased by 2.92 mPa.s and at 100°C decreased by 0.64 mPa.s. When determining the kinematic viscosity of the hydraulic fluid after working for 500 h, we recorded its decrease, namely, at a temperature of 40°C by a value of 3.37 mm2/s and at a temperature of 100°C, its value decreased by 0.77 mm2/s. In the analysis of the test oil samples, we found that the level of water contamination of the hydraulic fluid decreases with increasing number of hours worked. Specifically, the water concentration in the hydraulic fluid decreased by 0.031%. At the same time, we recorded a slight decrease in the flow efficiency of the hydraulic pump, specifically by a value of 0.03% after 500 h worked. After working 500 h, we found that the range of abrasion particles in the transmission-hydraulic fluid is within the prescribed range, which is determined by the standard D6595-00.

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“…Biodegradable oil was chosen as a lubricant for tribological node. The oil was selected based on the experiments within laboratory as well as real conditions (Kosiba et al, 2013;Kučera et al, 2010;Majdan et al, 2010;Tkáč et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Experimental Comparison of the Tribological Properties of Selected Surfaces Created by Thermal Spraying Technology

Tóth¹,

Haas²,

Rusnák³

et al. 2016

Acta Univ. Agric. Silvic. Mendelianae Brun.

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The scientific article titled “Experimental comparison of the tribological properties of selected surfaces created by thermal spraying technology” deals with the surface condition of selected pairs working within the mixed friction before and after experimental tests. Based on the chosen methodology, the experimental tests were performed on the Tribotestor M’06 testing machine. The ecological oil MOGUL HEES 46 (manufactured by Paramo) was used as a lubricant. The tests were performed on selected material pairs. The first friction element was a shaft of steel 14 220. The second friction element was a steel plate of steel 11 373 with a friction surface created by two materials, i.e. CuSn10 and NP 40. The results are statistically elaborated and illustrated in figures and tables.

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The accelerated laboratory test of biodegradable fluid type "ertto"

Cited by 11 publications

References 3 publications

Evaluation of tractor biodegradable hydraulic fluids on the basis of hydraulic pump wear

Evaluation of tractor biodegradable hydraulic fluids on the basis of hydraulic pump wear

Laboratory tests of the hydraulic pump operating load with monitoring of changes in the physical properties

Experimental Comparison of the Tribological Properties of Selected Surfaces Created by Thermal Spraying Technology

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