Aircraft Hydraulic Pump Tests with Advanced Fire-Resistant Hydraulic Fluids

In environmental terms, hydraulic fluids used in the hydraulic system of municipal vehicles represent problems related to a potential leakage from the system into the environment and the subsequent contamination of groundwater and soil. More environment-friendly way is to use green hydraulic fluids that are biodegradable in accidents. This paper aims to investigate the possibilities of biodegradable oil application and its adaptation in the hydraulic systems of municipal vehicles by monitoring the impact of the bio-oil Mobil EAL 46 ESSO on the performance parameters as flow, efficiency, durability, etc. Hydraulic pump revolutions were measured using a non-contact sensor based on the principle of magnetic induction change. Method of tightness monitoring was used to achieve results for functionality and wear of the hydraulic system. During 600 h of the test period no significant deterioration of performance parameters was detected. Results are useful for companies involved in waste collection.

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

MATEC Web of Conferences ◽

10.1051/matecconf/201930201020 ◽

2019 ◽

Vol 302 ◽

pp. 01020

Author(s):

Jozef Nosian ◽

Marietta Markiewicz ◽

Romana Janoušková ◽

Patrícia Feriancová

Keyword(s):

Hydraulic Systems ◽

Hydraulic Pump ◽

Laboratory Equipment ◽

Energy Carriers ◽

Hydraulic Equipment ◽

Hydraulic Fluids ◽

Measurement And Testing ◽

Test Individual ◽

Over Time ◽

Agricultural Machines

The aim of the present article is the construction of a device for measuring and testing hydrostatic converters and subsequent verification measurement of the proposed device. This device will allow the measurement and testing of hydraulic pumps under laboratory conditions. In our case, we will test the hydraulic pump UD–25R, which is used in hydraulic drives of agricultural machines. Last but not least, the device described in the article can be used to test individual energy carriers used in hydraulic systems. The described device can simulate conditions that occur in operation. Using verification measurements we have proved that the designed laboratory equipment is suitable for testing hydraulic components and also allows monitoring and testing of the properties of individual hydraulic fluids. The measurement will result in a change in flow rate over time.

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

Research in Agricultural Engineering ◽

10.17221/18/2012-rae ◽

2013 ◽

Vol 59 (No. 3) ◽

pp. 75-82 ◽

Cited By ~ 3

Author(s):

R. Majdan ◽

Z. Tkáč ◽

J. Kosiba ◽

R. Abrahám ◽

J. Jablonický ◽

...

Keyword(s):

Test Bench ◽

Flow Characteristics ◽

Mineral Oil ◽

Operating Conditions ◽

Hydraulic Fluid ◽

Test Results ◽

Hydraulic Pump ◽

Cyclic Pressure ◽

Hydraulic Fluids ◽

Evaluation Parameters

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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Evaluation of new biodegradable fluid on the basis of accelerated durability test, FTIR and ICP spectroscopy

Research in Agricultural Engineering ◽

10.17221/6/2015-rae ◽

2017 ◽

Vol 63 (No. 1) ◽

pp. 1-9 ◽

Cited By ~ 2

Author(s):

Tulík Juraj ◽

Hujo Ľubomir ◽

Kosiba Jan ◽

Jablonický Juraj ◽

Jánošová Michela

Keyword(s):

Ftir Spectroscopy ◽

Chemical Properties ◽

Hydraulic Pump ◽

Spectroscopy Analysis ◽

Durability Test ◽

Operational Conditions ◽

Physico Chemical ◽

Hydraulic Fluids ◽

Accelerated Durability Test ◽

Agricultural Machines

The paper deals with the properties of newly developed synthetic biodegradable fluid in terms of its operational and physico-chemical properties. The evaluated fluid is a new biodegradable fluid MOL Farm UTTO Synt, which belongs to the group of universal gear-hydraulic fluids. At the beginning, the fluid was subjected to accelerated durability test under laboratory conditions, with monitoring its impact on technical conditions of the used hydraulic pump UD 25. After that, the FTIR spectroscopy analysis was performed, with monitoring thermal oxidation, oxidation by acid products, water content and additives depletion. Depletion of additives was also monitored by the ICP spectroscopy. Based on these results, it can be stated that the newly developed fluid has good operational and physico-chemical properties after the durability test and is suitable for further testing under operational conditions without a risk of damaging agricultural machines.

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