Determination of Ability of Hydrotronic Systems to Start in Low Ambient Temperatures

Abstract:

During start-up of hydrotronic system (hydraulic system with electric control) in low ambient temperatures a faulty operation may occur. The principles and conditions of safe operation of hydraulically (hydrotronically) driven machines and devices is essential for their designers and operators. For these reasons the author did a series of tests of hydraulic (hydrotronic) components and systems under thermal shock conditions (cooled-down components were supplied with hot working medium). In such conditions starting parameters of the selected hydrotronic components and systems, which secured safety of their operation, were determined. During start-up of a hydrotronic system under thermal shock conditions elements of hydraulic components warm up in a non-uniform way, due to varying material and shape properties. This causes change of clearances between the cooperating elements and may lead to faulty performance of hydraulic components and result in machine break-down. Heat transfer coefficients between oil and swilled element were determined and used for a calculation method developed by the author. The method enables to predict correct or incorrect operation of hydrotronic system.

• Periodical: Solid State Phenomena (Volume 164)
• Pages: 31-36
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.164.31
• Online since: June 2010
• Authors: Ryszard Jasiński
• Keywords: Diagnostics, Hydrotronic Component, Hydrotronic System, Starting the Hydrotronic System in Low Ambient Temperature

References

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[2] R. Jasiński: Assessment of suitability of hydraulic control components operated in low ambient temperatures, conference papers, Diagnostics, Olsztyn (2008) (in Polish).

[3] R. Jasiński: Methods of determination of correct operation area for hydraulic component in low ambient temperatures, Developments in Mechanical Engineering, vol. 2, Gdańsk (2008).

[4] R. Jasiński: Problems of the starting and operating of hydraulic components and systems in low ambient temperature (Part I), Polish Maritime Research, 4 (2008).

DOI: 10.2478/v10012-008-0052-2

[5] R. Jasiński: Problems of the starting and operating of hydraulic components and systems in low ambient temperature (Part II), Polish Maritime Research, 1 (2009).

DOI: 10.2478/v10012-008-0052-2

[6] Ł. Rutkiewicz: Experimental research of proportional valve in low ambient temperatures, Graduation paper, Thesis supervisor: R. Jasiński, Gdańsk University of Technology (2006) (in Polish).

[7] Books and catalogues from Bosch Rexroth company.

[8] Catalogues from Sauer-Danfoss company.