IMPROVEMENT OF TEST METHODS AND TECHNICAL DIAGNOSTICS OF HYDRAULIC DAMPERS ON THE TEST STAND ИГK-90.1
Abstract
The article examines ways to improve the test method and technical diagnostics of hydraulic dampers of traction rolling stock on the test stand of ИГK-90.1 which are operated in the production divisions of PJSC «Ukrainian Railways». A brief review of modern test benches is given and the type of the test stand ИГK-90.1 is selected for its further modernization. The calculations of the energy capacity of hydraulic dampers, which formed the basis for software and modernization of the design of the test stand ИГK-90.1, are given. At the indicated type of test stand, the authors carried out experimental studies of the hydrodynamic type НЦ1100, graphical dependences were obtained for the force and resistance parameter, as well as the energy capacity from the piston displacement speed. In addition, a graph of the temperature change along the outer vertical surface of the cylinder body during the test is obtained. On a concrete example test of hydraulic damper of type НЦ1100, the expediency of introducing a new defining technical parameter (energy-capacity) for the evaluation of the operability and functionality of hydraulic diodes for their main purpose has been proved. The authors obtained an analytical expression for the transformation balance of the energy loading of the hydraulic damper to the work on the piston movement and the thermal energy of heating the working fluid in the cylinder. On the basis of this, the software of the ИГK-90.1 computer bench has been improved, which made it possible to obtain graphical dependencies of the hydro damper’s energy intensity on the piston moving speed. In the long run, it is planned to further upgrade the software to the PC booth to conduct resource tests of hydraulic damps to form a database, which will be the basis for the thermal diagnosis of the technical state of the hydraulic damp.
The prospect of applying a new technical parameter in practice and using the obtained research results in the development and implementation of an automated remote thermal control system for hydraulic diodes during their operation on railway transport is indicated.
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