ИССЛЕДОВАНИЕ ВЛИЯНИЯ ДАВЛЕНИЯ В СИСТЕМЕ УПРАВЛЕНИЯ НА РАБОТОСПОСОБНОСТЬ И ДОЛГОВЕЧНОСТЬ ОБЪЕМНОГО ГИДРОПРИВОДА SAUER DANFOSS СЕРИИ 90

Abstract

During operation, there are occur failures of the Sauer-Danfoss 90 series hydraulic drive, resulting in downtime of equipment and losses to operating companies. It is not always possible to determine the true cause of the loss of performance of an imported hydraulic drive due to its low level of knowledge and complexity of the design. (Research purpose) The research purpose is in studying the influence of pressure in the control system on the performance and durability parameters of the Sauer Danfoss 90 series volumetric hydraulic drive. (Materials and methods) An analysis of the design and works devoted to the study of the failures of volumetric hydraulic drives allows proposing a new scheme for loss of performance and outlining ways to improve the durability of the Sauer Danfoss 90 series. (Results and discussion) The pressure values in the control system were calculated for the pumping unit of the 90R100, at which the pumping unit moves from the minimum to the maximum position, which was confirmed experimentally using bench equipment. The difference between the calculated and experimental values is 0.04-0.07 megapascals. The increase in productivity in the control system leads to an increase in the performance parameters and to an increase in the pre-repair life of the Sauer Danfoss 90 series hydraulic drive. (Conclusions) To improve pre-repair life of a Sauer Danfoss hydraulic drive it is required the use of more powerful feed pump, as at the same values of the clearances in the joints, he is able to compensate for leakage of working fluid longer, while maintaining the performance above the limits.