Vibration resistance of HST 90 hydrostatic transmission

Abstract

Hydrostatic transmissions, which are usually used in the drives of mobile machines, have recently been actively used in drives of other working bodies of machines. For example, in drives of mixers of concrete carriers, drives of working bodies of agricultural machines - straw cutters, etc. This area of use of hydrostatic transmissions is actively developing. The successful solution of this problem is prevented by the occurrence of vibrational operating modes while reducing inertial and technological loads, and in some cases leads to significant disturbances in the operation of machines. Using computer simulation of the hydrostatic transmission, the influence of the inertial and technological loads, as well as the parameters of the hydraulic system, the conditions for the occurrence of vibrational modes of its operation are analyzed. Based on the results obtained, measures have been developed to improve the design of measures and shunt valves, which allow to exclude vibrational modes of operation with a significant expansion of the range of variation of inertial and technological loads. The results of a bench simulation of hydrostatic transmissions with advanced valves, conducted in the laboratories of PJSC Gidrosila APM (Kropyvnytskyi), confirmed the effectiveness of the proposed measures. The enterprise has begun mass production of hydrostatic transmissions of an improved design.