TO THE PROBLEM PERTAINING TO AUTOMATION CONTROL IMPROVEMENT OF BUILDING AND ROAD MA-CHINES WITH HYDRAULIC DRIVE

Abstract

Competitiveness of modern building and road machinery is determined by a number of factors: ease of machine control, automation level of technological processes, construction machinery cost, operational expenditures, maintainability and productivity.

In order to improve automation level of technological processes for drives of multi-functional mobile machines such as universal single-bucket excavator and loader it is proposed to apply multi-circuit hydraulics with closed flows of working fluid on the basis of multi-positional valve.

Combination of a regulated reversible pump, elements of hydraulic automation with a new con-trol valve in a multistage hydraulic drive with closed flows makes it possible to control building and road machinery.