Analysis of non-spool throttle flow dividers for synchronous hydromechanical drives

Abstract

Relevance and goals. Hydraulic drives of modern mobile machines and technological equipment are, as a rule, branched and multi-circuit. At the same time, there is often a need to ensure synchronous (coordinated) movement of two or more independent hydraulic motors. The analysis of the conducted studies has shown that throttle flow dividers are the most suitable for providing automatic control of hydraulic drives. The use of spool flow dividers in general-purpose hydraulic drives, especially if they work in harsh conditions with high dustiness of the environment is impractical. Materials and methods. The article provides an overview of existing designs of non-spool throttle flow dividers for synchronous hydromechanical drives, their design schemes and operating principle are given. A comparative analysis of the functions performed by them and the quality of work is carried out. Suggestions are given on the principles of selecting a particular design of the flow divider, depending on the operating conditions. Results. A scheme of a test bench for piston hydraulic cylinders with energy recovery is proposed. A mathematical model of the stand has been developed and an example of a preliminary calculation of its functioning is given. Conclusions. The conclusion is made about the design features that make it possible to ensure the synchronous operation of hydraulic drives with high accuracy at minimal cost.