Influence of the Flow Section Geometry on the Static Characteristic Curves of Proportional Hydraulic Throttle Valves

Abstract

Various constructive versions of hydraulic units found in the structure of proportional hydraulic equipment are analysed in the paper. For each version, the authors establish the variation law of the flow section in function of the position of the adjusting element in relation to the reference position. The approach is useful when a theoretical analysis of a proportional equipment is needed, as well as when the characteristic diagrams of the equipment are theoretically established.

Proportional Hydraulic Flow Control Valves with Simple and Differential Command

“…Regarding the proposed solution, the mechanical adding machine Σ consists of the bushing 3 and the spool 2. This is one of the simplest mechanical adding machines [7]. The two input signals x…”