Bypass throttling electric-hydraulic proportional servo valve

Abstract

The invention relates to a bypass throttling electric-hydraulic proportional servo valve. The bypass throttling electric-hydraulic proportional servo valve comprises a valve sleeve and a valve element, wherein the valve element is movably arranged in the valve sleeve; an oil inlet annular groove, a primary oil inlet annular groove and an oil outlet annular groove are formed in a spaced manner in the outer wall of the valve sleeve; a plurality of oil inlet through holes are formed in the valve sleeve wall in the oil inlet annular groove; a plurality of primary oil inlet through holes are formedin the valve sleeve wall in the primary oil outlet annular groove; a plurality of oil outlet control grooves are formed in the valve sleeve wall in the oil outlet annular groove; the oil outlet control grooves are of trapezoidal structures; two bosses are formed on the outer wall of the valve element; and an adjusting annular groove is formed between the two bosses. The bypass throttling electric-hydraulic proportional servo valve has the advantages of being reasonable in structural design, simple to process and low in cost, capable of working at a high pressure and high in resolution, beingunlikely to be clamped hydraulically and the like.

Description

Technical field: [0001] The invention relates to the technical field of proportional servo valves, in particular to an electro-hydraulic proportional servo valve utilizing bypass throttling. Background technique: [0002] Proportional servo valves can continuously control the pressure, flow and direction of oil in proportion to the input electrical signal, and are widely used in hydraulic systems. The existing proportional servo valve controlled by bypass throttling has a structural feature of opening triangular and / or semicircular grooves on the valve core for control. In the field of high-resolution and high-pressure control, the existing proportional servo valves (usually have better control performance below 25MPa, and the control stroke can be about 5mm) cannot meet the requirements of high-resolution and high pressure. Invention content: [0003] The purpose of the present invention is to make up for the deficiencies of the prior art, and to provide an electro-hydra...

AI Technical Summary

Problems solved by technology

The existing proportional servo valve controlled by bypass throttling has a structural feature of opening triangular and / or semicircular grooves on the valve core for control. In the field of high-resolution and high-pressure control, the existing proportional servo valves (usually have better control performance below 25MPa, and the control stroke can be about 5mm) cannot meet the requirements of high-resolution and high pressure

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