Proportion flow control valve

Abstract

The scheme relates to a proportion flow control valve, which includes a control valve body, as well as a proportion regulating valve component and an overflow valve component arranged parallel at theoutlet end of an oil inlet oil line, and a return check valve component connected with the proportion regulating valve component through an oil circuit, wherein the proportion regulating valve component includes a proportion electromagnet and a valve sleeve component; the proportion regulating valve component, the overflow valve component and the return check valve component are all mounted insidethe control valve body; the valve sleeve component includes a first valve sleeve, a first valve element, a first spring base and a first spring, wherein a first axial through hole is formed in the first valve sleeve; the first valve element is mounted inside the first axial through hole in a sliding manner; the first spring base is fixed in the first axial through hole; a first fuel oil via holeis formed in the first spring base in the axial direction; the first spring is limited between the first valve element and the first spring base; a plurality of control windows are uniformly distributed on the first valve sleeve in the radial direction, and are formed through sequentially connecting a plurality of windows with different opening areas.

Description

technical field

[0001] The invention relates to the field of hydraulic technology, in particular to a proportional flow control valve. Background technique

[0002] For the existing flow regulating valve parts, there are relatively large deficiencies in the aspects of control curve, parameter consistency, flow breaking capacity and stability. There are the following factors:

[0003] The opening is a single shape, such as a triangular opening, which has better control accuracy for low flow conditions, but the entire control curve is a curve with a large rise rate, resulting in a decrease in control accuracy when the flow is large. The overall control of the rectangular opening is linear, but the control accuracy is low under low oil supply conditions.

[0004] The accumulative errors of components, system errors and other factors cause large flow differences at the maximum opening and deviations in performance parameters.

[0005] Due to the limitations of machining accur...

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