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...

AI Technical Summary

Problems solved by technology

[0006] The oil supply pressure of the system may fluctuate, or the system consists of multiple actuators of the same type working in parallel. The inconsistent oil supply pressure caused by individual or pipeline differences will lead to large differences in flow output under the same control signal, and the system , the failure of the voltage stabilizing component, the system must not be cut off

Images