Squirrel-cage flow regulating valve with regulating window

Abstract

The invention discloses a squirrel-cage flow regulating valve with a regulating window. The squirrel-cage flow regulating valve comprises an outer shell, a power assembly, a valve rod, a valve elementand a valve seat, wherein the outer shell is provided with a hollow valve cavity; the outer shell is provided with a valve rod opening used for installing the valve rod, an inlet used for allowing fluid to flow in and an outlet used for allowing the fluid to flow out; the power assembly is used for driving the valve rod to move in the axial direction; the valve element is installed at the other end of the valve rod and provided with a through hole used for communicating a rod cavity with a rodless cavity; the valve seat is packaged in the valve cavity and positioned through the outer shell; the valve seat is provided with the regulating window; the power assembly drives the valve element to move up and down along the valve seat through the valve rod; and the opening degree of the window of the valve seat is determined by displacement of the valve element. According to the squirrel-cage flow regulating valve, the through hole is formed to balance the force, acting on the valve element,of the fluid, the medium flowing oscillation situation can be weakened, and therefore the working stability is better; and the power assembly is used for driving the valve element to move linearly, and the precision is high. The squirrel-cage flow regulating valve can be applied to a liquid oxygen methane variable thrust engine, and the requirement for the flow regulating precision is met.

Description

technical field [0001] The application belongs to the technical field of valves, and in particular relates to a squirrel-cage flow regulating valve with an regulating window. Background technique [0002] Flow regulating valves are widely used in the petrochemical industry and aerospace fields. Traditional flow regulating valves mainly include straight-through single-seat regulating valves, straight-through double-seat regulating valves, and squirrel-cage regulating valves (also known as sleeve regulating valves or cage-type regulating valves). Regulating valve, the sleeve replaces the valve seat of single and double seat valve), plug-type regulating valve, angle-type regulating valve, etc. [0003] In reusable liquid rocket engines, the regulation of engine thrust is the key to implementation. The flow regulation of the propellant by the regulating valve is a key component for the realization of thrust regulation. However, the control valve with the opening shape of the t...

AI Technical Summary

Problems solved by technology

However, the control valve with the opening shape of the traditional valve seat has poor linearity of flow characteristics, and sudden changes in thrust adjustment will occur, which limits the application of traditional flow control valves in thrust-variable liquid rocket engines.

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