THROTTLE-CONTROL VALVE Russian patent published in 2011 - IPC F16K1/34 F01D17/14 

FIELD: machine building.

SUBSTANCE: throttle-control valve consists of case, of hollow slide with perforations and of diffuser seat. Perforation holes create an internal cavity of the slide with external streamlined surface. Perforation holes are arranged only on a section of streamlined surface below seating diametre D₁ not less, than on three diametres (D₁>D₂>D₃)<D_n. Diametres of perforation holes on this diametres d₁,d₂,d₃ are decreased downstream.

EFFECT: reduced negative effects of secondary flows, facilitation of stable flow and smooth flow rate characteristic of valve at all positions of slide.

5 dwg