STACKED DISC NOISE ABATEMENT DEVICE AND CONTROL VALVE COMPRISING SAME Russian patent published in 2018 - IPC F16K47/08 

FIELD: acoustics.

SUBSTANCE: group of inventions relates to noise reduction devices intended for control valves for controlling fluid flow. Fluid pressure reduction device includes a plurality of stacked discs. First disc has a first hollow centre portion, a first annular perimeter, a first fluid inlet portion disposed radially inward of a first stage restriction, a first stage recovery entry disposed radially outward of the first stage restriction, and a third stage recovery plenum disposed radially outward of the first stage recovery entry. Second disc has a second hollow centre portion, a second annular perimeter and a restriction and recovery plenum disposed between the hollow centre portion and the second annular perimeter, and comprising a first stage recovery area, a second stage restriction fluidly connected to the first stage recovery area, and a second stage recovery plenum fluidly connected to the second stage restriction. Fluid flowpath is formed between the first fluid inlet portion and the third stage recovery plenum, the fluid flowpath passing through the first stage restriction, the first stage recovery area, the second stage restriction, and the second stage recovery plenum, before passing through the third stage recovery plenum, the second stage restriction directing the fluid flowpath radially inward, towards the second hollow center portion. Each restriction element comprises a reduction in the cross section of the flow region along the fluid flowpath. Fluid flow control valve includes a plurality of stacked discs defining the fluid flowpath through itself. Fluid flowpath comprises at least two pressure reduction stages. First pressure reduction stage is oriented so that the fluid flowpath is directed radially outward. Second pressure reduction stage is oriented so that the fluid flowpath is directed radially inward. Each pressure reduction stage includes a restriction element comprising a reduction in the cross section of the flow area along the fluid flowpath.

EFFECT: stacked disc noise abatement device and a control valve comprising said device are provided.

24 cl, 7 dwg