US 12,253,202 B2
Fluid silencer
Jong Jin Park, Sejong-si (KR); Jun Hyuk Kwak, Sejong-si (KR); Hak Joo Lee, Daejeon (KR); Tae In Choi, Daejeon (KR); and Min Seok Jung, Daejeon (KR)
Assigned to CENTER FOR ADVANCED META-MATERIALS, Daejeon (KR)
Appl. No. 17/621,222
Filed by CENTER FOR ADVANCED META-MATERIALS, Daejeon (KR)
PCT Filed Jun. 9, 2020, PCT No. PCT/KR2020/007450
§ 371(c)(1), (2) Date Dec. 20, 2021,
PCT Pub. No. WO2021/020719, PCT Pub. Date Feb. 4, 2021.
Claims priority of application No. 10-2019-0092892 (KR), filed on Jul. 31, 2019.
Prior Publication US 2022/0349509 A1, Nov. 3, 2022
Int. Cl. F16L 55/033 (2006.01)
CPC F16L 55/0332 (2013.01) 5 Claims
OG exemplary drawing
 
1. A fluid silencer comprising:
an expansion pipe disposed on a pipe through which a fluid containing noise sources flows and having an accommodation space therein;
a viscous fluid received in the accommodation space;
a noise introducing member disposed between the pipe and the expansion pipe to seal the accommodation space and allowing the noise sources to be introduced into the accommodation space therethrough;
at least one partition member disposed in the accommodation space and dividing the accommodation space in a flow direction of the fluid;
multiple baffle members disposed on one surface of the partition member and forming multiple sound absorbing spaces into which the noise sources introduced into the accommodation space are dispersedly introduced;
an elastic member disposed between the partition member and the baffle members and contracted/expanded by the viscous fluid entering/leaving the sound absorbing spaces as the noise sources are introduced into the sound absorbing spaces,
whereby the noise sources are converted and dissipated into thermal energy due to friction between the viscous fluid and the baffle member; and
a sleeve member having a cylindrical shape and being disposed between the noise introducing member and the baffle members and preventing the noise sources having passed through the noise introducing member from being directly introduced into the sound absorbing spaces,
wherein each baffle is located in a radial direction on an outer surface of the sleeve member having the cylindrical shape,
wherein each baffle member extends radially outward from the outer surface of the sleeve member as a single continuous structure, with each baffle member having a friction surface on both sides of the radially extending structure, the friction surface being corrugated to have alternating ridges and grooves to increase a contact area with the viscous fluid, wherein the friction surface is corrugated in a travel direction of the noise sources entering/leaving the sound absorbing spaces.