Disclosed is a device for reducing flow noise. In order to achieve a low flow noise, the device includes inlet apertures for receiving a fluid flow, chambers into which one or more inlet apertures open up, a cross-sectional area of a single chamber being larger than a combined flow cross-sectional a
Disclosed is a device for reducing flow noise. In order to achieve a low flow noise, the device includes inlet apertures for receiving a fluid flow, chambers into which one or more inlet apertures open up, a cross-sectional area of a single chamber being larger than a combined flow cross-sectional area of the inlet apertures opening up thereto, and chamber-specific outlet apertures for forwarding the fluid flow from the chamber, a flow cross-sectional area of each outlet aperture being smaller than the cross-sectional area of the chamber, and the combined flow cross-sectional area of all outlet apertures of the single chamber being larger than the combined flow cross-sectional area of the inlet apertures opening up into said chamber.
대표청구항▼
1. A device for reducing flow noise, the device comprising: an inlet surface provided with a plurality of inlet apertures for receiving a fluid flow;an outlet surface provided with a plurality of outlet apertures for forwarding the fluid from the device; anda plurality of chambers into which the plu
1. A device for reducing flow noise, the device comprising: an inlet surface provided with a plurality of inlet apertures for receiving a fluid flow;an outlet surface provided with a plurality of outlet apertures for forwarding the fluid from the device; anda plurality of chambers into which the plurality of inlet apertures of the inlet surface open up, at least one of the plurality of chambers is separated from adjacent chambers surrounding the at least one of the plurality of chambers by intermediate walls providing confining surfaces for the chambers, the inlet apertures being chamber-specific such that each single inlet aperture of the plurality of inlet apertures opens up into one chamber only and one or more inlet apertures of the plurality of inlet apertures open up into a single chamber, and a cross-sectional area of each chamber of the plurality of chambers being larger than a combined flow cross-sectional area of the one or more inlet apertures opening up thereto,wherein the plurality of outlet apertures are chamber-specific and are arranged in the outlet surface for forwarding the fluid flow from the plurality of chambers, a flow cross-sectional area of each outlet aperture being smaller than the cross-sectional area of a single chamber of the plurality of chambers, and a combined flow cross-sectional area of all outlet apertures of the single chamber in the outlet surface being larger than the combined flow cross-sectional area of the one or more inlet apertures in the inlet surface opening up into the chamber,the at least one of the plurality of chambers has only three, only six, or only seven outlet apertures, andthe at least one of the plurality of chambers is shaped to have confining surfaces provided by the intermediate walls of the chambers which surround the chamber-specific outlet apertures of the at least one of the plurality of chambers by following the shape of the edges of the only three, only six, or only seven outlet apertures. 2. A device as claimed in claim 1, wherein the device comprises a first part wherein the inlet apertures are formed, a second part which is arranged against the first part and wherein the chambers are formed, and a third part which is arranged against the second part and wherein the outlet apertures are formed. 3. A device as claimed in claim 1, wherein the outlet apertures of at least one of the plurality of chambers are arranged such that one outlet aperture is at least partly in the same line with the inlet aperture of the chamber, whereby at least a portion of the fluid flow to be received from the inlet aperture may advance directly via the one outlet aperture while the rest of the outlet apertures of the chamber are arranged to surround the one outlet aperture. 4. A device as claimed in claim 1, wherein the device comprises second chambers into which one or more outlet apertures open up, and from each of the second chambers a plurality of outlet apertures opens up in order to forward the fluid flow. 5. A device as claimed in claim 1, wherein all chamber-specific outlet apertures of the single chamber open up into a same second chamber, the second chamber being provided with chamber-specific outlet apertures in order to forward the fluid flow. 6. A device as claimed in claim 1, wherein the device is in a closure member of a valve, the closure member being movable from a position closing a flow channel of the valve to a position wherein a flow in the flow channel of the valve becomes possible via the device. 7. A device as claimed in claim 6, wherein the valve is a rotary valve whose closure member is movable by rotating. 8. A device as claimed in claim 1, wherein the device is arranged in a linear valve. 9. A device as claimed in claim 8, wherein the device is made into a cylinder which is formed by one or more parts and which surrounds a closure member of a linear valve. 10. A device as claimed in claim 1, wherein the device is arranged in a flow channel after a valve in the direction of the fluid flow. 11. A device as claimed in claim 10, wherein the valve comprises a closure member having a spherical surface, and that the device comprises a concave inlet surface situated in the immediate vicinity of the closure member. 12. A device as claimed in claim 1, wherein the device is arranged in a flow channel in the flow direction before a closure member of a valve, the closure member having a spherical surface, and that the device comprises a concave outlet surface situated in the immediate vicinity of the closure member. 13. A valve comprising: a flow channel;a closure member situated in the flow channel, the closure member being movable from a position closing the flow channel of the valve to a position wherein a flow through the flow channel of the valve becomes possible; anda device in the flow channel for reducing flow noise, the device comprising: an inlet surface provided with a plurality of inlet apertures for receiving a fluid flow;an outlet surface provided with a plurality of outlet apertures for forwarding the fluid from the device; anda plurality of chambers into which the plurality of inlet apertures of the inlet surface open up, at least one of the plurality of chambers is separated from adjacent chambers surrounding the at least one of the plurality of chambers by intermediate walls providing confining surfaces for the chambers, the inlet apertures being chamber-specific such that each single inlet aperture of the plurality of inlet apertures opens up into one chamber only and one or more inlet apertures of the plurality of inlet apertures open up into a single chamber, and a cross-sectional area of each chamber of the plurality of chambers being larger than a combined flow cross-sectional area of the one or more inlet apertures opening up thereto,wherein the plurality of outlet apertures are chamber-specific and are arranged in the outlet surface for forwarding the fluid flow from the plurality of chambers, a flow cross-sectional area of each outlet aperture being smaller than the cross-sectional area of a single chamber of the plurality of chambers, and a combined flow cross-sectional area of all outlet apertures of the single chamber in the outlet surface being larger than the combined flow cross-sectional area of the one or more inlet apertures in the inlet surface opening up into the chamber,the at least one of the plurality of chambers has only three, only six, or only seven outlet apertures, andthe at least one of the plurality of chambers is shaped to have confining surfaces provided by the intermediate walls of the chambers which surround the chamber-specific outlet apertures of the at least one of the plurality of chambers by following the shape of the edges of the only three, only six, or only seven outlet apertures. 14. A valve as claimed in claim 13, wherein the device is in the closure member of the valve. 15. A valve as claimed in claim 13, wherein the device is arranged in the flow channel in the flow direction before or after the closure member. 16. A device for reducing flow noise, the device comprising: an inlet surface provided with a plurality of inlet apertures for receiving a fluid flow;an outlet surface provided with a plurality of outlet apertures for forwarding the fluid from the device; anda plurality of chambers into which the plurality of inlet apertures of the inlet surface open up, the inlet apertures being chamber-specific such that each single inlet aperture of the plurality of inlet apertures opens up into one chamber only and one or more inlet apertures of the plurality of inlet apertures open up into a single chamber, and a cross-section al area of each chamber of the plurality of chambers being larger than a combined flow cross-sectional area of the one or more inlet apertures opening up thereto;wherein the plurality of outlet apertures are chamber-specific and are arranged in the outlet surface for forwarding the fluid flow from the plurality of chambers, a flow cross-sectional area of each outlet aperture being smaller than the cross-sectional area of a single chamber of the plurality of chambers, and a combined flow cross-sectional area of all outlet apertures of the single chamber in the outlet surface being larger than the combined flow cross-sectional area of the one or more inlet apertures in the inlet surface opening up into the chamber,at least one of the plurality of chambers has only seven outlet apertures such that a middle aperture is arranged to allow a flow received in the chamber to advance linearly from one or more inlet apertures to exit via the middle outlet aperture while the other outlet apertures are arranged to surround the middle aperture, andthe at least one of the plurality of chambers is shaped to follow the shape of the edges of the only seven outlet apertures.
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이 특허에 인용된 특허 (11)
Luthe ; Fred J. ; Hays ; Allen E., Control valve trim assembly.
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