SWEPT OUTLET NOISE REDUCING ELEMENT

• US 20150152976A1
• Filed: 12/03/2013
• Published: 06/04/2015
• Est. Priority Date: 12/03/2013
• Status: Active Grant

• Current Assignee: Fisher Controls International LLC (Emerson Electric Company)
• Original Assignee: Fisher Controls International LLC (Emerson Electric Company)
• Inventors: Fagerlund, Allen C., Eilers, Daniel J.
• Granted Patent: US 9,291,282 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F16K 3/24 with cylindrical valve members
• CPC Class Codes: F16K 47/08 for decreasing pressure or noise level and having a throttling member separate from the closure member , e.g. screens, slots, labyrinths

Abstract

A stackable noise attenuating disk includes an inner perimeter edge and an outer perimeter edge. A plurality of inlet passages is disposed along the inner perimeter edge and a plurality of outlet passages disposed along the outer perimeter edge. The plurality of outlet passages includes first outlet passages having a first width and second outlet passages having a second width, which is greater than the first width. Each of the plurality of outlet passages defines a longitudinal axis that is offset by a predetermined angle from a radial axis extending through a corresponding outlet passage. The plurality of inlet passages and the plurality of outlet passages are arranged such that fluid entering one of the plurality of inlet passages exits through at least one of the plurality of outlet passages.

Claims

1. A stackable noise attenuating disk, comprising:

an inner perimeter edge;

an outer perimeter edge;

a plurality of inlet passages disposed along the inner perimeter edge; and

a plurality of outlet passages disposed along the outer perimeter edge, the plurality of outlet passages including a plurality of first outlet passages having a first width and a plurality of second outlet passages having a second width, greater than the first width, each of the plurality of outlet passages defining a longitudinal axis that is offset by a predetermined angle from a radial axis extending through a corresponding outlet passage;

wherein

the plurality of inlet passages and the plurality of outlet passages are arranged such that fluid entering one of the plurality of inlet passages exits through at least one of the plurality of outlet passages.

2. The stackable noise attenuating disk of claim 1, wherein the predetermined angle is preferably 15 degrees.

3. The stackable noise attenuating disk of claim 1, wherein the plurality of outlet passages include a plurality of third outlet passages having a third width, greater than the second width.

4. The stackable noise attenuating disk of claim 3, wherein the disk includes one or more outlet groups, each of the one or more outlet groups comprising at least one first outlet passage, at least one second outlet passage, and at least one third outlet passage.

5. The stackable noise attenuating disk of claim 1, wherein:

each of the plurality of first outlet passages and the plurality of second outlet passages are defined by a first lateral edge, a second lateral edge, and a circumferential inner edge; and

the first lateral edge and the second lateral edge of each of the plurality of first outlet passages and the plurality of second outlet passages have the same length.

6. The stackable noise attenuating disk of claim 5, wherein the first lateral edge and the second lateral edge of each of the plurality of first outlet passages and the plurality of second outlet passages are parallel to the corresponding longitudinal axis.

7. The stackable noise attenuating disk of claim 5, wherein:

the first lateral edge and the second lateral edge of each of the plurality of first outlet passages is separated by a first angular dimension and the first angular dimension is the first width; and

the first lateral edge and the second lateral edge of each of the plurality of second outlet passages is separated by a second angular dimension and the second angular dimension is the second width.

8. The stackable noise attenuating disk of claim 1, wherein the plurality of first outlet passages and the plurality of second outlet passages cooperate to shift the noise peak frequencies of fluid exiting the plurality of outlet passages, thereby reducing the overall noise level of fluid exiting the plurality of outlet passages.

9. The stackable noise attenuating disk of claim 1, further comprising:

a first plenum section positioned adjacent the inner perimeter edge and outwardly offset in a radial direction from the inner perimeter edge such that the first plenum section is in fluid communication with at least one inlet passage of one or more adjacent disks;

a second plenum section outwardly offset in a radial direction from the inner perimeter edge such that the second plenum section is in fluid communication with at least one first plenum section of the one or more adjacent disks;

an aperture outwardly offset in a radial direction from the first plenum section such that the aperture is in fluid communication with at least one second plenum section of the one or more adjacent disks; and

a third plenum section offset in a radial direction from the aperture and the outlet passages such that the third plenum section is in fluid communication with an aperture and an outlet passage of the one or more adjacent disks.

10. The stackable noise attenuating disk of claim 9, wherein fluid entering at least one of the plurality of inlet passages flows through a first plenum section of one or more adjacent disks, through the second plenum section, through an aperture of the one of more adjacent disks, and through the third plenum section, to exit through one or more outlet passage of the one more adjacent disks.

11. The stackable noise attenuating disk of claim 9, wherein fluid entering an inlet passage of one or more adjacent disks flows through the first plenum section, through a second plenum section of the one or more adjacent disks, through the aperture, and through a third plenum section of the one or more adjacent disks, to exit through at least one of the plurality of outlet passages.

12. The stackable noise attenuating disk of claim 9, further comprising at least one second inlet passage extending from an outer edge of the first plenum section to provide the fluid communication between the first plenum section and the at least one second plenum section of the one or more adjacent disks.

13. A vent diffuser, comprising:

an elongated hollow pipe having a flange at one end of the pipe;

an impermeable end plate coupled to the flange; and

a plurality of stacked disks disposed between the flange and the end plate, each of the plurality of stacked disks comprising;

an inner perimeter edge;

an outer perimeter edge;

a plurality of inlet passages disposed along the inner perimeter edge; and

a plurality of outlet passages disposed along the outer perimeter edge, the plurality of outlet passages including a plurality of first outlet passages having a first width and a plurality of second outlet passages having a second width, greater than the first width, each of the plurality of outlet passages defining a longitudinal axis that is offset by a predetermined angle from a radial axis extending through a corresponding outlet passage;

wherein

the plurality of inlet passages and the plurality of outlet passages are arranged such that fluid entering one of the plurality of inlet passages exits through at least one of the plurality of outlet passages.

14. The vent diffuser of claim 13, wherein the plurality of outlet passages include a plurality of third outlet passages having a third width, greater than the second width.

15. The vent diffuser of claim 13, wherein:

each of the plurality of first outlet passages and the plurality of second outlet passages are defined by a first lateral edge, a second lateral edge, and a circumferential inner edge; and

the first lateral edge and the second lateral edge of each of the plurality of first outlet passages and the plurality of second outlet passages have the same length.

16. The vent diffuser of claim 13, wherein each of the plurality of stacked disks further comprises:

a first plenum section positioned adjacent the inner perimeter edge and outwardly offset in a radial direction from the inner perimeter edge such that the first plenum section is in fluid communication with at least one inlet passage of one or more adjacent disks;

a second plenum section outwardly offset in a radial direction from the inner perimeter edge such that the second plenum section with at least one first plenum section of the one or more adjacent disks;

an aperture outwardly offset in a radial direction from the first plenum section such that the aperture is in fluid communication with at least one second plenum section of the one or more adjacent disks; and

a third plenum section offset in a radial direction from the aperture and the outlet passages such that the third plenum section is in fluid communication with an aperture and an outlet passage of the one or more adjacent disks.

17. The vent diffuser of claim 13, wherein:

the plurality of stacked disks comprises a first disk, a second disk, a third disk, and a fourth disk;

the second disk is positioned adjacent the first disk and is oriented such that the second disk is rotated 180 degrees about a vertical axis relative to the first disk;

the third disk is positioned adjacent the second disk and is oriented such that the third disk is rotated 180 degrees about a first horizontal axis relative to the first disk; and

the fourth disk is positioned adjacent the third disk and is oriented such that the fourth disk is rotated 180 degrees about a second horizontal axis, perpendicular to the first horizontal axis, relative to the first disk.

18. A control valve, comprising:

a housing having an inlet and an outlet;

a valve seat disposed within the housing between the inlet and the outlet;

a valve plug vertically displaceable from a first position in which the valve plug sealingly engages the valve seat to a second position in which the valve plug is remotely disposed from the valve seat; and

a valve cage disposed within the housing adjacent to the valve seat such that the valve cage surrounds the valve plug, the valve cage comprising a plurality of stacked disks, each of the plurality of stacked disks comprising;

an inner perimeter edge;

an outer perimeter edge;

a plurality of inlet passages disposed along the inner perimeter edge; and

a plurality of outlet passages disposed along the outer perimeter edge, the plurality of outlet passages including a plurality of first outlet passages having a first width and a plurality of second outlet passages having a second width, greater than the first width, each of the plurality of outlet passages defining a longitudinal axis that is offset by a predetermined angle from a radial axis extending through a corresponding outlet passage;

wherein

the plurality of inlet passages and the plurality of outlet passages are arranged such that fluid entering one of the plurality of inlet passages exits through at least one of the plurality of outlet passages.

19. The vent diffuser of claim 18, wherein:

the plurality of outlet passages includes a plurality of third outlet passages having a third width, greater than the second width;

each of the plurality of first outlet passages, the plurality of second outlet passages, and the plurality of third outlet passages are defined by a first lateral edge, a second lateral edge, and a circumferential inner edge; and

the first lateral edge and the second lateral edge of each of the plurality of first outlet passages, the plurality of second outlet passages, and the plurality of third outlet passages have the same length.

20. The control valve of claim 18, wherein:

the plurality of stacked disks comprises a first disk, a second disk, a third disk, and a fourth disk;

the second disk is positioned adjacent the first disk and is oriented such that the second disk is rotated 180 degrees about a vertical axis relative to the first disk;

the third disk is positioned adjacent the second disk and is oriented such that the third disk is rotated 180 degrees about a first horizontal axis relative to the first disk; and

the fourth disk is positioned adjacent the third disk and is oriented such that the fourth disk is rotated 180 degrees about a second horizontal axis, perpendicular to the first horizontal axis, relative to the first disk.