Tortuous path fluid pressure reduction device

• US 6,095,196 A
• Filed: 05/18/1999
• Issued: 08/01/2000
• Est. Priority Date: 05/18/1999
• Status: Active Grant

• Current Assignee: Fisher Controls International LLC (Emerson Electric Company)
• Original Assignee: Fisher Controls International LLC (Emerson Electric Company)
• Inventors: Schafbuch, Paul Jay, McCarty, Michael Wildie, Gethmann, Douglas Paul, Long, Ted Alan
• Primary Examiner(s): BRINSON, PATRICK F
• Application Number:
  US09/313,728
• Time in Patent Office: 441 Days
• Field of Search: 138/42, 138/43, 138/40, 137/625.3, 137/625.32, 251/127
• US Class Current: 138/42
• CPC Class Codes: F15D 1/02 in pipes or conduits
• 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
• CPC Class Codes: Y10T 137/86734 With metering feature

Abstract

A fluid pressure reduction device with tortuous flow paths in stacked disks. The fluid flow outlets are maintained independent by directed flow paths to avoid flow collisions in the exiting flow streams. A flow straightening section includes an inwardly tapered end section at the fluid flow outlets. Splitting of a tortuous flow path into at least two sub-flow paths with balancing of the mass flow between the sub-flow paths.

Claims

1. A fluid pressure reduction device comprising:

a plurality of stacked disks having a perimeter and hollow centers aligned along a longitudinal axis;

each disk having a plurality of respective fluid flow passages extending from a passage inlet at the disk hollow center to a passage outlet for the outlet flow at the disk perimeter;

each respective fluid flow passage including a tortuous flow path with each tortuous flow path remaining independent from each other in traversing through said disk to substantially avoid collisions between respective tortuous flow paths;

said fluid flow passages including directed flow path means at said passage outlets directing the outlet flows to substantially avoid collisions between respective outlet flows on exiting from the respective passage outlets.

2. A fluid pressure reduction device according to claim 1, said directed flow path means including independent flow path means enabling the respective fluid flow exiting from each passage outlet to remain substantially independent of each other following exiting from the respective passage outlets.

3. A fluid pressure reduction device according to claim 2, wherein each of the passage outlets at the disk perimeter is spaced a substantially equal distance from each other.

4. A fluid pressure reduction device according to claim 3, wherein each of the passage outlets at the disk perimeter is spaced a substantially equal distance from respective passage outlets on adjacent disks in the stack.

6. A fluid pressure reduction device according to claim 2, wherein said independent flow path means includes spacially separated respective passage outlets to enable the respective outlet flows to remain substantially independent of each other following exiting from the respective passage outlets.

7. A fluid pressure reduction device according to claim 1, wherein said directed flow path means at said passage outlets directs the outlet flows in the same direction around said disk perimeter.

5. A fluid pressure reduction device comprising:

a plurality of stacked disks having a perimeter and hollow centers aligned along a longitudinal axis;

each disk having a plurality of respective fluid flow passages extending from a passage inlet at the disk hollow center to a passage outlet for the outlet flow at the disk perimeter;

each respective fluid flow passage including a tortuous flow path;

said fluid flow passages including directed flow path means at said passage outlets directing the outlet flows to substantially avoid collisions between respective outlet flows on exiting from the respective passage outlets;

said directed flow path means including independent flow path means enabling the respective fluid flow exiting from each passage outlet to remain substantially independent of each other following exiting from the respective passage outlets; and

wherein said independent flow path means includes an inwardly tapered section at the end of each respective passage outlet for straightening the respective outlet flows on exiting from the respective passage outlets.

8. A fluid pressure reduction device comprising:

a plurality of stacked disks having a perimeter and hollow centers aligned along a longitudinal axis;

each disk having a plurality of respective fluid flow passages extending from a passage inlet at the disk hollow center to a passage outlet for the outlet flow at the disk perimeter;

each respective fluid flow passage including a tortuous flow path;

said fluid flow passages including directed flow path means at said passage outlets directing the outlet flows to substantially avoid collisions between respective outlet flows on exiting from the respective passage outlets; and

wherein said directed flow path means at said passage outlets directs the respective outlet flows (a) in one direction around one-half of the disk perimeter, and (b) in a second opposite direction around the other half of the disk perimeter.

9. A fluid pressure reduction device according to claim 8, including at selected passage outlets, said directed flow path means including in dependent flow path means enabling the respective fluid flow exiting from said selected passage outlets to remain substantially independent of each other following exiting from the selected passage outlets.

10. A fluid pressure reduction device comprising:

a plurality of stacked disks having a perimeter and hollow centers aligned along a longitudinal axis;

each disk having a plurality of respective fluid flow passages extending from a passage inlet at the disk hollow center to a passage outlet at the disk perimeter;

each respective fluid flow passage including a tortuous flow path defined by at least two abrupt changes in flow direction and a splitting sub-flow section providing at least one splitting of the fluid flow into two sub-flow paths ending at respective sub-flow outlets at the disk perimeter; and

balanced mass flow means enabling the sub-flow paths to have the same mass flow of fluid so as to balance the mass flow of fluid in each sub-flow path to the respective sub-flow outlet.

11. A fluid pressure reduction device according to claim 10, wherein said balanced mass flow means includes restriction means in one of the sub-flow paths for changing the flow area of the respective sub-flow path to equilibrate the mass flow.

12. A fluid pressure reduction device according to claim 10, wherein said balanced mass flow means includes a flow straightening section in said passageway immediately adjacent and before the splitting sub-flow section.

13. A fluid pressure reduction device according to claim 12, wherein said flow straightening section includes an inwardly tapered end section.

14. A fluid pressure reduction device according to claim 10, including a flow thrust reverser in the splitting sub-flow section immediately adjacent the inwardly tapered end section.

15. A fluid pressure reduction device according to claim 10, including independent flow path means enabling the respective fluid flow exiting from each sub-flow path to remain substantially independent of each other following exiting from the respective sub-flow outlets.

16. A fluid pressure reduction device comprising:

a plurality of stacked disks having a perimeter and hollow centers aligned along a longitudinal axis;

a plurality of respective fluid flow passages defining tortuous flow paths through said stacked disks, each extending from a passage inlet at the stacked disk hollow center to a passage outlet for the outlet flow at the stacked disk perimeter;

each tortuous flow path in each disk remaining independent from each other in traversing through said disk to substantially avoid collisions between respective tortuous flow paths in each disk; and

said fluid flow passages including directed flow path means at said passage outlets directing the outlet flows to substantially avoid collisions between respective outlet flows on exiting from the respective passage outlets at the perimeter of said stacked disks.