High energy loss device

• US 4,105,048 A
• Filed: 02/03/1977
• Issued: 08/08/1978
• Est. Priority Date: 09/09/1975
• Status: Expired due to Term

• Current Assignee: Control Components Incorporated (IMI PLC)
• Original Assignee: Control Components Incorporated (IMI PLC)
• Inventors: Self, Richard E.
• Primary Examiner(s): Aegerter, Richard E.
• Assistant Examiner(s): Bryant, III, James E.
• Application Number:
  US05/765,171
• Time in Patent Office: 551 Days
• Field of Search: 138/42, 138/43, 138/40, 137/625.28, 137/625.3, 137/625.37, 181/33 HB, 165/81
• US Class Current: 138/42
• 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: F16L 55/02 Energy absorbers; Noise absorbers in valves F16K47/00
• CPC Class Codes: F16L 55/02781 The regulating element being provided with radial outputs
• CPC Class Codes: Y10T 137/86718 Dividing into parallel flow paths with recombining
• CPC Class Codes: Y10T 137/86734 With metering feature
• CPC Class Codes: Y10T 137/86791 Piston

Abstract

A more compact high energy loss device is provided having a series of uniquely formed multiturn labyrinth assemblies which reduce the pressure of a fluid flowing therethrough. The inlet of the labyrinth assemblies is formed according to a substantially circular configuration to have a predetermined inlet area while the outlet is formed according to a substantially scalloped configuration to provide an outlet area greater than the inlet area. The scalloped configuration of the outlet yields an outlet area which is also greater than if the outlet were of circular configuration. The scalloped outlet configuration also makes the labyrinth assembly less susceptible to circumferential thermal stresses resulting from high temperature fluids passing through the device producing high temperature inlet conditions and low temperature outlet conditions.

Claims

1. An exhaust valve for expelling a pressurized high temperature fluid to atmosphere comprising:

a series of elements having adjacent surfaces joined to form a rigid structure;

a multi-turn labyrinth formed between the adjacent surfaces of said elements to provide a pressure drop for fluid flowing therethrough;

a central aperture extending through said series of elements in a substantially perpendicular manner relative to the adjacent surfaces thereof and providing an inlet to said multi-turn labyrinth therealong;

outlet means formed along the external surface of said rigid structure to exhaust the fluid from said multi-turn labyrinth to the atmosphere; and

stress relief means formed along the external surface of said rigid structure to prevent splitting of said elements of said rigid structure due to a temperature difference between the high temperature fluid at the inlet and the low temperature fluid at the outlet, wherein said stress relief means includes a series of similarly spaced and cut radial cutouts formed in the adjoining surfaces of each of said elements and wherein each of said elements is oriented to have the radial cutouts of each element aligned to form a series of cutouts extending vertically through the entire rigid structure.

2. An exhaust valve as set forth in claim 1 including control means controllably extending into said central aperture to thereby control the amount of fluid exhausted to the atmosphere.