Compressor discharge pulsation dampener

• US 20060086563A1
• Filed: 10/21/2004
• Published: 04/27/2006
• Est. Priority Date: 10/21/2004
• Status: Abandoned Application

• Current Assignee: Ingersoll-Rand Company (Trane Technologies plc)
• Original Assignee: Ingersoll-Rand Company (Trane Technologies plc)
• Inventors: Lucas, Michael J.
• Application Number:
  US10/970,613
• Publication Number:
  US 20060086563A1
• Time in Patent Office: Days
• US Class Current: 181/230
• CPC Class Codes: F01N 1/02 by using resonance
• CPC Class Codes: F01N 1/089 using two or more expansion chambers in series F01N1/083, F01N1/084, F01N1/086 take precedence
• CPC Class Codes: F01N 2470/20 Dimensional characteristics of tubes, e.g. length, diameter
• CPC Class Codes: F01N 2490/04 the gases flowing longitudinally from inlet to outlet only in one direction
• CPC Class Codes: F04B 53/004 by mechanical resonators
• CPC Class Codes: F04C 29/061 Silencers using overlapping frequencies, e.g. Helmholtz resonators

Abstract

A pulsation dampener comprising a first resonator tube having a first tube inlet in communication with a compressor outlet. The first resonator tube has an outlet located within a first resonator chamber. The first resonator tube has a length l₁ that is equal to λ₁/4 wherein λ₁ is the acoustic component wavelength passing through the first resonator tube and the first chamber has a length l₂ that is within 20% of the length l₁.

Claims

1. A pulsation dampener comprising:

a first resonator tube having a first tube inlet in communication with a compressor outlet and a first tube outlet located within a first resonator chamber, wherein the first resonator tube has a length l₁ that is equal to λ

₁/4 wherein λ

₁ is the acoustic component wavelength passing through the first resonator tube and the first chamber has a length l₂ that is within 20% of the length l₁.

2. The pulsation dampener of claim 1 wherein the first resonator chamber has a center and the first tube outlet is spaced from the first resonator chamber center.

3. The pulsation dampener of claim 1 wherein the first resonator tube and the first resonator chamber are configured such that the frequency attenuated by the first resonator tube matches a quarter wavelength mode of the first resonator chamber.

4. The pulsation dampener of claim 1 further comprising a second resonator chamber adjacent to the first resonator chamber and a second resonator tube having a second tube inlet located in the first resonator chamber and a second tube outlet located within the second resonator chamber, wherein the second resonator tube has a length l₃ that is equal to λ

₂/4 wherein λ

₂ is the acoustic component wavelength passing through the second tube and the second chamber has a length l₄ that is within 20% of the length l₃.

5. The pulsation dampener of claim 4 wherein the first and second resonator chambers each have a center and the first tube outlet and the second tube inlet are spaced from the first resonator chamber center and the second tube outlet is spaced from the second resonator chamber center.

6. The pulsation dampener of claim 4 wherein the first resonator tube and the first resonator chamber are configured such that the frequency attenuated by the first resonator tube matches a quarter wavelength mode of the first resonator chamber and the second resonator tube and the second resonator chamber are configured such that the frequency attenuated by the second resonator tube matches a quarter wavelength mode of the second resonator chamber.

7. A truck mounted pulsation assembly comprising:

a body configured for mounting on a truck, the body defining a fluid inlet configured to receive compressed fluid from a compressor, at least a first resonator chamber, and a fluid exit; and

a first resonator tube supported by the body, the first resonator tube having a first tube inlet in the communication with the fluid inlet and a first tube outlet positioned in the first resonator chamber;

wherein the first resonator tube has a length l₁ that is equal to λ

₁/4 wherein λ

₁ is the acoustic component wavelength passing through the first resonator tube and the first chamber has a length l₂ that is within 20% of the length l₁.

8. The pulsation assembly of claim 7 wherein the first resonator chamber has a center and the first tube outlet is spaced from the first resonator chamber center.

9. The pulsation assembly of claim 7 wherein the first resonator tube and the first resonator chamber are configured such that the frequency attenuated by the first resonator tube matches a quarter wavelength mode of the first resonator chamber.

10. The pulsation assembly of claim 7 further comprising a second resonator chamber defined by the body adjacent to the first resonator chamber and a second resonator tube having a second tube inlet located in the first resonator chamber and a second tube outlet located within the second resonator chamber, wherein the second resonator tube has a length l₃ that is equal to λ

₂/4 wherein λ

₂ is the acoustic component wavelength passing through the second tube and the second chamber has a length l₄ that is within 20% of the length l₃.

11. The pulsation assembly of claim 10 wherein the first and second resonator chambers each have a center and the first tube outlet and the second tube inlet are spaced from the first resonator chamber center and the second tube outlet is spaced from the second resonator chamber center.

12. The pulsation assembly of claim 10 wherein the first resonator tube and the first resonator chamber are configured such that the frequency attenuated by the first resonator tube matches a quarter wavelength mode of the first resonator chamber and the second resonator tube and the second resonator chamber are configured such that the frequency attenuated by the second resonator tube matches a quarter wavelength mode of the second resonator chamber.

13. The pulsation assembly of claim 10 further comprising a third resonator chamber defined by the body and a third resonator tube having a third tube inlet located in communication with the fluid inlet and a third tube outlet located within the third resonator chamber, wherein the third resonator tube has a length l₅ that is equal to λ

₃/4 wherein λ

₃ is the acoustic component wavelength passing through the second tube and the second chamber has a length l₆ that is within 20% of the length l₅.

14. The pulsation assembly of claim 13 wherein the third resonator chamber has a center and the third tube outlet is spaced from the third resonator chamber center.

15. The pulsation assembly of claim 13 wherein the third resonator tube and the third resonator chamber are configured such that the frequency attenuated by the third resonator tube matches a quarter wavelength mode of the third resonator chamber.

16. The pulsation assembly of claim 13 further comprising a fourth resonator chamber defined by the body adjacent to the third resonator chamber and a fourth resonator tube having a fourth tube inlet located in the third resonator chamber and a fourth tube outlet located within the fourth resonator chamber, wherein the fourth resonator tube has a length l₇ that is equal to λ

₄/4 wherein λ

₄ is the acoustic component wavelength passing through the fourth tube and the fourth chamber has a length l₈ that is within 20% of the length l₅.

17. The pulsation assembly of claim 16 wherein the third and fourth resonator chambers each have a center and the third tube outlet and the fourth tube inlet are spaced from the third resonator chamber center and the fourth tube outlet is spaced from the fourth resonator chamber center.

18. The pulsation assembly of claim 16 wherein the third resonator tube and the third resonator chamber are configured such that the frequency attenuated by the third resonator tube matches a quarter wavelength mode of the third resonator chamber and the fourth resonator tube and the fourth resonator chamber are configured such that the frequency attenuated by the fourth resonator tube matches a quarter wavelength mode of the fourth resonator chamber.

19. The pulsation assembly of claim 16 wherein the second resonator chamber and the fourth resonator chamber each have an exit in fluid communication with the fluid exit.