Granted Patent B2

US 12,729,672 · App. 18/873,427 · Granted Sep 8, 2026

Inventor: Daniel Guariglia (Wilrijk, BE)

Assignee: ATLAS COPCO AIRPOWER, NAAMLOZE VENNOOTSCHAP

F04B39/0061F01N1/083F04B39/0066F04B39/0072F04C29/063F04C29/065

Abstract

Claims (28)

1 . An inlet silencer for a volumetric compressor, comprising:

a housing ( 2 ) having at least one inlet ( 3 ) and at least one outlet ( 4 ),

wherein at least one partition wall ( 6 ) dividing the housing ( 2 ) into a first chamber ( 7 ) and a second chamber ( 8 ) is provided in the housing ( 2 ),

wherein one chamber ( 7 , 8 ) connects to the inlet ( 3 ) and one chamber ( 7 , 8 ) connects to the outlet ( 4 ),

wherein at least one opening ( 9 ) connecting both chambers ( 7 , 8 ) is arranged in the partition wall ( 6 ),

wherein, in the first chamber ( 7 ), at least one reversing plate ( 12 ) or baffle is arranged ( 7 ) crossing the geometrical line ( 13 ) between the inlet ( 3 ) and said opening ( 9 ),

wherein the reversing plate ( 12 ) or the baffle partially divides the first chamber ( 7 ) into several sub-chambers ( 7 a , 7 b , 7 c ) such that an airflow flowing from the inlet ( 3 ) to one of the at least one openings ( 9 ) must flow around the reversing plate ( 12 ) or the baffle, and

wherein, in the first chamber ( 7 ), a fraction of a linear distance of the geometrical line ( 13 ) between the inlet ( 3 ) and said opening ( 9 ) and a distance of a shortest flowpath from the inlet ( 3 ) to said opening ( 9 ) around the reversing plate ( 12 ) or the baffle is a maximum of 2.5,

wherein an inlet filter ( 20 ) is arranged in the second chamber ( 8 ) such that the gas entering the second chamber ( 8 ) must pass through the inlet filter ( 20 ) before it can leave the second chamber ( 8 ), and

wherein the reversing plate ( 12 ) or the baffle is provided only in the first chamber ( 7 ), among the first chamber ( 7 ) and the second chamber ( 8 ).

2 . The inlet silencer according to claim 1 , wherein the first chamber ( 7 ) connects to the inlet ( 3 ) and the second chamber ( 8 ) connects to the outlet ( 4 ).

3 . The inlet silencer according to claim 2 , wherein the housing ( 2 ) is provided with a closable access ( 21 ) for removing or replacing said inlet filter ( 20 ).

4 . The inlet silencer according to claim 1 , wherein sound-absorbing material ( 14 ) is arranged at least in the first chamber ( 7 ) or at least in the second chamber ( 8 ).

5 . The inlet silencer according to claim 4 , wherein the sound-absorbing material ( 14 ) is arranged on at least one side ( 17 ) of the partition wall ( 6 ), wherein a passage ( 18 ) is provided in the sound-absorbing material ( 14 ) at the location of said opening ( 9 ) to form a channel ( 19 ).

6 . The inlet silencer according to claim 4 , wherein the sound-absorbing material ( 14 ) is a permeable material including polyurethane foam, melamine foam, viscoelastic foam, rock wool, glass wool or an acoustic cloth.

7 . The inlet silencer according to claim 1 , wherein sound-absorbing material ( 14 ) is arranged on said reversing plate ( 12 ).

8 . The inlet silencer according to claim 1 , wherein said at least one opening ( 9 ) is arranged near a corner ( 10 ) of the partition wall ( 6 ) such that the distance (A) between the at least one opening ( 9 ) and said corner ( 10 ) is smaller than the distance (B) between the at least one opening ( 9 ) and a centre ( 11 ) of the partition wall ( 6 ).

9 . The inlet silencer according to claim 1 , wherein a volume of the second chamber ( 8 ) is at least 50% of a volume of the first chamber ( 7 ).

10 . The inlet silencer according to claim 1 , wherein a total surface area of the at least one opening ( 9 ) is larger than a particular value, such that a velocity of the gas through the at least one opening ( 9 ) is at most 30 meters per second.

11 . The inlet silencer according to claim 1 , wherein the housing ( 2 ) is beam-shaped.

12 . The inlet silencer according to claim 1 , wherein the at least one opening ( 9 ) in the partition wall ( 6 ) is created by at least one pipe or conduit extending through the partition wall ( 6 ) or that in this at least one opening ( 9 ) at least one pipe or conduit is arranged, wherein open ends of said pipe or conduit are situated in the first chamber ( 7 ) and second chamber ( 8 ).

13 . A volumetric compressor provided with a gas inlet, wherein the volumetric compressor further comprises the inlet silencer ( 1 ) according to claim 1 , which is arranged on the said gas inlet.

14 . The volumetric compressor according to claim 13 , wherein the compressor is a tooth compressor, screw compressor or piston compressor.

15 . The inlet silencer according to claim 1 , wherein the housing ( 2 ) is beam-shaped,

wherein a volume of the second chamber ( 8 ) is at least 50% of a volume of the first chamber ( 7 ),

wherein the inlet silencer is configured to output compressed gas at a maximum rate of 140 litres per second, and

wherein a total surface area of the at least one opening ( 9 ) is at least a predetermined value such that a velocity of the gas through the at least one opening ( 9 ) is at most 30 meters per second.

16 . The inlet silencer according to claim 1 , wherein the first chamber is configured to dampen sound waves of a first frequency, and the second chamber is configured to dampen sound waves of a second frequency that is less than the first frequency.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (40)