Duct wall structure

Details Duct wall structure Duct wall structure

2004-08-06

2009-06-23

Donels, Jeffrey (Department: 2837)

Acoustics

Sound-modifying means

Muffler, fluid conducting type

C181S293000, C052S293300, C052S796100

Reexamination Certificate

active

07549507

ABSTRACT:
The invention relates to an inner heat insulating and inner sound insulating structure of an HRSG duct wall in which a turbine combustion high temperature and high velocity gas whose temperature is approx. 650° C. and velocity is 30 meters per second (m/s) flows, wherein heat insulating members are filled between the inner plate at the gas flow side and the outer plate at the atmospheric side, an intermediate member is disposed at a middle portion between the inner plate and the outer plate, spacing between the inner plate and the intermediate member is retained by stud bolts while spacing between the outer plate and the intermediate member is retained by stud bolts, and the stud bolt and the outer plate are tightened via a vibration deadening washer. When the vibration deadening washer is disposed at a position in the interior of the heat insulating member, where it is not influenced by the temperature of a gas flowing in the interior of the duct and is not influenced by wearing resulting from the gas, that is, the washer is attached at a position whose temperature becomes 400° C. or less, which is half the entire thickness of the heat insulating member, apart from the high temperature side, or at a position therebelow, the durability thereof is high and the heat insulating and sound insulating performance can be maintained for a longer period of time.

REFERENCES:
patent: 1495993 (1924-06-01), Farmer
patent: 2310274 (1943-02-01), Beckett
patent: 2900127 (1959-08-01), Smith
patent: 2915134 (1959-12-01), Braund
patent: 5509242 (1996-04-01), Rechsteiner et al.
patent: 51-143915 (1976-12-01), None
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patent: 1-94136 (1989-04-01), None
patent: 6-10646 (1994-01-01), None
patent: 9-279717 (1997-10-01), None
patent: 09279717 (1997-10-01), None
patent: 10-121599 (1998-05-01), None
patent: 10121599 (1998-05-01), None
patent: 10-205680 (1998-08-01), None
patent: 11-351488 (1999-12-01), None
patent: 2000-27333 (2000-01-01), None
patent: 2000027333 (2000-01-01), None
patent: 2002-206211 (2002-07-01), None
patent: 2002206211 (2002-07-01), None
English language Abstract of JP 51-143915.
English language Abstract of JP 11-351488.
English language Abstract of JP 52-92501.
English language Abstract of JP 9-279717.
English language Abstract of JP 2000-27333.
English language Abstract of JP 2002-206211.
English language Abstract of JP 10-121599.
English language Abstract of JP 10-205680.
English language Abstract of JP 6-10646.
English language Abstract of JP 1-94136.

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