pg_0037
The Patent Office Journal 28/04/2006
8366
(12)
PATENT APPLICATION PUBLICATION
(19)
INDIA
(21)
Application No.: 2893/DEL/1998
A
(22)
Date of filing of Application: 28.9.1998
(43)
Publication Date:28/04/2006
(54)
Title of the invention:
:
“ A HIGH-TEMPERATURE SHAFT SEAL FOR GAS FLOW DIVERTER IN A
COMBINED CYCLE POWER PLANT"
(51)
International classification
:
F16K 15/00
(31)
Priority Document No
:
NIL
(32)
Priority Date
:
NIL
(33)
Name of priority country
:
NIL
(86)
International Application No
and Filing Date:
:
NA
(87)
International Publication No
:
NA
(61)
Patent of addition to Application
No
:
NA
Filed on
:
NA
(62)
Divisional to Application No
:
Filed on
:
(71)
Name of Applicant: BHARAT
HEAVY ELECTRICALS LTD
Address of the Applicant:
Bhel House , Siri Fort, New
Delhi-110049
(72)
Name of the Inventor:
1. KAUSHAL KISHORE
CHATORVED
2. CHELLAPILLA
KAMESWARA RAO
Filed U/S 5(2) before The
Patents (Amendment)
Ordinance, 2004: NO
(57) Abstract: The invention relates to a high temperature shaft seal for gas divertor in a combined cycle power plant comprising a seal
housing (1) having a cover plate (2) and a seal element (3) sealing a drive shaft (5) wherein the said element (3) is having a plurality of
segments (4) movable readially inward for adjustment of the gap caused by wear between the drive shaft (5) and the seal (3) and between
any two adjacent segments (4) can be closed, in inner diameter being bent at an angle (A) upto 45
0
towards gas pressure (6) side from the
air/ bearing side (7) and the inner diameter of the said seal (3) is kept at smaller than the diameter of the drive shaft (5) so that the edge of
the seal element (3) site against the drive shaft (5) surface with finite pressure at the contact line to ensure zero gap at all operating
temperature and pressure.
