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Title: Mechanical seal with high pressure high temperature secondary seal

Abstract

A secondary seal of a mechanical seal comprises an annular sealing gasket and backing plate surrounding a cylindrical sealing surface, all of which can be made of the same metallic material. The gasket is C-shaped in cross section, and is axially pressed during operation into a C-shaped groove formed in the backing plate, the groove being shallower and larger in inner diameter than the gasket, so that the gasket, when pressed into the groove, deforms radially inward and seals against both the backing plate and the sealing surface. The contact area between the gasket and sealing surface increases with pressure. In embodiments, when the pressure is released, the gasket retracts from the sealing surface, allowing easy disassembly and allowing axial movement of the gasket and backing plate. Highly polished surfaces of the gasket and sealing surface can allow axial motion thereof during operation to maintain the seal face gap.

Inventors:
;
Issue Date:
Research Org.:
Flowserve Management Company, Irving, TX (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1632543
Patent Number(s):
10557554
Application Number:
16/008,214
Assignee:
Flowserve Management Company (Irving, TX)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F16 - ENGINEERING ELEMENTS AND UNITS F16J - PISTONS {
DOE Contract Number:  
CRADA 1872.00.00
Resource Type:
Patent
Resource Relation:
Patent File Date: 06/14/2018
Country of Publication:
United States
Language:
English

Citation Formats

Hamilton, Eric, and Nelson, Daniel. Mechanical seal with high pressure high temperature secondary seal. United States: N. p., 2020. Web.
Hamilton, Eric, & Nelson, Daniel. Mechanical seal with high pressure high temperature secondary seal. United States.
Hamilton, Eric, and Nelson, Daniel. Tue . "Mechanical seal with high pressure high temperature secondary seal". United States. https://www.osti.gov/servlets/purl/1632543.
@article{osti_1632543,
title = {Mechanical seal with high pressure high temperature secondary seal},
author = {Hamilton, Eric and Nelson, Daniel},
abstractNote = {A secondary seal of a mechanical seal comprises an annular sealing gasket and backing plate surrounding a cylindrical sealing surface, all of which can be made of the same metallic material. The gasket is C-shaped in cross section, and is axially pressed during operation into a C-shaped groove formed in the backing plate, the groove being shallower and larger in inner diameter than the gasket, so that the gasket, when pressed into the groove, deforms radially inward and seals against both the backing plate and the sealing surface. The contact area between the gasket and sealing surface increases with pressure. In embodiments, when the pressure is released, the gasket retracts from the sealing surface, allowing easy disassembly and allowing axial movement of the gasket and backing plate. Highly polished surfaces of the gasket and sealing surface can allow axial motion thereof during operation to maintain the seal face gap.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {2}
}

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Works referenced in this record:

Non-contacting face seal
patent, December 1994


Secondary seal with mechanical gas seal
patent, December 1997


Low breakout friction energized gasket
patent, August 2012


Reverse pressure tolerant seal means
patent, September 1998


Secondary sealing element
patent, July 2007