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
- Subject:
- 42 ENGINEERING
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 = {Tue Feb 11 00:00:00 EST 2020},
month = {Tue Feb 11 00:00:00 EST 2020}
}
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