Mechanical seal with reinforced polytetrafluoroethylene bellows

1971 ◽  
Vol 7 (4) ◽  
pp. 359-360
Author(s):  
G. V. Antipin ◽  
M. T. Bannikov ◽  
Yu. I. Tikhonov
Keyword(s):  
Mechanical Seal

Fully Split Mechanical Seal for Shaft Wobbling

2015 ◽  
Vol 69 (5) ◽  
pp. 490-496
Author(s):  
Takashi Kamizono
Keyword(s):  
Mechanical Seal

scholarly journals Two-scale homogenization of hydrodynamic lubrication in a mechanical seal with isotropic roughness based on the Elrod cavitation algorithm

2021 ◽  
pp. 135065012110176
Author(s):  
Yanxiang Han ◽  
Qingen Meng ◽  
Gregory de Boer
Keyword(s):  
Surface Topography ◽  
Carrying Capacity ◽  
Hydrodynamic Lubrication ◽  
Tribological Performance ◽  
Stribeck Curve ◽  
Polar Coordinate System ◽  
Load Carrying Capacity ◽  
Mechanical Seal ◽  
Macro Scale ◽  
Load Carrying

A two-scale homogenization method for modelling the hydrodynamic lubrication of mechanical seals with isotropic roughness was developed and presented the influence of surface topography coupled into the lubricating domain. A linearization approach was derived to link the effects of surface topography across disparate scales. Solutions were calculated in a polar coordinate system derived based on the Elrod cavitation algorithm and were determined using homogenization of periodic simulations describing the lubrication of a series of surface topographical features. Solutions obtained for the hydrodynamic lubrication regime showed that the two-scale homogenization approach agreed well with lubrication theory in the case without topography. Varying topography amplitude demonstrated that the presence of surface topography improved tribological performance for a mechanical seal in terms of increasing load-carrying capacity and reducing friction coefficient in the radial direction. A Stribeck curve analysis was conducted, which indicated that including surface topography led to an increase in load-carrying capacity and a reduction in friction. A study of macro-scale surface waviness showed that the micro-scale variations observed were smaller in magnitude but cannot be obtained without the two-scale method and cause significant changes in the tribological performance.

Shape Optimization and Strength Evaluation of Metal Welded Bellows Wave of Mechanical Seal

2008 ◽  
Vol 33-37 ◽  
pp. 1377-1382 ◽  
Author(s):  
Halida Musha ◽  
Mamtimin Gheni ◽  
Buhalqam
Keyword(s):  
Numerical Simulation ◽  
Bone Mass ◽  
Boundary Conditions ◽  
Shape Optimization ◽  
Reaction Diffusion ◽  
Mechanical Seal ◽  
Forming Process ◽  
Strength Evaluation ◽  
Fem Method ◽  
Initial Load

In this paper, the iBone (Imitation Bone) model which is coupled with Turing reaction-diffusion system and FEM, is used. The numerical simulation of bone forming process by considering the osteoclasts and osteoblasts process are conducted. The bone mass is increased with increase of the initial load value, then fibula and femur bones are obtained respectively by keeping the required bone forming value. The new S shape wave of metal welded bellow of mechanical seal are designed based on the the optimization results through this method. The S shape and V shape both were analyzed with FEM method. The same boundary conditions were given for two types of wave. The results are shown that the stresses mainly concentrated on the welded area. It is interesting that the value of the stresses of the two types of wave basically same. However, compressibility of the two types of wave is very different at the same computation stage. The compressibility of S shape wave was higher than V shape.

281. An evaluation of the critical pv-values of carbons for a mechanical seal by thermal shock testing

Carbon ◽  
1982 ◽  
Vol 20 (2) ◽  
pp. 156
Author(s):  
S. Sato ◽  
K. Kawamata ◽  
J. Aizawa ◽  
M. Ishii
Keyword(s):  
Thermal Shock ◽  
Mechanical Seal ◽  
Shock Testing

A Numerical Simulation of 3-D Inner Flow in Up-Stream Pumping Mechanical Seal

2006 ◽  
Vol 18 (5) ◽  
pp. 572-577 ◽  
Author(s):  
Jin-feng Zhang ◽  
Shou-qi Yuan ◽  
Yong-hong Fu ◽  
Yu-jian Fang
Keyword(s):  
Numerical Simulation ◽  
Mechanical Seal

Numerical investigation on the performance of impeller back seal configuration in a supercritical CO2 radial-inflow turbine

2021 ◽  
pp. 095440622110095
Author(s):  
Qiuwan Du ◽  
Yuqi Wang ◽  
Di Zhang ◽  
Yonghui Xie
Keyword(s):  
Numerical Investigation ◽  
Supercritical Co2 ◽  
Labyrinth Seal ◽  
Brayton Cycle ◽  
Mechanical Seal ◽  
Nozzle Outlet ◽  
Excellent Performance ◽  
Core Component ◽  
Comprehensive Performance ◽  
Radial Inflow Turbine

Radial-inflow turbine is a core component in supercritical CO2 (SCO2) Brayton cycle. The leakage from the nozzle outlet towards the impeller back brings a great challenge to the efficiency and security of the power system. In this paper, the labyrinth seal (LS) and dry gas seal (DGS) are arranged on the impeller back of a SCO2 radial-inflow turbine and the influence on the comprehensive performance is investigated. Results demonstrate that both LS and DGS configurations can significantly reduce leakage of the impeller back and DGS configuration performs better. Compared with the configuration without leakage, the power and efficiency of DGS configuration are only reduced by 0.27% and 0.35% respectively. The seal clearance and the inlet width have a greater effect on LS configuration. The thermo-mechanical seal deformation values of DGS configurations are all less than 8 μm, which verifies the feasibility. Finally, a novel combined seal configuration with both LS and DGS is proposed and excellent performance is achieved, providing a potential approach for the sealing problem of SCO2 radial-inflow turbine.

An investigation of fretting behavior of thermoplastic polyurethane for mechanical seal application

2018 ◽  
Vol 72 ◽  
pp. 271-284 ◽  
Author(s):  
C. Wang ◽  
A. Hausberger ◽  
M. Berer ◽  
G. Pinter ◽  
F. Grün ◽  
...  
Keyword(s):  
Thermoplastic Polyurethane ◽  
Mechanical Seal
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