Thermohydrodynamic Analysis of Spiral Groove Mechanical Face Seal for Liquid Applications

2012 ◽  
Vol 134 (2) ◽  
Author(s):  
Yifan Qiu ◽  
M. M. Khonsari
Keyword(s):  
Temperature Distribution ◽  
Thermal Behavior ◽  
Parametric Study ◽  
Three Dimensional ◽  
Mechanical Seal ◽  
Face Seal ◽  
Cfd Model ◽  
Spiral Groove ◽  
Mechanical Face Seal ◽  
Overall Performance

In this study, a three-dimensional thermohydrodynamic (THD) CFD model is developed to study the characteristics of an inward pumping spiral groove mechanical seal pair using a commercial CFD software CFD-ACE + . The model is capable of predicting the temperature distribution and pressure distribution of the seal pair. Based on the CFD model, a parametric study is conducted to evaluate the performance of the seal. It is found that thermal behavior plays an important role in the overall performance of a seal. The spiral groove parameter can be optimized to achieve desired performance. The optimization is dependent on the application requirement of the seal.

Calculation Method of Mechanical Face Seal Temperature Based on Heat Conduction Angle

2012 ◽  
Vol 468-471 ◽  
pp. 500-504
Author(s):  
Jie Gao ◽  
Peng Yun Song ◽  
Xiao Yun Hu ◽  
Fang Bo Ma
Keyword(s):  
Heat Conduction ◽  
Temperature Distribution ◽  
Friction Condition ◽  
Mechanical Seal ◽  
Face Seal ◽  
Mechanical Seals ◽  
Key Technology ◽  
Mechanical Face Seal ◽  
And Control ◽  
Face Temperature

It is a key technology in the design and application of mechanical seals as how to determine and control its face temperature. According to the explicitly defined heat conduction angle, supposed the surfaces of the stator ring are insulation, and the heat produced by friction of seal faces transfers only through the rotor ring along the heat conduction angle, an approximate analytical method calculating the end face temperature distribution of mechanical seal was developed for mixed friction condition in this paper. The heat conduction angle, angular velocity, contact pressure and other factors and its law on end face temperature distribution have also been analyzed in this paper. The results of this method for calculating the end face temperature are much closer to the reality, compared with other approximate analytical methods.

A Thermo-Hydrodynamic Analysis of a Mechanical Face Seal

1992 ◽  
Vol 114 (4) ◽  
pp. 639-645 ◽  
Author(s):  
M. D. Pascovici ◽  
I. Etsion
Keyword(s):  
Boundary Conditions ◽  
Thermal Behavior ◽  
Temperature Variation ◽  
Energy Equation ◽  
Face Seal ◽  
Radial Temperature ◽  
Hydrodynamic Analysis ◽  
Implicit Equation ◽  
Face To Face ◽  
Mechanical Face Seal

A thermo-hydrodynamic analysis is performed for a face-to-face double seal configuration. Temperature and viscosity variations both across and along the sealing gap are considered and realistic boundary conditions are considered. The energy equation is solved analytically and the radial temperature variation is presented by an implicit equation. This approach enables analytical parametric investigation and gives better understanding of the effects of various parameters on the seal’s thermal behavior.

scholarly journals Feasibility of Contact Elimination of a Mechanical Face Seal Through Clearance Adjustment

1999 ◽  
Author(s):  
Min Zou ◽  
Joshua Dayan ◽  
Itzhak Green
Keyword(s):  
Pattern Recognition ◽  
Power Spectrum ◽  
Real Time ◽  
Parametric Study ◽  
Experimental Results ◽  
Face Seal ◽  
Angular Misalignment ◽  
Adjustment Mechanism ◽  
Mechanical Face Seal

The feasibility of eliminating contact in a noncontacting flexibly mounted rotor (FMR) mechanical face seal is studied. The approach for contact elimination is based on a parametric study using FMR seal dynamics. Through clearance adjustment it is possible to reduce the maximum normalized relative misalignment between seal faces and, therefore, eliminate seal face contact Clearance is measured by proximity probes and varied through a pneumatic adjustment mechanism. Contact is determined phenomenologically from pattern recognition of probe signals and their power spectrum densities as well as angular misalignment orbit plots, all calculated and displayed in real-time. The contact elimination strategy is experimentally investigated for various values of stator misalignment and initial rotor misalignment Contrary to intuition but compliant with the parametric study, the experimental results show that for the seal under consideration contact can be eliminated through clearance reduction.

Effect of Surface Roughness on Performance of Spiral Groove Gas Film Face Seal

2012 ◽  
Vol 184-185 ◽  
pp. 180-183 ◽  
Author(s):  
Gang Ma ◽  
Wei Zhao ◽  
Xin Min Shen
Keyword(s):  
Surface Roughness ◽  
Three Dimensional ◽  
Great Influence ◽  
Face Seal ◽  
Dimensional Model ◽  
Spiral Groove ◽  
Three Dimensional Model ◽  
Three Dimensional Flow ◽  
Gas Face Seal ◽  
Effect Of Surface

The three dimensional model was established for studying performance of spiral groove gas face seal. According to machining features of different surface area, the seal face can be divided into three parts, rotor ring grooved area, rotor ring non-grooved area and static ring area. The effect of roughness on seal performance was analyzed based on calculation of three dimensional flow field. The analysis results show that the surface roughness of rotor ring grooved area has great influence on the seal performance, but the influence is little when roughness on non-grooved rotor ring surface and static ring surface. The influence must be considered when surface roughness of rotor ring grooved area bigger than 0.2μm. Roughness of rotor ring surface can increase the loading force while it also can cause the increase of leakage. It is important to select rational roughness when designing gas face seal.

A Finite Element Cavitation Algorithm Using Free Mesh for Mechanical Face Seal

2011 ◽  
Vol 199-200 ◽  
pp. 670-677 ◽  
Author(s):  
Jing Hao Li ◽  
Xiang Feng Liu ◽  
Wei Feng Huang ◽  
Yu Ming Wang
Keyword(s):  
Finite Element Method ◽  
Boundary Condition ◽  
Finite Element ◽  
Reynolds Equation ◽  
Mass Conservation ◽  
Computational Domain ◽  
Mechanical Seal ◽  
Face Seal ◽  
Sliding Bearings ◽  
Mechanical Face Seal

A finite element cavitation algorithm to Reynolds equation is presented for the calculation of the flow field in the film between the faces of the mechanical seal. As using free mesh, the algorithm is particularly useful for the computational domain which shape is complex. The JFO boundary condition which satisfies mass conservation is implemented by introducing Kumar and Booker’s algorithm. A non-traditional finite element method is derived to avoid the process of the functional analysis and can obtain the flow rate on boundaries conveniently. The results show that the algorithm is reliable, effective and correspond to the literature results. Moreover, the algorithm can be also used for the sliding bearings lubrication problem which shows the well adaptability.

Parametric Study on a Wavy-Tilt-Dam Mechanical Face Seal in Reactor Coolant Pumps

2011 ◽  
Vol 54 (6) ◽  
pp. 878-886 ◽  
Author(s):  
Wei Liu ◽  
Ying Liu ◽  
Yuming Wang ◽  
Xudong Peng
Keyword(s):  
Parametric Study ◽  
Face Seal ◽  
Reactor Coolant ◽  
Mechanical Face Seal

Experimental Thermal Analysis of a Mechanical Face Seal

2016 ◽  
Vol 8 (3) ◽  
Author(s):  
K. Ayadi ◽  
N. Brunetière ◽  
B. Tournerie ◽  
A. Maoui
Keyword(s):  
Heat Transfer ◽  
Thermal Analysis ◽  
Thermal Effects ◽  
Inverse Method ◽  
Fluid Pressure ◽  
Operating Conditions ◽  
Mechanical Seal ◽  
Face Seal ◽  
Rotating Speed ◽  
Mechanical Face Seal

An experimental study quantifying the thermal behavior of a mechanical seal is performed. Temperature measurements are obtained using embedded thermocouples within the stator at different locations, and the tests are carried out at different sealed fluid pressures and rotary shaft speeds. Furthermore, an inverse method is used to calculate the heat transfer from the measured local temperatures. The Nusselt number is calculated along the wetted surface as a function of operating conditions; the obtained values are discussed in comparison to previous works. Our results demonstrate that the amplitude of the thermal effects is highly dependent on the operating conditions. The temperature rise being increased by 600% when the rotating speed is raised from 1000 to 6000 rpm and the fluid pressure from 1 to 5 MPa. Moreover, the temperature can vary by several degrees when the distance from the wetted diameter (cooled by convection) and the friction face (heat source) is varied from less than 2 mm.

A Thermal-Mechanical Analysis Model for Composite Overwrapped Pressure Vessel for Hydrogen During Fast Filling

2019 ◽  
Author(s):  
Y. Jiang ◽  
M. Xu ◽  
Zhichao Fan ◽  
Chen Xuedong ◽  
Q. G. Wu
Keyword(s):  
Temperature Distribution ◽  
Pressure Vessel ◽  
Three Dimensional ◽  
Element Model ◽  
Mechanical Analysis ◽  
Cfd Model ◽  
Analysis Model ◽  
Temperature Increment ◽  
Thermal Mechanical Analysis ◽  
Metallic Liner

Abstract Composite overwrapped pressure vessel (COPV) is considered to be the most promising storage tank for hydrogen. Filling the COPV to high pressure within 3–5 minutes generates temperature increment due to negative Joule-Thomson coefficient and compression effect of hydrogen. This temperature increment induces a non-uniform temperature distribution in the COPV. The difference between the physical properties of inner metallic liner and outer composite will produce thermal stress. In this work a computational fluid dynamics (CFD) model is built to simulate the temperature increment during fast filling of the COPV. A three-dimensional thermal-mechanical finite element model for COPV is set up. The temperature distribution of the COPV by the CFD model is input into the thermal-mechanical model to analyze the stress distribution during the fast filling. This thermal-mechanical analysis model will provide technical support for the design of COPV.

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