Finite Element Analysis on Thermal Deformation of T-shape Groove Dry Gas Seal

2010 ◽  
Author(s):  
Weibing Zhu ◽  
Na Li ◽  
Heshun Wang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Thermal Deformation ◽  
Element Analysis ◽  
Dry Gas Seal

Performance study of a back-depression mechanical dry gas seal

1998 ◽  
Vol 212 (4) ◽  
pp. 279-290 ◽  
Author(s):  
T. A. Stolarski ◽  
Y Xue
Keyword(s):  
Finite Element Analysis ◽  
Surface Roughness ◽  
Finite Element ◽  
Roughness Parameter ◽  
Design Procedure ◽  
Control Parameters ◽  
Roughness Parameters ◽  
Performance Study ◽  
Element Analysis ◽  
Dry Gas Seal

An aerostatic mechanical dry gas seal is described in this paper. The seal has shallow depression grooves (compensators) on the back and annular grooves on one of the working faces. With the help of the back depression grooves, a hydrostatic pressure and thereby a separating force with satisfactory stiffness are produced within the sealing gap. A model which takes surface roughness into account was used to predict the performance of the seal. Relationships between the control parameters (the recess position, rG, the nominal film thickness, h0, the depth, hv, of depression grooves and the surface roughness parameter, a) are investigated against various pressure ratios, pe/ pi. The analysis provides a simple optimum design procedure. A finite element analysis was carried out to account for the effect of face deformation during operation of the seal. Experiments for various speeds, pressures and roughness parameters were carried out and the results from the experiments were used to validate the analysis performed. Analysis and experiment revealed the importance of the surface roughness and deformation of the faces for the creation and retention of the gap.

scholarly journals Thermal monitoring and thermal deformation prediction for spherical machine tool spindles

2019 ◽  
Vol 23 (4) ◽  
pp. 2271-2279 ◽  
Author(s):  
Cheng-Biao Fu ◽  
An-Hong Tian ◽  
Her-Terng Yau ◽  
Mao-Chin Hoang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Machine Tool ◽  
Thermal Deformation ◽  
Thermal Error ◽  
Structural Deformation ◽  
Thermal Monitoring ◽  
Element Analysis ◽  
Deformation Prediction ◽  
Thermal Error Model

Machine tool operations and processing can cause temperature changes in various components because of internal and external thermal effects. Thermal deformations caused by thermal effect in machine tools can result in errors in processing size or shape and decrease processing precision. Thus, this paper focuses on the analysis of heating during machine tool spindle?s high speed operation, which is the heat source that causes component and structural deformation. In this paper, thermal monitoring was used to build a thermal error prediction model. Temperature change around the spindle was measured with a DS18B20, then multiple regression analysis was used to establish the relationship between thermal deformation quantity and temperature fields at specific points. Finally, finite element analysis was used to build the thermal error model. A solution for the correlation coefficient was obtained using the least squares method. The result of this study verified that finite element analysis can predict front bearing and rear bearing temperature rise, and is consistent with laboratory results. The error in thermal steady-state deformation prediction was less than 2 ?m. This information can be used by the controller to effectively compensate the processing and improve processing precision.

Parameterized Finite Element Analysis System of Turbine Rotor Thermal Deformation Based on the Secondary Development of ANSYS

2010 ◽  
Vol 33 ◽  
pp. 506-508 ◽  
Author(s):  
Na Jun Wang ◽  
Xiang Wang Jin ◽  
Jie Wang ◽  
Hai Long Diao
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Thermal Deformation ◽  
Turbine Rotor ◽  
Simple System ◽  
Secondary Development ◽  
Element Analysis ◽  
Analysis Process ◽  
Input Parameters ◽  
Analysis System

This paper establishes the workflow of ANSYS parameterized finite element analysis, based on this, the parameterized finite analysis system of turbine rotor thermal deformation is established. In this analysis system, to complete the analysis process, staff only needs to click on the buttons on the interface and input parameters. The results show that this method can avoid repetitive operations, improve the efficiency and this simple system is easily applied in the factory.

Thermal Deformation Finite Element Analysis for the Ram of Heavy-Duty CNC Machine Tools

2012 ◽  
Vol 433-440 ◽  
pp. 7159-7164 ◽  
Author(s):  
Yong Lu ◽  
Gang Wei Cui ◽  
Dong Gao ◽  
Heng Chao Xiang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Machine Tools ◽  
Thermal Deformation ◽  
Theoretical Data ◽  
Cnc Machine Tools ◽  
Cnc Milling ◽  
Heavy Duty ◽  
Cnc Machine ◽  
Element Analysis

The thermal deformation of ram system in a heavy-duty CNC milling-boring machine tool has a serious effect on its accurateness. This paper analyses quantificationally the temperature field and deformation field of the ram system, and gives the ram’s heat sources, calculating quantity of heat and transferring type of heat. And then a finite element analysis is performed, the analyzing results provide basic theoretical data for thermal error compensation in machine tools.

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