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Theoretical Study on the Performance of Mechanical Seals with Deep Grooves Used in Reactor Coolant Pump

Author: YuMingBin
Tutor: PengXuDong；BaiShaoXian
School: Zhejiang University of Technology
Course: Chemical Process Equipment
Keywords: Mechanical seal Hydrodynamic lubrication Surface deformation Wear and tear Finite Element Method
CLC: TH136
Type: Master's thesis
Year: 2010
Downloads: 79
Quote: 0
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Abstract


Mechanical seal as a key component of the nuclear main pump , the performance and reliability of a direct impact on the stability and security of the main pump running . The deep grooves end face hydrodynamic pressure mechanical seal is one of the main seal type nuclear main pump shaft seal is often used . The paper examines the state of high-parameter mechanical seal sealing performance , wear performance and its mechanism of action , the study has important theoretical significance and value of engineering application of China 's self-developed high-performance mechanical seals . First , based on the theory of fluid lubrication , the establishment of the arc deep groove hydrodynamic pressure -type mechanical seal mathematical analysis model , using the finite element method to analyze the impact of the geometric parameters of the end face of the morphology of the sealing performance , the results show that the deformation not consider deep groove mechanical seal dynamic pressure effect is small , static pressure effects ; pump startup process and speed small , shallow groove mechanical seal end face easier to open . Secondly, the establishment of the seal ring under pressure deformation of three-dimensional computational model of high parameters introduced to suppress deformation impact analysis than parameters as judgment basis , the pressure distribution and surface deformation coupling effect was studied , the results showed that the deformation of the sealing performance of the seal ring obvious impact , mainly to increase the stiffness of the seal and just drain than is conducive to the stable operation of the seal . Finally, prone to wear and tear of the secondary seal , combined with the U-shaped groove face seal application instance , the establishment of the wear of the mechanical seal performance analysis model using the finite element calculation of the form of face wear on the sealing performance , results that can the seal monitoring data to determine its state of wear , preventative maintenance , thus avoiding the significant loss of scram .

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CLC: > Industrial Technology > Machinery and Instrument Industry > Mechanical parts and gear > Other mechanical components
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