Abstract
Numerical analysis is employed to investigate the influence of parting surface and combined thermal factor (rotation) on deformation of split mechanical seal. Parting surface takes little effect on the temperature distribution, verified by comparison experiment. Shaft rotation speed does not much affect the radial temperature gradient of the seal end faces but can raise the temperature when being increased. The simulated model turns to a drum, with the parting surfaces, close to the primary sealing interface presenting a convergent taper, becoming open-shaped. Increasing rotation dramatically intensifies the seal end face deformation of both split stationary and rotating seal rings and slightly increases the convergent taper size of the primary sealing interface. However, it takes little effect on the parting surface deformation. Compared with integral mechanical seal, parting surfaces distinctly reduce the primary sealing interface cone as well as the seal end face deformation of both split seal rings.
Highlights
Mechanical seals have been widely applied in various occasions, such us marine, aeronautical, electric, and petrochemical industries
An integral mechanical seal model is analyzed to investigate the effect of parting surfaces
While the similar difference values are resulting from the convection on stationary ring almost being unaffected by the shaft rotation
Summary
Mechanical seals have been widely applied in various occasions, such us marine, aeronautical, electric, and petrochemical industries. Friction and wear happen between seal end faces of rotating and stationary rings during operation or when working conditions change. The induced failure, such as leakage and end of operational life, can lead to a long-term shutdown of machinery to repair or replace the damaged mechanical seals. We have to remove the damaged ones after taking down all impeding parts over the end of shaft and reinstall with the replaced seals. Current researches on split mechanical seals are mainly restricted to their geometry, proving the design feasibility with reasonable methods to connect the parting surfaces of all split rings.[8,9,10,11,12] split mechanical
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