Abstract
Abstract Numerical simulation method of the working process of a centrifugal unit contactless face impulse seal is proposed. A seal functioning physical model was created. Its operation key aspects that are not taken into account in the traditional methods of calculating contactless impulse seals are identified. A numerical simulation of seal working process based on the Reynolds equation solution for the medium vortex-free motion in the gap between moving surfaces is proposed. Hypothesis that simplify the equation’s numerical solution for the face impulse seal is formulated. The numerical solution is obtained using the boundary element method. Based on the obtained numerical solution, the distribution of the working medium pressure field in the seal gap is simulated.
Highlights
Double and tandem seals with liquid lubrication are widely used in chemical production equipment, but since late 20 century leading companies have been developing double gas seals designs for pumps and chemical production devices, which in their performance characteristics significantly exceed seals with liquid lubrication [1, 8]
Main aim of this paper is to provide an analysis-based approach to determining a critical seal characteristic such as pressure distribution in the operation face gap
We propose a method for determining the pressure distribution in the impulse seal gap, taking into account both the radial gas flow due to the difference between the sealing and atmospheric pressure, and the circumferential flow caused by the sealing surfaces relative rotation [36, 37, 38, 39]
Summary
Double and tandem seals with liquid lubrication are widely used in chemical production equipment, but since late 20 century leading companies have been developing double gas seals designs for pumps and chemical production devices, which in their performance characteristics significantly exceed seals with liquid lubrication [1, 8]. The vast majority of these seals use the gas-dynamic principle of operation by creating a gas-dynamic lifting force with, spiral, logarithmic or other microgrooves on the working surfaces, that provides a non-contact mode of operation when unit rotor rotates [12, 13] They are not inferior to the newly developed a contactless gas-barrier face seal design, which uses impulse operation principle (IGBFS) [2, 35]. The seal design is simple, compact and due to the impulse principle of creating a gap is able to maintain performance in a wide range of sealing and barrier pressures [14, 15] The creation of this type new seals is impossible without the development of a theoretical model of its operation process. The basis for the creation of such a model is the analysis of the experimental studies results of the seal function in different modes of operation
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
