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Математическая модель течения сжимаемой смазки в зазоре частично пористого подшипника с внешним наддувом газа

Математическая модель течения сжимаемой смазки в зазоре частично пористого подшипника с внешним наддувом газа

Abstract

Рассмотрено аналитическое решение задачи определения поля давления в зазоре частично пористого цилиндрического подшипника с внешним наддувом газа, работающего в режиме подвеса (при не вращающемся вале) и в гибридном режиме (при вращающемся вале). Решение базируется на классических в теории газовой смазки допущениях о течении смазочного слоя в зазоре подшипника. В основе лежит решение модифицированного уравнения Рейнольдса и уравнения течения сжатого газа через пористую матрицу. В рамках метода непрерывных линий наддува газа уравнения течения смазки при неподвижном вале решаются методом разделения переменных. Газодинамическая составляющая давления в гибридном режиме работы находится с помощью метода разложения по малому параметру. Это позволяет сравнительно просто определить поле давления в зазоре подшипника. Сравнение теоретических результатов с опытными данными показало вполне удовлетворительную для инженерных расчетов точность.

Analytical solution of the considered task definition’s pressure in the gap partially porous cylindrical bearings with external supercharged gas suspension mode (when not rotating shaft) and hybrid mode (with the rotating shaft). The solution is based on the classical theory of gas lubrication for lubricating layer assumptions in the gap of the bearing. The decision was based on a modified Reynolds equation and the equation of compressed gas flow through porous matrix. The method of continuous lines of gas flow adjuster, equations with fixed shaft lubrication are solved by separation of variables. Gas-dynamic pressure component in a hybrid mode decomposition method is a small parameter. This makes it relatively easy to determine the pressure field in the gap of the bearing. Comparison of the theoretical results with experienced data showed quite satisfactory for engineering calculations precision.

Keywords

ПОРИСТАЯ СРЕДА, ГАЗОВЫЙ ПОДШИПНИК, ГАЗОВАЯ СМАЗКА, СМАЗОЧНЫЙ СЛОЙ, НЕСУЩАЯ СПОСОБНОСТЬ, ОТНОСИТЕЛЬНЫЙ ЭКСЦЕНТРИСИТЕТ, ЧИСЛО СЖИМАЕМОСТИ

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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