Elements of the theory of closed-loop mechanisms formed by rolling bodies without kinematic sliding
Date
2019-03-20
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Видавництво Львівської політехніки
Lviv Politechnic Publishing House
Lviv Politechnic Publishing House
Abstract
In the modern industry, it is impossible to do without high-tech equipment, for the
designing of which the practical experience and experience of scientists are used. The main principles
of engineering mechanics are based on the improvement of technical processes that promote creating
certain conditions for the development of the manufacturing industry. An innovative approach to
solving the problems of designing and creating any equipment makes it possible to combine new
technologies and scientific and technical studies.
When designing process equipment, there is a need not only to improve the existing types but
also to search for new principles for connecting the supporting elements. It is important to create the
right conditions for the effective functioning of reliable mechanisms.
The main elements of the process equipment are the supporting ones. Among them, the bearings
are the most important elements. Their reliable and long-term operation depends on the structural
features of the supports.
When designing the bearing units, they take into account the purpose of the mechanism, its
operating conditions, the magnitude and direction of the loadings applied to the bearings, the required
resource, the rotation frequency, the temperature and the state of the environment.
In real bearings, there are no two fixed guides, and the separation is ensured by an intermediate
element, which is connected by sliding friction. Besides, modern oil and gas equipment also usesradial
supports through which a working fluid circulates with impurities of abrasive particles, which quickly
destroys this element. Therefore, there is a need to create a scientific basis for the design of
fundamentally new modern bearings.
The purpose of the work is to find the optimum range of existence of closed-loop mechanisms
formed by rolling bodies without kinematic sliding and to obtain the analytical dependences that relate
the geometric parameters of the bearings to the separation by the rolling bodies in the absence of
sliding. In this case, all three drive types are considered: from the outer or inner clip or the two clips
together. To ensure the workability of all types of radial bearings, a range of specific basic conditions
should be met.
Given the significant advantages of these types of mechanisms, the challenge arises for their
further study, with a view to wide implementation and practical application. The results can be useful
for designing support elements for equipment used in many manufacturing fields.
Description
Keywords
mechanism, rolling bodies, bearing, kinematic sliding, sliding friction, bearing
Citation
Vorobyov M. Elements of the theory of closed-loop mechanisms formed by rolling bodies without kinematic sliding / Mykola Vorobyov, Denis Prokopenko // Ukrainian Journal of Mechanical Engineering and Materials Science. — Lviv : Lviv Politechnic Publishing House, 2019. — Vol 5. — No 1. — P. 73–84.