TECHNOLOGICAL SOLUTIONS OF THE STATIONARY TASK OF WORKING LIQUIDS FOR INCREASING THE DURABILITY OF MAIN DRIVE GEARS OF HIGH-POWER LATHES
Journal Title: Сучасний стан наукових досліджень та технологій в промисловості - Year 2017, Vol 1, Issue 1
Abstract
The subject of the research in the article are questions connected with the refined solutions of the isothermal stationary problem for the lubricating cooling liquid in the Newtonian state, taking into account the forces acting in the meshing of the cylindrical gears and the frictional forces arising on the active surfaces of the teeth in the area of contacting the involute surfaces and the thickness of the oil layer with taking into account the hydrodynamic characteristics of the lubricating fluid. The goal is to build a model of contact-hydrodynamic calculation of gear transmission. Objectives: to consider setting the thickness of the lubricating layer at a given external load, the speed of motion to determine the presence or absence of fluid friction, with the acquisition of initial data to determine the operability and durability of the coupled heavy loaded and critical gears of heavy lathes. The following results are obtained. The article presents a model developed by the authors for obtaining the correspondence of approximate and refined solutions in establishing the connection between the maximum contact-hydrodynamic pressure and the maximum Gertsev pressure. The analysis showed that for any operating parameters the maximum contact-hydrodynamic pressure should be less than or equal to the maximum Gertsev pressure. In the hydrodynamic (liquid) or boundary (semi-liquid) modes of friction, the oil layer not only significantly affects the wear state of the teeth, power loss and contact temperature, but also acts as an elastic medium damping the impact and changing the load distribution along the length of the contact lines. Thus, for closed involute transmissions with surface-hardened chemical-thermal treatment of teeth, the most urgent is to prevent deep (sublayer) damage caused by the concentration of the load in the gearing. Conclusions. The main physico-mechanical and chemical characteristics of the oil film under conditions of loaded contact of the engagement elements, namely the thickness of the oil layer and the coefficient of friction are the most important complex criterial parameters determining the beginning and the course of the process of contacting high-speed heavy-duty gears of the main drives of heavy lathes with CNC.
Authors and Affiliations
Viktor Kovalev, Alexander Shelkovoy
Keywords
Related Articles
- EP ID EP279989
- DOI 10.30837/2522-9818.2017.1.036
- Views 63
- Downloads 0
THE THEORETICAL FRAMEWORK FOR DETERMINING THE QUALITY OF LIFE
The object of the study is the process of determining the quality of the life of the population. The subject of the study is methodological approaches, methods for determining the quality of life that affect the quality...
THE ANALYSIS OF THE ENVIRONMENT OF COMMERCIALIZATION OF SCIENTIFIC AND TECHNICAL DEVELOPMENTS AT UNIVERSITY
The subject matter of the article is the commercialization of scientific and technical developments in Ukrainian universities. The goal of the work is to develop the systematic approach to the processes of commercializat...
ENTERPRISE ECONOMIC SECURITY: ESSENTIAL CHARACTERISTICS OF THE CONCEPT
The subjectmatter of the study is determining the essence of economic security. The aim is to systematize the approaches to the interpretation of the concept "enterprise economic security". The immediacy of the study is...
USING THE ECONOMIC AND MATHEMATICAL MODELS FOR DETERMINING THE MARKET CAPACITY
The subject matter of the article is economic and mathematical forecasting models of the market capacity based on the system of influential factors. The goal is to systematize and substantiate theoretical and methodologi...
COMPLIANCE CONTROL FOR ENSURING THE FINANCIAL SECURITY OF BANKING INSTITUTIONS: STATE, PROBLEMS, PROSPECTS
The subject matter of the article is conceptual and applied aspects of the implementation of the compliance control for ensuring the financial security to banking institutions. The aim of the study is the complex compreh...