Theoretical wear research of conical friction bearing

Fizmatkniga, 2010

The theory of contact interaction with account of wear of contacting bodies (wear contact problem) is an effective means to calculate wear of friction units and hence to estimate their operating life. At present a number of analytical and numerical approaches to solution of the wear contact problem are developed, which often involve complicated mathematical apparatus or use considerable computational resources. Considered in this book statements and methods to solve the wear contact problem are characterized by simplicity of mathematical apparatus and allow of a simple numerical implementation and even, in some cases, an analytical description of the wear process. Author was aiming not to overload the book by strict mathematical calculations, replacing them sometimes physically understandable explanations. In spite of all this the described methods seem as quite universal ones and can be used for solution of the wear contact problem in more complicated statements. A significant attention in the book is devoted to the effects caused by peculiarities of the wear law. In this connection author had considered it appropriate to provide the book by a review of the main results on theoretical and experimental studies of the wear law for different materials and conditions.

Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas, 2020

The article considers the problem of designing a tool for friction hardening to increase the fatigue strength for conical threaded joints of elements of oilfield and drilling equipment. To increase the fatigue strength, a tool was developed for frictional strengthening of the working surface of the thread. The proposed design of the tool solves the current problem of simultaneous strengthening of depressions and side surfaces of the conical notch, which provides an increase in both fatigue strength and wear resistance. The design dimensions of the developed tool are determined using geometric modeling. The scientific novelty of the developed tool design is to solve the problem of simultaneous strengthening of depressions and surfaces of the conical groove profile, namely different lengths of the side surfaces of the conical groove, by modifying its lateral deforming elements. This simplifies the manufacture of the tool, increases the stability of the tool, the stability of the param...

Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies", 2019

Зуб Євген Петрович, аспірант (аспірант кафедри «Вагони та вагонне господарство», Державний університет інфраструктури та технологій) Сапронова Світлана Юріївна, д.т.н., проф. (професор кафедри «Вагони та вагонне господарство», Державний університет інфраструктури та технологій) Ткаченко Віктор Петрович, д.т.н., проф. (завідувач кафедри «Тяговий рухомий склад залізниць», Державний університет інфраструктури та технологій) АНАЛІЗ СИСТЕМ МОНІТОРИНГУ ПАРАМЕТРІВ ЗНОСУ КОЛІСНИХ ПАР РУХОМОГО СКЛАДУ ЗАЛІЗНИЦЬ В статті проведений аналіз систем контролю технічного стану колісних пар як на залізницях України, так і в світі. Розкрито переваги та недоліки цих систем. Розглянуто принцип дії та складові систем, завдяки яким здійснюється фіксація та контроль параметрів зносу колісних пар. Стаціонарний пристрій для контролю технічного стану колісних пар рухомого складу залізниць, запропонований авторами, особливо актуальний при оперативному виявленні дефектів колісних пар, які є загрозою безпеки руху поїздів. Зроблено висновок про те, що на залізницях України не повною мірою впроваджено повноцінний автоматизований контроль технічного стану колісних пар. Ключові слова: рухомий склад залізниць, колісна пара, поверхня кочення, система моніторингу, контроль параметрів зносу.

Bulletin of the National Technical University «KhPI». Series: Automobile and Tractor Construction

The article provides a search and analysis of the design parameters of disc brake mechanisms that provide regulated braking efficiency and wear resistance of friction pairs in order to increase their durability. To assess the relative wear of the friction surfaces of the disc brake mechanisms of passenger cars, an assessment was made of the parameters that can characterize the wear of the interface. On the example of Lanos passenger cars, the possibilities of prospects for further calculation of the coefficients of wear resistance of materials of friction bodies using generalized mathematical models, such as a model of wear of friction pairs of disc brakes, including the design parameters of friction surfaces, the magnitude of the drive pressure, the initial braking speed of the car and the braking time, are considered. wear occurs

Bulletin of the National Technical University «KhPI». Series: Automobile and Tractor Construction

A mathematical model of wear of friction surfaces of disc brake mechanisms of a passenger car during braking is proposed. For passenger cars, the work of the created algorithm is considered, the results of the program and the analysis of the results of the computational experiment are given. The prospects for further research to determine the wear resistance coefficient of materials for mating parts of disc brake mechanisms are also considered.

Science intensive technologies in mechanical engineering, 2019

The paper reports the calculation-experimental method for the definition of abrasion layer wear parameters and presents the results of these parameters changes depending on machining conditions at globoidal gear honing. As a parameter for the definition working surface wear in a globoidal gear hone with organic rubber-based binding there is chosen a parameter widely used for the assessment of diamond tool wear – specific consumption of abrasion. The use of this parameter allows defining dimension wear of tool abrasion layer in a computation way, including operation surfaces of the globoidal hone.

Bulletin of the National Technical University «KhPI». Series: Automobile and Tractor Construction

The paper presents the results of a research on the creation of a methodology for predicting the durability of friction linings of tractor brake mechanisms at the design stage. Not only an increase in engine power and tractor weight is taken into account, but also the installation of more advanced brake mechanisms. Thanks to the developed method for predicting the durability of the friction linings of tractor brake mechanisms, the use of unified disc brakes is justified. To solve the problem, the similarity theory was used, in which the most intense loading mode of the tractor brake mechanisms was modeled. As an indicator, the maximum work performed by the brakes until the friction linings are completely worn out was used. The results of estimating the resource of the friction linings of the tractor brake mechanisms under the most intense loading conditions were compared with the results of the calculation under the actual loading conditions.

Science intensive technologies in mechanical engineering, 2018

Within the limits of the paper there is formed a generalized idea of the problem of flange damages in railway wheel pairs, and also a comparative analysis of different methods application to increase wear-resistance and contact fatigue strength of surfaces mentined.

Eastern-European Journal of Enterprise Technologies, 2015

Доктор физико-математических наук, профессор, членкорресподент НАН Украины, директор* Доктор технических наук, старший научный сотрудник, заместитель директора* Кандидат физико-математических наук, старший научный сотрудник** Инженер-исследователь** Кандидат технических наук, доцент Национальный университет гражданской защиты Украины ул. Чернышевского, 56, г. Харьков, Украина *Институт электрофизики и радиационных технологий НАН Украины ул. Гуданова,