Selecting the Method for Pre-tightening Threaded Connections of Heavy Engineering Objects

Gaydamaka, Anatoliy; Muzikin, Yuriy; Klitnoi, Volodymyr; Basova, Yevheniia; Dobrotvorskiy, Sergey

doi:10.1007/978-3-030-83368-8_7

Cited by 3 publications

(3 citation statements)

References 11 publications

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“…Зубчасті колеса редукторів важко навантажених машин, наприклад бортова коробка передач танка на максимальних потужностях або привод валків прокатних станів у звичайному режимі працюють зі значними короткочасними перевантаженнями, у середовищі підвищеної вібрації та температури часто з недостатнім змащенням і низьким рівнем повітряної та гідравлічної фільтрації [1][2][3][4][5][6][7]. Це спричиняє передчасну появу втомного викришування робочих поверхонь зубців коліс редукторів та втомне їх руйнування.…”

Section: аналіз публікаційunclassified

Diagnostics of the technical condition and predic-tion of accident-free guaranteed operating time of heavily loaded machines gear wheels

Gaydamaka¹,

Muzykin²,

Klitnoi³

2021

VEIT

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Problem. This article highlights the current state of diagnostics of gears on the level of accumulated fatigue damage in operation. The generalization of the known information on determination of a technical condition of separate gear wheels, especially with big modules (m> 20 mm), allows to outline prospects of development of such diagnostics of a technical condition of gear wheels directly in the course of operation. Goal. The goal of this study is to develop an algorithm for diagnosing the technical condition and forecasting a fault-free operation of the gears of heavy-duty machines. Methodology. The least squares method and the confidence interval method are used to predict accident-free guaranteed gear operation. Results. A procedure for diagnosing the technical condition of gears by measuring the hardness of the metal has been developed, which includes five main stages: selection of the device; choice of measurement scheme; selection of the number of measurements, number and relative position of measuring points; development of a design of a template for measurements; development of a device for fastening templates. When determining the accident-free guaranteed operating time on the basis of several criteria of the limit state, the final decision is made on the criterion that determines the minimum term. Originality. The method of forecasting accident-free guaranteed operating time of gears is chosen taking into account the stages of running-in and stable in linear function accumulation of damage in operation. Practical value. The use of the developed procedure for diagnosing the technical condition of the gears of gearboxes of heavy-duty machines will significantly increase the efficiency of their operation due to the transition from scheduled preventive maintenance to maintenance according to the actual technical condition.

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Section: аналіз публікаційunclassified

Diagnostics of the technical condition and predic-tion of accident-free guaranteed operating time of heavily loaded machines gear wheels

Gaydamaka¹,

Muzykin²,

Klitnoi³

2021

VEIT

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“…Rolling bearings are widely used in all branches of industrial production [1,2]. Many studies are devoted to modifying existing bearings [3,4], and improving their performance [5].…”

Section: Introductionmentioning

confidence: 99%

A Systematic Approach for Energy-Efficient Design of Rolling Bearing Cages

et al. 2023

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Several aspects must be considered in the design of rolling bearing cages. One of the most important considerations relates to studying and developing a stationary approach for solving problems of heat and mass transfer during convection. In this context, this paper proposes, among other achievements, the development and validation of a model of heat generation that is used, as the basis for an energy-efficient cage design in the context of the roller bearings of axle boxes for rail transport. The forces of interaction of the cage with the bearing parts are determined. The energy-efficient design of the cage is performed with modified friction surfaces in the form of convex contours of the pockets and micro-hollows on the surfaces of the pockets and support rings. On the basis of a flat model, of the interaction between the cage and the bearing parts, the pressure forces on the driving and driven rolling elements in the zone of radial loading are determined. The frictional moment of the bearing has been determined based on the integral design of the cage without taking into account lubrication during the interaction of the cage with the jumpers and with the sides of the basing ring. The calculation of the temperature gradient with standard and improved designs of bearing cages has been performed while taking air blowing into account; results showed a decrease in the average level and growth rate of the bearings’ temperature gradient with an energy-efficient cage design. Based on the obtained results, and on the developed heat generation model, a systematic approach for energy-efficient design of rolling bearing cages is proposed. The proposed approach, as well as the respective developed models, were validated by obtaining and analyzing the experimental results.

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“…Рисунок 1 -Зминання паза валу Відносні зміщення контактуючих поверхонь з'єднань призматичними шпонками можуть спричинювати повороти останніх у шпонковому пазі. Повороти шпонок виникають через нецентральне навантаження деталей силового приводу машини чи обладнання, яке може виникати через негативний вплив від перекосів, внаслідок неякісної затяжки різьбових з'єднань [4], при дії вібраційних впливів на систему [5], характерним прикладом таких явищ є зубчасті колеса в редукторах [6][7][8][9]. Спроба встановлення функціонального зв'язку між перекосом зубчастих коліс і поворотом шпонки зроблена в публікації [6].…”

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The Problem of Productivity Increase of the Unstressed Keyways Joints

Gaydamakа¹,

Kulyk²,

Muzykin³

et al. 2022

МіСАПР

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This paper reports the location of stress concentration and compares the results obtained by theoretical analysis with the analysis done by the analysis software. In order to avoid economic losses of production due to stoppages related to repair work, there is a need to study the development of measures to increase their reliability. Despite knowing the importance of this a very little research work has been reported in this field. An appropriate analysis of the literature was carried out in order to find directions for improving methods performance of keyed joints. The paper analyzes the features of the work of the most common non-stressed connections prismatic keys. Analysis of the state of operation of non-stressed keyed joints, directions for improving their designs, and modern simplified method of calculation explains the relevance of studies of workability and reliability improvement. Ways have been considered to increase the reliability of connections with prismatic keys. In this work, a review of some of the latest, most interesting, by the author's opinion, is carried out, studies on the contact interaction of parts. The requirements for the development and research of new keyed joints are formulated. The basic design of the connection with cylindrical working surfaces of the key is adopted. Known methods of determination are analyzed contact deformations by various scientific schools. The requirements for the development of the method of calculating unstressed keyways are formulated connections. All our calculations were primarily made based on the method of the Scientific School of Volgograd State Technical University and it was adopted as the basic one. Key words: non-stressed keyed connections, unstressed keyed connections, reliability, keyway connection with a cylindrical segment, contact deformation, destruction, improvement of the design, self-locking of the key, fracture

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Selecting the Method for Pre-tightening Threaded Connections of Heavy Engineering Objects

Cited by 3 publications

References 11 publications

Diagnostics of the technical condition and predic-tion of accident-free guaranteed operating time of heavily loaded machines gear wheels

Diagnostics of the technical condition and predic-tion of accident-free guaranteed operating time of heavily loaded machines gear wheels

A Systematic Approach for Energy-Efficient Design of Rolling Bearing Cages

The Problem of Productivity Increase of the Unstressed Keyways Joints

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