The Analysis of Abrasive Wear of the Helical Grooved Journal Bearing

2012 ◽  
Vol 527 ◽  
pp. 173-178 ◽  
Author(s):  
Jarosław Sep ◽  
Pawel Pawlus ◽  
Andrzej Dzierwa
Keyword(s):  
Abrasive Wear ◽  
Surface Topography ◽  
Journal Bearing ◽  
Wear Intensity ◽  
Wear Resistant ◽  
Hard Particles ◽  
Helical Groove ◽  
Twofold Decrease

The paper presents results of the tests concerning slide bearings having modified journal with helical groove. Such a bearing is more wear-resistant than the classical bearing in case of hard particles presence in oil. Investigations show that above mentioned modification results in over twofold decrease in wear intensity in case of suitable helical groove parameters. Differences in worn journals surface topography for investigated variants have also been stated.

Analysis of Wear-Resistant Materials of Mixer - Pneumosuperchargers Blades Operating under Conditions of Abrasive Wear

2021 ◽  
Vol 316 ◽  
pp. 893-898
Author(s):  
Natalya Gabelchenko ◽  
Artem Belov ◽  
Artem Kravchenko ◽  
Oleg Kryuchkov
Keyword(s):  
Mechanical Properties ◽  
Weight Loss ◽  
Wear Resistance ◽  
Chemical Composition ◽  
Abrasive Wear ◽  
Abrasive Medium ◽  
Wear Resistant ◽  
Comparative Tests ◽  
Before And After ◽  
110G13l Steel

We conducted comparative tests of the wear resistance of metals operating under abrasive conditions. Samples were cut from the working parts of mixer-pneumosuperchargers. The chemical composition and mechanical properties were determined. To compare samples under abrasive wear conditions, we designed and assembled a carousel installation. The principle of its operation is based on mixing the abrasive medium by the samples being studied with a given speed. Wear resistance was evaluated by weight loss by samples after several test cycles. To determine changes in the structure of the metal during abrasive wear, metallographic studies of the samples were carried out before and after the tests. It is shown that the best complex of service and mechanical properties is possessed by 110G13L steel.

The effect of helical groove geometry on journal abrasive wear

2013 ◽  
Vol 13 (2) ◽  
pp. 150-157 ◽  
Author(s):  
J. Sep ◽  
P. Pawlus ◽  
L. Galda
Keyword(s):  
Abrasive Wear ◽  
Helical Groove

Wear Factors of Tillage Machines Working Tools

2013 ◽  
Vol 379 ◽  
pp. 32-35
Author(s):  
A.V. Eremeev
Keyword(s):  
Abrasive Wear ◽  
Wear Resistant ◽  
Wear Process ◽  
Factors Influencing

The paper provides brief classification of wear types of tillage machines working tools. Also factors influencing abrasive wear process are determined in the case of cultivator shank of Kuzbass 8.5 seeding machine. Principles of development of wear-resistant materials and coatings are discussed.

Study to evaluate the abrasive wear resistant behavior of materials coated with Fe-Cr-Si-C

2011 ◽  
Vol 49 (04) ◽  
pp. 297-306
Author(s):  
M. YAZ ◽  
S. O. YILMAZ ◽  
T. TEKER
Keyword(s):  
Abrasive Wear ◽  
Wear Resistant

scholarly journals Abrasive wear resistance of selected woods

2017 ◽  
Vol 63 (No. 2) ◽  
pp. 91-97
Author(s):  
Brožek Milan
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Sweet Cherry ◽  
Sour Cherry ◽  
Wear Intensity ◽  
Horse Chestnut ◽  
Silver Fir ◽  
Abrasive Particles ◽  
Volume Weight ◽  
Pin On Disk

In this contribution, the results of the wear resistance study of 10 sorts of wood (apple, aspen, beech, hornbeam, horse-chestnut, London plane, mahogany, silver fir, sour cherry and sweet cherry) are published. The laboratory tests were carried out using the pin-on-disk machine when the abrasive clothes of three different grits (240, 120 and 60) were used. The wear intensity was assessed by the volume, weight and length losses of the tested samples. From the results of the carried out tests it follows that the wear resistance of different woods is different. It was proved that the wear resistance of different woods depends on the abrasive particles size, too. Also the technical-economical evaluation was part of the carried out tests. It was univocally proved that at the intensive abrasive wear using the abrasive cloth the best results were shown by hard woods, e.g. apple, beech or mahogany. Soft woods, e.g. horse-chestnut, silver fir or sweet cherry, are cheap, but their wear is bigger compared to hard woods.

scholarly journals Welding materials used to increase service life of agricultural machinery processing soil

2018 ◽  
Vol 244 ◽  
pp. 01002
Author(s):  
Petr Hrabě ◽  
Viktor Kolář ◽  
Abraham Kabutey ◽  
Aleš Sedláček
Keyword(s):  
Service Life ◽  
Abrasive Wear ◽  
Soil Treatment ◽  
Agricultural Machinery ◽  
Wear Resistant ◽  
Welding Material ◽  
Increase Service Life ◽  
Materials Used ◽  
Welding Materials

Intensive abrasive wear occurs in soil-treatment machines. This article is focused on increasing the service life of ploughs by the welding material. The welding material is applied at a 45° angle to the tool. This material is abrasive wear resistant. The welding material was applied parallel to the head of ploughshares with spacing of 60 mm. Carbide materials were used (SK 258 TiC-O, SK 900-O, SK A43-O, SK 299- O, SK A45-O, OK TUBRODUR 15.82, SK 258 TiC-O). The tested ploughshare variants were wearing the same when were used the welding material and the standard.

The Role of Particle Motion in Abrasive and Erosive Wear

2005 ◽  
Author(s):  
I. M. Hutchings
Keyword(s):  
Abrasive Wear ◽  
Particle Motion ◽  
Erosive Wear ◽  
Wear Test ◽  
Wear Particle ◽  
Analytical Models ◽  
Particle Rotation ◽  
Wear Rates ◽  
Hard Particles ◽  
Three Body

The traditional classification of abrasive wear into two-and three-body, high and low stress, open and closed etc. does not recognise the essential importance of particle motion, which is better described as either sliding or rolling. Abrasive wear tests with free abrasives can produce either type of motion, depending on the test conditions. The widely-used dry sand rubber wheel test often produces both motions over different areas of the sample. The more recent micro-scale abrasion test tends to favour one or the other over most of the wear scar area. Analytical models can be developed which allow the dominant particle motion to be predicted, and mapped using readily accessible parameters. In erosive wear, particle motion can also be important; recent work suggests that particle rotation is imparted in some types of erosive wear test, and that it may be responsible for the differences in wear rate found in tests under nominally identical conditions with different designs of apparatus. It is suggested that in the use of laboratory abrasion and erosion tests, and in the analysis of practical instances of wear by hard particles, close attention should be paid to the nature of particle motion, since this will influence both the dominant wear mechanisms and also the wear rates.

AN ANALYSIS OF THE INFLUENCE OF JOURNAL’S HELICAL GROOVE ON THE WEAR AND LOAD CAPACITY OF THE SLIDING BEARING

Tribologia ◽  
2016 ◽  
Vol 268 (4) ◽  
pp. 191-199
Author(s):  
Leszek TOMCZEWSKI ◽  
Jarosław SĘP
Keyword(s):  
Load Capacity ◽  
Journal Bearings ◽  
Sliding Bearing ◽  
Hard Particles ◽  
Effective Reduction ◽  
Oil Flow ◽  
Helical Groove ◽  
Helical Grooves ◽  
Wear Tests ◽  
Contaminated Lubrication

The article presents the results of a sliding bearing with a helical groove on a journal. The studies included wear tests with contaminated lubrication oil and computer simulation of oil flow based on which the load capacity of a bearing was determined. The 7 bearings with different variants of helical grooves on journal bearings and classical bearings were studied. It was found that the helical groove on the journal makes it possible to significantly reduce the wear of the bearing in the case of oil contamination with hard particles. It was also shown that the groove on the journal ensures an effective reduction in wear and does not result in a significant reduction of load capacity.

EFFECT OF THE ANGLE OF IMPACT OF AN ABRASIVE SOIL MASS ON STEEL WEAR INTENSITY

Tribologia ◽  
2018 ◽  
Vol 279 (3) ◽  
pp. 99-105 ◽  
Author(s):  
Jerzy NAPIÓRKOWSKI ◽  
Krzysztof LIGIER
Keyword(s):  
Abrasive Wear ◽  
Erosive Wear ◽  
Soil Mass ◽  
Rake Angle ◽  
Wear Intensity ◽  
Dynamic Impact ◽  
Working Surface ◽  
Significant Change

This article presents a study into the effect of the rake angle of the working surface of a specimen made of Hardox Extreme steel on abrasive wear intensity. The study was conducted using the “rotating bowl” method in two types of an abrasive soil mass at three specimen rake angles of 0˚, 12˚, and 17˚. No significant differences in the wear intensity were observed for a heavy abrasive soil mass, while for a light abrasive soil mass, an increase in the wear intensity was observed with an increase in the rake angle, with the greatest increase in the wear intensity occurring after a change in the rake angle from 0˚ to 12˚. Increasing the rake angle from 12˚ to 17˚ resulted in no significant change in the wear intensity. In the light abrasive soil mass, non-zero specimen rake angles increased the dynamic impact of loose abrasive wheels. The appearance of the surface of specimens subjected to abrasion under these conditions indicated a high proportion of erosive wear accompanying the scratching and ridging wear.

INFLUENCE OF CLIMATIC AGEING ON EROSIVE WEAR KINETICS OF POLYMER NANOCOATINGS

Tribologia ◽  
2018 ◽  
Vol 278 (2) ◽  
pp. 57-65 ◽  
Author(s):  
Danuta KOTNAROWSKA
Keyword(s):  
Grain Size ◽  
Silica Nanoparticles ◽  
Surface Topography ◽  
Erosive Wear ◽  
High Hardness ◽  
Wear Intensity ◽  
Alumina Nanoparticles ◽  
Polyurethane Coatings ◽  
20 Nm ◽  
Kinetics Of

The paper presents the results of erosive resistance investigation carried out on three-layer epoxy-polyurethane coating systems of different polyurethane top coat composition. Alumina nanoparticles with a grain size of 20 nm or silica nanoparticles with a grain size of 12 or 20 nm were applied for the top coat modification. Coating systems with top coats modified using silica nanoparticles with the grain size of 12 nm (nanocoatings) revealed the highest erosive resistance, whereas the lowest one was observed in the case of coating systems with unmodified top coats. Lower erosive wear intensity of nanocoatings follows on their relatively high hardness, as well as low surface roughness. Moreover, nanofillers contained in the top coat reduce the development of defects (pores, cracks) in its structure, increasing the erosive resistance of the coatings. Climatic ageing substantially influenced the formation of polyurethane coatings surface topography. Polyurethane coatings modified with nanofillers showed less change in their surface topography than did unmodified coatings. Therefore, the modification of polyurethane top coats with nanofillers decreases their surface susceptibility to destruction.

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