Development of modified polyacrylonitrile fibers for improving tribological performance characteristics of thermoplastic polyurethane material in water‐lubricated sliding bearings

2020 ◽  
Vol 31 (12) ◽  
pp. 3258-3271
Author(s):  
Xiang Liang ◽  
Zhiwei Guo ◽  
Jun Tian ◽  
Chengqing Yuan
Keyword(s):  
Thermoplastic Polyurethane ◽  
Tribological Performance ◽  
Performance Characteristics ◽  
Sliding Bearings ◽  
Lubricated Sliding

Tribological Studies on Oscillating Bronze Bearings Lubricated With Environmentally Adapted Lubricants (EALs)

2004 ◽  
Author(s):  
Jan Ukonsaari ◽  
Elisabet Kassfeldt
Keyword(s):  
Surface Layer ◽  
Mineral Oil ◽  
Tribological Performance ◽  
Journal Bearings ◽  
Operating Conditions ◽  
Bearing Surface ◽  
Bearing Material ◽  
Sliding Bearings ◽  
Synthetic Ester ◽  
Tin Bronze

Different compositions of bronze materials are used for sliding bearings in various applications including those involving oscillatory motion and moderate temperatures. The compatibility of new environmentally adapted synthetic esters with different contacting surface materials is important to ensure good tribological performance. The present work deals with tribological studies on oscillatory journal bearings manufactured with three different compositions of bronze materials lubricated with EALs under boundary lubricated conditions. Under certain operating conditions, dissolution of alloying constituents from the bronze bearing material dissolute into the synthetic ester lubricant occur leading to the formation of a copper enriched bearing surface layer. Tin-bronze with synthetic ester lubricant showed more stable friction values and roughly ten times better wear results than the harder aluminium- and manganese-bronze and also outperformed the mineral oil under the same conditions.

Poly-p-phenyl sulfide as the material for oil-lubricated sliding bearings

2010 ◽  
Vol 31 (4) ◽  
pp. 294-300 ◽  
Author(s):  
B. M. Ginzburg ◽  
D. G. Tochil’nikov ◽  
A. I. Lyashkov ◽  
V. K. Lavrent’ev ◽  
A. M. Leksovskii ◽  
...  
Keyword(s):  
Sliding Bearings ◽  
Phenyl Sulfide ◽  
Lubricated Sliding

Fabricating fluorosilane self-assembled molecular film on Babbitt alloy and its tribological performance

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Liguo Qin ◽  
Hao Yang ◽  
Yuquan Ni ◽  
Guangneng Dong
Keyword(s):  
Contact Angle ◽  
Wear Resistance ◽  
Tribological Performance ◽  
Sliding Bearings ◽  
Content Type ◽  
Low Surface Energy ◽  
Modified Surface ◽  
Lubrication Conditions ◽  
Bare Surface ◽  
Babbitt Alloy

Purpose This study aims to improve the tribological performance of Babbitt alloy under oil lubricant condition. Thus, the surface was treated into oleophobic state by modifying with low surface energy fluorosilane (1H,1H,2H,2H-perfluorodecyltriethoxysilane). It is believed that the oleophobic surface offered excellent wear resistance of Babbitt-based tribo-pairs. Design/methodology/approach By modifying the Babbitt alloy with low surface energy fluorosilane and measuring the oil contact angle, the wetting behavior was evaluated. Using Pin on Disk tribometer, the tribological properties of bare Babbitt and modified Babbitt were quantified. The samples after the friction test were characterized by scanning electron microscope (SEM) and the anti-wear performance was evaluated under dry and oil lubrication conditions. Findings Results showed that oil contact angle of modified Babbitt was109° which was tripled compared to that of prime surface, which indicates the oleophobic behavior was greatly improved. Under dry conditions, the friction coefficient of the modified surface with different load conditions is slightly lower than that of the bare surface, while the friction coefficient of the modified surface under lubrication conditions is significantly decreased compared to that of the bare surface. Interestingly, under low load and high load, the wear rate of the modified Babbitt alloy surface is only 1/4 and 1/3 of that of the bare surface, respectively. Originality/value The work proposed an effective method to improve the Babbitt tribological performances and will lighten future ideas for the Babbitt alloy bearing with high wear resistance, which is beneficial to improve the service life of sliding bearings and has huge promotion and application value in the manufacture of sliding bearings.

EVALUATING THE INFLUENCE OF BENDING STRESS ON A 1H18N9 STEEL SHAFT WEAR PROCESS IN A WATER LUBRICATED SLIDING BEARING WITH A RUBBER BUSHING

Tribologia ◽  
2017 ◽  
Vol 276 (6) ◽  
pp. 79-85 ◽  
Author(s):  
Ewa PIĄTKOWSKA
Keyword(s):  
Wear Intensity ◽  
Bending Stress ◽  
Sliding Bearings ◽  
Sliding Bearing ◽  
Wear Process ◽  
Rubber Bearing ◽  
Before And After ◽  
Rubber Bushing ◽  
Bending Stresses ◽  
Lubricated Sliding

The issue of excessive wear of shaft journals co-working with a rubber bearing has been unexplained so far. Premature and sometimes very intensive wear of ship sliding bearings in water conditions is the reason for carry out very expensive and more frequent than expected repairs. The authors (E. Piątkowska, W. Litwin) made an attempt to find a case that influences the value of this wear described in the paper “Attempt at Evaluating the Influence of Bending Stress on Shaft Wear Process in Water Lubricated Sliding Bearing with Rubber Bush” (TRIBOLOGY 1/2017). These studies, however, did not explain the dependency of the wear process but showed how to progress further to find the answer to the question about the effect of bending stress on shaft wear. The research is continued on a modified test stand, and their results are presented in this paper. The profilographometer was used to evaluate the wear of the journal shaft. To compare wear intensity, roughness profiles have been 'removed' from the journals both before and after co-operation. They were compared in terms of bending stresses and bending moments.

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