scholarly journals Influence of Different Surface Texture Parameters on the Contact Performance of Piston Ring-Sleeve Friction Pair of Hydraulic Cylinders

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Wen’an Wang ◽  
Zhiqi Liu ◽  
Dongliang Chen ◽  
Zhiming Xie ◽  
Jianli Song
Keyword(s):  
Friction Coefficient ◽  
Surface Texture ◽  
Surface Density ◽  
Friction And Wear ◽  
Piston Ring ◽  
Friction Pair ◽  
Wear Characteristics ◽  
Texture Parameters ◽  
Cylinder Piston ◽  
Friction And Wear Characteristics

The surface texture, a major way to decrease friction and wear of the cylinder-piston ring friction pair, was conducted on cylinder-piston ring friction pair specimen using the orthogonal experimental design method to investigate the effect of different texture parameters (size, depth, shape, and surface density) of the friction and wear characteristics. Through simulation analysis, the texture parameters that affect the friction and wear characteristics are obtained. Using the evaluation method of friction coefficient and mass wear rate, the influence sequence and optimal values of texture parameters that affect friction and wear characteristics are obtained through range analysis. The results show that, after surface texture treatment under mixed lubrication conditions, the friction characteristics of the friction pair have changed and the friction coefficient and friction and wear rate have been significantly reduced. The results show that the triangular texture has a good antifriction effect, the texture depth is deepened, and the surface density and the size increases have a positive effect on the improvement of friction and wear. An ultra-depth microscope was used to observe the wear morphology of the friction and wear tests. The results show that the weakening of the third body wear by the texturing treatment and the maintenance of oil lubrication are the main reasons for reducing friction and wear.

Experimental Research of Scuffing of Friction Pair

2014 ◽  
Vol 697 ◽  
pp. 254-257
Author(s):  
Jie Lin Xu ◽  
Zeng Xiong Peng ◽  
Nan Wang ◽  
Shan Lin Xu
Keyword(s):  
Friction Coefficient ◽  
Wear Rate ◽  
High Speed ◽  
Friction And Wear ◽  
Friction Pair ◽  
Common Phenomenon ◽  
Working Pressure ◽  
Wear Characteristics ◽  
Worn Surface ◽  
Friction And Wear Characteristics

The scuffing of friction pair is a common phenomenon in conditions of high speed and pressure. It was researched on scuffing characteristics in this paper. By using UMT-3 friction and wear tester, the friction and wear characteristics of slipper pair material in hydraulic component were investigated, and the friction coeficient-speed curves in the different pressures were got, as well as the wear rate-speed curves. The worn surface morphology of pin specimen was photographed by SEM, and the formation mechanism of the worn surface was analyzed. The results suggested that: friction coefficient and wear rate would have a jump when the scuffing occurred, the friction and wear characteristics would be affected by the interaction of pressure (P) and speed (V) . The PV characteristic restricted the correlation between working pressure and speed.

Study of Friction and Wear Characteristics of the Friction Pair of Centrifugal Brake Rollers

2018 ◽  
Vol 39 (2) ◽  
pp. 145-151 ◽  
Author(s):  
A. L. Nosko ◽  
E. V. Safronov ◽  
V. A. Soloviev
Keyword(s):  
Friction And Wear ◽  
Friction Pair ◽  
Wear Characteristics ◽  
Friction And Wear Characteristics

Friction and wear characteristics of ceramics composite under multidirectional motions

2021 ◽  
pp. 135065012110421
Author(s):  
Mohammad A Chowdhury ◽  
Bengir A Shuvho ◽  
Nayem Hossain ◽  
Mahamudul Hassan ◽  
Uttam K Debnath ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Friction And Wear ◽  
Surface Hardness ◽  
Microscopic Analysis ◽  
Electron Microscopic ◽  
Wear Characteristics ◽  
Disc Configuration ◽  
Friction And Wear Characteristics

The friction and wear characteristics of stainless steel diffused with Si-based ceramics were investigated using pin-and-disc configuration under reciprocation motion, rotational motion, and simultaneous motion. The pin material was diffused by the combination of 60% Ti2O3, 30% Al2O3, and 10% Si2O3. Experiments have been carried out both in diffused and non-diffused conditions. Both the friction coefficient and wear rate have been possible to reduce by diffused pin material. The effects of both friction coefficient and wear rate have been studied on ceramics composites at different pin-and-disc motions. Experiments were conducted underpin motions of 0.15–0.25 m/s, disc motions of 0.5–0.6 m/s, and normal loads of 2.5–3.5 N. A relation was found among friction, wear and surface hardness of the composite. The friction coefficient and wear resistance were improved of stainless steel diffused with ceramics. Scanning electron microscopic analysis was performed to observe the morphology of ceramic and pin material.

Friction and Wear Characteristics of Cu-Based P/M Brake Friction Materials with Addition of Fe and C

2014 ◽  
Vol 661 ◽  
pp. 21-26 ◽  
Author(s):  
Talib Ria Jaafar ◽  
Mohd Asri Selamat ◽  
Z.J. Rusila ◽  
M.F. Ismail
Keyword(s):  
Powder Metallurgy ◽  
Friction Coefficient ◽  
Wear Mechanisms ◽  
Friction And Wear ◽  
Volume Loss ◽  
Friction Materials ◽  
Wear Characteristics ◽  
Weight Percentage ◽  
Two Samples ◽  
Friction And Wear Characteristics

Cu-based powder metallurgy friction materials were prepared by varying of Fe and C (% weight) in the friction components. The samples were compacted under the load of 24 metric tonnes and sintered at a temperature of 950 °C for 45 minutes. The friction and wear characteristics the materials developed were studied using Chase machine. The results show that Fe and C have different friction and wear characteristics. The friction coefficient of Cu-30%Fe-15%C sample maintained to be high and slightly increased after the drum temperature of 350°C and subsequently stable throughout tests. The friction of Cu-20%Fe-10%C stable until the drum temperature of 450°C and then its start to decay slightly until the end of the test. On the hand, the friction of Cu-10%Fe-5%C start to decay after sliding a few minutes at the drum temperature of 230°C. Thus, it could be postulated that the friction coefficient increased with increasing weight percentage of Fe and C in the friction components. However, the volume loss shows that there is no direct correlation with the Fe and C content. The volume loss of Cu-10%Fe-5%C was higher than the two samples which had the lowest hardness. On the hand, the volume loss of the Cu-30%Fe-15%C was slightly higher than Cu20%Fe-10%C as result of higher porosity and lower hardness. Wear mechanisms of abrasion, adhesion and thermal were observed to be operated during sliding process.

Influence of DC Steady Magnetic Field on Friction and Wear Characteristics of Friction Pair of High-Speed Steel / 2Cr13 Stainless Steel

2011 ◽  
Vol 291-294 ◽  
pp. 1521-1525 ◽  
Author(s):  
Yong Hui Wei ◽  
Yong Zhen Zhang ◽  
Yue Chen ◽  
San Ming Du
Keyword(s):  
Magnetic Field ◽  
Stainless Steel ◽  
High Speed ◽  
Friction And Wear ◽  
Friction Pair ◽  
High Speed Steel ◽  
Wear Loss ◽  
Wear Characteristics ◽  
Steady Magnetic Field ◽  
Friction And Wear Characteristics

The influence of DC steady magnetic field on dry-sliding Friction and wear characteristics of friction pair of high-speed steel (HSS) ring and 2Cr13 pin is studied by use of improved MPV-1500 type Friction and wear tester under normal temperature. Experiments show that, The wear loss of both HSS ring and 2Cr13 pin decreases gradually, along with the enhancement of the magnetic field intensity, under the load of 250N and the friction velocity of 0.6m/s; The phenomenon of negative wear loss appears to the HSS ring. The wear loss of the sample HSS ring keeps low comparing with that of the sample 2Cr13 stainless steel pin; The trend of friction coefficients decreases quickly and then slowly; Magnetic field can accelerate oxidization.

TRIBOLOGICAL PERFORMANCE OF MODIFIED FLOCCULENT GRAPHITE AS LUBRICANT ADDITIVES

2019 ◽  
Vol 27 (02) ◽  
pp. 1950108
Author(s):  
CHUAN YI XUE ◽  
SHOU REN WANG ◽  
JIN FENG LENG ◽  
YONG WANG ◽  
GAO QI WANG
Keyword(s):  
Friction And Wear ◽  
Piston Ring ◽  
Gasoline Engine ◽  
Adhesive Wear ◽  
Friction Pair ◽  
Cylinder Liner ◽  
Lubricant Additive ◽  
Suspension Stability ◽  
Wear Performance ◽  
Friction And Wear Characteristics

In this research, graphite has been found to have excellent tribological properties as a lubricant additive. To reduce high friction and wear in cylinder liner piston ring friction pairs, modified flocculent graphite have been prepared via chemical technology. The morphology and microstructure of modified flocculent graphite were investigated via SEM, EDS, XRD and IR. In this study, varying concentrations (0.1, 0.5, and 0.9 wt.%) within modified flocculent graphite were dispersed at 350 SN lubricant for Gasoline Engine. Suspension stability of the lubricating oils with modified flocculent graphite and graphite as determined by ultraviolet-visible light (UV-VIS) spectrophotometry. The friction and wear characteristics of lubricants containing materials of modified flocculent graphite were evaluated under reciprocating test conditions to simulate contact. The morphology and microstructure of the friction pair tribofilms produced during frictional contact were investigated via SEM, EDS and a 3D surface profiler. The results show that scratching, pits, furrows and adhesive wear took place, respectively, on the worn surfaces of friction pairs. But, modified flocculent graphite showed excellent friction reducing and anti-wear performance and subsequently has great potential for the application of anti-wear.

The Analysis of the Influencing Factors about Friction and Wear Characteristics of the Piston Ring in Stirling Engine

2013 ◽  
Vol 690-693 ◽  
pp. 2003-2007
Author(s):  
Dong Ya Yang ◽  
Huan Xie ◽  
Jun Gong
Keyword(s):  
Influencing Factors ◽  
Life Prediction ◽  
Friction And Wear ◽  
Piston Ring ◽  
Prediction Method ◽  
Stirling Engine ◽  
Gas Pressure ◽  
Calculation Formula ◽  
Wear Characteristics ◽  
Friction And Wear Characteristics

The problem about friction and wear characteristics of piston ring which is directly related to the sealing properties of stirling engine was analyzed. An improved seal structure of piston ring was taken as the research object, the influence of the temperature and the pressure of refrigerant were considered when the friction and wear characteristics of piston ring in stirling engine was studied. The calculation formula about radial weal amount of the piston ring with the change of the temperature and the gas pressure was derived by using the peeling wear theory. Then, the experiment was taken to confirm these formulas. The results show that the formulas were right. Hence, a viable way to analysis the sealing properties and life prediction method of piston rings was got.

scholarly journals Wear and Friction Characteristics of 65Mn Steel for Spike-Tooth Harrow

Coatings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 319
Author(s):  
Zhiguo Lu ◽  
Chuanyu Du ◽  
Qingcai Chen ◽  
Tianying Niu ◽  
Na Wang ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Working Environment ◽  
Manganese Steel ◽  
Wear Loss ◽  
Variable Parameters ◽  
Wear Characteristics ◽  
Before And After ◽  
Set Up ◽  
Worn Surface ◽  
Friction And Wear Characteristics

The friction and wear characteristics of spike-tooth material (65Mn steel) of Spike-Tooth Harrow in a two-stage peanut harvester were studied in this paper. The friction and wear tests of pin and disc on 65 manganese steel were carried out on the tribometer, then the wear loss and the friction coefficient were studied. The wear loss of the pin was acquired by calculating the mass of the pin before and after the experiment using an electronic balance. According to the actual working environment of peanut spring-finger, four variable parameters are set up: load, speed, soil moisture and soil type. The friction and wear characteristics of pins were studied under different loads, speeds and different soil environments. After wearing, the worn surface of the material was observed by scanning microscope and the wear mechanism was studied. The experimental results show that the wear of the pin increases with the increase of load and decreases with the increase of rotational speed in the same rotation number. Especially in the case of the sandy soil with 20% in moisture, a maximum wear loss of the pin is achieved.

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