An Experimental Study on Oil-Air Lubrication of Sliding Friction Element

The objective of this research is to study the lubricating property of oil-air lubrication on sliding friction element. The performance of sliding friction element under different lubrication parameters and preloads were investigated by measuring the element’s temperature and friction coefficient. The results show that oil air lubrication could complete the lubrication and cooling of sliding friction element. As the oil supply is increased at the same load, speed and air supply level, the temperature rise and friction coefficient decrease, but when the oil supply is increased to 15ml/h, they remain unchanged. As the air supply is increased at the same load, speed and oil supply level, the temperature rise decreases monotonically and the friction coefficient remains steady.

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The Research on the Lubricating Property of Oil-Air Lubrication in the Sliding Friction Element

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.572.397 ◽

2013 ◽

Vol 572 ◽

pp. 397-400

Author(s):

Shao Gang Liu ◽

Li Quan Li ◽

Jin Li Wang

Keyword(s):

Friction Coefficient ◽

Sliding Friction ◽

Testing Machine ◽

Wear Testing ◽

Conical Nozzle ◽

Rotating Speed ◽

Friction Element ◽

Oil Supply ◽

Air Supply ◽

Air Lubrication

The influence of the oil supply, nozzle type, air supply, the performance of sliding friction element under the lubrication preloads were investigated by measuring the element’s temperature and friction coefficient based on the M2000-A friction wear testing machine. When the load, rotating speed and air supply is at 1500N, 210rpm and 2.25 m3/h level respectively, as the oil supply is increased, the temperature rises and friction coefficient decreases. The temperature rise decreases monotonically. The friction coefficient rises monotonically with the air supply increases when the air supply is less than 2.4m3/h, but when the air supply is more than 2.4m3/h, the friction coefficient decreases monotonically. Furthermore, when the oil supply is reached 15ml/h, they remain almost unchanged regardless of direct nozzle and conical nozzle. Nevertheless, the direct nozzle is more suitable than the conical nozzle in oil-air lubrication of the sliding friction pairs .

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The Research on Oil-Air Lubrication and Oil Lubrication Used in the Sliding Friction Element

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.486.283 ◽

2011 ◽

Vol 486 ◽

pp. 283-286 ◽

Cited By ~ 1

Author(s):

Li Quan Li ◽

Shao Gang Liu ◽

Jin Li Wang ◽

Lin Cai

Keyword(s):

Friction Coefficient ◽

Flow Rate ◽

Temperature Rise ◽

Sliding Friction ◽

Testing Machine ◽

Oil Lubrication ◽

Rotating Speed ◽

Friction Element ◽

Air Lubrication ◽

Oil Flow

In order to study the effect of oil-air lubrication on sliding friction element, the experiments between oil-air lubrication and oil lubrication have been done by using friction-abrasion testing machine. By means of measuring the temperature rise, the friction coefficient of two different lubrication systems in the same conditions and studying the temperature rise and the friction coefficient of oil-air lubrication with different oil flow rate at the same load and rotating speed level, the results obtained show that when the oil flow rate of oil- air lubrication is equal to 10ml/h, the temperature rise of the element is the same as submerged lubrication caused. As the effect of oil aeration, the friction coefficient of oil-air lubrication is higher. When the load and rotating speed is at 1500N, 210rpm level, as the oil flow rate increases, the temperature rise and friction coefficient of oil-air lubrication element decreases significantly, however, they remain almost unchanged with the increasing of oil supply while the oil flow rate is increased to 15ml/h.

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The Research on Oil-Air Lubrication in Grooved Sliding Bearing

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.572.384 ◽

2013 ◽

Vol 572 ◽

pp. 384-387

Author(s):

Jin Li Wang ◽

Li Quan Li ◽

Shao Gang Liu

Keyword(s):

Friction Coefficient ◽

Temperature Rise ◽

Testing Machine ◽

Air Pressure ◽

Oil Lubrication ◽

Experimental Conditions ◽

Sliding Bearing ◽

Oil Supply ◽

Air Lubrication ◽

Bearing Structure

Many Factors affect the oil-air lubrication of sliding bearing such as oil supply, air pressure, load, bearing structure and so on. In order to study the effects of bearing structure on oil-air lubrication in sliding bearing, the oil-air lubrication and oil lubrication experiments of grooved sliding bearing have been done by using friction-abrasion testing machine. By means of measuring the temperature rise and the friction coefficient of grooved sliding bearing on oil-air lubrication and oil lubrication with different level of load at the same rotating speed, the results obtained show that the friction coefficient of oil-air lubrication with oil supply 30ml/h, air pressure 0.25MPa is almost the same as oil lubrication with oil supply 1.4L/h. The oil-air lubrication temperature rise is much lower than the oil lubrication in grooved sliding bearing with the same experimental conditions.

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The Research on Oil-Air Lubrication and Oil Lubrication in the Sliding Bearing

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.572.393 ◽

2013 ◽

Vol 572 ◽

pp. 393-396

Author(s):

Li Quan Li ◽

Shao Gang Liu ◽

Jin Li Wang

Keyword(s):

Temperature Rise ◽

Testing Machine ◽

Oil Lubrication ◽

Experimental Conditions ◽

Sliding Bearing ◽

Rotating Speed ◽

Oil Supply ◽

Friction Moment ◽

Air Lubrication ◽

Speed Level

In order to study the effect of oil-air lubrication on traditional sliding bearing, the experiments oil-air lubrication and oil lubrication have been done by using friction-abrasion testing machine. By means of measuring friction moment, the temperature rise of two different lubrication systems in the same conditions and studying the friction moment and the temperature rise of oil-air lubrication and oil lubrication with different load at the same rotating speed level, the results obtained show that when rotating speed and oil supply is at 210rpm and 1.4L/h level, the friction moment of traditional sliding bearing with oil lubrication increases significantly after the load 900N, and when rotating speed, oil supply and air pressure is at 210rpm , 30ml/h and 0.25MPa level, the friction moment of traditional sliding bearing with oil-air lubrication increases significantly after the load 1500N. The friction moment of oil-air lubrication and oil lubrication is almost the same before the load 900N, and after the load 900N, the friction moment of oil-air lubrication is much lower than the oil lubrication. The oil-air lubrication temperature rise is much lower than the oil lubrication in traditional sliding bearing with the same experimental conditions.

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The Research on Oil-air Lubrication and Oil Lubrication in the Rolling-sliding Friction Element

2011 International Conference on Internet Computing and Information Services ◽

10.1109/icicis.2011.84 ◽

2011 ◽

Author(s):

Liquan Li ◽

Shaogang Liu ◽

Jinli Wang ◽

Jipeng Liu

Keyword(s):

Sliding Friction ◽

Oil Lubrication ◽

Friction Element ◽

Air Lubrication

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Formation of multiple combustion fronts in an imbert downdraft gasification reactor

E3S Web of Conferences ◽

10.1051/e3sconf/202130201007 ◽

2021 ◽

Vol 302 ◽

pp. 01007

Author(s):

Kittipass Wasinarom ◽

Sarawut Sungworagarn ◽

Prasan Sathitruangsak ◽

Kasemsil Onthong

Keyword(s):

Heat Transfer ◽

Experimental Study ◽

Heat Transfer Rate ◽

Oxygen Concentration ◽

Temperature Rise ◽

Combustion Front ◽

Transfer Rate ◽

Air Inlet ◽

Air Supply

The experimental study of downdraft gasification was performed in this paper. The operation which led to the formation of the second combustion front was pointed out. In this situation, both combustion fronts will lose their intensity and finally be extinguished. The operation was unintentionally stopped. It was revealed that the combustion front propagated upward in the reactor after starting the test. While it was about to reach the air inlet nozzle, the second combustion front was detected by an abrupt temperature rise of the thermocouple above the air supply nozzle. After the formation of the second combustion front, both fronts started to lose their intensity which indicated by the decrease in temperature corresponding with their locations. It was possible that the second combustion front would dilute the oxygen concentration supplied to the first combustion front. The decreasing temperature of the first combustion front reduced the heat transfer rate to the second combustion front. Finally, both combustion fronts were extinguished. The operation was unintentionally stopped.

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Experimental Study on Longitudinal Sliding Friction Coefficient of Sedan Braking

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.779-780.890 ◽

2013 ◽

Vol 779-780 ◽

pp. 890-893

Author(s):

Gui Fan Zhao ◽

Zhen Zhang ◽

Ke Qing ◽

Hong Yuan Xiao

Keyword(s):

Experimental Study ◽

Friction Coefficient ◽

Surface Properties ◽

Sliding Friction ◽

Large Range ◽

Orthogonal Experiment ◽

Tire Pressure ◽

Sliding Friction Coefficient ◽

Influence Degree ◽

The Relationship

The factors relation to the longitudinal sliding friction coefficient of sedan braking are numerous,and the affects of each factor are complex.This paper selects speed, load,tire pressure,road surface properties,road conditions,through orthogonal experiment,getting the influence degree of each factor.Regarding to the large range of sedan speed,studying the relationship between the friction coefficient and the speed,and getting the influence trend.

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