Experimental study on frictional and sealing performances of packing rings in an oil-free gas compressor

被引：0

作者：

Yang X.-B. ^{[1
,3
]}

Jin X.-Q. ^{[1
]}

Du Z.-M. ^{[1
]}

Cui T.-S. ^{[2
]}

Yang S.-K. ^{[2
]}

机构：

[1] School of Mechanical Engineering, Shanghai Jiaotong University

[2] School of Energy and Power Engineering, Xi'an Jiaotong University

[3] School of Civil Engineering and Architecture, Jiaxing University, Jiaxing 314001, Zhejiang

来源：

Journal of Shanghai Jiaotong University (Science) | 2009年 / 14卷 / 06期

关键词：

Experimental study; Frictional performance; Oil-free lubrication; Packing rings; Sealing;

D O I：

10.1007/s12204-009-0725-8

中图分类号：

学科分类号：

摘要：

To enhance the reliability and to extend service life of packing rings, tribological and sealing performances are investigated based on the experimental results. Friction force, leakage rate and power consumption of three materials of pressure packing seals are measured in a refitted vertical gas compressor. The rings are made of common filled polytetrafluroethylene (Filled PTFE), PTFE reinforced with 30% mass fraction carbon fiber (30%CF+PTFE), and carbon-carbon composites infiltrated with PTFE (C/C+PTFE), respectively. It is found that packing rings will periodically vibrate with the periodic vibration of pressure packing after the travel direction of motion abruptly turns to the reverse direction. Furthermore, the amplitude of vibration slows down with the increasing crank angle. Approximate value of friction force is available by multiple-point fast Fourier transformation (FFT) employed to process the experimental results by reducing the impact of vibration to a great extent. Of three materials of rings employed in experiments, Filled PTFE presents minimal leakage rate accompanied with maximum power consumption. And 30%CF+PTFE exhibits minimum friction power and moderate leakage rate. As for C/C+PTFE, its high mechanical and thermal properties are favorable factors to enhance the ability of operating under high pressure and velocity and to improve the wear resistance. Unfortunately, this also leads to a large leakage rate. Comprehensive consideration should be taken into to evaluate the availability, reliability and service life for a type of packing ring under dry running conditions. Copyright.

引用

页码：725 / 731

页数：6

共 13 条

[1]

Klay H.R., Reciprocating compressors with labyrinth pistons for helium, Cryogenics, 15, 10, pp. 569-571, (1975)

[2]

Baumann H., Conzett M., Small oil free piston type compressor for CO<sub>2</sub>, Proceedings of International Compressor Engineering Conference at Purdue, (2002)

[3]

Baumann H., Design features of a small oil-free, reciprocating, high pressure compressor, Proceedings of International Compressor Engineering Conference at Purdue, pp. 381-385, (1994)

[4]

Coney M.W., Stephenson P., Malmgren A., Et al., Development of a reciprocating compressor using water injection to achieve quasi-isothermal compression, Proceedings of International Compressor Engineering Conference at Purdue, (2002)

[5]

Unal H., Mimaroglu A., Arda T., Friction and wear performance of some thermoplastic polymers and polymer composites against unsaturated polyester, Applied Surface Science, 252, 23, pp. 8139-8146, (2006)

[6]

Wang Y., Yan F., A study on tribological behaviour of transfer films of PTFE/bronze composites, Wear, 262, 7-8, pp. 876-882, (2007)

[7]

Shangguan Q., Cheng X., Friction and wear of rare earths modified carbon fibers filled PTFE composite under dry sliding condition, Applied Surface Science, 253, 22, pp. 9000-9006, (2007)

[8]

Maer P.S., Mitchell P.J., Atkins B.R., Multi-phase filled-plastics piston rings for non-lubricated compressors: A comparison of the performance of filled PTFE and epoxy-bonded materials in dry gases, Tribology, 6, 4, pp. 129-134, (1973)

[9]

Radcliffe C., Sealing material developments for reciprocating gas compressors, Sealing Technology, 2005, 11, pp. 7-11, (2005)

[10]

Feng Q.K., Yang S.K., Shi Z., Research on the lubrication conditions of the packing/rod system in compressors, Proceedings of International Compressor Engineering Conference at Purdue, pp. 872-876, (1990)

← 1 2 →