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Research Papers: Flows in Complex Systems

Friction Loss and Wear in a Meso Scale Wankel Compressor

[+] Author and Article Information
Wen Wang

e-mail: wenwang@sjtu.edu.cn
Institute of Refrigeration and Cryogenics,
Shanghai Jiao Tong University,
800 Dongchuan Road,
Shanghai 200240, China

1Corresponding author.

Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received April 6, 2012; final manuscript received April 20, 2013; published online June 3, 2013. Assoc. Editor: Michael G. Olsen.

J. Fluids Eng 135(8), 081103 (Jun 03, 2013) (7 pages) Paper No: FE-12-1197; doi: 10.1115/1.4024372 History: Received April 06, 2012; Revised April 20, 2013

In a meso scale Wankel compressor, the surface-to-volume ratio and the contact surfaces with friction are larger compared with conventional scale Wankel compressor. The analysis of friction loss is highly important for the design of a meso scale Wankel compressor. In this paper, we comprehensively analyze seven kinds of friction losses of a meso scale Wankel compressor. The rationality of the friction losses equations is verified by the friction loss and wear experiments that are based on a Wankel compressor prototype (the dimension of prototype is about 40 × 50 × 24 mm). The two greatest contribution of total friction loss are from the friction loss between the seal apex and internal surface of the cylinder and that among the end face of the eccentric shaft, end faces of the rotor, and endplates to total friction loss. The most sensitive parameter is eccentric distance. The relative error between the simulation and experimental results is relatively small when motor speed lies within the common range of the compressor.

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References

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Figures

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Fig. 1

Schematic of a Wankel compressor

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Fig. 2

Total friction loss variation with the structural parameters of a Wankel compressor

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Fig. 3

Design sketch and the meso Wankel compressor prototype

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Fig. 4

Friction loss experiment assembly of the meso Wankel compressor with the lubrication oil PAG46

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Fig. 5

Comparison between the simulation and experimental results of friction losses at different motor speeds

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Fig. 6

Main friction parts of the Wankel compressor prototype before and after the wear experiment (a) and (b) represent before and after the wear experiment, respectively)

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