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Study on flow characteristics of oil viscosity pump for refrigerant compressors.

Number: pap.1051

Author(s) : SAWAI K., DOI M., ISHII N., et al.

Summary

Reciprocating compressors are commonly used in household refrigerators, and lubricants is supplied to the compression mechanism by the oil viscosity pump. While it is expected that this lubricants has a great influence on the compressor’s performance and reliability, its flow characteristics is does not mean elucidated. In this study, we examined the flow characteristics of the oil viscosity pump that had a spiral groove on the shaft surface opposite to the bearing surface, using both theoretical and experimental study. The results revealed followings: (1) When oil flow in the oil groove is assumed to be a “uniform, two-dimensional flow which is a steady and sufficiently developed laminar flow,” the theoretical flow rate in the oil viscosity pump and the pump head can be expressed with a linear function formula. It was also confirmed in experiments that both were in a linear function relationship. (2) Whether the theoretical flow rate formula can be applied does not depend on the oil groove angle, but on the oil groove length. It is possible to estimate the flow characteristics within an average relative error of 30% if the oil groove length is 60 mm or larger. (3) Whether the theoretical flow rate formula can be applied depends on the oil groove depth if the oil groove has a rectangular cross section. It is possible to estimate the flow characteristics within an average relative error of 30% if the aspect ratio of the oil groove is 0.5 or smaller.

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Pages: 8 p.

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Details

  • Original title: Study on flow characteristics of oil viscosity pump for refrigerant compressors.
  • Record ID : 30019575
  • Languages: English
  • Source: 2016 Purdue Conferences. 23rd International Compressor Engineering Conference at Purdue.
  • Publication date: 2016/07/11

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