Title:
ROTARY MACHINE AND REFRIGERATION CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/025416
Kind Code:
A1
Abstract:
The objective of the present invention is to provide a rotary machine and a refrigeration cycle device with which the shear resistance of an oil film of a lubricating oil between a sliding bearing and the outer peripheral surface of a rotating shaft can be reduced, thereby reducing bearing loss during fluid lubrication, and enabling the reliability of the bearing to be maintained even during a high-load operation. This rotary machine is equipped with: a rotating shaft; a housing part having a hole in which the shaft is inserted; a first bearing part arranged nearest one end in the axial direction within the hole of the housing part; a second bearing part arranged nearest the other end; and an intermediate bearing part arranged between the first bearing part and the second bearing part, with the linear expansion coefficient of the primary material forming the intermediate bearing part being less than that of the housing part, the first bearing part, the second bearing part, and the shaft, and with the gap between the intermediate bearing part and the outer peripheral surface of the shaft before the shaft begins to rotate being larger than the gap between the intermediate bearing part and the first bearing part and the gap between the intermediate bearing part and the second bearing part.
Inventors:
OYAMADA TOMONAGA (JP)
Application Number:
PCT/JP2013/072493
Publication Date:
February 26, 2015
Filing Date:
August 23, 2013
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
F16C17/22; F04B39/00; F04C29/00; F16C17/26
Domestic Patent References:
| WO2004081400A1 | 2004-09-23 |
Foreign References:
| JP2008301624A | 2008-12-11 | |||
| JPS62155327A | 1987-07-10 | |||
| JPS6362625U | 1988-04-25 | |||
| JPH01163214U | 1989-11-14 | |||
| JPH09184514A | 1997-07-15 | |||
| JPH10112956A | 1998-04-28 | |||
| JP2001124070A | 2001-05-08 | |||
| JPH08224805A | 1996-09-03 | |||
| JP2008101538A | 2008-05-01 |
Attorney, Agent or Firm:
INOUE Manabu et al. (JP)
Manabu Inoue (JP)
Manabu Inoue (JP)
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